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strict';\nvar uncurryThis = require('../internals/function-uncurry-this');\n\nvar $Error = Error;\nvar replace = uncurryThis(''.replace);\n\nvar TEST = (function (arg) { return String($Error(arg).stack); })('zxcasd');\n// eslint-disable-next-line redos/no-vulnerable -- safe\nvar V8_OR_CHAKRA_STACK_ENTRY = /\\n\\s*at [^:]*:[^\\n]*/;\nvar IS_V8_OR_CHAKRA_STACK = V8_OR_CHAKRA_STACK_ENTRY.test(TEST);\n\nmodule.exports = function (stack, dropEntries) {\n  if (IS_V8_OR_CHAKRA_STACK && typeof stack == 'string' && !$Error.prepareStackTrace) {\n    while (dropEntries--) stack = replace(stack, V8_OR_CHAKRA_STACK_ENTRY, '');\n  } return stack;\n};\n","import window from 'global/window';\nvar regexs = {\n  // to determine mime types\n  mp4: /^(av0?1|avc0?[1234]|vp0?9|flac|opus|mp3|mp4a|mp4v|stpp.ttml.im1t)/,\n  webm: /^(vp0?[89]|av0?1|opus|vorbis)/,\n  ogg: /^(vp0?[89]|theora|flac|opus|vorbis)/,\n  // to determine if a codec is audio or video\n  video: /^(av0?1|avc0?[1234]|vp0?[89]|hvc1|hev1|theora|mp4v)/,\n  audio: /^(mp4a|flac|vorbis|opus|ac-[34]|ec-3|alac|mp3|speex|aac)/,\n  text: /^(stpp.ttml.im1t)/,\n  // mux.js support regex\n  muxerVideo: /^(avc0?1)/,\n  muxerAudio: /^(mp4a)/,\n  // match nothing as muxer does not support text right now.\n  // there cannot never be a character before the start of a string\n  // so this matches nothing.\n  muxerText: /a^/\n};\nvar mediaTypes = ['video', 'audio', 'text'];\nvar upperMediaTypes = ['Video', 'Audio', 'Text'];\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string} codec\n *        Codec string to translate\n * @return {string}\n *         The translated codec string\n */\n\nexport var translateLegacyCodec = function translateLegacyCodec(codec) {\n  if (!codec) {\n    return codec;\n  }\n\n  return codec.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (orig, profile, avcLevel) {\n    var profileHex = ('00' + Number(profile).toString(16)).slice(-2);\n    var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);\n    return 'avc1.' + profileHex + '00' + avcLevelHex;\n  });\n};\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec strings with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string[]} codecs\n *        An array of codec strings to translate\n * @return {string[]}\n *         The translated array of codec strings\n */\n\nexport var translateLegacyCodecs = function translateLegacyCodecs(codecs) {\n  return codecs.map(translateLegacyCodec);\n};\n/**\n * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the\n * standard `avc1.<hhhhhh>`.\n *\n * @param {string} codecString\n *        The codec string\n * @return {string}\n *         The codec string with old apple-style codecs replaced\n *\n * @private\n */\n\nexport var mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {\n  return codecString.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (match) {\n    return translateLegacyCodecs([match])[0];\n  });\n};\n/**\n * @typedef {Object} ParsedCodecInfo\n * @property {number} codecCount\n *           Number of codecs parsed\n * @property {string} [videoCodec]\n *           Parsed video codec (if found)\n * @property {string} [videoObjectTypeIndicator]\n *           Video object type indicator (if found)\n * @property {string|null} audioProfile\n *           Audio profile\n */\n\n/**\n * Parses a codec string to retrieve the number of codecs specified, the video codec and\n * object type indicator, and the audio profile.\n *\n * @param {string} [codecString]\n *        The codec string to parse\n * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var parseCodecs = function parseCodecs(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  var codecs = codecString.split(',');\n  var result = [];\n  codecs.forEach(function (codec) {\n    codec = codec.trim();\n    var codecType;\n    mediaTypes.forEach(function (name) {\n      var match = regexs[name].exec(codec.toLowerCase());\n\n      if (!match || match.length <= 1) {\n        return;\n      }\n\n      codecType = name; // maintain codec case\n\n      var type = codec.substring(0, match[1].length);\n      var details = codec.replace(type, '');\n      result.push({\n        type: type,\n        details: details,\n        mediaType: name\n      });\n    });\n\n    if (!codecType) {\n      result.push({\n        type: codec,\n        details: '',\n        mediaType: 'unknown'\n      });\n    }\n  });\n  return result;\n};\n/**\n * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is\n * a default alternate audio playlist for the provided audio group.\n *\n * @param {Object} master\n *        The master playlist\n * @param {string} audioGroupId\n *        ID of the audio group for which to find the default codec info\n * 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isTextCodec = function isTextCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.text.test(codec.trim().toLowerCase());\n};\nexport var getMimeForCodec = function getMimeForCodec(codecString) {\n  if (!codecString || typeof codecString !== 'string') {\n    return;\n  }\n\n  var codecs = codecString.toLowerCase().split(',').map(function (c) {\n    return translateLegacyCodec(c.trim());\n  }); // default to video type\n\n  var type = 'video'; // only change to audio type if the only codec we have is\n  // audio\n\n  if (codecs.length === 1 && isAudioCodec(codecs[0])) {\n    type = 'audio';\n  } else if (codecs.length === 1 && isTextCodec(codecs[0])) {\n    // text uses application/<container> for now\n    type = 'application';\n  } // default the container to mp4\n\n\n  var container = 'mp4'; // every codec must be able to go into the container\n  // for that container to be the correct one\n\n  if (codecs.every(function (c) {\n    return regexs.mp4.test(c);\n  })) {\n    container = 'mp4';\n  } else if (codecs.every(function (c) {\n    return regexs.webm.test(c);\n  })) {\n    container = 'webm';\n  } else if (codecs.every(function (c) {\n    return regexs.ogg.test(c);\n  })) {\n    container = 'ogg';\n  }\n\n  return type + \"/\" + container + \";codecs=\\\"\" + codecString + \"\\\"\";\n};\nexport var browserSupportsCodec = function browserSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return window.MediaSource && window.MediaSource.isTypeSupported && window.MediaSource.isTypeSupported(getMimeForCodec(codecString)) || false;\n};\nexport var muxerSupportsCodec = function muxerSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return codecString.toLowerCase().split(',').every(function (codec) {\n    codec = codec.trim(); // any match is supported.\n\n    for (var i = 0; i < upperMediaTypes.length; i++) {\n      var type = upperMediaTypes[i];\n\n      if (regexs[\"muxer\" + type].test(codec)) {\n        return true;\n      }\n    }\n\n    return false;\n  });\n};\nexport var DEFAULT_AUDIO_CODEC = 'mp4a.40.2';\nexport var DEFAULT_VIDEO_CODEC = 'avc1.4d400d';","var dom = require('./dom')\nexports.DOMImplementation = dom.DOMImplementation\nexports.XMLSerializer = dom.XMLSerializer\nexports.DOMParser = require('./dom-parser').DOMParser\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\n\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\n\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\n\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function() {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function() {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}\n","'use strict';\nvar NATIVE_BIND = require('../internals/function-bind-native');\n\nvar FunctionPrototype = Function.prototype;\nvar apply = FunctionPrototype.apply;\nvar call = FunctionPrototype.call;\n\n// eslint-disable-next-line es/no-reflect -- safe\nmodule.exports = typeof Reflect == 'object' && Reflect.apply || (NATIVE_BIND ? call.bind(apply) : function () {\n  return call.apply(apply, arguments);\n});\n","import { toUint8, bytesMatch } from './byte-helpers.js';\nvar ID3 = toUint8([0x49, 0x44, 0x33]);\nexport var getId3Size = function getId3Size(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n  var flags = bytes[offset + 5];\n  var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];\n  var footerPresent = (flags & 16) >> 4;\n\n  if (footerPresent) {\n    return returnSize + 20;\n  }\n\n  return returnSize + 10;\n};\nexport var getId3Offset = function getId3Offset(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n\n  if (bytes.length - offset < 10 || !bytesMatch(bytes, ID3, {\n    offset: offset\n  })) {\n    return offset;\n  }\n\n  offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files\n  // have multiple ID3 tag sections even though\n  // they should not.\n\n  return getId3Offset(bytes, offset);\n};","\"use strict\";\n\nvar window = require(\"global/window\");\n\nvar _extends = require(\"@babel/runtime/helpers/extends\");\n\nvar isFunction = require('is-function');\n\ncreateXHR.httpHandler = require('./http-handler.js');\n/**\n * @license\n * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>\n * Copyright (c) 2014 David Björklund\n * Available under the MIT license\n * <https://github.com/kesla/parse-headers/blob/master/LICENCE>\n */\n\nvar parseHeaders = function parseHeaders(headers) {\n  var result = {};\n\n  if (!headers) {\n    return result;\n  }\n\n  headers.trim().split('\\n').forEach(function (row) {\n    var index = row.indexOf(':');\n    var key = row.slice(0, index).trim().toLowerCase();\n    var value = row.slice(index + 1).trim();\n\n    if (typeof result[key] === 'undefined') {\n      result[key] = value;\n    } else if (Array.isArray(result[key])) {\n      result[key].push(value);\n    } else {\n      result[key] = [result[key], value];\n    }\n  });\n  return result;\n};\n\nmodule.exports = createXHR; // Allow use of default import syntax in TypeScript\n\nmodule.exports.default = createXHR;\ncreateXHR.XMLHttpRequest = window.XMLHttpRequest || noop;\ncreateXHR.XDomainRequest = \"withCredentials\" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window.XDomainRequest;\nforEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function (method) {\n  createXHR[method === \"delete\" ? \"del\" : method] = function (uri, options, callback) {\n    options = initParams(uri, options, callback);\n    options.method = method.toUpperCase();\n    return _createXHR(options);\n  };\n});\n\nfunction forEachArray(array, iterator) {\n  for (var i = 0; i < array.length; i++) {\n    iterator(array[i]);\n  }\n}\n\nfunction isEmpty(obj) {\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) return false;\n  }\n\n  return true;\n}\n\nfunction initParams(uri, options, callback) {\n  var params = uri;\n\n  if (isFunction(options)) {\n    callback = options;\n\n    if (typeof uri === \"string\") {\n      params = {\n        uri: uri\n      };\n    }\n  } else {\n    params = _extends({}, options, {\n      uri: uri\n    });\n  }\n\n  params.callback = callback;\n  return params;\n}\n\nfunction createXHR(uri, options, callback) {\n  options = initParams(uri, options, callback);\n  return _createXHR(options);\n}\n\nfunction _createXHR(options) {\n  if (typeof options.callback === \"undefined\") {\n    throw new Error(\"callback argument missing\");\n  }\n\n  var called = false;\n\n  var callback = function cbOnce(err, response, body) {\n    if (!called) {\n      called = true;\n      options.callback(err, response, body);\n    }\n  };\n\n  function readystatechange() {\n    if (xhr.readyState === 4) {\n      setTimeout(loadFunc, 0);\n    }\n  }\n\n  function getBody() {\n    // Chrome with requestType=blob throws errors arround when even testing access to responseText\n    var body = undefined;\n\n    if (xhr.response) {\n      body = xhr.response;\n    } else {\n      body = xhr.responseText || getXml(xhr);\n    }\n\n    if (isJson) {\n      try {\n        body = JSON.parse(body);\n      } catch (e) {}\n    }\n\n    return body;\n  }\n\n  function errorFunc(evt) {\n    clearTimeout(timeoutTimer);\n\n    if (!(evt instanceof Error)) {\n      evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\"));\n    }\n\n    evt.statusCode = 0;\n    return callback(evt, failureResponse);\n  } // will load the data & process the response in a special response object\n\n\n  function loadFunc() {\n    if (aborted) return;\n    var status;\n    clearTimeout(timeoutTimer);\n\n    if (options.useXDR && xhr.status === undefined) {\n      //IE8 CORS GET successful response doesn't have a status field, but body is fine\n      status = 200;\n    } else {\n      status = xhr.status === 1223 ? 204 : xhr.status;\n    }\n\n    var response = failureResponse;\n    var err = null;\n\n    if (status !== 0) {\n      response = {\n        body: getBody(),\n        statusCode: status,\n        method: method,\n        headers: {},\n        url: uri,\n        rawRequest: xhr\n      };\n\n      if (xhr.getAllResponseHeaders) {\n        //remember xhr can in fact be XDR for CORS in IE\n        response.headers = parseHeaders(xhr.getAllResponseHeaders());\n      }\n    } else {\n      err = new Error(\"Internal XMLHttpRequest Error\");\n    }\n\n    return callback(err, response, response.body);\n  }\n\n  var xhr = options.xhr || null;\n\n  if (!xhr) {\n    if (options.cors || options.useXDR) {\n      xhr = new createXHR.XDomainRequest();\n    } else {\n      xhr = new createXHR.XMLHttpRequest();\n    }\n  }\n\n  var key;\n  var aborted;\n  var uri = xhr.url = options.uri || options.url;\n  var method = xhr.method = options.method || \"GET\";\n  var body = options.body || options.data;\n  var headers = xhr.headers = options.headers || {};\n  var sync = !!options.sync;\n  var isJson = false;\n  var timeoutTimer;\n  var failureResponse = {\n    body: undefined,\n    headers: {},\n    statusCode: 0,\n    method: method,\n    url: uri,\n    rawRequest: xhr\n  };\n\n  if (\"json\" in options && options.json !== false) {\n    isJson = true;\n    headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n    if (method !== \"GET\" && method !== \"HEAD\") {\n      headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n      body = JSON.stringify(options.json === true ? body : options.json);\n    }\n  }\n\n  xhr.onreadystatechange = readystatechange;\n  xhr.onload = loadFunc;\n  xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.\n\n  xhr.onprogress = function () {// IE must die\n  };\n\n  xhr.onabort = function () {\n    aborted = true;\n  };\n\n  xhr.ontimeout = errorFunc;\n  xhr.open(method, uri, !sync, options.username, options.password); //has to be after open\n\n  if (!sync) {\n    xhr.withCredentials = !!options.withCredentials;\n  } // Cannot set timeout with sync request\n  // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n  // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n\n\n  if (!sync && options.timeout > 0) {\n    timeoutTimer = setTimeout(function () {\n      if (aborted) return;\n      aborted = true; //IE9 may still call readystatechange\n\n      xhr.abort(\"timeout\");\n      var e = new Error(\"XMLHttpRequest timeout\");\n      e.code = \"ETIMEDOUT\";\n      errorFunc(e);\n    }, options.timeout);\n  }\n\n  if (xhr.setRequestHeader) {\n    for (key in headers) {\n      if (headers.hasOwnProperty(key)) {\n        xhr.setRequestHeader(key, headers[key]);\n      }\n    }\n  } else if (options.headers && !isEmpty(options.headers)) {\n    throw new Error(\"Headers cannot be set on an XDomainRequest object\");\n  }\n\n  if (\"responseType\" in options) {\n    xhr.responseType = options.responseType;\n  }\n\n  if (\"beforeSend\" in options && typeof options.beforeSend === \"function\") {\n    options.beforeSend(xhr);\n  } // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n  // XMLHttpRequest spec says to pass null as body to indicate no body\n  // See https://github.com/naugtur/xhr/issues/100.\n\n\n  xhr.send(body || null);\n  return xhr;\n}\n\nfunction getXml(xhr) {\n  // xhr.responseXML will throw Exception \"InvalidStateError\" or \"DOMException\"\n  // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.\n  try {\n    if (xhr.responseType === \"document\") {\n      return xhr.responseXML;\n    }\n\n    var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\";\n\n    if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n      return xhr.responseXML;\n    }\n  } catch (e) {}\n\n  return null;\n}\n\nfunction noop() {}","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\nvar\n  ONE_SECOND_IN_TS = 90000, // 90kHz clock\n  secondsToVideoTs,\n  secondsToAudioTs,\n  videoTsToSeconds,\n  audioTsToSeconds,\n  audioTsToVideoTs,\n  videoTsToAudioTs,\n  metadataTsToSeconds;\n\nsecondsToVideoTs = function(seconds) {\n  return seconds * ONE_SECOND_IN_TS;\n};\n\nsecondsToAudioTs = function(seconds, sampleRate) {\n  return seconds * sampleRate;\n};\n\nvideoTsToSeconds = function(timestamp) {\n  return timestamp / ONE_SECOND_IN_TS;\n};\n\naudioTsToSeconds = function(timestamp, sampleRate) {\n  return timestamp / sampleRate;\n};\n\naudioTsToVideoTs = function(timestamp, sampleRate) {\n  return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n};\n\nvideoTsToAudioTs = function(timestamp, sampleRate) {\n  return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n};\n\n/**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\nmetadataTsToSeconds = function(timestamp, timelineStartPts, keepOriginalTimestamps) {\n  return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n};\n\nmodule.exports = {\n  ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n  secondsToVideoTs: secondsToVideoTs,\n  secondsToAudioTs: secondsToAudioTs,\n  videoTsToSeconds: videoTsToSeconds,\n  audioTsToSeconds: audioTsToSeconds,\n  audioTsToVideoTs: audioTsToVideoTs,\n  videoTsToAudioTs: videoTsToAudioTs,\n  metadataTsToSeconds: metadataTsToSeconds\n};\n","function _getPrototypeOf(o) {\n  module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) {\n    return o.__proto__ || Object.getPrototypeOf(o);\n  }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  return _getPrototypeOf(o);\n}\nmodule.exports = _getPrototypeOf, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","function _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n  return self;\n}\nmodule.exports = _assertThisInitialized, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","function _setPrototypeOf(o, p) {\n  module.exports = _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  return _setPrototypeOf(o, p);\n}\nmodule.exports = _setPrototypeOf, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","var setPrototypeOf = require(\"./setPrototypeOf.js\");\nfunction _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n  setPrototypeOf(subClass, superClass);\n}\nmodule.exports = _inheritsLoose, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","import URLToolkit from 'url-toolkit';\nimport window from 'global/window';\nvar DEFAULT_LOCATION = 'http://example.com';\n\nvar resolveUrl = function resolveUrl(baseUrl, relativeUrl) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeUrl)) {\n    return relativeUrl;\n  } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location\n\n\n  if (/^data:/.test(baseUrl)) {\n    baseUrl = window.location && window.location.href || '';\n  } // IE11 supports URL but not the URL constructor\n  // feature detect the behavior we want\n\n\n  var nativeURL = typeof window.URL === 'function';\n  var protocolLess = /^\\/\\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)\n  // and if baseUrl isn't an absolute url\n\n  var removeLocation = !window.location && !/\\/\\//i.test(baseUrl); // if the base URL is relative then combine with the current location\n\n  if (nativeURL) {\n    baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION);\n  } else if (!/\\/\\//i.test(baseUrl)) {\n    baseUrl = URLToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);\n  }\n\n  if (nativeURL) {\n    var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol\n    // and if we're location-less, remove the location\n    // otherwise, return the url unmodified\n\n    if (removeLocation) {\n      return newUrl.href.slice(DEFAULT_LOCATION.length);\n    } else if (protocolLess) {\n      return newUrl.href.slice(newUrl.protocol.length);\n    }\n\n    return newUrl.href;\n  }\n\n  return URLToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n};\n\nexport default resolveUrl;","'use strict';\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar clearErrorStack = require('../internals/error-stack-clear');\nvar ERROR_STACK_INSTALLABLE = require('../internals/error-stack-installable');\n\n// non-standard V8\nvar captureStackTrace = Error.captureStackTrace;\n\nmodule.exports = function (error, C, stack, dropEntries) {\n  if (ERROR_STACK_INSTALLABLE) {\n    if (captureStackTrace) captureStackTrace(error, C);\n    else createNonEnumerableProperty(error, 'stack', clearErrorStack(stack, dropEntries));\n  }\n};\n","function _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n  try {\n    Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\nmodule.exports = _isNativeReflectConstruct, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","var getUint64 = require('../utils/numbers.js').getUint64;\n\nvar parseSidx = function(data) {\n  var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n      result = {\n        version: data[0],\n        flags: new Uint8Array(data.subarray(1, 4)),\n        references: [],\n        referenceId: view.getUint32(4),\n        timescale: view.getUint32(8)\n      },\n    i = 12;\n\n  if (result.version === 0) {\n    result.earliestPresentationTime = view.getUint32(i);\n    result.firstOffset = view.getUint32(i + 4);\n    i += 8;\n  } else {\n    // read 64 bits\n    result.earliestPresentationTime = getUint64(data.subarray(i));\n    result.firstOffset = getUint64(data.subarray(i + 8));\n    i += 16;\n  }\n\n  i += 2; // reserved\n\n  var referenceCount = view.getUint16(i);\n\n  i += 2; // start of references\n\n  for (; referenceCount > 0; i += 12, referenceCount--) {\n    result.references.push({\n      referenceType: (data[i] & 0x80) >>> 7,\n      referencedSize: view.getUint32(i) & 0x7FFFFFFF,\n      subsegmentDuration: view.getUint32(i + 4),\n      startsWithSap: !!(data[i + 8] & 0x80),\n      sapType: (data[i + 8] & 0x70) >>> 4,\n      sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF\n    });\n  }\n\n  return result;\n};\n\n\nmodule.exports = parseSidx;\n","module.exports = isFunction\n\nvar toString = Object.prototype.toString\n\nfunction isFunction (fn) {\n  if (!fn) {\n    return false\n  }\n  var string = toString.call(fn)\n  return string === '[object Function]' ||\n    (typeof fn === 'function' && string !== '[object RegExp]') ||\n    (typeof window !== 'undefined' &&\n     // IE8 and below\n     (fn === window.setTimeout ||\n      fn === window.alert ||\n      fn === window.confirm ||\n      fn === window.prompt))\n};\n","/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {string[]} groups\n *        The media groups to call the callback for\n * @param {Function} callback\n *        Callback to call for each media group\n */\nexport var forEachMediaGroup = function forEachMediaGroup(master, groups, callback) {\n  groups.forEach(function (mediaType) {\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};","/*! @name mpd-parser @version 0.22.1 @license Apache-2.0 */\nimport resolveUrl from '@videojs/vhs-utils/es/resolve-url';\nimport window from 'global/window';\nimport { forEachMediaGroup } from '@videojs/vhs-utils/es/media-groups';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array';\nimport { DOMParser } from '@xmldom/xmldom';\n\nvar version = \"0.22.1\";\n\nvar isObject = function isObject(obj) {\n  return !!obj && typeof obj === 'object';\n};\n\nvar merge = function merge() {\n  for (var _len = arguments.length, objects = new Array(_len), _key = 0; _key < _len; _key++) {\n    objects[_key] = arguments[_key];\n  }\n\n  return objects.reduce(function (result, source) {\n    if (typeof source !== 'object') {\n      return result;\n    }\n\n    Object.keys(source).forEach(function (key) {\n      if (Array.isArray(result[key]) && Array.isArray(source[key])) {\n        result[key] = result[key].concat(source[key]);\n      } else if (isObject(result[key]) && isObject(source[key])) {\n        result[key] = merge(result[key], source[key]);\n      } else {\n        result[key] = source[key];\n      }\n    });\n    return result;\n  }, {});\n};\nvar values = function values(o) {\n  return Object.keys(o).map(function (k) {\n    return o[k];\n  });\n};\n\nvar range = function range(start, end) {\n  var result = [];\n\n  for (var i = start; i < end; i++) {\n    result.push(i);\n  }\n\n  return result;\n};\nvar flatten = function flatten(lists) {\n  return lists.reduce(function (x, y) {\n    return x.concat(y);\n  }, []);\n};\nvar from = function from(list) {\n  if (!list.length) {\n    return [];\n  }\n\n  var result = [];\n\n  for (var i = 0; i < list.length; i++) {\n    result.push(list[i]);\n  }\n\n  return result;\n};\nvar findIndexes = function findIndexes(l, key) {\n  return l.reduce(function (a, e, i) {\n    if (e[key]) {\n      a.push(i);\n    }\n\n    return a;\n  }, []);\n};\n/**\n * Returns the first index that satisfies the matching function, or -1 if not found.\n *\n * Only necessary because of IE11 support.\n *\n * @param {Array} list - the list to search through\n * @param {Function} matchingFunction - the matching function\n *\n * @return {number} the matching index or -1 if not found\n */\n\nvar findIndex = function findIndex(list, matchingFunction) {\n  for (var i = 0; i < list.length; i++) {\n    if (matchingFunction(list[i])) {\n      return i;\n    }\n  }\n\n  return -1;\n};\n/**\n * Returns a union of the included lists provided each element can be identified by a key.\n *\n * @param {Array} list - list of lists to get the union of\n * @param {Function} keyFunction - the function to use as a key for each element\n *\n * @return {Array} the union of the arrays\n */\n\nvar union = function union(lists, keyFunction) {\n  return values(lists.reduce(function (acc, list) {\n    list.forEach(function (el) {\n      acc[keyFunction(el)] = el;\n    });\n    return acc;\n  }, {}));\n};\n\nvar errors = {\n  INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',\n  DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',\n  DASH_INVALID_XML: 'DASH_INVALID_XML',\n  NO_BASE_URL: 'NO_BASE_URL',\n  MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',\n  SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',\n  UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'\n};\n\n/**\n * @typedef {Object} SingleUri\n * @property {string} uri - relative location of segment\n * @property {string} resolvedUri - resolved location of segment\n * @property {Object} byterange - Object containing information on how to make byte range\n *   requests following byte-range-spec per RFC2616.\n * @property {String} byterange.length - length of range request\n * @property {String} byterange.offset - byte offset of range request\n *\n * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1\n */\n\n/**\n * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object\n * that conforms to how m3u8-parser is structured\n *\n * @see https://github.com/videojs/m3u8-parser\n *\n * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes\n * @param {string} source - source url for segment\n * @param {string} range - optional range used for range calls,\n *   follows  RFC 2616, Clause 14.35.1\n * @return {SingleUri} full segment information transformed into a format similar\n *   to m3u8-parser\n */\n\nvar urlTypeToSegment = function urlTypeToSegment(_ref) {\n  var _ref$baseUrl = _ref.baseUrl,\n      baseUrl = _ref$baseUrl === void 0 ? '' : _ref$baseUrl,\n      _ref$source = _ref.source,\n      source = _ref$source === void 0 ? '' : _ref$source,\n      _ref$range = _ref.range,\n      range = _ref$range === void 0 ? '' : _ref$range,\n      _ref$indexRange = _ref.indexRange,\n      indexRange = _ref$indexRange === void 0 ? '' : _ref$indexRange;\n  var segment = {\n    uri: source,\n    resolvedUri: resolveUrl(baseUrl || '', source)\n  };\n\n  if (range || indexRange) {\n    var rangeStr = range ? range : indexRange;\n    var ranges = rangeStr.split('-'); // default to parsing this as a BigInt if possible\n\n    var startRange = window.BigInt ? window.BigInt(ranges[0]) : parseInt(ranges[0], 10);\n    var endRange = window.BigInt ? window.BigInt(ranges[1]) : parseInt(ranges[1], 10); // convert back to a number if less than MAX_SAFE_INTEGER\n\n    if (startRange < Number.MAX_SAFE_INTEGER && typeof startRange === 'bigint') {\n      startRange = Number(startRange);\n    }\n\n    if (endRange < Number.MAX_SAFE_INTEGER && typeof endRange === 'bigint') {\n      endRange = Number(endRange);\n    }\n\n    var length;\n\n    if (typeof endRange === 'bigint' || typeof startRange === 'bigint') {\n      length = window.BigInt(endRange) - window.BigInt(startRange) + window.BigInt(1);\n    } else {\n      length = endRange - startRange + 1;\n    }\n\n    if (typeof length === 'bigint' && length < Number.MAX_SAFE_INTEGER) {\n      length = Number(length);\n    } // byterange should be inclusive according to\n    // RFC 2616, Clause 14.35.1\n\n\n    segment.byterange = {\n      length: length,\n      offset: startRange\n    };\n  }\n\n  return segment;\n};\nvar byteRangeToString = function byteRangeToString(byterange) {\n  // `endRange` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var endRange;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    endRange = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);\n  } else {\n    endRange = byterange.offset + byterange.length - 1;\n  }\n\n  return byterange.offset + \"-\" + endRange;\n};\n\n/**\n * parse the end number attribue that can be a string\n * number, or undefined.\n *\n * @param {string|number|undefined} endNumber\n *        The end number attribute.\n *\n * @return {number|null}\n *          The result of parsing the end number.\n */\n\nvar parseEndNumber = function parseEndNumber(endNumber) {\n  if (endNumber && typeof endNumber !== 'number') {\n    endNumber = parseInt(endNumber, 10);\n  }\n\n  if (isNaN(endNumber)) {\n    return null;\n  }\n\n  return endNumber;\n};\n/**\n * Functions for calculating the range of available segments in static and dynamic\n * manifests.\n */\n\n\nvar segmentRange = {\n  /**\n   * Returns the entire range of available segments for a static MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  static: function _static(attributes) {\n    var duration = attributes.duration,\n        _attributes$timescale = attributes.timescale,\n        timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n        sourceDuration = attributes.sourceDuration,\n        periodDuration = attributes.periodDuration;\n    var endNumber = parseEndNumber(attributes.endNumber);\n    var segmentDuration = duration / timescale;\n\n    if (typeof endNumber === 'number') {\n      return {\n        start: 0,\n        end: endNumber\n      };\n    }\n\n    if (typeof periodDuration === 'number') {\n      return {\n        start: 0,\n        end: periodDuration / segmentDuration\n      };\n    }\n\n    return {\n      start: 0,\n      end: sourceDuration / segmentDuration\n    };\n  },\n\n  /**\n   * Returns the current live window range of available segments for a dynamic MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  dynamic: function dynamic(attributes) {\n    var NOW = attributes.NOW,\n        clientOffset = attributes.clientOffset,\n        availabilityStartTime = attributes.availabilityStartTime,\n        _attributes$timescale2 = attributes.timescale,\n        timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n        duration = attributes.duration,\n        _attributes$periodSta = attributes.periodStart,\n        periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n        _attributes$minimumUp = attributes.minimumUpdatePeriod,\n        minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp,\n        _attributes$timeShift = attributes.timeShiftBufferDepth,\n        timeShiftBufferDepth = _attributes$timeShift === void 0 ? Infinity : _attributes$timeShift;\n    var endNumber = parseEndNumber(attributes.endNumber); // clientOffset is passed in at the top level of mpd-parser and is an offset calculated\n    // after retrieving UTC server time.\n\n    var now = (NOW + clientOffset) / 1000; // WC stands for Wall Clock.\n    // Convert the period start time to EPOCH.\n\n    var periodStartWC = availabilityStartTime + periodStart; // Period end in EPOCH is manifest's retrieval time + time until next update.\n\n    var periodEndWC = now + minimumUpdatePeriod;\n    var periodDuration = periodEndWC - periodStartWC;\n    var segmentCount = Math.ceil(periodDuration * timescale / duration);\n    var availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);\n    var availableEnd = Math.floor((now - periodStartWC) * timescale / duration);\n    return {\n      start: Math.max(0, availableStart),\n      end: typeof endNumber === 'number' ? endNumber : Math.min(segmentCount, availableEnd)\n    };\n  }\n};\n/**\n * Maps a range of numbers to objects with information needed to build the corresponding\n * segment list\n *\n * @name toSegmentsCallback\n * @function\n * @param {number} number\n *        Number of the segment\n * @param {number} index\n *        Index of the number in the range list\n * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}\n *         Object with segment timing and duration info\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping a range of numbers to\n * information needed to build the segment list.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {toSegmentsCallback}\n *         Callback map function\n */\n\nvar toSegments = function toSegments(attributes) {\n  return function (number) {\n    var duration = attributes.duration,\n        _attributes$timescale3 = attributes.timescale,\n        timescale = _attributes$timescale3 === void 0 ? 1 : _attributes$timescale3,\n        periodStart = attributes.periodStart,\n        _attributes$startNumb = attributes.startNumber,\n        startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb;\n    return {\n      number: startNumber + number,\n      duration: duration / timescale,\n      timeline: periodStart,\n      time: number * duration\n    };\n  };\n};\n/**\n * Returns a list of objects containing segment timing and duration info used for\n * building the list of segments. This uses the @duration attribute specified\n * in the MPD manifest to derive the range of segments.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseByDuration = function parseByDuration(attributes) {\n  var type = attributes.type,\n      duration = attributes.duration,\n      _attributes$timescale4 = attributes.timescale,\n      timescale = _attributes$timescale4 === void 0 ? 1 : _attributes$timescale4,\n      periodDuration = attributes.periodDuration,\n      sourceDuration = attributes.sourceDuration;\n\n  var _segmentRange$type = segmentRange[type](attributes),\n      start = _segmentRange$type.start,\n      end = _segmentRange$type.end;\n\n  var segments = range(start, end).map(toSegments(attributes));\n\n  if (type === 'static') {\n    var index = segments.length - 1; // section is either a period or the full source\n\n    var sectionDuration = typeof periodDuration === 'number' ? periodDuration : sourceDuration; // final segment may be less than full segment duration\n\n    segments[index].duration = sectionDuration - duration / timescale * index;\n  }\n\n  return segments;\n};\n\n/**\n * Translates SegmentBase into a set of segments.\n * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @return {Object.<Array>} list of segments\n */\n\nvar segmentsFromBase = function segmentsFromBase(attributes) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$indexRang = attributes.indexRange,\n      indexRange = _attributes$indexRang === void 0 ? '' : _attributes$indexRang,\n      periodStart = attributes.periodStart,\n      presentationTime = attributes.presentationTime,\n      _attributes$number = attributes.number,\n      number = _attributes$number === void 0 ? 0 : _attributes$number,\n      duration = attributes.duration; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)\n\n  if (!baseUrl) {\n    throw new Error(errors.NO_BASE_URL);\n  }\n\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: baseUrl,\n    indexRange: indexRange\n  });\n  segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source\n  // (since SegmentBase is only for one total segment)\n\n  if (duration) {\n    var segmentTimeInfo = parseByDuration(attributes);\n\n    if (segmentTimeInfo.length) {\n      segment.duration = segmentTimeInfo[0].duration;\n      segment.timeline = segmentTimeInfo[0].timeline;\n    }\n  } else if (sourceDuration) {\n    segment.duration = sourceDuration;\n    segment.timeline = periodStart;\n  } // If presentation time is provided, these segments are being generated by SIDX\n  // references, and should use the time provided. For the general case of SegmentBase,\n  // there should only be one segment in the period, so its presentation time is the same\n  // as its period start.\n\n\n  segment.presentationTime = presentationTime || periodStart;\n  segment.number = number;\n  return [segment];\n};\n/**\n * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist\n * according to the sidx information given.\n *\n * playlist.sidx has metadadata about the sidx where-as the sidx param\n * is the parsed sidx box itself.\n *\n * @param {Object} playlist the playlist to update the sidx information for\n * @param {Object} sidx the parsed sidx box\n * @return {Object} the playlist object with the updated sidx information\n */\n\nvar addSidxSegmentsToPlaylist$1 = function addSidxSegmentsToPlaylist(playlist, sidx, baseUrl) {\n  // Retain init segment information\n  var initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial main manifest parsing\n\n  var sourceDuration = playlist.sidx.duration; // Retain source timeline\n\n  var timeline = playlist.timeline || 0;\n  var sidxByteRange = playlist.sidx.byterange;\n  var sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx\n\n  var timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes\n\n  var mediaReferences = sidx.references.filter(function (r) {\n    return r.referenceType !== 1;\n  });\n  var segments = [];\n  var type = playlist.endList ? 'static' : 'dynamic';\n  var periodStart = playlist.sidx.timeline;\n  var presentationTime = periodStart;\n  var number = playlist.mediaSequence || 0; // firstOffset is the offset from the end of the sidx box\n\n  var startIndex; // eslint-disable-next-line\n\n  if (typeof sidx.firstOffset === 'bigint') {\n    startIndex = window.BigInt(sidxEnd) + sidx.firstOffset;\n  } else {\n    startIndex = sidxEnd + sidx.firstOffset;\n  }\n\n  for (var i = 0; i < mediaReferences.length; i++) {\n    var reference = sidx.references[i]; // size of the referenced (sub)segment\n\n    var size = reference.referencedSize; // duration of the referenced (sub)segment, in  the  timescale\n    // this will be converted to seconds when generating segments\n\n    var duration = reference.subsegmentDuration; // should be an inclusive range\n\n    var endIndex = void 0; // eslint-disable-next-line\n\n    if (typeof startIndex === 'bigint') {\n      endIndex = startIndex + window.BigInt(size) - window.BigInt(1);\n    } else {\n      endIndex = startIndex + size - 1;\n    }\n\n    var indexRange = startIndex + \"-\" + endIndex;\n    var attributes = {\n      baseUrl: baseUrl,\n      timescale: timescale,\n      timeline: timeline,\n      periodStart: periodStart,\n      presentationTime: presentationTime,\n      number: number,\n      duration: duration,\n      sourceDuration: sourceDuration,\n      indexRange: indexRange,\n      type: type\n    };\n    var segment = segmentsFromBase(attributes)[0];\n\n    if (initSegment) {\n      segment.map = initSegment;\n    }\n\n    segments.push(segment);\n\n    if (typeof startIndex === 'bigint') {\n      startIndex += window.BigInt(size);\n    } else {\n      startIndex += size;\n    }\n\n    presentationTime += duration / timescale;\n    number++;\n  }\n\n  playlist.segments = segments;\n  return playlist;\n};\n\nvar SUPPORTED_MEDIA_TYPES = ['AUDIO', 'SUBTITLES']; // allow one 60fps frame as leniency (arbitrarily chosen)\n\nvar TIME_FUDGE = 1 / 60;\n/**\n * Given a list of timelineStarts, combines, dedupes, and sorts them.\n *\n * @param {TimelineStart[]} timelineStarts - list of timeline starts\n *\n * @return {TimelineStart[]} the combined and deduped timeline starts\n */\n\nvar getUniqueTimelineStarts = function getUniqueTimelineStarts(timelineStarts) {\n  return union(timelineStarts, function (_ref) {\n    var timeline = _ref.timeline;\n    return timeline;\n  }).sort(function (a, b) {\n    return a.timeline > b.timeline ? 1 : -1;\n  });\n};\n/**\n * Finds the playlist with the matching NAME attribute.\n *\n * @param {Array} playlists - playlists to search through\n * @param {string} name - the NAME attribute to search for\n *\n * @return {Object|null} the matching playlist object, or null\n */\n\nvar findPlaylistWithName = function findPlaylistWithName(playlists, name) {\n  for (var i = 0; i < playlists.length; i++) {\n    if (playlists[i].attributes.NAME === name) {\n      return playlists[i];\n    }\n  }\n\n  return null;\n};\n/**\n * Gets a flattened array of media group playlists.\n *\n * @param {Object} manifest - the main manifest object\n *\n * @return {Array} the media group playlists\n */\n\nvar getMediaGroupPlaylists = function getMediaGroupPlaylists(manifest) {\n  var mediaGroupPlaylists = [];\n  forEachMediaGroup(manifest, SUPPORTED_MEDIA_TYPES, function (properties, type, group, label) {\n    mediaGroupPlaylists = mediaGroupPlaylists.concat(properties.playlists || []);\n  });\n  return mediaGroupPlaylists;\n};\n/**\n * Updates the playlist's media sequence numbers.\n *\n * @param {Object} config - options object\n * @param {Object} config.playlist - the playlist to update\n * @param {number} config.mediaSequence - the mediaSequence number to start with\n */\n\nvar updateMediaSequenceForPlaylist = function updateMediaSequenceForPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      mediaSequence = _ref2.mediaSequence;\n  playlist.mediaSequence = mediaSequence;\n  playlist.segments.forEach(function (segment, index) {\n    segment.number = playlist.mediaSequence + index;\n  });\n};\n/**\n * Updates the media and discontinuity sequence numbers of newPlaylists given oldPlaylists\n * and a complete list of timeline starts.\n *\n * If no matching playlist is found, only the discontinuity sequence number of the playlist\n * will be updated.\n *\n * Since early available timelines are not supported, at least one segment must be present.\n *\n * @param {Object} config - options object\n * @param {Object[]} oldPlaylists - the old playlists to use as a reference\n * @param {Object[]} newPlaylists - the new playlists to update\n * @param {Object} timelineStarts - all timelineStarts seen in the stream to this point\n */\n\nvar updateSequenceNumbers = function updateSequenceNumbers(_ref3) {\n  var oldPlaylists = _ref3.oldPlaylists,\n      newPlaylists = _ref3.newPlaylists,\n      timelineStarts = _ref3.timelineStarts;\n  newPlaylists.forEach(function (playlist) {\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref4) {\n      var timeline = _ref4.timeline;\n      return timeline === playlist.timeline;\n    }); // Playlists NAMEs come from DASH Representation IDs, which are mandatory\n    // (see ISO_23009-1-2012 5.3.5.2).\n    //\n    // If the same Representation existed in a prior Period, it will retain the same NAME.\n\n    var oldPlaylist = findPlaylistWithName(oldPlaylists, playlist.attributes.NAME);\n\n    if (!oldPlaylist) {\n      // Since this is a new playlist, the media sequence values can start from 0 without\n      // consequence.\n      return;\n    } // TODO better support for live SIDX\n    //\n    // As of this writing, mpd-parser does not support multiperiod SIDX (in live or VOD).\n    // This is evident by a playlist only having a single SIDX reference. In a multiperiod\n    // playlist there would need to be multiple SIDX references. In addition, live SIDX is\n    // not supported when the SIDX properties change on refreshes.\n    //\n    // In the future, if support needs to be added, the merging logic here can be called\n    // after SIDX references are resolved. For now, exit early to prevent exceptions being\n    // thrown due to undefined references.\n\n\n    if (playlist.sidx) {\n      return;\n    } // Since we don't yet support early available timelines, we don't need to support\n    // playlists with no segments.\n\n\n    var firstNewSegment = playlist.segments[0];\n    var oldMatchingSegmentIndex = findIndex(oldPlaylist.segments, function (oldSegment) {\n      return Math.abs(oldSegment.presentationTime - firstNewSegment.presentationTime) < TIME_FUDGE;\n    }); // No matching segment from the old playlist means the entire playlist was refreshed.\n    // In this case the media sequence should account for this update, and the new segments\n    // should be marked as discontinuous from the prior content, since the last prior\n    // timeline was removed.\n\n    if (oldMatchingSegmentIndex === -1) {\n      updateMediaSequenceForPlaylist({\n        playlist: playlist,\n        mediaSequence: oldPlaylist.mediaSequence + oldPlaylist.segments.length\n      });\n      playlist.segments[0].discontinuity = true;\n      playlist.discontinuityStarts.unshift(0); // No matching segment does not necessarily mean there's missing content.\n      //\n      // If the new playlist's timeline is the same as the last seen segment's timeline,\n      // then a discontinuity can be added to identify that there's potentially missing\n      // content. If there's no missing content, the discontinuity should still be rather\n      // harmless. It's possible that if segment durations are accurate enough, that the\n      // existence of a gap can be determined using the presentation times and durations,\n      // but if the segment timing info is off, it may introduce more problems than simply\n      // adding the discontinuity.\n      //\n      // If the new playlist's timeline is different from the last seen segment's timeline,\n      // then a discontinuity can be added to identify that this is the first seen segment\n      // of a new timeline. However, the logic at the start of this function that\n      // determined the disconinuity sequence by timeline index is now off by one (the\n      // discontinuity of the newest timeline hasn't yet fallen off the manifest...since\n      // we added it), so the disconinuity sequence must be decremented.\n      //\n      // A period may also have a duration of zero, so the case of no segments is handled\n      // here even though we don't yet support early available periods.\n\n      if (!oldPlaylist.segments.length && playlist.timeline > oldPlaylist.timeline || oldPlaylist.segments.length && playlist.timeline > oldPlaylist.segments[oldPlaylist.segments.length - 1].timeline) {\n        playlist.discontinuitySequence--;\n      }\n\n      return;\n    } // If the first segment matched with a prior segment on a discontinuity (it's matching\n    // on the first segment of a period), then the discontinuitySequence shouldn't be the\n    // timeline's matching one, but instead should be the one prior, and the first segment\n    // of the new manifest should be marked with a discontinuity.\n    //\n    // The reason for this special case is that discontinuity sequence shows how many\n    // discontinuities have fallen off of the playlist, and discontinuities are marked on\n    // the first segment of a new \"timeline.\" Because of this, while DASH will retain that\n    // Period while the \"timeline\" exists, HLS keeps track of it via the discontinuity\n    // sequence, and that first segment is an indicator, but can be removed before that\n    // timeline is gone.\n\n\n    var oldMatchingSegment = oldPlaylist.segments[oldMatchingSegmentIndex];\n\n    if (oldMatchingSegment.discontinuity && !firstNewSegment.discontinuity) {\n      firstNewSegment.discontinuity = true;\n      playlist.discontinuityStarts.unshift(0);\n      playlist.discontinuitySequence--;\n    }\n\n    updateMediaSequenceForPlaylist({\n      playlist: playlist,\n      mediaSequence: oldPlaylist.segments[oldMatchingSegmentIndex].number\n    });\n  });\n};\n/**\n * Given an old parsed manifest object and a new parsed manifest object, updates the\n * sequence and timing values within the new manifest to ensure that it lines up with the\n * old.\n *\n * @param {Array} oldManifest - the old main manifest object\n * @param {Array} newManifest - the new main manifest object\n *\n * @return {Object} the updated new manifest object\n */\n\nvar positionManifestOnTimeline = function positionManifestOnTimeline(_ref5) {\n  var oldManifest = _ref5.oldManifest,\n      newManifest = _ref5.newManifest;\n  // Starting from v4.1.2 of the IOP, section 4.4.3.3 states:\n  //\n  // \"MPD@availabilityStartTime and Period@start shall not be changed over MPD updates.\"\n  //\n  // This was added from https://github.com/Dash-Industry-Forum/DASH-IF-IOP/issues/160\n  //\n  // Because of this change, and the difficulty of supporting periods with changing start\n  // times, periods with changing start times are not supported. This makes the logic much\n  // simpler, since periods with the same start time can be considerred the same period\n  // across refreshes.\n  //\n  // To give an example as to the difficulty of handling periods where the start time may\n  // change, if a single period manifest is refreshed with another manifest with a single\n  // period, and both the start and end times are increased, then the only way to determine\n  // if it's a new period or an old one that has changed is to look through the segments of\n  // each playlist and determine the presentation time bounds to find a match. In addition,\n  // if the period start changed to exceed the old period end, then there would be no\n  // match, and it would not be possible to determine whether the refreshed period is a new\n  // one or the old one.\n  var oldPlaylists = oldManifest.playlists.concat(getMediaGroupPlaylists(oldManifest));\n  var newPlaylists = newManifest.playlists.concat(getMediaGroupPlaylists(newManifest)); // Save all seen timelineStarts to the new manifest. Although this potentially means that\n  // there's a \"memory leak\" in that it will never stop growing, in reality, only a couple\n  // of properties are saved for each seen Period. Even long running live streams won't\n  // generate too many Periods, unless the stream is watched for decades. In the future,\n  // this can be optimized by mapping to discontinuity sequence numbers for each timeline,\n  // but it may not become an issue, and the additional info can be useful for debugging.\n\n  newManifest.timelineStarts = getUniqueTimelineStarts([oldManifest.timelineStarts, newManifest.timelineStarts]);\n  updateSequenceNumbers({\n    oldPlaylists: oldPlaylists,\n    newPlaylists: newPlaylists,\n    timelineStarts: newManifest.timelineStarts\n  });\n  return newManifest;\n};\n\nvar generateSidxKey = function generateSidxKey(sidx) {\n  return sidx && sidx.uri + '-' + byteRangeToString(sidx.byterange);\n};\n\nvar mergeDiscontiguousPlaylists = function mergeDiscontiguousPlaylists(playlists) {\n  var mergedPlaylists = values(playlists.reduce(function (acc, playlist) {\n    // assuming playlist IDs are the same across periods\n    // TODO: handle multiperiod where representation sets are not the same\n    // across periods\n    var name = playlist.attributes.id + (playlist.attributes.lang || '');\n\n    if (!acc[name]) {\n      // First Period\n      acc[name] = playlist;\n      acc[name].attributes.timelineStarts = [];\n    } else {\n      // Subsequent Periods\n      if (playlist.segments) {\n        var _acc$name$segments;\n\n        // first segment of subsequent periods signal a discontinuity\n        if (playlist.segments[0]) {\n          playlist.segments[0].discontinuity = true;\n        }\n\n        (_acc$name$segments = acc[name].segments).push.apply(_acc$name$segments, playlist.segments);\n      } // bubble up contentProtection, this assumes all DRM content\n      // has the same contentProtection\n\n\n      if (playlist.attributes.contentProtection) {\n        acc[name].attributes.contentProtection = playlist.attributes.contentProtection;\n      }\n    }\n\n    acc[name].attributes.timelineStarts.push({\n      // Although they represent the same number, it's important to have both to make it\n      // compatible with HLS potentially having a similar attribute.\n      start: playlist.attributes.periodStart,\n      timeline: playlist.attributes.periodStart\n    });\n    return acc;\n  }, {}));\n  return mergedPlaylists.map(function (playlist) {\n    playlist.discontinuityStarts = findIndexes(playlist.segments || [], 'discontinuity');\n    return playlist;\n  });\n};\n\nvar addSidxSegmentsToPlaylist = function addSidxSegmentsToPlaylist(playlist, sidxMapping) {\n  var sidxKey = generateSidxKey(playlist.sidx);\n  var sidxMatch = sidxKey && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;\n\n  if (sidxMatch) {\n    addSidxSegmentsToPlaylist$1(playlist, sidxMatch, playlist.sidx.resolvedUri);\n  }\n\n  return playlist;\n};\nvar addSidxSegmentsToPlaylists = function addSidxSegmentsToPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (!Object.keys(sidxMapping).length) {\n    return playlists;\n  }\n\n  for (var i in playlists) {\n    playlists[i] = addSidxSegmentsToPlaylist(playlists[i], sidxMapping);\n  }\n\n  return playlists;\n};\nvar formatAudioPlaylist = function formatAudioPlaylist(_ref, isAudioOnly) {\n  var _attributes;\n\n  var attributes = _ref.attributes,\n      segments = _ref.segments,\n      sidx = _ref.sidx,\n      mediaSequence = _ref.mediaSequence,\n      discontinuitySequence = _ref.discontinuitySequence,\n      discontinuityStarts = _ref.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes = {\n      NAME: attributes.id,\n      BANDWIDTH: attributes.bandwidth,\n      CODECS: attributes.codecs\n    }, _attributes['PROGRAM-ID'] = 1, _attributes),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuitySequence: discontinuitySequence,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  if (isAudioOnly) {\n    playlist.attributes.AUDIO = 'audio';\n    playlist.attributes.SUBTITLES = 'subs';\n  }\n\n  return playlist;\n};\nvar formatVttPlaylist = function formatVttPlaylist(_ref2) {\n  var _m3u8Attributes;\n\n  var attributes = _ref2.attributes,\n      segments = _ref2.segments,\n      mediaSequence = _ref2.mediaSequence,\n      discontinuityStarts = _ref2.discontinuityStarts,\n      discontinuitySequence = _ref2.discontinuitySequence;\n\n  if (typeof segments === 'undefined') {\n    // vtt tracks may use single file in BaseURL\n    segments = [{\n      uri: attributes.baseUrl,\n      timeline: attributes.periodStart,\n      resolvedUri: attributes.baseUrl || '',\n      duration: attributes.sourceDuration,\n      number: 0\n    }]; // targetDuration should be the same duration as the only segment\n\n    attributes.duration = attributes.sourceDuration;\n  }\n\n  var m3u8Attributes = (_m3u8Attributes = {\n    NAME: attributes.id,\n    BANDWIDTH: attributes.bandwidth\n  }, _m3u8Attributes['PROGRAM-ID'] = 1, _m3u8Attributes);\n\n  if (attributes.codecs) {\n    m3u8Attributes.CODECS = attributes.codecs;\n  }\n\n  return {\n    attributes: m3u8Attributes,\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: attributes.baseUrl || '',\n    targetDuration: attributes.duration,\n    timelineStarts: attributes.timelineStarts,\n    discontinuityStarts: discontinuityStarts,\n    discontinuitySequence: discontinuitySequence,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n};\nvar organizeAudioPlaylists = function organizeAudioPlaylists(playlists, sidxMapping, isAudioOnly) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (isAudioOnly === void 0) {\n    isAudioOnly = false;\n  }\n\n  var mainPlaylist;\n  var formattedPlaylists = playlists.reduce(function (a, playlist) {\n    var role = playlist.attributes.role && playlist.attributes.role.value || '';\n    var language = playlist.attributes.lang || '';\n    var label = playlist.attributes.label || 'main';\n\n    if (language && !playlist.attributes.label) {\n      var roleLabel = role ? \" (\" + role + \")\" : '';\n      label = \"\" + playlist.attributes.lang + roleLabel;\n    }\n\n    if (!a[label]) {\n      a[label] = {\n        language: language,\n        autoselect: true,\n        default: role === 'main',\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    var formatted = addSidxSegmentsToPlaylist(formatAudioPlaylist(playlist, isAudioOnly), sidxMapping);\n    a[label].playlists.push(formatted);\n\n    if (typeof mainPlaylist === 'undefined' && role === 'main') {\n      mainPlaylist = playlist;\n      mainPlaylist.default = true;\n    }\n\n    return a;\n  }, {}); // if no playlists have role \"main\", mark the first as main\n\n  if (!mainPlaylist) {\n    var firstLabel = Object.keys(formattedPlaylists)[0];\n    formattedPlaylists[firstLabel].default = true;\n  }\n\n  return formattedPlaylists;\n};\nvar organizeVttPlaylists = function organizeVttPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  return playlists.reduce(function (a, playlist) {\n    var label = playlist.attributes.lang || 'text';\n\n    if (!a[label]) {\n      a[label] = {\n        language: label,\n        default: false,\n        autoselect: false,\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    a[label].playlists.push(addSidxSegmentsToPlaylist(formatVttPlaylist(playlist), sidxMapping));\n    return a;\n  }, {});\n};\n\nvar organizeCaptionServices = function organizeCaptionServices(captionServices) {\n  return captionServices.reduce(function (svcObj, svc) {\n    if (!svc) {\n      return svcObj;\n    }\n\n    svc.forEach(function (service) {\n      var channel = service.channel,\n          language = service.language;\n      svcObj[language] = {\n        autoselect: false,\n        default: false,\n        instreamId: channel,\n        language: language\n      };\n\n      if (service.hasOwnProperty('aspectRatio')) {\n        svcObj[language].aspectRatio = service.aspectRatio;\n      }\n\n      if (service.hasOwnProperty('easyReader')) {\n        svcObj[language].easyReader = service.easyReader;\n      }\n\n      if (service.hasOwnProperty('3D')) {\n        svcObj[language]['3D'] = service['3D'];\n      }\n    });\n    return svcObj;\n  }, {});\n};\n\nvar formatVideoPlaylist = function formatVideoPlaylist(_ref3) {\n  var _attributes2;\n\n  var attributes = _ref3.attributes,\n      segments = _ref3.segments,\n      sidx = _ref3.sidx,\n      discontinuityStarts = _ref3.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes2 = {\n      NAME: attributes.id,\n      AUDIO: 'audio',\n      SUBTITLES: 'subs',\n      RESOLUTION: {\n        width: attributes.width,\n        height: attributes.height\n      },\n      CODECS: attributes.codecs,\n      BANDWIDTH: attributes.bandwidth\n    }, _attributes2['PROGRAM-ID'] = 1, _attributes2),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    segments: segments\n  };\n\n  if (attributes.frameRate) {\n    playlist.attributes['FRAME-RATE'] = attributes.frameRate;\n  }\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  return playlist;\n};\n\nvar videoOnly = function videoOnly(_ref4) {\n  var attributes = _ref4.attributes;\n  return attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';\n};\n\nvar audioOnly = function audioOnly(_ref5) {\n  var attributes = _ref5.attributes;\n  return attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';\n};\n\nvar vttOnly = function vttOnly(_ref6) {\n  var attributes = _ref6.attributes;\n  return attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';\n};\n/**\n * Contains start and timeline properties denoting a timeline start. For DASH, these will\n * be the same number.\n *\n * @typedef {Object} TimelineStart\n * @property {number} start - the start time of the timeline\n * @property {number} timeline - the timeline number\n */\n\n/**\n * Adds appropriate media and discontinuity sequence values to the segments and playlists.\n *\n * Throughout mpd-parser, the `number` attribute is used in relation to `startNumber`, a\n * DASH specific attribute used in constructing segment URI's from templates. However, from\n * an HLS perspective, the `number` attribute on a segment would be its `mediaSequence`\n * value, which should start at the original media sequence value (or 0) and increment by 1\n * for each segment thereafter. Since DASH's `startNumber` values are independent per\n * period, it doesn't make sense to use it for `number`. Instead, assume everything starts\n * from a 0 mediaSequence value and increment from there.\n *\n * Note that VHS currently doesn't use the `number` property, but it can be helpful for\n * debugging and making sense of the manifest.\n *\n * For live playlists, to account for values increasing in manifests when periods are\n * removed on refreshes, merging logic should be used to update the numbers to their\n * appropriate values (to ensure they're sequential and increasing).\n *\n * @param {Object[]} playlists - the playlists to update\n * @param {TimelineStart[]} timelineStarts - the timeline starts for the manifest\n */\n\n\nvar addMediaSequenceValues = function addMediaSequenceValues(playlists, timelineStarts) {\n  // increment all segments sequentially\n  playlists.forEach(function (playlist) {\n    playlist.mediaSequence = 0;\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref7) {\n      var timeline = _ref7.timeline;\n      return timeline === playlist.timeline;\n    });\n\n    if (!playlist.segments) {\n      return;\n    }\n\n    playlist.segments.forEach(function (segment, index) {\n      segment.number = index;\n    });\n  });\n};\n/**\n * Given a media group object, flattens all playlists within the media group into a single\n * array.\n *\n * @param {Object} mediaGroupObject - the media group object\n *\n * @return {Object[]}\n *         The media group playlists\n */\n\nvar flattenMediaGroupPlaylists = function flattenMediaGroupPlaylists(mediaGroupObject) {\n  if (!mediaGroupObject) {\n    return [];\n  }\n\n  return Object.keys(mediaGroupObject).reduce(function (acc, label) {\n    var labelContents = mediaGroupObject[label];\n    return acc.concat(labelContents.playlists);\n  }, []);\n};\nvar toM3u8 = function toM3u8(_ref8) {\n  var _mediaGroups;\n\n  var dashPlaylists = _ref8.dashPlaylists,\n      locations = _ref8.locations,\n      _ref8$sidxMapping = _ref8.sidxMapping,\n      sidxMapping = _ref8$sidxMapping === void 0 ? {} : _ref8$sidxMapping,\n      previousManifest = _ref8.previousManifest;\n\n  if (!dashPlaylists.length) {\n    return {};\n  } // grab all main manifest attributes\n\n\n  var _dashPlaylists$0$attr = dashPlaylists[0].attributes,\n      duration = _dashPlaylists$0$attr.sourceDuration,\n      type = _dashPlaylists$0$attr.type,\n      suggestedPresentationDelay = _dashPlaylists$0$attr.suggestedPresentationDelay,\n      minimumUpdatePeriod = _dashPlaylists$0$attr.minimumUpdatePeriod;\n  var videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);\n  var audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));\n  var vttPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(vttOnly));\n  var captions = dashPlaylists.map(function (playlist) {\n    return playlist.attributes.captionServices;\n  }).filter(Boolean);\n  var manifest = {\n    allowCache: true,\n    discontinuityStarts: [],\n    segments: [],\n    endList: true,\n    mediaGroups: (_mediaGroups = {\n      AUDIO: {},\n      VIDEO: {}\n    }, _mediaGroups['CLOSED-CAPTIONS'] = {}, _mediaGroups.SUBTITLES = {}, _mediaGroups),\n    uri: '',\n    duration: duration,\n    playlists: addSidxSegmentsToPlaylists(videoPlaylists, sidxMapping)\n  };\n\n  if (minimumUpdatePeriod >= 0) {\n    manifest.minimumUpdatePeriod = minimumUpdatePeriod * 1000;\n  }\n\n  if (locations) {\n    manifest.locations = locations;\n  }\n\n  if (type === 'dynamic') {\n    manifest.suggestedPresentationDelay = suggestedPresentationDelay;\n  }\n\n  var isAudioOnly = manifest.playlists.length === 0;\n  var organizedAudioGroup = audioPlaylists.length ? organizeAudioPlaylists(audioPlaylists, sidxMapping, isAudioOnly) : null;\n  var organizedVttGroup = vttPlaylists.length ? organizeVttPlaylists(vttPlaylists, sidxMapping) : null;\n  var formattedPlaylists = videoPlaylists.concat(flattenMediaGroupPlaylists(organizedAudioGroup), flattenMediaGroupPlaylists(organizedVttGroup));\n  var playlistTimelineStarts = formattedPlaylists.map(function (_ref9) {\n    var timelineStarts = _ref9.timelineStarts;\n    return timelineStarts;\n  });\n  manifest.timelineStarts = getUniqueTimelineStarts(playlistTimelineStarts);\n  addMediaSequenceValues(formattedPlaylists, manifest.timelineStarts);\n\n  if (organizedAudioGroup) {\n    manifest.mediaGroups.AUDIO.audio = organizedAudioGroup;\n  }\n\n  if (organizedVttGroup) {\n    manifest.mediaGroups.SUBTITLES.subs = organizedVttGroup;\n  }\n\n  if (captions.length) {\n    manifest.mediaGroups['CLOSED-CAPTIONS'].cc = organizeCaptionServices(captions);\n  }\n\n  if (previousManifest) {\n    return positionManifestOnTimeline({\n      oldManifest: previousManifest,\n      newManifest: manifest\n    });\n  }\n\n  return manifest;\n};\n\n/**\n * Calculates the R (repetition) value for a live stream (for the final segment\n * in a manifest where the r value is negative 1)\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {number} time\n *        current time (typically the total time up until the final segment)\n * @param {number} duration\n *        duration property for the given <S />\n *\n * @return {number}\n *        R value to reach the end of the given period\n */\nvar getLiveRValue = function getLiveRValue(attributes, time, duration) {\n  var NOW = attributes.NOW,\n      clientOffset = attributes.clientOffset,\n      availabilityStartTime = attributes.availabilityStartTime,\n      _attributes$timescale = attributes.timescale,\n      timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n      _attributes$periodSta = attributes.periodStart,\n      periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n      _attributes$minimumUp = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp;\n  var now = (NOW + clientOffset) / 1000;\n  var periodStartWC = availabilityStartTime + periodStart;\n  var periodEndWC = now + minimumUpdatePeriod;\n  var periodDuration = periodEndWC - periodStartWC;\n  return Math.ceil((periodDuration * timescale - time) / duration);\n};\n/**\n * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment\n * timing and duration\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseByTimeline = function parseByTimeline(attributes, segmentTimeline) {\n  var type = attributes.type,\n      _attributes$minimumUp2 = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp2 === void 0 ? 0 : _attributes$minimumUp2,\n      _attributes$media = attributes.media,\n      media = _attributes$media === void 0 ? '' : _attributes$media,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$timescale2 = attributes.timescale,\n      timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n      _attributes$startNumb = attributes.startNumber,\n      startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb,\n      timeline = attributes.periodStart;\n  var segments = [];\n  var time = -1;\n\n  for (var sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {\n    var S = segmentTimeline[sIndex];\n    var duration = S.d;\n    var repeat = S.r || 0;\n    var segmentTime = S.t || 0;\n\n    if (time < 0) {\n      // first segment\n      time = segmentTime;\n    }\n\n    if (segmentTime && segmentTime > time) {\n      // discontinuity\n      // TODO: How to handle this type of discontinuity\n      // timeline++ here would treat it like HLS discontuity and content would\n      // get appended without gap\n      // E.G.\n      //  <S t=\"0\" d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S t=\"5\" d=\"1\" />\n      // would have $Time$ values of [0, 1, 2, 5]\n      // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)\n      // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)\n      // does the value of sourceDuration consider this when calculating arbitrary\n      // negative @r repeat value?\n      // E.G. Same elements as above with this added at the end\n      //  <S d=\"1\" r=\"-1\" />\n      //  with a sourceDuration of 10\n      // Would the 2 gaps be included in the time duration calculations resulting in\n      // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments\n      // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?\n      time = segmentTime;\n    }\n\n    var count = void 0;\n\n    if (repeat < 0) {\n      var nextS = sIndex + 1;\n\n      if (nextS === segmentTimeline.length) {\n        // last segment\n        if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {\n          count = getLiveRValue(attributes, time, duration);\n        } else {\n          // TODO: This may be incorrect depending on conclusion of TODO above\n          count = (sourceDuration * timescale - time) / duration;\n        }\n      } else {\n        count = (segmentTimeline[nextS].t - time) / duration;\n      }\n    } else {\n      count = repeat + 1;\n    }\n\n    var end = startNumber + segments.length + count;\n    var number = startNumber + segments.length;\n\n    while (number < end) {\n      segments.push({\n        number: number,\n        duration: duration / timescale,\n        time: time,\n        timeline: timeline\n      });\n      time += duration;\n      number++;\n    }\n  }\n\n  return segments;\n};\n\nvar identifierPattern = /\\$([A-z]*)(?:(%0)([0-9]+)d)?\\$/g;\n/**\n * Replaces template identifiers with corresponding values. To be used as the callback\n * for String.prototype.replace\n *\n * @name replaceCallback\n * @function\n * @param {string} match\n *        Entire match of identifier\n * @param {string} identifier\n *        Name of matched identifier\n * @param {string} format\n *        Format tag string. Its presence indicates that padding is expected\n * @param {string} width\n *        Desired length of the replaced value. Values less than this width shall be left\n *        zero padded\n * @return {string}\n *         Replacement for the matched identifier\n */\n\n/**\n * Returns a function to be used as a callback for String.prototype.replace to replace\n * template identifiers\n *\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {replaceCallback}\n *         Callback to be used with String.prototype.replace to replace identifiers\n */\n\nvar identifierReplacement = function identifierReplacement(values) {\n  return function (match, identifier, format, width) {\n    if (match === '$$') {\n      // escape sequence\n      return '$';\n    }\n\n    if (typeof values[identifier] === 'undefined') {\n      return match;\n    }\n\n    var value = '' + values[identifier];\n\n    if (identifier === 'RepresentationID') {\n      // Format tag shall not be present with RepresentationID\n      return value;\n    }\n\n    if (!format) {\n      width = 1;\n    } else {\n      width = parseInt(width, 10);\n    }\n\n    if (value.length >= width) {\n      return value;\n    }\n\n    return \"\" + new Array(width - value.length + 1).join('0') + value;\n  };\n};\n/**\n * Constructs a segment url from a template string\n *\n * @param {string} url\n *        Template string to construct url from\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {string}\n *         Segment url with identifiers replaced\n */\n\nvar constructTemplateUrl = function constructTemplateUrl(url, values) {\n  return url.replace(identifierPattern, identifierReplacement(values));\n};\n/**\n * Generates a list of objects containing timing and duration information about each\n * segment needed to generate segment uris and the complete segment object\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseTemplateInfo = function parseTemplateInfo(attributes, segmentTimeline) {\n  if (!attributes.duration && !segmentTimeline) {\n    // if neither @duration or SegmentTimeline are present, then there shall be exactly\n    // one media segment\n    return [{\n      number: attributes.startNumber || 1,\n      duration: attributes.sourceDuration,\n      time: 0,\n      timeline: attributes.periodStart\n    }];\n  }\n\n  if (attributes.duration) {\n    return parseByDuration(attributes);\n  }\n\n  return parseByTimeline(attributes, segmentTimeline);\n};\n/**\n * Generates a list of segments using information provided by the SegmentTemplate element\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object[]}\n *         List of segment objects\n */\n\nvar segmentsFromTemplate = function segmentsFromTemplate(attributes, segmentTimeline) {\n  var templateValues = {\n    RepresentationID: attributes.id,\n    Bandwidth: attributes.bandwidth || 0\n  };\n  var _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {\n    sourceURL: '',\n    range: ''\n  } : _attributes$initializ;\n  var mapSegment = urlTypeToSegment({\n    baseUrl: attributes.baseUrl,\n    source: constructTemplateUrl(initialization.sourceURL, templateValues),\n    range: initialization.range\n  });\n  var segments = parseTemplateInfo(attributes, segmentTimeline);\n  return segments.map(function (segment) {\n    templateValues.Number = segment.number;\n    templateValues.Time = segment.time;\n    var uri = constructTemplateUrl(attributes.media || '', templateValues); // See DASH spec section 5.3.9.2.2\n    // - if timescale isn't present on any level, default to 1.\n\n    var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n    var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n    var presentationTime = // Even if the @t attribute is not specified for the segment, segment.time is\n    // calculated in mpd-parser prior to this, so it's assumed to be available.\n    attributes.periodStart + (segment.time - presentationTimeOffset) / timescale;\n    var map = {\n      uri: uri,\n      timeline: segment.timeline,\n      duration: segment.duration,\n      resolvedUri: resolveUrl(attributes.baseUrl || '', uri),\n      map: mapSegment,\n      number: segment.number,\n      presentationTime: presentationTime\n    };\n    return map;\n  });\n};\n\n/**\n * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)\n * to an object that matches the output of a segment in videojs/mpd-parser\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object} segmentUrl\n *   <SegmentURL> node to translate into a segment object\n * @return {Object} translated segment object\n */\n\nvar SegmentURLToSegmentObject = function SegmentURLToSegmentObject(attributes, segmentUrl) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ;\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: segmentUrl.media,\n    range: segmentUrl.mediaRange\n  });\n  segment.map = initSegment;\n  return segment;\n};\n/**\n * Generates a list of segments using information provided by the SegmentList element\n * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object.<Array>} list of segments\n */\n\n\nvar segmentsFromList = function segmentsFromList(attributes, segmentTimeline) {\n  var duration = attributes.duration,\n      _attributes$segmentUr = attributes.segmentUrls,\n      segmentUrls = _attributes$segmentUr === void 0 ? [] : _attributes$segmentUr,\n      periodStart = attributes.periodStart; // Per spec (5.3.9.2.1) no way to determine segment duration OR\n  // if both SegmentTimeline and @duration are defined, it is outside of spec.\n\n  if (!duration && !segmentTimeline || duration && segmentTimeline) {\n    throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);\n  }\n\n  var segmentUrlMap = segmentUrls.map(function (segmentUrlObject) {\n    return SegmentURLToSegmentObject(attributes, segmentUrlObject);\n  });\n  var segmentTimeInfo;\n\n  if (duration) {\n    segmentTimeInfo = parseByDuration(attributes);\n  }\n\n  if (segmentTimeline) {\n    segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);\n  }\n\n  var segments = segmentTimeInfo.map(function (segmentTime, index) {\n    if (segmentUrlMap[index]) {\n      var segment = segmentUrlMap[index]; // See DASH spec section 5.3.9.2.2\n      // - if timescale isn't present on any level, default to 1.\n\n      var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n      var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n      segment.timeline = segmentTime.timeline;\n      segment.duration = segmentTime.duration;\n      segment.number = segmentTime.number;\n      segment.presentationTime = periodStart + (segmentTime.time - presentationTimeOffset) / timescale;\n      return segment;\n    } // Since we're mapping we should get rid of any blank segments (in case\n    // the given SegmentTimeline is handling for more elements than we have\n    // SegmentURLs for).\n\n  }).filter(function (segment) {\n    return segment;\n  });\n  return segments;\n};\n\nvar generateSegments = function generateSegments(_ref) {\n  var attributes = _ref.attributes,\n      segmentInfo = _ref.segmentInfo;\n  var segmentAttributes;\n  var segmentsFn;\n\n  if (segmentInfo.template) {\n    segmentsFn = segmentsFromTemplate;\n    segmentAttributes = merge(attributes, segmentInfo.template);\n  } else if (segmentInfo.base) {\n    segmentsFn = segmentsFromBase;\n    segmentAttributes = merge(attributes, segmentInfo.base);\n  } else if (segmentInfo.list) {\n    segmentsFn = segmentsFromList;\n    segmentAttributes = merge(attributes, segmentInfo.list);\n  }\n\n  var segmentsInfo = {\n    attributes: attributes\n  };\n\n  if (!segmentsFn) {\n    return segmentsInfo;\n  }\n\n  var segments = segmentsFn(segmentAttributes, segmentInfo.segmentTimeline); // The @duration attribute will be used to determin the playlist's targetDuration which\n  // must be in seconds. Since we've generated the segment list, we no longer need\n  // @duration to be in @timescale units, so we can convert it here.\n\n  if (segmentAttributes.duration) {\n    var _segmentAttributes = segmentAttributes,\n        duration = _segmentAttributes.duration,\n        _segmentAttributes$ti = _segmentAttributes.timescale,\n        timescale = _segmentAttributes$ti === void 0 ? 1 : _segmentAttributes$ti;\n    segmentAttributes.duration = duration / timescale;\n  } else if (segments.length) {\n    // if there is no @duration attribute, use the largest segment duration as\n    // as target duration\n    segmentAttributes.duration = segments.reduce(function (max, segment) {\n      return Math.max(max, Math.ceil(segment.duration));\n    }, 0);\n  } else {\n    segmentAttributes.duration = 0;\n  }\n\n  segmentsInfo.attributes = segmentAttributes;\n  segmentsInfo.segments = segments; // This is a sidx box without actual segment information\n\n  if (segmentInfo.base && segmentAttributes.indexRange) {\n    segmentsInfo.sidx = segments[0];\n    segmentsInfo.segments = [];\n  }\n\n  return segmentsInfo;\n};\nvar toPlaylists = function toPlaylists(representations) {\n  return representations.map(generateSegments);\n};\n\nvar findChildren = function findChildren(element, name) {\n  return from(element.childNodes).filter(function (_ref) {\n    var tagName = _ref.tagName;\n    return tagName === name;\n  });\n};\nvar getContent = function getContent(element) {\n  return element.textContent.trim();\n};\n\n/**\n * Converts the provided string that may contain a division operation to a number.\n *\n * @param {string} value - the provided string value\n *\n * @return {number} the parsed string value\n */\nvar parseDivisionValue = function parseDivisionValue(value) {\n  return parseFloat(value.split('/').reduce(function (prev, current) {\n    return prev / current;\n  }));\n};\n\nvar parseDuration = function parseDuration(str) {\n  var SECONDS_IN_YEAR = 365 * 24 * 60 * 60;\n  var SECONDS_IN_MONTH = 30 * 24 * 60 * 60;\n  var SECONDS_IN_DAY = 24 * 60 * 60;\n  var SECONDS_IN_HOUR = 60 * 60;\n  var SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S\n\n  var durationRegex = /P(?:(\\d*)Y)?(?:(\\d*)M)?(?:(\\d*)D)?(?:T(?:(\\d*)H)?(?:(\\d*)M)?(?:([\\d.]*)S)?)?/;\n  var match = durationRegex.exec(str);\n\n  if (!match) {\n    return 0;\n  }\n\n  var _match$slice = match.slice(1),\n      year = _match$slice[0],\n      month = _match$slice[1],\n      day = _match$slice[2],\n      hour = _match$slice[3],\n      minute = _match$slice[4],\n      second = _match$slice[5];\n\n  return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);\n};\nvar parseDate = function parseDate(str) {\n  // Date format without timezone according to ISO 8601\n  // YYY-MM-DDThh:mm:ss.ssssss\n  var dateRegex = /^\\d+-\\d+-\\d+T\\d+:\\d+:\\d+(\\.\\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is\n  // expressed by ending with 'Z'\n\n  if (dateRegex.test(str)) {\n    str += 'Z';\n  }\n\n  return Date.parse(str);\n};\n\nvar parsers = {\n  /**\n   * Specifies the duration of the entire Media Presentation. Format is a duration string\n   * as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  mediaPresentationDuration: function mediaPresentationDuration(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the Segment availability start time for all Segments referred to in this\n   * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability\n   * time. Format is a date string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The date as seconds from unix epoch\n   */\n  availabilityStartTime: function availabilityStartTime(value) {\n    return parseDate(value) / 1000;\n  },\n\n  /**\n   * Specifies the smallest period between potential changes to the MPD. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  minimumUpdatePeriod: function minimumUpdatePeriod(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the suggested presentation delay. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  suggestedPresentationDelay: function suggestedPresentationDelay(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * specifices the type of mpd. Can be either \"static\" or \"dynamic\"\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   *\n   * @return {string}\n   *         The type as a string\n   */\n  type: function type(value) {\n    return value;\n  },\n\n  /**\n   * Specifies the duration of the smallest time shifting buffer for any Representation\n   * in the MPD. Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  timeShiftBufferDepth: function timeShiftBufferDepth(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.\n   * Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  start: function start(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the width of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed width\n   */\n  width: function width(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the height of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed height\n   */\n  height: function height(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the bitrate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed bandwidth\n   */\n  bandwidth: function bandwidth(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the frame rate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed frame rate\n   */\n  frameRate: function frameRate(value) {\n    return parseDivisionValue(value);\n  },\n\n  /**\n   * Specifies the number of the first Media Segment in this Representation in the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  startNumber: function startNumber(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the timescale in units per seconds\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed timescale\n   */\n  timescale: function timescale(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the presentationTimeOffset.\n   *\n   * @param {string} value\n   *        value of the attribute as a string\n   *\n   * @return {number}\n   *         The parsed presentationTimeOffset\n   */\n  presentationTimeOffset: function presentationTimeOffset(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the constant approximate Segment duration\n   * NOTE: The <Period> element also contains an @duration attribute. This duration\n   *       specifies the duration of the Period. This attribute is currently not\n   *       supported by the rest of the parser, however we still check for it to prevent\n   *       errors.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  duration: function duration(value) {\n    var parsedValue = parseInt(value, 10);\n\n    if (isNaN(parsedValue)) {\n      return parseDuration(value);\n    }\n\n    return parsedValue;\n  },\n\n  /**\n   * Specifies the Segment duration, in units of the value of the @timescale.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  d: function d(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the MPD start time, in @timescale units, the first Segment in the series\n   * starts relative to the beginning of the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed time\n   */\n  t: function t(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the repeat count of the number of following contiguous Segments with the\n   * same duration expressed by the value of @d\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  r: function r(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Default parser for all other attributes. Acts as a no-op and just returns the value\n   * as a string\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {string}\n   *         Unparsed value\n   */\n  DEFAULT: function DEFAULT(value) {\n    return value;\n  }\n};\n/**\n * Gets all the attributes and values of the provided node, parses attributes with known\n * types, and returns an object with attribute names mapped to values.\n *\n * @param {Node} el\n *        The node to parse attributes from\n * @return {Object}\n *         Object with all attributes of el parsed\n */\n\nvar parseAttributes = function parseAttributes(el) {\n  if (!(el && el.attributes)) {\n    return {};\n  }\n\n  return from(el.attributes).reduce(function (a, e) {\n    var parseFn = parsers[e.name] || parsers.DEFAULT;\n    a[e.name] = parseFn(e.value);\n    return a;\n  }, {});\n};\n\nvar keySystemsMap = {\n  'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',\n  'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',\n  'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',\n  'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'\n};\n/**\n * Builds a list of urls that is the product of the reference urls and BaseURL values\n *\n * @param {string[]} referenceUrls\n *        List of reference urls to resolve to\n * @param {Node[]} baseUrlElements\n *        List of BaseURL nodes from the mpd\n * @return {string[]}\n *         List of resolved urls\n */\n\nvar buildBaseUrls = function buildBaseUrls(referenceUrls, baseUrlElements) {\n  if (!baseUrlElements.length) {\n    return referenceUrls;\n  }\n\n  return flatten(referenceUrls.map(function (reference) {\n    return baseUrlElements.map(function (baseUrlElement) {\n      return resolveUrl(reference, getContent(baseUrlElement));\n    });\n  }));\n};\n/**\n * Contains all Segment information for its containing AdaptationSet\n *\n * @typedef {Object} SegmentInformation\n * @property {Object|undefined} template\n *           Contains the attributes for the SegmentTemplate node\n * @property {Object[]|undefined} segmentTimeline\n *           Contains a list of atrributes for each S node within the SegmentTimeline node\n * @property {Object|undefined} list\n *           Contains the attributes for the SegmentList node\n * @property {Object|undefined} base\n *           Contains the attributes for the SegmentBase node\n */\n\n/**\n * Returns all available Segment information contained within the AdaptationSet node\n *\n * @param {Node} adaptationSet\n *        The AdaptationSet node to get Segment information from\n * @return {SegmentInformation}\n *         The Segment information contained within the provided AdaptationSet\n */\n\nvar getSegmentInformation = function getSegmentInformation(adaptationSet) {\n  var segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];\n  var segmentList = findChildren(adaptationSet, 'SegmentList')[0];\n  var segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(function (s) {\n    return merge({\n      tag: 'SegmentURL'\n    }, parseAttributes(s));\n  });\n  var segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];\n  var segmentTimelineParentNode = segmentList || segmentTemplate;\n  var segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];\n  var segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;\n  var segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both\n  // @initialization and an <Initialization> node.  @initialization can be templated,\n  // while the node can have a url and range specified.  If the <SegmentTemplate> has\n  // both @initialization and an <Initialization> subelement we opt to override with\n  // the node, as this interaction is not defined in the spec.\n\n  var template = segmentTemplate && parseAttributes(segmentTemplate);\n\n  if (template && segmentInitialization) {\n    template.initialization = segmentInitialization && parseAttributes(segmentInitialization);\n  } else if (template && template.initialization) {\n    // If it is @initialization we convert it to an object since this is the format that\n    // later functions will rely on for the initialization segment.  This is only valid\n    // for <SegmentTemplate>\n    template.initialization = {\n      sourceURL: template.initialization\n    };\n  }\n\n  var segmentInfo = {\n    template: template,\n    segmentTimeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(function (s) {\n      return parseAttributes(s);\n    }),\n    list: segmentList && merge(parseAttributes(segmentList), {\n      segmentUrls: segmentUrls,\n      initialization: parseAttributes(segmentInitialization)\n    }),\n    base: segmentBase && merge(parseAttributes(segmentBase), {\n      initialization: parseAttributes(segmentInitialization)\n    })\n  };\n  Object.keys(segmentInfo).forEach(function (key) {\n    if (!segmentInfo[key]) {\n      delete segmentInfo[key];\n    }\n  });\n  return segmentInfo;\n};\n/**\n * Contains Segment information and attributes needed to construct a Playlist object\n * from a Representation\n *\n * @typedef {Object} RepresentationInformation\n * @property {SegmentInformation} segmentInfo\n *           Segment information for this Representation\n * @property {Object} attributes\n *           Inherited attributes for this Representation\n */\n\n/**\n * Maps a Representation node to an object containing Segment information and attributes\n *\n * @name inheritBaseUrlsCallback\n * @function\n * @param {Node} representation\n *        Representation node from the mpd\n * @return {RepresentationInformation}\n *         Representation information needed to construct a Playlist object\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Representation nodes to\n * Segment information and attributes using inherited BaseURL nodes.\n *\n * @param {Object} adaptationSetAttributes\n *        Contains attributes inherited by the AdaptationSet\n * @param {string[]} adaptationSetBaseUrls\n *        Contains list of resolved base urls inherited by the AdaptationSet\n * @param {SegmentInformation} adaptationSetSegmentInfo\n *        Contains Segment information for the AdaptationSet\n * @return {inheritBaseUrlsCallback}\n *         Callback map function\n */\n\nvar inheritBaseUrls = function inheritBaseUrls(adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) {\n  return function (representation) {\n    var repBaseUrlElements = findChildren(representation, 'BaseURL');\n    var repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);\n    var attributes = merge(adaptationSetAttributes, parseAttributes(representation));\n    var representationSegmentInfo = getSegmentInformation(representation);\n    return repBaseUrls.map(function (baseUrl) {\n      return {\n        segmentInfo: merge(adaptationSetSegmentInfo, representationSegmentInfo),\n        attributes: merge(attributes, {\n          baseUrl: baseUrl\n        })\n      };\n    });\n  };\n};\n/**\n * Tranforms a series of content protection nodes to\n * an object containing pssh data by key system\n *\n * @param {Node[]} contentProtectionNodes\n *        Content protection nodes\n * @return {Object}\n *        Object containing pssh data by key system\n */\n\nvar generateKeySystemInformation = function generateKeySystemInformation(contentProtectionNodes) {\n  return contentProtectionNodes.reduce(function (acc, node) {\n    var attributes = parseAttributes(node); // Although it could be argued that according to the UUID RFC spec the UUID string (a-f chars) should be generated\n    // as a lowercase string it also mentions it should be treated as case-insensitive on input. Since the key system\n    // UUIDs in the keySystemsMap are hardcoded as lowercase in the codebase there isn't any reason not to do\n    // .toLowerCase() on the input UUID string from the manifest (at least I could not think of one).\n\n    if (attributes.schemeIdUri) {\n      attributes.schemeIdUri = attributes.schemeIdUri.toLowerCase();\n    }\n\n    var keySystem = keySystemsMap[attributes.schemeIdUri];\n\n    if (keySystem) {\n      acc[keySystem] = {\n        attributes: attributes\n      };\n      var psshNode = findChildren(node, 'cenc:pssh')[0];\n\n      if (psshNode) {\n        var pssh = getContent(psshNode);\n        acc[keySystem].pssh = pssh && decodeB64ToUint8Array(pssh);\n      }\n    }\n\n    return acc;\n  }, {});\n}; // defined in ANSI_SCTE 214-1 2016\n\n\nvar parseCaptionServiceMetadata = function parseCaptionServiceMetadata(service) {\n  // 608 captions\n  if (service.schemeIdUri === 'urn:scte:dash:cc:cea-608:2015') {\n    var values = typeof service.value !== 'string' ? [] : service.value.split(';');\n    return values.map(function (value) {\n      var channel;\n      var language; // default language to value\n\n      language = value;\n\n      if (/^CC\\d=/.test(value)) {\n        var _value$split = value.split('=');\n\n        channel = _value$split[0];\n        language = _value$split[1];\n      } else if (/^CC\\d$/.test(value)) {\n        channel = value;\n      }\n\n      return {\n        channel: channel,\n        language: language\n      };\n    });\n  } else if (service.schemeIdUri === 'urn:scte:dash:cc:cea-708:2015') {\n    var _values = typeof service.value !== 'string' ? [] : service.value.split(';');\n\n    return _values.map(function (value) {\n      var flags = {\n        // service or channel number 1-63\n        'channel': undefined,\n        // language is a 3ALPHA per ISO 639.2/B\n        // field is required\n        'language': undefined,\n        // BIT 1/0 or ?\n        // default value is 1, meaning 16:9 aspect ratio, 0 is 4:3, ? is unknown\n        'aspectRatio': 1,\n        // BIT 1/0\n        // easy reader flag indicated the text is tailed to the needs of beginning readers\n        // default 0, or off\n        'easyReader': 0,\n        // BIT 1/0\n        // If 3d metadata is present (CEA-708.1) then 1\n        // default 0\n        '3D': 0\n      };\n\n      if (/=/.test(value)) {\n        var _value$split2 = value.split('='),\n            channel = _value$split2[0],\n            _value$split2$ = _value$split2[1],\n            opts = _value$split2$ === void 0 ? '' : _value$split2$;\n\n        flags.channel = channel;\n        flags.language = value;\n        opts.split(',').forEach(function (opt) {\n          var _opt$split = opt.split(':'),\n              name = _opt$split[0],\n              val = _opt$split[1];\n\n          if (name === 'lang') {\n            flags.language = val; // er for easyReadery\n          } else if (name === 'er') {\n            flags.easyReader = Number(val); // war for wide aspect ratio\n          } else if (name === 'war') {\n            flags.aspectRatio = Number(val);\n          } else if (name === '3D') {\n            flags['3D'] = Number(val);\n          }\n        });\n      } else {\n        flags.language = value;\n      }\n\n      if (flags.channel) {\n        flags.channel = 'SERVICE' + flags.channel;\n      }\n\n      return flags;\n    });\n  }\n};\n/**\n * Maps an AdaptationSet node to a list of Representation information objects\n *\n * @name toRepresentationsCallback\n * @function\n * @param {Node} adaptationSet\n *        AdaptationSet node from the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of\n * Representation information objects\n *\n * @param {Object} periodAttributes\n *        Contains attributes inherited by the Period\n * @param {string[]} periodBaseUrls\n *        Contains list of resolved base urls inherited by the Period\n * @param {string[]} periodSegmentInfo\n *        Contains Segment Information at the period level\n * @return {toRepresentationsCallback}\n *         Callback map function\n */\n\nvar toRepresentations = function toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo) {\n  return function (adaptationSet) {\n    var adaptationSetAttributes = parseAttributes(adaptationSet);\n    var adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));\n    var role = findChildren(adaptationSet, 'Role')[0];\n    var roleAttributes = {\n      role: parseAttributes(role)\n    };\n    var attrs = merge(periodAttributes, adaptationSetAttributes, roleAttributes);\n    var accessibility = findChildren(adaptationSet, 'Accessibility')[0];\n    var captionServices = parseCaptionServiceMetadata(parseAttributes(accessibility));\n\n    if (captionServices) {\n      attrs = merge(attrs, {\n        captionServices: captionServices\n      });\n    }\n\n    var label = findChildren(adaptationSet, 'Label')[0];\n\n    if (label && label.childNodes.length) {\n      var labelVal = label.childNodes[0].nodeValue.trim();\n      attrs = merge(attrs, {\n        label: labelVal\n      });\n    }\n\n    var contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));\n\n    if (Object.keys(contentProtection).length) {\n      attrs = merge(attrs, {\n        contentProtection: contentProtection\n      });\n    }\n\n    var segmentInfo = getSegmentInformation(adaptationSet);\n    var representations = findChildren(adaptationSet, 'Representation');\n    var adaptationSetSegmentInfo = merge(periodSegmentInfo, segmentInfo);\n    return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));\n  };\n};\n/**\n * Contains all period information for mapping nodes onto adaptation sets.\n *\n * @typedef {Object} PeriodInformation\n * @property {Node} period.node\n *           Period node from the mpd\n * @property {Object} period.attributes\n *           Parsed period attributes from node plus any added\n */\n\n/**\n * Maps a PeriodInformation object to a list of Representation information objects for all\n * AdaptationSet nodes contained within the Period.\n *\n * @name toAdaptationSetsCallback\n * @function\n * @param {PeriodInformation} period\n *        Period object containing necessary period information\n * @param {number} periodStart\n *        Start time of the Period within the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Period nodes to a list of\n * Representation information objects\n *\n * @param {Object} mpdAttributes\n *        Contains attributes inherited by the mpd\n * @param {string[]} mpdBaseUrls\n *        Contains list of resolved base urls inherited by the mpd\n * @return {toAdaptationSetsCallback}\n *         Callback map function\n */\n\nvar toAdaptationSets = function toAdaptationSets(mpdAttributes, mpdBaseUrls) {\n  return function (period, index) {\n    var periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period.node, 'BaseURL'));\n    var periodAttributes = merge(mpdAttributes, {\n      periodStart: period.attributes.start\n    });\n\n    if (typeof period.attributes.duration === 'number') {\n      periodAttributes.periodDuration = period.attributes.duration;\n    }\n\n    var adaptationSets = findChildren(period.node, 'AdaptationSet');\n    var periodSegmentInfo = getSegmentInformation(period.node);\n    return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));\n  };\n};\n/**\n * Gets Period@start property for a given period.\n *\n * @param {Object} options\n *        Options object\n * @param {Object} options.attributes\n *        Period attributes\n * @param {Object} [options.priorPeriodAttributes]\n *        Prior period attributes (if prior period is available)\n * @param {string} options.mpdType\n *        The MPD@type these periods came from\n * @return {number|null}\n *         The period start, or null if it's an early available period or error\n */\n\nvar getPeriodStart = function getPeriodStart(_ref) {\n  var attributes = _ref.attributes,\n      priorPeriodAttributes = _ref.priorPeriodAttributes,\n      mpdType = _ref.mpdType;\n\n  // Summary of period start time calculation from DASH spec section 5.3.2.1\n  //\n  // A period's start is the first period's start + time elapsed after playing all\n  // prior periods to this one. Periods continue one after the other in time (without\n  // gaps) until the end of the presentation.\n  //\n  // The value of Period@start should be:\n  // 1. if Period@start is present: value of Period@start\n  // 2. if previous period exists and it has @duration: previous Period@start +\n  //    previous Period@duration\n  // 3. if this is first period and MPD@type is 'static': 0\n  // 4. in all other cases, consider the period an \"early available period\" (note: not\n  //    currently supported)\n  // (1)\n  if (typeof attributes.start === 'number') {\n    return attributes.start;\n  } // (2)\n\n\n  if (priorPeriodAttributes && typeof priorPeriodAttributes.start === 'number' && typeof priorPeriodAttributes.duration === 'number') {\n    return priorPeriodAttributes.start + priorPeriodAttributes.duration;\n  } // (3)\n\n\n  if (!priorPeriodAttributes && mpdType === 'static') {\n    return 0;\n  } // (4)\n  // There is currently no logic for calculating the Period@start value if there is\n  // no Period@start or prior Period@start and Period@duration available. This is not made\n  // explicit by the DASH interop guidelines or the DASH spec, however, since there's\n  // nothing about any other resolution strategies, it's implied. Thus, this case should\n  // be considered an early available period, or error, and null should suffice for both\n  // of those cases.\n\n\n  return null;\n};\n/**\n * Traverses the mpd xml tree to generate a list of Representation information objects\n * that have inherited attributes from parent nodes\n *\n * @param {Node} mpd\n *        The root node of the mpd\n * @param {Object} options\n *        Available options for inheritAttributes\n * @param {string} options.manifestUri\n *        The uri source of the mpd\n * @param {number} options.NOW\n *        Current time per DASH IOP.  Default is current time in ms since epoch\n * @param {number} options.clientOffset\n *        Client time difference from NOW (in milliseconds)\n * @return {RepresentationInformation[]}\n *         List of objects containing Representation information\n */\n\nvar inheritAttributes = function inheritAttributes(mpd, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      _options$manifestUri = _options.manifestUri,\n      manifestUri = _options$manifestUri === void 0 ? '' : _options$manifestUri,\n      _options$NOW = _options.NOW,\n      NOW = _options$NOW === void 0 ? Date.now() : _options$NOW,\n      _options$clientOffset = _options.clientOffset,\n      clientOffset = _options$clientOffset === void 0 ? 0 : _options$clientOffset;\n  var periodNodes = findChildren(mpd, 'Period');\n\n  if (!periodNodes.length) {\n    throw new Error(errors.INVALID_NUMBER_OF_PERIOD);\n  }\n\n  var locations = findChildren(mpd, 'Location');\n  var mpdAttributes = parseAttributes(mpd);\n  var mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL')); // See DASH spec section 5.3.1.2, Semantics of MPD element. Default type to 'static'.\n\n  mpdAttributes.type = mpdAttributes.type || 'static';\n  mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;\n  mpdAttributes.NOW = NOW;\n  mpdAttributes.clientOffset = clientOffset;\n\n  if (locations.length) {\n    mpdAttributes.locations = locations.map(getContent);\n  }\n\n  var periods = []; // Since toAdaptationSets acts on individual periods right now, the simplest approach to\n  // adding properties that require looking at prior periods is to parse attributes and add\n  // missing ones before toAdaptationSets is called. If more such properties are added, it\n  // may be better to refactor toAdaptationSets.\n\n  periodNodes.forEach(function (node, index) {\n    var attributes = parseAttributes(node); // Use the last modified prior period, as it may contain added information necessary\n    // for this period.\n\n    var priorPeriod = periods[index - 1];\n    attributes.start = getPeriodStart({\n      attributes: attributes,\n      priorPeriodAttributes: priorPeriod ? priorPeriod.attributes : null,\n      mpdType: mpdAttributes.type\n    });\n    periods.push({\n      node: node,\n      attributes: attributes\n    });\n  });\n  return {\n    locations: mpdAttributes.locations,\n    representationInfo: flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)))\n  };\n};\n\nvar stringToMpdXml = function stringToMpdXml(manifestString) {\n  if (manifestString === '') {\n    throw new Error(errors.DASH_EMPTY_MANIFEST);\n  }\n\n  var parser = new DOMParser();\n  var xml;\n  var mpd;\n\n  try {\n    xml = parser.parseFromString(manifestString, 'application/xml');\n    mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;\n  } catch (e) {// ie 11 throwsw on invalid xml\n  }\n\n  if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {\n    throw new Error(errors.DASH_INVALID_XML);\n  }\n\n  return mpd;\n};\n\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} mpd\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\nvar parseUTCTimingScheme = function parseUTCTimingScheme(mpd) {\n  var UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];\n\n  if (!UTCTimingNode) {\n    return null;\n  }\n\n  var attributes = parseAttributes(UTCTimingNode);\n\n  switch (attributes.schemeIdUri) {\n    case 'urn:mpeg:dash:utc:http-head:2014':\n    case 'urn:mpeg:dash:utc:http-head:2012':\n      attributes.method = 'HEAD';\n      break;\n\n    case 'urn:mpeg:dash:utc:http-xsdate:2014':\n    case 'urn:mpeg:dash:utc:http-iso:2014':\n    case 'urn:mpeg:dash:utc:http-xsdate:2012':\n    case 'urn:mpeg:dash:utc:http-iso:2012':\n      attributes.method = 'GET';\n      break;\n\n    case 'urn:mpeg:dash:utc:direct:2014':\n    case 'urn:mpeg:dash:utc:direct:2012':\n      attributes.method = 'DIRECT';\n      attributes.value = Date.parse(attributes.value);\n      break;\n\n    case 'urn:mpeg:dash:utc:http-ntp:2014':\n    case 'urn:mpeg:dash:utc:ntp:2014':\n    case 'urn:mpeg:dash:utc:sntp:2014':\n    default:\n      throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);\n  }\n\n  return attributes;\n};\n\nvar VERSION = version;\n/*\n * Given a DASH manifest string and options, parses the DASH manifest into an object in the\n * form outputed by m3u8-parser and accepted by videojs/http-streaming.\n *\n * For live DASH manifests, if `previousManifest` is provided in options, then the newly\n * parsed DASH manifest will have its media sequence and discontinuity sequence values\n * updated to reflect its position relative to the prior manifest.\n *\n * @param {string} manifestString - the DASH manifest as a string\n * @param {options} [options] - any options\n *\n * @return {Object} the manifest object\n */\n\nvar parse = function parse(manifestString, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var parsedManifestInfo = inheritAttributes(stringToMpdXml(manifestString), options);\n  var playlists = toPlaylists(parsedManifestInfo.representationInfo);\n  return toM3u8({\n    dashPlaylists: playlists,\n    locations: parsedManifestInfo.locations,\n    sidxMapping: options.sidxMapping,\n    previousManifest: options.previousManifest\n  });\n};\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} manifestString\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n\nvar parseUTCTiming = function parseUTCTiming(manifestString) {\n  return parseUTCTimingScheme(stringToMpdXml(manifestString));\n};\n\nexport { VERSION, addSidxSegmentsToPlaylist$1 as addSidxSegmentsToPlaylist, generateSidxKey, inheritAttributes, parse, parseUTCTiming, stringToMpdXml, toM3u8, toPlaylists };\n","'use strict'\n\n/**\n * Ponyfill for `Array.prototype.find` which is only available in ES6 runtimes.\n *\n * Works with anything that has a `length` property and index access properties, including NodeList.\n *\n * @template {unknown} T\n * @param {Array<T> | ({length:number, [number]: T})} list\n * @param {function (item: T, index: number, list:Array<T> | ({length:number, [number]: T})):boolean} predicate\n * @param {Partial<Pick<ArrayConstructor['prototype'], 'find'>>?} ac `Array.prototype` by default,\n * \t\t\t\tallows injecting a custom implementation in tests\n * @returns {T | undefined}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find\n * @see https://tc39.es/ecma262/multipage/indexed-collections.html#sec-array.prototype.find\n */\nfunction find(list, predicate, ac) {\n\tif (ac === undefined) {\n\t\tac = Array.prototype;\n\t}\n\tif (list && typeof ac.find === 'function') {\n\t\treturn ac.find.call(list, predicate);\n\t}\n\tfor (var i = 0; i < list.length; i++) {\n\t\tif (Object.prototype.hasOwnProperty.call(list, i)) {\n\t\t\tvar item = list[i];\n\t\t\tif (predicate.call(undefined, item, i, list)) {\n\t\t\t\treturn item;\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * \"Shallow freezes\" an object to render it immutable.\n * Uses `Object.freeze` if available,\n * otherwise the immutability is only in the type.\n *\n * Is used to create \"enum like\" objects.\n *\n * @template T\n * @param {T} object the object to freeze\n * @param {Pick<ObjectConstructor, 'freeze'> = Object} oc `Object` by default,\n * \t\t\t\tallows to inject custom object constructor for tests\n * @returns {Readonly<T>}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze\n */\nfunction freeze(object, oc) {\n\tif (oc === undefined) {\n\t\toc = Object\n\t}\n\treturn oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object\n}\n\n/**\n * Since we can not rely on `Object.assign` we provide a simplified version\n * that is sufficient for our needs.\n *\n * @param {Object} target\n * @param {Object | null | undefined} source\n *\n * @returns {Object} target\n * @throws TypeError if target is not an object\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign\n * @see https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.assign\n */\nfunction assign(target, source) {\n\tif (target === null || typeof target !== 'object') {\n\t\tthrow new TypeError('target is not an object')\n\t}\n\tfor (var key in source) {\n\t\tif (Object.prototype.hasOwnProperty.call(source, key)) {\n\t\t\ttarget[key] = source[key]\n\t\t}\n\t}\n\treturn target\n}\n\n/**\n * All mime types that are allowed as input to `DOMParser.parseFromString`\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString#Argument02 MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#domparsersupportedtype WHATWG HTML Spec\n * @see DOMParser.prototype.parseFromString\n */\nvar MIME_TYPE = freeze({\n\t/**\n\t * `text/html`, the only mime type that triggers treating an XML document as HTML.\n\t *\n\t * @see DOMParser.SupportedType.isHTML\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring WHATWG HTML Spec\n\t */\n\tHTML: 'text/html',\n\n\t/**\n\t * Helper method to check a mime type if it indicates an HTML document\n\t *\n\t * @param {string} [value]\n\t * @returns {boolean}\n\t *\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring \t */\n\tisHTML: function (value) {\n\t\treturn value === MIME_TYPE.HTML\n\t},\n\n\t/**\n\t * `application/xml`, the standard mime type for XML documents.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xml IANA MimeType registration\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.1 RFC 7303\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_APPLICATION: 'application/xml',\n\n\t/**\n\t * `text/html`, an alias for `application/xml`.\n\t *\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.2 RFC 7303\n\t * @see https://www.iana.org/assignments/media-types/text/xml IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_TEXT: 'text/xml',\n\n\t/**\n\t * `application/xhtml+xml`, indicates an XML document that has the default HTML namespace,\n\t * but is parsed as an XML document.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xhtml+xml IANA MimeType registration\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument WHATWG DOM Spec\n\t * @see https://en.wikipedia.org/wiki/XHTML Wikipedia\n\t */\n\tXML_XHTML_APPLICATION: 'application/xhtml+xml',\n\n\t/**\n\t * `image/svg+xml`,\n\t *\n\t * @see https://www.iana.org/assignments/media-types/image/svg+xml IANA MimeType registration\n\t * @see https://www.w3.org/TR/SVG11/ W3C SVG 1.1\n\t * @see https://en.wikipedia.org/wiki/Scalable_Vector_Graphics Wikipedia\n\t */\n\tXML_SVG_IMAGE: 'image/svg+xml',\n})\n\n/**\n * Namespaces that are used in this code base.\n *\n * @see http://www.w3.org/TR/REC-xml-names\n */\nvar NAMESPACE = freeze({\n\t/**\n\t * The XHTML namespace.\n\t *\n\t * @see http://www.w3.org/1999/xhtml\n\t */\n\tHTML: 'http://www.w3.org/1999/xhtml',\n\n\t/**\n\t * Checks if `uri` equals `NAMESPACE.HTML`.\n\t *\n\t * @param {string} [uri]\n\t *\n\t * @see NAMESPACE.HTML\n\t */\n\tisHTML: function (uri) {\n\t\treturn uri === NAMESPACE.HTML\n\t},\n\n\t/**\n\t * The SVG namespace.\n\t *\n\t * @see http://www.w3.org/2000/svg\n\t */\n\tSVG: 'http://www.w3.org/2000/svg',\n\n\t/**\n\t * The `xml:` namespace.\n\t *\n\t * @see http://www.w3.org/XML/1998/namespace\n\t */\n\tXML: 'http://www.w3.org/XML/1998/namespace',\n\n\t/**\n\t * The `xmlns:` namespace\n\t *\n\t * @see https://www.w3.org/2000/xmlns/\n\t */\n\tXMLNS: 'http://www.w3.org/2000/xmlns/',\n})\n\nexports.assign = assign;\nexports.find = find;\nexports.freeze = freeze;\nexports.MIME_TYPE = MIME_TYPE;\nexports.NAMESPACE = NAMESPACE;\n","var MPEGURL_REGEX = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\nvar DASH_REGEX = /^application\\/dash\\+xml/i;\n/**\n * Returns a string that describes the type of source based on a video source object's\n * media type.\n *\n * @see {@link https://dev.w3.org/html5/pf-summary/video.html#dom-source-type|Source Type}\n *\n * @param {string} type\n *        Video source object media type\n * @return {('hls'|'dash'|'vhs-json'|null)}\n *         VHS source type string\n */\n\nexport var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {\n  if (MPEGURL_REGEX.test(type)) {\n    return 'hls';\n  }\n\n  if (DASH_REGEX.test(type)) {\n    return 'dash';\n  } // Denotes the special case of a manifest object passed to http-streaming instead of a\n  // source URL.\n  //\n  // See https://en.wikipedia.org/wiki/Media_type for details on specifying media types.\n  //\n  // In this case, vnd stands for vendor, video.js for the organization, VHS for this\n  // project, and the +json suffix identifies the structure of the media type.\n\n\n  if (type === 'application/vnd.videojs.vhs+json') {\n    return 'vhs-json';\n  }\n\n  return null;\n};","\"use strict\";\n\nvar window = require('global/window');\n\nvar httpResponseHandler = function httpResponseHandler(callback, decodeResponseBody) {\n  if (decodeResponseBody === void 0) {\n    decodeResponseBody = false;\n  }\n\n  return function (err, response, responseBody) {\n    // if the XHR failed, return that error\n    if (err) {\n      callback(err);\n      return;\n    } // if the HTTP status code is 4xx or 5xx, the request also failed\n\n\n    if (response.statusCode >= 400 && response.statusCode <= 599) {\n      var cause = responseBody;\n\n      if (decodeResponseBody) {\n        if (window.TextDecoder) {\n          var charset = getCharset(response.headers && response.headers['content-type']);\n\n          try {\n            cause = new TextDecoder(charset).decode(responseBody);\n          } catch (e) {}\n        } else {\n          cause = String.fromCharCode.apply(null, new Uint8Array(responseBody));\n        }\n      }\n\n      callback({\n        cause: cause\n      });\n      return;\n    } // otherwise, request succeeded\n\n\n    callback(null, responseBody);\n  };\n};\n\nfunction getCharset(contentTypeHeader) {\n  if (contentTypeHeader === void 0) {\n    contentTypeHeader = '';\n  }\n\n  return contentTypeHeader.toLowerCase().split(';').reduce(function (charset, contentType) {\n    var _contentType$split = contentType.split('='),\n        type = _contentType$split[0],\n        value = _contentType$split[1];\n\n    if (type.trim() === 'charset') {\n      return value.trim();\n    }\n\n    return charset;\n  }, 'utf-8');\n}\n\nmodule.exports = httpResponseHandler;","module.exports = SafeParseTuple\n\nfunction SafeParseTuple(obj, reviver) {\n    var json\n    var error = null\n\n    try {\n        json = JSON.parse(obj, reviver)\n    } catch (err) {\n        error = err\n    }\n\n    return [error, json]\n}\n","import { API, graphqlOperation, GRAPHQL_AUTH_MODE } from '@aws-amplify/api';\nimport { listVodEntries,listPrimarySliders, getVodEntry } from '@/graphql/queries';\nimport { getAWSStorageAsset } from '@/services/storage';\nimport Video from \"video.js\";\n/**\n * Fetches slider items for a given category from the backend using GraphQL queries.\n * Also fetches the associated VOD (Video On Demand) entry and image assets.\n *\n * \n */\nexport const fetchSliderItems = async (categoryType) => {\n  try {\n    const filter = { category: { contains: categoryType } };\n\n    // Fetch slider items using GraphQL query\n    const response = await API.graphql({\n      query: listPrimarySliders,\n      variables: { filter },\n      authMode: GRAPHQL_AUTH_MODE.API_KEY\n    });\n\n    // Validate GraphQL response structure\n    if (!response.data || !response.data.listPrimarySliders) {\n      console.error(\"Data structure from GraphQL response is unexpected.\");\n      return [];\n    }\n\n    let sliderItems = response.data.listPrimarySliders.items;\n\n    // Fetch associated assets (image, video) for each slider item\n    sliderItems = await Promise.all(\n      sliderItems.map(async (item) => {\n        try {\n          // Fetch image from storage\n          if(item.imageFilename != \" \" || item.imageFilename.length > 0 ) {\n          const imageAsset = await getAWSStorageAsset(`SlidingImage/${item.imageFilename[0]}`);\n          item.image = imageAsset;\n          }\n          // Fetch associated VOD entry if exists\n          if (item.content?.vodEntryId) {\n            const vodEntryResponse = await API.graphql({\n              ...graphqlOperation(getVodEntry, { id: item.content.vodEntryId }),\n              authMode: GRAPHQL_AUTH_MODE.API_KEY\n            });\n\n            const fetchedVodEntry = vodEntryResponse.data.getVodEntry;\n            if (fetchedVodEntry && fetchedVodEntry.hlsUrl) {\n              item.videoHlsUrl = fetchedVodEntry.hlsUrl;\n              //If video, saves video duration as a promise \n              getInitialVideoDuration(item.videoHlsUrl).then(data => item.videoDuration = data);\n            }\n\n          }\n        } catch (innerError) {\n          console.error(\"Error processing an item:\", innerError);\n        }\n        return item;\n      })\n    );\n\n    // Sort slider items by the 'order' field\n    sliderItems.sort((a, b) => a.order - b.order);\n\n    // Move the video item to the first position if it exists\n    const videoIndex = sliderItems.findIndex(item => item.videoHlsUrl);\n    if (videoIndex !== -1) {\n      const [videoItem] = sliderItems.splice(videoIndex, 1);\n      sliderItems.unshift(videoItem);\n    }\n\n    return sliderItems;\n\n  } catch (error) {\n    console.error(\"An error occurred while fetching slider items:\", error);\n    return [];\n  }\n};\n\n//initializes video metadata to pull first item/video duration\nconst getInitialVideoDuration = async (url) => {\n\n  return new Promise((resolve, reject) => {\n      const player = document.createElement('video');\n      const video = Video(player)\n      video.src({ src: url, type: \"application/x-mpegURL\" });\n      // console.log('player slider js', player)\n\n      player.addEventListener('loadedmetadata', function() {\n        resolve(this.duration)\n      });\n\n      player.addEventListener('error', function(){\n        reject(new Error('Error retrieving video duration from metadata'))\n      })\n  })\n};","var getPrototypeOf = require(\"./getPrototypeOf.js\");\nvar setPrototypeOf = require(\"./setPrototypeOf.js\");\nvar isNativeFunction = require(\"./isNativeFunction.js\");\nvar construct = require(\"./construct.js\");\nfunction _wrapNativeSuper(Class) {\n  var _cache = typeof Map === \"function\" ? new Map() : undefined;\n  module.exports = _wrapNativeSuper = function _wrapNativeSuper(Class) {\n    if (Class === null || !isNativeFunction(Class)) return Class;\n    if (typeof Class !== \"function\") {\n      throw new TypeError(\"Super expression must either be null or a function\");\n    }\n    if (typeof _cache !== \"undefined\") {\n      if (_cache.has(Class)) return _cache.get(Class);\n      _cache.set(Class, Wrapper);\n    }\n    function Wrapper() {\n      return construct(Class, arguments, getPrototypeOf(this).constructor);\n    }\n    Wrapper.prototype = Object.create(Class.prototype, {\n      constructor: {\n        value: Wrapper,\n        enumerable: false,\n        writable: true,\n        configurable: true\n      }\n    });\n    return setPrototypeOf(Wrapper, Class);\n  }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  return _wrapNativeSuper(Class);\n}\nmodule.exports = _wrapNativeSuper, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","function _extends() {\n  module.exports = _extends = Object.assign ? Object.assign.bind() : function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n    return target;\n  }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  return _extends.apply(this, arguments);\n}\nmodule.exports = _extends, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","var MAX_UINT32 = Math.pow(2, 32);\n\nvar getUint64 = function(uint8) {\n  var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n  var value;\n\n  if (dv.getBigUint64) {\n    value = dv.getBigUint64(0);\n\n    if (value < Number.MAX_SAFE_INTEGER) {\n      return Number(value);\n    }\n\n    return value;\n  }\n\n  return (dv.getUint32(0) * MAX_UINT32) + dv.getUint32(4);\n};\n\nmodule.exports = {\n  getUint64: getUint64,\n  MAX_UINT32: MAX_UINT32\n};\n","'use strict';\nvar isObject = require('../internals/is-object');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\n// `InstallErrorCause` abstract operation\n// https://tc39.es/proposal-error-cause/#sec-errorobjects-install-error-cause\nmodule.exports = function (O, options) {\n  if (isObject(options) && 'cause' in options) {\n    createNonEnumerableProperty(O, 'cause', options.cause);\n  }\n};\n","'use strict';\nvar defineProperty = require('../internals/object-define-property').f;\n\nmodule.exports = function (Target, Source, key) {\n  key in Target || defineProperty(Target, key, {\n    configurable: true,\n    get: function () { return Source[key]; },\n    set: function (it) { Source[key] = it; }\n  });\n};\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": 1,\n  \"lr\": 1,\n  \"rl\": 1\n};\nvar alignSetting = {\n  \"start\": 1,\n  \"center\": 1,\n  \"end\": 1,\n  \"left\": 1,\n  \"right\": 1,\n  \"auto\": 1,\n  \"line-left\": 1,\n  \"line-right\": 1\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  this.hasBeenReset = false;\n\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = \"auto\";\n  var _positionAlign = \"auto\";\n  var _size = 100;\n  var _align = \"center\";\n\n  Object.defineProperties(this, {\n    \"id\": {\n      enumerable: true,\n      get: function() {\n        return _id;\n      },\n      set: function(value) {\n        _id = \"\" + value;\n      }\n    },\n\n    \"pauseOnExit\": {\n      enumerable: true,\n      get: function() {\n        return _pauseOnExit;\n      },\n      set: function(value) {\n        _pauseOnExit = !!value;\n      }\n    },\n\n    \"startTime\": {\n      enumerable: true,\n      get: function() {\n        return _startTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"endTime\": {\n      enumerable: true,\n      get: function() {\n        return _endTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"text\": {\n      enumerable: true,\n      get: function() {\n        return _text;\n      },\n      set: function(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"region\": {\n      enumerable: true,\n      get: function() {\n        return _region;\n      },\n      set: function(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"vertical\": {\n      enumerable: true,\n      get: function() {\n        return _vertical;\n      },\n      set: function(value) {\n        var setting = findDirectionSetting(value);\n        // Have to check for false because the setting an be an empty string.\n        if (setting === false) {\n          throw new SyntaxError(\"Vertical: an invalid or illegal direction string was specified.\");\n        }\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"snapToLines\": {\n      enumerable: true,\n      get: function() {\n        return _snapToLines;\n      },\n      set: function(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"line\": {\n      enumerable: true,\n      get: function() {\n        return _line;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"Line: an invalid number or illegal string was specified.\");\n        }\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"lineAlign\": {\n      enumerable: true,\n      get: function() {\n        return _lineAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"lineAlign: an invalid or illegal string was specified.\");\n        } else {\n          _lineAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"position\": {\n      enumerable: true,\n      get: function() {\n        return _position;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"positionAlign\": {\n      enumerable: true,\n      get: function() {\n        return _positionAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"positionAlign: an invalid or illegal string was specified.\");\n        } else {\n          _positionAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"size\": {\n      enumerable: true,\n      get: function() {\n        return _size;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"align\": {\n      enumerable: true,\n      get: function() {\n        return _align;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"align: an invalid or illegal alignment string was specified.\");\n        }\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }\n  });\n\n  /**\n   * Other <track> spec defined properties\n   */\n\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n  this.displayState = undefined;\n}\n\n/**\n * VTTCue methods\n */\n\nVTTCue.prototype.getCueAsHTML = function() {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;\n","var conventions = require(\"./conventions\");\nvar dom = require('./dom')\nvar entities = require('./entities');\nvar sax = require('./sax');\n\nvar DOMImplementation = dom.DOMImplementation;\n\nvar NAMESPACE = conventions.NAMESPACE;\n\nvar ParseError = sax.ParseError;\nvar XMLReader = sax.XMLReader;\n\n/**\n * Normalizes line ending according to https://www.w3.org/TR/xml11/#sec-line-ends:\n *\n * > XML parsed entities are often stored in computer files which,\n * > for editing convenience, are organized into lines.\n * > These lines are typically separated by some combination\n * > of the characters CARRIAGE RETURN (#xD) and LINE FEED (#xA).\n * >\n * > To simplify the tasks of applications, the XML processor must behave\n * > as if it normalized all line breaks in external parsed entities (including the document entity)\n * > on input, before parsing, by translating all of the following to a single #xA character:\n * >\n * > 1. the two-character sequence #xD #xA\n * > 2. the two-character sequence #xD #x85\n * > 3. the single character #x85\n * > 4. the single character #x2028\n * > 5. any #xD character that is not immediately followed by #xA or #x85.\n *\n * @param {string} input\n * @returns {string}\n */\nfunction normalizeLineEndings(input) {\n\treturn input\n\t\t.replace(/\\r[\\n\\u0085]/g, '\\n')\n\t\t.replace(/[\\r\\u0085\\u2028]/g, '\\n')\n}\n\n/**\n * @typedef Locator\n * @property {number} [columnNumber]\n * @property {number} [lineNumber]\n */\n\n/**\n * @typedef DOMParserOptions\n * @property {DOMHandler} [domBuilder]\n * @property {Function} [errorHandler]\n * @property {(string) => string} [normalizeLineEndings] used to replace line endings before parsing\n * \t\t\t\t\t\tdefaults to `normalizeLineEndings`\n * @property {Locator} [locator]\n * @property {Record<string, string>} [xmlns]\n *\n * @see normalizeLineEndings\n */\n\n/**\n * The DOMParser interface provides the ability to parse XML or HTML source code\n * from a string into a DOM `Document`.\n *\n * _xmldom is different from the spec in that it allows an `options` parameter,\n * to override the default behavior._\n *\n * @param {DOMParserOptions} [options]\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-parsing-and-serialization\n */\nfunction DOMParser(options){\n\tthis.options = options ||{locator:{}};\n}\n\nDOMParser.prototype.parseFromString = function(source,mimeType){\n\tvar options = this.options;\n\tvar sax =  new XMLReader();\n\tvar domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler\n\tvar errorHandler = options.errorHandler;\n\tvar locator = options.locator;\n\tvar defaultNSMap = options.xmlns||{};\n\tvar isHTML = /\\/x?html?$/.test(mimeType);//mimeType.toLowerCase().indexOf('html') > -1;\n  \tvar entityMap = isHTML ? entities.HTML_ENTITIES : entities.XML_ENTITIES;\n\tif(locator){\n\t\tdomBuilder.setDocumentLocator(locator)\n\t}\n\n\tsax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);\n\tsax.domBuilder = options.domBuilder || domBuilder;\n\tif(isHTML){\n\t\tdefaultNSMap[''] = NAMESPACE.HTML;\n\t}\n\tdefaultNSMap.xml = defaultNSMap.xml || NAMESPACE.XML;\n\tvar normalize = options.normalizeLineEndings || normalizeLineEndings;\n\tif (source && typeof source === 'string') {\n\t\tsax.parse(\n\t\t\tnormalize(source),\n\t\t\tdefaultNSMap,\n\t\t\tentityMap\n\t\t)\n\t} else {\n\t\tsax.errorHandler.error('invalid doc source')\n\t}\n\treturn domBuilder.doc;\n}\nfunction buildErrorHandler(errorImpl,domBuilder,locator){\n\tif(!errorImpl){\n\t\tif(domBuilder instanceof DOMHandler){\n\t\t\treturn domBuilder;\n\t\t}\n\t\terrorImpl = domBuilder ;\n\t}\n\tvar errorHandler = {}\n\tvar isCallback = errorImpl instanceof Function;\n\tlocator = locator||{}\n\tfunction build(key){\n\t\tvar fn = errorImpl[key];\n\t\tif(!fn && isCallback){\n\t\t\tfn = errorImpl.length == 2?function(msg){errorImpl(key,msg)}:errorImpl;\n\t\t}\n\t\terrorHandler[key] = fn && function(msg){\n\t\t\tfn('[xmldom '+key+']\\t'+msg+_locator(locator));\n\t\t}||function(){};\n\t}\n\tbuild('warning');\n\tbuild('error');\n\tbuild('fatalError');\n\treturn errorHandler;\n}\n\n//console.log('#\\n\\n\\n\\n\\n\\n\\n####')\n/**\n * +ContentHandler+ErrorHandler\n * +LexicalHandler+EntityResolver2\n * -DeclHandler-DTDHandler\n *\n * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler\n * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2\n * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html\n */\nfunction DOMHandler() {\n    this.cdata = false;\n}\nfunction position(locator,node){\n\tnode.lineNumber = locator.lineNumber;\n\tnode.columnNumber = locator.columnNumber;\n}\n/**\n * @see org.xml.sax.ContentHandler#startDocument\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html\n */\nDOMHandler.prototype = {\n\tstartDocument : function() {\n    \tthis.doc = new DOMImplementation().createDocument(null, null, null);\n    \tif (this.locator) {\n        \tthis.doc.documentURI = this.locator.systemId;\n    \t}\n\t},\n\tstartElement:function(namespaceURI, localName, qName, attrs) {\n\t\tvar doc = this.doc;\n\t    var el = doc.createElementNS(namespaceURI, qName||localName);\n\t    var len = attrs.length;\n\t    appendElement(this, el);\n\t    this.currentElement = el;\n\n\t\tthis.locator && position(this.locator,el)\n\t    for (var i = 0 ; i < len; i++) {\n\t        var namespaceURI = attrs.getURI(i);\n\t        var value = attrs.getValue(i);\n\t        var qName = attrs.getQName(i);\n\t\t\tvar attr = doc.createAttributeNS(namespaceURI, qName);\n\t\t\tthis.locator &&position(attrs.getLocator(i),attr);\n\t\t\tattr.value = attr.nodeValue = value;\n\t\t\tel.setAttributeNode(attr)\n\t    }\n\t},\n\tendElement:function(namespaceURI, localName, qName) {\n\t\tvar current = this.currentElement\n\t\tvar tagName = current.tagName;\n\t\tthis.currentElement = current.parentNode;\n\t},\n\tstartPrefixMapping:function(prefix, uri) {\n\t},\n\tendPrefixMapping:function(prefix) {\n\t},\n\tprocessingInstruction:function(target, data) {\n\t    var ins = this.doc.createProcessingInstruction(target, data);\n\t    this.locator && position(this.locator,ins)\n\t    appendElement(this, ins);\n\t},\n\tignorableWhitespace:function(ch, start, length) {\n\t},\n\tcharacters:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t\t//console.log(chars)\n\t\tif(chars){\n\t\t\tif (this.cdata) {\n\t\t\t\tvar charNode = this.doc.createCDATASection(chars);\n\t\t\t} else {\n\t\t\t\tvar charNode = this.doc.createTextNode(chars);\n\t\t\t}\n\t\t\tif(this.currentElement){\n\t\t\t\tthis.currentElement.appendChild(charNode);\n\t\t\t}else if(/^\\s*$/.test(chars)){\n\t\t\t\tthis.doc.appendChild(charNode);\n\t\t\t\t//process xml\n\t\t\t}\n\t\t\tthis.locator && position(this.locator,charNode)\n\t\t}\n\t},\n\tskippedEntity:function(name) {\n\t},\n\tendDocument:function() {\n\t\tthis.doc.normalize();\n\t},\n\tsetDocumentLocator:function (locator) {\n\t    if(this.locator = locator){// && !('lineNumber' in locator)){\n\t    \tlocator.lineNumber = 0;\n\t    }\n\t},\n\t//LexicalHandler\n\tcomment:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t    var comm = this.doc.createComment(chars);\n\t    this.locator && position(this.locator,comm)\n\t    appendElement(this, comm);\n\t},\n\n\tstartCDATA:function() {\n\t    //used in characters() methods\n\t    this.cdata = true;\n\t},\n\tendCDATA:function() {\n\t    this.cdata = false;\n\t},\n\n\tstartDTD:function(name, publicId, systemId) {\n\t\tvar impl = this.doc.implementation;\n\t    if (impl && impl.createDocumentType) {\n\t        var dt = impl.createDocumentType(name, publicId, systemId);\n\t        this.locator && position(this.locator,dt)\n\t        appendElement(this, dt);\n\t\t\t\t\tthis.doc.doctype = dt;\n\t    }\n\t},\n\t/**\n\t * @see org.xml.sax.ErrorHandler\n\t * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html\n\t */\n\twarning:function(error) {\n\t\tconsole.warn('[xmldom warning]\\t'+error,_locator(this.locator));\n\t},\n\terror:function(error) {\n\t\tconsole.error('[xmldom error]\\t'+error,_locator(this.locator));\n\t},\n\tfatalError:function(error) {\n\t\tthrow new ParseError(error, this.locator);\n\t}\n}\nfunction _locator(l){\n\tif(l){\n\t\treturn '\\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'\n\t}\n}\nfunction _toString(chars,start,length){\n\tif(typeof chars == 'string'){\n\t\treturn chars.substr(start,length)\n\t}else{//java sax connect width xmldom on rhino(what about: \"? && !(chars instanceof String)\")\n\t\tif(chars.length >= start+length || start){\n\t\t\treturn new java.lang.String(chars,start,length)+'';\n\t\t}\n\t\treturn chars;\n\t}\n}\n\n/*\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html\n * used method of org.xml.sax.ext.LexicalHandler:\n *  #comment(chars, start, length)\n *  #startCDATA()\n *  #endCDATA()\n *  #startDTD(name, publicId, systemId)\n *\n *\n * IGNORED method of org.xml.sax.ext.LexicalHandler:\n *  #endDTD()\n *  #startEntity(name)\n *  #endEntity(name)\n *\n *\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html\n * IGNORED method of org.xml.sax.ext.DeclHandler\n * \t#attributeDecl(eName, aName, type, mode, value)\n *  #elementDecl(name, model)\n *  #externalEntityDecl(name, publicId, systemId)\n *  #internalEntityDecl(name, value)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html\n * IGNORED method of org.xml.sax.EntityResolver2\n *  #resolveEntity(String name,String publicId,String baseURI,String systemId)\n *  #resolveEntity(publicId, systemId)\n *  #getExternalSubset(name, baseURI)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html\n * IGNORED method of org.xml.sax.DTDHandler\n *  #notationDecl(name, publicId, systemId) {};\n *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};\n */\n\"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl\".replace(/\\w+/g,function(key){\n\tDOMHandler.prototype[key] = function(){return null}\n})\n\n/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */\nfunction appendElement (hander,node) {\n    if (!hander.currentElement) {\n        hander.doc.appendChild(node);\n    } else {\n        hander.currentElement.appendChild(node);\n    }\n}//appendChild and setAttributeNS are preformance key\n\nexports.__DOMHandler = DOMHandler;\nexports.normalizeLineEndings = normalizeLineEndings;\nexports.DOMParser = DOMParser;\n","var setPrototypeOf = require(\"./setPrototypeOf.js\");\nvar isNativeReflectConstruct = require(\"./isNativeReflectConstruct.js\");\nfunction _construct(Parent, args, Class) {\n  if (isNativeReflectConstruct()) {\n    module.exports = _construct = Reflect.construct.bind(), module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  } else {\n    module.exports = _construct = function _construct(Parent, args, Class) {\n      var a = [null];\n      a.push.apply(a, args);\n      var Constructor = Function.bind.apply(Parent, a);\n      var instance = new Constructor();\n      if (Class) setPrototypeOf(instance, Class.prototype);\n      return instance;\n    }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n  }\n  return _construct.apply(null, arguments);\n}\nmodule.exports = _construct, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","'use strict';\n\nvar freeze = require('./conventions').freeze;\n\n/**\n * The entities that are predefined in every XML document.\n *\n * @see https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-predefined-ent W3C XML 1.1\n * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent W3C XML 1.0\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined_entities_in_XML Wikipedia\n */\nexports.XML_ENTITIES = freeze({\n\tamp: '&',\n\tapos: \"'\",\n\tgt: '>',\n\tlt: '<',\n\tquot: '\"',\n});\n\n/**\n * A map of all entities that are detected in an HTML document.\n * They contain all entries from `XML_ENTITIES`.\n *\n * @see XML_ENTITIES\n * @see DOMParser.parseFromString\n * @see DOMImplementation.prototype.createHTMLDocument\n * @see https://html.spec.whatwg.org/#named-character-references WHATWG HTML(5) Spec\n * @see https://html.spec.whatwg.org/entities.json JSON\n * @see https://www.w3.org/TR/xml-entity-names/ W3C XML Entity Names\n * @see https://www.w3.org/TR/html4/sgml/entities.html W3C HTML4/SGML\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_entity_references_in_HTML Wikipedia (HTML)\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Entities_representing_special_characters_in_XHTML Wikpedia (XHTML)\n */\nexports.HTML_ENTITIES = freeze({\n\tAacute: '\\u00C1',\n\taacute: '\\u00E1',\n\tAbreve: '\\u0102',\n\tabreve: '\\u0103',\n\tac: '\\u223E',\n\tacd: '\\u223F',\n\tacE: '\\u223E\\u0333',\n\tAcirc: '\\u00C2',\n\tacirc: '\\u00E2',\n\tacute: '\\u00B4',\n\tAcy: '\\u0410',\n\tacy: '\\u0430',\n\tAElig: '\\u00C6',\n\taelig: '\\u00E6',\n\taf: '\\u2061',\n\tAfr: '\\uD835\\uDD04',\n\tafr: '\\uD835\\uDD1E',\n\tAgrave: '\\u00C0',\n\tagrave: '\\u00E0',\n\talefsym: '\\u2135',\n\taleph: '\\u2135',\n\tAlpha: '\\u0391',\n\talpha: '\\u03B1',\n\tAmacr: '\\u0100',\n\tamacr: '\\u0101',\n\tamalg: '\\u2A3F',\n\tAMP: '\\u0026',\n\tamp: '\\u0026',\n\tAnd: '\\u2A53',\n\tand: '\\u2227',\n\tandand: '\\u2A55',\n\tandd: '\\u2A5C',\n\tandslope: '\\u2A58',\n\tandv: '\\u2A5A',\n\tang: '\\u2220',\n\tange: '\\u29A4',\n\tangle: '\\u2220',\n\tangmsd: '\\u2221',\n\tangmsdaa: '\\u29A8',\n\tangmsdab: '\\u29A9',\n\tangmsdac: '\\u29AA',\n\tangmsdad: '\\u29AB',\n\tangmsdae: '\\u29AC',\n\tangmsdaf: '\\u29AD',\n\tangmsdag: '\\u29AE',\n\tangmsdah: '\\u29AF',\n\tangrt: '\\u221F',\n\tangrtvb: '\\u22BE',\n\tangrtvbd: '\\u299D',\n\tangsph: '\\u2222',\n\tangst: '\\u00C5',\n\tangzarr: '\\u237C',\n\tAogon: '\\u0104',\n\taogon: '\\u0105',\n\tAopf: '\\uD835\\uDD38',\n\taopf: '\\uD835\\uDD52',\n\tap: '\\u2248',\n\tapacir: '\\u2A6F',\n\tapE: '\\u2A70',\n\tape: '\\u224A',\n\tapid: '\\u224B',\n\tapos: '\\u0027',\n\tApplyFunction: '\\u2061',\n\tapprox: '\\u2248',\n\tapproxeq: '\\u224A',\n\tAring: '\\u00C5',\n\taring: '\\u00E5',\n\tAscr: '\\uD835\\uDC9C',\n\tascr: '\\uD835\\uDCB6',\n\tAssign: '\\u2254',\n\tast: '\\u002A',\n\tasymp: '\\u2248',\n\tasympeq: '\\u224D',\n\tAtilde: '\\u00C3',\n\tatilde: '\\u00E3',\n\tAuml: '\\u00C4',\n\tauml: '\\u00E4',\n\tawconint: '\\u2233',\n\tawint: '\\u2A11',\n\tbackcong: '\\u224C',\n\tbackepsilon: '\\u03F6',\n\tbackprime: '\\u2035',\n\tbacksim: '\\u223D',\n\tbacksimeq: '\\u22CD',\n\tBackslash: '\\u2216',\n\tBarv: '\\u2AE7',\n\tbarvee: '\\u22BD',\n\tBarwed: '\\u2306',\n\tbarwed: '\\u2305',\n\tbarwedge: '\\u2305',\n\tbbrk: '\\u23B5',\n\tbbrktbrk: '\\u23B6',\n\tbcong: '\\u224C',\n\tBcy: '\\u0411',\n\tbcy: '\\u0431',\n\tbdquo: '\\u201E',\n\tbecaus: '\\u2235',\n\tBecause: '\\u2235',\n\tbecause: '\\u2235',\n\tbemptyv: '\\u29B0',\n\tbepsi: '\\u03F6',\n\tbernou: '\\u212C',\n\tBernoullis: '\\u212C',\n\tBeta: '\\u0392',\n\tbeta: '\\u03B2',\n\tbeth: '\\u2136',\n\tbetween: '\\u226C',\n\tBfr: '\\uD835\\uDD05',\n\tbfr: '\\uD835\\uDD1F',\n\tbigcap: '\\u22C2',\n\tbigcirc: '\\u25EF',\n\tbigcup: '\\u22C3',\n\tbigodot: '\\u2A00',\n\tbigoplus: '\\u2A01',\n\tbigotimes: '\\u2A02',\n\tbigsqcup: '\\u2A06',\n\tbigstar: '\\u2605',\n\tbigtriangledown: '\\u25BD',\n\tbigtriangleup: '\\u25B3',\n\tbiguplus: '\\u2A04',\n\tbigvee: '\\u22C1',\n\tbigwedge: '\\u22C0',\n\tbkarow: '\\u290D',\n\tblacklozenge: '\\u29EB',\n\tblacksquare: '\\u25AA',\n\tblacktriangle: '\\u25B4',\n\tblacktriangledown: '\\u25BE',\n\tblacktriangleleft: '\\u25C2',\n\tblacktriangleright: '\\u25B8',\n\tblank: '\\u2423',\n\tblk12: '\\u2592',\n\tblk14: '\\u2591',\n\tblk34: '\\u2593',\n\tblock: '\\u2588',\n\tbne: '\\u003D\\u20E5',\n\tbnequiv: '\\u2261\\u20E5',\n\tbNot: '\\u2AED',\n\tbnot: '\\u2310',\n\tBopf: '\\uD835\\uDD39',\n\tbopf: '\\uD835\\uDD53',\n\tbot: '\\u22A5',\n\tbottom: '\\u22A5',\n\tbowtie: '\\u22C8',\n\tboxbox: '\\u29C9',\n\tboxDL: '\\u2557',\n\tboxDl: '\\u2556',\n\tboxdL: '\\u2555',\n\tboxdl: '\\u2510',\n\tboxDR: '\\u2554',\n\tboxDr: '\\u2553',\n\tboxdR: '\\u2552',\n\tboxdr: '\\u250C',\n\tboxH: '\\u2550',\n\tboxh: '\\u2500',\n\tboxHD: '\\u2566',\n\tboxHd: '\\u2564',\n\tboxhD: '\\u2565',\n\tboxhd: '\\u252C',\n\tboxHU: '\\u2569',\n\tboxHu: '\\u2567',\n\tboxhU: '\\u2568',\n\tboxhu: '\\u2534',\n\tboxminus: '\\u229F',\n\tboxplus: '\\u229E',\n\tboxtimes: '\\u22A0',\n\tboxUL: '\\u255D',\n\tboxUl: '\\u255C',\n\tboxuL: '\\u255B',\n\tboxul: '\\u2518',\n\tboxUR: '\\u255A',\n\tboxUr: '\\u2559',\n\tboxuR: '\\u2558',\n\tboxur: '\\u2514',\n\tboxV: '\\u2551',\n\tboxv: '\\u2502',\n\tboxVH: '\\u256C',\n\tboxVh: '\\u256B',\n\tboxvH: '\\u256A',\n\tboxvh: '\\u253C',\n\tboxVL: '\\u2563',\n\tboxVl: '\\u2562',\n\tboxvL: '\\u2561',\n\tboxvl: '\\u2524',\n\tboxVR: '\\u2560',\n\tboxVr: '\\u255F',\n\tboxvR: '\\u255E',\n\tboxvr: '\\u251C',\n\tbprime: '\\u2035',\n\tBreve: '\\u02D8',\n\tbreve: '\\u02D8',\n\tbrvbar: '\\u00A6',\n\tBscr: '\\u212C',\n\tbscr: '\\uD835\\uDCB7',\n\tbsemi: '\\u204F',\n\tbsim: '\\u223D',\n\tbsime: '\\u22CD',\n\tbsol: '\\u005C',\n\tbsolb: '\\u29C5',\n\tbsolhsub: '\\u27C8',\n\tbull: '\\u2022',\n\tbullet: '\\u2022',\n\tbump: '\\u224E',\n\tbumpE: '\\u2AAE',\n\tbumpe: '\\u224F',\n\tBumpeq: '\\u224E',\n\tbumpeq: '\\u224F',\n\tCacute: '\\u0106',\n\tcacute: '\\u0107',\n\tCap: '\\u22D2',\n\tcap: '\\u2229',\n\tcapand: '\\u2A44',\n\tcapbrcup: '\\u2A49',\n\tcapcap: '\\u2A4B',\n\tcapcup: '\\u2A47',\n\tcapdot: '\\u2A40',\n\tCapitalDifferentialD: '\\u2145',\n\tcaps: '\\u2229\\uFE00',\n\tcaret: '\\u2041',\n\tcaron: '\\u02C7',\n\tCayleys: '\\u212D',\n\tccaps: '\\u2A4D',\n\tCcaron: '\\u010C',\n\tccaron: '\\u010D',\n\tCcedil: '\\u00C7',\n\tccedil: '\\u00E7',\n\tCcirc: '\\u0108',\n\tccirc: '\\u0109',\n\tCconint: '\\u2230',\n\tccups: '\\u2A4C',\n\tccupssm: '\\u2A50',\n\tCdot: '\\u010A',\n\tcdot: '\\u010B',\n\tcedil: '\\u00B8',\n\tCedilla: '\\u00B8',\n\tcemptyv: '\\u29B2',\n\tcent: '\\u00A2',\n\tCenterDot: '\\u00B7',\n\tcenterdot: '\\u00B7',\n\tCfr: '\\u212D',\n\tcfr: '\\uD835\\uDD20',\n\tCHcy: '\\u0427',\n\tchcy: '\\u0447',\n\tcheck: '\\u2713',\n\tcheckmark: '\\u2713',\n\tChi: '\\u03A7',\n\tchi: '\\u03C7',\n\tcir: '\\u25CB',\n\tcirc: '\\u02C6',\n\tcirceq: '\\u2257',\n\tcirclearrowleft: '\\u21BA',\n\tcirclearrowright: '\\u21BB',\n\tcircledast: '\\u229B',\n\tcircledcirc: '\\u229A',\n\tcircleddash: '\\u229D',\n\tCircleDot: '\\u2299',\n\tcircledR: '\\u00AE',\n\tcircledS: '\\u24C8',\n\tCircleMinus: '\\u2296',\n\tCirclePlus: '\\u2295',\n\tCircleTimes: '\\u2297',\n\tcirE: '\\u29C3',\n\tcire: '\\u2257',\n\tcirfnint: '\\u2A10',\n\tcirmid: '\\u2AEF',\n\tcirscir: '\\u29C2',\n\tClockwiseContourIntegral: '\\u2232',\n\tCloseCurlyDoubleQuote: '\\u201D',\n\tCloseCurlyQuote: '\\u2019',\n\tclubs: '\\u2663',\n\tclubsuit: '\\u2663',\n\tColon: '\\u2237',\n\tcolon: '\\u003A',\n\tColone: '\\u2A74',\n\tcolone: '\\u2254',\n\tcoloneq: '\\u2254',\n\tcomma: '\\u002C',\n\tcommat: '\\u0040',\n\tcomp: '\\u2201',\n\tcompfn: '\\u2218',\n\tcomplement: '\\u2201',\n\tcomplexes: '\\u2102',\n\tcong: '\\u2245',\n\tcongdot: '\\u2A6D',\n\tCongruent: '\\u2261',\n\tConint: '\\u222F',\n\tconint: '\\u222E',\n\tContourIntegral: '\\u222E',\n\tCopf: '\\u2102',\n\tcopf: '\\uD835\\uDD54',\n\tcoprod: '\\u2210',\n\tCoproduct: '\\u2210',\n\tCOPY: '\\u00A9',\n\tcopy: '\\u00A9',\n\tcopysr: '\\u2117',\n\tCounterClockwiseContourIntegral: '\\u2233',\n\tcrarr: '\\u21B5',\n\tCross: '\\u2A2F',\n\tcross: '\\u2717',\n\tCscr: '\\uD835\\uDC9E',\n\tcscr: '\\uD835\\uDCB8',\n\tcsub: '\\u2ACF',\n\tcsube: '\\u2AD1',\n\tcsup: '\\u2AD0',\n\tcsupe: '\\u2AD2',\n\tctdot: '\\u22EF',\n\tcudarrl: '\\u2938',\n\tcudarrr: '\\u2935',\n\tcuepr: '\\u22DE',\n\tcuesc: '\\u22DF',\n\tcularr: '\\u21B6',\n\tcularrp: '\\u293D',\n\tCup: '\\u22D3',\n\tcup: '\\u222A',\n\tcupbrcap: '\\u2A48',\n\tCupCap: '\\u224D',\n\tcupcap: '\\u2A46',\n\tcupcup: '\\u2A4A',\n\tcupdot: '\\u228D',\n\tcupor: '\\u2A45',\n\tcups: '\\u222A\\uFE00',\n\tcurarr: '\\u21B7',\n\tcurarrm: '\\u293C',\n\tcurlyeqprec: '\\u22DE',\n\tcurlyeqsucc: '\\u22DF',\n\tcurlyvee: '\\u22CE',\n\tcurlywedge: '\\u22CF',\n\tcurren: '\\u00A4',\n\tcurvearrowleft: '\\u21B6',\n\tcurvearrowright: '\\u21B7',\n\tcuvee: '\\u22CE',\n\tcuwed: '\\u22CF',\n\tcwconint: '\\u2232',\n\tcwint: '\\u2231',\n\tcylcty: '\\u232D',\n\tDagger: '\\u2021',\n\tdagger: '\\u2020',\n\tdaleth: '\\u2138',\n\tDarr: '\\u21A1',\n\tdArr: '\\u21D3',\n\tdarr: '\\u2193',\n\tdash: '\\u2010',\n\tDashv: '\\u2AE4',\n\tdashv: '\\u22A3',\n\tdbkarow: '\\u290F',\n\tdblac: '\\u02DD',\n\tDcaron: '\\u010E',\n\tdcaron: '\\u010F',\n\tDcy: '\\u0414',\n\tdcy: '\\u0434',\n\tDD: '\\u2145',\n\tdd: '\\u2146',\n\tddagger: '\\u2021',\n\tddarr: '\\u21CA',\n\tDDotrahd: '\\u2911',\n\tddotseq: '\\u2A77',\n\tdeg: '\\u00B0',\n\tDel: '\\u2207',\n\tDelta: '\\u0394',\n\tdelta: '\\u03B4',\n\tdemptyv: '\\u29B1',\n\tdfisht: '\\u297F',\n\tDfr: '\\uD835\\uDD07',\n\tdfr: '\\uD835\\uDD21',\n\tdHar: '\\u2965',\n\tdharl: '\\u21C3',\n\tdharr: '\\u21C2',\n\tDiacriticalAcute: '\\u00B4',\n\tDiacriticalDot: '\\u02D9',\n\tDiacriticalDoubleAcute: '\\u02DD',\n\tDiacriticalGrave: '\\u0060',\n\tDiacriticalTilde: '\\u02DC',\n\tdiam: '\\u22C4',\n\tDiamond: '\\u22C4',\n\tdiamond: '\\u22C4',\n\tdiamondsuit: '\\u2666',\n\tdiams: '\\u2666',\n\tdie: '\\u00A8',\n\tDifferentialD: '\\u2146',\n\tdigamma: '\\u03DD',\n\tdisin: '\\u22F2',\n\tdiv: '\\u00F7',\n\tdivide: '\\u00F7',\n\tdivideontimes: '\\u22C7',\n\tdivonx: '\\u22C7',\n\tDJcy: '\\u0402',\n\tdjcy: '\\u0452',\n\tdlcorn: '\\u231E',\n\tdlcrop: '\\u230D',\n\tdollar: '\\u0024',\n\tDopf: '\\uD835\\uDD3B',\n\tdopf: '\\uD835\\uDD55',\n\tDot: '\\u00A8',\n\tdot: '\\u02D9',\n\tDotDot: '\\u20DC',\n\tdoteq: '\\u2250',\n\tdoteqdot: '\\u2251',\n\tDotEqual: '\\u2250',\n\tdotminus: '\\u2238',\n\tdotplus: '\\u2214',\n\tdotsquare: '\\u22A1',\n\tdoublebarwedge: '\\u2306',\n\tDoubleContourIntegral: '\\u222F',\n\tDoubleDot: '\\u00A8',\n\tDoubleDownArrow: '\\u21D3',\n\tDoubleLeftArrow: '\\u21D0',\n\tDoubleLeftRightArrow: '\\u21D4',\n\tDoubleLeftTee: '\\u2AE4',\n\tDoubleLongLeftArrow: '\\u27F8',\n\tDoubleLongLeftRightArrow: '\\u27FA',\n\tDoubleLongRightArrow: '\\u27F9',\n\tDoubleRightArrow: '\\u21D2',\n\tDoubleRightTee: '\\u22A8',\n\tDoubleUpArrow: '\\u21D1',\n\tDoubleUpDownArrow: '\\u21D5',\n\tDoubleVerticalBar: '\\u2225',\n\tDownArrow: '\\u2193',\n\tDownarrow: '\\u21D3',\n\tdownarrow: '\\u2193',\n\tDownArrowBar: '\\u2913',\n\tDownArrowUpArrow: '\\u21F5',\n\tDownBreve: '\\u0311',\n\tdowndownarrows: '\\u21CA',\n\tdownharpoonleft: '\\u21C3',\n\tdownharpoonright: '\\u21C2',\n\tDownLeftRightVector: '\\u2950',\n\tDownLeftTeeVector: '\\u295E',\n\tDownLeftVector: '\\u21BD',\n\tDownLeftVectorBar: '\\u2956',\n\tDownRightTeeVector: '\\u295F',\n\tDownRightVector: '\\u21C1',\n\tDownRightVectorBar: '\\u2957',\n\tDownTee: '\\u22A4',\n\tDownTeeArrow: '\\u21A7',\n\tdrbkarow: '\\u2910',\n\tdrcorn: '\\u231F',\n\tdrcrop: '\\u230C',\n\tDscr: '\\uD835\\uDC9F',\n\tdscr: '\\uD835\\uDCB9',\n\tDScy: '\\u0405',\n\tdscy: '\\u0455',\n\tdsol: '\\u29F6',\n\tDstrok: '\\u0110',\n\tdstrok: '\\u0111',\n\tdtdot: '\\u22F1',\n\tdtri: '\\u25BF',\n\tdtrif: '\\u25BE',\n\tduarr: '\\u21F5',\n\tduhar: '\\u296F',\n\tdwangle: '\\u29A6',\n\tDZcy: '\\u040F',\n\tdzcy: '\\u045F',\n\tdzigrarr: '\\u27FF',\n\tEacute: '\\u00C9',\n\teacute: '\\u00E9',\n\teaster: '\\u2A6E',\n\tEcaron: '\\u011A',\n\tecaron: '\\u011B',\n\tecir: '\\u2256',\n\tEcirc: '\\u00CA',\n\tecirc: '\\u00EA',\n\tecolon: '\\u2255',\n\tEcy: '\\u042D',\n\tecy: '\\u044D',\n\teDDot: '\\u2A77',\n\tEdot: '\\u0116',\n\teDot: '\\u2251',\n\tedot: '\\u0117',\n\tee: '\\u2147',\n\tefDot: '\\u2252',\n\tEfr: '\\uD835\\uDD08',\n\tefr: '\\uD835\\uDD22',\n\teg: '\\u2A9A',\n\tEgrave: '\\u00C8',\n\tegrave: '\\u00E8',\n\tegs: '\\u2A96',\n\tegsdot: '\\u2A98',\n\tel: '\\u2A99',\n\tElement: '\\u2208',\n\telinters: '\\u23E7',\n\tell: '\\u2113',\n\tels: '\\u2A95',\n\telsdot: '\\u2A97',\n\tEmacr: '\\u0112',\n\temacr: '\\u0113',\n\tempty: '\\u2205',\n\temptyset: '\\u2205',\n\tEmptySmallSquare: '\\u25FB',\n\temptyv: '\\u2205',\n\tEmptyVerySmallSquare: '\\u25AB',\n\temsp: '\\u2003',\n\temsp13: '\\u2004',\n\temsp14: '\\u2005',\n\tENG: '\\u014A',\n\teng: '\\u014B',\n\tensp: '\\u2002',\n\tEogon: '\\u0118',\n\teogon: '\\u0119',\n\tEopf: '\\uD835\\uDD3C',\n\teopf: '\\uD835\\uDD56',\n\tepar: '\\u22D5',\n\teparsl: '\\u29E3',\n\teplus: '\\u2A71',\n\tepsi: '\\u03B5',\n\tEpsilon: '\\u0395',\n\tepsilon: '\\u03B5',\n\tepsiv: '\\u03F5',\n\teqcirc: '\\u2256',\n\teqcolon: '\\u2255',\n\teqsim: '\\u2242',\n\teqslantgtr: '\\u2A96',\n\teqslantless: '\\u2A95',\n\tEqual: '\\u2A75',\n\tequals: '\\u003D',\n\tEqualTilde: '\\u2242',\n\tequest: '\\u225F',\n\tEquilibrium: '\\u21CC',\n\tequiv: '\\u2261',\n\tequivDD: '\\u2A78',\n\teqvparsl: '\\u29E5',\n\terarr: '\\u2971',\n\terDot: '\\u2253',\n\tEscr: '\\u2130',\n\tescr: '\\u212F',\n\tesdot: '\\u2250',\n\tEsim: '\\u2A73',\n\tesim: '\\u2242',\n\tEta: '\\u0397',\n\teta: '\\u03B7',\n\tETH: '\\u00D0',\n\teth: '\\u00F0',\n\tEuml: '\\u00CB',\n\teuml: '\\u00EB',\n\teuro: '\\u20AC',\n\texcl: '\\u0021',\n\texist: '\\u2203',\n\tExists: '\\u2203',\n\texpectation: '\\u2130',\n\tExponentialE: '\\u2147',\n\texponentiale: '\\u2147',\n\tfallingdotseq: '\\u2252',\n\tFcy: '\\u0424',\n\tfcy: '\\u0444',\n\tfemale: '\\u2640',\n\tffilig: '\\uFB03',\n\tfflig: '\\uFB00',\n\tffllig: '\\uFB04',\n\tFfr: '\\uD835\\uDD09',\n\tffr: '\\uD835\\uDD23',\n\tfilig: '\\uFB01',\n\tFilledSmallSquare: '\\u25FC',\n\tFilledVerySmallSquare: '\\u25AA',\n\tfjlig: '\\u0066\\u006A',\n\tflat: '\\u266D',\n\tfllig: '\\uFB02',\n\tfltns: '\\u25B1',\n\tfnof: '\\u0192',\n\tFopf: '\\uD835\\uDD3D',\n\tfopf: '\\uD835\\uDD57',\n\tForAll: '\\u2200',\n\tforall: '\\u2200',\n\tfork: '\\u22D4',\n\tforkv: '\\u2AD9',\n\tFouriertrf: '\\u2131',\n\tfpartint: '\\u2A0D',\n\tfrac12: '\\u00BD',\n\tfrac13: '\\u2153',\n\tfrac14: '\\u00BC',\n\tfrac15: '\\u2155',\n\tfrac16: '\\u2159',\n\tfrac18: '\\u215B',\n\tfrac23: '\\u2154',\n\tfrac25: '\\u2156',\n\tfrac34: '\\u00BE',\n\tfrac35: '\\u2157',\n\tfrac38: '\\u215C',\n\tfrac45: '\\u2158',\n\tfrac56: '\\u215A',\n\tfrac58: '\\u215D',\n\tfrac78: '\\u215E',\n\tfrasl: '\\u2044',\n\tfrown: '\\u2322',\n\tFscr: '\\u2131',\n\tfscr: '\\uD835\\uDCBB',\n\tgacute: '\\u01F5',\n\tGamma: '\\u0393',\n\tgamma: '\\u03B3',\n\tGammad: '\\u03DC',\n\tgammad: '\\u03DD',\n\tgap: '\\u2A86',\n\tGbreve: '\\u011E',\n\tgbreve: '\\u011F',\n\tGcedil: '\\u0122',\n\tGcirc: '\\u011C',\n\tgcirc: '\\u011D',\n\tGcy: '\\u0413',\n\tgcy: '\\u0433',\n\tGdot: '\\u0120',\n\tgdot: '\\u0121',\n\tgE: '\\u2267',\n\tge: '\\u2265',\n\tgEl: '\\u2A8C',\n\tgel: '\\u22DB',\n\tgeq: '\\u2265',\n\tgeqq: '\\u2267',\n\tgeqslant: '\\u2A7E',\n\tges: '\\u2A7E',\n\tgescc: '\\u2AA9',\n\tgesdot: '\\u2A80',\n\tgesdoto: '\\u2A82',\n\tgesdotol: '\\u2A84',\n\tgesl: '\\u22DB\\uFE00',\n\tgesles: '\\u2A94',\n\tGfr: '\\uD835\\uDD0A',\n\tgfr: '\\uD835\\uDD24',\n\tGg: '\\u22D9',\n\tgg: '\\u226B',\n\tggg: '\\u22D9',\n\tgimel: '\\u2137',\n\tGJcy: '\\u0403',\n\tgjcy: '\\u0453',\n\tgl: '\\u2277',\n\tgla: '\\u2AA5',\n\tglE: '\\u2A92',\n\tglj: '\\u2AA4',\n\tgnap: '\\u2A8A',\n\tgnapprox: '\\u2A8A',\n\tgnE: '\\u2269',\n\tgne: '\\u2A88',\n\tgneq: '\\u2A88',\n\tgneqq: '\\u2269',\n\tgnsim: '\\u22E7',\n\tGopf: '\\uD835\\uDD3E',\n\tgopf: '\\uD835\\uDD58',\n\tgrave: '\\u0060',\n\tGreaterEqual: '\\u2265',\n\tGreaterEqualLess: '\\u22DB',\n\tGreaterFullEqual: '\\u2267',\n\tGreaterGreater: '\\u2AA2',\n\tGreaterLess: '\\u2277',\n\tGreaterSlantEqual: '\\u2A7E',\n\tGreaterTilde: '\\u2273',\n\tGscr: '\\uD835\\uDCA2',\n\tgscr: '\\u210A',\n\tgsim: '\\u2273',\n\tgsime: '\\u2A8E',\n\tgsiml: '\\u2A90',\n\tGt: '\\u226B',\n\tGT: '\\u003E',\n\tgt: '\\u003E',\n\tgtcc: '\\u2AA7',\n\tgtcir: '\\u2A7A',\n\tgtdot: '\\u22D7',\n\tgtlPar: '\\u2995',\n\tgtquest: '\\u2A7C',\n\tgtrapprox: '\\u2A86',\n\tgtrarr: '\\u2978',\n\tgtrdot: '\\u22D7',\n\tgtreqless: '\\u22DB',\n\tgtreqqless: '\\u2A8C',\n\tgtrless: '\\u2277',\n\tgtrsim: '\\u2273',\n\tgvertneqq: '\\u2269\\uFE00',\n\tgvnE: '\\u2269\\uFE00',\n\tHacek: '\\u02C7',\n\thairsp: '\\u200A',\n\thalf: '\\u00BD',\n\thamilt: '\\u210B',\n\tHARDcy: '\\u042A',\n\thardcy: '\\u044A',\n\thArr: '\\u21D4',\n\tharr: '\\u2194',\n\tharrcir: '\\u2948',\n\tharrw: '\\u21AD',\n\tHat: '\\u005E',\n\thbar: '\\u210F',\n\tHcirc: '\\u0124',\n\thcirc: '\\u0125',\n\thearts: '\\u2665',\n\theartsuit: '\\u2665',\n\thellip: '\\u2026',\n\thercon: '\\u22B9',\n\tHfr: '\\u210C',\n\thfr: '\\uD835\\uDD25',\n\tHilbertSpace: '\\u210B',\n\thksearow: '\\u2925',\n\thkswarow: '\\u2926',\n\thoarr: '\\u21FF',\n\thomtht: '\\u223B',\n\thookleftarrow: '\\u21A9',\n\thookrightarrow: '\\u21AA',\n\tHopf: '\\u210D',\n\thopf: '\\uD835\\uDD59',\n\thorbar: '\\u2015',\n\tHorizontalLine: '\\u2500',\n\tHscr: '\\u210B',\n\thscr: '\\uD835\\uDCBD',\n\thslash: '\\u210F',\n\tHstrok: '\\u0126',\n\thstrok: '\\u0127',\n\tHumpDownHump: '\\u224E',\n\tHumpEqual: '\\u224F',\n\thybull: '\\u2043',\n\thyphen: '\\u2010',\n\tIacute: '\\u00CD',\n\tiacute: '\\u00ED',\n\tic: '\\u2063',\n\tIcirc: '\\u00CE',\n\ticirc: '\\u00EE',\n\tIcy: '\\u0418',\n\ticy: '\\u0438',\n\tIdot: '\\u0130',\n\tIEcy: '\\u0415',\n\tiecy: '\\u0435',\n\tiexcl: '\\u00A1',\n\tiff: '\\u21D4',\n\tIfr: '\\u2111',\n\tifr: '\\uD835\\uDD26',\n\tIgrave: '\\u00CC',\n\tigrave: '\\u00EC',\n\tii: '\\u2148',\n\tiiiint: '\\u2A0C',\n\tiiint: '\\u222D',\n\tiinfin: '\\u29DC',\n\tiiota: '\\u2129',\n\tIJlig: '\\u0132',\n\tijlig: '\\u0133',\n\tIm: '\\u2111',\n\tImacr: '\\u012A',\n\timacr: '\\u012B',\n\timage: '\\u2111',\n\tImaginaryI: '\\u2148',\n\timagline: '\\u2110',\n\timagpart: '\\u2111',\n\timath: '\\u0131',\n\timof: '\\u22B7',\n\timped: '\\u01B5',\n\tImplies: '\\u21D2',\n\tin: '\\u2208',\n\tincare: '\\u2105',\n\tinfin: '\\u221E',\n\tinfintie: '\\u29DD',\n\tinodot: '\\u0131',\n\tInt: '\\u222C',\n\tint: '\\u222B',\n\tintcal: '\\u22BA',\n\tintegers: '\\u2124',\n\tIntegral: '\\u222B',\n\tintercal: '\\u22BA',\n\tIntersection: '\\u22C2',\n\tintlarhk: '\\u2A17',\n\tintprod: '\\u2A3C',\n\tInvisibleComma: '\\u2063',\n\tInvisibleTimes: '\\u2062',\n\tIOcy: '\\u0401',\n\tiocy: '\\u0451',\n\tIogon: '\\u012E',\n\tiogon: '\\u012F',\n\tIopf: '\\uD835\\uDD40',\n\tiopf: '\\uD835\\uDD5A',\n\tIota: '\\u0399',\n\tiota: '\\u03B9',\n\tiprod: '\\u2A3C',\n\tiquest: '\\u00BF',\n\tIscr: '\\u2110',\n\tiscr: '\\uD835\\uDCBE',\n\tisin: '\\u2208',\n\tisindot: '\\u22F5',\n\tisinE: '\\u22F9',\n\tisins: '\\u22F4',\n\tisinsv: '\\u22F3',\n\tisinv: '\\u2208',\n\tit: '\\u2062',\n\tItilde: '\\u0128',\n\titilde: '\\u0129',\n\tIukcy: '\\u0406',\n\tiukcy: '\\u0456',\n\tIuml: '\\u00CF',\n\tiuml: '\\u00EF',\n\tJcirc: '\\u0134',\n\tjcirc: '\\u0135',\n\tJcy: '\\u0419',\n\tjcy: '\\u0439',\n\tJfr: '\\uD835\\uDD0D',\n\tjfr: '\\uD835\\uDD27',\n\tjmath: '\\u0237',\n\tJopf: '\\uD835\\uDD41',\n\tjopf: '\\uD835\\uDD5B',\n\tJscr: '\\uD835\\uDCA5',\n\tjscr: '\\uD835\\uDCBF',\n\tJsercy: '\\u0408',\n\tjsercy: '\\u0458',\n\tJukcy: '\\u0404',\n\tjukcy: '\\u0454',\n\tKappa: '\\u039A',\n\tkappa: '\\u03BA',\n\tkappav: '\\u03F0',\n\tKcedil: '\\u0136',\n\tkcedil: '\\u0137',\n\tKcy: '\\u041A',\n\tkcy: '\\u043A',\n\tKfr: '\\uD835\\uDD0E',\n\tkfr: '\\uD835\\uDD28',\n\tkgreen: '\\u0138',\n\tKHcy: '\\u0425',\n\tkhcy: '\\u0445',\n\tKJcy: '\\u040C',\n\tkjcy: '\\u045C',\n\tKopf: '\\uD835\\uDD42',\n\tkopf: '\\uD835\\uDD5C',\n\tKscr: '\\uD835\\uDCA6',\n\tkscr: '\\uD835\\uDCC0',\n\tlAarr: '\\u21DA',\n\tLacute: '\\u0139',\n\tlacute: '\\u013A',\n\tlaemptyv: '\\u29B4',\n\tlagran: '\\u2112',\n\tLambda: '\\u039B',\n\tlambda: '\\u03BB',\n\tLang: '\\u27EA',\n\tlang: '\\u27E8',\n\tlangd: '\\u2991',\n\tlangle: '\\u27E8',\n\tlap: '\\u2A85',\n\tLaplacetrf: '\\u2112',\n\tlaquo: '\\u00AB',\n\tLarr: '\\u219E',\n\tlArr: '\\u21D0',\n\tlarr: '\\u2190',\n\tlarrb: '\\u21E4',\n\tlarrbfs: '\\u291F',\n\tlarrfs: '\\u291D',\n\tlarrhk: '\\u21A9',\n\tlarrlp: '\\u21AB',\n\tlarrpl: '\\u2939',\n\tlarrsim: '\\u2973',\n\tlarrtl: '\\u21A2',\n\tlat: '\\u2AAB',\n\tlAtail: '\\u291B',\n\tlatail: '\\u2919',\n\tlate: '\\u2AAD',\n\tlates: '\\u2AAD\\uFE00',\n\tlBarr: '\\u290E',\n\tlbarr: '\\u290C',\n\tlbbrk: '\\u2772',\n\tlbrace: '\\u007B',\n\tlbrack: '\\u005B',\n\tlbrke: '\\u298B',\n\tlbrksld: '\\u298F',\n\tlbrkslu: '\\u298D',\n\tLcaron: '\\u013D',\n\tlcaron: '\\u013E',\n\tLcedil: '\\u013B',\n\tlcedil: '\\u013C',\n\tlceil: '\\u2308',\n\tlcub: '\\u007B',\n\tLcy: '\\u041B',\n\tlcy: '\\u043B',\n\tldca: '\\u2936',\n\tldquo: '\\u201C',\n\tldquor: '\\u201E',\n\tldrdhar: '\\u2967',\n\tldrushar: '\\u294B',\n\tldsh: '\\u21B2',\n\tlE: '\\u2266',\n\tle: '\\u2264',\n\tLeftAngleBracket: '\\u27E8',\n\tLeftArrow: '\\u2190',\n\tLeftarrow: '\\u21D0',\n\tleftarrow: '\\u2190',\n\tLeftArrowBar: '\\u21E4',\n\tLeftArrowRightArrow: '\\u21C6',\n\tleftarrowtail: '\\u21A2',\n\tLeftCeiling: '\\u2308',\n\tLeftDoubleBracket: '\\u27E6',\n\tLeftDownTeeVector: '\\u2961',\n\tLeftDownVector: '\\u21C3',\n\tLeftDownVectorBar: '\\u2959',\n\tLeftFloor: '\\u230A',\n\tleftharpoondown: '\\u21BD',\n\tleftharpoonup: '\\u21BC',\n\tleftleftarrows: '\\u21C7',\n\tLeftRightArrow: '\\u2194',\n\tLeftrightarrow: '\\u21D4',\n\tleftrightarrow: '\\u2194',\n\tleftrightarrows: '\\u21C6',\n\tleftrightharpoons: '\\u21CB',\n\tleftrightsquigarrow: '\\u21AD',\n\tLeftRightVector: '\\u294E',\n\tLeftTee: '\\u22A3',\n\tLeftTeeArrow: '\\u21A4',\n\tLeftTeeVector: '\\u295A',\n\tleftthreetimes: '\\u22CB',\n\tLeftTriangle: '\\u22B2',\n\tLeftTriangleBar: '\\u29CF',\n\tLeftTriangleEqual: '\\u22B4',\n\tLeftUpDownVector: '\\u2951',\n\tLeftUpTeeVector: '\\u2960',\n\tLeftUpVector: '\\u21BF',\n\tLeftUpVectorBar: '\\u2958',\n\tLeftVector: '\\u21BC',\n\tLeftVectorBar: '\\u2952',\n\tlEg: '\\u2A8B',\n\tleg: '\\u22DA',\n\tleq: '\\u2264',\n\tleqq: '\\u2266',\n\tleqslant: '\\u2A7D',\n\tles: '\\u2A7D',\n\tlescc: '\\u2AA8',\n\tlesdot: '\\u2A7F',\n\tlesdoto: '\\u2A81',\n\tlesdotor: '\\u2A83',\n\tlesg: '\\u22DA\\uFE00',\n\tlesges: '\\u2A93',\n\tlessapprox: '\\u2A85',\n\tlessdot: '\\u22D6',\n\tlesseqgtr: '\\u22DA',\n\tlesseqqgtr: '\\u2A8B',\n\tLessEqualGreater: '\\u22DA',\n\tLessFullEqual: '\\u2266',\n\tLessGreater: '\\u2276',\n\tlessgtr: '\\u2276',\n\tLessLess: '\\u2AA1',\n\tlesssim: '\\u2272',\n\tLessSlantEqual: '\\u2A7D',\n\tLessTilde: '\\u2272',\n\tlfisht: '\\u297C',\n\tlfloor: '\\u230A',\n\tLfr: '\\uD835\\uDD0F',\n\tlfr: '\\uD835\\uDD29',\n\tlg: '\\u2276',\n\tlgE: '\\u2A91',\n\tlHar: '\\u2962',\n\tlhard: '\\u21BD',\n\tlharu: '\\u21BC',\n\tlharul: '\\u296A',\n\tlhblk: '\\u2584',\n\tLJcy: '\\u0409',\n\tljcy: '\\u0459',\n\tLl: '\\u22D8',\n\tll: '\\u226A',\n\tllarr: '\\u21C7',\n\tllcorner: '\\u231E',\n\tLleftarrow: '\\u21DA',\n\tllhard: '\\u296B',\n\tlltri: '\\u25FA',\n\tLmidot: '\\u013F',\n\tlmidot: '\\u0140',\n\tlmoust: '\\u23B0',\n\tlmoustache: '\\u23B0',\n\tlnap: '\\u2A89',\n\tlnapprox: '\\u2A89',\n\tlnE: '\\u2268',\n\tlne: '\\u2A87',\n\tlneq: '\\u2A87',\n\tlneqq: '\\u2268',\n\tlnsim: '\\u22E6',\n\tloang: '\\u27EC',\n\tloarr: '\\u21FD',\n\tlobrk: '\\u27E6',\n\tLongLeftArrow: '\\u27F5',\n\tLongleftarrow: '\\u27F8',\n\tlongleftarrow: '\\u27F5',\n\tLongLeftRightArrow: '\\u27F7',\n\tLongleftrightarrow: '\\u27FA',\n\tlongleftrightarrow: '\\u27F7',\n\tlongmapsto: '\\u27FC',\n\tLongRightArrow: '\\u27F6',\n\tLongrightarrow: '\\u27F9',\n\tlongrightarrow: '\\u27F6',\n\tlooparrowleft: '\\u21AB',\n\tlooparrowright: '\\u21AC',\n\tlopar: '\\u2985',\n\tLopf: '\\uD835\\uDD43',\n\tlopf: '\\uD835\\uDD5D',\n\tloplus: '\\u2A2D',\n\tlotimes: '\\u2A34',\n\tlowast: '\\u2217',\n\tlowbar: '\\u005F',\n\tLowerLeftArrow: '\\u2199',\n\tLowerRightArrow: '\\u2198',\n\tloz: '\\u25CA',\n\tlozenge: '\\u25CA',\n\tlozf: '\\u29EB',\n\tlpar: '\\u0028',\n\tlparlt: '\\u2993',\n\tlrarr: '\\u21C6',\n\tlrcorner: '\\u231F',\n\tlrhar: '\\u21CB',\n\tlrhard: '\\u296D',\n\tlrm: '\\u200E',\n\tlrtri: '\\u22BF',\n\tlsaquo: '\\u2039',\n\tLscr: '\\u2112',\n\tlscr: '\\uD835\\uDCC1',\n\tLsh: '\\u21B0',\n\tlsh: '\\u21B0',\n\tlsim: '\\u2272',\n\tlsime: '\\u2A8D',\n\tlsimg: '\\u2A8F',\n\tlsqb: '\\u005B',\n\tlsquo: '\\u2018',\n\tlsquor: '\\u201A',\n\tLstrok: '\\u0141',\n\tlstrok: '\\u0142',\n\tLt: '\\u226A',\n\tLT: '\\u003C',\n\tlt: '\\u003C',\n\tltcc: '\\u2AA6',\n\tltcir: '\\u2A79',\n\tltdot: '\\u22D6',\n\tlthree: '\\u22CB',\n\tltimes: '\\u22C9',\n\tltlarr: '\\u2976',\n\tltquest: '\\u2A7B',\n\tltri: '\\u25C3',\n\tltrie: '\\u22B4',\n\tltrif: '\\u25C2',\n\tltrPar: '\\u2996',\n\tlurdshar: '\\u294A',\n\tluruhar: '\\u2966',\n\tlvertneqq: '\\u2268\\uFE00',\n\tlvnE: '\\u2268\\uFE00',\n\tmacr: '\\u00AF',\n\tmale: '\\u2642',\n\tmalt: '\\u2720',\n\tmaltese: '\\u2720',\n\tMap: '\\u2905',\n\tmap: '\\u21A6',\n\tmapsto: '\\u21A6',\n\tmapstodown: '\\u21A7',\n\tmapstoleft: '\\u21A4',\n\tmapstoup: '\\u21A5',\n\tmarker: '\\u25AE',\n\tmcomma: '\\u2A29',\n\tMcy: '\\u041C',\n\tmcy: '\\u043C',\n\tmdash: '\\u2014',\n\tmDDot: '\\u223A',\n\tmeasuredangle: '\\u2221',\n\tMediumSpace: '\\u205F',\n\tMellintrf: '\\u2133',\n\tMfr: '\\uD835\\uDD10',\n\tmfr: '\\uD835\\uDD2A',\n\tmho: '\\u2127',\n\tmicro: '\\u00B5',\n\tmid: '\\u2223',\n\tmidast: '\\u002A',\n\tmidcir: '\\u2AF0',\n\tmiddot: '\\u00B7',\n\tminus: '\\u2212',\n\tminusb: '\\u229F',\n\tminusd: '\\u2238',\n\tminusdu: '\\u2A2A',\n\tMinusPlus: '\\u2213',\n\tmlcp: '\\u2ADB',\n\tmldr: '\\u2026',\n\tmnplus: '\\u2213',\n\tmodels: '\\u22A7',\n\tMopf: '\\uD835\\uDD44',\n\tmopf: '\\uD835\\uDD5E',\n\tmp: '\\u2213',\n\tMscr: '\\u2133',\n\tmscr: '\\uD835\\uDCC2',\n\tmstpos: '\\u223E',\n\tMu: '\\u039C',\n\tmu: '\\u03BC',\n\tmultimap: '\\u22B8',\n\tmumap: '\\u22B8',\n\tnabla: '\\u2207',\n\tNacute: '\\u0143',\n\tnacute: '\\u0144',\n\tnang: '\\u2220\\u20D2',\n\tnap: '\\u2249',\n\tnapE: '\\u2A70\\u0338',\n\tnapid: '\\u224B\\u0338',\n\tnapos: '\\u0149',\n\tnapprox: '\\u2249',\n\tnatur: '\\u266E',\n\tnatural: '\\u266E',\n\tnaturals: '\\u2115',\n\tnbsp: '\\u00A0',\n\tnbump: '\\u224E\\u0338',\n\tnbumpe: '\\u224F\\u0338',\n\tncap: '\\u2A43',\n\tNcaron: '\\u0147',\n\tncaron: '\\u0148',\n\tNcedil: '\\u0145',\n\tncedil: '\\u0146',\n\tncong: '\\u2247',\n\tncongdot: '\\u2A6D\\u0338',\n\tncup: '\\u2A42',\n\tNcy: '\\u041D',\n\tncy: '\\u043D',\n\tndash: '\\u2013',\n\tne: '\\u2260',\n\tnearhk: '\\u2924',\n\tneArr: '\\u21D7',\n\tnearr: '\\u2197',\n\tnearrow: '\\u2197',\n\tnedot: '\\u2250\\u0338',\n\tNegativeMediumSpace: '\\u200B',\n\tNegativeThickSpace: '\\u200B',\n\tNegativeThinSpace: '\\u200B',\n\tNegativeVeryThinSpace: '\\u200B',\n\tnequiv: '\\u2262',\n\tnesear: '\\u2928',\n\tnesim: '\\u2242\\u0338',\n\tNestedGreaterGreater: '\\u226B',\n\tNestedLessLess: '\\u226A',\n\tNewLine: '\\u000A',\n\tnexist: '\\u2204',\n\tnexists: '\\u2204',\n\tNfr: '\\uD835\\uDD11',\n\tnfr: '\\uD835\\uDD2B',\n\tngE: '\\u2267\\u0338',\n\tnge: '\\u2271',\n\tngeq: '\\u2271',\n\tngeqq: '\\u2267\\u0338',\n\tngeqslant: '\\u2A7E\\u0338',\n\tnges: '\\u2A7E\\u0338',\n\tnGg: '\\u22D9\\u0338',\n\tngsim: '\\u2275',\n\tnGt: '\\u226B\\u20D2',\n\tngt: '\\u226F',\n\tngtr: '\\u226F',\n\tnGtv: '\\u226B\\u0338',\n\tnhArr: '\\u21CE',\n\tnharr: '\\u21AE',\n\tnhpar: '\\u2AF2',\n\tni: '\\u220B',\n\tnis: '\\u22FC',\n\tnisd: '\\u22FA',\n\tniv: '\\u220B',\n\tNJcy: '\\u040A',\n\tnjcy: '\\u045A',\n\tnlArr: '\\u21CD',\n\tnlarr: '\\u219A',\n\tnldr: '\\u2025',\n\tnlE: '\\u2266\\u0338',\n\tnle: '\\u2270',\n\tnLeftarrow: '\\u21CD',\n\tnleftarrow: '\\u219A',\n\tnLeftrightarrow: '\\u21CE',\n\tnleftrightarrow: '\\u21AE',\n\tnleq: '\\u2270',\n\tnleqq: '\\u2266\\u0338',\n\tnleqslant: '\\u2A7D\\u0338',\n\tnles: '\\u2A7D\\u0338',\n\tnless: '\\u226E',\n\tnLl: '\\u22D8\\u0338',\n\tnlsim: '\\u2274',\n\tnLt: '\\u226A\\u20D2',\n\tnlt: '\\u226E',\n\tnltri: '\\u22EA',\n\tnltrie: '\\u22EC',\n\tnLtv: '\\u226A\\u0338',\n\tnmid: '\\u2224',\n\tNoBreak: '\\u2060',\n\tNonBreakingSpace: '\\u00A0',\n\tNopf: '\\u2115',\n\tnopf: '\\uD835\\uDD5F',\n\tNot: '\\u2AEC',\n\tnot: '\\u00AC',\n\tNotCongruent: '\\u2262',\n\tNotCupCap: '\\u226D',\n\tNotDoubleVerticalBar: '\\u2226',\n\tNotElement: '\\u2209',\n\tNotEqual: '\\u2260',\n\tNotEqualTilde: '\\u2242\\u0338',\n\tNotExists: '\\u2204',\n\tNotGreater: '\\u226F',\n\tNotGreaterEqual: '\\u2271',\n\tNotGreaterFullEqual: '\\u2267\\u0338',\n\tNotGreaterGreater: '\\u226B\\u0338',\n\tNotGreaterLess: '\\u2279',\n\tNotGreaterSlantEqual: '\\u2A7E\\u0338',\n\tNotGreaterTilde: '\\u2275',\n\tNotHumpDownHump: '\\u224E\\u0338',\n\tNotHumpEqual: '\\u224F\\u0338',\n\tnotin: '\\u2209',\n\tnotindot: '\\u22F5\\u0338',\n\tnotinE: '\\u22F9\\u0338',\n\tnotinva: '\\u2209',\n\tnotinvb: '\\u22F7',\n\tnotinvc: '\\u22F6',\n\tNotLeftTriangle: '\\u22EA',\n\tNotLeftTriangleBar: '\\u29CF\\u0338',\n\tNotLeftTriangleEqual: '\\u22EC',\n\tNotLess: '\\u226E',\n\tNotLessEqual: '\\u2270',\n\tNotLessGreater: '\\u2278',\n\tNotLessLess: '\\u226A\\u0338',\n\tNotLessSlantEqual: '\\u2A7D\\u0338',\n\tNotLessTilde: '\\u2274',\n\tNotNestedGreaterGreater: '\\u2AA2\\u0338',\n\tNotNestedLessLess: '\\u2AA1\\u0338',\n\tnotni: '\\u220C',\n\tnotniva: '\\u220C',\n\tnotnivb: '\\u22FE',\n\tnotnivc: '\\u22FD',\n\tNotPrecedes: '\\u2280',\n\tNotPrecedesEqual: '\\u2AAF\\u0338',\n\tNotPrecedesSlantEqual: '\\u22E0',\n\tNotReverseElement: '\\u220C',\n\tNotRightTriangle: '\\u22EB',\n\tNotRightTriangleBar: '\\u29D0\\u0338',\n\tNotRightTriangleEqual: '\\u22ED',\n\tNotSquareSubset: '\\u228F\\u0338',\n\tNotSquareSubsetEqual: '\\u22E2',\n\tNotSquareSuperset: '\\u2290\\u0338',\n\tNotSquareSupersetEqual: '\\u22E3',\n\tNotSubset: '\\u2282\\u20D2',\n\tNotSubsetEqual: '\\u2288',\n\tNotSucceeds: '\\u2281',\n\tNotSucceedsEqual: '\\u2AB0\\u0338',\n\tNotSucceedsSlantEqual: '\\u22E1',\n\tNotSucceedsTilde: '\\u227F\\u0338',\n\tNotSuperset: '\\u2283\\u20D2',\n\tNotSupersetEqual: '\\u2289',\n\tNotTilde: '\\u2241',\n\tNotTildeEqual: '\\u2244',\n\tNotTildeFullEqual: '\\u2247',\n\tNotTildeTilde: '\\u2249',\n\tNotVerticalBar: '\\u2224',\n\tnpar: '\\u2226',\n\tnparallel: '\\u2226',\n\tnparsl: '\\u2AFD\\u20E5',\n\tnpart: '\\u2202\\u0338',\n\tnpolint: '\\u2A14',\n\tnpr: '\\u2280',\n\tnprcue: '\\u22E0',\n\tnpre: '\\u2AAF\\u0338',\n\tnprec: '\\u2280',\n\tnpreceq: '\\u2AAF\\u0338',\n\tnrArr: '\\u21CF',\n\tnrarr: '\\u219B',\n\tnrarrc: '\\u2933\\u0338',\n\tnrarrw: '\\u219D\\u0338',\n\tnRightarrow: '\\u21CF',\n\tnrightarrow: '\\u219B',\n\tnrtri: '\\u22EB',\n\tnrtrie: '\\u22ED',\n\tnsc: '\\u2281',\n\tnsccue: '\\u22E1',\n\tnsce: '\\u2AB0\\u0338',\n\tNscr: '\\uD835\\uDCA9',\n\tnscr: '\\uD835\\uDCC3',\n\tnshortmid: '\\u2224',\n\tnshortparallel: '\\u2226',\n\tnsim: '\\u2241',\n\tnsime: '\\u2244',\n\tnsimeq: '\\u2244',\n\tnsmid: '\\u2224',\n\tnspar: '\\u2226',\n\tnsqsube: '\\u22E2',\n\tnsqsupe: '\\u22E3',\n\tnsub: '\\u2284',\n\tnsubE: '\\u2AC5\\u0338',\n\tnsube: '\\u2288',\n\tnsubset: '\\u2282\\u20D2',\n\tnsubseteq: '\\u2288',\n\tnsubseteqq: '\\u2AC5\\u0338',\n\tnsucc: '\\u2281',\n\tnsucceq: '\\u2AB0\\u0338',\n\tnsup: '\\u2285',\n\tnsupE: '\\u2AC6\\u0338',\n\tnsupe: '\\u2289',\n\tnsupset: '\\u2283\\u20D2',\n\tnsupseteq: '\\u2289',\n\tnsupseteqq: '\\u2AC6\\u0338',\n\tntgl: '\\u2279',\n\tNtilde: '\\u00D1',\n\tntilde: '\\u00F1',\n\tntlg: '\\u2278',\n\tntriangleleft: '\\u22EA',\n\tntrianglelefteq: '\\u22EC',\n\tntriangleright: '\\u22EB',\n\tntrianglerighteq: '\\u22ED',\n\tNu: '\\u039D',\n\tnu: '\\u03BD',\n\tnum: '\\u0023',\n\tnumero: '\\u2116',\n\tnumsp: '\\u2007',\n\tnvap: '\\u224D\\u20D2',\n\tnVDash: '\\u22AF',\n\tnVdash: '\\u22AE',\n\tnvDash: '\\u22AD',\n\tnvdash: '\\u22AC',\n\tnvge: '\\u2265\\u20D2',\n\tnvgt: '\\u003E\\u20D2',\n\tnvHarr: '\\u2904',\n\tnvinfin: '\\u29DE',\n\tnvlArr: '\\u2902',\n\tnvle: '\\u2264\\u20D2',\n\tnvlt: '\\u003C\\u20D2',\n\tnvltrie: '\\u22B4\\u20D2',\n\tnvrArr: '\\u2903',\n\tnvrtrie: '\\u22B5\\u20D2',\n\tnvsim: '\\u223C\\u20D2',\n\tnwarhk: '\\u2923',\n\tnwArr: '\\u21D6',\n\tnwarr: '\\u2196',\n\tnwarrow: '\\u2196',\n\tnwnear: '\\u2927',\n\tOacute: '\\u00D3',\n\toacute: '\\u00F3',\n\toast: '\\u229B',\n\tocir: '\\u229A',\n\tOcirc: '\\u00D4',\n\tocirc: '\\u00F4',\n\tOcy: '\\u041E',\n\tocy: '\\u043E',\n\todash: '\\u229D',\n\tOdblac: '\\u0150',\n\todblac: '\\u0151',\n\todiv: '\\u2A38',\n\todot: '\\u2299',\n\todsold: '\\u29BC',\n\tOElig: '\\u0152',\n\toelig: '\\u0153',\n\tofcir: '\\u29BF',\n\tOfr: '\\uD835\\uDD12',\n\tofr: '\\uD835\\uDD2C',\n\togon: '\\u02DB',\n\tOgrave: '\\u00D2',\n\tograve: '\\u00F2',\n\togt: '\\u29C1',\n\tohbar: '\\u29B5',\n\tohm: '\\u03A9',\n\toint: '\\u222E',\n\tolarr: '\\u21BA',\n\tolcir: '\\u29BE',\n\tolcross: '\\u29BB',\n\toline: '\\u203E',\n\tolt: '\\u29C0',\n\tOmacr: '\\u014C',\n\tomacr: '\\u014D',\n\tOmega: '\\u03A9',\n\tomega: '\\u03C9',\n\tOmicron: '\\u039F',\n\tomicron: '\\u03BF',\n\tomid: '\\u29B6',\n\tominus: '\\u2296',\n\tOopf: '\\uD835\\uDD46',\n\toopf: '\\uD835\\uDD60',\n\topar: '\\u29B7',\n\tOpenCurlyDoubleQuote: '\\u201C',\n\tOpenCurlyQuote: '\\u2018',\n\toperp: '\\u29B9',\n\toplus: '\\u2295',\n\tOr: '\\u2A54',\n\tor: '\\u2228',\n\torarr: '\\u21BB',\n\tord: '\\u2A5D',\n\torder: '\\u2134',\n\torderof: '\\u2134',\n\tordf: '\\u00AA',\n\tordm: '\\u00BA',\n\torigof: '\\u22B6',\n\toror: '\\u2A56',\n\torslope: '\\u2A57',\n\torv: '\\u2A5B',\n\toS: '\\u24C8',\n\tOscr: '\\uD835\\uDCAA',\n\toscr: '\\u2134',\n\tOslash: '\\u00D8',\n\toslash: '\\u00F8',\n\tosol: '\\u2298',\n\tOtilde: '\\u00D5',\n\totilde: '\\u00F5',\n\tOtimes: '\\u2A37',\n\totimes: '\\u2297',\n\totimesas: '\\u2A36',\n\tOuml: '\\u00D6',\n\touml: '\\u00F6',\n\tovbar: '\\u233D',\n\tOverBar: '\\u203E',\n\tOverBrace: '\\u23DE',\n\tOverBracket: '\\u23B4',\n\tOverParenthesis: '\\u23DC',\n\tpar: '\\u2225',\n\tpara: '\\u00B6',\n\tparallel: '\\u2225',\n\tparsim: '\\u2AF3',\n\tparsl: '\\u2AFD',\n\tpart: '\\u2202',\n\tPartialD: '\\u2202',\n\tPcy: '\\u041F',\n\tpcy: '\\u043F',\n\tpercnt: '\\u0025',\n\tperiod: '\\u002E',\n\tpermil: '\\u2030',\n\tperp: '\\u22A5',\n\tpertenk: '\\u2031',\n\tPfr: '\\uD835\\uDD13',\n\tpfr: '\\uD835\\uDD2D',\n\tPhi: '\\u03A6',\n\tphi: '\\u03C6',\n\tphiv: '\\u03D5',\n\tphmmat: '\\u2133',\n\tphone: '\\u260E',\n\tPi: '\\u03A0',\n\tpi: '\\u03C0',\n\tpitchfork: '\\u22D4',\n\tpiv: '\\u03D6',\n\tplanck: '\\u210F',\n\tplanckh: '\\u210E',\n\tplankv: '\\u210F',\n\tplus: '\\u002B',\n\tplusacir: '\\u2A23',\n\tplusb: '\\u229E',\n\tpluscir: '\\u2A22',\n\tplusdo: '\\u2214',\n\tplusdu: '\\u2A25',\n\tpluse: '\\u2A72',\n\tPlusMinus: '\\u00B1',\n\tplusmn: '\\u00B1',\n\tplussim: '\\u2A26',\n\tplustwo: '\\u2A27',\n\tpm: '\\u00B1',\n\tPoincareplane: '\\u210C',\n\tpointint: '\\u2A15',\n\tPopf: '\\u2119',\n\tpopf: '\\uD835\\uDD61',\n\tpound: '\\u00A3',\n\tPr: '\\u2ABB',\n\tpr: '\\u227A',\n\tprap: '\\u2AB7',\n\tprcue: '\\u227C',\n\tprE: '\\u2AB3',\n\tpre: '\\u2AAF',\n\tprec: '\\u227A',\n\tprecapprox: '\\u2AB7',\n\tpreccurlyeq: '\\u227C',\n\tPrecedes: '\\u227A',\n\tPrecedesEqual: '\\u2AAF',\n\tPrecedesSlantEqual: '\\u227C',\n\tPrecedesTilde: '\\u227E',\n\tpreceq: '\\u2AAF',\n\tprecnapprox: '\\u2AB9',\n\tprecneqq: '\\u2AB5',\n\tprecnsim: '\\u22E8',\n\tprecsim: '\\u227E',\n\tPrime: '\\u2033',\n\tprime: '\\u2032',\n\tprimes: '\\u2119',\n\tprnap: '\\u2AB9',\n\tprnE: '\\u2AB5',\n\tprnsim: '\\u22E8',\n\tprod: '\\u220F',\n\tProduct: '\\u220F',\n\tprofalar: '\\u232E',\n\tprofline: '\\u2312',\n\tprofsurf: '\\u2313',\n\tprop: '\\u221D',\n\tProportion: '\\u2237',\n\tProportional: '\\u221D',\n\tpropto: '\\u221D',\n\tprsim: '\\u227E',\n\tprurel: '\\u22B0',\n\tPscr: '\\uD835\\uDCAB',\n\tpscr: '\\uD835\\uDCC5',\n\tPsi: '\\u03A8',\n\tpsi: '\\u03C8',\n\tpuncsp: '\\u2008',\n\tQfr: '\\uD835\\uDD14',\n\tqfr: '\\uD835\\uDD2E',\n\tqint: '\\u2A0C',\n\tQopf: '\\u211A',\n\tqopf: '\\uD835\\uDD62',\n\tqprime: '\\u2057',\n\tQscr: '\\uD835\\uDCAC',\n\tqscr: '\\uD835\\uDCC6',\n\tquaternions: '\\u210D',\n\tquatint: '\\u2A16',\n\tquest: '\\u003F',\n\tquesteq: '\\u225F',\n\tQUOT: '\\u0022',\n\tquot: '\\u0022',\n\trAarr: '\\u21DB',\n\trace: '\\u223D\\u0331',\n\tRacute: '\\u0154',\n\tracute: '\\u0155',\n\tradic: '\\u221A',\n\traemptyv: '\\u29B3',\n\tRang: '\\u27EB',\n\trang: '\\u27E9',\n\trangd: '\\u2992',\n\trange: '\\u29A5',\n\trangle: '\\u27E9',\n\traquo: '\\u00BB',\n\tRarr: '\\u21A0',\n\trArr: '\\u21D2',\n\trarr: '\\u2192',\n\trarrap: '\\u2975',\n\trarrb: '\\u21E5',\n\trarrbfs: '\\u2920',\n\trarrc: '\\u2933',\n\trarrfs: '\\u291E',\n\trarrhk: '\\u21AA',\n\trarrlp: '\\u21AC',\n\trarrpl: '\\u2945',\n\trarrsim: '\\u2974',\n\tRarrtl: '\\u2916',\n\trarrtl: '\\u21A3',\n\trarrw: '\\u219D',\n\trAtail: '\\u291C',\n\tratail: '\\u291A',\n\tratio: '\\u2236',\n\trationals: '\\u211A',\n\tRBarr: '\\u2910',\n\trBarr: '\\u290F',\n\trbarr: '\\u290D',\n\trbbrk: '\\u2773',\n\trbrace: '\\u007D',\n\trbrack: '\\u005D',\n\trbrke: '\\u298C',\n\trbrksld: '\\u298E',\n\trbrkslu: '\\u2990',\n\tRcaron: '\\u0158',\n\trcaron: '\\u0159',\n\tRcedil: '\\u0156',\n\trcedil: '\\u0157',\n\trceil: '\\u2309',\n\trcub: '\\u007D',\n\tRcy: '\\u0420',\n\trcy: '\\u0440',\n\trdca: '\\u2937',\n\trdldhar: '\\u2969',\n\trdquo: '\\u201D',\n\trdquor: '\\u201D',\n\trdsh: '\\u21B3',\n\tRe: '\\u211C',\n\treal: '\\u211C',\n\trealine: '\\u211B',\n\trealpart: '\\u211C',\n\treals: '\\u211D',\n\trect: '\\u25AD',\n\tREG: '\\u00AE',\n\treg: '\\u00AE',\n\tReverseElement: '\\u220B',\n\tReverseEquilibrium: '\\u21CB',\n\tReverseUpEquilibrium: '\\u296F',\n\trfisht: '\\u297D',\n\trfloor: '\\u230B',\n\tRfr: '\\u211C',\n\trfr: '\\uD835\\uDD2F',\n\trHar: '\\u2964',\n\trhard: '\\u21C1',\n\trharu: '\\u21C0',\n\trharul: '\\u296C',\n\tRho: '\\u03A1',\n\trho: '\\u03C1',\n\trhov: '\\u03F1',\n\tRightAngleBracket: '\\u27E9',\n\tRightArrow: '\\u2192',\n\tRightarrow: '\\u21D2',\n\trightarrow: '\\u2192',\n\tRightArrowBar: '\\u21E5',\n\tRightArrowLeftArrow: '\\u21C4',\n\trightarrowtail: '\\u21A3',\n\tRightCeiling: '\\u2309',\n\tRightDoubleBracket: '\\u27E7',\n\tRightDownTeeVector: '\\u295D',\n\tRightDownVector: '\\u21C2',\n\tRightDownVectorBar: '\\u2955',\n\tRightFloor: '\\u230B',\n\trightharpoondown: '\\u21C1',\n\trightharpoonup: '\\u21C0',\n\trightleftarrows: '\\u21C4',\n\trightleftharpoons: '\\u21CC',\n\trightrightarrows: '\\u21C9',\n\trightsquigarrow: '\\u219D',\n\tRightTee: '\\u22A2',\n\tRightTeeArrow: '\\u21A6',\n\tRightTeeVector: '\\u295B',\n\trightthreetimes: '\\u22CC',\n\tRightTriangle: '\\u22B3',\n\tRightTriangleBar: '\\u29D0',\n\tRightTriangleEqual: '\\u22B5',\n\tRightUpDownVector: '\\u294F',\n\tRightUpTeeVector: '\\u295C',\n\tRightUpVector: '\\u21BE',\n\tRightUpVectorBar: '\\u2954',\n\tRightVector: '\\u21C0',\n\tRightVectorBar: '\\u2953',\n\tring: '\\u02DA',\n\trisingdotseq: '\\u2253',\n\trlarr: '\\u21C4',\n\trlhar: '\\u21CC',\n\trlm: '\\u200F',\n\trmoust: '\\u23B1',\n\trmoustache: '\\u23B1',\n\trnmid: '\\u2AEE',\n\troang: '\\u27ED',\n\troarr: '\\u21FE',\n\trobrk: '\\u27E7',\n\tropar: '\\u2986',\n\tRopf: '\\u211D',\n\tropf: '\\uD835\\uDD63',\n\troplus: '\\u2A2E',\n\trotimes: '\\u2A35',\n\tRoundImplies: '\\u2970',\n\trpar: '\\u0029',\n\trpargt: '\\u2994',\n\trppolint: '\\u2A12',\n\trrarr: '\\u21C9',\n\tRrightarrow: '\\u21DB',\n\trsaquo: '\\u203A',\n\tRscr: '\\u211B',\n\trscr: '\\uD835\\uDCC7',\n\tRsh: '\\u21B1',\n\trsh: '\\u21B1',\n\trsqb: '\\u005D',\n\trsquo: '\\u2019',\n\trsquor: '\\u2019',\n\trthree: '\\u22CC',\n\trtimes: '\\u22CA',\n\trtri: '\\u25B9',\n\trtrie: '\\u22B5',\n\trtrif: '\\u25B8',\n\trtriltri: '\\u29CE',\n\tRuleDelayed: '\\u29F4',\n\truluhar: '\\u2968',\n\trx: '\\u211E',\n\tSacute: '\\u015A',\n\tsacute: '\\u015B',\n\tsbquo: '\\u201A',\n\tSc: '\\u2ABC',\n\tsc: '\\u227B',\n\tscap: '\\u2AB8',\n\tScaron: '\\u0160',\n\tscaron: '\\u0161',\n\tsccue: '\\u227D',\n\tscE: '\\u2AB4',\n\tsce: '\\u2AB0',\n\tScedil: '\\u015E',\n\tscedil: '\\u015F',\n\tScirc: '\\u015C',\n\tscirc: '\\u015D',\n\tscnap: '\\u2ABA',\n\tscnE: '\\u2AB6',\n\tscnsim: '\\u22E9',\n\tscpolint: '\\u2A13',\n\tscsim: '\\u227F',\n\tScy: '\\u0421',\n\tscy: '\\u0441',\n\tsdot: '\\u22C5',\n\tsdotb: '\\u22A1',\n\tsdote: '\\u2A66',\n\tsearhk: '\\u2925',\n\tseArr: '\\u21D8',\n\tsearr: '\\u2198',\n\tsearrow: '\\u2198',\n\tsect: '\\u00A7',\n\tsemi: '\\u003B',\n\tseswar: '\\u2929',\n\tsetminus: '\\u2216',\n\tsetmn: '\\u2216',\n\tsext: '\\u2736',\n\tSfr: '\\uD835\\uDD16',\n\tsfr: '\\uD835\\uDD30',\n\tsfrown: '\\u2322',\n\tsharp: '\\u266F',\n\tSHCHcy: '\\u0429',\n\tshchcy: '\\u0449',\n\tSHcy: '\\u0428',\n\tshcy: '\\u0448',\n\tShortDownArrow: '\\u2193',\n\tShortLeftArrow: '\\u2190',\n\tshortmid: '\\u2223',\n\tshortparallel: '\\u2225',\n\tShortRightArrow: '\\u2192',\n\tShortUpArrow: '\\u2191',\n\tshy: '\\u00AD',\n\tSigma: '\\u03A3',\n\tsigma: '\\u03C3',\n\tsigmaf: '\\u03C2',\n\tsigmav: '\\u03C2',\n\tsim: '\\u223C',\n\tsimdot: '\\u2A6A',\n\tsime: '\\u2243',\n\tsimeq: '\\u2243',\n\tsimg: '\\u2A9E',\n\tsimgE: '\\u2AA0',\n\tsiml: '\\u2A9D',\n\tsimlE: '\\u2A9F',\n\tsimne: '\\u2246',\n\tsimplus: '\\u2A24',\n\tsimrarr: '\\u2972',\n\tslarr: '\\u2190',\n\tSmallCircle: '\\u2218',\n\tsmallsetminus: '\\u2216',\n\tsmashp: '\\u2A33',\n\tsmeparsl: '\\u29E4',\n\tsmid: '\\u2223',\n\tsmile: '\\u2323',\n\tsmt: '\\u2AAA',\n\tsmte: '\\u2AAC',\n\tsmtes: '\\u2AAC\\uFE00',\n\tSOFTcy: '\\u042C',\n\tsoftcy: '\\u044C',\n\tsol: '\\u002F',\n\tsolb: '\\u29C4',\n\tsolbar: '\\u233F',\n\tSopf: '\\uD835\\uDD4A',\n\tsopf: '\\uD835\\uDD64',\n\tspades: '\\u2660',\n\tspadesuit: '\\u2660',\n\tspar: '\\u2225',\n\tsqcap: '\\u2293',\n\tsqcaps: '\\u2293\\uFE00',\n\tsqcup: '\\u2294',\n\tsqcups: '\\u2294\\uFE00',\n\tSqrt: '\\u221A',\n\tsqsub: '\\u228F',\n\tsqsube: '\\u2291',\n\tsqsubset: '\\u228F',\n\tsqsubseteq: '\\u2291',\n\tsqsup: '\\u2290',\n\tsqsupe: '\\u2292',\n\tsqsupset: '\\u2290',\n\tsqsupseteq: '\\u2292',\n\tsqu: '\\u25A1',\n\tSquare: '\\u25A1',\n\tsquare: '\\u25A1',\n\tSquareIntersection: '\\u2293',\n\tSquareSubset: '\\u228F',\n\tSquareSubsetEqual: '\\u2291',\n\tSquareSuperset: '\\u2290',\n\tSquareSupersetEqual: '\\u2292',\n\tSquareUnion: '\\u2294',\n\tsquarf: '\\u25AA',\n\tsquf: '\\u25AA',\n\tsrarr: '\\u2192',\n\tSscr: '\\uD835\\uDCAE',\n\tsscr: '\\uD835\\uDCC8',\n\tssetmn: '\\u2216',\n\tssmile: '\\u2323',\n\tsstarf: '\\u22C6',\n\tStar: '\\u22C6',\n\tstar: '\\u2606',\n\tstarf: '\\u2605',\n\tstraightepsilon: '\\u03F5',\n\tstraightphi: '\\u03D5',\n\tstrns: '\\u00AF',\n\tSub: '\\u22D0',\n\tsub: '\\u2282',\n\tsubdot: '\\u2ABD',\n\tsubE: '\\u2AC5',\n\tsube: '\\u2286',\n\tsubedot: '\\u2AC3',\n\tsubmult: '\\u2AC1',\n\tsubnE: '\\u2ACB',\n\tsubne: '\\u228A',\n\tsubplus: '\\u2ABF',\n\tsubrarr: '\\u2979',\n\tSubset: '\\u22D0',\n\tsubset: '\\u2282',\n\tsubseteq: '\\u2286',\n\tsubseteqq: '\\u2AC5',\n\tSubsetEqual: '\\u2286',\n\tsubsetneq: '\\u228A',\n\tsubsetneqq: '\\u2ACB',\n\tsubsim: '\\u2AC7',\n\tsubsub: '\\u2AD5',\n\tsubsup: '\\u2AD3',\n\tsucc: '\\u227B',\n\tsuccapprox: '\\u2AB8',\n\tsucccurlyeq: '\\u227D',\n\tSucceeds: '\\u227B',\n\tSucceedsEqual: '\\u2AB0',\n\tSucceedsSlantEqual: '\\u227D',\n\tSucceedsTilde: '\\u227F',\n\tsucceq: '\\u2AB0',\n\tsuccnapprox: '\\u2ABA',\n\tsuccneqq: '\\u2AB6',\n\tsuccnsim: '\\u22E9',\n\tsuccsim: '\\u227F',\n\tSuchThat: '\\u220B',\n\tSum: '\\u2211',\n\tsum: '\\u2211',\n\tsung: '\\u266A',\n\tSup: '\\u22D1',\n\tsup: '\\u2283',\n\tsup1: '\\u00B9',\n\tsup2: '\\u00B2',\n\tsup3: '\\u00B3',\n\tsupdot: '\\u2ABE',\n\tsupdsub: '\\u2AD8',\n\tsupE: '\\u2AC6',\n\tsupe: '\\u2287',\n\tsupedot: '\\u2AC4',\n\tSuperset: '\\u2283',\n\tSupersetEqual: '\\u2287',\n\tsuphsol: '\\u27C9',\n\tsuphsub: '\\u2AD7',\n\tsuplarr: '\\u297B',\n\tsupmult: '\\u2AC2',\n\tsupnE: '\\u2ACC',\n\tsupne: '\\u228B',\n\tsupplus: '\\u2AC0',\n\tSupset: '\\u22D1',\n\tsupset: '\\u2283',\n\tsupseteq: '\\u2287',\n\tsupseteqq: '\\u2AC6',\n\tsupsetneq: '\\u228B',\n\tsupsetneqq: '\\u2ACC',\n\tsupsim: '\\u2AC8',\n\tsupsub: '\\u2AD4',\n\tsupsup: '\\u2AD6',\n\tswarhk: '\\u2926',\n\tswArr: '\\u21D9',\n\tswarr: '\\u2199',\n\tswarrow: '\\u2199',\n\tswnwar: '\\u292A',\n\tszlig: '\\u00DF',\n\tTab: '\\u0009',\n\ttarget: '\\u2316',\n\tTau: '\\u03A4',\n\ttau: '\\u03C4',\n\ttbrk: '\\u23B4',\n\tTcaron: '\\u0164',\n\ttcaron: '\\u0165',\n\tTcedil: '\\u0162',\n\ttcedil: '\\u0163',\n\tTcy: '\\u0422',\n\ttcy: '\\u0442',\n\ttdot: '\\u20DB',\n\ttelrec: '\\u2315',\n\tTfr: '\\uD835\\uDD17',\n\ttfr: '\\uD835\\uDD31',\n\tthere4: '\\u2234',\n\tTherefore: '\\u2234',\n\ttherefore: '\\u2234',\n\tTheta: '\\u0398',\n\ttheta: '\\u03B8',\n\tthetasym: '\\u03D1',\n\tthetav: '\\u03D1',\n\tthickapprox: '\\u2248',\n\tthicksim: '\\u223C',\n\tThickSpace: '\\u205F\\u200A',\n\tthinsp: '\\u2009',\n\tThinSpace: '\\u2009',\n\tthkap: '\\u2248',\n\tthksim: '\\u223C',\n\tTHORN: '\\u00DE',\n\tthorn: '\\u00FE',\n\tTilde: '\\u223C',\n\ttilde: '\\u02DC',\n\tTildeEqual: '\\u2243',\n\tTildeFullEqual: '\\u2245',\n\tTildeTilde: '\\u2248',\n\ttimes: '\\u00D7',\n\ttimesb: '\\u22A0',\n\ttimesbar: '\\u2A31',\n\ttimesd: '\\u2A30',\n\ttint: '\\u222D',\n\ttoea: '\\u2928',\n\ttop: '\\u22A4',\n\ttopbot: '\\u2336',\n\ttopcir: '\\u2AF1',\n\tTopf: '\\uD835\\uDD4B',\n\ttopf: '\\uD835\\uDD65',\n\ttopfork: '\\u2ADA',\n\ttosa: '\\u2929',\n\ttprime: '\\u2034',\n\tTRADE: '\\u2122',\n\ttrade: '\\u2122',\n\ttriangle: '\\u25B5',\n\ttriangledown: '\\u25BF',\n\ttriangleleft: '\\u25C3',\n\ttrianglelefteq: '\\u22B4',\n\ttriangleq: '\\u225C',\n\ttriangleright: '\\u25B9',\n\ttrianglerighteq: '\\u22B5',\n\ttridot: '\\u25EC',\n\ttrie: '\\u225C',\n\ttriminus: '\\u2A3A',\n\tTripleDot: '\\u20DB',\n\ttriplus: '\\u2A39',\n\ttrisb: '\\u29CD',\n\ttritime: '\\u2A3B',\n\ttrpezium: '\\u23E2',\n\tTscr: '\\uD835\\uDCAF',\n\ttscr: '\\uD835\\uDCC9',\n\tTScy: '\\u0426',\n\ttscy: '\\u0446',\n\tTSHcy: '\\u040B',\n\ttshcy: '\\u045B',\n\tTstrok: '\\u0166',\n\ttstrok: '\\u0167',\n\ttwixt: '\\u226C',\n\ttwoheadleftarrow: '\\u219E',\n\ttwoheadrightarrow: '\\u21A0',\n\tUacute: '\\u00DA',\n\tuacute: '\\u00FA',\n\tUarr: '\\u219F',\n\tuArr: '\\u21D1',\n\tuarr: '\\u2191',\n\tUarrocir: '\\u2949',\n\tUbrcy: '\\u040E',\n\tubrcy: '\\u045E',\n\tUbreve: '\\u016C',\n\tubreve: '\\u016D',\n\tUcirc: '\\u00DB',\n\tucirc: '\\u00FB',\n\tUcy: '\\u0423',\n\tucy: '\\u0443',\n\tudarr: '\\u21C5',\n\tUdblac: '\\u0170',\n\tudblac: '\\u0171',\n\tudhar: '\\u296E',\n\tufisht: '\\u297E',\n\tUfr: '\\uD835\\uDD18',\n\tufr: '\\uD835\\uDD32',\n\tUgrave: '\\u00D9',\n\tugrave: '\\u00F9',\n\tuHar: '\\u2963',\n\tuharl: '\\u21BF',\n\tuharr: '\\u21BE',\n\tuhblk: '\\u2580',\n\tulcorn: '\\u231C',\n\tulcorner: '\\u231C',\n\tulcrop: '\\u230F',\n\tultri: '\\u25F8',\n\tUmacr: '\\u016A',\n\tumacr: '\\u016B',\n\tuml: '\\u00A8',\n\tUnderBar: '\\u005F',\n\tUnderBrace: '\\u23DF',\n\tUnderBracket: '\\u23B5',\n\tUnderParenthesis: '\\u23DD',\n\tUnion: '\\u22C3',\n\tUnionPlus: '\\u228E',\n\tUogon: '\\u0172',\n\tuogon: '\\u0173',\n\tUopf: '\\uD835\\uDD4C',\n\tuopf: '\\uD835\\uDD66',\n\tUpArrow: '\\u2191',\n\tUparrow: '\\u21D1',\n\tuparrow: '\\u2191',\n\tUpArrowBar: '\\u2912',\n\tUpArrowDownArrow: '\\u21C5',\n\tUpDownArrow: '\\u2195',\n\tUpdownarrow: '\\u21D5',\n\tupdownarrow: '\\u2195',\n\tUpEquilibrium: '\\u296E',\n\tupharpoonleft: '\\u21BF',\n\tupharpoonright: '\\u21BE',\n\tuplus: '\\u228E',\n\tUpperLeftArrow: '\\u2196',\n\tUpperRightArrow: '\\u2197',\n\tUpsi: '\\u03D2',\n\tupsi: '\\u03C5',\n\tupsih: '\\u03D2',\n\tUpsilon: '\\u03A5',\n\tupsilon: '\\u03C5',\n\tUpTee: '\\u22A5',\n\tUpTeeArrow: '\\u21A5',\n\tupuparrows: '\\u21C8',\n\turcorn: '\\u231D',\n\turcorner: '\\u231D',\n\turcrop: '\\u230E',\n\tUring: '\\u016E',\n\turing: '\\u016F',\n\turtri: '\\u25F9',\n\tUscr: '\\uD835\\uDCB0',\n\tuscr: '\\uD835\\uDCCA',\n\tutdot: '\\u22F0',\n\tUtilde: '\\u0168',\n\tutilde: '\\u0169',\n\tutri: '\\u25B5',\n\tutrif: '\\u25B4',\n\tuuarr: '\\u21C8',\n\tUuml: '\\u00DC',\n\tuuml: '\\u00FC',\n\tuwangle: '\\u29A7',\n\tvangrt: '\\u299C',\n\tvarepsilon: '\\u03F5',\n\tvarkappa: '\\u03F0',\n\tvarnothing: '\\u2205',\n\tvarphi: '\\u03D5',\n\tvarpi: '\\u03D6',\n\tvarpropto: '\\u221D',\n\tvArr: '\\u21D5',\n\tvarr: '\\u2195',\n\tvarrho: '\\u03F1',\n\tvarsigma: '\\u03C2',\n\tvarsubsetneq: '\\u228A\\uFE00',\n\tvarsubsetneqq: '\\u2ACB\\uFE00',\n\tvarsupsetneq: '\\u228B\\uFE00',\n\tvarsupsetneqq: '\\u2ACC\\uFE00',\n\tvartheta: '\\u03D1',\n\tvartriangleleft: '\\u22B2',\n\tvartriangleright: '\\u22B3',\n\tVbar: '\\u2AEB',\n\tvBar: '\\u2AE8',\n\tvBarv: '\\u2AE9',\n\tVcy: '\\u0412',\n\tvcy: '\\u0432',\n\tVDash: '\\u22AB',\n\tVdash: '\\u22A9',\n\tvDash: '\\u22A8',\n\tvdash: '\\u22A2',\n\tVdashl: '\\u2AE6',\n\tVee: '\\u22C1',\n\tvee: '\\u2228',\n\tveebar: '\\u22BB',\n\tveeeq: '\\u225A',\n\tvellip: '\\u22EE',\n\tVerbar: '\\u2016',\n\tverbar: '\\u007C',\n\tVert: '\\u2016',\n\tvert: '\\u007C',\n\tVerticalBar: '\\u2223',\n\tVerticalLine: '\\u007C',\n\tVerticalSeparator: '\\u2758',\n\tVerticalTilde: '\\u2240',\n\tVeryThinSpace: '\\u200A',\n\tVfr: '\\uD835\\uDD19',\n\tvfr: '\\uD835\\uDD33',\n\tvltri: '\\u22B2',\n\tvnsub: '\\u2282\\u20D2',\n\tvnsup: '\\u2283\\u20D2',\n\tVopf: '\\uD835\\uDD4D',\n\tvopf: '\\uD835\\uDD67',\n\tvprop: '\\u221D',\n\tvrtri: '\\u22B3',\n\tVscr: '\\uD835\\uDCB1',\n\tvscr: '\\uD835\\uDCCB',\n\tvsubnE: '\\u2ACB\\uFE00',\n\tvsubne: '\\u228A\\uFE00',\n\tvsupnE: '\\u2ACC\\uFE00',\n\tvsupne: '\\u228B\\uFE00',\n\tVvdash: '\\u22AA',\n\tvzigzag: '\\u299A',\n\tWcirc: '\\u0174',\n\twcirc: '\\u0175',\n\twedbar: '\\u2A5F',\n\tWedge: '\\u22C0',\n\twedge: '\\u2227',\n\twedgeq: '\\u2259',\n\tweierp: '\\u2118',\n\tWfr: '\\uD835\\uDD1A',\n\twfr: '\\uD835\\uDD34',\n\tWopf: '\\uD835\\uDD4E',\n\twopf: '\\uD835\\uDD68',\n\twp: '\\u2118',\n\twr: '\\u2240',\n\twreath: '\\u2240',\n\tWscr: '\\uD835\\uDCB2',\n\twscr: '\\uD835\\uDCCC',\n\txcap: '\\u22C2',\n\txcirc: '\\u25EF',\n\txcup: '\\u22C3',\n\txdtri: '\\u25BD',\n\tXfr: '\\uD835\\uDD1B',\n\txfr: '\\uD835\\uDD35',\n\txhArr: '\\u27FA',\n\txharr: '\\u27F7',\n\tXi: '\\u039E',\n\txi: '\\u03BE',\n\txlArr: '\\u27F8',\n\txlarr: '\\u27F5',\n\txmap: '\\u27FC',\n\txnis: '\\u22FB',\n\txodot: '\\u2A00',\n\tXopf: '\\uD835\\uDD4F',\n\txopf: '\\uD835\\uDD69',\n\txoplus: '\\u2A01',\n\txotime: '\\u2A02',\n\txrArr: '\\u27F9',\n\txrarr: '\\u27F6',\n\tXscr: '\\uD835\\uDCB3',\n\txscr: '\\uD835\\uDCCD',\n\txsqcup: '\\u2A06',\n\txuplus: '\\u2A04',\n\txutri: '\\u25B3',\n\txvee: '\\u22C1',\n\txwedge: '\\u22C0',\n\tYacute: '\\u00DD',\n\tyacute: '\\u00FD',\n\tYAcy: '\\u042F',\n\tyacy: '\\u044F',\n\tYcirc: '\\u0176',\n\tycirc: '\\u0177',\n\tYcy: '\\u042B',\n\tycy: '\\u044B',\n\tyen: '\\u00A5',\n\tYfr: '\\uD835\\uDD1C',\n\tyfr: '\\uD835\\uDD36',\n\tYIcy: '\\u0407',\n\tyicy: '\\u0457',\n\tYopf: '\\uD835\\uDD50',\n\tyopf: '\\uD835\\uDD6A',\n\tYscr: '\\uD835\\uDCB4',\n\tyscr: '\\uD835\\uDCCE',\n\tYUcy: '\\u042E',\n\tyucy: '\\u044E',\n\tYuml: '\\u0178',\n\tyuml: '\\u00FF',\n\tZacute: '\\u0179',\n\tzacute: '\\u017A',\n\tZcaron: '\\u017D',\n\tzcaron: '\\u017E',\n\tZcy: '\\u0417',\n\tzcy: '\\u0437',\n\tZdot: '\\u017B',\n\tzdot: '\\u017C',\n\tzeetrf: '\\u2128',\n\tZeroWidthSpace: '\\u200B',\n\tZeta: '\\u0396',\n\tzeta: '\\u03B6',\n\tZfr: '\\u2128',\n\tzfr: '\\uD835\\uDD37',\n\tZHcy: '\\u0416',\n\tzhcy: '\\u0436',\n\tzigrarr: '\\u21DD',\n\tZopf: '\\u2124',\n\tzopf: '\\uD835\\uDD6B',\n\tZscr: '\\uD835\\uDCB5',\n\tzscr: '\\uD835\\uDCCF',\n\tzwj: '\\u200D',\n\tzwnj: '\\u200C',\n});\n\n/**\n * @deprecated use `HTML_ENTITIES` instead\n * @see HTML_ENTITIES\n */\nexports.entityMap = exports.HTML_ENTITIES;\n","'use strict';\nvar fails = require('../internals/fails');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = !fails(function () {\n  var error = Error('a');\n  if (!('stack' in error)) return true;\n  // eslint-disable-next-line es/no-object-defineproperty -- safe\n  Object.defineProperty(error, 'stack', createPropertyDescriptor(1, 7));\n  return error.stack !== 7;\n});\n","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","function _isNativeFunction(fn) {\n  return Function.toString.call(fn).indexOf(\"[native code]\") !== -1;\n}\nmodule.exports = _isNativeFunction, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar document = require('global/document');\n\nvar _objCreate = Object.create || (function() {\n  function F() {}\n  return function(o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n    F.prototype = o;\n    return new F();\n  };\n})();\n\n// Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError;\n\n// ParsingError metadata for acceptable ParsingErrors.\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n};\n\n// Try to parse input as a time stamp.\nfunction parseTimeStamp(input) {\n\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{1,2})(:\\d{1,2})?\\.(\\d{3})/);\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0,  m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n}\n\n// A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function(k, v) {\n    if (/^-?\\d+$/.test(v)) { // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function(k, v) {\n    var m;\n    if ((m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/))) {\n      v = parseFloat(v);\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n    return false;\n  }\n};\n\n// Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n    var kv = groups[i].split(keyValueDelim);\n    if (kv.length !== 2) {\n      continue;\n    }\n    var k = kv[0].trim();\n    var v = kv[1].trim();\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input;\n  // 4.1 WebVTT timestamp\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                            \"Malformed timestamp: \" + oInput);\n    }\n    // Remove time stamp from input.\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  }\n\n  // 4.4.2 WebVTT cue settings\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n\n    parseOptions(input, function (k, v) {\n      switch (k) {\n      case \"region\":\n        // Find the last region we parsed with the same region id.\n        for (var i = regionList.length - 1; i >= 0; i--) {\n          if (regionList[i].id === v) {\n            settings.set(k, regionList[i].region);\n            break;\n          }\n        }\n        break;\n      case \"vertical\":\n        settings.alt(k, v, [\"rl\", \"lr\"]);\n        break;\n      case \"line\":\n        var vals = v.split(\",\"),\n            vals0 = vals[0];\n        settings.integer(k, vals0);\n        settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n        settings.alt(k, vals0, [\"auto\"]);\n        if (vals.length === 2) {\n          settings.alt(\"lineAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"position\":\n        vals = v.split(\",\");\n        settings.percent(k, vals[0]);\n        if (vals.length === 2) {\n          settings.alt(\"positionAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"size\":\n        settings.percent(k, v);\n        break;\n      case \"align\":\n        settings.alt(k, v, [\"start\", \"center\", \"end\", \"left\", \"right\"]);\n        break;\n      }\n    }, /:/, /\\s/);\n\n    // Apply default values for any missing fields.\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    try {\n      cue.line = settings.get(\"line\", \"auto\");\n    } catch (e) {}\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    // Safari still uses the old middle value and won't accept center\n    try {\n      cue.align = settings.get(\"align\", \"center\");\n    } catch (e) {\n      cue.align = settings.get(\"align\", \"middle\");\n    }\n    try {\n      cue.position = settings.get(\"position\", \"auto\");\n    } catch (e) {\n      cue.position = settings.get(\"position\", {\n        start: 0,\n        left: 0,\n        center: 50,\n        middle: 50,\n        end: 100,\n        right: 100\n      }, cue.align);\n    }\n\n\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      center: \"center\",\n      middle: \"center\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  }\n\n  // 4.1 WebVTT cue timings.\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp();   // (1) collect cue start time\n  skipWhitespace();\n  if (input.substr(0, 3) !== \"-->\") {     // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                           \"Malformed time stamp (time stamps must be separated by '-->'): \" +\n                           oInput);\n  }\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp();     // (5) collect cue end time\n\n  // 4.1 WebVTT cue settings list.\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\n// When evaluating this file as part of a Webpack bundle for server\n// side rendering, `document` is an empty object.\nvar TEXTAREA_ELEMENT = document.createElement && document.createElement(\"textarea\");\n\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\n\n// 5.1 default text color\n// 5.2 default text background color is equivalent to text color with bg_ prefix\nvar DEFAULT_COLOR_CLASS = {\n  white: 'rgba(255,255,255,1)',\n  lime: 'rgba(0,255,0,1)',\n  cyan: 'rgba(0,255,255,1)',\n  red: 'rgba(255,0,0,1)',\n  yellow: 'rgba(255,255,0,1)',\n  magenta: 'rgba(255,0,255,1)',\n  blue: 'rgba(0,0,255,1)',\n  black: 'rgba(0,0,0,1)'\n};\n\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\n\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n};\n\n// Parse content into a document fragment.\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    }\n\n    // Consume 'n' characters from the input.\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n    // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n    return consume(m[1] ? m[1] : m[2]);\n  }\n\n  function unescape(s) {\n    TEXTAREA_ELEMENT.innerHTML = s;\n    s = TEXTAREA_ELEMENT.textContent;\n    TEXTAREA_ELEMENT.textContent = \"\";\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] ||\n           NEEDS_PARENT[element.localName] === current.localName;\n  }\n\n  // Create an element for this tag.\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n    if (!tagName) {\n      return null;\n    }\n    var element = window.document.createElement(tagName);\n    var name = TAG_ANNOTATION[type];\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length &&\n            tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        }\n        // Otherwise just ignore the end tag.\n        continue;\n      }\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n      // If we can't parse the tag, skip to the next tag.\n      if (!m) {\n        continue;\n      }\n      // Try to construct an element, and ignore the tag if we couldn't.\n      node = createElement(m[1], m[3]);\n      if (!node) {\n        continue;\n      }\n      // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n      if (!shouldAdd(current, node)) {\n        continue;\n      }\n      // Set the class list (as a list of classes, separated by space).\n      if (m[2]) {\n        var classes = m[2].split('.');\n\n        classes.forEach(function(cl) {\n          var bgColor = /^bg_/.test(cl);\n          // slice out `bg_` if it's a background color\n          var colorName = bgColor ? cl.slice(3) : cl;\n\n          if (DEFAULT_COLOR_CLASS.hasOwnProperty(colorName)) {\n            var propName = bgColor ? 'background-color' : 'color';\n            var propValue = DEFAULT_COLOR_CLASS[colorName];\n\n            node.style[propName] = propValue;\n          }\n        });\n\n        node.className = classes.join(' ');\n      }\n      // Append the node to the current node, and enter the scope of the new\n      // node.\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    }\n\n    // Text nodes are leaf nodes.\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n}\n\n// This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6],\n [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d],\n [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6],\n [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5],\n [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815],\n [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858],\n [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f],\n [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c],\n [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1],\n [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc],\n [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808],\n [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855],\n [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f],\n [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13],\n [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58],\n [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72],\n [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f],\n [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32],\n [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42],\n [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f],\n [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59],\n [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62],\n [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77],\n [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b],\n [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n      return text;\n    }\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n  while ((text = nextTextNode(nodeStack))) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" &&\n      (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {\n    return cue.line;\n  }\n  if (!cue.track || !cue.track.textTrackList ||\n      !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n  return ++count * -1;\n}\n\nfunction StyleBox() {\n}\n\n// Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\nStyleBox.prototype.applyStyles = function(styles, div) {\n  div = div || this.div;\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function(val, unit) {\n  return val === 0 ? 0 : val + unit;\n};\n\n// Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\nfunction CueStyleBox(window, cue, styleOptions) {\n  StyleBox.call(this);\n  this.cue = cue;\n\n  // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: \"rgba(255, 255, 255, 1)\",\n    backgroundColor:  \"rgba(0, 0, 0, 0.8)\",\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\",\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\"\n  };\n\n  this.applyStyles(styles, this.cueDiv);\n\n  // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except middle instead of center on Safari.\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    direction: determineBidi(this.cueDiv),\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\",\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n\n  this.applyStyles(styles);\n  this.div.appendChild(this.cueDiv);\n\n  // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n  var textPos = 0;\n  switch (cue.positionAlign) {\n  case \"start\":\n  case \"line-left\":\n    textPos = cue.position;\n    break;\n  case \"center\":\n    textPos = cue.position - (cue.size / 2);\n    break;\n  case \"end\":\n  case \"line-right\":\n    textPos = cue.position - cue.size;\n    break;\n  }\n\n  // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left:  this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    });\n  // Vertical box orientation; textPos is the distance from the top edge of the\n  // area to the top edge of the box and cue.size is the height extending\n  // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function(box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox;\n\n// Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\nfunction BoxPosition(obj) {\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&\n                rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect();\n    // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n    lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)\n               : 0;\n\n  }\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || (top + (obj.height || height));\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n}\n\n// Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\nBoxPosition.prototype.move = function(axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n  switch (axis) {\n  case \"+x\":\n    this.left += toMove;\n    this.right += toMove;\n    break;\n  case \"-x\":\n    this.left -= toMove;\n    this.right -= toMove;\n    break;\n  case \"+y\":\n    this.top += toMove;\n    this.bottom += toMove;\n    break;\n  case \"-y\":\n    this.top -= toMove;\n    this.bottom -= toMove;\n    break;\n  }\n};\n\n// Check if this box overlaps another box, b2.\nBoxPosition.prototype.overlaps = function(b2) {\n  return this.left < b2.right &&\n         this.right > b2.left &&\n         this.top < b2.bottom &&\n         this.bottom > b2.top;\n};\n\n// Check if this box overlaps any other boxes in boxes.\nBoxPosition.prototype.overlapsAny = function(boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n  return false;\n};\n\n// Check if this box is within another box.\nBoxPosition.prototype.within = function(container) {\n  return this.top >= container.top &&\n         this.bottom <= container.bottom &&\n         this.left >= container.left &&\n         this.right <= container.right;\n};\n\n// Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\nBoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {\n  switch (axis) {\n  case \"+x\":\n    return this.left < container.left;\n  case \"-x\":\n    return this.right > container.right;\n  case \"+y\":\n    return this.top < container.top;\n  case \"-y\":\n    return this.bottom > container.bottom;\n  }\n};\n\n// Find the percentage of the area that this box is overlapping with another\n// box.\nBoxPosition.prototype.intersectPercentage = function(b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n};\n\n// Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\nBoxPosition.prototype.toCSSCompatValues = function(reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n};\n\n// Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\nBoxPosition.getSimpleBoxPosition = function(obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n\n  obj = obj.div ? obj.div.getBoundingClientRect() :\n                obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || (top + (obj.height || height)),\n    width: obj.width || width\n  };\n  return ret;\n};\n\n// Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) ||\n             (b.within(containerBox) && b.overlapsAny(boxPositions))) {\n        b.move(axis[i]);\n      }\n      // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n      if (b.within(containerBox)) {\n        return b;\n      }\n      var p = b.intersectPercentage(containerBox);\n      // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      }\n      // Reset the box position to the specified position.\n      b = new BoxPosition(specifiedPosition);\n    }\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = [];\n\n  // If we have a line number to align the cue to.\n  if (cue.snapToLines) {\n    var size;\n    switch (cue.vertical) {\n    case \"\":\n      axis = [ \"+y\", \"-y\" ];\n      size = \"height\";\n      break;\n    case \"rl\":\n      axis = [ \"+x\", \"-x\" ];\n      size = \"width\";\n      break;\n    case \"lr\":\n      axis = [ \"-x\", \"+x\" ];\n      size = \"width\";\n      break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0];\n\n    // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    }\n\n    // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    }\n\n    // Move the box to the specified position. This may not be its best\n    // position.\n    boxPosition.move(initialAxis, position);\n\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;\n\n    switch (cue.lineAlign) {\n    case \"center\":\n      linePos -= (calculatedPercentage / 2);\n      break;\n    case \"end\":\n      linePos -= calculatedPercentage;\n      break;\n    }\n\n    // Apply initial line position to the cue box.\n    switch (cue.vertical) {\n    case \"\":\n      styleBox.applyStyles({\n        top: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"rl\":\n      styleBox.applyStyles({\n        left: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"lr\":\n      styleBox.applyStyles({\n        right: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    }\n\n    axis = [ \"+y\", \"-x\", \"+x\", \"-y\" ];\n\n    // Get the box position again after we've applied the specified positioning\n    // to it.\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {\n  // Nothing\n}\n\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\nWebVTT.StringDecoder = function() {\n  return {\n    decode: function(data) {\n      if (!data) {\n        return \"\";\n      }\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function(window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\";\n\n// Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\nWebVTT.processCues = function(window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  }\n\n  // Remove all previous children.\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay);\n\n  // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // We don't need to recompute the cues' display states. Just reuse them.\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function() {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i];\n\n      // Compute the intial position and styles of the cue div.\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div);\n\n      // Move the cue div to it's correct line position.\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n      // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n      cue.displayState = styleBox.div;\n\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function(window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function (data) {\n    var self = this;\n\n    // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {stream: true});\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n      var line = buffer.substr(0, pos);\n      // Advance the buffer early in case we fail below.\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n      self.buffer = buffer.substr(pos);\n      return line;\n    }\n\n    // 3.4 WebVTT region and WebVTT region settings syntax\n    function parseRegion(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function (k, v) {\n        switch (k) {\n        case \"id\":\n          settings.set(k, v);\n          break;\n        case \"width\":\n          settings.percent(k, v);\n          break;\n        case \"lines\":\n          settings.integer(k, v);\n          break;\n        case \"regionanchor\":\n        case \"viewportanchor\":\n          var xy = v.split(',');\n          if (xy.length !== 2) {\n            break;\n          }\n          // We have to make sure both x and y parse, so use a temporary\n          // settings object here.\n          var anchor = new Settings();\n          anchor.percent(\"x\", xy[0]);\n          anchor.percent(\"y\", xy[1]);\n          if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n            break;\n          }\n          settings.set(k + \"X\", anchor.get(\"x\"));\n          settings.set(k + \"Y\", anchor.get(\"y\"));\n          break;\n        case \"scroll\":\n          settings.alt(k, v, [\"up\"]);\n          break;\n        }\n      }, /=/, /\\s/);\n\n      // Create the region, using default values for any values that were not\n      // specified.\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\");\n        // Register the region.\n        self.onregion && self.onregion(region);\n        // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    }\n\n    // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function(k, v) {\n        switch(k) {\n        case \"MPEGT\":\n          settings.integer(k + 'S', v);\n          break;\n        case \"LOCA\":\n          settings.set(k + 'L', parseTimeStamp(v));\n          break;\n        }\n      }, /[^\\d]:/, /,/);\n\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    }\n\n    // 3.2 WebVTT metadata header syntax\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function(k, v) {\n          switch(k) {\n          case \"X-TIMESTAMP-MAP\":\n            parseTimestampMap(v);\n            break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n          case \"Region\":\n            // 3.3 WebVTT region metadata header syntax\n            parseRegion(v);\n            break;\n          }\n        }, /:/);\n      }\n\n    }\n\n    // 5.1 WebVTT file parsing.\n    try {\n      var line;\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n        case \"HEADER\":\n          // 13-18 - Allow a header (metadata) under the WEBVTT line.\n          if (/:/.test(line)) {\n            parseHeader(line);\n          } else if (!line) {\n            // An empty line terminates the header and starts the body (cues).\n            self.state = \"ID\";\n          }\n          continue;\n        case \"NOTE\":\n          // Ignore NOTE blocks.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        case \"ID\":\n          // Check for the start of NOTE blocks.\n          if (/^NOTE($|[ \\t])/.test(line)) {\n            self.state = \"NOTE\";\n            break;\n          }\n          // 19-29 - Allow any number of line terminators, then initialize new cue values.\n          if (!line) {\n            continue;\n          }\n          self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n          // Safari still uses the old middle value and won't accept center\n          try {\n            self.cue.align = \"center\";\n          } catch (e) {\n            self.cue.align = \"middle\";\n          }\n          self.state = \"CUE\";\n          // 30-39 - Check if self line contains an optional identifier or timing data.\n          if (line.indexOf(\"-->\") === -1) {\n            self.cue.id = line;\n            continue;\n          }\n          // Process line as start of a cue.\n          /*falls through*/\n        case \"CUE\":\n          // 40 - Collect cue timings and settings.\n          try {\n            parseCue(line, self.cue, self.regionList);\n          } catch (e) {\n            self.reportOrThrowError(e);\n            // In case of an error ignore rest of the cue.\n            self.cue = null;\n            self.state = \"BADCUE\";\n            continue;\n          }\n          self.state = \"CUETEXT\";\n          continue;\n        case \"CUETEXT\":\n          var hasSubstring = line.indexOf(\"-->\") !== -1;\n          // 34 - If we have an empty line then report the cue.\n          // 35 - If we have the special substring '-->' then report the cue,\n          // but do not collect the line as we need to process the current\n          // one as a new cue.\n          if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n            // We are done parsing self cue.\n            self.oncue && self.oncue(self.cue);\n            self.cue = null;\n            self.state = \"ID\";\n            continue;\n          }\n          if (self.cue.text) {\n            self.cue.text += \"\\n\";\n          }\n          self.cue.text += line.replace(/\\u2028/g, '\\n').replace(/u2029/g, '\\n');\n          continue;\n        case \"BADCUE\": // BADCUE\n          // 54-62 - Collect and discard the remaining cue.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n\n      // If we are currently parsing a cue, report what we have.\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n      self.cue = null;\n      // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n    return this;\n  },\n  flush: function () {\n    var self = this;\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode();\n      // Synthesize the end of the current cue or region.\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      }\n      // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch(e) {\n      self.reportOrThrowError(e);\n    }\n    self.onflush && self.onflush();\n    return this;\n  }\n};\n\nmodule.exports = WebVTT;\n","// see https://tools.ietf.org/html/rfc1808\n\n(function (root) {\n  var URL_REGEX =\n    /^(?=((?:[a-zA-Z0-9+\\-.]+:)?))\\1(?=((?:\\/\\/[^\\/?#]*)?))\\2(?=((?:(?:[^?#\\/]*\\/)*[^;?#\\/]*)?))\\3((?:;[^?#]*)?)(\\?[^#]*)?(#[^]*)?$/;\n  var FIRST_SEGMENT_REGEX = /^(?=([^\\/?#]*))\\1([^]*)$/;\n  var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n  var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/)[^\\/]*(?=\\/)/g;\n\n  var URLToolkit = {\n    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n    // E.g\n    // With opts.alwaysNormalize = false (default, spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n    // With opts.alwaysNormalize = true (not spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n    buildAbsoluteURL: function (baseURL, relativeURL, opts) {\n      opts = opts || {};\n      // remove any remaining space and CRLF\n      baseURL = baseURL.trim();\n      relativeURL = relativeURL.trim();\n      if (!relativeURL) {\n        // 2a) If the embedded URL is entirely empty, it inherits the\n        // entire base URL (i.e., is set equal to the base URL)\n        // and we are done.\n        if (!opts.alwaysNormalize) {\n          return baseURL;\n        }\n        var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n        if (!basePartsForNormalise) {\n          throw new Error('Error trying to parse base URL.');\n        }\n        basePartsForNormalise.path = URLToolkit.normalizePath(\n          basePartsForNormalise.path\n        );\n        return URLToolkit.buildURLFromParts(basePartsForNormalise);\n      }\n      var relativeParts = URLToolkit.parseURL(relativeURL);\n      if (!relativeParts) {\n        throw new Error('Error trying to parse relative URL.');\n      }\n      if (relativeParts.scheme) {\n        // 2b) If the embedded URL starts with a scheme name, it is\n        // interpreted as an absolute URL and we are done.\n        if (!opts.alwaysNormalize) {\n          return relativeURL;\n        }\n        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n        return URLToolkit.buildURLFromParts(relativeParts);\n      }\n      var baseParts = URLToolkit.parseURL(baseURL);\n      if (!baseParts) {\n        throw new Error('Error trying to parse base URL.');\n      }\n      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n        baseParts.netLoc = pathParts[1];\n        baseParts.path = pathParts[2];\n      }\n      if (baseParts.netLoc && !baseParts.path) {\n        baseParts.path = '/';\n      }\n      var builtParts = {\n        // 2c) Otherwise, the embedded URL inherits the scheme of\n        // the base URL.\n        scheme: baseParts.scheme,\n        netLoc: relativeParts.netLoc,\n        path: null,\n        params: relativeParts.params,\n        query: relativeParts.query,\n        fragment: relativeParts.fragment,\n      };\n      if (!relativeParts.netLoc) {\n        // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>\n        // (if any) of the base URL.\n        builtParts.netLoc = baseParts.netLoc;\n        // 4) If the embedded URL path is preceded by a slash \"/\", the\n        // path is not relative and we skip to Step 7.\n        if (relativeParts.path[0] !== '/') {\n          if (!relativeParts.path) {\n            // 5) If the embedded URL path is empty (and not preceded by a\n            // slash), then the embedded URL inherits the base URL path\n            builtParts.path = baseParts.path;\n            // 5a) if the embedded URL's <params> is non-empty, we skip to\n            // step 7; otherwise, it inherits the <params> of the base\n            // URL (if any) and\n            if (!relativeParts.params) {\n              builtParts.params = baseParts.params;\n              // 5b) if the embedded URL's <query> is non-empty, we skip to\n              // step 7; otherwise, it inherits the <query> of the base\n              // URL (if any) and we skip to step 7.\n              if (!relativeParts.query) {\n                builtParts.query = baseParts.query;\n              }\n            }\n          } else {\n            // 6) The last segment of the base URL's path (anything\n            // following the rightmost slash \"/\", or the entire path if no\n            // slash is present) is removed and the embedded URL's path is\n            // appended in its place.\n            var baseURLPath = baseParts.path;\n            var newPath =\n              baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) +\n              relativeParts.path;\n            builtParts.path = URLToolkit.normalizePath(newPath);\n          }\n        }\n      }\n      if (builtParts.path === null) {\n        builtParts.path = opts.alwaysNormalize\n          ? URLToolkit.normalizePath(relativeParts.path)\n          : relativeParts.path;\n      }\n      return URLToolkit.buildURLFromParts(builtParts);\n    },\n    parseURL: function (url) {\n      var parts = URL_REGEX.exec(url);\n      if (!parts) {\n        return null;\n      }\n      return {\n        scheme: parts[1] || '',\n        netLoc: parts[2] || '',\n        path: parts[3] || '',\n        params: parts[4] || '',\n        query: parts[5] || '',\n        fragment: parts[6] || '',\n      };\n    },\n    normalizePath: function (path) {\n      // The following operations are\n      // then applied, in order, to the new path:\n      // 6a) All occurrences of \"./\", where \".\" is a complete path\n      // segment, are removed.\n      // 6b) If the path ends with \".\" as a complete path segment,\n      // that \".\" is removed.\n      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');\n      // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n      // complete path segment not equal to \"..\", are removed.\n      // Removal of these path segments is performed iteratively,\n      // removing the leftmost matching pattern on each iteration,\n      // until no matching pattern remains.\n      // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n      // complete path segment not equal to \"..\", that\n      // \"<segment>/..\" is removed.\n      while (\n        path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length\n      ) {}\n      return path.split('').reverse().join('');\n    },\n    buildURLFromParts: function (parts) {\n      return (\n        parts.scheme +\n        parts.netLoc +\n        parts.path +\n        parts.params +\n        parts.query +\n        parts.fragment\n      );\n    },\n  };\n\n  if (typeof exports === 'object' && typeof module === 'object')\n    module.exports = URLToolkit;\n  else if (typeof define === 'function' && define.amd)\n    define([], function () {\n      return URLToolkit;\n    });\n  else if (typeof exports === 'object') exports['URLToolkit'] = URLToolkit;\n  else root['URLToolkit'] = URLToolkit;\n})(this);\n","/**\n * @file stream.js\n */\n\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\nvar Stream = /*#__PURE__*/function () {\n  function Stream() {\n    this.listeners = {};\n  }\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  var _proto = Stream.prototype;\n\n  _proto.on = function on(type, listener) {\n    if (!this.listeners[type]) {\n      this.listeners[type] = [];\n    }\n\n    this.listeners[type].push(listener);\n  }\n  /**\n   * Remove a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener  a function previously registered for this\n   * type of event through `on`\n   * @return {boolean} if we could turn it off or not\n   */\n  ;\n\n  _proto.off = function off(type, listener) {\n    if (!this.listeners[type]) {\n      return false;\n    }\n\n    var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n    // In Video.js we slice listener functions\n    // on trigger so that it does not mess up the order\n    // while we loop through.\n    //\n    // Here we slice on off so that the loop in trigger\n    // can continue using it's old reference to loop without\n    // messing up the order.\n\n    this.listeners[type] = this.listeners[type].slice(0);\n    this.listeners[type].splice(index, 1);\n    return index > -1;\n  }\n  /**\n   * Trigger an event of the specified type on this stream. Any additional\n   * arguments to this function are passed as parameters to event listeners.\n   *\n   * @param {string} type the event name\n   */\n  ;\n\n  _proto.trigger = function trigger(type) {\n    var callbacks = this.listeners[type];\n\n    if (!callbacks) {\n      return;\n    } // Slicing the arguments on every invocation of this method\n    // can add a significant amount of overhead. Avoid the\n    // intermediate object creation for the common case of a\n    // single callback argument\n\n\n    if (arguments.length === 2) {\n      var length = callbacks.length;\n\n      for (var i = 0; i < length; ++i) {\n        callbacks[i].call(this, arguments[1]);\n      }\n    } else {\n      var args = Array.prototype.slice.call(arguments, 1);\n      var _length = callbacks.length;\n\n      for (var _i = 0; _i < _length; ++_i) {\n        callbacks[_i].apply(this, args);\n      }\n    }\n  }\n  /**\n   * Destroys the stream and cleans up.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.listeners = {};\n  }\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   *\n   * @param {Stream} destination the stream that will receive all `data` events\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n  ;\n\n  _proto.pipe = function pipe(destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n  };\n\n  return Stream;\n}();\n\nexport { Stream as default };","/*! @name m3u8-parser @version 4.8.0 @license Apache-2.0 */\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport Stream from '@videojs/vhs-utils/es/stream.js';\nimport _extends from '@babel/runtime/helpers/extends';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array.js';\n\n/**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\n\nvar LineStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(LineStream, _Stream);\n\n  function LineStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.buffer = '';\n    return _this;\n  }\n  /**\n   * Add new data to be parsed.\n   *\n   * @param {string} data the text to process\n   */\n\n\n  var _proto = LineStream.prototype;\n\n  _proto.push = function push(data) {\n    var nextNewline;\n    this.buffer += data;\n    nextNewline = this.buffer.indexOf('\\n');\n\n    for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n      this.trigger('data', this.buffer.substring(0, nextNewline));\n      this.buffer = this.buffer.substring(nextNewline + 1);\n    }\n  };\n\n  return LineStream;\n}(Stream);\n\nvar TAB = String.fromCharCode(0x09);\n\nvar parseByterange = function parseByterange(byterangeString) {\n  // optionally match and capture 0+ digits before `@`\n  // optionally match and capture 0+ digits after `@`\n  var match = /([0-9.]*)?@?([0-9.]*)?/.exec(byterangeString || '');\n  var result = {};\n\n  if (match[1]) {\n    result.length = parseInt(match[1], 10);\n  }\n\n  if (match[2]) {\n    result.offset = parseInt(match[2], 10);\n  }\n\n  return result;\n};\n/**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue   -> key '=' value\n * key        -> [^=]*\n * value      -> '\"' [^\"]* '\"' | [^,]*\n */\n\n\nvar attributeSeparator = function attributeSeparator() {\n  var key = '[^=]*';\n  var value = '\"[^\"]*\"|[^,]*';\n  var keyvalue = '(?:' + key + ')=(?:' + value + ')';\n  return new RegExp('(?:^|,)(' + keyvalue + ')');\n};\n/**\n * Parse attributes from a line given the separator\n *\n * @param {string} attributes the attribute line to parse\n */\n\n\nvar parseAttributes = function parseAttributes(attributes) {\n  // split the string using attributes as the separator\n  var attrs = attributes.split(attributeSeparator());\n  var result = {};\n  var i = attrs.length;\n  var attr;\n\n  while (i--) {\n    // filter out unmatched portions of the string\n    if (attrs[i] === '') {\n      continue;\n    } // split the key and value\n\n\n    attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value\n\n    attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n    result[attr[0]] = attr[1];\n  }\n\n  return result;\n};\n/**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\n\nvar ParseStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(ParseStream, _Stream);\n\n  function ParseStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.customParsers = [];\n    _this.tagMappers = [];\n    return _this;\n  }\n  /**\n   * Parses an additional line of input.\n   *\n   * @param {string} line a single line of an M3U8 file to parse\n   */\n\n\n  var _proto = ParseStream.prototype;\n\n  _proto.push = function push(line) {\n    var _this2 = this;\n\n    var match;\n    var event; // strip whitespace\n\n    line = line.trim();\n\n    if (line.length === 0) {\n      // ignore empty lines\n      return;\n    } // URIs\n\n\n    if (line[0] !== '#') {\n      this.trigger('data', {\n        type: 'uri',\n        uri: line\n      });\n      return;\n    } // map tags\n\n\n    var newLines = this.tagMappers.reduce(function (acc, mapper) {\n      var mappedLine = mapper(line); // skip if unchanged\n\n      if (mappedLine === line) {\n        return acc;\n      }\n\n      return acc.concat([mappedLine]);\n    }, [line]);\n    newLines.forEach(function (newLine) {\n      for (var i = 0; i < _this2.customParsers.length; i++) {\n        if (_this2.customParsers[i].call(_this2, newLine)) {\n          return;\n        }\n      } // Comments\n\n\n      if (newLine.indexOf('#EXT') !== 0) {\n        _this2.trigger('data', {\n          type: 'comment',\n          text: newLine.slice(1)\n        });\n\n        return;\n      } // strip off any carriage returns here so the regex matching\n      // doesn't have to account for them.\n\n\n      newLine = newLine.replace('\\r', ''); // Tags\n\n      match = /^#EXTM3U/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'm3u'\n        });\n\n        return;\n      }\n\n      match = /^#EXTINF:?([0-9\\.]*)?,?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'inf'\n        };\n\n        if (match[1]) {\n          event.duration = parseFloat(match[1]);\n        }\n\n        if (match[2]) {\n          event.title = match[2];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'targetduration'\n        };\n\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'version'\n        };\n\n        if (match[1]) {\n          event.version = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'discontinuity-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'playlist-type'\n        };\n\n        if (match[1]) {\n          event.playlistType = match[1];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-BYTERANGE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = _extends(parseByterange(match[1]), {\n          type: 'tag',\n          tagType: 'byterange'\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'allow-cache'\n        };\n\n        if (match[1]) {\n          event.allowed = !/NO/.test(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MAP:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'map'\n        };\n\n        if (match[1]) {\n          var attributes = parseAttributes(match[1]);\n\n          if (attributes.URI) {\n            event.uri = attributes.URI;\n          }\n\n          if (attributes.BYTERANGE) {\n            event.byterange = parseByterange(attributes.BYTERANGE);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'stream-inf'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n\n          if (event.attributes.RESOLUTION) {\n            var split = event.attributes.RESOLUTION.split('x');\n            var resolution = {};\n\n            if (split[0]) {\n              resolution.width = parseInt(split[0], 10);\n            }\n\n            if (split[1]) {\n              resolution.height = parseInt(split[1], 10);\n            }\n\n            event.attributes.RESOLUTION = resolution;\n          }\n\n          if (event.attributes.BANDWIDTH) {\n            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n          }\n\n          if (event.attributes['FRAME-RATE']) {\n            event.attributes['FRAME-RATE'] = parseFloat(event.attributes['FRAME-RATE']);\n          }\n\n          if (event.attributes['PROGRAM-ID']) {\n            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ENDLIST/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'endlist'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'discontinuity'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'program-date-time'\n        };\n\n        if (match[1]) {\n          event.dateTimeString = match[1];\n          event.dateTimeObject = new Date(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-KEY:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'key'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array\n\n          if (event.attributes.IV) {\n            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n              event.attributes.IV = event.attributes.IV.substring(2);\n            }\n\n            event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n            event.attributes.IV = new Uint32Array(event.attributes.IV);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-START:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'start'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n          event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);\n          event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out-cont'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-in'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SKIP:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'skip'\n        };\n        event.attributes = parseAttributes(match[1]);\n\n        if (event.attributes.hasOwnProperty('SKIPPED-SEGMENTS')) {\n          event.attributes['SKIPPED-SEGMENTS'] = parseInt(event.attributes['SKIPPED-SEGMENTS'], 10);\n        }\n\n        if (event.attributes.hasOwnProperty('RECENTLY-REMOVED-DATERANGES')) {\n          event.attributes['RECENTLY-REMOVED-DATERANGES'] = event.attributes['RECENTLY-REMOVED-DATERANGES'].split(TAB);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['DURATION'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['INDEPENDENT', 'GAP'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        if (event.attributes.hasOwnProperty('BYTERANGE')) {\n          event.attributes.byterange = parseByterange(event.attributes.BYTERANGE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SERVER-CONTROL:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'server-control'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['CAN-SKIP-UNTIL', 'PART-HOLD-BACK', 'HOLD-BACK'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['CAN-SKIP-DATERANGES', 'CAN-BLOCK-RELOAD'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART-INF:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part-inf'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['PART-TARGET'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PRELOAD-HINT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'preload-hint'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['BYTERANGE-START', 'BYTERANGE-LENGTH'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n            var subkey = key === 'BYTERANGE-LENGTH' ? 'length' : 'offset';\n            event.attributes.byterange = event.attributes.byterange || {};\n            event.attributes.byterange[subkey] = event.attributes[key]; // only keep the parsed byterange object.\n\n            delete event.attributes[key];\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-RENDITION-REPORT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'rendition-report'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['LAST-MSN', 'LAST-PART'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      } // unknown tag type\n\n\n      _this2.trigger('data', {\n        type: 'tag',\n        data: newLine.slice(4)\n      });\n    });\n  }\n  /**\n   * Add a parser for custom headers\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.customType   the custom type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(_ref) {\n    var _this3 = this;\n\n    var expression = _ref.expression,\n        customType = _ref.customType,\n        dataParser = _ref.dataParser,\n        segment = _ref.segment;\n\n    if (typeof dataParser !== 'function') {\n      dataParser = function dataParser(line) {\n        return line;\n      };\n    }\n\n    this.customParsers.push(function (line) {\n      var match = expression.exec(line);\n\n      if (match) {\n        _this3.trigger('data', {\n          type: 'custom',\n          data: dataParser(line),\n          customType: customType,\n          segment: segment\n        });\n\n        return true;\n      }\n    });\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(_ref2) {\n    var expression = _ref2.expression,\n        map = _ref2.map;\n\n    var mapFn = function mapFn(line) {\n      if (expression.test(line)) {\n        return map(line);\n      }\n\n      return line;\n    };\n\n    this.tagMappers.push(mapFn);\n  };\n\n  return ParseStream;\n}(Stream);\n\nvar camelCase = function camelCase(str) {\n  return str.toLowerCase().replace(/-(\\w)/g, function (a) {\n    return a[1].toUpperCase();\n  });\n};\n\nvar camelCaseKeys = function camelCaseKeys(attributes) {\n  var result = {};\n  Object.keys(attributes).forEach(function (key) {\n    result[camelCase(key)] = attributes[key];\n  });\n  return result;\n}; // set SERVER-CONTROL hold back based upon targetDuration and partTargetDuration\n// we need this helper because defaults are based upon targetDuration and\n// partTargetDuration being set, but they may not be if SERVER-CONTROL appears before\n// target durations are set.\n\n\nvar setHoldBack = function setHoldBack(manifest) {\n  var serverControl = manifest.serverControl,\n      targetDuration = manifest.targetDuration,\n      partTargetDuration = manifest.partTargetDuration;\n\n  if (!serverControl) {\n    return;\n  }\n\n  var tag = '#EXT-X-SERVER-CONTROL';\n  var hb = 'holdBack';\n  var phb = 'partHoldBack';\n  var minTargetDuration = targetDuration && targetDuration * 3;\n  var minPartDuration = partTargetDuration && partTargetDuration * 2;\n\n  if (targetDuration && !serverControl.hasOwnProperty(hb)) {\n    serverControl[hb] = minTargetDuration;\n    this.trigger('info', {\n      message: tag + \" defaulting HOLD-BACK to targetDuration * 3 (\" + minTargetDuration + \").\"\n    });\n  }\n\n  if (minTargetDuration && serverControl[hb] < minTargetDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping HOLD-BACK (\" + serverControl[hb] + \") to targetDuration * 3 (\" + minTargetDuration + \")\"\n    });\n    serverControl[hb] = minTargetDuration;\n  } // default no part hold back to part target duration * 3\n\n\n  if (partTargetDuration && !serverControl.hasOwnProperty(phb)) {\n    serverControl[phb] = partTargetDuration * 3;\n    this.trigger('info', {\n      message: tag + \" defaulting PART-HOLD-BACK to partTargetDuration * 3 (\" + serverControl[phb] + \").\"\n    });\n  } // if part hold back is too small default it to part target duration * 2\n\n\n  if (partTargetDuration && serverControl[phb] < minPartDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping PART-HOLD-BACK (\" + serverControl[phb] + \") to partTargetDuration * 2 (\" + minPartDuration + \").\"\n    });\n    serverControl[phb] = minPartDuration;\n  }\n};\n/**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\n\n\nvar Parser = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(Parser, _Stream);\n\n  function Parser() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.lineStream = new LineStream();\n    _this.parseStream = new ParseStream();\n\n    _this.lineStream.pipe(_this.parseStream);\n    /* eslint-disable consistent-this */\n\n\n    var self = _assertThisInitialized(_this);\n    /* eslint-enable consistent-this */\n\n\n    var uris = [];\n    var currentUri = {}; // if specified, the active EXT-X-MAP definition\n\n    var currentMap; // if specified, the active decryption key\n\n    var _key;\n\n    var hasParts = false;\n\n    var noop = function noop() {};\n\n    var defaultMediaGroups = {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    }; // This is the Widevine UUID from DASH IF IOP. The same exact string is\n    // used in MPDs with Widevine encrypted streams.\n\n    var widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities\n\n    var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data\n\n    _this.manifest = {\n      allowCache: true,\n      discontinuityStarts: [],\n      segments: []\n    }; // keep track of the last seen segment's byte range end, as segments are not required\n    // to provide the offset, in which case it defaults to the next byte after the\n    // previous segment\n\n    var lastByterangeEnd = 0; // keep track of the last seen part's byte range end.\n\n    var lastPartByterangeEnd = 0;\n\n    _this.on('end', function () {\n      // only add preloadSegment if we don't yet have a uri for it.\n      // and we actually have parts/preloadHints\n      if (currentUri.uri || !currentUri.parts && !currentUri.preloadHints) {\n        return;\n      }\n\n      if (!currentUri.map && currentMap) {\n        currentUri.map = currentMap;\n      }\n\n      if (!currentUri.key && _key) {\n        currentUri.key = _key;\n      }\n\n      if (!currentUri.timeline && typeof currentTimeline === 'number') {\n        currentUri.timeline = currentTimeline;\n      }\n\n      _this.manifest.preloadSegment = currentUri;\n    }); // update the manifest with the m3u8 entry from the parse stream\n\n\n    _this.parseStream.on('data', function (entry) {\n      var mediaGroup;\n      var rendition;\n      ({\n        tag: function tag() {\n          // switch based on the tag type\n          (({\n            version: function version() {\n              if (entry.version) {\n                this.manifest.version = entry.version;\n              }\n            },\n            'allow-cache': function allowCache() {\n              this.manifest.allowCache = entry.allowed;\n\n              if (!('allowed' in entry)) {\n                this.trigger('info', {\n                  message: 'defaulting allowCache to YES'\n                });\n                this.manifest.allowCache = true;\n              }\n            },\n            byterange: function byterange() {\n              var byterange = {};\n\n              if ('length' in entry) {\n                currentUri.byterange = byterange;\n                byterange.length = entry.length;\n\n                if (!('offset' in entry)) {\n                  /*\n                   * From the latest spec (as of this writing):\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2\n                   *\n                   * Same text since EXT-X-BYTERANGE's introduction in draft 7:\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)\n                   *\n                   * \"If o [offset] is not present, the sub-range begins at the next byte\n                   * following the sub-range of the previous media segment.\"\n                   */\n                  entry.offset = lastByterangeEnd;\n                }\n              }\n\n              if ('offset' in entry) {\n                currentUri.byterange = byterange;\n                byterange.offset = entry.offset;\n              }\n\n              lastByterangeEnd = byterange.offset + byterange.length;\n            },\n            endlist: function endlist() {\n              this.manifest.endList = true;\n            },\n            inf: function inf() {\n              if (!('mediaSequence' in this.manifest)) {\n                this.manifest.mediaSequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting media sequence to zero'\n                });\n              }\n\n              if (!('discontinuitySequence' in this.manifest)) {\n                this.manifest.discontinuitySequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting discontinuity sequence to zero'\n                });\n              }\n\n              if (entry.duration > 0) {\n                currentUri.duration = entry.duration;\n              }\n\n              if (entry.duration === 0) {\n                currentUri.duration = 0.01;\n                this.trigger('info', {\n                  message: 'updating zero segment duration to a small value'\n                });\n              }\n\n              this.manifest.segments = uris;\n            },\n            key: function key() {\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without attribute list'\n                });\n                return;\n              } // clear the active encryption key\n\n\n              if (entry.attributes.METHOD === 'NONE') {\n                _key = null;\n                return;\n              }\n\n              if (!entry.attributes.URI) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without URI'\n                });\n                return;\n              }\n\n              if (entry.attributes.KEYFORMAT === 'com.apple.streamingkeydelivery') {\n                this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n                this.manifest.contentProtection['com.apple.fps.1_0'] = {\n                  attributes: entry.attributes\n                };\n                return;\n              }\n\n              if (entry.attributes.KEYFORMAT === 'com.microsoft.playready') {\n                this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n                this.manifest.contentProtection['com.microsoft.playready'] = {\n                  uri: entry.attributes.URI\n                };\n                return;\n              } // check if the content is encrypted for Widevine\n              // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf\n\n\n              if (entry.attributes.KEYFORMAT === widevineUuid) {\n                var VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];\n\n                if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {\n                  this.trigger('warn', {\n                    message: 'invalid key method provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {\n                  this.trigger('warn', {\n                    message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'\n                  });\n                }\n\n                if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {\n                  this.trigger('warn', {\n                    message: 'invalid key URI provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {\n                  this.trigger('warn', {\n                    message: 'invalid key ID provided for Widevine'\n                  });\n                  return;\n                } // if Widevine key attributes are valid, store them as `contentProtection`\n                // on the manifest to emulate Widevine tag structure in a DASH mpd\n\n\n                this.manifest.contentProtection = this.manifest.contentProtection || {};\n                this.manifest.contentProtection['com.widevine.alpha'] = {\n                  attributes: {\n                    schemeIdUri: entry.attributes.KEYFORMAT,\n                    // remove '0x' from the key id string\n                    keyId: entry.attributes.KEYID.substring(2)\n                  },\n                  // decode the base64-encoded PSSH box\n                  pssh: decodeB64ToUint8Array(entry.attributes.URI.split(',')[1])\n                };\n                return;\n              }\n\n              if (!entry.attributes.METHOD) {\n                this.trigger('warn', {\n                  message: 'defaulting key method to AES-128'\n                });\n              } // setup an encryption key for upcoming segments\n\n\n              _key = {\n                method: entry.attributes.METHOD || 'AES-128',\n                uri: entry.attributes.URI\n              };\n\n              if (typeof entry.attributes.IV !== 'undefined') {\n                _key.iv = entry.attributes.IV;\n              }\n            },\n            'media-sequence': function mediaSequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid media sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.mediaSequence = entry.number;\n            },\n            'discontinuity-sequence': function discontinuitySequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid discontinuity sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.discontinuitySequence = entry.number;\n              currentTimeline = entry.number;\n            },\n            'playlist-type': function playlistType() {\n              if (!/VOD|EVENT/.test(entry.playlistType)) {\n                this.trigger('warn', {\n                  message: 'ignoring unknown playlist type: ' + entry.playlist\n                });\n                return;\n              }\n\n              this.manifest.playlistType = entry.playlistType;\n            },\n            map: function map() {\n              currentMap = {};\n\n              if (entry.uri) {\n                currentMap.uri = entry.uri;\n              }\n\n              if (entry.byterange) {\n                currentMap.byterange = entry.byterange;\n              }\n\n              if (_key) {\n                currentMap.key = _key;\n              }\n            },\n            'stream-inf': function streamInf() {\n              this.manifest.playlists = uris;\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring empty stream-inf attributes'\n                });\n                return;\n              }\n\n              if (!currentUri.attributes) {\n                currentUri.attributes = {};\n              }\n\n              _extends(currentUri.attributes, entry.attributes);\n            },\n            media: function media() {\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n                this.trigger('warn', {\n                  message: 'ignoring incomplete or missing media group'\n                });\n                return;\n              } // find the media group, creating defaults as necessary\n\n\n              var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n              mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n              mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata\n\n              rendition = {\n                default: /yes/i.test(entry.attributes.DEFAULT)\n              };\n\n              if (rendition.default) {\n                rendition.autoselect = true;\n              } else {\n                rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n              }\n\n              if (entry.attributes.LANGUAGE) {\n                rendition.language = entry.attributes.LANGUAGE;\n              }\n\n              if (entry.attributes.URI) {\n                rendition.uri = entry.attributes.URI;\n              }\n\n              if (entry.attributes['INSTREAM-ID']) {\n                rendition.instreamId = entry.attributes['INSTREAM-ID'];\n              }\n\n              if (entry.attributes.CHARACTERISTICS) {\n                rendition.characteristics = entry.attributes.CHARACTERISTICS;\n              }\n\n              if (entry.attributes.FORCED) {\n                rendition.forced = /yes/i.test(entry.attributes.FORCED);\n              } // insert the new rendition\n\n\n              mediaGroup[entry.attributes.NAME] = rendition;\n            },\n            discontinuity: function discontinuity() {\n              currentTimeline += 1;\n              currentUri.discontinuity = true;\n              this.manifest.discontinuityStarts.push(uris.length);\n            },\n            'program-date-time': function programDateTime() {\n              if (typeof this.manifest.dateTimeString === 'undefined') {\n                // PROGRAM-DATE-TIME is a media-segment tag, but for backwards\n                // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag\n                // to the manifest object\n                // TODO: Consider removing this in future major version\n                this.manifest.dateTimeString = entry.dateTimeString;\n                this.manifest.dateTimeObject = entry.dateTimeObject;\n              }\n\n              currentUri.dateTimeString = entry.dateTimeString;\n              currentUri.dateTimeObject = entry.dateTimeObject;\n            },\n            targetduration: function targetduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid target duration: ' + entry.duration\n                });\n                return;\n              }\n\n              this.manifest.targetDuration = entry.duration;\n              setHoldBack.call(this, this.manifest);\n            },\n            start: function start() {\n              if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {\n                this.trigger('warn', {\n                  message: 'ignoring start declaration without appropriate attribute list'\n                });\n                return;\n              }\n\n              this.manifest.start = {\n                timeOffset: entry.attributes['TIME-OFFSET'],\n                precise: entry.attributes.PRECISE\n              };\n            },\n            'cue-out': function cueOut() {\n              currentUri.cueOut = entry.data;\n            },\n            'cue-out-cont': function cueOutCont() {\n              currentUri.cueOutCont = entry.data;\n            },\n            'cue-in': function cueIn() {\n              currentUri.cueIn = entry.data;\n            },\n            'skip': function skip() {\n              this.manifest.skip = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-SKIP', entry.attributes, ['SKIPPED-SEGMENTS']);\n            },\n            'part': function part() {\n              var _this2 = this;\n\n              hasParts = true; // parts are always specifed before a segment\n\n              var segmentIndex = this.manifest.segments.length;\n              var part = camelCaseKeys(entry.attributes);\n              currentUri.parts = currentUri.parts || [];\n              currentUri.parts.push(part);\n\n              if (part.byterange) {\n                if (!part.byterange.hasOwnProperty('offset')) {\n                  part.byterange.offset = lastPartByterangeEnd;\n                }\n\n                lastPartByterangeEnd = part.byterange.offset + part.byterange.length;\n              }\n\n              var partIndex = currentUri.parts.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PART #\" + partIndex + \" for segment #\" + segmentIndex, entry.attributes, ['URI', 'DURATION']);\n\n              if (this.manifest.renditionReports) {\n                this.manifest.renditionReports.forEach(function (r, i) {\n                  if (!r.hasOwnProperty('lastPart')) {\n                    _this2.trigger('warn', {\n                      message: \"#EXT-X-RENDITION-REPORT #\" + i + \" lacks required attribute(s): LAST-PART\"\n                    });\n                  }\n                });\n              }\n            },\n            'server-control': function serverControl() {\n              var attrs = this.manifest.serverControl = camelCaseKeys(entry.attributes);\n\n              if (!attrs.hasOwnProperty('canBlockReload')) {\n                attrs.canBlockReload = false;\n                this.trigger('info', {\n                  message: '#EXT-X-SERVER-CONTROL defaulting CAN-BLOCK-RELOAD to false'\n                });\n              }\n\n              setHoldBack.call(this, this.manifest);\n\n              if (attrs.canSkipDateranges && !attrs.hasOwnProperty('canSkipUntil')) {\n                this.trigger('warn', {\n                  message: '#EXT-X-SERVER-CONTROL lacks required attribute CAN-SKIP-UNTIL which is required when CAN-SKIP-DATERANGES is set'\n                });\n              }\n            },\n            'preload-hint': function preloadHint() {\n              // parts are always specifed before a segment\n              var segmentIndex = this.manifest.segments.length;\n              var hint = camelCaseKeys(entry.attributes);\n              var isPart = hint.type && hint.type === 'PART';\n              currentUri.preloadHints = currentUri.preloadHints || [];\n              currentUri.preloadHints.push(hint);\n\n              if (hint.byterange) {\n                if (!hint.byterange.hasOwnProperty('offset')) {\n                  // use last part byterange end or zero if not a part.\n                  hint.byterange.offset = isPart ? lastPartByterangeEnd : 0;\n\n                  if (isPart) {\n                    lastPartByterangeEnd = hint.byterange.offset + hint.byterange.length;\n                  }\n                }\n              }\n\n              var index = currentUri.preloadHints.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex, entry.attributes, ['TYPE', 'URI']);\n\n              if (!hint.type) {\n                return;\n              } // search through all preload hints except for the current one for\n              // a duplicate type.\n\n\n              for (var i = 0; i < currentUri.preloadHints.length - 1; i++) {\n                var otherHint = currentUri.preloadHints[i];\n\n                if (!otherHint.type) {\n                  continue;\n                }\n\n                if (otherHint.type === hint.type) {\n                  this.trigger('warn', {\n                    message: \"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex + \" has the same TYPE \" + hint.type + \" as preload hint #\" + i\n                  });\n                }\n              }\n            },\n            'rendition-report': function renditionReport() {\n              var report = camelCaseKeys(entry.attributes);\n              this.manifest.renditionReports = this.manifest.renditionReports || [];\n              this.manifest.renditionReports.push(report);\n              var index = this.manifest.renditionReports.length - 1;\n              var required = ['LAST-MSN', 'URI'];\n\n              if (hasParts) {\n                required.push('LAST-PART');\n              }\n\n              this.warnOnMissingAttributes_(\"#EXT-X-RENDITION-REPORT #\" + index, entry.attributes, required);\n            },\n            'part-inf': function partInf() {\n              this.manifest.partInf = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-PART-INF', entry.attributes, ['PART-TARGET']);\n\n              if (this.manifest.partInf.partTarget) {\n                this.manifest.partTargetDuration = this.manifest.partInf.partTarget;\n              }\n\n              setHoldBack.call(this, this.manifest);\n            }\n          })[entry.tagType] || noop).call(self);\n        },\n        uri: function uri() {\n          currentUri.uri = entry.uri;\n          uris.push(currentUri); // if no explicit duration was declared, use the target duration\n\n          if (this.manifest.targetDuration && !('duration' in currentUri)) {\n            this.trigger('warn', {\n              message: 'defaulting segment duration to the target duration'\n            });\n            currentUri.duration = this.manifest.targetDuration;\n          } // annotate with encryption information, if necessary\n\n\n          if (_key) {\n            currentUri.key = _key;\n          }\n\n          currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary\n\n          if (currentMap) {\n            currentUri.map = currentMap;\n          } // reset the last byterange end as it needs to be 0 between parts\n\n\n          lastPartByterangeEnd = 0; // prepare for the next URI\n\n          currentUri = {};\n        },\n        comment: function comment() {// comments are not important for playback\n        },\n        custom: function custom() {\n          // if this is segment-level data attach the output to the segment\n          if (entry.segment) {\n            currentUri.custom = currentUri.custom || {};\n            currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object\n          } else {\n            this.manifest.custom = this.manifest.custom || {};\n            this.manifest.custom[entry.customType] = entry.data;\n          }\n        }\n      })[entry.type].call(self);\n    });\n\n    return _this;\n  }\n\n  var _proto = Parser.prototype;\n\n  _proto.warnOnMissingAttributes_ = function warnOnMissingAttributes_(identifier, attributes, required) {\n    var missing = [];\n    required.forEach(function (key) {\n      if (!attributes.hasOwnProperty(key)) {\n        missing.push(key);\n      }\n    });\n\n    if (missing.length) {\n      this.trigger('warn', {\n        message: identifier + \" lacks required attribute(s): \" + missing.join(', ')\n      });\n    }\n  }\n  /**\n   * Parse the input string and update the manifest object.\n   *\n   * @param {string} chunk a potentially incomplete portion of the manifest\n   */\n  ;\n\n  _proto.push = function push(chunk) {\n    this.lineStream.push(chunk);\n  }\n  /**\n   * Flush any remaining input. This can be handy if the last line of an M3U8\n   * manifest did not contain a trailing newline but the file has been\n   * completely received.\n   */\n  ;\n\n  _proto.end = function end() {\n    // flush any buffered input\n    this.lineStream.push('\\n');\n    this.trigger('end');\n  }\n  /**\n   * Add an additional parser for non-standard tags\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.type         the type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(options) {\n    this.parseStream.addParser(options);\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(options) {\n    this.parseStream.addTagMapper(options);\n  };\n\n  return Parser;\n}(Stream);\n\nexport { LineStream, ParseStream, Parser };\n","'use strict';\n/* eslint-disable no-unused-vars -- required for functions `.length` */\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar apply = require('../internals/function-apply');\nvar wrapErrorConstructorWithCause = require('../internals/wrap-error-constructor-with-cause');\n\nvar WEB_ASSEMBLY = 'WebAssembly';\nvar WebAssembly = global[WEB_ASSEMBLY];\n\nvar FORCED = Error('e', { cause: 7 }).cause !== 7;\n\nvar exportGlobalErrorCauseWrapper = function (ERROR_NAME, wrapper) {\n  var O = {};\n  O[ERROR_NAME] = wrapErrorConstructorWithCause(ERROR_NAME, wrapper, FORCED);\n  $({ global: true, constructor: true, arity: 1, forced: FORCED }, O);\n};\n\nvar exportWebAssemblyErrorCauseWrapper = function (ERROR_NAME, wrapper) {\n  if (WebAssembly && WebAssembly[ERROR_NAME]) {\n    var O = {};\n    O[ERROR_NAME] = wrapErrorConstructorWithCause(WEB_ASSEMBLY + '.' + ERROR_NAME, wrapper, FORCED);\n    $({ target: WEB_ASSEMBLY, stat: true, constructor: true, arity: 1, forced: FORCED }, O);\n  }\n};\n\n// https://tc39.es/ecma262/#sec-nativeerror\nexportGlobalErrorCauseWrapper('Error', function (init) {\n  return function Error(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('EvalError', function (init) {\n  return function EvalError(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('RangeError', function (init) {\n  return function RangeError(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('ReferenceError', function (init) {\n  return function ReferenceError(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('SyntaxError', function (init) {\n  return function SyntaxError(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('TypeError', function (init) {\n  return function TypeError(message) { return apply(init, this, arguments); };\n});\nexportGlobalErrorCauseWrapper('URIError', function (init) {\n  return function URIError(message) { return apply(init, this, arguments); };\n});\nexportWebAssemblyErrorCauseWrapper('CompileError', function (init) {\n  return function CompileError(message) { return apply(init, this, arguments); };\n});\nexportWebAssemblyErrorCauseWrapper('LinkError', function (init) {\n  return function LinkError(message) { return apply(init, this, arguments); };\n});\nexportWebAssemblyErrorCauseWrapper('RuntimeError', function (init) {\n  return function RuntimeError(message) { return apply(init, this, arguments); };\n});\n","import window from 'global/window'; // const log2 = Math.log2 ? Math.log2 : (x) => (Math.log(x) / Math.log(2));\n\nvar repeat = function repeat(str, len) {\n  var acc = '';\n\n  while (len--) {\n    acc += str;\n  }\n\n  return acc;\n}; // count the number of bits it would take to represent a number\n// we used to do this with log2 but BigInt does not support builtin math\n// Math.ceil(log2(x));\n\n\nexport var countBits = function countBits(x) {\n  return x.toString(2).length;\n}; // count the number of whole bytes it would take to represent a number\n\nexport var countBytes = function countBytes(x) {\n  return Math.ceil(countBits(x) / 8);\n};\nexport var padStart = function padStart(b, len, str) {\n  if (str === void 0) {\n    str = ' ';\n  }\n\n  return (repeat(str, len) + b.toString()).slice(-len);\n};\nexport var isArrayBufferView = function isArrayBufferView(obj) {\n  if (ArrayBuffer.isView === 'function') {\n    return ArrayBuffer.isView(obj);\n  }\n\n  return obj && obj.buffer instanceof ArrayBuffer;\n};\nexport var isTypedArray = function isTypedArray(obj) {\n  return isArrayBufferView(obj);\n};\nexport var toUint8 = function toUint8(bytes) {\n  if (bytes instanceof Uint8Array) {\n    return bytes;\n  }\n\n  if (!Array.isArray(bytes) && !isTypedArray(bytes) && !(bytes instanceof ArrayBuffer)) {\n    // any non-number or NaN leads to empty uint8array\n    // eslint-disable-next-line\n    if (typeof bytes !== 'number' || typeof bytes === 'number' && bytes !== bytes) {\n      bytes = 0;\n    } else {\n      bytes = [bytes];\n    }\n  }\n\n  return new Uint8Array(bytes && bytes.buffer || bytes, bytes && bytes.byteOffset || 0, bytes && bytes.byteLength || 0);\n};\nexport var toHexString = function toHexString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(16), 2, '0');\n  }\n\n  return str;\n};\nexport var toBinaryString = function toBinaryString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(2), 8, '0');\n  }\n\n  return str;\n};\nvar BigInt = window.BigInt || Number;\nvar BYTE_TABLE = [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\nexport var ENDIANNESS = function () {\n  var a = new Uint16Array([0xFFCC]);\n  var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n\n  if (b[0] === 0xFF) {\n    return 'big';\n  }\n\n  if (b[0] === 0xCC) {\n    return 'little';\n  }\n\n  return 'unknown';\n}();\nexport var IS_BIG_ENDIAN = ENDIANNESS === 'big';\nexport var IS_LITTLE_ENDIAN = ENDIANNESS === 'little';\nexport var bytesToNumber = function bytesToNumber(bytes, _temp) {\n  var _ref = _temp === void 0 ? {} : _temp,\n      _ref$signed = _ref.signed,\n      signed = _ref$signed === void 0 ? false : _ref$signed,\n      _ref$le = _ref.le,\n      le = _ref$le === void 0 ? false : _ref$le;\n\n  bytes = toUint8(bytes);\n  var fn = le ? 'reduce' : 'reduceRight';\n  var obj = bytes[fn] ? bytes[fn] : Array.prototype[fn];\n  var number = obj.call(bytes, function (total, byte, i) {\n    var exponent = le ? i : Math.abs(i + 1 - bytes.length);\n    return total + BigInt(byte) * BYTE_TABLE[exponent];\n  }, BigInt(0));\n\n  if (signed) {\n    var max = BYTE_TABLE[bytes.length] / BigInt(2) - BigInt(1);\n    number = BigInt(number);\n\n    if (number > max) {\n      number -= max;\n      number -= max;\n      number -= BigInt(2);\n    }\n  }\n\n  return Number(number);\n};\nexport var numberToBytes = function numberToBytes(number, _temp2) {\n  var _ref2 = _temp2 === void 0 ? {} : _temp2,\n      _ref2$le = _ref2.le,\n      le = _ref2$le === void 0 ? false : _ref2$le;\n\n  // eslint-disable-next-line\n  if (typeof number !== 'bigint' && typeof number !== 'number' || typeof number === 'number' && number !== number) {\n    number = 0;\n  }\n\n  number = BigInt(number);\n  var byteCount = countBytes(number);\n  var bytes = new Uint8Array(new ArrayBuffer(byteCount));\n\n  for (var i = 0; i < byteCount; i++) {\n    var byteIndex = le ? i : Math.abs(i + 1 - bytes.length);\n    bytes[byteIndex] = Number(number / BYTE_TABLE[i] & BigInt(0xFF));\n\n    if (number < 0) {\n      bytes[byteIndex] = Math.abs(~bytes[byteIndex]);\n      bytes[byteIndex] -= i === 0 ? 1 : 2;\n    }\n  }\n\n  return bytes;\n};\nexport var bytesToString = function bytesToString(bytes) {\n  if (!bytes) {\n    return '';\n  } // TODO: should toUint8 handle cases where we only have 8 bytes\n  // but report more since this is a Uint16+ Array?\n\n\n  bytes = Array.prototype.slice.call(bytes);\n  var string = String.fromCharCode.apply(null, toUint8(bytes));\n\n  try {\n    return decodeURIComponent(escape(string));\n  } catch (e) {// if decodeURIComponent/escape fails, we are dealing with partial\n    // or full non string data. Just return the potentially garbled string.\n  }\n\n  return string;\n};\nexport var stringToBytes = function stringToBytes(string, stringIsBytes) {\n  if (typeof string !== 'string' && string && typeof string.toString === 'function') {\n    string = string.toString();\n  }\n\n  if (typeof string !== 'string') {\n    return new Uint8Array();\n  } // If the string already is bytes, we don't have to do this\n  // otherwise we do this so that we split multi length characters\n  // into individual bytes\n\n\n  if (!stringIsBytes) {\n    string = unescape(encodeURIComponent(string));\n  }\n\n  var view = new Uint8Array(string.length);\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view;\n};\nexport var concatTypedArrays = function concatTypedArrays() {\n  for (var _len = arguments.length, buffers = new Array(_len), _key = 0; _key < _len; _key++) {\n    buffers[_key] = arguments[_key];\n  }\n\n  buffers = buffers.filter(function (b) {\n    return b && (b.byteLength || b.length) && typeof b !== 'string';\n  });\n\n  if (buffers.length <= 1) {\n    // for 0 length we will return empty uint8\n    // for 1 length we return the first uint8\n    return toUint8(buffers[0]);\n  }\n\n  var totalLen = buffers.reduce(function (total, buf, i) {\n    return total + (buf.byteLength || buf.length);\n  }, 0);\n  var tempBuffer = new Uint8Array(totalLen);\n  var offset = 0;\n  buffers.forEach(function (buf) {\n    buf = toUint8(buf);\n    tempBuffer.set(buf, offset);\n    offset += buf.byteLength;\n  });\n  return tempBuffer;\n};\n/**\n * Check if the bytes \"b\" are contained within bytes \"a\".\n *\n * @param {Uint8Array|Array} a\n *        Bytes to check in\n *\n * @param {Uint8Array|Array} b\n *        Bytes to check for\n *\n * @param {Object} options\n *        options\n *\n * @param {Array|Uint8Array} [offset=0]\n *        offset to use when looking at bytes in a\n *\n * @param {Array|Uint8Array} [mask=[]]\n *        mask to use on bytes before comparison.\n *\n * @return {boolean}\n *         If all bytes in b are inside of a, taking into account\n *         bit masks.\n */\n\nexport var bytesMatch = function bytesMatch(a, b, _temp3) {\n  var _ref3 = _temp3 === void 0 ? {} : _temp3,\n      _ref3$offset = _ref3.offset,\n      offset = _ref3$offset === void 0 ? 0 : _ref3$offset,\n      _ref3$mask = _ref3.mask,\n      mask = _ref3$mask === void 0 ? [] : _ref3$mask;\n\n  a = toUint8(a);\n  b = toUint8(b); // ie 11 does not support uint8 every\n\n  var fn = b.every ? b.every : Array.prototype.every;\n  return b.length && a.length - offset >= b.length && // ie 11 doesn't support every on uin8\n  fn.call(b, function (bByte, i) {\n    var aByte = mask[i] ? mask[i] & a[offset + i] : a[offset + i];\n    return bByte === aByte;\n  });\n};\nexport var sliceBytes = function sliceBytes(src, start, end) {\n  if (Uint8Array.prototype.slice) {\n    return Uint8Array.prototype.slice.call(src, start, end);\n  }\n\n  return new Uint8Array(Array.prototype.slice.call(src, start, end));\n};\nexport var reverseBytes = function reverseBytes(src) {\n  if (src.reverse) {\n    return src.reverse();\n  }\n\n  return Array.prototype.reverse.call(src);\n};","// Source: http://jsfiddle.net/vWx8V/\n// http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes\n\n/**\n * Conenience method returns corresponding value for given keyName or keyCode.\n *\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Mixed}\n * @api public\n */\n\nfunction keyCode(searchInput) {\n  // Keyboard Events\n  if (searchInput && 'object' === typeof searchInput) {\n    var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode\n    if (hasKeyCode) searchInput = hasKeyCode\n  }\n\n  // Numbers\n  if ('number' === typeof searchInput) return names[searchInput]\n\n  // Everything else (cast to string)\n  var search = String(searchInput)\n\n  // check codes\n  var foundNamedKey = codes[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // check aliases\n  var foundNamedKey = aliases[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // weird character?\n  if (search.length === 1) return search.charCodeAt(0)\n\n  return undefined\n}\n\n/**\n * Compares a keyboard event with a given keyCode or keyName.\n *\n * @param {Event} event Keyboard event that should be tested\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Boolean}\n * @api public\n */\nkeyCode.isEventKey = function isEventKey(event, nameOrCode) {\n  if (event && 'object' === typeof event) {\n    var keyCode = event.which || event.keyCode || event.charCode\n    if (keyCode === null || keyCode === undefined) { return false; }\n    if (typeof nameOrCode === 'string') {\n      // check codes\n      var foundNamedKey = codes[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    \n      // check aliases\n      var foundNamedKey = aliases[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    } else if (typeof nameOrCode === 'number') {\n      return nameOrCode === keyCode;\n    }\n    return false;\n  }\n}\n\nexports = module.exports = keyCode;\n\n/**\n * Get by name\n *\n *   exports.code['enter'] // => 13\n */\n\nvar codes = exports.code = exports.codes = {\n  'backspace': 8,\n  'tab': 9,\n  'enter': 13,\n  'shift': 16,\n  'ctrl': 17,\n  'alt': 18,\n  'pause/break': 19,\n  'caps lock': 20,\n  'esc': 27,\n  'space': 32,\n  'page up': 33,\n  'page down': 34,\n  'end': 35,\n  'home': 36,\n  'left': 37,\n  'up': 38,\n  'right': 39,\n  'down': 40,\n  'insert': 45,\n  'delete': 46,\n  'command': 91,\n  'left command': 91,\n  'right command': 93,\n  'numpad *': 106,\n  'numpad +': 107,\n  'numpad -': 109,\n  'numpad .': 110,\n  'numpad /': 111,\n  'num lock': 144,\n  'scroll lock': 145,\n  'my computer': 182,\n  'my calculator': 183,\n  ';': 186,\n  '=': 187,\n  ',': 188,\n  '-': 189,\n  '.': 190,\n  '/': 191,\n  '`': 192,\n  '[': 219,\n  '\\\\': 220,\n  ']': 221,\n  \"'\": 222\n}\n\n// Helper aliases\n\nvar aliases = exports.aliases = {\n  'windows': 91,\n  '⇧': 16,\n  '⌥': 18,\n  '⌃': 17,\n  '⌘': 91,\n  'ctl': 17,\n  'control': 17,\n  'option': 18,\n  'pause': 19,\n  'break': 19,\n  'caps': 20,\n  'return': 13,\n  'escape': 27,\n  'spc': 32,\n  'spacebar': 32,\n  'pgup': 33,\n  'pgdn': 34,\n  'ins': 45,\n  'del': 46,\n  'cmd': 91\n}\n\n/*!\n * Programatically add the following\n */\n\n// lower case chars\nfor (i = 97; i < 123; i++) codes[String.fromCharCode(i)] = i - 32\n\n// numbers\nfor (var i = 48; i < 58; i++) codes[i - 48] = i\n\n// function keys\nfor (i = 1; i < 13; i++) codes['f'+i] = i + 111\n\n// numpad keys\nfor (i = 0; i < 10; i++) codes['numpad '+i] = i + 96\n\n/**\n * Get by code\n *\n *   exports.name[13] // => 'Enter'\n */\n\nvar names = exports.names = exports.title = {} // title for backward compat\n\n// Create reverse mapping\nfor (i in codes) names[codes[i]] = i\n\n// Add aliases\nfor (var alias in aliases) {\n  codes[alias] = aliases[alias]\n}\n","var NAMESPACE = require(\"./conventions\").NAMESPACE;\n\n//[4]   \tNameStartChar\t   ::=   \t\":\" | [A-Z] | \"_\" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]\n//[4a]   \tNameChar\t   ::=   \tNameStartChar | \"-\" | \".\" | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]\n//[5]   \tName\t   ::=   \tNameStartChar (NameChar)*\nvar nameStartChar = /[A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD]///\\u10000-\\uEFFFF\nvar nameChar = new RegExp(\"[\\\\-\\\\.0-9\"+nameStartChar.source.slice(1,-1)+\"\\\\u00B7\\\\u0300-\\\\u036F\\\\u203F-\\\\u2040]\");\nvar tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\\:'+nameStartChar.source+nameChar.source+'*)?$');\n//var tagNamePattern = /^[a-zA-Z_][\\w\\-\\.]*(?:\\:[a-zA-Z_][\\w\\-\\.]*)?$/\n//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')\n\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\nvar S_TAG = 0;//tag name offerring\nvar S_ATTR = 1;//attr name offerring\nvar S_ATTR_SPACE=2;//attr name end and space offer\nvar S_EQ = 3;//=space?\nvar S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)\nvar S_ATTR_END = 5;//attr value end and no space(quot end)\nvar S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)\nvar S_TAG_CLOSE = 7;//closed el<el />\n\n/**\n * Creates an error that will not be caught by XMLReader aka the SAX parser.\n *\n * @param {string} message\n * @param {any?} locator Optional, can provide details about the location in the source\n * @constructor\n */\nfunction ParseError(message, locator) {\n\tthis.message = message\n\tthis.locator = locator\n\tif(Error.captureStackTrace) Error.captureStackTrace(this, ParseError);\n}\nParseError.prototype = new Error();\nParseError.prototype.name = ParseError.name\n\nfunction XMLReader(){\n\n}\n\nXMLReader.prototype = {\n\tparse:function(source,defaultNSMap,entityMap){\n\t\tvar domBuilder = this.domBuilder;\n\t\tdomBuilder.startDocument();\n\t\t_copy(defaultNSMap ,defaultNSMap = {})\n\t\tparse(source,defaultNSMap,entityMap,\n\t\t\t\tdomBuilder,this.errorHandler);\n\t\tdomBuilder.endDocument();\n\t}\n}\nfunction parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){\n\tfunction fixedFromCharCode(code) {\n\t\t// String.prototype.fromCharCode does not supports\n\t\t// > 2 bytes unicode chars directly\n\t\tif (code > 0xffff) {\n\t\t\tcode -= 0x10000;\n\t\t\tvar surrogate1 = 0xd800 + (code >> 10)\n\t\t\t\t, surrogate2 = 0xdc00 + (code & 0x3ff);\n\n\t\t\treturn String.fromCharCode(surrogate1, surrogate2);\n\t\t} else {\n\t\t\treturn String.fromCharCode(code);\n\t\t}\n\t}\n\tfunction entityReplacer(a){\n\t\tvar k = a.slice(1,-1);\n\t\tif (Object.hasOwnProperty.call(entityMap, k)) {\n\t\t\treturn entityMap[k];\n\t\t}else if(k.charAt(0) === '#'){\n\t\t\treturn fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))\n\t\t}else{\n\t\t\terrorHandler.error('entity not found:'+a);\n\t\t\treturn a;\n\t\t}\n\t}\n\tfunction appendText(end){//has some bugs\n\t\tif(end>start){\n\t\t\tvar xt = source.substring(start,end).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\tlocator&&position(start);\n\t\t\tdomBuilder.characters(xt,0,end-start);\n\t\t\tstart = end\n\t\t}\n\t}\n\tfunction position(p,m){\n\t\twhile(p>=lineEnd && (m = linePattern.exec(source))){\n\t\t\tlineStart = m.index;\n\t\t\tlineEnd = lineStart + m[0].length;\n\t\t\tlocator.lineNumber++;\n\t\t\t//console.log('line++:',locator,startPos,endPos)\n\t\t}\n\t\tlocator.columnNumber = p-lineStart+1;\n\t}\n\tvar lineStart = 0;\n\tvar lineEnd = 0;\n\tvar linePattern = /.*(?:\\r\\n?|\\n)|.*$/g\n\tvar locator = domBuilder.locator;\n\n\tvar parseStack = [{currentNSMap:defaultNSMapCopy}]\n\tvar closeMap = {};\n\tvar start = 0;\n\twhile(true){\n\t\ttry{\n\t\t\tvar tagStart = source.indexOf('<',start);\n\t\t\tif(tagStart<0){\n\t\t\t\tif(!source.substr(start).match(/^\\s*$/)){\n\t\t\t\t\tvar doc = domBuilder.doc;\n\t    \t\t\tvar text = doc.createTextNode(source.substr(start));\n\t    \t\t\tdoc.appendChild(text);\n\t    \t\t\tdomBuilder.currentElement = text;\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tif(tagStart>start){\n\t\t\t\tappendText(tagStart);\n\t\t\t}\n\t\t\tswitch(source.charAt(tagStart+1)){\n\t\t\tcase '/':\n\t\t\t\tvar end = source.indexOf('>',tagStart+3);\n\t\t\t\tvar tagName = source.substring(tagStart + 2, end).replace(/[ \\t\\n\\r]+$/g, '');\n\t\t\t\tvar config = parseStack.pop();\n\t\t\t\tif(end<0){\n\n\t        \t\ttagName = source.substring(tagStart+2).replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' is not complete:'+config.tagName);\n\t        \t\tend = tagStart+1+tagName.length;\n\t        \t}else if(tagName.match(/\\s</)){\n\t        \t\ttagName = tagName.replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' maybe not complete');\n\t        \t\tend = tagStart+1+tagName.length;\n\t\t\t\t}\n\t\t\t\tvar localNSMap = config.localNSMap;\n\t\t\t\tvar endMatch = config.tagName == tagName;\n\t\t\t\tvar endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase()\n\t\t        if(endIgnoreCaseMach){\n\t\t        \tdomBuilder.endElement(config.uri,config.localName,tagName);\n\t\t\t\t\tif(localNSMap){\n\t\t\t\t\t\tfor (var prefix in localNSMap) {\n\t\t\t\t\t\t\tif (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n\t\t\t\t\t\t\t\tdomBuilder.endPrefixMapping(prefix);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif(!endMatch){\n\t\t            \terrorHandler.fatalError(\"end tag name: \"+tagName+' is not match the current start tagName:'+config.tagName ); // No known test case\n\t\t\t\t\t}\n\t\t        }else{\n\t\t        \tparseStack.push(config)\n\t\t        }\n\n\t\t\t\tend++;\n\t\t\t\tbreak;\n\t\t\t\t// end elment\n\t\t\tcase '?':// <?...?>\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseInstruction(source,tagStart,domBuilder);\n\t\t\t\tbreak;\n\t\t\tcase '!':// <!doctype,<![CDATA,<!--\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseDCC(source,tagStart,domBuilder,errorHandler);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tvar el = new ElementAttributes();\n\t\t\t\tvar currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\t\t\t\t//elStartEnd\n\t\t\t\tvar end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);\n\t\t\t\tvar len = el.length;\n\n\n\t\t\t\tif(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){\n\t\t\t\t\tel.closed = true;\n\t\t\t\t\tif(!entityMap.nbsp){\n\t\t\t\t\t\terrorHandler.warning('unclosed xml attribute');\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tif(locator && len){\n\t\t\t\t\tvar locator2 = copyLocator(locator,{});\n\t\t\t\t\t//try{//attribute position fixed\n\t\t\t\t\tfor(var i = 0;i<len;i++){\n\t\t\t\t\t\tvar a = el[i];\n\t\t\t\t\t\tposition(a.offset);\n\t\t\t\t\t\ta.locator = copyLocator(locator,{});\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator2\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator;\n\t\t\t\t}else{\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif (NAMESPACE.isHTML(el.uri) && !el.closed) {\n\t\t\t\t\tend = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder)\n\t\t\t\t} else {\n\t\t\t\t\tend++;\n\t\t\t\t}\n\t\t\t}\n\t\t}catch(e){\n\t\t\tif (e instanceof ParseError) {\n\t\t\t\tthrow e;\n\t\t\t}\n\t\t\terrorHandler.error('element parse error: '+e)\n\t\t\tend = -1;\n\t\t}\n\t\tif(end>start){\n\t\t\tstart = end;\n\t\t}else{\n\t\t\t//TODO: 这里有可能sax回退，有位置错误风险\n\t\t\tappendText(Math.max(tagStart,start)+1);\n\t\t}\n\t}\n}\nfunction copyLocator(f,t){\n\tt.lineNumber = f.lineNumber;\n\tt.columnNumber = f.columnNumber;\n\treturn t;\n}\n\n/**\n * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);\n * @return end of the elementStartPart(end of elementEndPart for selfClosed el)\n */\nfunction parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){\n\n\t/**\n\t * @param {string} qname\n\t * @param {string} value\n\t * @param {number} startIndex\n\t */\n\tfunction addAttribute(qname, value, startIndex) {\n\t\tif (el.attributeNames.hasOwnProperty(qname)) {\n\t\t\terrorHandler.fatalError('Attribute ' + qname + ' redefined')\n\t\t}\n\t\tel.addValue(\n\t\t\tqname,\n\t\t\t// @see https://www.w3.org/TR/xml/#AVNormalize\n\t\t\t// since the xmldom sax parser does not \"interpret\" DTD the following is not implemented:\n\t\t\t// - recursive replacement of (DTD) entity references\n\t\t\t// - trimming and collapsing multiple spaces into a single one for attributes that are not of type CDATA\n\t\t\tvalue.replace(/[\\t\\n\\r]/g, ' ').replace(/&#?\\w+;/g, entityReplacer),\n\t\t\tstartIndex\n\t\t)\n\t}\n\tvar attrName;\n\tvar value;\n\tvar p = ++start;\n\tvar s = S_TAG;//status\n\twhile(true){\n\t\tvar c = source.charAt(p);\n\t\tswitch(c){\n\t\tcase '=':\n\t\t\tif(s === S_ATTR){//attrName\n\t\t\t\tattrName = source.slice(start,p);\n\t\t\t\ts = S_EQ;\n\t\t\t}else if(s === S_ATTR_SPACE){\n\t\t\t\ts = S_EQ;\n\t\t\t}else{\n\t\t\t\t//fatalError: equal must after attrName or space after attrName\n\t\t\t\tthrow new Error('attribute equal must after attrName'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '\\'':\n\t\tcase '\"':\n\t\t\tif(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE\n\t\t\t\t){//equal\n\t\t\t\tif(s === S_ATTR){\n\t\t\t\t\terrorHandler.warning('attribute value must after \"=\"')\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t}\n\t\t\t\tstart = p+1;\n\t\t\t\tp = source.indexOf(c,start)\n\t\t\t\tif(p>0){\n\t\t\t\t\tvalue = source.slice(start, p);\n\t\t\t\t\taddAttribute(attrName, value, start-1);\n\t\t\t\t\ts = S_ATTR_END;\n\t\t\t\t}else{\n\t\t\t\t\t//fatalError: no end quot match\n\t\t\t\t\tthrow new Error('attribute value no end \\''+c+'\\' match');\n\t\t\t\t}\n\t\t\t}else if(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\tvalue = source.slice(start, p);\n\t\t\t\taddAttribute(attrName, value, start);\n\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed start quot('+c+')!!');\n\t\t\t\tstart = p+1;\n\t\t\t\ts = S_ATTR_END\n\t\t\t}else{\n\t\t\t\t//fatalError: no equal before\n\t\t\t\tthrow new Error('attribute value must after \"=\"'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '/':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\ts =S_TAG_CLOSE;\n\t\t\t\tel.closed = true;\n\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\tcase S_ATTR:\n\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_SPACE:\n\t\t\t\t\tel.closed = true;\n\t\t\t\tbreak;\n\t\t\t//case S_EQ:\n\t\t\tdefault:\n\t\t\t\tthrow new Error(\"attribute invalid close char('/')\") // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase ''://end document\n\t\t\terrorHandler.error('unexpected end of input');\n\t\t\tif(s == S_TAG){\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\t}\n\t\t\treturn p;\n\t\tcase '>':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\tbreak;//normal\n\t\t\tcase S_ATTR_NOQUOT_VALUE://Compatible state\n\t\t\tcase S_ATTR:\n\t\t\t\tvalue = source.slice(start,p);\n\t\t\t\tif(value.slice(-1) === '/'){\n\t\t\t\t\tel.closed  = true;\n\t\t\t\t\tvalue = value.slice(0,-1)\n\t\t\t\t}\n\t\t\tcase S_ATTR_SPACE:\n\t\t\t\tif(s === S_ATTR_SPACE){\n\t\t\t\t\tvalue = attrName;\n\t\t\t\t}\n\t\t\t\tif(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!');\n\t\t\t\t\taddAttribute(attrName, value, start)\n\t\t\t\t}else{\n\t\t\t\t\tif(!NAMESPACE.isHTML(currentNSMap['']) || !value.match(/^(?:disabled|checked|selected)$/i)){\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed value!! \"'+value+'\" instead!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(value, value, start)\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t\tcase S_EQ:\n\t\t\t\tthrow new Error('attribute value missed!!');\n\t\t\t}\n//\t\t\tconsole.log(tagName,tagNamePattern,tagNamePattern.test(tagName))\n\t\t\treturn p;\n\t\t/*xml space '\\x20' | #x9 | #xD | #xA; */\n\t\tcase '\\u0080':\n\t\t\tc = ' ';\n\t\tdefault:\n\t\t\tif(c<= ' '){//space\n\t\t\t\tswitch(s){\n\t\t\t\tcase S_TAG:\n\t\t\t\t\tel.setTagName(source.slice(start,p));//tagName\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR:\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t\ts = S_ATTR_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\t\t\tvar value = source.slice(start, p);\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!!');\n\t\t\t\t\taddAttribute(attrName, value, start)\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\t//case S_TAG_SPACE:\n\t\t\t\t//case S_EQ:\n\t\t\t\t//case S_ATTR_SPACE:\n\t\t\t\t//\tvoid();break;\n\t\t\t\t//case S_TAG_CLOSE:\n\t\t\t\t\t//ignore warning\n\t\t\t\t}\n\t\t\t}else{//not space\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\n\t\t\t\tswitch(s){\n\t\t\t\t//case S_TAG:void();break;\n\t\t\t\t//case S_ATTR:void();break;\n\t\t\t\t//case S_ATTR_NOQUOT_VALUE:void();break;\n\t\t\t\tcase S_ATTR_SPACE:\n\t\t\t\t\tvar tagName =  el.tagName;\n\t\t\t\t\tif (!NAMESPACE.isHTML(currentNSMap['']) || !attrName.match(/^(?:disabled|checked|selected)$/i)) {\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed value!! \"'+attrName+'\" instead2!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(attrName, attrName, start);\n\t\t\t\t\tstart = p;\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\terrorHandler.warning('attribute space is required\"'+attrName+'\"!!')\n\t\t\t\tcase S_TAG_SPACE:\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_EQ:\n\t\t\t\t\ts = S_ATTR_NOQUOT_VALUE;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_TAG_CLOSE:\n\t\t\t\t\tthrow new Error(\"elements closed character '/' and '>' must be connected to\");\n\t\t\t\t}\n\t\t\t}\n\t\t}//end outer switch\n\t\t//console.log('p++',p)\n\t\tp++;\n\t}\n}\n/**\n * @return true if has new namespace define\n */\nfunction appendElement(el,domBuilder,currentNSMap){\n\tvar tagName = el.tagName;\n\tvar localNSMap = null;\n\t//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\tvar i = el.length;\n\twhile(i--){\n\t\tvar a = el[i];\n\t\tvar qName = a.qName;\n\t\tvar value = a.value;\n\t\tvar nsp = qName.indexOf(':');\n\t\tif(nsp>0){\n\t\t\tvar prefix = a.prefix = qName.slice(0,nsp);\n\t\t\tvar localName = qName.slice(nsp+1);\n\t\t\tvar nsPrefix = prefix === 'xmlns' && localName\n\t\t}else{\n\t\t\tlocalName = qName;\n\t\t\tprefix = null\n\t\t\tnsPrefix = qName === 'xmlns' && ''\n\t\t}\n\t\t//can not set prefix,because prefix !== ''\n\t\ta.localName = localName ;\n\t\t//prefix == null for no ns prefix attribute\n\t\tif(nsPrefix !== false){//hack!!\n\t\t\tif(localNSMap == null){\n\t\t\t\tlocalNSMap = {}\n\t\t\t\t//console.log(currentNSMap,0)\n\t\t\t\t_copy(currentNSMap,currentNSMap={})\n\t\t\t\t//console.log(currentNSMap,1)\n\t\t\t}\n\t\t\tcurrentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;\n\t\t\ta.uri = NAMESPACE.XMLNS\n\t\t\tdomBuilder.startPrefixMapping(nsPrefix, value)\n\t\t}\n\t}\n\tvar i = el.length;\n\twhile(i--){\n\t\ta = el[i];\n\t\tvar prefix = a.prefix;\n\t\tif(prefix){//no prefix attribute has no namespace\n\t\t\tif(prefix === 'xml'){\n\t\t\t\ta.uri = NAMESPACE.XML;\n\t\t\t}if(prefix !== 'xmlns'){\n\t\t\t\ta.uri = currentNSMap[prefix || '']\n\n\t\t\t\t//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}\n\t\t\t}\n\t\t}\n\t}\n\tvar nsp = tagName.indexOf(':');\n\tif(nsp>0){\n\t\tprefix = el.prefix = tagName.slice(0,nsp);\n\t\tlocalName = el.localName = tagName.slice(nsp+1);\n\t}else{\n\t\tprefix = null;//important!!\n\t\tlocalName = el.localName = tagName;\n\t}\n\t//no prefix element has default namespace\n\tvar ns = el.uri = currentNSMap[prefix || ''];\n\tdomBuilder.startElement(ns,localName,tagName,el);\n\t//endPrefixMapping and startPrefixMapping have not any help for dom builder\n\t//localNSMap = null\n\tif(el.closed){\n\t\tdomBuilder.endElement(ns,localName,tagName);\n\t\tif(localNSMap){\n\t\t\tfor (prefix in localNSMap) {\n\t\t\t\tif (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n\t\t\t\t\tdomBuilder.endPrefixMapping(prefix);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}else{\n\t\tel.currentNSMap = currentNSMap;\n\t\tel.localNSMap = localNSMap;\n\t\t//parseStack.push(el);\n\t\treturn true;\n\t}\n}\nfunction parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){\n\tif(/^(?:script|textarea)$/i.test(tagName)){\n\t\tvar elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);\n\t\tvar text = source.substring(elStartEnd+1,elEndStart);\n\t\tif(/[&<]/.test(text)){\n\t\t\tif(/^script$/i.test(tagName)){\n\t\t\t\t//if(!/\\]\\]>/.test(text)){\n\t\t\t\t\t//lexHandler.startCDATA();\n\t\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\t\t//lexHandler.endCDATA();\n\t\t\t\t\treturn elEndStart;\n\t\t\t\t//}\n\t\t\t}//}else{//text area\n\t\t\t\ttext = text.replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\treturn elEndStart;\n\t\t\t//}\n\n\t\t}\n\t}\n\treturn elStartEnd+1;\n}\nfunction fixSelfClosed(source,elStartEnd,tagName,closeMap){\n\t//if(tagName in closeMap){\n\tvar pos = closeMap[tagName];\n\tif(pos == null){\n\t\t//console.log(tagName)\n\t\tpos =  source.lastIndexOf('</'+tagName+'>')\n\t\tif(pos<elStartEnd){//忘记闭合\n\t\t\tpos = source.lastIndexOf('</'+tagName)\n\t\t}\n\t\tcloseMap[tagName] =pos\n\t}\n\treturn pos<elStartEnd;\n\t//}\n}\n\nfunction _copy (source, target) {\n\tfor (var n in source) {\n\t\tif (Object.prototype.hasOwnProperty.call(source, n)) {\n\t\t\ttarget[n] = source[n];\n\t\t}\n\t}\n}\n\nfunction parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'\n\tvar next= source.charAt(start+2)\n\tswitch(next){\n\tcase '-':\n\t\tif(source.charAt(start + 3) === '-'){\n\t\t\tvar end = source.indexOf('-->',start+4);\n\t\t\t//append comment source.substring(4,end)//<!--\n\t\t\tif(end>start){\n\t\t\t\tdomBuilder.comment(source,start+4,end-start-4);\n\t\t\t\treturn end+3;\n\t\t\t}else{\n\t\t\t\terrorHandler.error(\"Unclosed comment\");\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}else{\n\t\t\t//error\n\t\t\treturn -1;\n\t\t}\n\tdefault:\n\t\tif(source.substr(start+3,6) == 'CDATA['){\n\t\t\tvar end = source.indexOf(']]>',start+9);\n\t\t\tdomBuilder.startCDATA();\n\t\t\tdomBuilder.characters(source,start+9,end-start-9);\n\t\t\tdomBuilder.endCDATA()\n\t\t\treturn end+3;\n\t\t}\n\t\t//<!DOCTYPE\n\t\t//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)\n\t\tvar matchs = split(source,start);\n\t\tvar len = matchs.length;\n\t\tif(len>1 && /!doctype/i.test(matchs[0][0])){\n\t\t\tvar name = matchs[1][0];\n\t\t\tvar pubid = false;\n\t\t\tvar sysid = false;\n\t\t\tif(len>3){\n\t\t\t\tif(/^public$/i.test(matchs[2][0])){\n\t\t\t\t\tpubid = matchs[3][0];\n\t\t\t\t\tsysid = len>4 && matchs[4][0];\n\t\t\t\t}else if(/^system$/i.test(matchs[2][0])){\n\t\t\t\t\tsysid = matchs[3][0];\n\t\t\t\t}\n\t\t\t}\n\t\t\tvar lastMatch = matchs[len-1]\n\t\t\tdomBuilder.startDTD(name, pubid, sysid);\n\t\t\tdomBuilder.endDTD();\n\n\t\t\treturn lastMatch.index+lastMatch[0].length\n\t\t}\n\t}\n\treturn -1;\n}\n\n\n\nfunction parseInstruction(source,start,domBuilder){\n\tvar end = source.indexOf('?>',start);\n\tif(end){\n\t\tvar match = source.substring(start,end).match(/^<\\?(\\S*)\\s*([\\s\\S]*?)\\s*$/);\n\t\tif(match){\n\t\t\tvar len = match[0].length;\n\t\t\tdomBuilder.processingInstruction(match[1], match[2]) ;\n\t\t\treturn end+2;\n\t\t}else{//error\n\t\t\treturn -1;\n\t\t}\n\t}\n\treturn -1;\n}\n\nfunction ElementAttributes(){\n\tthis.attributeNames = {}\n}\nElementAttributes.prototype = {\n\tsetTagName:function(tagName){\n\t\tif(!tagNamePattern.test(tagName)){\n\t\t\tthrow new Error('invalid tagName:'+tagName)\n\t\t}\n\t\tthis.tagName = tagName\n\t},\n\taddValue:function(qName, value, offset) {\n\t\tif(!tagNamePattern.test(qName)){\n\t\t\tthrow new Error('invalid attribute:'+qName)\n\t\t}\n\t\tthis.attributeNames[qName] = this.length;\n\t\tthis[this.length++] = {qName:qName,value:value,offset:offset}\n\t},\n\tlength:0,\n\tgetLocalName:function(i){return this[i].localName},\n\tgetLocator:function(i){return this[i].locator},\n\tgetQName:function(i){return this[i].qName},\n\tgetURI:function(i){return this[i].uri},\n\tgetValue:function(i){return this[i].value}\n//\t,getIndex:function(uri, localName)){\n//\t\tif(localName){\n//\n//\t\t}else{\n//\t\t\tvar qName = uri\n//\t\t}\n//\t},\n//\tgetValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},\n//\tgetType:function(uri,localName){}\n//\tgetType:function(i){},\n}\n\n\n\nfunction split(source,start){\n\tvar match;\n\tvar buf = [];\n\tvar reg = /'[^']+'|\"[^\"]+\"|[^\\s<>\\/=]+=?|(\\/?\\s*>|<)/g;\n\treg.lastIndex = start;\n\treg.exec(source);//skip <\n\twhile(match = reg.exec(source)){\n\t\tbuf.push(match);\n\t\tif(match[1])return buf;\n\t}\n}\n\nexports.XMLReader = XMLReader;\nexports.ParseError = ParseError;\n","var conventions = require(\"./conventions\");\n\nvar find = conventions.find;\nvar NAMESPACE = conventions.NAMESPACE;\n\n/**\n * A prerequisite for `[].filter`, to drop elements that are empty\n * @param {string} input\n * @returns {boolean}\n */\nfunction notEmptyString (input) {\n\treturn input !== ''\n}\n/**\n * @see https://infra.spec.whatwg.org/#split-on-ascii-whitespace\n * @see https://infra.spec.whatwg.org/#ascii-whitespace\n *\n * @param {string} input\n * @returns {string[]} (can be empty)\n */\nfunction splitOnASCIIWhitespace(input) {\n\t// U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, U+0020 SPACE\n\treturn input ? input.split(/[\\t\\n\\f\\r ]+/).filter(notEmptyString) : []\n}\n\n/**\n * Adds element as a key to current if it is not already present.\n *\n * @param {Record<string, boolean | undefined>} current\n * @param {string} element\n * @returns {Record<string, boolean | undefined>}\n */\nfunction orderedSetReducer (current, element) {\n\tif (!current.hasOwnProperty(element)) {\n\t\tcurrent[element] = true;\n\t}\n\treturn current;\n}\n\n/**\n * @see https://infra.spec.whatwg.org/#ordered-set\n * @param {string} input\n * @returns {string[]}\n */\nfunction toOrderedSet(input) {\n\tif (!input) return [];\n\tvar list = splitOnASCIIWhitespace(input);\n\treturn Object.keys(list.reduce(orderedSetReducer, {}))\n}\n\n/**\n * Uses `list.indexOf` to implement something like `Array.prototype.includes`,\n * which we can not rely on being available.\n *\n * @param {any[]} list\n * @returns {function(any): boolean}\n */\nfunction arrayIncludes (list) {\n\treturn function(element) {\n\t\treturn list && list.indexOf(element) !== -1;\n\t}\n}\n\nfunction copy(src,dest){\n\tfor(var p in src){\n\t\tif (Object.prototype.hasOwnProperty.call(src, p)) {\n\t\t\tdest[p] = src[p];\n\t\t}\n\t}\n}\n\n/**\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*((?:.*\\{\\s*?[\\r\\n][\\s\\S]*?^})|\\S.*?(?=[;\\r\\n]));?\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*(\\S.*?(?=[;\\r\\n]));?\n */\nfunction _extends(Class,Super){\n\tvar pt = Class.prototype;\n\tif(!(pt instanceof Super)){\n\t\tfunction t(){};\n\t\tt.prototype = Super.prototype;\n\t\tt = new t();\n\t\tcopy(pt,t);\n\t\tClass.prototype = pt = t;\n\t}\n\tif(pt.constructor != Class){\n\t\tif(typeof Class != 'function'){\n\t\t\tconsole.error(\"unknown Class:\"+Class)\n\t\t}\n\t\tpt.constructor = Class\n\t}\n}\n\n// Node Types\nvar NodeType = {}\nvar ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;\nvar ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;\nvar TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;\nvar CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;\nvar ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;\nvar ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;\nvar PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;\nvar COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;\nvar DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;\nvar DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;\nvar DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;\nvar NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;\n\n// ExceptionCode\nvar ExceptionCode = {}\nvar ExceptionMessage = {};\nvar INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]=\"Index size error\"),1);\nvar DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]=\"DOMString size error\"),2);\nvar HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]=\"Hierarchy request error\"),3);\nvar WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]=\"Wrong document\"),4);\nvar INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]=\"Invalid character\"),5);\nvar NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]=\"No data allowed\"),6);\nvar NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]=\"No modification allowed\"),7);\nvar NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]=\"Not found\"),8);\nvar NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]=\"Not supported\"),9);\nvar INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]=\"Attribute in use\"),10);\n//level2\nvar INVALID_STATE_ERR        \t= ExceptionCode.INVALID_STATE_ERR        \t= ((ExceptionMessage[11]=\"Invalid state\"),11);\nvar SYNTAX_ERR               \t= ExceptionCode.SYNTAX_ERR               \t= ((ExceptionMessage[12]=\"Syntax error\"),12);\nvar INVALID_MODIFICATION_ERR \t= ExceptionCode.INVALID_MODIFICATION_ERR \t= ((ExceptionMessage[13]=\"Invalid modification\"),13);\nvar NAMESPACE_ERR            \t= ExceptionCode.NAMESPACE_ERR           \t= ((ExceptionMessage[14]=\"Invalid namespace\"),14);\nvar INVALID_ACCESS_ERR       \t= ExceptionCode.INVALID_ACCESS_ERR      \t= ((ExceptionMessage[15]=\"Invalid access\"),15);\n\n/**\n * DOM Level 2\n * Object DOMException\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html\n * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html\n */\nfunction DOMException(code, message) {\n\tif(message instanceof Error){\n\t\tvar error = message;\n\t}else{\n\t\terror = this;\n\t\tError.call(this, ExceptionMessage[code]);\n\t\tthis.message = ExceptionMessage[code];\n\t\tif(Error.captureStackTrace) Error.captureStackTrace(this, DOMException);\n\t}\n\terror.code = code;\n\tif(message) this.message = this.message + \": \" + message;\n\treturn error;\n};\nDOMException.prototype = Error.prototype;\ncopy(ExceptionCode,DOMException)\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177\n * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.\n * The items in the NodeList are accessible via an integral index, starting from 0.\n */\nfunction NodeList() {\n};\nNodeList.prototype = {\n\t/**\n\t * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.\n\t * @standard level1\n\t */\n\tlength:0,\n\t/**\n\t * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.\n\t * @standard level1\n\t * @param index  unsigned long\n\t *   Index into the collection.\n\t * @return Node\n\t * \tThe node at the indexth position in the NodeList, or null if that is not a valid index.\n\t */\n\titem: function(index) {\n\t\treturn index >= 0 && index < this.length ? this[index] : null;\n\t},\n\ttoString:function(isHTML,nodeFilter){\n\t\tfor(var buf = [], i = 0;i<this.length;i++){\n\t\t\tserializeToString(this[i],buf,isHTML,nodeFilter);\n\t\t}\n\t\treturn buf.join('');\n\t},\n\t/**\n\t * @private\n\t * @param {function (Node):boolean} predicate\n\t * @returns {Node[]}\n\t */\n\tfilter: function (predicate) {\n\t\treturn Array.prototype.filter.call(this, predicate);\n\t},\n\t/**\n\t * @private\n\t * @param {Node} item\n\t * @returns {number}\n\t */\n\tindexOf: function (item) {\n\t\treturn Array.prototype.indexOf.call(this, item);\n\t},\n};\n\nfunction LiveNodeList(node,refresh){\n\tthis._node = node;\n\tthis._refresh = refresh\n\t_updateLiveList(this);\n}\nfunction _updateLiveList(list){\n\tvar inc = list._node._inc || list._node.ownerDocument._inc;\n\tif (list._inc !== inc) {\n\t\tvar ls = list._refresh(list._node);\n\t\t__set__(list,'length',ls.length);\n\t\tif (!list.$$length || ls.length < list.$$length) {\n\t\t\tfor (var i = ls.length; i in list; i++) {\n\t\t\t\tif (Object.prototype.hasOwnProperty.call(list, i)) {\n\t\t\t\t\tdelete list[i];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tcopy(ls,list);\n\t\tlist._inc = inc;\n\t}\n}\nLiveNodeList.prototype.item = function(i){\n\t_updateLiveList(this);\n\treturn this[i] || null;\n}\n\n_extends(LiveNodeList,NodeList);\n\n/**\n * Objects implementing the NamedNodeMap interface are used\n * to represent collections of nodes that can be accessed by name.\n * Note that NamedNodeMap does not inherit from NodeList;\n * NamedNodeMaps are not maintained in any particular order.\n * Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index,\n * but this is simply to allow convenient enumeration of the contents of a NamedNodeMap,\n * and does not imply that the DOM specifies an order to these Nodes.\n * NamedNodeMap objects in the DOM are live.\n * used for attributes or DocumentType entities\n */\nfunction NamedNodeMap() {\n};\n\nfunction _findNodeIndex(list,node){\n\tvar i = list.length;\n\twhile(i--){\n\t\tif(list[i] === node){return i}\n\t}\n}\n\nfunction _addNamedNode(el,list,newAttr,oldAttr){\n\tif(oldAttr){\n\t\tlist[_findNodeIndex(list,oldAttr)] = newAttr;\n\t}else{\n\t\tlist[list.length++] = newAttr;\n\t}\n\tif(el){\n\t\tnewAttr.ownerElement = el;\n\t\tvar doc = el.ownerDocument;\n\t\tif(doc){\n\t\t\toldAttr && _onRemoveAttribute(doc,el,oldAttr);\n\t\t\t_onAddAttribute(doc,el,newAttr);\n\t\t}\n\t}\n}\nfunction _removeNamedNode(el,list,attr){\n\t//console.log('remove attr:'+attr)\n\tvar i = _findNodeIndex(list,attr);\n\tif(i>=0){\n\t\tvar lastIndex = list.length-1\n\t\twhile(i<lastIndex){\n\t\t\tlist[i] = list[++i]\n\t\t}\n\t\tlist.length = lastIndex;\n\t\tif(el){\n\t\t\tvar doc = el.ownerDocument;\n\t\t\tif(doc){\n\t\t\t\t_onRemoveAttribute(doc,el,attr);\n\t\t\t\tattr.ownerElement = null;\n\t\t\t}\n\t\t}\n\t}else{\n\t\tthrow new DOMException(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))\n\t}\n}\nNamedNodeMap.prototype = {\n\tlength:0,\n\titem:NodeList.prototype.item,\n\tgetNamedItem: function(key) {\n//\t\tif(key.indexOf(':')>0 || key == 'xmlns'){\n//\t\t\treturn null;\n//\t\t}\n\t\t//console.log()\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar attr = this[i];\n\t\t\t//console.log(attr.nodeName,key)\n\t\t\tif(attr.nodeName == key){\n\t\t\t\treturn attr;\n\t\t\t}\n\t\t}\n\t},\n\tsetNamedItem: function(attr) {\n\t\tvar el = attr.ownerElement;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\tvar oldAttr = this.getNamedItem(attr.nodeName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\t/* returns Node */\n\tsetNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR\n\t\tvar el = attr.ownerElement, oldAttr;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\toldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\n\t/* returns Node */\n\tremoveNamedItem: function(key) {\n\t\tvar attr = this.getNamedItem(key);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\n\n\t},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR\n\n\t//for level2\n\tremoveNamedItemNS:function(namespaceURI,localName){\n\t\tvar attr = this.getNamedItemNS(namespaceURI,localName);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\t},\n\tgetNamedItemNS: function(namespaceURI, localName) {\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar node = this[i];\n\t\t\tif(node.localName == localName && node.namespaceURI == namespaceURI){\n\t\t\t\treturn node;\n\t\t\t}\n\t\t}\n\t\treturn null;\n\t}\n};\n\n/**\n * The DOMImplementation interface represents an object providing methods\n * which are not dependent on any particular document.\n * Such an object is returned by the `Document.implementation` property.\n *\n * __The individual methods describe the differences compared to the specs.__\n *\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation MDN\n * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490 DOM Level 1 Core (Initial)\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-102161490 DOM Level 2 Core\n * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 DOM Level 3 Core\n * @see https://dom.spec.whatwg.org/#domimplementation DOM Living Standard\n */\nfunction DOMImplementation() {\n}\n\nDOMImplementation.prototype = {\n\t/**\n\t * The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.\n\t * The different implementations fairly diverged in what kind of features were reported.\n\t * The latest version of the spec settled to force this method to always return true, where the functionality was accurate and in use.\n\t *\n\t * @deprecated It is deprecated and modern browsers return true in all cases.\n\t *\n\t * @param {string} feature\n\t * @param {string} [version]\n\t * @returns {boolean} always true\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/hasFeature MDN\n\t * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-5CED94D7 DOM Level 1 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature DOM Living Standard\n\t */\n\thasFeature: function(feature, version) {\n\t\t\treturn true;\n\t},\n\t/**\n\t * Creates an XML Document object of the specified type with its document element.\n\t *\n\t * __It behaves slightly different from the description in the living standard__:\n\t * - There is no interface/class `XMLDocument`, it returns a `Document` instance.\n\t * - `contentType`, `encoding`, `mode`, `origin`, `url` fields are currently not declared.\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string|null} namespaceURI\n\t * @param {string} qualifiedName\n\t * @param {DocumentType=null} doctype\n\t * @returns {Document}\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocument MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocument DOM Level 2 Core (initial)\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument  DOM Level 2 Core\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocument: function(namespaceURI,  qualifiedName, doctype){\n\t\tvar doc = new Document();\n\t\tdoc.implementation = this;\n\t\tdoc.childNodes = new NodeList();\n\t\tdoc.doctype = doctype || null;\n\t\tif (doctype){\n\t\t\tdoc.appendChild(doctype);\n\t\t}\n\t\tif (qualifiedName){\n\t\t\tvar root = doc.createElementNS(namespaceURI, qualifiedName);\n\t\t\tdoc.appendChild(root);\n\t\t}\n\t\treturn doc;\n\t},\n\t/**\n\t * Returns a doctype, with the given `qualifiedName`, `publicId`, and `systemId`.\n\t *\n\t * __This behavior is slightly different from the in the specs__:\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string} qualifiedName\n\t * @param {string} [publicId]\n\t * @param {string} [systemId]\n\t * @returns {DocumentType} which can either be used with `DOMImplementation.createDocument` upon document creation\n\t * \t\t\t\t  or can be put into the document via methods like `Node.insertBefore()` or `Node.replaceChild()`\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocType DOM Level 2 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype DOM Living Standard\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocumentType: function(qualifiedName, publicId, systemId){\n\t\tvar node = new DocumentType();\n\t\tnode.name = qualifiedName;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.publicId = publicId || '';\n\t\tnode.systemId = systemId || '';\n\n\t\treturn node;\n\t}\n};\n\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247\n */\n\nfunction Node() {\n};\n\nNode.prototype = {\n\tfirstChild : null,\n\tlastChild : null,\n\tpreviousSibling : null,\n\tnextSibling : null,\n\tattributes : null,\n\tparentNode : null,\n\tchildNodes : null,\n\townerDocument : null,\n\tnodeValue : null,\n\tnamespaceURI : null,\n\tprefix : null,\n\tlocalName : null,\n\t// Modified in DOM Level 2:\n\tinsertBefore:function(newChild, refChild){//raises\n\t\treturn _insertBefore(this,newChild,refChild);\n\t},\n\treplaceChild:function(newChild, oldChild){//raises\n\t\t_insertBefore(this, newChild,oldChild, assertPreReplacementValidityInDocument);\n\t\tif(oldChild){\n\t\t\tthis.removeChild(oldChild);\n\t\t}\n\t},\n\tremoveChild:function(oldChild){\n\t\treturn _removeChild(this,oldChild);\n\t},\n\tappendChild:function(newChild){\n\t\treturn this.insertBefore(newChild,null);\n\t},\n\thasChildNodes:function(){\n\t\treturn this.firstChild != null;\n\t},\n\tcloneNode:function(deep){\n\t\treturn cloneNode(this.ownerDocument||this,this,deep);\n\t},\n\t// Modified in DOM Level 2:\n\tnormalize:function(){\n\t\tvar child = this.firstChild;\n\t\twhile(child){\n\t\t\tvar next = child.nextSibling;\n\t\t\tif(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){\n\t\t\t\tthis.removeChild(next);\n\t\t\t\tchild.appendData(next.data);\n\t\t\t}else{\n\t\t\t\tchild.normalize();\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t}\n\t},\n  \t// Introduced in DOM Level 2:\n\tisSupported:function(feature, version){\n\t\treturn this.ownerDocument.implementation.hasFeature(feature,version);\n\t},\n    // Introduced in DOM Level 2:\n    hasAttributes:function(){\n    \treturn this.attributes.length>0;\n    },\n\t/**\n\t * Look up the prefix associated to the given namespace URI, starting from this node.\n\t * **The default namespace declarations are ignored by this method.**\n\t * See Namespace Prefix Lookup for details on the algorithm used by this method.\n\t *\n\t * _Note: The implementation seems to be incomplete when compared to the algorithm described in the specs._\n\t *\n\t * @param {string | null} namespaceURI\n\t * @returns {string | null}\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespacePrefix\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo\n\t * @see https://dom.spec.whatwg.org/#dom-node-lookupprefix\n\t * @see https://github.com/xmldom/xmldom/issues/322\n\t */\n    lookupPrefix:function(namespaceURI){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tfor(var n in map){\n\t\t\t\t\t\tif (Object.prototype.hasOwnProperty.call(map, n) && map[n] === namespaceURI) {\n\t\t\t\t\t\t\treturn n;\n\t\t\t\t\t\t}\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    lookupNamespaceURI:function(prefix){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tif(Object.prototype.hasOwnProperty.call(map, prefix)){\n    \t\t\t\treturn map[prefix] ;\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    isDefaultNamespace:function(namespaceURI){\n    \tvar prefix = this.lookupPrefix(namespaceURI);\n    \treturn prefix == null;\n    }\n};\n\n\nfunction _xmlEncoder(c){\n\treturn c == '<' && '&lt;' ||\n         c == '>' && '&gt;' ||\n         c == '&' && '&amp;' ||\n         c == '\"' && '&quot;' ||\n         '&#'+c.charCodeAt()+';'\n}\n\n\ncopy(NodeType,Node);\ncopy(NodeType,Node.prototype);\n\n/**\n * @param callback return true for continue,false for break\n * @return boolean true: break visit;\n */\nfunction _visitNode(node,callback){\n\tif(callback(node)){\n\t\treturn true;\n\t}\n\tif(node = node.firstChild){\n\t\tdo{\n\t\t\tif(_visitNode(node,callback)){return true}\n        }while(node=node.nextSibling)\n    }\n}\n\n\n\nfunction Document(){\n\tthis.ownerDocument = this;\n}\n\nfunction _onAddAttribute(doc,el,newAttr){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tel._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value\n\t}\n}\n\nfunction _onRemoveAttribute(doc,el,newAttr,remove){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tdelete el._nsMap[newAttr.prefix?newAttr.localName:'']\n\t}\n}\n\n/**\n * Updates `el.childNodes`, updating the indexed items and it's `length`.\n * Passing `newChild` means it will be appended.\n * Otherwise it's assumed that an item has been removed,\n * and `el.firstNode` and it's `.nextSibling` are used\n * to walk the current list of child nodes.\n *\n * @param {Document} doc\n * @param {Node} el\n * @param {Node} [newChild]\n * @private\n */\nfunction _onUpdateChild (doc, el, newChild) {\n\tif(doc && doc._inc){\n\t\tdoc._inc++;\n\t\t//update childNodes\n\t\tvar cs = el.childNodes;\n\t\tif (newChild) {\n\t\t\tcs[cs.length++] = newChild;\n\t\t} else {\n\t\t\tvar child = el.firstChild;\n\t\t\tvar i = 0;\n\t\t\twhile (child) {\n\t\t\t\tcs[i++] = child;\n\t\t\t\tchild = child.nextSibling;\n\t\t\t}\n\t\t\tcs.length = i;\n\t\t\tdelete cs[cs.length];\n\t\t}\n\t}\n}\n\n/**\n * Removes the connections between `parentNode` and `child`\n * and any existing `child.previousSibling` or `child.nextSibling`.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n *\n * @param {Node} parentNode\n * @param {Node} child\n * @returns {Node} the child that was removed.\n * @private\n */\nfunction _removeChild (parentNode, child) {\n\tvar previous = child.previousSibling;\n\tvar next = child.nextSibling;\n\tif (previous) {\n\t\tprevious.nextSibling = next;\n\t} else {\n\t\tparentNode.firstChild = next;\n\t}\n\tif (next) {\n\t\tnext.previousSibling = previous;\n\t} else {\n\t\tparentNode.lastChild = previous;\n\t}\n\tchild.parentNode = null;\n\tchild.previousSibling = null;\n\tchild.nextSibling = null;\n\t_onUpdateChild(parentNode.ownerDocument, parentNode);\n\treturn child;\n}\n\n/**\n * Returns `true` if `node` can be a parent for insertion.\n * @param {Node} node\n * @returns {boolean}\n */\nfunction hasValidParentNodeType(node) {\n\treturn (\n\t\tnode &&\n\t\t(node.nodeType === Node.DOCUMENT_NODE || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.ELEMENT_NODE)\n\t);\n}\n\n/**\n * Returns `true` if `node` can be inserted according to it's `nodeType`.\n * @param {Node} node\n * @returns {boolean}\n */\nfunction hasInsertableNodeType(node) {\n\treturn (\n\t\tnode &&\n\t\t(isElementNode(node) ||\n\t\t\tisTextNode(node) ||\n\t\t\tisDocTypeNode(node) ||\n\t\t\tnode.nodeType === Node.DOCUMENT_FRAGMENT_NODE ||\n\t\t\tnode.nodeType === Node.COMMENT_NODE ||\n\t\t\tnode.nodeType === Node.PROCESSING_INSTRUCTION_NODE)\n\t);\n}\n\n/**\n * Returns true if `node` is a DOCTYPE node\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isDocTypeNode(node) {\n\treturn node && node.nodeType === Node.DOCUMENT_TYPE_NODE;\n}\n\n/**\n * Returns true if the node is an element\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isElementNode(node) {\n\treturn node && node.nodeType === Node.ELEMENT_NODE;\n}\n/**\n * Returns true if `node` is a text node\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isTextNode(node) {\n\treturn node && node.nodeType === Node.TEXT_NODE;\n}\n\n/**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Document} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction isElementInsertionPossible(doc, child) {\n\tvar parentChildNodes = doc.childNodes || [];\n\tif (find(parentChildNodes, isElementNode) || isDocTypeNode(child)) {\n\t\treturn false;\n\t}\n\tvar docTypeNode = find(parentChildNodes, isDocTypeNode);\n\treturn !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n}\n\n/**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Node} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction isElementReplacementPossible(doc, child) {\n\tvar parentChildNodes = doc.childNodes || [];\n\n\tfunction hasElementChildThatIsNotChild(node) {\n\t\treturn isElementNode(node) && node !== child;\n\t}\n\n\tif (find(parentChildNodes, hasElementChildThatIsNotChild)) {\n\t\treturn false;\n\t}\n\tvar docTypeNode = find(parentChildNodes, isDocTypeNode);\n\treturn !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n}\n\n/**\n * @private\n * Steps 1-5 of the checks before inserting and before replacing a child are the same.\n *\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreInsertionValidity1to5(parent, node, child) {\n\t// 1. If `parent` is not a Document, DocumentFragment, or Element node, then throw a \"HierarchyRequestError\" DOMException.\n\tif (!hasValidParentNodeType(parent)) {\n\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected parent node type ' + parent.nodeType);\n\t}\n\t// 2. If `node` is a host-including inclusive ancestor of `parent`, then throw a \"HierarchyRequestError\" DOMException.\n\t// not implemented!\n\t// 3. If `child` is non-null and its parent is not `parent`, then throw a \"NotFoundError\" DOMException.\n\tif (child && child.parentNode !== parent) {\n\t\tthrow new DOMException(NOT_FOUND_ERR, 'child not in parent');\n\t}\n\tif (\n\t\t// 4. If `node` is not a DocumentFragment, DocumentType, Element, or CharacterData node, then throw a \"HierarchyRequestError\" DOMException.\n\t\t!hasInsertableNodeType(node) ||\n\t\t// 5. If either `node` is a Text node and `parent` is a document,\n\t\t// the sax parser currently adds top level text nodes, this will be fixed in 0.9.0\n\t\t// || (node.nodeType === Node.TEXT_NODE && parent.nodeType === Node.DOCUMENT_NODE)\n\t\t// or `node` is a doctype and `parent` is not a document, then throw a \"HierarchyRequestError\" DOMException.\n\t\t(isDocTypeNode(node) && parent.nodeType !== Node.DOCUMENT_NODE)\n\t) {\n\t\tthrow new DOMException(\n\t\t\tHIERARCHY_REQUEST_ERR,\n\t\t\t'Unexpected node type ' + node.nodeType + ' for parent node type ' + parent.nodeType\n\t\t);\n\t}\n}\n\n/**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreInsertionValidityInDocument(parent, node, child) {\n\tvar parentChildNodes = parent.childNodes || [];\n\tvar nodeChildNodes = node.childNodes || [];\n\n\t// DocumentFragment\n\tif (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n\t\tvar nodeChildElements = nodeChildNodes.filter(isElementNode);\n\t\t// If node has more than one element child or has a Text node child.\n\t\tif (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n\t\t}\n\t\t// Otherwise, if `node` has one element child and either `parent` has an element child,\n\t\t// `child` is a doctype, or `child` is non-null and a doctype is following `child`.\n\t\tif (nodeChildElements.length === 1 && !isElementInsertionPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n\t\t}\n\t}\n\t// Element\n\tif (isElementNode(node)) {\n\t\t// `parent` has an element child, `child` is a doctype,\n\t\t// or `child` is non-null and a doctype is following `child`.\n\t\tif (!isElementInsertionPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n\t\t}\n\t}\n\t// DocumentType\n\tif (isDocTypeNode(node)) {\n\t\t// `parent` has a doctype child,\n\t\tif (find(parentChildNodes, isDocTypeNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n\t\t}\n\t\tvar parentElementChild = find(parentChildNodes, isElementNode);\n\t\t// `child` is non-null and an element is preceding `child`,\n\t\tif (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n\t\t}\n\t\t// or `child` is null and `parent` has an element child.\n\t\tif (!child && parentElementChild) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can not be appended since element is present');\n\t\t}\n\t}\n}\n\n/**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreReplacementValidityInDocument(parent, node, child) {\n\tvar parentChildNodes = parent.childNodes || [];\n\tvar nodeChildNodes = node.childNodes || [];\n\n\t// DocumentFragment\n\tif (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n\t\tvar nodeChildElements = nodeChildNodes.filter(isElementNode);\n\t\t// If `node` has more than one element child or has a Text node child.\n\t\tif (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n\t\t}\n\t\t// Otherwise, if `node` has one element child and either `parent` has an element child that is not `child` or a doctype is following `child`.\n\t\tif (nodeChildElements.length === 1 && !isElementReplacementPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n\t\t}\n\t}\n\t// Element\n\tif (isElementNode(node)) {\n\t\t// `parent` has an element child that is not `child` or a doctype is following `child`.\n\t\tif (!isElementReplacementPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n\t\t}\n\t}\n\t// DocumentType\n\tif (isDocTypeNode(node)) {\n\t\tfunction hasDoctypeChildThatIsNotChild(node) {\n\t\t\treturn isDocTypeNode(node) && node !== child;\n\t\t}\n\n\t\t// `parent` has a doctype child that is not `child`,\n\t\tif (find(parentChildNodes, hasDoctypeChildThatIsNotChild)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n\t\t}\n\t\tvar parentElementChild = find(parentChildNodes, isElementNode);\n\t\t// or an element is preceding `child`.\n\t\tif (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n\t\t}\n\t}\n}\n\n/**\n * @private\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction _insertBefore(parent, node, child, _inDocumentAssertion) {\n\t// To ensure pre-insertion validity of a node into a parent before a child, run these steps:\n\tassertPreInsertionValidity1to5(parent, node, child);\n\n\t// If parent is a document, and any of the statements below, switched on the interface node implements,\n\t// are true, then throw a \"HierarchyRequestError\" DOMException.\n\tif (parent.nodeType === Node.DOCUMENT_NODE) {\n\t\t(_inDocumentAssertion || assertPreInsertionValidityInDocument)(parent, node, child);\n\t}\n\n\tvar cp = node.parentNode;\n\tif(cp){\n\t\tcp.removeChild(node);//remove and update\n\t}\n\tif(node.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\tvar newFirst = node.firstChild;\n\t\tif (newFirst == null) {\n\t\t\treturn node;\n\t\t}\n\t\tvar newLast = node.lastChild;\n\t}else{\n\t\tnewFirst = newLast = node;\n\t}\n\tvar pre = child ? child.previousSibling : parent.lastChild;\n\n\tnewFirst.previousSibling = pre;\n\tnewLast.nextSibling = child;\n\n\n\tif(pre){\n\t\tpre.nextSibling = newFirst;\n\t}else{\n\t\tparent.firstChild = newFirst;\n\t}\n\tif(child == null){\n\t\tparent.lastChild = newLast;\n\t}else{\n\t\tchild.previousSibling = newLast;\n\t}\n\tdo{\n\t\tnewFirst.parentNode = parent;\n\t}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))\n\t_onUpdateChild(parent.ownerDocument||parent, parent);\n\t//console.log(parent.lastChild.nextSibling == null)\n\tif (node.nodeType == DOCUMENT_FRAGMENT_NODE) {\n\t\tnode.firstChild = node.lastChild = null;\n\t}\n\treturn node;\n}\n\n/**\n * Appends `newChild` to `parentNode`.\n * If `newChild` is already connected to a `parentNode` it is first removed from it.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n * @param {Node} parentNode\n * @param {Node} newChild\n * @returns {Node}\n * @private\n */\nfunction _appendSingleChild (parentNode, newChild) {\n\tif (newChild.parentNode) {\n\t\tnewChild.parentNode.removeChild(newChild);\n\t}\n\tnewChild.parentNode = parentNode;\n\tnewChild.previousSibling = parentNode.lastChild;\n\tnewChild.nextSibling = null;\n\tif (newChild.previousSibling) {\n\t\tnewChild.previousSibling.nextSibling = newChild;\n\t} else {\n\t\tparentNode.firstChild = newChild;\n\t}\n\tparentNode.lastChild = newChild;\n\t_onUpdateChild(parentNode.ownerDocument, parentNode, newChild);\n\treturn newChild;\n}\n\nDocument.prototype = {\n\t//implementation : null,\n\tnodeName :  '#document',\n\tnodeType :  DOCUMENT_NODE,\n\t/**\n\t * The DocumentType node of the document.\n\t *\n\t * @readonly\n\t * @type DocumentType\n\t */\n\tdoctype :  null,\n\tdocumentElement :  null,\n\t_inc : 1,\n\n\tinsertBefore :  function(newChild, refChild){//raises\n\t\tif(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){\n\t\t\tvar child = newChild.firstChild;\n\t\t\twhile(child){\n\t\t\t\tvar next = child.nextSibling;\n\t\t\t\tthis.insertBefore(child,refChild);\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t\treturn newChild;\n\t\t}\n\t\t_insertBefore(this, newChild, refChild);\n\t\tnewChild.ownerDocument = this;\n\t\tif (this.documentElement === null && newChild.nodeType === ELEMENT_NODE) {\n\t\t\tthis.documentElement = newChild;\n\t\t}\n\n\t\treturn newChild;\n\t},\n\tremoveChild :  function(oldChild){\n\t\tif(this.documentElement == oldChild){\n\t\t\tthis.documentElement = null;\n\t\t}\n\t\treturn _removeChild(this,oldChild);\n\t},\n\treplaceChild: function (newChild, oldChild) {\n\t\t//raises\n\t\t_insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);\n\t\tnewChild.ownerDocument = this;\n\t\tif (oldChild) {\n\t\t\tthis.removeChild(oldChild);\n\t\t}\n\t\tif (isElementNode(newChild)) {\n\t\t\tthis.documentElement = newChild;\n\t\t}\n\t},\n\t// Introduced in DOM Level 2:\n\timportNode : function(importedNode,deep){\n\t\treturn importNode(this,importedNode,deep);\n\t},\n\t// Introduced in DOM Level 2:\n\tgetElementById :\tfunction(id){\n\t\tvar rtv = null;\n\t\t_visitNode(this.documentElement,function(node){\n\t\t\tif(node.nodeType == ELEMENT_NODE){\n\t\t\t\tif(node.getAttribute('id') == id){\n\t\t\t\t\trtv = node;\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\t\treturn rtv;\n\t},\n\n\t/**\n\t * The `getElementsByClassName` method of `Document` interface returns an array-like object\n\t * of all child elements which have **all** of the given class name(s).\n\t *\n\t * Returns an empty list if `classeNames` is an empty string or only contains HTML white space characters.\n\t *\n\t *\n\t * Warning: This is a live LiveNodeList.\n\t * Changes in the DOM will reflect in the array as the changes occur.\n\t * If an element selected by this array no longer qualifies for the selector,\n\t * it will automatically be removed. Be aware of this for iteration purposes.\n\t *\n\t * @param {string} classNames is a string representing the class name(s) to match; multiple class names are separated by (ASCII-)whitespace\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName\n\t * @see https://dom.spec.whatwg.org/#concept-getelementsbyclassname\n\t */\n\tgetElementsByClassName: function(classNames) {\n\t\tvar classNamesSet = toOrderedSet(classNames)\n\t\treturn new LiveNodeList(this, function(base) {\n\t\t\tvar ls = [];\n\t\t\tif (classNamesSet.length > 0) {\n\t\t\t\t_visitNode(base.documentElement, function(node) {\n\t\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE) {\n\t\t\t\t\t\tvar nodeClassNames = node.getAttribute('class')\n\t\t\t\t\t\t// can be null if the attribute does not exist\n\t\t\t\t\t\tif (nodeClassNames) {\n\t\t\t\t\t\t\t// before splitting and iterating just compare them for the most common case\n\t\t\t\t\t\t\tvar matches = classNames === nodeClassNames;\n\t\t\t\t\t\t\tif (!matches) {\n\t\t\t\t\t\t\t\tvar nodeClassNamesSet = toOrderedSet(nodeClassNames)\n\t\t\t\t\t\t\t\tmatches = classNamesSet.every(arrayIncludes(nodeClassNamesSet))\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tif(matches) {\n\t\t\t\t\t\t\t\tls.push(node);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t}\n\t\t\treturn ls;\n\t\t});\n\t},\n\n\t//document factory method:\n\tcreateElement :\tfunction(tagName){\n\t\tvar node = new Element();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = tagName;\n\t\tnode.tagName = tagName;\n\t\tnode.localName = tagName;\n\t\tnode.childNodes = new NodeList();\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\tcreateDocumentFragment :\tfunction(){\n\t\tvar node = new DocumentFragment();\n\t\tnode.ownerDocument = this;\n\t\tnode.childNodes = new NodeList();\n\t\treturn node;\n\t},\n\tcreateTextNode :\tfunction(data){\n\t\tvar node = new Text();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateComment :\tfunction(data){\n\t\tvar node = new Comment();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateCDATASection :\tfunction(data){\n\t\tvar node = new CDATASection();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateProcessingInstruction :\tfunction(target,data){\n\t\tvar node = new ProcessingInstruction();\n\t\tnode.ownerDocument = this;\n\t\tnode.tagName = node.nodeName = node.target = target;\n\t\tnode.nodeValue = node.data = data;\n\t\treturn node;\n\t},\n\tcreateAttribute :\tfunction(name){\n\t\tvar node = new Attr();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.name = name;\n\t\tnode.nodeName\t= name;\n\t\tnode.localName = name;\n\t\tnode.specified = true;\n\t\treturn node;\n\t},\n\tcreateEntityReference :\tfunction(name){\n\t\tvar node = new EntityReference();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.nodeName\t= name;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateElementNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Element();\n\t\tvar pl = qualifiedName.split(':');\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tnode.childNodes = new NodeList();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.tagName = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateAttributeNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Attr();\n\t\tvar pl = qualifiedName.split(':');\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.name = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tnode.specified = true;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\treturn node;\n\t}\n};\n_extends(Document,Node);\n\n\nfunction Element() {\n\tthis._nsMap = {};\n};\nElement.prototype = {\n\tnodeType : ELEMENT_NODE,\n\thasAttribute : function(name){\n\t\treturn this.getAttributeNode(name)!=null;\n\t},\n\tgetAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name);\n\t\treturn attr && attr.value || '';\n\t},\n\tgetAttributeNode : function(name){\n\t\treturn this.attributes.getNamedItem(name);\n\t},\n\tsetAttribute : function(name, value){\n\t\tvar attr = this.ownerDocument.createAttribute(name);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tremoveAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name)\n\t\tattr && this.removeAttributeNode(attr);\n\t},\n\n\t//four real opeartion method\n\tappendChild:function(newChild){\n\t\tif(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\t\treturn this.insertBefore(newChild,null);\n\t\t}else{\n\t\t\treturn _appendSingleChild(this,newChild);\n\t\t}\n\t},\n\tsetAttributeNode : function(newAttr){\n\t\treturn this.attributes.setNamedItem(newAttr);\n\t},\n\tsetAttributeNodeNS : function(newAttr){\n\t\treturn this.attributes.setNamedItemNS(newAttr);\n\t},\n\tremoveAttributeNode : function(oldAttr){\n\t\t//console.log(this == oldAttr.ownerElement)\n\t\treturn this.attributes.removeNamedItem(oldAttr.nodeName);\n\t},\n\t//get real attribute name,and remove it by removeAttributeNode\n\tremoveAttributeNS : function(namespaceURI, localName){\n\t\tvar old = this.getAttributeNodeNS(namespaceURI, localName);\n\t\told && this.removeAttributeNode(old);\n\t},\n\n\thasAttributeNS : function(namespaceURI, localName){\n\t\treturn this.getAttributeNodeNS(namespaceURI, localName)!=null;\n\t},\n\tgetAttributeNS : function(namespaceURI, localName){\n\t\tvar attr = this.getAttributeNodeNS(namespaceURI, localName);\n\t\treturn attr && attr.value || '';\n\t},\n\tsetAttributeNS : function(namespaceURI, qualifiedName, value){\n\t\tvar attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tgetAttributeNodeNS : function(namespaceURI, localName){\n\t\treturn this.attributes.getNamedItemNS(namespaceURI, localName);\n\t},\n\n\tgetElementsByTagName : function(tagName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\t\t});\n\t},\n\tgetElementsByTagNameNS : function(namespaceURI, localName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\n\t\t});\n\t}\n};\nDocument.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;\nDocument.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;\n\n\n_extends(Element,Node);\nfunction Attr() {\n};\nAttr.prototype.nodeType = ATTRIBUTE_NODE;\n_extends(Attr,Node);\n\n\nfunction CharacterData() {\n};\nCharacterData.prototype = {\n\tdata : '',\n\tsubstringData : function(offset, count) {\n\t\treturn this.data.substring(offset, offset+count);\n\t},\n\tappendData: function(text) {\n\t\ttext = this.data+text;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t},\n\tinsertData: function(offset,text) {\n\t\tthis.replaceData(offset,0,text);\n\n\t},\n\tappendChild:function(newChild){\n\t\tthrow new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])\n\t},\n\tdeleteData: function(offset, count) {\n\t\tthis.replaceData(offset,count,\"\");\n\t},\n\treplaceData: function(offset, count, text) {\n\t\tvar start = this.data.substring(0,offset);\n\t\tvar end = this.data.substring(offset+count);\n\t\ttext = start + text + end;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t}\n}\n_extends(CharacterData,Node);\nfunction Text() {\n};\nText.prototype = {\n\tnodeName : \"#text\",\n\tnodeType : TEXT_NODE,\n\tsplitText : function(offset) {\n\t\tvar text = this.data;\n\t\tvar newText = text.substring(offset);\n\t\ttext = text.substring(0, offset);\n\t\tthis.data = this.nodeValue = text;\n\t\tthis.length = text.length;\n\t\tvar newNode = this.ownerDocument.createTextNode(newText);\n\t\tif(this.parentNode){\n\t\t\tthis.parentNode.insertBefore(newNode, this.nextSibling);\n\t\t}\n\t\treturn newNode;\n\t}\n}\n_extends(Text,CharacterData);\nfunction Comment() {\n};\nComment.prototype = {\n\tnodeName : \"#comment\",\n\tnodeType : COMMENT_NODE\n}\n_extends(Comment,CharacterData);\n\nfunction CDATASection() {\n};\nCDATASection.prototype = {\n\tnodeName : \"#cdata-section\",\n\tnodeType : CDATA_SECTION_NODE\n}\n_extends(CDATASection,CharacterData);\n\n\nfunction DocumentType() {\n};\nDocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;\n_extends(DocumentType,Node);\n\nfunction Notation() {\n};\nNotation.prototype.nodeType = NOTATION_NODE;\n_extends(Notation,Node);\n\nfunction Entity() {\n};\nEntity.prototype.nodeType = ENTITY_NODE;\n_extends(Entity,Node);\n\nfunction EntityReference() {\n};\nEntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;\n_extends(EntityReference,Node);\n\nfunction DocumentFragment() {\n};\nDocumentFragment.prototype.nodeName =\t\"#document-fragment\";\nDocumentFragment.prototype.nodeType =\tDOCUMENT_FRAGMENT_NODE;\n_extends(DocumentFragment,Node);\n\n\nfunction ProcessingInstruction() {\n}\nProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;\n_extends(ProcessingInstruction,Node);\nfunction XMLSerializer(){}\nXMLSerializer.prototype.serializeToString = function(node,isHtml,nodeFilter){\n\treturn nodeSerializeToString.call(node,isHtml,nodeFilter);\n}\nNode.prototype.toString = nodeSerializeToString;\nfunction nodeSerializeToString(isHtml,nodeFilter){\n\tvar buf = [];\n\tvar refNode = this.nodeType == 9 && this.documentElement || this;\n\tvar prefix = refNode.prefix;\n\tvar uri = refNode.namespaceURI;\n\n\tif(uri && prefix == null){\n\t\t//console.log(prefix)\n\t\tvar prefix = refNode.lookupPrefix(uri);\n\t\tif(prefix == null){\n\t\t\t//isHTML = true;\n\t\t\tvar visibleNamespaces=[\n\t\t\t{namespace:uri,prefix:null}\n\t\t\t//{namespace:uri,prefix:''}\n\t\t\t]\n\t\t}\n\t}\n\tserializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);\n\t//console.log('###',this.nodeType,uri,prefix,buf.join(''))\n\treturn buf.join('');\n}\n\nfunction needNamespaceDefine(node, isHTML, visibleNamespaces) {\n\tvar prefix = node.prefix || '';\n\tvar uri = node.namespaceURI;\n\t// According to [Namespaces in XML 1.0](https://www.w3.org/TR/REC-xml-names/#ns-using) ,\n\t// and more specifically https://www.w3.org/TR/REC-xml-names/#nsc-NoPrefixUndecl :\n\t// > In a namespace declaration for a prefix [...], the attribute value MUST NOT be empty.\n\t// in a similar manner [Namespaces in XML 1.1](https://www.w3.org/TR/xml-names11/#ns-using)\n\t// and more specifically https://www.w3.org/TR/xml-names11/#nsc-NSDeclared :\n\t// > [...] Furthermore, the attribute value [...] must not be an empty string.\n\t// so serializing empty namespace value like xmlns:ds=\"\" would produce an invalid XML document.\n\tif (!uri) {\n\t\treturn false;\n\t}\n\tif (prefix === \"xml\" && uri === NAMESPACE.XML || uri === NAMESPACE.XMLNS) {\n\t\treturn false;\n\t}\n\n\tvar i = visibleNamespaces.length\n\twhile (i--) {\n\t\tvar ns = visibleNamespaces[i];\n\t\t// get namespace prefix\n\t\tif (ns.prefix === prefix) {\n\t\t\treturn ns.namespace !== uri;\n\t\t}\n\t}\n\treturn true;\n}\n/**\n * Well-formed constraint: No < in Attribute Values\n * > The replacement text of any entity referred to directly or indirectly\n * > in an attribute value must not contain a <.\n * @see https://www.w3.org/TR/xml11/#CleanAttrVals\n * @see https://www.w3.org/TR/xml11/#NT-AttValue\n *\n * Literal whitespace other than space that appear in attribute values\n * are serialized as their entity references, so they will be preserved.\n * (In contrast to whitespace literals in the input which are normalized to spaces)\n * @see https://www.w3.org/TR/xml11/#AVNormalize\n * @see https://w3c.github.io/DOM-Parsing/#serializing-an-element-s-attributes\n */\nfunction addSerializedAttribute(buf, qualifiedName, value) {\n\tbuf.push(' ', qualifiedName, '=\"', value.replace(/[<>&\"\\t\\n\\r]/g, _xmlEncoder), '\"')\n}\n\nfunction serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){\n\tif (!visibleNamespaces) {\n\t\tvisibleNamespaces = [];\n\t}\n\n\tif(nodeFilter){\n\t\tnode = nodeFilter(node);\n\t\tif(node){\n\t\t\tif(typeof node == 'string'){\n\t\t\t\tbuf.push(node);\n\t\t\t\treturn;\n\t\t\t}\n\t\t}else{\n\t\t\treturn;\n\t\t}\n\t\t//buf.sort.apply(attrs, attributeSorter);\n\t}\n\n\tswitch(node.nodeType){\n\tcase ELEMENT_NODE:\n\t\tvar attrs = node.attributes;\n\t\tvar len = attrs.length;\n\t\tvar child = node.firstChild;\n\t\tvar nodeName = node.tagName;\n\n\t\tisHTML = NAMESPACE.isHTML(node.namespaceURI) || isHTML\n\n\t\tvar prefixedNodeName = nodeName\n\t\tif (!isHTML && !node.prefix && node.namespaceURI) {\n\t\t\tvar defaultNS\n\t\t\t// lookup current default ns from `xmlns` attribute\n\t\t\tfor (var ai = 0; ai < attrs.length; ai++) {\n\t\t\t\tif (attrs.item(ai).name === 'xmlns') {\n\t\t\t\t\tdefaultNS = attrs.item(ai).value\n\t\t\t\t\tbreak\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!defaultNS) {\n\t\t\t\t// lookup current default ns in visibleNamespaces\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.prefix === '' && namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tdefaultNS = namespace.namespace\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (defaultNS !== node.namespaceURI) {\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tif (namespace.prefix) {\n\t\t\t\t\t\t\tprefixedNodeName = namespace.prefix + ':' + nodeName\n\t\t\t\t\t\t}\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tbuf.push('<', prefixedNodeName);\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\t// add namespaces for attributes\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (attr.prefix == 'xmlns') {\n\t\t\t\tvisibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });\n\t\t\t}else if(attr.nodeName == 'xmlns'){\n\t\t\t\tvisibleNamespaces.push({ prefix: '', namespace: attr.value });\n\t\t\t}\n\t\t}\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {\n\t\t\t\tvar prefix = attr.prefix||'';\n\t\t\t\tvar uri = attr.namespaceURI;\n\t\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t\t}\n\t\t\tserializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);\n\t\t}\n\n\t\t// add namespace for current node\n\t\tif (nodeName === prefixedNodeName && needNamespaceDefine(node, isHTML, visibleNamespaces)) {\n\t\t\tvar prefix = node.prefix||'';\n\t\t\tvar uri = node.namespaceURI;\n\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t}\n\n\t\tif(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){\n\t\t\tbuf.push('>');\n\t\t\t//if is cdata child node\n\t\t\tif(isHTML && /^script$/i.test(nodeName)){\n\t\t\t\twhile(child){\n\t\t\t\t\tif(child.data){\n\t\t\t\t\t\tbuf.push(child.data);\n\t\t\t\t\t}else{\n\t\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\t}\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}else\n\t\t\t{\n\t\t\t\twhile(child){\n\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}\n\t\t\tbuf.push('</',prefixedNodeName,'>');\n\t\t}else{\n\t\t\tbuf.push('/>');\n\t\t}\n\t\t// remove added visible namespaces\n\t\t//visibleNamespaces.length = startVisibleNamespaces;\n\t\treturn;\n\tcase DOCUMENT_NODE:\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t\treturn;\n\tcase ATTRIBUTE_NODE:\n\t\treturn addSerializedAttribute(buf, node.name, node.value);\n\tcase TEXT_NODE:\n\t\t/**\n\t\t * The ampersand character (&) and the left angle bracket (<) must not appear in their literal form,\n\t\t * except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.\n\t\t * If they are needed elsewhere, they must be escaped using either numeric character references or the strings\n\t\t * `&amp;` and `&lt;` respectively.\n\t\t * The right angle bracket (>) may be represented using the string \" &gt; \", and must, for compatibility,\n\t\t * be escaped using either `&gt;` or a character reference when it appears in the string `]]>` in content,\n\t\t * when that string is not marking the end of a CDATA section.\n\t\t *\n\t\t * In the content of elements, character data is any string of characters\n\t\t * which does not contain the start-delimiter of any markup\n\t\t * and does not include the CDATA-section-close delimiter, `]]>`.\n\t\t *\n\t\t * @see https://www.w3.org/TR/xml/#NT-CharData\n\t\t * @see https://w3c.github.io/DOM-Parsing/#xml-serializing-a-text-node\n\t\t */\n\t\treturn buf.push(node.data\n\t\t\t.replace(/[<&>]/g,_xmlEncoder)\n\t\t);\n\tcase CDATA_SECTION_NODE:\n\t\treturn buf.push( '<![CDATA[',node.data,']]>');\n\tcase COMMENT_NODE:\n\t\treturn buf.push( \"<!--\",node.data,\"-->\");\n\tcase DOCUMENT_TYPE_NODE:\n\t\tvar pubid = node.publicId;\n\t\tvar sysid = node.systemId;\n\t\tbuf.push('<!DOCTYPE ',node.name);\n\t\tif(pubid){\n\t\t\tbuf.push(' PUBLIC ', pubid);\n\t\t\tif (sysid && sysid!='.') {\n\t\t\t\tbuf.push(' ', sysid);\n\t\t\t}\n\t\t\tbuf.push('>');\n\t\t}else if(sysid && sysid!='.'){\n\t\t\tbuf.push(' SYSTEM ', sysid, '>');\n\t\t}else{\n\t\t\tvar sub = node.internalSubset;\n\t\t\tif(sub){\n\t\t\t\tbuf.push(\" [\",sub,\"]\");\n\t\t\t}\n\t\t\tbuf.push(\">\");\n\t\t}\n\t\treturn;\n\tcase PROCESSING_INSTRUCTION_NODE:\n\t\treturn buf.push( \"<?\",node.target,\" \",node.data,\"?>\");\n\tcase ENTITY_REFERENCE_NODE:\n\t\treturn buf.push( '&',node.nodeName,';');\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE:\n\tdefault:\n\t\tbuf.push('??',node.nodeName);\n\t}\n}\nfunction importNode(doc,node,deep){\n\tvar node2;\n\tswitch (node.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tnode2 = node.cloneNode(false);\n\t\tnode2.ownerDocument = doc;\n\t\t//var attrs = node2.attributes;\n\t\t//var len = attrs.length;\n\t\t//for(var i=0;i<len;i++){\n\t\t\t//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));\n\t\t//}\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tbreak;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t\tbreak;\n\t//case ENTITY_REFERENCE_NODE:\n\t//case PROCESSING_INSTRUCTION_NODE:\n\t////case TEXT_NODE:\n\t//case CDATA_SECTION_NODE:\n\t//case COMMENT_NODE:\n\t//\tdeep = false;\n\t//\tbreak;\n\t//case DOCUMENT_NODE:\n\t//case DOCUMENT_TYPE_NODE:\n\t//cannot be imported.\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE：\n\t//can not hit in level3\n\t//default:throw e;\n\t}\n\tif(!node2){\n\t\tnode2 = node.cloneNode(false);//false\n\t}\n\tnode2.ownerDocument = doc;\n\tnode2.parentNode = null;\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(importNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n//\n//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,\n//\t\t\t\t\tattributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};\nfunction cloneNode(doc,node,deep){\n\tvar node2 = new node.constructor();\n\tfor (var n in node) {\n\t\tif (Object.prototype.hasOwnProperty.call(node, n)) {\n\t\t\tvar v = node[n];\n\t\t\tif (typeof v != \"object\") {\n\t\t\t\tif (v != node2[n]) {\n\t\t\t\t\tnode2[n] = v;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\tif(node.childNodes){\n\t\tnode2.childNodes = new NodeList();\n\t}\n\tnode2.ownerDocument = doc;\n\tswitch (node2.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tvar attrs\t= node.attributes;\n\t\tvar attrs2\t= node2.attributes = new NamedNodeMap();\n\t\tvar len = attrs.length\n\t\tattrs2._ownerElement = node2;\n\t\tfor(var i=0;i<len;i++){\n\t\t\tnode2.setAttributeNode(cloneNode(doc,attrs.item(i),true));\n\t\t}\n\t\tbreak;;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t}\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(cloneNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n\nfunction __set__(object,key,value){\n\tobject[key] = value\n}\n//do dynamic\ntry{\n\tif(Object.defineProperty){\n\t\tObject.defineProperty(LiveNodeList.prototype,'length',{\n\t\t\tget:function(){\n\t\t\t\t_updateLiveList(this);\n\t\t\t\treturn this.$$length;\n\t\t\t}\n\t\t});\n\n\t\tObject.defineProperty(Node.prototype,'textContent',{\n\t\t\tget:function(){\n\t\t\t\treturn getTextContent(this);\n\t\t\t},\n\n\t\t\tset:function(data){\n\t\t\t\tswitch(this.nodeType){\n\t\t\t\tcase ELEMENT_NODE:\n\t\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\t\twhile(this.firstChild){\n\t\t\t\t\t\tthis.removeChild(this.firstChild);\n\t\t\t\t\t}\n\t\t\t\t\tif(data || String(data)){\n\t\t\t\t\t\tthis.appendChild(this.ownerDocument.createTextNode(data));\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\t\t\t\t\tthis.data = data;\n\t\t\t\t\tthis.value = data;\n\t\t\t\t\tthis.nodeValue = data;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\n\t\tfunction getTextContent(node){\n\t\t\tswitch(node.nodeType){\n\t\t\tcase ELEMENT_NODE:\n\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\tvar buf = [];\n\t\t\t\tnode = node.firstChild;\n\t\t\t\twhile(node){\n\t\t\t\t\tif(node.nodeType!==7 && node.nodeType !==8){\n\t\t\t\t\t\tbuf.push(getTextContent(node));\n\t\t\t\t\t}\n\t\t\t\t\tnode = node.nextSibling;\n\t\t\t\t}\n\t\t\t\treturn buf.join('');\n\t\t\tdefault:\n\t\t\t\treturn node.nodeValue;\n\t\t\t}\n\t\t}\n\n\t\t__set__ = function(object,key,value){\n\t\t\t//console.log(value)\n\t\t\tobject['$$'+key] = value\n\t\t}\n\t}\n}catch(e){//ie8\n}\n\n//if(typeof require == 'function'){\n\texports.DocumentType = DocumentType;\n\texports.DOMException = DOMException;\n\texports.DOMImplementation = DOMImplementation;\n\texports.Element = Element;\n\texports.Node = Node;\n\texports.NodeList = NodeList;\n\texports.XMLSerializer = XMLSerializer;\n//}\n","'use strict';\nvar toString = require('../internals/to-string');\n\nmodule.exports = function (argument, $default) {\n  return argument === undefined ? arguments.length < 2 ? '' : $default : toString(argument);\n};\n","'use strict';\nvar getBuiltIn = require('../internals/get-built-in');\nvar hasOwn = require('../internals/has-own-property');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar isPrototypeOf = require('../internals/object-is-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar proxyAccessor = require('../internals/proxy-accessor');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar normalizeStringArgument = require('../internals/normalize-string-argument');\nvar installErrorCause = require('../internals/install-error-cause');\nvar installErrorStack = require('../internals/error-stack-install');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar IS_PURE = require('../internals/is-pure');\n\nmodule.exports = function (FULL_NAME, wrapper, FORCED, IS_AGGREGATE_ERROR) {\n  var STACK_TRACE_LIMIT = 'stackTraceLimit';\n  var OPTIONS_POSITION = IS_AGGREGATE_ERROR ? 2 : 1;\n  var path = FULL_NAME.split('.');\n  var ERROR_NAME = path[path.length - 1];\n  var OriginalError = getBuiltIn.apply(null, path);\n\n  if (!OriginalError) return;\n\n  var OriginalErrorPrototype = OriginalError.prototype;\n\n  // V8 9.3- bug https://bugs.chromium.org/p/v8/issues/detail?id=12006\n  if (!IS_PURE && hasOwn(OriginalErrorPrototype, 'cause')) delete OriginalErrorPrototype.cause;\n\n  if (!FORCED) return OriginalError;\n\n  var BaseError = getBuiltIn('Error');\n\n  var WrappedError = wrapper(function (a, b) {\n    var message = normalizeStringArgument(IS_AGGREGATE_ERROR ? b : a, undefined);\n    var result = IS_AGGREGATE_ERROR ? new OriginalError(a) : new OriginalError();\n    if (message !== undefined) createNonEnumerableProperty(result, 'message', message);\n    installErrorStack(result, WrappedError, result.stack, 2);\n    if (this && isPrototypeOf(OriginalErrorPrototype, this)) inheritIfRequired(result, this, WrappedError);\n    if (arguments.length > OPTIONS_POSITION) installErrorCause(result, arguments[OPTIONS_POSITION]);\n    return result;\n  });\n\n  WrappedError.prototype = OriginalErrorPrototype;\n\n  if (ERROR_NAME !== 'Error') {\n    if (setPrototypeOf) setPrototypeOf(WrappedError, BaseError);\n    else copyConstructorProperties(WrappedError, BaseError, { name: true });\n  } else if (DESCRIPTORS && STACK_TRACE_LIMIT in OriginalError) {\n    proxyAccessor(WrappedError, OriginalError, STACK_TRACE_LIMIT);\n    proxyAccessor(WrappedError, OriginalError, 'prepareStackTrace');\n  }\n\n  copyConstructorProperties(WrappedError, OriginalError);\n\n  if (!IS_PURE) try {\n    // Safari 13- bug: WebAssembly errors does not have a proper `.name`\n    if (OriginalErrorPrototype.name !== ERROR_NAME) {\n      createNonEnumerableProperty(OriginalErrorPrototype, 'name', ERROR_NAME);\n    }\n    OriginalErrorPrototype.constructor = WrappedError;\n  } catch (error) { /* empty */ }\n\n  return WrappedError;\n};\n","var setPrototypeOf = require(\"./setPrototypeOf.js\");\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  Object.defineProperty(subClass, \"prototype\", {\n    writable: false\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}\nmodule.exports = _inherits, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;","var topLevel = typeof global !== 'undefined' ? global :\n    typeof window !== 'undefined' ? window : {}\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n    doccy = document;\n} else {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n    if (!doccy) {\n        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n    }\n}\n\nmodule.exports = doccy;\n","/**\n * @license\n * Video.js 7.21.5 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/main/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>\n */\n\nimport window$1 from 'global/window';\nimport document from 'global/document';\nimport _extends from '@babel/runtime/helpers/extends';\nimport keycode from 'keycode';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport safeParseTuple from 'safe-json-parse/tuple';\nimport XHR from '@videojs/xhr';\nimport vtt from 'videojs-vtt.js';\nimport _construct from '@babel/runtime/helpers/construct';\nimport _inherits from '@babel/runtime/helpers/inherits';\nimport _resolveUrl from '@videojs/vhs-utils/es/resolve-url.js';\nimport { Parser } from 'm3u8-parser';\nimport { browserSupportsCodec, DEFAULT_VIDEO_CODEC, DEFAULT_AUDIO_CODEC, muxerSupportsCodec, parseCodecs, translateLegacyCodec, codecsFromDefault, getMimeForCodec, isAudioCodec } from '@videojs/vhs-utils/es/codecs.js';\nimport { simpleTypeFromSourceType } from '@videojs/vhs-utils/es/media-types.js';\nimport { isArrayBufferView, concatTypedArrays, stringToBytes, toUint8 } from '@videojs/vhs-utils/es/byte-helpers';\nimport { generateSidxKey, parseUTCTiming, parse, addSidxSegmentsToPlaylist } from 'mpd-parser';\nimport parseSidx from 'mux.js/lib/tools/parse-sidx';\nimport { getId3Offset } from '@videojs/vhs-utils/es/id3-helpers';\nimport { detectContainerForBytes, isLikelyFmp4MediaSegment } from '@videojs/vhs-utils/es/containers';\nimport { ONE_SECOND_IN_TS } from 'mux.js/lib/utils/clock';\nimport _wrapNativeSuper from '@babel/runtime/helpers/wrapNativeSuper';\n\nvar version$5 = \"7.21.5\";\n\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n *\n * @private\n */\nvar hooks_ = {};\n/**\n * Get a list of hooks for a specific lifecycle\n *\n * @param  {string} type\n *         the lifecyle to get hooks from\n *\n * @param  {Function|Function[]} [fn]\n *         Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\n\nvar hooks = function hooks(type, fn) {\n  hooks_[type] = hooks_[type] || [];\n\n  if (fn) {\n    hooks_[type] = hooks_[type].concat(fn);\n  }\n\n  return hooks_[type];\n};\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hook = function hook(type, fn) {\n  hooks(type, fn);\n};\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param  {string} type\n *         the lifecycle that the function hooked to\n *\n * @param  {Function} fn\n *         The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\n\n\nvar removeHook = function removeHook(type, fn) {\n  var index = hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  hooks_[type] = hooks_[type].slice();\n  hooks_[type].splice(index, 1);\n  return true;\n};\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hookOnce = function hookOnce(type, fn) {\n  hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      removeHook(type, wrapper);\n      return original.apply(void 0, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\n\nvar FullscreenApi = {\n  prefixed: true\n}; // browser API methods\n\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'], // WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen'], // Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror', '-moz-full-screen'], // Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError', '-ms-fullscreen']];\nvar specApi = apiMap[0];\nvar browserApi; // determine the supported set of functions\n\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n} // map the browser API names to the spec API names\n\n\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n\n  FullscreenApi.prefixed = browserApi[0] !== specApi[0];\n}\n\n/**\n * @file create-logger.js\n * @module create-logger\n */\n\nvar history = [];\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\n\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp(\"^(\" + lvl + \")$\");\n\n    if (type !== 'log') {\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    } // Add console prefix after adding to history.\n\n\n    args.unshift(name + ':'); // Add a clone of the args at this point to history.\n\n    if (history) {\n      history.push([].concat(args)); // only store 1000 history entries\n\n      var splice = history.length - 1000;\n      history.splice(0, splice > 0 ? splice : 0);\n    } // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n\n\n    if (!window$1.console) {\n      return;\n    } // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n\n\n    var fn = window$1.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window$1.console.info || window$1.console.log;\n    } // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n\n\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    fn[Array.isArray(args) ? 'apply' : 'call'](window$1.console, args);\n  };\n};\n\nfunction createLogger$1(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info'; // the curried logByType bound to the specific log and history\n\n  var logByType;\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n\n  var log = function log() {\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args);\n  }; // This is the logByType helper that the logging methods below use\n\n\n  logByType = LogByTypeFactory(name, log);\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n\n  log.createLogger = function (subname) {\n    return createLogger$1(name + ': ' + subname);\n  };\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n\n\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error(\"\\\"\" + lvl + \"\\\" in not a valid log level\");\n      }\n\n      level = lvl;\n    }\n\n    return level;\n  };\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n\n\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n\n\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp(\".*\" + fname + \".*\").test(historyItem[0]);\n    });\n  };\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n\n\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n\n\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n\n\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n\n\n  log.error = function () {\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n\n\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n\n\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n\n/**\n * @file log.js\n * @module log\n */\nvar log$1 = createLogger$1('VIDEOJS');\nvar createLogger = log$1.createLogger;\n\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\nvar toString = Object.prototype.toString;\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\n\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\n\n\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\n\nfunction reduce(object, fn, initial) {\n  if (initial === void 0) {\n    initial = 0;\n  }\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\n\nfunction assign(target) {\n  for (var _len = arguments.length, sources = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return _extends.apply(void 0, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n  return target;\n}\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isObject(value) {\n  return !!value && typeof value === 'object';\n}\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n\n/**\n * @file computed-style.js\n * @module computed-style\n */\n/**\n * A safe getComputedStyle.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a\n * null-check to make sure that the player doesn't break in these cases.\n *\n * @function\n * @param    {Element} el\n *           The element you want the computed style of\n *\n * @param    {string} prop\n *           The property name you want\n *\n * @see      https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n */\n\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window$1.getComputedStyle === 'function') {\n    var computedStyleValue;\n\n    try {\n      computedStyleValue = window$1.getComputedStyle(el);\n    } catch (e) {\n      return '';\n    }\n\n    return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';\n  }\n\n  return '';\n}\n\n/**\n * @file browser.js\n * @module browser\n */\nvar USER_AGENT = window$1.navigator && window$1.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n/**\n * Whether or not this device is an iPod.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\n/**\n * The detected iOS version - or `null`.\n *\n * @static\n * @const\n * @type {string|null}\n */\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is an Android device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\n/**\n * The detected Android version - or `null`.\n *\n * @static\n * @const\n * @type {number|string|null}\n */\n\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is a native Android browser.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n/**\n * Whether or not this is Mozilla Firefox.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\n/**\n * Whether or not this is Microsoft Edge.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_EDGE = /Edg/i.test(USER_AGENT);\n/**\n * Whether or not this is Google Chrome.\n *\n * This will also be `true` for Chrome on iOS, which will have different support\n * as it is actually Safari under the hood.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\n/**\n * The detected Google Chrome version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n\n  return null;\n}();\n/**\n * The detected Internet Explorer version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n/**\n * Whether or not this is desktop Safari.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\n/**\n * Whether or not this is a Windows machine.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_WINDOWS = /Windows/i.test(USER_AGENT);\n/**\n * Whether or not this device is touch-enabled.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar TOUCH_ENABLED = Boolean(isReal() && ('ontouchstart' in window$1 || window$1.navigator.maxTouchPoints || window$1.DocumentTouch && window$1.document instanceof window$1.DocumentTouch));\n/**\n * Whether or not this device is an iPad.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPAD = /iPad/i.test(USER_AGENT) || IS_SAFARI && TOUCH_ENABLED && !/iPhone/i.test(USER_AGENT);\n/**\n * Whether or not this device is an iPhone.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\n\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\n/**\n * Whether or not this is an iOS device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n/**\n * Whether or not this is any flavor of Safari - including iOS.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\nvar browser = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  IS_IPOD: IS_IPOD,\n  IOS_VERSION: IOS_VERSION,\n  IS_ANDROID: IS_ANDROID,\n  ANDROID_VERSION: ANDROID_VERSION,\n  IS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n  IS_FIREFOX: IS_FIREFOX,\n  IS_EDGE: IS_EDGE,\n  IS_CHROME: IS_CHROME,\n  CHROME_VERSION: CHROME_VERSION,\n  IE_VERSION: IE_VERSION,\n  IS_SAFARI: IS_SAFARI,\n  IS_WINDOWS: IS_WINDOWS,\n  TOUCH_ENABLED: TOUCH_ENABLED,\n  IS_IPAD: IS_IPAD,\n  IS_IPHONE: IS_IPHONE,\n  IS_IOS: IS_IOS,\n  IS_ANY_SAFARI: IS_ANY_SAFARI\n});\n\n/**\n * @file dom.js\n * @module dom\n */\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @private\n * @param  {string} str\n *         The string to check\n *\n * @return {boolean}\n *         Will be `true` if the string is non-blank, `false` otherwise.\n *\n */\n\nfunction isNonBlankString(str) {\n  // we use str.trim as it will trim any whitespace characters\n  // from the front or back of non-whitespace characters. aka\n  // Any string that contains non-whitespace characters will\n  // still contain them after `trim` but whitespace only strings\n  // will have a length of 0, failing this check.\n  return typeof str === 'string' && Boolean(str.trim());\n}\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @private\n * @param  {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n */\n\n\nfunction throwIfWhitespace(str) {\n  // str.indexOf instead of regex because str.indexOf is faster performance wise.\n  if (str.indexOf(' ') >= 0) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @private\n * @param  {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\n\n\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n/**\n * Whether the current DOM interface appears to be real (i.e. not simulated).\n *\n * @return {boolean}\n *         Will be `true` if the DOM appears to be real, `false` otherwise.\n */\n\n\nfunction isReal() {\n  // Both document and window will never be undefined thanks to `global`.\n  return document === window$1.document;\n}\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param  {Mixed} value\n *         The value to check.\n *\n * @return {boolean}\n *         Will be `true` if the value is a DOM element, `false` otherwise.\n */\n\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *         Will be `true` if the DOM is embedded in an iframe, `false`\n *         otherwise.\n */\n\nfunction isInFrame() {\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window$1.parent !== window$1.self;\n  } catch (x) {\n    return true;\n  }\n}\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @private\n * @param   {string} method\n *          The method to create the query with.\n *\n * @return  {Function}\n *          The query method\n */\n\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n    return ctx[method] && ctx[method](selector);\n  };\n}\n/**\n * Creates an element and applies properties, attributes, and inserts content.\n *\n * @param  {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param  {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param  {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor object.\n *\n * @return {Element}\n *         The element that was created.\n */\n\n\nfunction createEl(tagName, properties, attributes, content) {\n  if (tagName === void 0) {\n    tagName = 'div';\n  }\n\n  if (properties === void 0) {\n    properties = {};\n  }\n\n  if (attributes === void 0) {\n    attributes = {};\n  }\n\n  var el = document.createElement(tagName);\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName]; // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log$1.warn('Setting attributes in the second argument of createEl()\\n' + 'has been deprecated. Use the third argument instead.\\n' + (\"createEl(type, properties, attributes). Attempting to set \" + propName + \" to \" + val + \".\"));\n      el.setAttribute(propName, val); // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else if (el[propName] !== val || propName === 'tabIndex') {\n      el[propName] = val;\n    }\n  });\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param  {Element} el\n *         The element to add text content into\n *\n * @param  {string} text\n *         The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\n\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n\n  return el;\n}\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\n\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n/**\n * Check if an element has a class name.\n *\n * @param  {Element} element\n *         Element to check\n *\n * @param  {string} classToCheck\n *         Class name to check for\n *\n * @return {boolean}\n *         Will be `true` if the element has a class, `false` otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\n\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n\n  return classRegExp(classToCheck).test(element.className);\n}\n/**\n * Add a class name to an element.\n *\n * @param  {Element} element\n *         Element to add class name to.\n *\n * @param  {string} classToAdd\n *         Class name to add.\n *\n * @return {Element}\n *         The DOM element with the added class name.\n */\n\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd); // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n/**\n * Remove a class name from an element.\n *\n * @param  {Element} element\n *         Element to remove a class name from.\n *\n * @param  {string} classToRemove\n *         Class name to remove\n *\n * @return {Element}\n *         The DOM element with class name removed.\n */\n\nfunction removeClass(element, classToRemove) {\n  // Protect in case the player gets disposed\n  if (!element) {\n    log$1.warn(\"removeClass was called with an element that doesn't exist\");\n    return null;\n  }\n\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n/**\n * The callback definition for toggleClass.\n *\n * @callback module:dom~PredicateCallback\n * @param    {Element} element\n *           The DOM element of the Component.\n *\n * @param    {string} classToToggle\n *           The `className` that wants to be toggled\n *\n * @return   {boolean|undefined}\n *           If `true` is returned, the `classToToggle` will be added to the\n *           `element`. If `false`, the `classToToggle` will be removed from\n *           the `element`. If `undefined`, the callback will be ignored.\n */\n\n/**\n * Adds or removes a class name to/from an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param  {Element} element\n *         The element to toggle a class name on.\n *\n * @param  {string} classToToggle\n *         The class that should be toggled.\n *\n * @param  {boolean|module:dom~PredicateCallback} [predicate]\n *         See the return value for {@link module:dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\n\nfunction toggleClass(element, classToToggle, predicate) {\n  // This CANNOT use `classList` internally because IE11 does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  } // If the necessary class operation matches the current state of the\n  // element, no action is required.\n\n\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\n\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n/**\n * Get an element's attribute values, as defined on the HTML tag.\n *\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute.\n *\n * @param  {Element} tag\n *         Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element. Boolean attributes will be `true` or\n *         `false`, others will be strings.\n */\n\nfunction getAttributes(tag) {\n  var obj = {}; // known boolean attributes\n  // we can check for matching boolean properties, but not all browsers\n  // and not all tags know about these attributes, so, we still want to check them manually\n\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value; // check for known booleans\n      // the matching element property will return a value for typeof\n\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n/**\n * Get the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to get the value of.\n *\n * @return {string}\n *         The value of the attribute.\n */\n\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n/**\n * Set the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to set.\n *\n * @param {string} value\n *        Value to set the attribute to.\n */\n\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n/**\n * Remove an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to remove.\n */\n\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n/**\n * Attempt to block the ability to select text.\n */\n\nfunction blockTextSelection() {\n  document.body.focus();\n\n  document.onselectstart = function () {\n    return false;\n  };\n}\n/**\n * Turn off text selection blocking.\n */\n\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain object - or `undefined` if it cannot.\n */\n\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n/**\n * Represents the position of a DOM element on the page.\n *\n * @typedef  {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left.\n *\n * @property {number} top\n *           Pixels from the top.\n */\n\n/**\n * Get the position of an element in the DOM.\n *\n * Uses `getBoundingClientRect` technique from John Resig.\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param  {Element} el\n *         Element from which to get offset.\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\n\nfunction findPosition(el) {\n  if (!el || el && !el.offsetParent) {\n    return {\n      left: 0,\n      top: 0,\n      width: 0,\n      height: 0\n    };\n  }\n\n  var width = el.offsetWidth;\n  var height = el.offsetHeight;\n  var left = 0;\n  var top = 0;\n\n  while (el.offsetParent && el !== document[FullscreenApi.fullscreenElement]) {\n    left += el.offsetLeft;\n    top += el.offsetTop;\n    el = el.offsetParent;\n  }\n\n  return {\n    left: left,\n    top: top,\n    width: width,\n    height: height\n  };\n}\n/**\n * Represents x and y coordinates for a DOM element or mouse pointer.\n *\n * @typedef  {Object} module:dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get the pointer position within an element.\n *\n * The base on the coordinates are the bottom left of the element.\n *\n * @param  {Element} el\n *         Element on which to get the pointer position on.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {module:dom~Coordinates}\n *         A coordinates object corresponding to the mouse position.\n *\n */\n\nfunction getPointerPosition(el, event) {\n  var translated = {\n    x: 0,\n    y: 0\n  };\n\n  if (IS_IOS) {\n    var item = el;\n\n    while (item && item.nodeName.toLowerCase() !== 'html') {\n      var transform = computedStyle(item, 'transform');\n\n      if (/^matrix/.test(transform)) {\n        var values = transform.slice(7, -1).split(/,\\s/).map(Number);\n        translated.x += values[4];\n        translated.y += values[5];\n      } else if (/^matrix3d/.test(transform)) {\n        var _values = transform.slice(9, -1).split(/,\\s/).map(Number);\n\n        translated.x += _values[12];\n        translated.y += _values[13];\n      }\n\n      item = item.parentNode;\n    }\n  }\n\n  var position = {};\n  var boxTarget = findPosition(event.target);\n  var box = findPosition(el);\n  var boxW = box.width;\n  var boxH = box.height;\n  var offsetY = event.offsetY - (box.top - boxTarget.top);\n  var offsetX = event.offsetX - (box.left - boxTarget.left);\n\n  if (event.changedTouches) {\n    offsetX = event.changedTouches[0].pageX - box.left;\n    offsetY = event.changedTouches[0].pageY + box.top;\n\n    if (IS_IOS) {\n      offsetX -= translated.x;\n      offsetY -= translated.y;\n    }\n  }\n\n  position.y = 1 - Math.max(0, Math.min(1, offsetY / boxH));\n  position.x = Math.max(0, Math.min(1, offsetX / boxW));\n  return position;\n}\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param  {Mixed} value\n *         Check if this value is a text node.\n *\n * @return {boolean}\n *         Will be `true` if the value is a text node, `false` otherwise.\n */\n\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n/**\n * Empties the contents of an element.\n *\n * @param  {Element} el\n *         The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\n\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n\n  return el;\n}\n/**\n * This is a mixed value that describes content to be injected into the DOM\n * via some method. It can be of the following types:\n *\n * Type       | Description\n * -----------|-------------\n * `string`   | The value will be normalized into a text node.\n * `Element`  | The value will be accepted as-is.\n * `TextNode` | The value will be accepted as-is.\n * `Array`    | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).\n * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.\n *\n * @typedef {string|Element|TextNode|Array|Function} module:dom~ContentDescriptor\n */\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but helps protect\n * from falling into the trap of simply writing to `innerHTML`, which could\n * be an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Array}\n *         All of the content that was passed in, normalized to an array of\n *         elements or text nodes.\n */\n\nfunction normalizeContent(content) {\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  } // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n\n\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n/**\n * Normalizes and appends content to an element.\n *\n * @param  {Element} el\n *         Element to append normalized content to.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\n\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with inserted normalized content.\n */\n\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n/**\n * Check if an event was a single left click.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {boolean}\n *         Will be `true` if a single left click, `false` otherwise.\n */\n\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n    return true;\n  } // `mouseup` event on a single left click has\n  // `button` and `buttons` equal to 0\n\n\n  if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n    return false;\n  }\n\n  return true;\n}\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\n\nvar $ = createQuerier('querySelector');\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none\n *         were found.\n *\n */\n\nvar $$ = createQuerier('querySelectorAll');\n\nvar Dom = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  isReal: isReal,\n  isEl: isEl,\n  isInFrame: isInFrame,\n  createEl: createEl,\n  textContent: textContent,\n  prependTo: prependTo,\n  hasClass: hasClass,\n  addClass: addClass,\n  removeClass: removeClass,\n  toggleClass: toggleClass,\n  setAttributes: setAttributes,\n  getAttributes: getAttributes,\n  getAttribute: getAttribute,\n  setAttribute: setAttribute,\n  removeAttribute: removeAttribute,\n  blockTextSelection: blockTextSelection,\n  unblockTextSelection: unblockTextSelection,\n  getBoundingClientRect: getBoundingClientRect,\n  findPosition: findPosition,\n  getPointerPosition: getPointerPosition,\n  isTextNode: isTextNode,\n  emptyEl: emptyEl,\n  normalizeContent: normalizeContent,\n  appendContent: appendContent,\n  insertContent: insertContent,\n  isSingleLeftClick: isSingleLeftClick,\n  $: $,\n  $$: $$\n});\n\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\nvar _windowLoaded = false;\nvar videojs$1;\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\n\nvar autoSetup = function autoSetup() {\n  if (videojs$1.options.autoSetup === false) {\n    return;\n  }\n\n  var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  var divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));\n  var mediaEls = vids.concat(audios, divs); // Check if any media elements exist\n\n  if (mediaEls && mediaEls.length > 0) {\n    for (var i = 0, e = mediaEls.length; i < e; i++) {\n      var mediaEl = mediaEls[i]; // Check if element exists, has getAttribute func.\n\n      if (mediaEl && mediaEl.getAttribute) {\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup'); // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs$1(mediaEl);\n          }\n        } // If getAttribute isn't defined, we need to wait for the DOM.\n\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    } // No videos were found, so keep looping unless page is finished loading.\n\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\n\n\nfunction autoSetupTimeout(wait, vjs) {\n  // Protect against breakage in non-browser environments\n  if (!isReal()) {\n    return;\n  }\n\n  if (vjs) {\n    videojs$1 = vjs;\n  }\n\n  window$1.setTimeout(autoSetup, wait);\n}\n/**\n * Used to set the internal tracking of window loaded state to true.\n *\n * @private\n */\n\n\nfunction setWindowLoaded() {\n  _windowLoaded = true;\n  window$1.removeEventListener('load', setWindowLoaded);\n}\n\nif (isReal()) {\n  if (document.readyState === 'complete') {\n    setWindowLoaded();\n  } else {\n    /**\n     * Listen for the load event on window, and set _windowLoaded to true.\n     *\n     * We use a standard event listener here to avoid incrementing the GUID\n     * before any players are created.\n     *\n     * @listens load\n     */\n    window$1.addEventListener('load', setWindowLoaded);\n  }\n}\n\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\n\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n  style.className = className;\n  return style;\n};\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\n\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n\n/**\n * @file guid.js\n * @module guid\n */\n// Default value for GUIDs. This allows us to reset the GUID counter in tests.\n//\n// The initial GUID is 3 because some users have come to rely on the first\n// default player ID ending up as `vjs_video_3`.\n//\n// See: https://github.com/videojs/video.js/pull/6216\nvar _initialGuid = 3;\n/**\n * Unique ID for an element or function\n *\n * @type {Number}\n */\n\nvar _guid = _initialGuid;\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\n\nfunction newGUID() {\n  return _guid++;\n}\n\n/**\n * @file dom-data.js\n * @module dom-data\n */\nvar FakeWeakMap;\n\nif (!window$1.WeakMap) {\n  FakeWeakMap = /*#__PURE__*/function () {\n    function FakeWeakMap() {\n      this.vdata = 'vdata' + Math.floor(window$1.performance && window$1.performance.now() || Date.now());\n      this.data = {};\n    }\n\n    var _proto = FakeWeakMap.prototype;\n\n    _proto.set = function set(key, value) {\n      var access = key[this.vdata] || newGUID();\n\n      if (!key[this.vdata]) {\n        key[this.vdata] = access;\n      }\n\n      this.data[access] = value;\n      return this;\n    };\n\n    _proto.get = function get(key) {\n      var access = key[this.vdata]; // we have data, return it\n\n      if (access) {\n        return this.data[access];\n      } // we don't have data, return nothing.\n      // return undefined explicitly as that's the contract for this method\n\n\n      log$1('We have no data for this element', key);\n      return undefined;\n    };\n\n    _proto.has = function has(key) {\n      var access = key[this.vdata];\n      return access in this.data;\n    };\n\n    _proto[\"delete\"] = function _delete(key) {\n      var access = key[this.vdata];\n\n      if (access) {\n        delete this.data[access];\n        delete key[this.vdata];\n      }\n    };\n\n    return FakeWeakMap;\n  }();\n}\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\n\n\nvar DomData = window$1.WeakMap ? new WeakMap() : new FakeWeakMap();\n\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @file events.js\n * @module events\n */\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\n\nfunction _cleanUpEvents(elem, type) {\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // Remove the events of a particular type if there are none left\n\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type]; // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n    // Remove the meta-handler from the element\n\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  } // Remove the events object if there are no types left\n\n\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  } // Finally remove the element data if there is no data left\n\n\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    DomData[\"delete\"](elem);\n  }\n}\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\n\n\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\n\n\nfunction fixEvent(event) {\n  if (event.fixed_) {\n    return event;\n  }\n\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  } // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n\n\n  if (!event || !event.isPropagationStopped || !event.isImmediatePropagationStopped) {\n    var old = event || window$1.event;\n    event = {}; // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      // Lighthouse complains if Event.path is copied\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY' && key !== 'path') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    } // The event occurred on this element\n\n\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    } // Handle which other element the event is related to\n\n\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    } // Stop the default browser action\n\n\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false; // Stop the event from bubbling\n\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse; // Stop the event from bubbling and executing other handlers\n\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse; // Handle mouse position\n\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    } // Handle key presses\n\n\n    event.which = event.charCode || event.keyCode; // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n\n    if (event.button !== null && event.button !== undefined) {\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  }\n\n  event.fixed_ = true; // Returns fixed-up instance\n\n  return event;\n}\n/**\n * Whether passive event listeners are supported\n */\n\nvar _supportsPassive;\n\nvar supportsPassive = function supportsPassive() {\n  if (typeof _supportsPassive !== 'boolean') {\n    _supportsPassive = false;\n\n    try {\n      var opts = Object.defineProperty({}, 'passive', {\n        get: function get() {\n          _supportsPassive = true;\n        }\n      });\n      window$1.addEventListener('test', null, opts);\n      window$1.removeEventListener('test', null, opts);\n    } catch (e) {// disregard\n    }\n  }\n\n  return _supportsPassive;\n};\n/**\n * Touch events Chrome expects to be passive\n */\n\n\nvar passiveEvents = ['touchstart', 'touchmove'];\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\n\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  if (!DomData.has(elem)) {\n    DomData.set(elem, {});\n  }\n\n  var data = DomData.get(elem); // We need a place to store all our handler data\n\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log$1.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (supportsPassive() && passiveEvents.indexOf(type) > -1) {\n        options = {\n          passive: true\n        };\n      }\n\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\n\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // If no events exist, nothing to unbind\n\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  } // Utility function\n\n\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n\n    _cleanUpEvents(el, t);\n  }; // Are we removing all bound events?\n\n\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n\n    return;\n  }\n\n  var handlers = data.handlers[type]; // If no handlers exist, nothing to unbind\n\n  if (!handlers) {\n    return;\n  } // If no listener was provided, remove all listeners for type\n\n\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  } // We're only removing a single handler\n\n\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         Returns the opposite of `defaultPrevented` if default was\n *         prevented. Otherwise, returns `undefined`\n */\n\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = DomData.has(elem) ? DomData.get(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument; // type = event.type || event,\n  // handler;\n  // If an event name was passed as a string, creates an event out of it\n\n  if (typeof event === 'string') {\n    event = {\n      type: event,\n      target: elem\n    };\n  } else if (!event.target) {\n    event.target = elem;\n  } // Normalizes the event properties.\n\n\n  event = fixEvent(event); // If the passed element has a dispatcher, executes the established handlers.\n\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  } // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n\n\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash); // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {\n    if (!DomData.has(event.target)) {\n      DomData.set(event.target, {});\n    }\n\n    var targetData = DomData.get(event.target); // Checks if the target has a default action for this event.\n\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true; // Executes the default action.\n\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      } // Re-enables event dispatching.\n\n\n      targetData.disabled = false;\n    }\n  } // Inform the triggerer if the default was prevented by returning false\n\n\n  return !event.defaultPrevented;\n}\n/**\n * Trigger a listener only once for an event.\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n/**\n * Trigger a listener only once and then turn if off for all\n * configured events\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction any(elem, type, fn) {\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID(); // multiple ons, but one off for everything\n\n  on(elem, type, func);\n}\n\nvar Events = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  fixEvent: fixEvent,\n  on: on,\n  off: off,\n  trigger: trigger,\n  one: one,\n  any: any\n});\n\n/**\n * @file fn.js\n * @module fn\n */\nvar UPDATE_REFRESH_INTERVAL = 30;\n/**\n * Bind (a.k.a proxy or context). A simple method for changing the context of\n * a function.\n *\n * It also stores a unique id on the function so it can be easily removed from\n * events.\n *\n * @function\n * @param    {Mixed} context\n *           The object to bind as scope.\n *\n * @param    {Function} fn\n *           The function to be bound to a scope.\n *\n * @param    {number} [uid]\n *           An optional unique ID for the function to be set\n *\n * @return   {Function}\n *           The new function that will be bound into the context given\n */\n\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  } // Create the new function that changes the context\n\n\n  var bound = fn.bind(context); // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n  return bound;\n};\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @function\n * @param    {Function} fn\n *           The function to be throttled.\n *\n * @param    {number}   wait\n *           The number of milliseconds by which to throttle.\n *\n * @return   {Function}\n */\n\nvar throttle = function throttle(fn, wait) {\n  var last = window$1.performance.now();\n\n  var throttled = function throttled() {\n    var now = window$1.performance.now();\n\n    if (now - last >= wait) {\n      fn.apply(void 0, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @function\n * @param    {Function} func\n *           The function to wrap with debounce behavior.\n *\n * @param    {number} wait\n *           The number of milliseconds to wait after the last invocation.\n *\n * @param    {boolean} [immediate]\n *           Whether or not to invoke the function immediately upon creation.\n *\n * @param    {Object} [context=window]\n *           The \"context\" in which the debounced function should debounce. For\n *           example, if this function should be tied to a Video.js player,\n *           the player can be passed here. Alternatively, defaults to the\n *           global `window` object.\n *\n * @return   {Function}\n *           A debounced function.\n */\n\nvar debounce = function debounce(func, wait, immediate, context) {\n  if (context === void 0) {\n    context = window$1;\n  }\n\n  var timeout;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n  /* eslint-disable consistent-this */\n\n\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n\n  debounced.cancel = cancel;\n  return debounced;\n};\n\n/**\n * @file src/js/event-target.js\n */\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\n\nvar EventTarget$2 = function EventTarget() {};\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\n\n\nEventTarget$2.prototype.allowedEvents_ = {};\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\n\nEventTarget$2.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\n\n\nEventTarget$2.prototype.addEventListener = EventTarget$2.prototype.on;\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\n\nEventTarget$2.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\n\n\nEventTarget$2.prototype.removeEventListener = EventTarget$2.prototype.off;\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\n\nEventTarget$2.prototype.one = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\nEventTarget$2.prototype.any = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  any(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\n\n\nEventTarget$2.prototype.trigger = function (event) {\n  var type = event.type || event; // deprecation\n  // In a future version we should default target to `this`\n  // similar to how we default the target to `elem` in\n  // `Events.trigger`. Right now the default `target` will be\n  // `document` due to the `Event.fixEvent` call.\n\n  if (typeof event === 'string') {\n    event = {\n      type: type\n    };\n  }\n\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\n\n\nEventTarget$2.prototype.dispatchEvent = EventTarget$2.prototype.trigger;\nvar EVENT_MAP;\n\nEventTarget$2.prototype.queueTrigger = function (event) {\n  var _this = this;\n\n  // only set up EVENT_MAP if it'll be used\n  if (!EVENT_MAP) {\n    EVENT_MAP = new Map();\n  }\n\n  var type = event.type || event;\n  var map = EVENT_MAP.get(this);\n\n  if (!map) {\n    map = new Map();\n    EVENT_MAP.set(this, map);\n  }\n\n  var oldTimeout = map.get(type);\n  map[\"delete\"](type);\n  window$1.clearTimeout(oldTimeout);\n  var timeout = window$1.setTimeout(function () {\n    map[\"delete\"](type); // if we cleared out all timeouts for the current target, delete its map\n\n    if (map.size === 0) {\n      map = null;\n      EVENT_MAP[\"delete\"](_this);\n    }\n\n    _this.trigger(event);\n  }, 0);\n  map.set(type, timeout);\n};\n\n/**\n * @file mixins/evented.js\n * @module evented\n */\n\nvar objName = function objName(obj) {\n  if (typeof obj.name === 'function') {\n    return obj.name();\n  }\n\n  if (typeof obj.name === 'string') {\n    return obj.name;\n  }\n\n  if (obj.name_) {\n    return obj.name_;\n  }\n\n  if (obj.constructor && obj.constructor.name) {\n    return obj.constructor.name;\n  }\n\n  return typeof obj;\n};\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\n\n\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget$2 || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n/**\n * Adds a callback to run after the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to Add\n * @param  {Function} callback\n *         The callback to run.\n */\n\n\nvar addEventedCallback = function addEventedCallback(target, callback) {\n  if (isEvented(target)) {\n    callback();\n  } else {\n    if (!target.eventedCallbacks) {\n      target.eventedCallbacks = [];\n    }\n\n    target.eventedCallbacks.push(callback);\n  }\n};\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\n\n\nvar isValidEventType = function isValidEventType(type) {\n  return (// The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateTarget = function validateTarget(target, obj, fnName) {\n  if (!target || !target.nodeName && !isEvented(target)) {\n    throw new Error(\"Invalid target for \" + objName(obj) + \"#\" + fnName + \"; must be a DOM node or evented object.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n *\n * @param  {Object} obj\n*         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateEventType = function validateEventType(type, obj, fnName) {\n  if (!isValidEventType(type)) {\n    throw new Error(\"Invalid event type for \" + objName(obj) + \"#\" + fnName + \"; must be a non-empty string or array.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateListener = function validateListener(listener, obj, fnName) {\n  if (typeof listener !== 'function') {\n    throw new Error(\"Invalid listener for \" + objName(obj) + \"#\" + fnName + \"; must be a function.\");\n  }\n};\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\n\n\nvar normalizeListenArgs = function normalizeListenArgs(self, args, fnName) {\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target;\n  var type;\n  var listener;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_; // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target, self, fnName);\n  validateEventType(type, self, fnName);\n  validateListener(listener, self, fnName);\n  listener = bind(self, listener);\n  return {\n    isTargetingSelf: isTargetingSelf,\n    target: target,\n    type: type,\n    listener: listener\n  };\n};\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\n\n\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target, target, method);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n/**\n * Contains methods that provide event capabilities to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\n\n\nvar EventedMixin = {\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args, 'on'),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener); // If this object is listening to another evented object.\n\n    if (!isTargetingSelf) {\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      }; // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n\n\n      removeListenerOnDispose.guid = listener.guid; // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      removeRemoverOnTargetDispose.guid = listener.guid;\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will be called once per event and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args, 'one'),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener); // Targeting another evented object.\n    } else {\n      // TODO: This wrapper is incorrect! It should only\n      //       remove the wrapper for the event type that called it.\n      //       Instead all listners are removed on the first trigger!\n      //       see https://github.com/videojs/video.js/issues/5962\n      var wrapper = function wrapper() {\n        _this2.off(target, type, wrapper);\n\n        for (var _len3 = arguments.length, largs = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once for the first event that is triggered\n   * then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  any: function any() {\n    var _this3 = this;\n\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    var _normalizeListenArgs3 = normalizeListenArgs(this, args, 'any'),\n        isTargetingSelf = _normalizeListenArgs3.isTargetingSelf,\n        target = _normalizeListenArgs3.target,\n        type = _normalizeListenArgs3.type,\n        listener = _normalizeListenArgs3.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'any', type, listener); // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        _this3.off(target, type, wrapper);\n\n        for (var _len5 = arguments.length, largs = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {\n          largs[_key5] = arguments[_key5];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'any', type, wrapper);\n    }\n  },\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$1(targetOrType, typeOrListener, listener) {\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener); // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener; // Fail fast and in a meaningful way!\n\n      validateTarget(target, this, 'off');\n      validateEventType(type, this, 'off');\n      validateListener(listener, this, 'off'); // Ensure there's at least a guid, even if the function hasn't been used\n\n      listener = bind(this, listener); // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @return {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$1(event, hash) {\n    validateTarget(this.eventBusEl_, this, 'trigger');\n    var type = event && typeof event !== 'string' ? event.type : event;\n\n    if (!isValidEventType(type)) {\n      var error = \"Invalid event type for \" + objName(this) + \"#trigger; \" + 'must be a non-empty string or object with a type key that has a non-empty value.';\n\n      if (event) {\n        (this.log || log$1).error(error);\n      } else {\n        throw new Error(error);\n      }\n    }\n\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {string} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\n\nfunction evented(target, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      eventBusKey = _options.eventBusKey; // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error(\"The eventBusKey \\\"\" + eventBusKey + \"\\\" does not refer to an element.\");\n    }\n\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', {\n      className: 'vjs-event-bus'\n    });\n  }\n\n  assign(target, EventedMixin);\n\n  if (target.eventedCallbacks) {\n    target.eventedCallbacks.forEach(function (callback) {\n      callback();\n    });\n  } // When any evented object is disposed, it removes all its listeners.\n\n\n  target.on('dispose', function () {\n    target.off();\n    [target, target.el_, target.eventBusEl_].forEach(function (val) {\n      if (val && DomData.has(val)) {\n        DomData[\"delete\"](val);\n      }\n    });\n    window$1.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n  return target;\n}\n\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\n\nvar StatefulMixin = {\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @return {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this;\n\n    // Support providing the `stateUpdates` state as a function.\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes;\n    each(stateUpdates, function (value, key) {\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    }); // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n\n    if (changes && isEvented(this)) {\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @return {Object}\n *          Returns the `target`.\n */\n\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin); // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n\n  target.state = assign({}, target.state, defaultState); // Auto-bind the `handleStateChanged` method of the target object if it exists.\n\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n\n/**\n * @file string-cases.js\n * @module to-lower-case\n */\n\n/**\n * Lowercase the first letter of a string.\n *\n * @param {string} string\n *        String to be lowercased\n *\n * @return {string}\n *         The string with a lowercased first letter\n */\nvar toLowerCase = function toLowerCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toLowerCase();\n  });\n};\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\n\nvar toTitleCase$1 = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\n\nvar titleCaseEquals = function titleCaseEquals(str1, str2) {\n  return toTitleCase$1(str1) === toTitleCase$1(str2);\n};\n\n/**\n * @file merge-options.js\n * @module merge-options\n */\n/**\n * Merge two objects recursively.\n *\n * Performs a deep merge like\n * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges\n * plain objects (not arrays, elements, or anything else).\n *\n * Non-plain object values will be copied directly from the right-most\n * argument.\n *\n * @static\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @return {Object}\n *          A new object that is the merged result of all sources.\n */\n\nfunction mergeOptions$3() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = new Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions$3(result[key], value);\n    });\n  });\n  return result;\n}\n\nvar MapSham = /*#__PURE__*/function () {\n  function MapSham() {\n    this.map_ = {};\n  }\n\n  var _proto = MapSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.map_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.map_[key];\n    return has;\n  };\n\n  _proto.set = function set(key, value) {\n    this.map_[key] = value;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.map_) {\n      callback.call(thisArg, this.map_[key], key, this);\n    }\n  };\n\n  return MapSham;\n}();\n\nvar Map$1 = window$1.Map ? window$1.Map : MapSham;\n\nvar SetSham = /*#__PURE__*/function () {\n  function SetSham() {\n    this.set_ = {};\n  }\n\n  var _proto = SetSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.set_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.set_[key];\n    return has;\n  };\n\n  _proto.add = function add(key) {\n    this.set_[key] = 1;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.set_) {\n      callback.call(thisArg, key, key, this);\n    }\n  };\n\n  return SetSham;\n}();\n\nvar Set$1 = window$1.Set ? window$1.Set : SetSham;\n\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\nvar Component$1 = /*#__PURE__*/function () {\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of component options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param  {string} [options.className]\n   *         A class or space separated list of classes to add the component\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    var _this = this;\n\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    }\n\n    this.isDisposed_ = false; // Hold the reference to the parent component via `addChild` method\n\n    this.parentComponent_ = null; // Make a copy of prototype.options_ to protect against overriding defaults\n\n    this.options_ = mergeOptions$3({}, this.options_); // Updated options with supplied options\n\n    options = this.options_ = mergeOptions$3(this.options_, options); // Get ID from options or options element if one is supplied\n\n    this.id_ = options.id || options.el && options.el.id; // If there was no ID from the options, generate one\n\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n      this.id_ = id + \"_component_\" + newGUID();\n    }\n\n    this.name_ = options.name || null; // Create element if one wasn't provided in options\n\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    }\n\n    if (options.className && this.el_) {\n      options.className.split(' ').forEach(function (c) {\n        return _this.addClass(c);\n      });\n    } // if evented is anything except false, we want to mixin in evented\n\n\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, {\n        eventBusKey: this.el_ ? 'el_' : null\n      });\n      this.handleLanguagechange = this.handleLanguagechange.bind(this);\n      this.on(this.player_, 'languagechange', this.handleLanguagechange);\n    }\n\n    stateful(this, this.constructor.defaultState);\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n    this.setTimeoutIds_ = new Set$1();\n    this.setIntervalIds_ = new Set$1();\n    this.rafIds_ = new Set$1();\n    this.namedRafs_ = new Map$1();\n    this.clearingTimersOnDispose_ = false; // Add any child components in options\n\n    if (options.initChildren !== false) {\n      this.initChildren();\n    } // Don't want to trigger ready here or it will go before init is actually\n    // finished for all children that run this constructor\n\n\n    this.ready(ready);\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   *\n   * @param {Object} options\n   * @param {Element} options.originalEl element with which to replace player element\n   */\n\n\n  var _proto = Component.prototype;\n\n  _proto.dispose = function dispose(options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    // Bail out if the component has already been disposed.\n    if (this.isDisposed_) {\n      return;\n    }\n\n    if (this.readyQueue_) {\n      this.readyQueue_.length = 0;\n    }\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the dispose event does not\n     *           bubble up\n     */\n\n\n    this.trigger({\n      type: 'dispose',\n      bubbles: false\n    });\n    this.isDisposed_ = true; // Dispose all children.\n\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    } // Delete child references\n\n\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n    this.parentComponent_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        if (options.restoreEl) {\n          this.el_.parentNode.replaceChild(options.restoreEl, this.el_);\n        } else {\n          this.el_.parentNode.removeChild(this.el_);\n        }\n      }\n\n      this.el_ = null;\n    } // remove reference to the player after disposing of the element\n\n\n    this.player_ = null;\n  }\n  /**\n   * Determine whether or not this component has been disposed.\n   *\n   * @return {boolean}\n   *         If the component has been disposed, will be `true`. Otherwise, `false`.\n   */\n  ;\n\n  _proto.isDisposed = function isDisposed() {\n    return Boolean(this.isDisposed_);\n  }\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n  ;\n\n  _proto.player = function player() {\n    return this.player_;\n  }\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   */\n  ;\n\n  _proto.options = function options(obj) {\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions$3(this.options_, obj);\n    return this.options_;\n  }\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n  ;\n\n  _proto.el = function el() {\n    return this.el_;\n  }\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  }\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n  ;\n\n  _proto.localize = function localize(string, tokens, defaultValue) {\n    if (defaultValue === void 0) {\n      defaultValue = string;\n    }\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  }\n  /**\n   * Handles language change for the player in components. Should be overriden by sub-components.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {}\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n  ;\n\n  _proto.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  }\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n  ;\n\n  _proto.id = function id() {\n    return this.id_;\n  }\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n  ;\n\n  _proto.name = function name() {\n    return this.name_;\n  }\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n  ;\n\n  _proto.children = function children() {\n    return this.children_;\n  }\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n  ;\n\n  _proto.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  }\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n  ;\n\n  _proto.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    return this.childNameIndex_[name];\n  }\n  /**\n   * Returns the descendant `Component` following the givent\n   * descendant `names`. For instance ['foo', 'bar', 'baz'] would\n   * try to get 'foo' on the current component, 'bar' on the 'foo'\n   * component and 'baz' on the 'bar' component and return undefined\n   * if any of those don't exist.\n   *\n   * @param {...string[]|...string} names\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The descendant `Component` following the given descendant\n   *         `names` or undefined.\n   */\n  ;\n\n  _proto.getDescendant = function getDescendant() {\n    for (var _len = arguments.length, names = new Array(_len), _key = 0; _key < _len; _key++) {\n      names[_key] = arguments[_key];\n    }\n\n    // flatten array argument into the main array\n    names = names.reduce(function (acc, n) {\n      return acc.concat(n);\n    }, []);\n    var currentChild = this;\n\n    for (var i = 0; i < names.length; i++) {\n      currentChild = currentChild.getChild(names[i]);\n\n      if (!currentChild || !currentChild.getChild) {\n        return;\n      }\n    }\n\n    return currentChild;\n  }\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options, index) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (index === void 0) {\n      index = this.children_.length;\n    }\n\n    var component;\n    var componentName; // If child is a string, create component with options\n\n    if (typeof child === 'string') {\n      componentName = toTitleCase$1(child);\n      var componentClassName = options.componentClass || componentName; // Set name through options\n\n      options.name = componentName; // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error(\"Component \" + componentClassName + \" does not exist\");\n      } // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n\n\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options); // child is a component instance\n    } else {\n      component = child;\n    }\n\n    if (component.parentComponent_) {\n      component.parentComponent_.removeChild(component);\n    }\n\n    this.children_.splice(index, 0, component);\n    component.parentComponent_ = this;\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    } // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n\n\n    componentName = componentName || component.name && toTitleCase$1(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n      this.childNameIndex_[toLowerCase(componentName)] = component;\n    } // Add the UI object's element to the container div (box)\n    // Having an element is not required\n\n\n    if (typeof component.el === 'function' && component.el()) {\n      // If inserting before a component, insert before that component's element\n      var refNode = null;\n\n      if (this.children_[index + 1]) {\n        // Most children are components, but the video tech is an HTML element\n        if (this.children_[index + 1].el_) {\n          refNode = this.children_[index + 1].el_;\n        } else if (isEl(this.children_[index + 1])) {\n          refNode = this.children_[index + 1];\n        }\n      }\n\n      this.contentEl().insertBefore(component.el(), refNode);\n    } // Return so it can stored on parent object if desired.\n\n\n    return component;\n  }\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    component.parentComponent_ = null;\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[toTitleCase$1(component.name())] = null;\n    this.childNameIndex_[toLowerCase(component.name())] = null;\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  }\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n  ;\n\n  _proto.initChildren = function initChildren() {\n    var _this2 = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts; // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        } // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n\n\n        if (opts === false) {\n          return;\n        } // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n\n\n        if (opts === true) {\n          opts = {};\n        } // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n\n\n        opts.playerOptions = _this2.options_.playerOptions; // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n\n        var newChild = _this2.addChild(name, opts);\n\n        if (newChild) {\n          _this2[name] = newChild;\n        }\n      }; // Allow for an array of children details to passed in the options\n\n\n      var workingChildren;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name;\n        var opts;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this2.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return {\n          name: name,\n          opts: opts\n        };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase$1(child.name));\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  }\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  }\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n  ;\n\n  _proto.ready = function ready(fn, sync) {\n    if (sync === void 0) {\n      sync = false;\n    }\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  }\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n  ;\n\n  _proto.triggerReady = function triggerReady() {\n    this.isReady_ = true; // Ensure ready is triggered asynchronously\n\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_; // Reset Ready Queue\n\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      } // Allow for using event listeners also\n\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n\n\n      this.trigger('ready');\n    }, 1);\n  }\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$ = function $$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  }\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$$ = function $$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  }\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n  ;\n\n  _proto.hasClass = function hasClass$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  }\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n  ;\n\n  _proto.addClass = function addClass$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  }\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n  ;\n\n  _proto.removeClass = function removeClass$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  }\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n  ;\n\n  _proto.toggleClass = function toggleClass$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  }\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n  ;\n\n  _proto.show = function show() {\n    this.removeClass('vjs-hidden');\n  }\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n  ;\n\n  _proto.hide = function hide() {\n    this.addClass('vjs-hidden');\n  }\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  }\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  }\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n  ;\n\n  _proto.getAttribute = function getAttribute$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  }\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n  ;\n\n  _proto.setAttribute = function setAttribute$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  }\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n  ;\n\n  _proto.removeAttribute = function removeAttribute$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  }\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  }\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  }\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n  ;\n\n  _proto.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  }\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n  ;\n\n  _proto.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      } // Check if using css width/height (% or px) and adjust\n\n\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      } // skipListeners allows us to avoid triggering the resize event when setting both width and height\n\n\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    } // Not setting a value, so getting it\n    // Make sure element exists\n\n\n    if (!this.el_) {\n      return 0;\n    } // Get dimension value from style\n\n\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    } // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n\n\n    return parseInt(this.el_['offset' + toTitleCase$1(widthOrHeight)], 10);\n  }\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n  ;\n\n  _proto.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    computedWidthOrHeight = computedStyle(this.el_, widthOrHeight); // remove 'px' from variable and parse as integer\n\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight); // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs wherever getComputedStyle doesn't exist.\n\n    if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {\n      var rule = \"offset\" + toTitleCase$1(widthOrHeight);\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  }\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n  ;\n\n  _proto.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  }\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n  ;\n\n  _proto.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  }\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n  ;\n\n  _proto.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  }\n  /**\n   * Set the focus to this component\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.el_.focus();\n  }\n  /**\n   * Remove the focus from this component\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.el_.blur();\n  }\n  /**\n   * When this Component receives a `keydown` event which it does not process,\n   *  it passes the event to the Player for handling.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (this.player_) {\n      // We only stop propagation here because we want unhandled events to fall\n      // back to the browser. Exclude Tab for focus trapping.\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.stopPropagation();\n      }\n\n      this.player_.handleKeyDown(event);\n    }\n  }\n  /**\n   * Many components used to have a `handleKeyPress` method, which was poorly\n   * named because it listened to a `keydown` event. This method name now\n   * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`\n   * will not see their method calls stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    this.handleKeyDown(event);\n  }\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n  ;\n\n  _proto.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null; // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n\n    var tapMovementThreshold = 10; // The maximum length a touch can be while still being considered a tap\n\n    var touchTimeThreshold = 200;\n    var couldBeTap;\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        }; // Record start time so we can detect a tap vs. \"touch and hold\"\n\n        touchStart = window$1.performance.now(); // Reset couldBeTap tracking\n\n        couldBeTap = true;\n      }\n    });\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    }; // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n\n\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap); // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n\n    this.on('touchend', function (event) {\n      firstTouch = null; // Proceed only if the touchmove/leave/cancel event didn't happen\n\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = window$1.performance.now() - touchStart; // Make sure the touch was less than the threshold to be considered a tap\n\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('tap'); // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  }\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n  ;\n\n  _proto.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    } // listener for reporting that the user is active\n\n\n    var report = bind(this.player(), this.player().reportUserActivity);\n    var touchHolding;\n    this.on('touchstart', function () {\n      report(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(touchHolding); // report at the same interval as activityCheck\n\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report(); // stop the interval that maintains activity if the touch is holding\n\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  }\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n  ;\n\n  _proto.setTimeout = function setTimeout(fn, timeout) {\n    var _this3 = this;\n\n    // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n    var timeoutId;\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    timeoutId = window$1.setTimeout(function () {\n      if (_this3.setTimeoutIds_.has(timeoutId)) {\n        _this3.setTimeoutIds_[\"delete\"](timeoutId);\n      }\n\n      fn();\n    }, timeout);\n    this.setTimeoutIds_.add(timeoutId);\n    return timeoutId;\n  }\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n  ;\n\n  _proto.clearTimeout = function clearTimeout(timeoutId) {\n    if (this.setTimeoutIds_.has(timeoutId)) {\n      this.setTimeoutIds_[\"delete\"](timeoutId);\n      window$1.clearTimeout(timeoutId);\n    }\n\n    return timeoutId;\n  }\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n  ;\n\n  _proto.setInterval = function setInterval(fn, interval) {\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    var intervalId = window$1.setInterval(fn, interval);\n    this.setIntervalIds_.add(intervalId);\n    return intervalId;\n  }\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n  ;\n\n  _proto.clearInterval = function clearInterval(intervalId) {\n    if (this.setIntervalIds_.has(intervalId)) {\n      this.setIntervalIds_[\"delete\"](intervalId);\n      window$1.clearInterval(intervalId);\n    }\n\n    return intervalId;\n  }\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n  ;\n\n  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this4 = this;\n\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.setTimeout(fn, 1000 / 60);\n    }\n\n    this.clearTimersOnDispose_(); // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n\n    var id;\n    fn = bind(this, fn);\n    id = window$1.requestAnimationFrame(function () {\n      if (_this4.rafIds_.has(id)) {\n        _this4.rafIds_[\"delete\"](id);\n      }\n\n      fn();\n    });\n    this.rafIds_.add(id);\n    return id;\n  }\n  /**\n   * Request an animation frame, but only one named animation\n   * frame will be queued. Another will never be added until\n   * the previous one finishes.\n   *\n   * @param {string} name\n   *        The name to give this requestAnimationFrame\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   */\n  ;\n\n  _proto.requestNamedAnimationFrame = function requestNamedAnimationFrame(name, fn) {\n    var _this5 = this;\n\n    if (this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.clearTimersOnDispose_();\n    fn = bind(this, fn);\n    var id = this.requestAnimationFrame(function () {\n      fn();\n\n      if (_this5.namedRafs_.has(name)) {\n        _this5.namedRafs_[\"delete\"](name);\n      }\n    });\n    this.namedRafs_.set(name, id);\n    return name;\n  }\n  /**\n   * Cancels a current named animation frame if it exists.\n   *\n   * @param {string} name\n   *        The name of the requestAnimationFrame to cancel.\n   */\n  ;\n\n  _proto.cancelNamedAnimationFrame = function cancelNamedAnimationFrame(name) {\n    if (!this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.cancelAnimationFrame(this.namedRafs_.get(name));\n    this.namedRafs_[\"delete\"](name);\n  }\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n  ;\n\n  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.clearTimeout(id);\n    }\n\n    if (this.rafIds_.has(id)) {\n      this.rafIds_[\"delete\"](id);\n      window$1.cancelAnimationFrame(id);\n    }\n\n    return id;\n  }\n  /**\n   * A function to setup `requestAnimationFrame`, `setTimeout`,\n   * and `setInterval`, clearing on dispose.\n   *\n   * > Previously each timer added and removed dispose listeners on it's own.\n   * For better performance it was decided to batch them all, and use `Set`s\n   * to track outstanding timer ids.\n   *\n   * @private\n   */\n  ;\n\n  _proto.clearTimersOnDispose_ = function clearTimersOnDispose_() {\n    var _this6 = this;\n\n    if (this.clearingTimersOnDispose_) {\n      return;\n    }\n\n    this.clearingTimersOnDispose_ = true;\n    this.one('dispose', function () {\n      [['namedRafs_', 'cancelNamedAnimationFrame'], ['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(function (_ref) {\n        var idName = _ref[0],\n            cancelName = _ref[1];\n\n        // for a `Set` key will actually be the value again\n        // so forEach((val, val) =>` but for maps we want to use\n        // the key.\n        _this6[idName].forEach(function (val, key) {\n          return _this6[cancelName](key);\n        });\n      });\n      _this6.clearingTimersOnDispose_ = false;\n    });\n  }\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n  ;\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error(\"Illegal component name, \\\"\" + name + \"\\\"; must be a non-empty string.\");\n    }\n\n    var Tech = Component.getComponent('Tech'); // We need to make sure this check is only done if Tech has been registered.\n\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error(\"Illegal component, \\\"\" + name + \"\\\"; \" + reason + \".\");\n    }\n\n    name = toTitleCase$1(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players); // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n    Component.components_[toLowerCase(name)] = ComponentToRegister;\n    return ComponentToRegister;\n  }\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   */\n  ;\n\n  Component.getComponent = function getComponent(name) {\n    if (!name || !Component.components_) {\n      return;\n    }\n\n    return Component.components_[name];\n  };\n\n  return Component;\n}();\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent$1.prototype.supportsRaf_ = typeof window$1.requestAnimationFrame === 'function' && typeof window$1.cancelAnimationFrame === 'function';\nComponent$1.registerComponent('Component', Component$1);\n\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @typedef    {Function} TimeRangeIndex\n *\n * @param      {number} [index=0]\n *             The range number to return the time for.\n *\n * @return     {number}\n *             The time offset at the specified index.\n *\n * @deprecated The index argument must be provided.\n *             In the future, leaving it out will throw an error.\n */\n\n/**\n * An object that contains ranges of time.\n *\n * @typedef  {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this object.\n *\n * @property {module:time-ranges~TimeRangeIndex} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {module:time-ranges~TimeRangeIndex} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @private\n * @param   {string} fnName\n *          The function name to use for logging\n *\n * @param   {number} index\n *          The index to check\n *\n * @param   {number} maxIndex\n *          The maximum possible index\n *\n * @throws  {Error} if the timeRanges provided are over the maxIndex\n */\n\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error(\"Failed to execute '\" + fnName + \"' on 'TimeRanges': The index provided (\" + index + \") is non-numeric or out of bounds (0-\" + maxIndex + \").\");\n  }\n}\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @private\n * @param      {string} fnName\n *             The function name to use for logging\n *\n * @param      {string} valueIndex\n *             The property that should be used to get the time. should be\n *             'start' or 'end'\n *\n * @param      {Array} ranges\n *             An array of time ranges\n *\n * @param      {Array} [rangeIndex=0]\n *             The index to start the search at\n *\n * @return     {number}\n *             The time that offset at the specified index.\n *\n * @deprecated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws     {Error} if rangeIndex is more than the length of ranges\n */\n\n\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n/**\n * Create a time range object given ranges of time.\n *\n * @private\n * @param   {Array} [ranges]\n *          An array of time ranges.\n */\n\n\nfunction createTimeRangesObj(ranges) {\n  var timeRangesObj;\n\n  if (ranges === undefined || ranges.length === 0) {\n    timeRangesObj = {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  } else {\n    timeRangesObj = {\n      length: ranges.length,\n      start: getRange.bind(null, 'start', 0, ranges),\n      end: getRange.bind(null, 'end', 1, ranges)\n    };\n  }\n\n  if (window$1.Symbol && window$1.Symbol.iterator) {\n    timeRangesObj[window$1.Symbol.iterator] = function () {\n      return (ranges || []).values();\n    };\n  }\n\n  return timeRangesObj;\n}\n/**\n * Create a `TimeRange` object which mimics an\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.\n *\n * @param {number|Array[]} start\n *        The start of a single range (a number) or an array of ranges (an\n *        array of arrays of two numbers each).\n *\n * @param {number} end\n *        The end of a single range. Cannot be used with the array form of\n *        the `start` argument.\n */\n\n\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n\n  return createTimeRangesObj([[start, end]]);\n}\n\n/**\n * @file buffer.js\n * @module buffer\n */\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\n\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start;\n  var end;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i); // buffered end can be bigger than duration by a very small fraction\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n\n/**\n * @file media-error.js\n */\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\n\nfunction MediaError(value) {\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\n\n\nMediaError.prototype.code = 0;\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\n\nMediaError.prototype.message = '';\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\n\nMediaError.prototype.status = null;\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_ABORTED\n * @property {string} 2 - MEDIA_ERR_NETWORK\n * @property {string} 3 - MEDIA_ERR_DECODE\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\n\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\n\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n}; // Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\n\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum; // values should be accessible on both the class and instance\n\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n} // jsdocs for instance/static members added above\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {boolean}\n *         Whether or not the object is `Promise`-like.\n */\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\n\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n  return ret;\n};\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\n\n\nvar textTracksToJson = function textTracksToJson(tech) {\n  var trackEls = tech.$$('track');\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n\n    return json;\n  });\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\n\n\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n  return tech.textTracks();\n};\n\nvar textTrackConverter = {\n  textTracksToJson: textTracksToJson,\n  jsonToTextTracks: jsonToTextTracks,\n  trackToJson_: trackToJson_\n};\n\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ModalDialog, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.pauseOnOpen=true]\n   *        If `true`, playback will will be paused if playing when\n   *        the modal opens, and resumed when it closes.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n  function ModalDialog(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.close_ = function (e) {\n      return _this.close(e);\n    };\n\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n\n    _this.content(_this.options_.content); // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n\n\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + \"-content\"\n    }, {\n      role: 'document'\n    });\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + \"-description vjs-control-text\",\n      id: _this.el().getAttribute('aria-describedby')\n    });\n    textContent(_this.descEl_, _this.description());\n\n    _this.el_.appendChild(_this.descEl_);\n\n    _this.el_.appendChild(_this.contentEl_);\n\n    return _this;\n  }\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  var _proto = ModalDialog.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + \"_description\",\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + \" vjs-hidden \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n  ;\n\n  _proto.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  }\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n  ;\n\n  _proto.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.'); // Append a universal closeability message if the modal is closeable.\n\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  }\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n  ;\n\n  _proto.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('beforemodalopen');\n      this.opened_ = true; // Fill content if the modal has never opened before and\n      // never been filled.\n\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      } // If the player was playing, pause it and take note of its previously\n      // playing state.\n\n\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      this.on('keydown', this.handleKeyDown_); // Hide controls and note if they were enabled.\n\n      this.hadControls_ = player.controls();\n      player.controls(false);\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  }\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n  ;\n\n  _proto.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n\n    return this.opened_;\n  }\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n  ;\n\n  _proto.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n\n    var player = this.player();\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    this.off('keydown', this.handleKeyDown_);\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  }\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n  ;\n\n  _proto.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton'); // If this is being made closeable and has no close button, add one.\n\n      if (closeable && !close) {\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', {\n          controlText: 'Close Modal Dialog'\n        });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close_);\n      } // If this is being made uncloseable and has a close button, remove it.\n\n\n      if (!closeable && close) {\n        this.off(close, 'close', this.close_);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n\n    return this.closeable_;\n  }\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n  ;\n\n  _proto.fill = function fill() {\n    this.fillWith(this.content());\n  }\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n  ;\n\n  _proto.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n    /**\n      * Fired just before a `ModalDialog` is filled with content.\n      *\n      * @event ModalDialog#beforemodalfill\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true; // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('modalfill'); // Re-inject the re-filled content element.\n\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    } // make sure that the close button is last in the dialog DOM\n\n\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  }\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n  ;\n\n  _proto.empty = function empty() {\n    /**\n    * Fired just before a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#beforemodalempty\n    * @type {EventTarget~Event}\n    */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n    /**\n    * Fired just after a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#modalempty\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('modalempty');\n  }\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n  ;\n\n  _proto.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n\n    return this.content_;\n  }\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n      this.focus();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n  }\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Do not allow keydowns to reach out of the modal dialog.\n    event.stopPropagation();\n\n    if (keycode.isEventKey(event, 'Escape') && this.closeable()) {\n      event.preventDefault();\n      this.close();\n      return;\n    } // exit early if it isn't a tab key\n\n\n    if (!keycode.isEventKey(event, 'Tab')) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  }\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n  ;\n\n  _proto.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window$1.HTMLAnchorElement || child instanceof window$1.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window$1.HTMLInputElement || child instanceof window$1.HTMLSelectElement || child instanceof window$1.HTMLTextAreaElement || child instanceof window$1.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window$1.HTMLIFrameElement || child instanceof window$1.HTMLObjectElement || child instanceof window$1.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component$1);\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\nComponent$1.registerComponent('ModalDialog', ModalDialog);\n\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(TrackList, _EventTarget);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @abstract\n   */\n  function TrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.tracks_ = [];\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'length', {\n      get: function get() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      _this.addTrack(tracks[i]);\n    }\n\n    return _this;\n  }\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = TrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.tracks_[index];\n        }\n      });\n    } // Do not add duplicate tracks\n\n\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n\n      this.trigger({\n        track: track,\n        type: 'addtrack',\n        target: this\n      });\n    }\n    /**\n     * Triggered when a track label is changed.\n     *\n     * @event TrackList#addtrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was added.\n     */\n\n\n    track.labelchange_ = function () {\n      _this2.trigger({\n        track: track,\n        type: 'labelchange',\n        target: _this2\n      });\n    };\n\n    if (isEvented(track)) {\n      track.addEventListener('labelchange', track.labelchange_);\n    }\n  }\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n  ;\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    var track;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n\n\n    this.trigger({\n      track: track,\n      type: 'removetrack',\n      target: this\n    });\n  }\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {string} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n  ;\n\n  _proto.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget$2);\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack',\n  labelchange: 'labelchange'\n}; // emulate attribute EventHandler support to allow for feature detection\n\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another audio track is enabled, disable it\n\n\n    list[i].enabled = false;\n  }\n};\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\n\nvar AudioTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(AudioTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n  function AudioTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    return _this;\n  }\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = AudioTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.enabledChange_ = function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('enabledchange', track.enabledChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.enabledChange_) {\n      rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);\n      rtrack.enabledChange_ = null;\n    }\n  };\n\n  return AudioTrackList;\n}(TrackList);\n\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another video track is enabled, disable it\n\n\n    list[i].selected = false;\n  }\n};\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\n\nvar VideoTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(VideoTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n  function VideoTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selectedIndex', {\n      get: function get() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n\n        return -1;\n      },\n      set: function set() {}\n    });\n    return _this;\n  }\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = VideoTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.selectedChange_ = function () {\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('selectedchange', track.selectedChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.selectedChange_) {\n      rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);\n      rtrack.selectedChange_ = null;\n    }\n  };\n\n  return VideoTrackList;\n}(TrackList);\n\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\nvar TextTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(TextTrackList, _TrackList);\n\n  function TextTrackList() {\n    return _TrackList.apply(this, arguments) || this;\n  }\n\n  var _proto = TextTrackList.prototype;\n\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n  _proto.addTrack = function addTrack(track) {\n    var _this = this;\n\n    _TrackList.prototype.addTrack.call(this, track);\n\n    if (!this.queueChange_) {\n      this.queueChange_ = function () {\n        return _this.queueTrigger('change');\n      };\n    }\n\n    if (!this.triggerSelectedlanguagechange) {\n      this.triggerSelectedlanguagechange_ = function () {\n        return _this.trigger('selectedlanguagechange');\n      };\n    }\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('modechange', this.queueChange_);\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', this.triggerSelectedlanguagechange_);\n    }\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack); // manually remove the event handlers we added\n\n\n    if (rtrack.removeEventListener) {\n      if (this.queueChange_) {\n        rtrack.removeEventListener('modechange', this.queueChange_);\n      }\n\n      if (this.selectedlanguagechange_) {\n        rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);\n      }\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\nvar HtmlTrackElementList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList(trackElements) {\n    if (trackElements === void 0) {\n      trackElements = [];\n    }\n\n    this.trackElements_ = [];\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      this.addTrackElement_(trackElements[i]);\n    }\n  }\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  var _proto = HtmlTrackElementList.prototype;\n\n  _proto.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.trackElements_[index];\n        }\n      });\n    } // Do not add duplicate elements\n\n\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  }\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n  ;\n\n  _proto.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n        break;\n      }\n    }\n\n    return trackElement_;\n  }\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {\n          this.trackElements_[i].track.off();\n        }\n\n        if (typeof this.trackElements_[i].off === 'function') {\n          this.trackElements_[i].off();\n        }\n\n        this.trackElements_.splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n\n/**\n * @file text-track-cue-list.js\n */\n\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\nvar TextTrackCueList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    TextTrackCueList.prototype.setCues_.call(this, cues);\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.length_;\n      }\n    });\n  }\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  var _proto = TextTrackCueList.prototype;\n\n  _proto.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  }\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n  ;\n\n  _proto.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\n\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\n\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\n\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(Track, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n  function Track(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      language: options.language || ''\n    };\n    var label = options.label || '';\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(_assertThisInitialized(_this), key, {\n        get: function get() {\n          return trackProps[key];\n        },\n        set: function set() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @fires Track#labelchange\n     */\n\n\n    Object.defineProperty(_assertThisInitialized(_this), 'label', {\n      get: function get() {\n        return label;\n      },\n      set: function set(newLabel) {\n        if (newLabel !== label) {\n          label = newLabel;\n          /**\n           * An event that fires when label changes on this track.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event Track#labelchange\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('labelchange');\n        }\n      }\n    });\n    return _this;\n  }\n\n  return Track;\n}(EventTarget$2);\n\n/**\n * @file url.js\n * @module url\n */\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @function\n * @param    {String} url\n *           The url to parse\n *\n * @return   {url:URLObject}\n *           An object of url details\n */\n\nvar parseUrl = function parseUrl(url) {\n  // This entire method can be replace with URL once we are able to drop IE11\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host']; // add the url to an anchor and let the browser parse the URL\n\n  var a = document.createElement('a');\n  a.href = url; // Copy the specific URL properties to a new object\n  // This is also needed for IE because the anchor loses its\n  // properties when it's removed from the dom\n\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  } // IE adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n\n\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window$1.location.protocol;\n  }\n  /* istanbul ignore if */\n\n\n  if (!details.host) {\n    details.host = window$1.location.host;\n  }\n\n  return details;\n};\n/**\n * Get absolute version of relative URL. Used to tell Flash the correct URL.\n *\n * @function\n * @param    {string} url\n *           URL to make absolute\n *\n * @return   {string}\n *           Absolute URL\n *\n * @see      http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\n\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    // add the url to an anchor and let the browser parse the URL\n    var a = document.createElement('a');\n    a.href = url;\n    url = a.href;\n  }\n\n  return url;\n};\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @function\n * @param    {string} path\n *           The fileName path like '/path/to/file.mp4'\n *\n * @return  {string}\n *           The extension in lower case or an empty string if no\n *           extension could be found.\n */\n\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @function\n * @param    {string} url\n *           The url to check.\n *\n * @param    {Object} [winLoc]\n *           the domain to check the url against, defaults to window.location\n *\n * @param    {string} [winLoc.protocol]\n *           The window location protocol defaults to window.location.protocol\n *\n * @param    {string} [winLoc.host]\n *           The window location host defaults to window.location.host\n *\n * @return   {boolean}\n *           Whether it is a cross domain request or not.\n */\n\nvar isCrossOrigin = function isCrossOrigin(url, winLoc) {\n  if (winLoc === void 0) {\n    winLoc = window$1.location;\n  }\n\n  var urlInfo = parseUrl(url); // IE8 protocol relative urls will return ':' for protocol\n\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol; // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n  return crossOrigin;\n};\n\nvar Url = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  parseUrl: parseUrl,\n  getAbsoluteURL: getAbsoluteURL,\n  getFileExtension: getFileExtension,\n  isCrossOrigin: isCrossOrigin\n});\n\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\n\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, window$1.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n\n  if (errors.length > 0) {\n    if (window$1.console && window$1.console.groupCollapsed) {\n      window$1.console.groupCollapsed(\"Text Track parsing errors for \" + track.src);\n    }\n\n    errors.forEach(function (error) {\n      return log$1.error(error);\n    });\n\n    if (window$1.console && window$1.console.groupEnd) {\n      window$1.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n/**\n * Load a `TextTrack` from a specified url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\n\n\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  var withCredentials = track.tech_.crossOrigin() === 'use-credentials';\n\n  if (withCredentials) {\n    opts.withCredentials = withCredentials;\n  }\n\n  XHR(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log$1.error(err, response);\n    }\n\n    track.loaded_ = true; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n\n    if (typeof window$1.WebVTT !== 'function') {\n      if (track.tech_) {\n        // to prevent use before define eslint error, we define loadHandler\n        // as a let here\n        track.tech_.any(['vttjsloaded', 'vttjserror'], function (event) {\n          if (event.type === 'vttjserror') {\n            log$1.error(\"vttjs failed to load, stopping trying to process \" + track.src);\n            return;\n          }\n\n          return parseCues(responseBody, track);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\n\nvar TextTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(TextTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function TextTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings[\"default\"];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n\n    _this = _Track.call(this, settings) || this;\n    _this.tech_ = settings.tech;\n    _this.cues_ = [];\n    _this.activeCues_ = [];\n    _this.preload_ = _this.tech_.preloadTextTracks !== false;\n    var cues = new TextTrackCueList(_this.cues_);\n    var activeCues = new TextTrackCueList(_this.activeCues_);\n    var changed = false;\n    _this.timeupdateHandler = bind(_assertThisInitialized(_this), function (event) {\n      if (event === void 0) {\n        event = {};\n      }\n\n      if (this.tech_.isDisposed()) {\n        return;\n      }\n\n      if (!this.tech_.isReady_) {\n        if (event.type !== 'timeupdate') {\n          this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n        }\n\n        return;\n      } // Accessing this.activeCues for the side-effects of updating itself\n      // due to its nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n\n\n      this.activeCues = this.activeCues;\n\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n\n      if (event.type !== 'timeupdate') {\n        this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n      }\n    });\n\n    var disposeHandler = function disposeHandler() {\n      _this.stopTracking();\n    };\n\n    _this.tech_.one('dispose', disposeHandler);\n\n    if (mode !== 'disabled') {\n      _this.startTracking();\n    }\n\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof TextTrack\n       * @member {boolean} default\n       *         If this track was set to be on or off by default. Cannot be changed after\n       *         creation.\n       * @instance\n       *\n       * @readonly\n       */\n      \"default\": {\n        get: function get() {\n          return default_;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {string} mode\n       *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n       *         not be set if setting to an invalid mode.\n       * @instance\n       *\n       * @fires TextTrack#modechange\n       */\n      mode: {\n        get: function get() {\n          return mode;\n        },\n        set: function set(newMode) {\n          if (!TextTrackMode[newMode]) {\n            return;\n          }\n\n          if (mode === newMode) {\n            return;\n          }\n\n          mode = newMode;\n\n          if (!this.preload_ && mode !== 'disabled' && this.cues.length === 0) {\n            // On-demand load.\n            loadTrack(this.src, this);\n          }\n\n          this.stopTracking();\n\n          if (mode !== 'disabled') {\n            this.startTracking();\n          }\n          /**\n           * An event that fires when mode changes on this track. This allows\n           * the TextTrackList that holds this track to act accordingly.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event TextTrack#modechange\n           * @type {EventTarget~Event}\n           */\n\n\n          this.trigger('modechange');\n        }\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} cues\n       *         The text track cue list for this TextTrack.\n       * @instance\n       */\n      cues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          }\n\n          return cues;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} activeCues\n       *         The list text track cues that are currently active for this TextTrack.\n       * @instance\n       */\n      activeCues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          } // nothing to do\n\n\n          if (this.cues.length === 0) {\n            return activeCues;\n          }\n\n          var ct = this.tech_.currentTime();\n          var active = [];\n\n          for (var i = 0, l = this.cues.length; i < l; i++) {\n            var cue = this.cues[i];\n\n            if (cue.startTime <= ct && cue.endTime >= ct) {\n              active.push(cue);\n            } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n              active.push(cue);\n            }\n          }\n\n          changed = false;\n\n          if (active.length !== this.activeCues_.length) {\n            changed = true;\n          } else {\n            for (var _i = 0; _i < active.length; _i++) {\n              if (this.activeCues_.indexOf(active[_i]) === -1) {\n                changed = true;\n              }\n            }\n          }\n\n          this.activeCues_ = active;\n          activeCues.setCues_(this.activeCues_);\n          return activeCues;\n        },\n        // /!\\ Keep this setter empty (see the timeupdate handler above)\n        set: function set() {}\n      }\n    });\n\n    if (settings.src) {\n      _this.src = settings.src;\n\n      if (!_this.preload_) {\n        // Tracks will load on-demand.\n        // Act like we're loaded for other purposes.\n        _this.loaded_ = true;\n      }\n\n      if (_this.preload_ || settings.kind !== 'subtitles' && settings.kind !== 'captions') {\n        loadTrack(_this.src, _assertThisInitialized(_this));\n      }\n    } else {\n      _this.loaded_ = true;\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrack.prototype;\n\n  _proto.startTracking = function startTracking() {\n    // More precise cues based on requestVideoFrameCallback with a requestAnimationFram fallback\n    this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler); // Also listen to timeupdate in case rVFC/rAF stops (window in background, audio in video el)\n\n    this.tech_.on('timeupdate', this.timeupdateHandler);\n  };\n\n  _proto.stopTracking = function stopTracking() {\n    if (this.rvf_) {\n      this.tech_.cancelVideoFrameCallback(this.rvf_);\n      this.rvf_ = undefined;\n    }\n\n    this.tech_.off('timeupdate', this.timeupdateHandler);\n  }\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n  ;\n\n  _proto.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (cue.constructor && cue.constructor.name !== 'VTTCue') {\n      cue = new window$1.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      } // make sure that `id` is copied over\n\n\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  }\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n  ;\n\n  _proto.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(AudioTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n  function AudioTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var enabled = false;\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'enabled', {\n      get: function get() {\n        return enabled;\n      },\n      set: function set(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n\n        enabled = newEnabled;\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('enabledchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.enabled) {\n      _this.enabled = settings.enabled;\n    }\n\n    _this.loaded_ = true;\n    return _this;\n  }\n\n  return AudioTrack;\n}(Track);\n\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\nvar VideoTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(VideoTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n  function VideoTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var selected = false;\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selected', {\n      get: function get() {\n        return selected;\n      },\n      set: function set(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n\n        selected = newSelected;\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('selectedchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.selected) {\n      _this.selected = settings.selected;\n    }\n\n    return _this;\n  }\n\n  return VideoTrack;\n}(Track);\n\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\n\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(HTMLTrackElement, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function HTMLTrackElement(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var readyState;\n    var track = new TextTrack(options);\n    _this.kind = track.kind;\n    _this.src = track.src;\n    _this.srclang = track.language;\n    _this.label = track.label;\n    _this[\"default\"] = track[\"default\"];\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof HTMLTrackElement\n       * @member {HTMLTrackElement~ReadyState} readyState\n       *         The current ready state of the track element.\n       * @instance\n       */\n      readyState: {\n        get: function get() {\n          return readyState;\n        }\n      },\n\n      /**\n       * @memberof HTMLTrackElement\n       * @member {TextTrack} track\n       *         The underlying TextTrack object.\n       * @instance\n       *\n       */\n      track: {\n        get: function get() {\n          return track;\n        }\n      }\n    });\n    readyState = NONE;\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      _this.trigger({\n        type: 'load',\n        target: _assertThisInitialized(_this)\n      });\n    });\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget$2);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + \"Tracks\";\n  NORMAL[type].privateName = type + \"Tracks_\";\n});\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\n\nvar ALL = _extends({}, NORMAL, REMOTE);\n\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\n\nfunction createTrackHelper(self, kind, label, language, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var tracks = self.textTracks();\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n\n  if (language) {\n    options.language = language;\n  }\n\n  options.tech = self;\n  var track = new ALL.text.TrackClass(options);\n  tracks.addTrack(track);\n  return track;\n}\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link HTML5}\n *\n * @extends Component\n */\n\n\nvar Tech = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Tech, _Component);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Tech(options, ready) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (ready === void 0) {\n      ready = function ready() {};\n    }\n\n    // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n    options.reportTouchActivity = false;\n    _this = _Component.call(this, null, options, ready) || this;\n\n    _this.onDurationChange_ = function (e) {\n      return _this.onDurationChange(e);\n    };\n\n    _this.trackProgress_ = function (e) {\n      return _this.trackProgress(e);\n    };\n\n    _this.trackCurrentTime_ = function (e) {\n      return _this.trackCurrentTime(e);\n    };\n\n    _this.stopTrackingCurrentTime_ = function (e) {\n      return _this.stopTrackingCurrentTime(e);\n    };\n\n    _this.disposeSourceHandler_ = function (e) {\n      return _this.disposeSourceHandler(e);\n    };\n\n    _this.queuedHanders_ = new Set(); // keep track of whether the current source has played at all to\n    // implement a very limited played()\n\n    _this.hasStarted_ = false;\n\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    }); // Manually track progress in cases where the browser/tech doesn't report it.\n\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    } // Manually track timeupdates in cases where the browser/tech doesn't report it.\n\n\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options[\"native\" + track + \"Tracks\"] === false) {\n        _this[\"featuresNative\" + track + \"Tracks\"] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.preloadTextTracks = options.preloadTextTracks !== false;\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners(); // Turn on component tap events only if not using native controls\n\n\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n\n    return _this;\n  }\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  var _proto = Tech.prototype;\n\n  _proto.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  }\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n  ;\n\n  _proto.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange_);\n    this.manualProgress = true; // Trigger progress watching when a source begins loading\n\n    this.one('ready', this.trackProgress_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n  ;\n\n  _proto.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n    this.off('durationchange', this.onDurationChange_);\n  }\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n  ;\n\n  _proto.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  }\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n  ;\n\n  _proto.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  }\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  }\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n  ;\n\n  _proto.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  }\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n    this.on('play', this.trackCurrentTime_);\n    this.on('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime_);\n    this.off('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n  ;\n\n  _proto.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      }); // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  }\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n  ;\n\n  _proto.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval); // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n\n    this.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n  }\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names); // Turn off any manual progress or timeupdate tracking\n\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n  ;\n\n  _proto.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types); // clear out all tracks because we can't reuse them between techs\n\n    types.forEach(function (type) {\n      var list = _this3[type + \"Tracks\"]() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n\n        list.removeTrack(track);\n      }\n    });\n  }\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n  ;\n\n  _proto.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n      this.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.reset = function reset() {}\n  /**\n   * Get the value of `crossOrigin` from the tech.\n   *\n   * @abstract\n   *\n   * @see {Html5#crossOrigin}\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin() {}\n  /**\n   * Set the value of `crossOrigin` on the tech.\n   *\n   * @abstract\n   *\n   * @param {string} crossOrigin the crossOrigin value\n   * @see {Html5#setCrossOrigin}\n   */\n  ;\n\n  _proto.setCrossOrigin = function setCrossOrigin() {}\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n  ;\n\n  _proto.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n\n    return this.error_;\n  }\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks whether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n  ;\n\n  _proto.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n\n    return createTimeRanges();\n  }\n  /**\n   * Start playback\n   *\n   * @abstract\n   *\n   * @see {Html5#play}\n   */\n  ;\n\n  _proto.play = function play() {}\n  /**\n   * Set whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#setScrubbing}\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing() {}\n  /**\n   * Get whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#scrubbing}\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {}\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      });\n    }\n  }\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n  ;\n\n  _proto.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n      *\n      * @event Tech#audiotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n      *\n      * @event Tech#videotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n      *\n      * @event Tech#texttrackchange\n      * @type {EventTarget~Event}\n      */\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + \"trackchange\");\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  }\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n  ;\n\n  _proto.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window$1.WebVTT) {\n      return;\n    } // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n\n\n    if (document.body.contains(this.el())) {\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      } // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n\n\n      var script = document.createElement('script');\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';\n\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      }); // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n\n      window$1.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  }\n  /**\n   * Emulate texttracks\n   *\n   */\n  ;\n\n  _proto.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  }\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions$3(options, {\n      tech: this\n    });\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var _this7 = this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log$1.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    } // store HTMLTrackElement and TextTrack to remote list\n\n\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track); // remove HTMLTrackElement and TextTrack from remote list\n\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  }\n  /**\n   * Attempt to create a floating video window always on top of other windows\n   * so that users may continue consuming media while they interact with other\n   * content sites, or applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise|undefined}\n   *         A promise with a Picture-in-Picture window if the browser supports\n   *         Promises (or one was passed in as an option). It returns undefined\n   *         otherwise.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return PromiseClass.reject();\n    }\n  }\n  /**\n   * A method to check for the value of the 'disablePictureInPicture' <video> property.\n   * Defaults to true, as it should be considered disabled if the tech does not support pip\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture() {\n    return true;\n  }\n  /**\n   * A method to set or unset the 'disablePictureInPicture' <video> property.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setDisablePictureInPicture = function setDisablePictureInPicture() {}\n  /**\n   * A fallback implementation of requestVideoFrameCallback using requestAnimationFrame\n   *\n   * @param {function} cb\n   * @return {number} request id\n   */\n  ;\n\n  _proto.requestVideoFrameCallback = function requestVideoFrameCallback(cb) {\n    var _this8 = this;\n\n    var id = newGUID();\n\n    if (!this.isReady_ || this.paused()) {\n      this.queuedHanders_.add(id);\n      this.one('playing', function () {\n        if (_this8.queuedHanders_.has(id)) {\n          _this8.queuedHanders_[\"delete\"](id);\n\n          cb();\n        }\n      });\n    } else {\n      this.requestNamedAnimationFrame(id, cb);\n    }\n\n    return id;\n  }\n  /**\n   * A fallback implementation of cancelVideoFrameCallback\n   *\n   * @param {number} id id of callback to be cancelled\n   */\n  ;\n\n  _proto.cancelVideoFrameCallback = function cancelVideoFrameCallback(id) {\n    if (this.queuedHanders_.has(id)) {\n      this.queuedHanders_[\"delete\"](id);\n    } else {\n      this.cancelNamedAnimationFrame(id);\n    }\n  }\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPoster = function setPoster() {}\n  /**\n   * A method to check for the presence of the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.playsinline = function playsinline() {}\n  /**\n   * A method to set or unset the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPlaysinline = function setPlaysinline() {}\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks() {}\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks() {}\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n  ;\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the tech can support the given source\n   *\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  }\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n  ;\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  }\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n  ;\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error(\"Tech \" + name + \" must be a Tech\");\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase$1(name);\n    Tech.techs_[name] = tech;\n    Tech.techs_[toLowerCase(name)] = tech;\n\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n\n    return tech;\n  }\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requested.\n   */\n  ;\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    name = toTitleCase$1(name);\n\n    if (window$1 && window$1.videojs && window$1.videojs[name]) {\n      log$1.warn(\"The \" + name + \" tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)\");\n      return window$1.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVolumeControl = true;\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\n\nTech.prototype.featuresMuteControl = true;\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresFullscreenResize = false;\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresPlaybackRate = false;\n/**\n * Boolean indicating whether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresProgressEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresSourceset = false;\n/**\n * Boolean indicating whether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresTimeupdateEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresNativeTextTracks = false;\n/**\n * Boolean indicating whether the `Tech` supports `requestVideoFrameCallback`.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVideoFrameCallback = false;\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\n\nTech.withSourceHandlers = function (_Tech) {\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n\n\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n\n\n  var deferrable = ['seekable', 'seeking', 'duration'];\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log$1.error('No source handler found for the current source.');\n      }\n    } // Dispose any existing source handler\n\n\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler_);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.one('dispose', this.disposeSourceHandler_);\n  };\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n\n\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    } // always clean up auto-text tracks\n\n\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n}; // The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\n\n\nComponent$1.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\n\nTech.defaultTechOrder_ = [];\n\n/**\n * @file middleware.js\n * @module middleware\n */\nvar middlewares = {};\nvar middlewareInstances = {};\nvar TERMINATOR = {};\n/**\n * A middleware object is a plain JavaScript object that has methods that\n * match the {@link Tech} methods found in the lists of allowed\n * {@link module:middleware.allowedGetters|getters},\n * {@link module:middleware.allowedSetters|setters}, and\n * {@link module:middleware.allowedMediators|mediators}.\n *\n * @typedef {Object} MiddlewareObject\n */\n\n/**\n * A middleware factory function that should return a\n * {@link module:middleware~MiddlewareObject|MiddlewareObject}.\n *\n * This factory will be called for each player when needed, with the player\n * passed in as an argument.\n *\n * @callback MiddlewareFactory\n * @param {Player} player\n *        A Video.js player.\n */\n\n/**\n * Define a middleware that the player should use by way of a factory function\n * that returns a middleware object.\n *\n * @param  {string} type\n *         The MIME type to match or `\"*\"` for all MIME types.\n *\n * @param  {MiddlewareFactory} middleware\n *         A middleware factory function that will be executed for\n *         matching types.\n */\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n/**\n * Asynchronously sets a source using middleware by recursing through any\n * matching middlewares and calling `setSource` on each, passing along the\n * previous returned value each time.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n *\n * @param  {Tech~SourceObject} src\n *         A source object.\n *\n * @param  {Function}\n *         The next middleware to run.\n */\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n/**\n * When the tech is set, passes the tech to each middleware's `setTech` method.\n *\n * @param {Object[]} middleware\n *        An array of middleware instances.\n *\n * @param {Tech} tech\n *        A Video.js tech.\n */\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @return {Mixed}\n *         The final value from the tech after middleware has intercepted it.\n */\n\nfunction get(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middleware from left to right to the tech.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`.\n */\n\nfunction set(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n/**\n * Takes the argument given to the player and calls the `call` version of the\n * method on each middleware from left to right.\n *\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`, regardless of the\n *         return values of middlewares.\n */\n\nfunction mediate(middleware, tech, method, arg) {\n  if (arg === void 0) {\n    arg = null;\n  }\n\n  var callMethod = 'call' + toTitleCase$1(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR; // deprecated. The `null` return value should instead return TERMINATOR to\n  // prevent confusion if a techs method actually returns null.\n\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n  executeRight(middleware, method, returnValue, terminated);\n  return returnValue;\n}\n/**\n * Enumeration of allowed getters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  muted: 1,\n  played: 1,\n  paused: 1,\n  seekable: 1,\n  volume: 1,\n  ended: 1\n};\n/**\n * Enumeration of allowed setters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedSetters = {\n  setCurrentTime: 1,\n  setMuted: 1,\n  setVolume: 1\n};\n/**\n * Enumeration of allowed mediators where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n/**\n * Clear the middleware cache for a player.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n */\n\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n *\n * @private\n */\n\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper(src, middleware, next, player, acc, lastRun) {\n  if (src === void 0) {\n    src = {};\n  }\n\n  if (middleware === void 0) {\n    middleware = [];\n  }\n\n  if (acc === void 0) {\n    acc = [];\n  }\n\n  if (lastRun === void 0) {\n    lastRun = false;\n  }\n\n  var _middleware = middleware,\n      mwFactory = _middleware[0],\n      mwrest = _middleware.slice(1); // if mwFactory is a string, then we're at a fork in the road\n\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun); // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory); // if setSource isn't present, implicitly select this middleware\n\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      } // we've succeeded, now we need to go deeper\n\n\n      acc.push(mw); // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n\n/**\n * Mimetypes\n *\n * @see https://www.iana.org/assignments/media-types/media-types.xhtml\n * @typedef Mimetypes~Kind\n * @enum\n */\n\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  m4a: 'audio/mp4',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  caf: 'audio/x-caf',\n  flac: 'audio/flac',\n  oga: 'audio/ogg',\n  wav: 'audio/wav',\n  m3u8: 'application/x-mpegURL',\n  mpd: 'application/dash+xml',\n  jpg: 'image/jpeg',\n  jpeg: 'image/jpeg',\n  gif: 'image/gif',\n  png: 'image/png',\n  svg: 'image/svg+xml',\n  webp: 'image/webp'\n};\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\n\nvar getMimetype = function getMimetype(src) {\n  if (src === void 0) {\n    src = '';\n  }\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n  return mimetype || '';\n};\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\n\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  } // 1. check for the type in the `source` cache\n\n\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  } // 2. see if we have this source in our `currentSources` cache\n\n\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  } // 3. look for the src url in source elements and use the type there\n\n\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  } // 4. finally fallback to our list of mime types based on src url extension\n\n\n  return getMimetype(src);\n};\n\n/**\n * @module filter-source\n */\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\n\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({\n      src: src\n    })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\n\n\nfunction fixSource(src) {\n  if (!src.type) {\n    var mimetype = getMimetype(src.src);\n\n    if (mimetype) {\n      src.type = mimetype;\n    }\n  }\n\n  return src;\n}\n\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\nvar MediaLoader = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MediaLoader, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n  function MediaLoader(player, options, ready) {\n    var _this;\n\n    // MediaLoader has no element\n    var options_ = mergeOptions$3({\n      createEl: false\n    }, options);\n    _this = _Component.call(this, player, options_, ready) || this; // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase$1(j[i]);\n        var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n\n        if (!techName) {\n          tech = Component$1.getComponent(techName);\n        } // Check if the browser supports this technology\n\n\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (e.g. HTML5) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component$1);\n\nComponent$1.registerComponent('MediaLoader', MediaLoader);\n\n/**\n * Component which is clickable or keyboard actionable, but is not a\n * native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ClickableComponent, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of component options.\n   *\n   * @param  {function} [options.clickHandler]\n   *         The function to call when the button is clicked / activated\n   *\n   * @param  {string} [options.controlText]\n   *         The text to set on the button\n   *\n   * @param  {string} [options.className]\n   *         A class or space separated list of classes to add the component\n   *\n   */\n  function ClickableComponent(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (_this.options_.controlText) {\n      _this.controlText(_this.options_.controlText);\n    }\n\n    _this.handleMouseOver_ = function (e) {\n      return _this.handleMouseOver(e);\n    };\n\n    _this.handleMouseOut_ = function (e) {\n      return _this.handleMouseOut(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.emitTapEvents();\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `ClickableComponent`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = ClickableComponent.prototype;\n\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    props = assign({\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log$1.error(\"Creating a ClickableComponent with an HTML element of \" + tag + \" is not supported; use a Button instead.\");\n    } // Add ARIA attributes for clickable element which is not a native HTML button\n\n\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n    this.tabIndex_ = props.tabIndex;\n    var el = createEl(tag, props, attributes);\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    // remove controlTextEl_ on dispose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create a control text element on this `ClickableComponent`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n  ;\n\n  _proto.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n    return this.controlTextEl_;\n  }\n  /**\n   * Get or set the localize text to use for the controls on the `ClickableComponent`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.el();\n    }\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n\n    if (!this.nonIconControl && !this.player_.options_.noUITitleAttributes) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-control vjs-button \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enable this `ClickableComponent`\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n\n      this.on(['tap', 'click'], this.handleClick_);\n      this.on('keydown', this.handleKeyDown_);\n    }\n  }\n  /**\n   * Disable this `ClickableComponent`\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n\n    this.off('mouseover', this.handleMouseOver_);\n    this.off('mouseout', this.handleMouseOut_);\n    this.off(['tap', 'click'], this.handleClick_);\n    this.off('keydown', this.handleKeyDown_);\n  }\n  /**\n   * Handles language change in ClickableComponent for the player in components\n   *\n   *\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {\n    this.controlText(this.controlText_);\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `click` or `tap` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `tap` or `click` event that caused this function to be called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.options_.clickHandler) {\n      this.options_.clickHandler.call(this, arguments);\n    }\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Space or Enter, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Support Space or Enter key operation to fire a click event. Also,\n    // prevent the event from propagating through the DOM and triggering\n    // Player hotkeys.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return ClickableComponent;\n}(Component$1);\n\nComponent$1.registerComponent('ClickableComponent', ClickableComponent);\n\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(PosterImage, _ClickableComponent);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PosterImage(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n\n    _this.update();\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    };\n\n    player.on('posterchange', _this.update_);\n    return _this;\n  }\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  var _proto = PosterImage.prototype;\n\n  _proto.dispose = function dispose() {\n    this.player().off('posterchange', this.update_);\n\n    _ClickableComponent.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n    return el;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var url = this.player().poster();\n    this.setSrc(url); // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  }\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n  ;\n\n  _proto.setSrc = function setSrc(url) {\n    var backgroundImage = ''; // Any falsy value should stay as an empty string, otherwise\n    // this will throw an extra error\n\n    if (url) {\n      backgroundImage = \"url(\\\"\" + url + \"\\\")\";\n    }\n\n    this.el_.style.backgroundImage = backgroundImage;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n\n    if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n    // calling .focus() on the video element causes the video to go black,\n    // so we avoid it in that specific case\n    !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n      this.player_.tech(true).focus();\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent$1.registerComponent('PosterImage', PosterImage);\n\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\n\nfunction constructColor(color, opacity) {\n  var hex;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\n\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n    // Satisfies linter.\n    return;\n  }\n}\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\n\nvar TextTrackDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TextTrackDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n  function TextTrackDisplay(player, options, ready) {\n    var _this;\n\n    _this = _Component.call(this, player, options, ready) || this;\n\n    var updateDisplayHandler = function updateDisplayHandler(e) {\n      return _this.updateDisplay(e);\n    };\n\n    player.on('loadstart', function (e) {\n      return _this.toggleDisplay(e);\n    });\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadedmetadata', function (e) {\n      return _this.preselectTrack(e);\n    }); // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n\n    player.ready(bind(_assertThisInitialized(_this), function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n      window$1.addEventListener('orientationchange', updateDisplayHandler);\n      player.on('dispose', function () {\n        return window$1.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  var _proto = TextTrackDisplay.prototype;\n\n  _proto.preselectTrack = function preselectTrack() {\n    var modes = {\n      captions: 1,\n      subtitles: 1\n    };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc;\n    var firstCaptions;\n    var preferredTrack;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track; // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        } // clear everything if offTextTrackMenuItem was clicked\n\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track[\"default\"]) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    } // The preferredTrack matches the user preference and takes\n    // precedence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n\n\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  }\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'translate': 'yes',\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  }\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n  ;\n\n  _proto.clearDisplay = function clearDisplay() {\n    if (typeof window$1.WebVTT === 'function') {\n      window$1.WebVTT.processCues(window$1, [], this.el_);\n    }\n  }\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n    var allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;\n    this.clearDisplay();\n\n    if (allowMultipleShowingTracks) {\n      var showingTracks = [];\n\n      for (var _i = 0; _i < tracks.length; ++_i) {\n        var track = tracks[_i];\n\n        if (track.mode !== 'showing') {\n          continue;\n        }\n\n        showingTracks.push(track);\n      }\n\n      this.updateForTrack(showingTracks);\n      return;\n    } //  Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var _track = tracks[i];\n\n      if (_track.mode === 'showing') {\n        if (_track.kind === 'descriptions') {\n          descriptionsTrack = _track;\n        } else {\n          captionsSubtitlesTrack = _track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n\n      this.updateForTrack(descriptionsTrack);\n    }\n  }\n  /**\n   * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.\n   *\n   * @param {TextTrack} track\n   *        Text track object containing active cues to style.\n   */\n  ;\n\n  _proto.updateDisplayState = function updateDisplayState(track) {\n    var overrides = this.player_.textTrackSettings.getValues();\n    var cues = track.activeCues;\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = \"2px 2px 3px \" + darkGray + \", 2px 2px 4px \" + darkGray + \", 2px 2px 5px \" + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + darkGray + \", 2px 2px \" + darkGray + \", 3px 3px \" + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + lightGray + \", 0 1px \" + lightGray + \", -1px -1px \" + darkGray + \", 0 -1px \" + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = \"0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray;\n        }\n      }\n\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window$1.parseFloat(cueDiv.style.fontSize);\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n      }\n\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  }\n  /**\n   * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack|TextTrack[]} tracks\n   *        Text track object or text track array to be added to the list.\n   */\n  ;\n\n  _proto.updateForTrack = function updateForTrack(tracks) {\n    if (!Array.isArray(tracks)) {\n      tracks = [tracks];\n    }\n\n    if (typeof window$1.WebVTT !== 'function' || tracks.every(function (track) {\n      return !track.activeCues;\n    })) {\n      return;\n    }\n\n    var cues = []; // push all active track cues\n\n    for (var i = 0; i < tracks.length; ++i) {\n      var track = tracks[i];\n\n      for (var j = 0; j < track.activeCues.length; ++j) {\n        cues.push(track.activeCues[j]);\n      }\n    } // removes all cues before it processes new ones\n\n\n    window$1.WebVTT.processCues(window$1, cues, this.el_); // add unique class to each language text track & add settings styling if necessary\n\n    for (var _i2 = 0; _i2 < tracks.length; ++_i2) {\n      var _track2 = tracks[_i2];\n\n      for (var _j = 0; _j < _track2.activeCues.length; ++_j) {\n        var cueEl = _track2.activeCues[_j].displayState;\n        addClass(cueEl, 'vjs-text-track-cue');\n        addClass(cueEl, 'vjs-text-track-cue-' + (_track2.language ? _track2.language : _i2));\n\n        if (_track2.language) {\n          setAttribute(cueEl, 'lang', _track2.language);\n        }\n      }\n\n      if (this.player_.textTrackSettings) {\n        this.updateDisplayState(_track2);\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = LoadingSpinner.prototype;\n\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n  _proto.createEl = function createEl$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component$1);\n\nComponent$1.registerComponent('LoadingSpinner', LoadingSpinner);\n\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(Button, _ClickableComponent);\n\n  function Button() {\n    return _ClickableComponent.apply(this, arguments) || this;\n  }\n\n  var _proto = Button.prototype;\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    tag = 'button';\n    props = assign({\n      className: this.buildCSSClass()\n    }, props); // Add attributes for button element\n\n    attributes = assign({\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n\n    var el = createEl(tag, props, attributes);\n\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  }\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var className = this.constructor.name;\n    log$1.warn(\"Adding an actionable (user controllable) child to a Button (\" + className + \") is not supported; use a ClickableComponent instead.\"); // Avoid the error message generated by ClickableComponent's addChild method\n\n    return Component$1.prototype.addChild.call(this, child, options);\n  }\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n\n    this.el_.removeAttribute('disabled');\n  }\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n\n    this.el_.setAttribute('disabled', 'disabled');\n  }\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Ignore Space or Enter key operation, which is handled by the browser for\n    // a button - though not for its super class, ClickableComponent. Also,\n    // prevent the event from propagating through the DOM and triggering Player\n    // hotkeys. We do not preventDefault here because we _want_ the browser to\n    // handle it.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.stopPropagation();\n      return;\n    } // Pass keypress handling up for unsupported keys\n\n\n    _ClickableComponent.prototype.handleKeyDown.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent$1.registerComponent('Button', Button);\n\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  var _proto = BigPlayButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  }\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play(); // exit early if clicked via the mouse\n\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n      silencePromise(playPromise);\n\n      if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n      // calling .focus() on the video element causes the video to go black,\n      // so we avoid it in that specific case\n      !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n        this.player_.tech(true).focus();\n      }\n\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.tech(true).focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyDown.call(this, event);\n  };\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\nComponent$1.registerComponent('BigPlayButton', BigPlayButton);\n\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(CloseButton, _Button);\n\n  /**\n  * Creates an instance of the this class.\n  *\n  * @param  {Player} player\n  *         The `Player` that this class should be attached to.\n  *\n  * @param  {Object} [options]\n  *         The key/value store of player options.\n  */\n  function CloseButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n\n    return _this;\n  }\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n\n\n  var _proto = CloseButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-close-button \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when\n   * this will be triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({\n      type: 'close',\n      bubbles: false\n    });\n  }\n  /**\n   * Event handler that is called when a `CloseButton` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Esc, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Esc button will trigger `click` event\n    if (keycode.isEventKey(event, 'Esc')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Button.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent$1.registerComponent('CloseButton', CloseButton);\n\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PlayToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function PlayToggle(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Button.call(this, player, options) || this; // show or hide replay icon\n\n    options.replay = options.replay === undefined || options.replay;\n\n    _this.on(player, 'play', function (e) {\n      return _this.handlePlay(e);\n    });\n\n    _this.on(player, 'pause', function (e) {\n      return _this.handlePause(e);\n    });\n\n    if (options.replay) {\n      _this.on(player, 'ended', function (e) {\n        return _this.handleEnded(e);\n      });\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PlayToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-play-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  }\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // change the button text to \"Pause\"\n\n    this.controlText('Pause');\n  }\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n  ;\n\n  _proto.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused'); // change the button text to \"Play\"\n\n    this.controlText('Play');\n  }\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    var _this2 = this;\n\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended'); // change the button text to \"Replay\"\n\n    this.controlText('Replay'); // on the next seek remove the replay button\n\n    this.one(this.player_, 'seeked', function (e) {\n      return _this2.handleSeeked(e);\n    });\n  };\n\n  return PlayToggle;\n}(Button);\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\nComponent$1.registerComponent('PlayToggle', PlayToggle);\n\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in\n * seconds) will force a number of leading zeros to cover the length of the\n * guide.\n *\n * @private\n * @param  {number} seconds\n *         Number of seconds to be turned into a string\n *\n * @param  {number} guide\n *         Number (in seconds) to model the string after\n *\n * @return {string}\n *         Time formatted as H:MM:SS or M:SS\n */\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600); // handle invalid times\n\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  } // Check if we need to show hours\n\n\n  h = h > 0 || gh > 0 ? h + ':' : ''; // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':'; // Check if leading zero is need for seconds\n\n  s = s < 10 ? '0' + s : s;\n  return h + m + s;\n}; // Internal pointer to the current implementation.\n\n\nvar implementation = defaultImplementation;\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime\n *        implementation. Will receive the current time in seconds and the\n *        guide (in seconds) as arguments.\n */\n\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n/**\n * Resets formatTime to the default implementation.\n */\n\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n/**\n * Delegates to either the default time formatting function or a custom\n * function supplied via `setFormatTime`.\n *\n * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a\n * guide (in seconds) will force a number of leading zeros to cover the\n * length of the guide.\n *\n * @static\n * @example  formatTime(125, 600) === \"02:05\"\n * @param    {number} seconds\n *           Number of seconds to be turned into a string\n *\n * @param    {number} guide\n *           Number (in seconds) to model the string after\n *\n * @return   {string}\n *           Time formatted as H:MM:SS or M:SS\n */\n\nfunction formatTime(seconds, guide) {\n  if (guide === void 0) {\n    guide = seconds;\n  }\n\n  return implementation(seconds, guide);\n}\n\n/**\n * Displays time information about the video\n *\n * @extends Component\n */\n\nvar TimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.on(player, ['timeupdate', 'ended'], function (e) {\n      return _this.updateContent(e);\n    });\n\n    _this.updateTextNode_();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var className = this.buildCSSClass();\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + \" vjs-time-control vjs-control\"\n    });\n\n    var span = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize(this.labelText_) + \"\\xA0\"\n    }, {\n      role: 'presentation'\n    });\n    el.appendChild(span);\n    this.contentEl_ = createEl('span', {\n      className: className + \"-display\"\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off',\n      // span elements have no implicit role, but some screen readers (notably VoiceOver)\n      // treat them as a break between items in the DOM when using arrow keys\n      // (or left-to-right swipes on iOS) to read contents of a page. Using\n      // role='presentation' causes VoiceOver to NOT treat this span as a break.\n      'role': 'presentation'\n    });\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Updates the time display text node with a new time\n   *\n   * @param {number} [time=0] the time to update to\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateTextNode_ = function updateTextNode_(time) {\n    var _this2 = this;\n\n    if (time === void 0) {\n      time = 0;\n    }\n\n    time = formatTime(time);\n\n    if (this.formattedTime_ === time) {\n      return;\n    }\n\n    this.formattedTime_ = time;\n    this.requestNamedAnimationFrame('TimeDisplay#updateTextNode_', function () {\n      if (!_this2.contentEl_) {\n        return;\n      }\n\n      var oldNode = _this2.textNode_;\n\n      if (oldNode && _this2.contentEl_.firstChild !== oldNode) {\n        oldNode = null;\n        log$1.warn('TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.');\n      }\n\n      _this2.textNode_ = document.createTextNode(_this2.formattedTime_);\n\n      if (!_this2.textNode_) {\n        return;\n      }\n\n      if (oldNode) {\n        _this2.contentEl_.replaceChild(_this2.textNode_, oldNode);\n      } else {\n        _this2.contentEl_.appendChild(_this2.textNode_);\n      }\n    });\n  }\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component$1);\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nTimeDisplay.prototype.controlText_ = 'Time';\nComponent$1.registerComponent('TimeDisplay', TimeDisplay);\n\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(CurrentTimeDisplay, _TimeDisplay);\n\n  function CurrentTimeDisplay() {\n    return _TimeDisplay.apply(this, arguments) || this;\n  }\n\n  var _proto = CurrentTimeDisplay.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  }\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time;\n\n    if (this.player_.ended()) {\n      time = this.player_.duration();\n    } else {\n      time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\nComponent$1.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(DurationDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function DurationDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    var updateContent = function updateContent(e) {\n      return _this.updateContent(e);\n    }; // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n\n\n    _this.on(player, 'durationchange', updateContent); // Listen to loadstart because the player duration is reset when a new media element is loaded,\n    // but the durationchange on the user agent will not fire.\n    // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n\n    _this.on(player, 'loadstart', updateContent); // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n\n\n    _this.on(player, 'loadedmetadata', updateContent);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = DurationDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  }\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n    this.updateTextNode_(duration);\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nDurationDisplay.prototype.controlText_ = 'Duration';\nComponent$1.registerComponent('DurationDisplay', DurationDisplay);\n\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDivider, _Component);\n\n  function TimeDivider() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = TimeDivider.prototype;\n\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider'\n    }, {\n      // this element and its contents can be hidden from assistive techs since\n      // it is made extraneous by the announcement of the control text\n      // for the current time and duration displays\n      'aria-hidden': true\n    });\n\n    var div = _Component.prototype.createEl.call(this, 'div');\n\n    var span = _Component.prototype.createEl.call(this, 'span', {\n      textContent: '/'\n    });\n\n    div.appendChild(span);\n    el.appendChild(div);\n    return el;\n  };\n\n  return TimeDivider;\n}(Component$1);\n\nComponent$1.registerComponent('TimeDivider', TimeDivider);\n\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(RemainingTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function RemainingTimeDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    _this.on(player, 'durationchange', function (e) {\n      return _this.updateContent(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = RemainingTimeDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  }\n  /**\n   * Create the `Component`'s DOM element with the \"minus\" characted prepend to the time\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = _TimeDisplay.prototype.createEl.call(this);\n\n    if (this.options_.displayNegative !== false) {\n      el.insertBefore(createEl('span', {}, {\n        'aria-hidden': true\n      }, '-'), this.contentEl_);\n    }\n\n    return el;\n  }\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    if (typeof this.player_.duration() !== 'number') {\n      return;\n    }\n\n    var time; // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n\n    if (this.player_.ended()) {\n      time = 0;\n    } else if (this.player_.remainingTimeDisplay) {\n      time = this.player_.remainingTimeDisplay();\n    } else {\n      time = this.player_.remainingTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\nComponent$1.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LiveDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.updateShowing();\n\n    _this.on(_this.player(), 'durationchange', function (e) {\n      return _this.updateShowing(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LiveDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display'\n    }, {\n      'aria-live': 'off'\n    });\n    this.contentEl_.appendChild(createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('Stream Type') + \"\\xA0\"\n    }));\n    this.contentEl_.appendChild(document.createTextNode(this.localize('LIVE')));\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('LiveDisplay', LiveDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar SeekToLive = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(SeekToLive, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekToLive(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.updateLiveEdgeStatus();\n\n    if (_this.player_.liveTracker) {\n      _this.updateLiveEdgeStatusHandler_ = function (e) {\n        return _this.updateLiveEdgeStatus(e);\n      };\n\n      _this.on(_this.player_.liveTracker, 'liveedgechange', _this.updateLiveEdgeStatusHandler_);\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = SeekToLive.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Button.prototype.createEl.call(this, 'button', {\n      className: 'vjs-seek-to-live-control vjs-control'\n    });\n\n    this.textEl_ = createEl('span', {\n      className: 'vjs-seek-to-live-text',\n      textContent: this.localize('LIVE')\n    }, {\n      'aria-hidden': 'true'\n    });\n    el.appendChild(this.textEl_);\n    return el;\n  }\n  /**\n   * Update the state of this button if we are at the live edge\n   * or not\n   */\n  ;\n\n  _proto.updateLiveEdgeStatus = function updateLiveEdgeStatus() {\n    // default to live edge\n    if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {\n      this.setAttribute('aria-disabled', true);\n      this.addClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently playing live');\n    } else {\n      this.setAttribute('aria-disabled', false);\n      this.removeClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently behind live');\n    }\n  }\n  /**\n   * On click bring us as near to the live point as possible.\n   * This requires that we wait for the next `live-seekable-change`\n   * event which will happen every segment length seconds.\n   */\n  ;\n\n  _proto.handleClick = function handleClick() {\n    this.player_.liveTracker.seekToLiveEdge();\n  }\n  /**\n   * Dispose of the element and stop tracking\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);\n    }\n\n    this.textEl_ = null;\n\n    _Button.prototype.dispose.call(this);\n  };\n\n  return SeekToLive;\n}(Button);\n\nSeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';\nComponent$1.registerComponent('SeekToLive', SeekToLive);\n\n/**\n * Keep a number between a min and a max value\n *\n * @param {number} number\n *        The number to clamp\n *\n * @param {number} min\n *        The minimum value\n * @param {number} max\n *        The maximum value\n *\n * @return {number}\n *         the clamped number\n */\nvar clamp = function clamp(number, min, max) {\n  number = Number(number);\n  return Math.min(max, Math.max(min, isNaN(number) ? min : number));\n};\n\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Slider, _Component);\n\n  /**\n  * Create an instance of this class\n  *\n  * @param {Player} player\n  *        The `Player` that this class should be attached to.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  */\n  function Slider(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleMouseDown_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.handleMouseUp_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMouseMove_ = function (e) {\n      return _this.handleMouseMove(e);\n    };\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    }; // Set property names to bar to match with the child Slider class is looking for\n\n\n    _this.bar = _this.getChild(_this.options_.barName); // Set a horizontal or vertical class on the slider depending on the slider type\n\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  var _proto = Slider.prototype;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown_);\n    this.on('touchstart', this.handleMouseDown_);\n    this.on('keydown', this.handleKeyDown_);\n    this.on('click', this.handleClick_); // TODO: deprecated, controlsvisible does not seem to be fired\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n    this.enabled_ = true;\n  }\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n  ;\n\n  _proto.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n\n    var doc = this.bar.el_.ownerDocument;\n    this.off('mousedown', this.handleMouseDown_);\n    this.off('touchstart', this.handleMouseDown_);\n    this.off('keydown', this.handleKeyDown_);\n    this.off('click', this.handleClick_);\n    this.off(this.player_, 'controlsvisible', this.update_);\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.removeAttribute('tabindex');\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n\n    this.enabled_ = false;\n  }\n  /**\n   * Create the `Slider`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl(type, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    // Add the slider element class to all sub classes\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    } // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n\n\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n\n    blockTextSelection();\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('slideractive');\n    this.on(doc, 'mousemove', this.handleMouseMove_);\n    this.on(doc, 'mouseup', this.handleMouseUp_);\n    this.on(doc, 'touchmove', this.handleMouseMove_);\n    this.on(doc, 'touchend', this.handleMouseUp_);\n    this.handleMouseMove(event, true);\n  }\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false.\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {}\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n    unblockTextSelection();\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('sliderinactive');\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.update();\n  }\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @return {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n  ;\n\n  _proto.update = function update() {\n    var _this2 = this;\n\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    // If there's no bar...\n    if (!this.el_ || !this.bar) {\n      return;\n    } // clamp progress between 0 and 1\n    // and only round to four decimal places, as we round to two below\n\n\n    var progress = this.getProgress();\n\n    if (progress === this.progress_) {\n      return progress;\n    }\n\n    this.progress_ = progress;\n    this.requestNamedAnimationFrame('Slider#update', function () {\n      // Set the new bar width or height\n      var sizeKey = _this2.vertical() ? 'height' : 'width'; // Convert to a percentage for css value\n\n      _this2.bar.el().style[sizeKey] = (progress * 100).toFixed(2) + '%';\n    });\n    return progress;\n  }\n  /**\n   * Get the percentage of the bar that should be filled\n   * but clamped and rounded.\n   *\n   * @return {number}\n   *         percentage filled that the slider is\n   */\n  ;\n\n  _proto.getProgress = function getProgress() {\n    return Number(clamp(this.getPercent(), 0, 1).toFixed(4));\n  }\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - position.x for vertical `Slider`s\n   *         - position.y for horizontal `Slider`s\n   */\n  ;\n\n  _proto.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n\n    return position.x;\n  }\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward();\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    event.stopPropagation();\n    event.preventDefault();\n  }\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n  ;\n\n  _proto.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component$1);\n\nComponent$1.registerComponent('Slider', Slider);\n\nvar percentify = function percentify(time, end) {\n  return clamp(time / end * 100, 0, 100).toFixed(2) + '%';\n};\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\n\nvar LoadProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LoadProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.partEls_ = [];\n\n    _this.on(player, 'progress', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LoadProgressBar.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress'\n    });\n\n    var wrapper = createEl('span', {\n      className: 'vjs-control-text'\n    });\n    var loadedText = createEl('span', {\n      textContent: this.localize('Loaded')\n    });\n    var separator = document.createTextNode(': ');\n    this.percentageEl_ = createEl('span', {\n      className: 'vjs-control-text-loaded-percentage',\n      textContent: '0%'\n    });\n    el.appendChild(wrapper);\n    wrapper.appendChild(loadedText);\n    wrapper.appendChild(separator);\n    wrapper.appendChild(this.percentageEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.partEls_ = null;\n    this.percentageEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('LoadProgressBar#update', function () {\n      var liveTracker = _this2.player_.liveTracker;\n\n      var buffered = _this2.player_.buffered();\n\n      var duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : _this2.player_.duration();\n\n      var bufferedEnd = _this2.player_.bufferedEnd();\n\n      var children = _this2.partEls_;\n      var percent = percentify(bufferedEnd, duration);\n\n      if (_this2.percent_ !== percent) {\n        // update the width of the progress bar\n        _this2.el_.style.width = percent; // update the control-text\n\n        textContent(_this2.percentageEl_, percent);\n        _this2.percent_ = percent;\n      } // add child elements to represent the individual buffered time ranges\n\n\n      for (var i = 0; i < buffered.length; i++) {\n        var start = buffered.start(i);\n        var end = buffered.end(i);\n        var part = children[i];\n\n        if (!part) {\n          part = _this2.el_.appendChild(createEl());\n          children[i] = part;\n        } //  only update if changed\n\n\n        if (part.dataset.start === start && part.dataset.end === end) {\n          continue;\n        }\n\n        part.dataset.start = start;\n        part.dataset.end = end; // set the percent based on the width of the progress bar (bufferedEnd)\n\n        part.style.left = percentify(start, bufferedEnd);\n        part.style.width = percentify(end - start, bufferedEnd);\n      } // remove unused buffered range elements\n\n\n      for (var _i = children.length; _i > buffered.length; _i--) {\n        _this2.el_.removeChild(children[_i - 1]);\n      }\n\n      children.length = buffered.length;\n    });\n  };\n\n  return LoadProgressBar;\n}(Component$1);\n\nComponent$1.registerComponent('LoadProgressBar', LoadProgressBar);\n\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = findPosition(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint; // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n\n    if (!playerRect || !tooltipRect) {\n      return;\n    } // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n\n\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx; // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right); // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n\n    var pullTooltipBy = tooltipRect.width / 2; // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    } // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n\n\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    } // prevent small width fluctuations within 0.4px from\n    // changing the value below.\n    // This really helps for live to prevent the play\n    // progress time tooltip from jittering\n\n\n    pullTooltipBy = Math.round(pullTooltipBy);\n    this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    this.write(content);\n  }\n  /**\n   * Write the time to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted time for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   *\n   * @param {number} time\n   *        The time to update the tooltip to, not used during live playback\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateTime = function updateTime(seekBarRect, seekBarPoint, time, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('TimeTooltip#updateTime', function () {\n      var content;\n\n      var duration = _this2.player_.duration();\n\n      if (_this2.player_.liveTracker && _this2.player_.liveTracker.isLive()) {\n        var liveWindow = _this2.player_.liveTracker.liveWindow();\n\n        var secondsBehind = liveWindow - seekBarPoint * liveWindow;\n        content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);\n      } else {\n        content = formatTime(time, duration);\n      }\n\n      _this2.update(seekBarRect, seekBarPoint, content);\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return TimeTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('TimeTooltip', TimeTooltip);\n\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(PlayProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlayProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlayProgressBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var timeTooltip = this.getChild('timeTooltip');\n\n    if (!timeTooltip) {\n      return;\n    }\n\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    timeTooltip.updateTime(seekBarRect, seekBarPoint, time);\n  };\n\n  return PlayProgressBar;\n}(Component$1);\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n}; // Time tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent$1.registerComponent('PlayProgressBar', PlayProgressBar);\n\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseTimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseTimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseTimeDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    var time = seekBarPoint * this.player_.duration();\n    this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, function () {\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + \"px\";\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component$1);\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\nComponent$1.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\nvar STEP_SECONDS = 5; // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.\n\nvar PAGE_KEY_MULTIPLIER = 12;\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(SeekBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.setEventHandlers_();\n\n    return _this;\n  }\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  var _proto = SeekBar.prototype;\n\n  _proto.setEventHandlers_ = function setEventHandlers_() {\n    var _this2 = this;\n\n    this.update_ = bind(this, this.update);\n    this.update = throttle(this.update_, UPDATE_REFRESH_INTERVAL);\n    this.on(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.on(this.player_.liveTracker, 'liveedgechange', this.update);\n    } // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n\n\n    this.updateInterval = null;\n\n    this.enableIntervalHandler_ = function (e) {\n      return _this2.enableInterval_(e);\n    };\n\n    this.disableIntervalHandler_ = function (e) {\n      return _this2.disableInterval_(e);\n    };\n\n    this.on(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.on(document, 'visibilitychange', this.toggleVisibility_);\n    }\n  };\n\n  _proto.toggleVisibility_ = function toggleVisibility_(e) {\n    if (document.visibilityState === 'hidden') {\n      this.cancelNamedAnimationFrame('SeekBar#update');\n      this.cancelNamedAnimationFrame('Slider#update');\n      this.disableInterval_(e);\n    } else {\n      if (!this.player_.ended() && !this.player_.paused()) {\n        this.enableInterval_();\n      } // we just switched back to the page and someone may be looking, so, update ASAP\n\n\n      this.update();\n    }\n  };\n\n  _proto.enableInterval_ = function enableInterval_() {\n    if (this.updateInterval) {\n      return;\n    }\n\n    this.updateInterval = this.setInterval(this.update, UPDATE_REFRESH_INTERVAL);\n  };\n\n  _proto.disableInterval_ = function disableInterval_(e) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e && e.type !== 'ended') {\n      return;\n    }\n\n    if (!this.updateInterval) {\n      return;\n    }\n\n    this.clearInterval(this.updateInterval);\n    this.updateInterval = null;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  }\n  /**\n   * This function updates the play progress bar and accessibility\n   * attributes to whatever is passed in.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @return {number}\n   *          The current percent at a number from 0-1\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this3 = this;\n\n    // ignore updates while the tab is hidden\n    if (document.visibilityState === 'hidden') {\n      return;\n    }\n\n    var percent = _Slider.prototype.update.call(this);\n\n    this.requestNamedAnimationFrame('SeekBar#update', function () {\n      var currentTime = _this3.player_.ended() ? _this3.player_.duration() : _this3.getCurrentTime_();\n      var liveTracker = _this3.player_.liveTracker;\n\n      var duration = _this3.player_.duration();\n\n      if (liveTracker && liveTracker.isLive()) {\n        duration = _this3.player_.liveTracker.liveCurrentTime();\n      }\n\n      if (_this3.percent_ !== percent) {\n        // machine readable value of progress bar (percentage complete)\n        _this3.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n\n        _this3.percent_ = percent;\n      }\n\n      if (_this3.currentTime_ !== currentTime || _this3.duration_ !== duration) {\n        // human readable value of progress bar (time complete)\n        _this3.el_.setAttribute('aria-valuetext', _this3.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n\n        _this3.currentTime_ = currentTime;\n        _this3.duration_ = duration;\n      } // update the progress bar time tooltip with the current time\n\n\n      if (_this3.bar) {\n        _this3.bar.update(getBoundingClientRect(_this3.el()), _this3.getProgress());\n      }\n    });\n    return percent;\n  }\n  /**\n   * Prevent liveThreshold from causing seeks to seem like they\n   * are not happening from a user perspective.\n   *\n   * @param {number} ct\n   *        current time to seek to\n   */\n  ;\n\n  _proto.userSeek_ = function userSeek_(ct) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {\n      this.player_.liveTracker.nextSeekedFromUser();\n    }\n\n    this.player_.currentTime(ct);\n  }\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n  ;\n\n  _proto.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  }\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    var currentTime = this.getCurrentTime_();\n    var percent;\n    var liveTracker = this.player_.liveTracker;\n\n    if (liveTracker && liveTracker.isLive()) {\n      percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow(); // prevent the percent from changing at the live edge\n\n      if (liveTracker.atLiveEdge()) {\n        percent = 1;\n      }\n    } else {\n      percent = currentTime / this.player_.duration();\n    }\n\n    return percent;\n  }\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    } // Stop event propagation to prevent double fire in progress-control.js\n\n\n    event.stopPropagation();\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event, mouseDown) {\n    if (mouseDown === void 0) {\n      mouseDown = false;\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    if (!mouseDown && !this.player_.scrubbing()) {\n      this.player_.scrubbing(true);\n    }\n\n    var newTime;\n    var distance = this.calculateDistance(event);\n    var liveTracker = this.player_.liveTracker;\n\n    if (!liveTracker || !liveTracker.isLive()) {\n      newTime = distance * this.player_.duration(); // Don't let video end while scrubbing.\n\n      if (newTime === this.player_.duration()) {\n        newTime = newTime - 0.1;\n      }\n    } else {\n      if (distance >= 0.99) {\n        liveTracker.seekToLiveEdge();\n        return;\n      }\n\n      var seekableStart = liveTracker.seekableStart();\n      var seekableEnd = liveTracker.liveCurrentTime();\n      newTime = seekableStart + distance * liveTracker.liveWindow(); // Don't let video end while scrubbing.\n\n      if (newTime >= seekableEnd) {\n        newTime = seekableEnd;\n      } // Compensate for precision differences so that currentTime is not less\n      // than seekable start\n\n\n      if (newTime <= seekableStart) {\n        newTime = seekableStart + 0.1;\n      } // On android seekableEnd can be Infinity sometimes,\n      // this will cause newTime to be Infinity, which is\n      // not a valid currentTime.\n\n\n      if (newTime === Infinity) {\n        return;\n      }\n    } // Set new time (tell player to seek to new time)\n\n\n    this.userSeek_(newTime);\n  };\n\n  _proto.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  _proto.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  }\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event); // Stop event propagation to prevent double fire in progress-control.js\n\n\n    if (event) {\n      event.stopPropagation();\n    }\n\n    this.player_.scrubbing(false);\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n\n    this.player_.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    } else {\n      // We're done seeking and the time has changed.\n      // If the player is paused, make sure we display the correct time on the seek bar.\n      this.update_();\n    }\n  }\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.userSeek_(this.player_.currentTime() + STEP_SECONDS);\n  }\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.userSeek_(this.player_.currentTime() - STEP_SECONDS);\n  }\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n  ;\n\n  _proto.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down.\n   * Supports the following keys:\n   *\n   *   Space or Enter key fire a click event\n   *   Home key moves to start of the timeline\n   *   End key moves to end of the timeline\n   *   Digit \"0\" through \"9\" keys move to 0%, 10% ... 80%, 90% of the timeline\n   *   PageDown key moves back a larger step than ArrowDown\n   *   PageUp key moves forward a large step\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var liveTracker = this.player_.liveTracker;\n\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.handleAction(event);\n    } else if (keycode.isEventKey(event, 'Home')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(0);\n    } else if (keycode.isEventKey(event, 'End')) {\n      event.preventDefault();\n      event.stopPropagation();\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.liveCurrentTime());\n      } else {\n        this.userSeek_(this.player_.duration());\n      }\n    } else if (/^[0-9]$/.test(keycode(event))) {\n      event.preventDefault();\n      event.stopPropagation();\n      var gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.seekableStart() + liveTracker.liveWindow() * gotoFraction);\n      } else {\n        this.userSeek_(this.player_.duration() * gotoFraction);\n      }\n    } else if (keycode.isEventKey(event, 'PgDn')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else if (keycode.isEventKey(event, 'PgUp')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Slider.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.disableInterval_();\n    this.off(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.update);\n    }\n\n    this.off(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.off(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.off(document, 'visibilitychange', this.toggleVisibility_);\n    }\n\n    _Slider.prototype.dispose.call(this);\n  };\n\n  return SeekBar;\n}(Slider);\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n}; // MouseTimeDisplay tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\nComponent$1.registerComponent('SeekBar', SeekBar);\n\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ProgressControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ProgressControl(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.handleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n    _this.throttledHandleMouseSeek = throttle(bind(_assertThisInitialized(_this), _this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleMouseDownHandler_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = ProgressControl.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  }\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (!seekBar) {\n      return;\n    }\n\n    var playProgressBar = seekBar.getChild('playProgressBar');\n    var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n\n    if (!playProgressBar && !mouseTimeDisplay) {\n      return;\n    }\n\n    var seekBarEl = seekBar.el();\n    var seekBarRect = findPosition(seekBarEl);\n    var seekBarPoint = getPointerPosition(seekBarEl, event).x; // The default skin has a gap on either side of the `SeekBar`. This means\n    // that it's possible to trigger this behavior outside the boundaries of\n    // the `SeekBar`. This ensures we stay within it at all times.\n\n    seekBarPoint = clamp(seekBarPoint, 0, 1);\n\n    if (mouseTimeDisplay) {\n      mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n    }\n\n    if (playProgressBar) {\n      playProgressBar.update(seekBarRect, seekBar.getProgress());\n    }\n  }\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  }\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n  ;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Disable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeListenersAddedOnMousedownAndTouchstart();\n    this.addClass('disabled');\n    this.enabled_ = false; // Restore normal playback state if controls are disabled while scrubbing\n\n    if (this.player_.scrubbing()) {\n      var seekBar = this.getChild('seekBar');\n      this.player_.scrubbing(false);\n\n      if (seekBar.videoWasPlaying) {\n        silencePromise(this.player_.play());\n      }\n    }\n  }\n  /**\n   * Enable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n    this.enabled_ = true;\n  }\n  /**\n   * Cleanup listeners after the user finishes interacting with the progress controls\n   */\n  ;\n\n  _proto.removeListenersAddedOnMousedownAndTouchstart = function removeListenersAddedOnMousedownAndTouchstart() {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.removeListenersAddedOnMousedownAndTouchstart();\n  };\n\n  return ProgressControl;\n}(Component$1);\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\nComponent$1.registerComponent('ProgressControl', ProgressControl);\n\n/**\n * Toggle Picture-in-Picture mode\n *\n * @extends Button\n */\n\nvar PictureInPictureToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PictureInPictureToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  function PictureInPictureToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], function (e) {\n      return _this.handlePictureInPictureChange(e);\n    });\n\n    _this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], function (e) {\n      return _this.handlePictureInPictureEnabledChange(e);\n    });\n\n    _this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], function () {\n      // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time\n      var isSourceAudio = player.currentType().substring(0, 5) === 'audio';\n\n      if (isSourceAudio || player.audioPosterMode() || player.audioOnlyMode()) {\n        if (player.isInPictureInPicture()) {\n          player.exitPictureInPicture();\n        }\n\n        _this.hide();\n      } else {\n        _this.show();\n      }\n    }); // TODO: Deactivate button on player emptied event.\n\n\n    _this.disable();\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PictureInPictureToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-picture-in-picture-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enables or disables button based on document.pictureInPictureEnabled property value\n   * or on value returned by player.disablePictureInPicture() method.\n   */\n  ;\n\n  _proto.handlePictureInPictureEnabledChange = function handlePictureInPictureEnabledChange() {\n    if (document.pictureInPictureEnabled && this.player_.disablePictureInPicture() === false) {\n      this.enable();\n    } else {\n      this.disable();\n    }\n  }\n  /**\n   * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  ;\n\n  _proto.handlePictureInPictureChange = function handlePictureInPictureChange(event) {\n    if (this.player_.isInPictureInPicture()) {\n      this.controlText('Exit Picture-in-Picture');\n    } else {\n      this.controlText('Picture-in-Picture');\n    }\n\n    this.handlePictureInPictureEnabledChange();\n  }\n  /**\n   * This gets called when an `PictureInPictureToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isInPictureInPicture()) {\n      this.player_.requestPictureInPicture();\n    } else {\n      this.player_.exitPictureInPicture();\n    }\n  };\n\n  return PictureInPictureToggle;\n}(Button);\n/**\n * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';\nComponent$1.registerComponent('PictureInPictureToggle', PictureInPictureToggle);\n\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(FullscreenToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function FullscreenToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, 'fullscreenchange', function (e) {\n      return _this.handleFullscreenChange(e);\n    });\n\n    if (document[player.fsApi_.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = FullscreenToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-fullscreen-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  }\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\nComponent$1.registerComponent('FullscreenToggle', FullscreenToggle);\n\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\nvar VolumeLevel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = VolumeLevel.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level'\n    });\n\n    el.appendChild(_Component.prototype.createEl.call(this, 'span', {\n      className: 'vjs-control-text'\n    }));\n    return el;\n  };\n\n  return VolumeLevel;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevel', VolumeLevel);\n\n/**\n * Volume level tooltips display a volume above or side by side the volume bar.\n *\n * @extends Component\n */\n\nvar VolumeLevelTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevelTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeLevelTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the volume tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeLevelTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the tooltip relative to the `VolumeBar` and\n   * its content text.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical, content) {\n    if (!vertical) {\n      var tooltipRect = getBoundingClientRect(this.el_);\n      var playerRect = getBoundingClientRect(this.player_.el());\n      var volumeBarPointPx = rangeBarRect.width * rangeBarPoint;\n\n      if (!playerRect || !tooltipRect) {\n        return;\n      }\n\n      var spaceLeftOfPoint = rangeBarRect.left - playerRect.left + volumeBarPointPx;\n      var spaceRightOfPoint = rangeBarRect.width - volumeBarPointPx + (playerRect.right - rangeBarRect.right);\n      var pullTooltipBy = tooltipRect.width / 2;\n\n      if (spaceLeftOfPoint < pullTooltipBy) {\n        pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n      } else if (spaceRightOfPoint < pullTooltipBy) {\n        pullTooltipBy = spaceRightOfPoint;\n      }\n\n      if (pullTooltipBy < 0) {\n        pullTooltipBy = 0;\n      } else if (pullTooltipBy > tooltipRect.width) {\n        pullTooltipBy = tooltipRect.width;\n      }\n\n      this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    }\n\n    this.write(content + \"%\");\n  }\n  /**\n   * Write the volume to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted volume for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the volume tooltip relative to the `VolumeBar`.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   * @param {number} volume\n   *        The volume level to update the tooltip to\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateVolume = function updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('VolumeLevelTooltip#updateVolume', function () {\n      _this2.update(rangeBarRect, rangeBarPoint, vertical, volume.toFixed(0));\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return VolumeLevelTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevelTooltip', VolumeLevelTooltip);\n\n/**\n * The {@link MouseVolumeLevelDisplay} component tracks mouse movement over the\n * {@link VolumeControl}. It displays an indicator and a {@link VolumeLevelTooltip}\n * indicating the volume level which is represented by a given point in the\n * {@link VolumeBar}.\n *\n * @extends Component\n */\n\nvar MouseVolumeLevelDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseVolumeLevelDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseVolumeLevelDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseVolumeLevelDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enquires updates to its own DOM as well as the DOM of its\n   * {@link VolumeLevelTooltip} child.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical) {\n    var _this2 = this;\n\n    var volume = 100 * rangeBarPoint;\n    this.getChild('volumeLevelTooltip').updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, function () {\n      if (vertical) {\n        _this2.el_.style.bottom = rangeBarRect.height * rangeBarPoint + \"px\";\n      } else {\n        _this2.el_.style.left = rangeBarRect.width * rangeBarPoint + \"px\";\n      }\n    });\n  };\n\n  return MouseVolumeLevelDisplay;\n}(Component$1);\n/**\n * Default options for `MouseVolumeLevelDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseVolumeLevelDisplay.prototype.options_ = {\n  children: ['volumeLevelTooltip']\n};\nComponent$1.registerComponent('MouseVolumeLevelDisplay', MouseVolumeLevelDisplay);\n\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(VolumeBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.on('slideractive', function (e) {\n      return _this.updateLastVolume_(e);\n    });\n\n    _this.on(player, 'volumechange', function (e) {\n      return _this.updateARIAAttributes(e);\n    });\n\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  }\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var mouseVolumeLevelDisplay = this.getChild('mouseVolumeLevelDisplay');\n\n    if (mouseVolumeLevelDisplay) {\n      var volumeBarEl = this.el();\n      var volumeBarRect = getBoundingClientRect(volumeBarEl);\n      var vertical = this.vertical();\n      var volumeBarPoint = getPointerPosition(volumeBarEl, event);\n      volumeBarPoint = vertical ? volumeBarPoint.y : volumeBarPoint.x; // The default skin has a gap on either side of the `VolumeBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `VolumeBar`. This ensures we stay within it at all times.\n\n      volumeBarPoint = clamp(volumeBarPoint, 0, 1);\n      mouseVolumeLevelDisplay.update(volumeBarRect, volumeBarPoint, vertical);\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  }\n  /**\n   * If the player is muted unmute it.\n   */\n  ;\n\n  _proto.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  }\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n\n    return this.player_.volume();\n  }\n  /**\n   * Increase volume level for keyboard users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  }\n  /**\n   * Decrease volume level for keyboard users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  }\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  }\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n  ;\n\n  _proto.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  }\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n  ;\n\n  _proto.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n}; // MouseVolumeLevelDisplay tooltip should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  VolumeBar.prototype.options_.children.splice(0, 0, 'mouseVolumeLevelDisplay');\n}\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\n\n\nVolumeBar.prototype.playerEvent = 'volumechange';\nComponent$1.registerComponent('VolumeBar', VolumeBar);\n\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumeControl(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.vertical = options.vertical || false; // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    _this = _Component.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkVolumeSupport(_assertThisInitialized(_this), player);\n    _this.throttledHandleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('touchstart', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('mousemove', function (e) {\n      return _this.handleMouseMove(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n\n      _this.addClass('vjs-slider-active');\n\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n\n      _this.removeClass('vjs-slider-active');\n\n      _this.trigger('sliderinactive');\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeControl.prototype;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-control vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\nComponent$1.registerComponent('VolumeControl', VolumeControl);\n\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\nvar MuteToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(MuteToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MuteToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkMuteSupport(_assertThisInitialized(_this), player);\n\n    _this.on(player, ['loadstart', 'volumechange'], function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = MuteToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-mute-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  }\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  }\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3; // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n\n    if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    } // TODO improve muted icon classes\n\n\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, \"vjs-vol-\" + i);\n    }\n\n    addClass(this.el_, \"vjs-vol-\" + level);\n  }\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\nComponent$1.registerComponent('MuteToggle', MuteToggle);\n\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumePanel, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumePanel(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    } // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n\n\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    _this = _Component.call(this, player, options) || this; // this handler is used by mouse handler methods below\n\n    _this.handleKeyPressHandler_ = function (e) {\n      return _this.handleKeyPress(e);\n    };\n\n    _this.on(player, ['loadstart'], function (e) {\n      return _this.volumePanelState_(e);\n    });\n\n    _this.on(_this.muteToggle, 'keyup', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on(_this.volumeControl, 'keyup', function (e) {\n      return _this.handleVolumeControlKeyUp(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on('mouseover', function (e) {\n      return _this.handleMouseOver(e);\n    });\n\n    _this.on('mouseout', function (e) {\n      return _this.handleMouseOut(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n\n    return _this;\n  }\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  var _proto = VolumePanel.prototype;\n\n  _proto.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  }\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n  ;\n\n  _proto.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  }\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n  ;\n\n  _proto.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    } // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n\n\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-panel vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Dispose of the `volume-panel` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseOut();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes\n   * the volume panel and sets focus on `MuteToggle`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keyup` event that caused this function to be called.\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleVolumeControlKeyUp = function handleVolumeControlKeyUp(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.muteToggle.focus();\n    }\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseover` event.\n   * Turns on listening for `mouseover` event. When they happen it\n   * calls `this.handleMouseOver`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseover` event that caused this function to be called.\n   *\n   * @listens mouseover\n   */\n  ;\n\n  _proto.handleMouseOver = function handleMouseOver(event) {\n    this.addClass('vjs-hover');\n    on(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseout` event.\n   * Turns on listening for `mouseout` event. When they happen it\n   * calls `this.handleMouseOut`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseout` event that caused this function to be called.\n   *\n   * @listens mouseout\n   */\n  ;\n\n  _proto.handleMouseOut = function handleMouseOut(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,\n   * looking for ESC, which hides the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown | keyup\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.handleMouseOut();\n    }\n  };\n\n  return VolumePanel;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\nComponent$1.registerComponent('VolumePanel', VolumePanel);\n\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Menu, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n  function Menu(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    }); // All the menu item instances share the same blur handler provided by the menu container.\n\n\n    _this.boundHandleBlur_ = function (e) {\n      return _this.handleBlur(e);\n    };\n\n    _this.boundHandleTapClick_ = function (e) {\n      return _this.handleTapClick(e);\n    };\n\n    return _this;\n  }\n  /**\n   * Add event listeners to the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to add listeners to.\n   *\n   */\n\n\n  var _proto = Menu.prototype;\n\n  _proto.addEventListenerForItem = function addEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.on(component, 'blur', this.boundHandleBlur_);\n    this.on(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * Remove event listeners from the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to remove listeners.\n   *\n   */\n  ;\n\n  _proto.removeEventListenerForItem = function removeEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.off(component, 'blur', this.boundHandleBlur_);\n    this.off(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * This method will be called indirectly when the component has been added\n   * before the component adds to the new menu instance by `addItem`.\n   * In this case, the original menu instance will remove the component\n   * by calling `removeChild`.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem`\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    this.removeEventListenerForItem(component);\n\n    _Component.prototype.removeChild.call(this, component);\n  }\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n  ;\n\n  _proto.addItem = function addItem(component) {\n    var childComponent = this.addChild(component);\n\n    if (childComponent) {\n      this.addEventListenerForItem(childComponent);\n    }\n  }\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_); // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.boundHandleBlur_ = null;\n    this.boundHandleTapClick_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Called when a `MenuItem` loses focus.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n  ;\n\n  _proto.handleBlur = function handleBlur(event) {\n    var relatedTarget = event.relatedTarget || document.activeElement; // Close menu popup when a user clicks outside the menu\n\n    if (!this.children().some(function (element) {\n      return element.el() === relatedTarget;\n    })) {\n      var btn = this.menuButton_;\n\n      if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {\n        btn.unpressButton();\n      }\n    }\n  }\n  /**\n   * Called when a `MenuItem` gets clicked or tapped.\n   *\n   * @param {EventTarget~Event} event\n   *        The `click` or `tap` event that caused this function to be called.\n   *\n   * @listens click,tap\n   */\n  ;\n\n  _proto.handleTapClick = function handleTapClick(event) {\n    // Unpress the associated MenuButton, and move focus back to it\n    if (this.menuButton_) {\n      this.menuButton_.unpressButton();\n      var childComponents = this.children();\n\n      if (!Array.isArray(childComponents)) {\n        return;\n      }\n\n      var foundComponent = childComponents.filter(function (component) {\n        return component.el() === event.target;\n      })[0];\n\n      if (!foundComponent) {\n        return;\n      } // don't focus menu button if item is a caption settings item\n      // because focus will move elsewhere\n\n\n      if (foundComponent.name() !== 'CaptionSettingsMenuItem') {\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack();\n    }\n  }\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n  ;\n\n  _proto.focus = function focus(item) {\n    if (item === void 0) {\n      item = 0;\n    }\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].hasClass('vjs-menu-title');\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component$1);\n\nComponent$1.registerComponent('Menu', Menu);\n\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MenuButton, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function MenuButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Component.call(this, player, options) || this;\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true'); // Add buildCSSClass values to the button, not the wrapper\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    var handleClick = function handleClick(e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMenuKeyUp_ = function (e) {\n      return _this.handleMenuKeyUp(e);\n    };\n\n    _this.on(_this.menuButton_, 'tap', handleClick);\n\n    _this.on(_this.menuButton_, 'click', handleClick);\n\n    _this.on(_this.menuButton_, 'keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on(_this.menuButton_, 'mouseenter', function () {\n      _this.addClass('vjs-hover');\n\n      _this.menu.show();\n\n      on(document, 'keyup', _this.handleMenuKeyUp_);\n    });\n\n    _this.on('mouseleave', function (e) {\n      return _this.handleMouseLeave(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleSubmenuKeyDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  var _proto = MenuButton.prototype;\n\n  _proto.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n      this.menu.contentEl_.removeAttribute('role');\n    } else {\n      this.show();\n      this.menu.contentEl_.setAttribute('role', 'menu');\n    }\n  }\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, {\n      menuButton: this\n    });\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n\n    this.hideThreshold_ = 0; // Add a title list item to the top\n\n    if (this.options_.title) {\n      var titleEl = createEl('li', {\n        className: 'vjs-menu-title',\n        textContent: toTitleCase$1(this.options_.title),\n        tabIndex: -1\n      });\n      var titleComponent = new Component$1(this.player_, {\n        el: titleEl\n      });\n      menu.addItem(titleComponent);\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.createItems = function createItems() {}\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  }\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n  ;\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    } // TODO: Fix the CSS so that this isn't necessary\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + buttonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.menuButton_.el();\n    }\n\n    return this.menuButton_.controlText(text, el);\n  }\n  /**\n   * Dispose of the `menu-button` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseLeave();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  }\n  /**\n   * Handle `mouseleave` for `MenuButton`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseleave` event that caused this function to be called.\n   *\n   * @listens mouseleave\n   */\n  ;\n\n  _proto.handleMouseLeave = function handleMouseLeave(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleMenuKeyUp_);\n  }\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.menuButton_.focus();\n  }\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.menuButton_.blur();\n  }\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      } // Up Arrow or Down Arrow also 'press' the button to open the menu\n\n    } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {\n      if (!this.buttonPressed_) {\n        event.preventDefault();\n        this.pressButton();\n      }\n    }\n  }\n  /**\n   * Handle a `keyup` event on a `MenuButton`. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleMenuKeyUp = function handleMenuKeyUp(event) {\n    // Escape hides popup menu\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      this.removeClass('vjs-hover');\n    }\n  }\n  /**\n   * This method name now delegates to `handleSubmenuKeyDown`. This means\n   * anyone calling `handleSubmenuKeyPress` will not see their method calls\n   * stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n    this.handleSubmenuKeyDown(event);\n  }\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleSubmenuKeyDown = function handleSubmenuKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n  ;\n\n  _proto.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.show();\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true'); // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  }\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n  ;\n\n  _proto.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menu.hide();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  }\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.unpressButton();\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.menuButton_.disable();\n  }\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component$1);\n\nComponent$1.registerComponent('MenuButton', MenuButton);\n\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(TrackButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TrackButton(player, options) {\n    var _this;\n\n    var tracks = options.tracks;\n    _this = _MenuButton.call(this, player, options) || this;\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return _assertThisInitialized(_this);\n    }\n\n    var updateHandler = bind(_assertThisInitialized(_this), _this.update);\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n    tracks.addEventListener('labelchange', updateHandler);\n\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n      tracks.removeEventListener('labelchange', updateHandler);\n    });\n\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent$1.registerComponent('TrackButton', TrackButton);\n\n/**\n * @file menu-keys.js\n */\n\n/**\n  * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)\n  * Note that 'Enter' and 'Space' are not included here (otherwise they would\n  * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)\n  * @typedef MenuKeys\n  * @array\n  */\nvar MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];\n\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(MenuItem, _ClickableComponent);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n  function MenuItem(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = MenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n\n    var el = _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      tabIndex: -1\n    }, props), attrs); // swap icon with menu item text.\n\n\n    el.replaceChild(createEl('span', {\n      className: 'vjs-menu-item-text',\n      textContent: this.localize(this.options_.label)\n    }), el.querySelector('.vjs-icon-placeholder'));\n    return el;\n  }\n  /**\n   * Ignore keys which are used by the menu, but pass any other ones up. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (!MenuKeys.some(function (key) {\n      return keycode.isEventKey(event, key);\n    })) {\n      // Pass keydown handling up for unused keys\n      _ClickableComponent.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    this.selected(true);\n  }\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n  ;\n\n  _proto.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true'); // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false'); // Indicate un-selected state to screen reader\n\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent$1.registerComponent('MenuItem', MenuItem);\n\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(TextTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TextTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.textTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track; // Determine the relevant kind(s) of tracks for this component and filter\n    // out empty kinds.\n\n    _this.kinds = (options.kinds || [options.kind || _this.track.kind]).filter(Boolean);\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    }); // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n\n\n    if (tracks.onchange === undefined) {\n      var event;\n\n      _this.on(['tap', 'click'], function () {\n        if (typeof window$1.Event !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window$1.Event('change');\n          } catch (err) {// continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    } // set the default state based on current tracks\n\n\n    _this.handleTracksChange();\n\n    return _this;\n  }\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = TextTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    var referenceTrack = this.track;\n    var tracks = this.player_.textTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // If the track from the text tracks list is not of the right kind,\n      // skip it. We do not want to affect tracks of incompatible kind(s).\n\n      if (this.kinds.indexOf(track.kind) === -1) {\n        continue;\n      } // If this text track is the component's track and it is not showing,\n      // set it to showing.\n\n\n      if (track === referenceTrack) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        } // If this text track is not the component's track and it is not\n        // disabled, set it to disabled.\n\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  }\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing'; // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage; // Don't replace the kind of track across the same language\n\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(OffTextTrackMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function OffTextTrackMenuItem(player, options) {\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      // it is no longer necessary to store `kind` or `kinds` on the track itself\n      // since they are now stored in the `kinds` property of all instances of\n      // TextTrackMenuItem, but this will remain for backwards compatibility\n      kind: options.kind,\n      kinds: options.kinds,\n      \"default\": false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    } // MenuItem is selectable\n\n\n    options.selectable = true; // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n\n    options.multiSelectable = false;\n    return _TextTrackMenuItem.call(this, player, options) || this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  var _proto = OffTextTrackMenuItem.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    } // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(TextTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function TextTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.textTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  var _proto = TextTrackButton.prototype;\n\n  _proto.createItems = function createItems(items, TrackMenuItem) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    if (TrackMenuItem === void 0) {\n      TrackMenuItem = TextTrackMenuItem;\n    }\n\n    // Label is an override for the [track] off label\n    // USed to localise captions/subtitles\n    var label;\n\n    if (this.label_) {\n      label = this.label_ + \" off\";\n    } // Add an OFF menu item to turn all tracks off\n\n\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n    this.hideThreshold_ += 1;\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // only add tracks that are of an appropriate kind and have a label\n\n      if (this.kinds_.indexOf(track.kind) > -1) {\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          kinds: this.kinds_,\n          kind: this.kind_,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n        item.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent$1.registerComponent('TextTrackButton', TextTrackButton);\n\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(ChaptersTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ChaptersTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime(); // Modify options for parent MenuItem class's init.\n\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n    _this.cue = cue;\n    return _this;\n  }\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = ChaptersTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player_.currentTime(this.cue.startTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(ChaptersButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n  function ChaptersButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n\n    _this.selectCurrentItem_ = function () {\n      _this.items.forEach(function (item) {\n        item.selected(_this.track_.activeCues[0] === item.cue);\n      });\n    };\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = ChaptersButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.update = function update(event) {\n    if (event && event.track && event.track.kind !== 'chapters') {\n      return;\n    }\n\n    var track = this.findChaptersTrack();\n\n    if (track !== this.track_) {\n      this.setTrack(track);\n\n      _TextTrackButton.prototype.update.call(this);\n    } else if (!this.items || track && track.cues && track.cues.length !== this.items.length) {\n      // Update the menu initially or if the number of cues has changed since set\n      _TextTrackButton.prototype.update.call(this);\n    }\n  }\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n  ;\n\n  _proto.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    } // here this.track_ refers to the old track instance\n\n\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_.removeEventListener('cuechange', this.selectCurrentItem_);\n      this.track_ = null;\n    }\n\n    this.track_ = track; // here this.track_ refers to the new track instance\n\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n\n      this.track_.addEventListener('cuechange', this.selectCurrentItem_);\n    }\n  }\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n  ;\n\n  _proto.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  }\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n  ;\n\n  _proto.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n\n    return this.localize(toTitleCase$1(this.kind_));\n  }\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, {\n        track: this.track_,\n        cue: cue\n      });\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nChaptersButton.prototype.controlText_ = 'Chapters';\nComponent$1.registerComponent('ChaptersButton', ChaptersButton);\n\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(DescriptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function DescriptionsButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n    var tracks = player.textTracks();\n    var changeHandler = bind(_assertThisInitialized(_this), _this.handleTracksChange);\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  var _proto = DescriptionsButton.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false; // Check whether a track of a different kind is showing\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    } // If another track is showing, disable this menu button\n\n\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\nComponent$1.registerComponent('DescriptionsButton', DescriptionsButton);\n\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubtitlesButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function SubtitlesButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubtitlesButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubtitlesButton', SubtitlesButton);\n\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(CaptionSettingsMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CaptionSettingsMenuItem(player, options) {\n    var _this;\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      \"default\": false,\n      mode: 'disabled'\n    }; // CaptionSettingsMenuItem has no concept of 'selected'\n\n    options.selectable = false;\n    options.name = 'CaptionSettingsMenuItem';\n    _this = _TextTrackMenuItem.call(this, player, options) || this;\n\n    _this.addClass('vjs-texttrack-settings');\n\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n\n    return _this;\n  }\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = CaptionSettingsMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(CaptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function CaptionsButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = CaptionsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.kind_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nCaptionsButton.prototype.controlText_ = 'Captions';\nComponent$1.registerComponent('CaptionsButton', CaptionsButton);\n\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    return _TextTrackMenuItem.apply(this, arguments) || this;\n  }\n\n  var _proto = SubsCapsMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'captions') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        // space added as the text will visually flow with the\n        // label\n        textContent: \" \" + this.localize('Captions')\n      }));\n    }\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _TextTrackButton.call(this, player, options) || this; // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n\n    _this.label_ = 'subtitles';\n\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n\n    _this.menuButton_.controlText(toTitleCase$1(_this.label_));\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubsCapsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.label_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\n\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubsCapsButton', SubsCapsButton);\n\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(AudioTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function AudioTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.audioTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n\n    _this.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n\n  var _proto = AudioTrackMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _MenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'main-desc') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        textContent: ' ' + this.localize('Descriptions')\n      }));\n    }\n\n    return el;\n  }\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this, event); // the audio track list will automatically toggle other tracks\n    // off for us.\n\n\n    this.track.enabled = true; // when native audio tracks are used, we want to make sure that other tracks are turned off\n\n    if (this.player_.tech_.featuresNativeAudioTracks) {\n      var tracks = this.player_.audioTracks();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i]; // skip the current track since we enabled it above\n\n        if (track === this.track) {\n          continue;\n        }\n\n        track.enabled = track === this.track;\n      }\n    }\n  }\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(AudioTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function AudioTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.audioTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = AudioTrackButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems(items) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    // if there's only one audio track, there no point in showing it\n    this.hideThreshold_ = 1;\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent$1.registerComponent('AudioTrackButton', AudioTrackButton);\n\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(PlaybackRateMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuItem(player, options) {\n    var _this;\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10); // Modify options for parent MenuItem class's init.\n\n    options.label = label;\n    options.selected = rate === player.playbackRate();\n    options.selectable = true;\n    options.multiSelectable = false;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = PlaybackRateMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player().playbackRate(this.rate);\n  }\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\nComponent$1.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(PlaybackRateMenuButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuButton(player, options) {\n    var _this;\n\n    _this = _MenuButton.call(this, player, options) || this;\n\n    _this.menuButton_.el_.setAttribute('aria-describedby', _this.labelElId_);\n\n    _this.updateVisibility();\n\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', function (e) {\n      return _this.updateVisibility(e);\n    });\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.updateLabel(e);\n    });\n\n    _this.on(player, 'playbackrateschange', function (e) {\n      return _this.handlePlaybackRateschange(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlaybackRateMenuButton.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelElId_ = 'vjs-playback-rate-value-label-' + this.id_;\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      id: this.labelElId_,\n      textContent: '1x'\n    });\n    el.appendChild(this.labelEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var rates = this.playbackRates();\n    var items = [];\n\n    for (var i = rates.length - 1; i >= 0; i--) {\n      items.push(new PlaybackRateMenuItem(this.player(), {\n        rate: rates[i] + 'x'\n      }));\n    }\n\n    return items;\n  }\n  /**\n   * Updates ARIA accessibility attributes\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates();\n    var currentIndex = rates.indexOf(currentRate); // this get the next rate and it will select first one if the last one currently selected\n\n    var newIndex = (currentIndex + 1) % rates.length;\n    this.player().playbackRate(rates[newIndex]);\n  }\n  /**\n   * On playbackrateschange, update the menu to account for the new items.\n   *\n   * @listens Player#playbackrateschange\n   */\n  ;\n\n  _proto.handlePlaybackRateschange = function handlePlaybackRateschange(event) {\n    this.update();\n  }\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates() {\n    var player = this.player();\n    return player.playbackRates && player.playbackRates() || [];\n  }\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n  ;\n\n  _proto.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  }\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  }\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.textContent = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\nComponent$1.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Spacer, _Component);\n\n  function Spacer() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = Spacer.prototype;\n\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-spacer \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    if (!props.className) {\n      props.className = this.buildCSSClass();\n    }\n\n    return _Component.prototype.createEl.call(this, tag, props, attributes);\n  };\n\n  return Spacer;\n}(Component$1);\n\nComponent$1.registerComponent('Spacer', Spacer);\n\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer = /*#__PURE__*/function (_Spacer) {\n  _inheritsLoose(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    return _Spacer.apply(this, arguments) || this;\n  }\n\n  var _proto = CustomControlSpacer.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-custom-control-spacer \" + _Spacer.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Spacer.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      // No-flex/table-cell mode requires there be some content\n      // in the cell to fill the remaining space of the table.\n      textContent: \"\\xA0\"\n    });\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent$1.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ControlBar, _Component);\n\n  function ControlBar() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = ControlBar.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component$1);\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nif ('exitPictureInPicture' in document) {\n  ControlBar.prototype.options_.children.splice(ControlBar.prototype.options_.children.length - 1, 0, 'pictureInPictureToggle');\n}\n\nComponent$1.registerComponent('ControlBar', ControlBar);\n\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(ErrorDisplay, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ErrorDisplay(player, options) {\n    var _this;\n\n    _this = _ModalDialog.call(this, player, options) || this;\n\n    _this.on(player, 'error', function (e) {\n      return _this.open(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  var _proto = ErrorDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-error-display \" + _ModalDialog.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n  ;\n\n  _proto.content = function content() {\n    var error = this.player().error();\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = _extends({}, ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\nComponent$1.registerComponent('ErrorDisplay', ErrorDisplay);\n\nvar LOCAL_STORAGE_KEY$1 = 'vjs-text-track-settings';\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent']; // Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\n\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    \"default\": 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\n\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n  return parseOptionValue(value, parser);\n}\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\n\n\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\n\nvar TextTrackSettings = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(TextTrackSettings, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n  function TextTrackSettings(player, options) {\n    var _this;\n\n    options.temporary = false;\n    _this = _ModalDialog.call(this, player, options) || this;\n    _this.updateDisplay = _this.updateDisplay.bind(_assertThisInitialized(_this)); // fill the modal and pretend we have opened it\n\n    _this.fill();\n\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults(); // Grab `persistTextTrackSettings` from the player options if not passed in child options\n\n\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrackSettings.prototype;\n\n  _proto.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  }\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElSelect_ = function createElSelect_(key, legendId, type) {\n    var _this2 = this;\n\n    if (legendId === void 0) {\n      legendId = '';\n    }\n\n    if (type === void 0) {\n      type = 'label';\n    }\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n    return [\"<\" + type + \" id=\\\"\" + id + \"\\\" class=\\\"\" + (type === 'label' ? 'vjs-label' : '') + \"\\\">\", this.localize(config.label), \"</\" + type + \">\", \"<select aria-labelledby=\\\"\" + selectLabelledbyIds + \"\\\">\"].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n      return [\"<option id=\\\"\" + optionId + \"\\\" value=\\\"\" + o[0] + \"\\\" \", \"aria-labelledby=\\\"\" + selectLabelledbyIds + \" \" + optionId + \"\\\">\", _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  }\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFgColor_ = function createElFgColor_() {\n    var legendId = \"captions-text-legend-\" + this.id_;\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElBgColor_ = function createElBgColor_() {\n    var legendId = \"captions-background-\" + this.id_;\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElWinColor_ = function createElWinColor_() {\n    var legendId = \"captions-window-\" + this.id_;\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  }\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  }\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: [\"<button type=\\\"button\\\" class=\\\"vjs-default-button\\\" title=\\\"\" + defaultsDescription + \"\\\">\", this.localize('Reset'), \"<span class=\\\"vjs-control-text\\\"> \" + defaultsDescription + \"</span>\", '</button>', \"<button type=\\\"button\\\" class=\\\"vjs-done-button\\\">\" + this.localize('Done') + \"</button>\"].join('')\n    });\n  };\n\n  _proto.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  _proto.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  _proto.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  }\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  }\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  }\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n  ;\n\n  _proto.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config[\"default\"] : 0;\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  }\n  /**\n   * Restore texttrack settings from localStorage\n   */\n  ;\n\n  _proto.restoreSettings = function restoreSettings() {\n    var values;\n\n    try {\n      values = JSON.parse(window$1.localStorage.getItem(LOCAL_STORAGE_KEY$1));\n    } catch (err) {\n      log$1.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  }\n  /**\n   * Save text track settings to localStorage\n   */\n  ;\n\n  _proto.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window$1.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(values));\n      } else {\n        window$1.localStorage.removeItem(LOCAL_STORAGE_KEY$1);\n      }\n    } catch (err) {\n      log$1.warn(err);\n    }\n  }\n  /**\n   * Update display of text track settings\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent$1.registerComponent('TextTrackSettings', TextTrackSettings);\n\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ResizeManager, _Component);\n\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n  function ResizeManager(player, options) {\n    var _this;\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window$1.ResizeObserver; // if `null` was passed, we want to disable the ResizeObserver\n\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    } // Only create an element when ResizeObserver isn't available\n\n\n    var options_ = mergeOptions$3({\n      createEl: !RESIZE_OBSERVER_AVAILABLE,\n      reportTouchActivity: false\n    }, options);\n    _this = _Component.call(this, player, options_) || this;\n    _this.ResizeObserver = options.ResizeObserver || window$1.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _assertThisInitialized(_this));\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        var debouncedHandler_ = _this.debouncedHandler_;\n\n        var unloadListener_ = _this.unloadListener_ = function () {\n          off(this, 'resize', debouncedHandler_);\n          off(this, 'unload', unloadListener_);\n          unloadListener_ = null;\n        }; // safari and edge can unload the iframe before resizemanager dispose\n        // we have to dispose of event handlers correctly before that happens\n\n\n        on(_this.el_.contentWindow, 'unload', unloadListener_);\n        on(_this.el_.contentWindow, 'resize', debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n\n    return _this;\n  }\n\n  var _proto = ResizeManager.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager',\n      tabIndex: -1,\n      title: this.localize('No content')\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n  ;\n\n  _proto.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  _proto.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    if (this.el_ && this.el_.contentWindow && this.unloadListener_) {\n      this.unloadListener_.call(this.el_.contentWindow);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return ResizeManager;\n}(Component$1);\n\nComponent$1.registerComponent('ResizeManager', ResizeManager);\n\nvar defaults = {\n  trackingThreshold: 20,\n  liveTolerance: 15\n};\n/*\n  track when we are at the live edge, and other helpers for live playback */\n\n/**\n * A class for checking live current time and determining when the player\n * is at or behind the live edge.\n */\n\nvar LiveTracker = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveTracker, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {number} [options.trackingThreshold=20]\n   *        Number of seconds of live window (seekableEnd - seekableStart) that\n   *        media needs to have before the liveui will be shown.\n   *\n   * @param {number} [options.liveTolerance=15]\n   *        Number of seconds behind live that we have to be\n   *        before we will be considered non-live. Note that this will only\n   *        be used when playing at the live edge. This allows large seekable end\n   *        changes to not effect wether we are live or not.\n   */\n  function LiveTracker(player, options) {\n    var _this;\n\n    // LiveTracker does not need an element\n    var options_ = mergeOptions$3(defaults, options, {\n      createEl: false\n    });\n    _this = _Component.call(this, player, options_) || this;\n\n    _this.handleVisibilityChange_ = function (e) {\n      return _this.handleVisibilityChange(e);\n    };\n\n    _this.trackLiveHandler_ = function () {\n      return _this.trackLive_();\n    };\n\n    _this.handlePlay_ = function (e) {\n      return _this.handlePlay(e);\n    };\n\n    _this.handleFirstTimeupdate_ = function (e) {\n      return _this.handleFirstTimeupdate(e);\n    };\n\n    _this.handleSeeked_ = function (e) {\n      return _this.handleSeeked(e);\n    };\n\n    _this.seekToLiveEdge_ = function (e) {\n      return _this.seekToLiveEdge(e);\n    };\n\n    _this.reset_();\n\n    _this.on(_this.player_, 'durationchange', function (e) {\n      return _this.handleDurationchange(e);\n    }); // we should try to toggle tracking on canplay as native playback engines, like Safari\n    // may not have the proper values for things like seekableEnd until then\n\n\n    _this.on(_this.player_, 'canplay', function () {\n      return _this.toggleTracking();\n    }); // we don't need to track live playback if the document is hidden,\n    // also, tracking when the document is hidden can\n    // cause the CPU to spike and eventually crash the page on IE11.\n\n\n    if (IE_VERSION && 'hidden' in document && 'visibilityState' in document) {\n      _this.on(document, 'visibilitychange', _this.handleVisibilityChange_);\n    }\n\n    return _this;\n  }\n  /**\n   * toggle tracking based on document visiblility\n   */\n\n\n  var _proto = LiveTracker.prototype;\n\n  _proto.handleVisibilityChange = function handleVisibilityChange() {\n    if (this.player_.duration() !== Infinity) {\n      return;\n    }\n\n    if (document.hidden) {\n      this.stopTracking();\n    } else {\n      this.startTracking();\n    }\n  }\n  /**\n   * all the functionality for tracking when seek end changes\n   * and for tracking how far past seek end we should be\n   */\n  ;\n\n  _proto.trackLive_ = function trackLive_() {\n    var seekable = this.player_.seekable(); // skip undefined seekable\n\n    if (!seekable || !seekable.length) {\n      return;\n    }\n\n    var newTime = Number(window$1.performance.now().toFixed(4));\n    var deltaTime = this.lastTime_ === -1 ? 0 : (newTime - this.lastTime_) / 1000;\n    this.lastTime_ = newTime;\n    this.pastSeekEnd_ = this.pastSeekEnd() + deltaTime;\n    var liveCurrentTime = this.liveCurrentTime();\n    var currentTime = this.player_.currentTime(); // we are behind live if any are true\n    // 1. the player is paused\n    // 2. the user seeked to a location 2 seconds away from live\n    // 3. the difference between live and current time is greater\n    //    liveTolerance which defaults to 15s\n\n    var isBehind = this.player_.paused() || this.seekedBehindLive_ || Math.abs(liveCurrentTime - currentTime) > this.options_.liveTolerance; // we cannot be behind if\n    // 1. until we have not seen a timeupdate yet\n    // 2. liveCurrentTime is Infinity, which happens on Android and Native Safari\n\n    if (!this.timeupdateSeen_ || liveCurrentTime === Infinity) {\n      isBehind = false;\n    }\n\n    if (isBehind !== this.behindLiveEdge_) {\n      this.behindLiveEdge_ = isBehind;\n      this.trigger('liveedgechange');\n    }\n  }\n  /**\n   * handle a durationchange event on the player\n   * and start/stop tracking accordingly.\n   */\n  ;\n\n  _proto.handleDurationchange = function handleDurationchange() {\n    this.toggleTracking();\n  }\n  /**\n   * start/stop tracking\n   */\n  ;\n\n  _proto.toggleTracking = function toggleTracking() {\n    if (this.player_.duration() === Infinity && this.liveWindow() >= this.options_.trackingThreshold) {\n      if (this.player_.options_.liveui) {\n        this.player_.addClass('vjs-liveui');\n      }\n\n      this.startTracking();\n    } else {\n      this.player_.removeClass('vjs-liveui');\n      this.stopTracking();\n    }\n  }\n  /**\n   * start tracking live playback\n   */\n  ;\n\n  _proto.startTracking = function startTracking() {\n    if (this.isTracking()) {\n      return;\n    } // If we haven't seen a timeupdate, we need to check whether playback\n    // began before this component started tracking. This can happen commonly\n    // when using autoplay.\n\n\n    if (!this.timeupdateSeen_) {\n      this.timeupdateSeen_ = this.player_.hasStarted();\n    }\n\n    this.trackingInterval_ = this.setInterval(this.trackLiveHandler_, UPDATE_REFRESH_INTERVAL);\n    this.trackLive_();\n    this.on(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n\n    if (!this.timeupdateSeen_) {\n      this.one(this.player_, 'play', this.handlePlay_);\n      this.one(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    } else {\n      this.on(this.player_, 'seeked', this.handleSeeked_);\n    }\n  }\n  /**\n   * handle the first timeupdate on the player if it wasn't already playing\n   * when live tracker started tracking.\n   */\n  ;\n\n  _proto.handleFirstTimeupdate = function handleFirstTimeupdate() {\n    this.timeupdateSeen_ = true;\n    this.on(this.player_, 'seeked', this.handleSeeked_);\n  }\n  /**\n   * Keep track of what time a seek starts, and listen for seeked\n   * to find where a seek ends.\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked() {\n    var timeDiff = Math.abs(this.liveCurrentTime() - this.player_.currentTime());\n    this.seekedBehindLive_ = this.nextSeekedFromUser_ && timeDiff > 2;\n    this.nextSeekedFromUser_ = false;\n    this.trackLive_();\n  }\n  /**\n   * handle the first play on the player, and make sure that we seek\n   * right to the live edge.\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay() {\n    this.one(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * Stop tracking, and set all internal variables to\n   * their initial value.\n   */\n  ;\n\n  _proto.reset_ = function reset_() {\n    this.lastTime_ = -1;\n    this.pastSeekEnd_ = 0;\n    this.lastSeekEnd_ = -1;\n    this.behindLiveEdge_ = true;\n    this.timeupdateSeen_ = false;\n    this.seekedBehindLive_ = false;\n    this.nextSeekedFromUser_ = false;\n    this.clearInterval(this.trackingInterval_);\n    this.trackingInterval_ = null;\n    this.off(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n    this.off(this.player_, 'seeked', this.handleSeeked_);\n    this.off(this.player_, 'play', this.handlePlay_);\n    this.off(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    this.off(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * The next seeked event is from the user. Meaning that any seek\n   * > 2s behind live will be considered behind live for real and\n   * liveTolerance will be ignored.\n   */\n  ;\n\n  _proto.nextSeekedFromUser = function nextSeekedFromUser() {\n    this.nextSeekedFromUser_ = true;\n  }\n  /**\n   * stop tracking live playback\n   */\n  ;\n\n  _proto.stopTracking = function stopTracking() {\n    if (!this.isTracking()) {\n      return;\n    }\n\n    this.reset_();\n    this.trigger('liveedgechange');\n  }\n  /**\n   * A helper to get the player seekable end\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The furthest seekable end or Infinity.\n   */\n  ;\n\n  _proto.seekableEnd = function seekableEnd() {\n    var seekable = this.player_.seekable();\n    var seekableEnds = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableEnds.push(seekable.end(i));\n    } // grab the furthest seekable end after sorting, or if there are none\n    // default to Infinity\n\n\n    return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;\n  }\n  /**\n   * A helper to get the player seekable start\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The earliest seekable start or 0.\n   */\n  ;\n\n  _proto.seekableStart = function seekableStart() {\n    var seekable = this.player_.seekable();\n    var seekableStarts = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableStarts.push(seekable.start(i));\n    } // grab the first seekable start after sorting, or if there are none\n    // default to 0\n\n\n    return seekableStarts.length ? seekableStarts.sort()[0] : 0;\n  }\n  /**\n   * Get the live time window aka\n   * the amount of time between seekable start and\n   * live current time.\n   *\n   * @return {number}\n   *         The amount of seconds that are seekable in\n   *         the live video.\n   */\n  ;\n\n  _proto.liveWindow = function liveWindow() {\n    var liveCurrentTime = this.liveCurrentTime(); // if liveCurrenTime is Infinity then we don't have a liveWindow at all\n\n    if (liveCurrentTime === Infinity) {\n      return 0;\n    }\n\n    return liveCurrentTime - this.seekableStart();\n  }\n  /**\n   * Determines if the player is live, only checks if this component\n   * is tracking live playback or not\n   *\n   * @return {boolean}\n   *         Wether liveTracker is tracking\n   */\n  ;\n\n  _proto.isLive = function isLive() {\n    return this.isTracking();\n  }\n  /**\n   * Determines if currentTime is at the live edge and won't fall behind\n   * on each seekableendchange\n   *\n   * @return {boolean}\n   *         Wether playback is at the live edge\n   */\n  ;\n\n  _proto.atLiveEdge = function atLiveEdge() {\n    return !this.behindLiveEdge();\n  }\n  /**\n   * get what we expect the live current time to be\n   *\n   * @return {number}\n   *         The expected live current time\n   */\n  ;\n\n  _proto.liveCurrentTime = function liveCurrentTime() {\n    return this.pastSeekEnd() + this.seekableEnd();\n  }\n  /**\n   * The number of seconds that have occured after seekable end\n   * changed. This will be reset to 0 once seekable end changes.\n   *\n   * @return {number}\n   *         Seconds past the current seekable end\n   */\n  ;\n\n  _proto.pastSeekEnd = function pastSeekEnd() {\n    var seekableEnd = this.seekableEnd();\n\n    if (this.lastSeekEnd_ !== -1 && seekableEnd !== this.lastSeekEnd_) {\n      this.pastSeekEnd_ = 0;\n    }\n\n    this.lastSeekEnd_ = seekableEnd;\n    return this.pastSeekEnd_;\n  }\n  /**\n   * If we are currently behind the live edge, aka currentTime will be\n   * behind on a seekableendchange\n   *\n   * @return {boolean}\n   *         If we are behind the live edge\n   */\n  ;\n\n  _proto.behindLiveEdge = function behindLiveEdge() {\n    return this.behindLiveEdge_;\n  }\n  /**\n   * Wether live tracker is currently tracking or not.\n   */\n  ;\n\n  _proto.isTracking = function isTracking() {\n    return typeof this.trackingInterval_ === 'number';\n  }\n  /**\n   * Seek to the live edge if we are behind the live edge\n   */\n  ;\n\n  _proto.seekToLiveEdge = function seekToLiveEdge() {\n    this.seekedBehindLive_ = false;\n\n    if (this.atLiveEdge()) {\n      return;\n    }\n\n    this.nextSeekedFromUser_ = false;\n    this.player_.currentTime(this.liveCurrentTime());\n  }\n  /**\n   * Dispose of liveTracker\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.off(document, 'visibilitychange', this.handleVisibilityChange_);\n    this.stopTracking();\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return LiveTracker;\n}(Component$1);\n\nComponent$1.registerComponent('LiveTracker', LiveTracker);\n\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\n\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el(); // if `el.src` is set, that source will be loaded.\n\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n\n\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = ''; // if there are no sources, do not fire sourceset\n\n  if (!sources.length) {\n    return false;\n  } // only count valid/non-duplicate source elements\n\n\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  } // there were no valid sources\n\n\n  if (!srcUrls.length) {\n    return false;\n  } // there is only one valid source element url\n  // use that\n\n\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\n\n\nvar innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n  get: function get() {\n    return this.cloneNode(true).innerHTML;\n  },\n  set: function set(v) {\n    // make a dummy node to use innerHTML on\n    var dummy = document.createElement(this.nodeName.toLowerCase()); // set innerHTML to the value provided\n\n    dummy.innerHTML = v; // make a document fragment to hold the nodes from dummy\n\n    var docFrag = document.createDocumentFragment(); // copy all of the nodes created by the innerHTML on dummy\n    // to the document fragment\n\n    while (dummy.childNodes.length) {\n      docFrag.appendChild(dummy.childNodes[0]);\n    } // remove content\n\n\n    this.innerText = ''; // now we add all of that html in one by appending the\n    // document fragment. This is how innerHTML does it.\n\n    window$1.Element.prototype.appendChild.call(this, docFrag); // then return the result that innerHTML's setter would\n\n    return this.innerHTML;\n  }\n});\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\n\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, window$1.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n/**\n * Patches browser internal functions so that we can tell synchronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\n\n\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el(); // make sure firstSourceWatch isn't setup twice.\n\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n      sourcesetLoad(tech);\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    } // store the old function\n\n\n    old[k] = el[k]; // call the old function with a sourceset if a source\n    // was loaded\n\n    el[k] = appendWrapper(old[k]);\n  });\n  Object.defineProperty(el, 'innerHTML', mergeOptions$3(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  }; // on the first sourceset, we need to revert our changes\n\n\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\n\nvar srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n  get: function get() {\n    if (this.hasAttribute('src')) {\n      return getAbsoluteURL(window$1.Element.prototype.getAttribute.call(this, 'src'));\n    }\n\n    return '';\n  },\n  set: function set(v) {\n    window$1.Element.prototype.setAttribute.call(this, 'src', v);\n    return v;\n  }\n});\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\n\n\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el(); // make sure sourceset isn't setup twice.\n\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n  Object.defineProperty(el, 'src', mergeOptions$3(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v); // we use the getter here to get the actual value set on src\n\n      tech.triggerSourceset(el.src);\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el); // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n\n/**\n * Object.defineProperty but \"lazy\", which means that the value is only set after\n * it retrieved the first time, rather than being set right away.\n *\n * @param {Object} obj the object to set the property on\n * @param {string} key the key for the property to set\n * @param {Function} getValue the function used to get the value when it is needed.\n * @param {boolean} setter wether a setter shoould be allowed or not\n */\nvar defineLazyProperty = function defineLazyProperty(obj, key, getValue, setter) {\n  if (setter === void 0) {\n    setter = true;\n  }\n\n  var set = function set(value) {\n    return Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      writable: true\n    });\n  };\n\n  var options = {\n    configurable: true,\n    enumerable: true,\n    get: function get() {\n      var value = getValue();\n      set(value);\n      return value;\n    }\n  };\n\n  if (setter) {\n    options.set = set;\n  }\n\n  return Object.defineProperty(obj, key, options);\n};\n\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SourceHandlerAdditions\n * @extends Tech\n */\n\nvar Html5 = /*#__PURE__*/function (_Tech) {\n  _inheritsLoose(Html5, _Tech);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Html5(options, ready) {\n    var _this;\n\n    _this = _Tech.call(this, options, ready) || this;\n    var source = options.source;\n    var crossoriginTracks = false;\n    _this.featuresVideoFrameCallback = _this.featuresVideoFrameCallback && _this.el_.tagName === 'VIDEO'; // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    } // setup sourceset after late sourceset/init\n\n\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    _this.isScrubbing_ = false;\n\n    if (_this.el_.hasChildNodes()) {\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n\n            _this.remoteTextTracks().addTrack(node.track);\n\n            _this.textTracks().addTrack(node.track);\n\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log$1.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n' + 'This may prevent text tracks from loading.');\n    } // prevent iOS Safari from disabling metadata text tracks during native playback\n\n\n    _this.restoreMetadataTracksInIOSNativePlayer_(); // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n\n\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    } // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n\n\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n\n    return _this;\n  }\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  var _proto = Html5.prototype;\n\n  _proto.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null; // tech will handle clearing of the emulated track list\n\n    _Tech.prototype.dispose.call(this);\n  }\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n  ;\n\n  _proto.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  }\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n  ;\n\n  _proto.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState; // captures a snapshot of every metadata track's current state\n\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    }; // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n\n\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      } // we only want this handler to be executed on the first 'change' event\n\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    }; // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n\n\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot); // remove the listener before adding it just in case it wasn't previously removed\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    }); // start updating the snapshot again after leaving fullscreen\n\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot); // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  }\n  /**\n   * Attempt to force override of tracks for the given type\n   *\n   * @param {string} type - Track type to override, possible values include 'Audio',\n   * 'Video', and 'Text'.\n   * @param {boolean} override - If set to true native audio/video will be overridden,\n   * otherwise native audio/video will potentially be used.\n   * @private\n   */\n  ;\n\n  _proto.overrideNative_ = function overrideNative_(type, override) {\n    var _this2 = this;\n\n    // If there is no behavioral change don't add/remove listeners\n    if (override !== this[\"featuresNative\" + type + \"Tracks\"]) {\n      return;\n    }\n\n    var lowerCaseType = type.toLowerCase();\n\n    if (this[lowerCaseType + \"TracksListeners_\"]) {\n      Object.keys(this[lowerCaseType + \"TracksListeners_\"]).forEach(function (eventName) {\n        var elTracks = _this2.el()[lowerCaseType + \"Tracks\"];\n\n        elTracks.removeEventListener(eventName, _this2[lowerCaseType + \"TracksListeners_\"][eventName]);\n      });\n    }\n\n    this[\"featuresNative\" + type + \"Tracks\"] = !override;\n    this[lowerCaseType + \"TracksListeners_\"] = null;\n    this.proxyNativeTracksForType_(lowerCaseType);\n  }\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks(override) {\n    this.overrideNative_('Audio', override);\n  }\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks(override) {\n    this.overrideNative_('Video', override);\n  }\n  /**\n   * Proxy native track list events for the given type to our track\n   * lists if the browser we are playing in supports that type of track list.\n   *\n   * @param {string} name - Track type; values include 'audio', 'video', and 'text'\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracksForType_ = function proxyNativeTracksForType_(name) {\n    var _this3 = this;\n\n    var props = NORMAL[name];\n    var elTracks = this.el()[props.getterName];\n    var techTracks = this[props.getterName]();\n\n    if (!this[\"featuresNative\" + props.capitalName + \"Tracks\"] || !elTracks || !elTracks.addEventListener) {\n      return;\n    }\n\n    var listeners = {\n      change: function change(e) {\n        var event = {\n          type: 'change',\n          target: techTracks,\n          currentTarget: techTracks,\n          srcElement: techTracks\n        };\n        techTracks.trigger(event); // if we are a text track change event, we should also notify the\n        // remote text track list. This can potentially cause a false positive\n        // if we were to get a change event on a non-remote track and\n        // we triggered the event on the remote text track list which doesn't\n        // contain that track. However, best practices mean looping through the\n        // list of tracks and searching for the appropriate mode value, so,\n        // this shouldn't pose an issue\n\n        if (name === 'text') {\n          _this3[REMOTE.remoteText.getterName]().trigger(event);\n        }\n      },\n      addtrack: function addtrack(e) {\n        techTracks.addTrack(e.track);\n      },\n      removetrack: function removetrack(e) {\n        techTracks.removeTrack(e.track);\n      }\n    };\n\n    var removeOldTracks = function removeOldTracks() {\n      var removeTracks = [];\n\n      for (var i = 0; i < techTracks.length; i++) {\n        var found = false;\n\n        for (var j = 0; j < elTracks.length; j++) {\n          if (elTracks[j] === techTracks[i]) {\n            found = true;\n            break;\n          }\n        }\n\n        if (!found) {\n          removeTracks.push(techTracks[i]);\n        }\n      }\n\n      while (removeTracks.length) {\n        techTracks.removeTrack(removeTracks.shift());\n      }\n    };\n\n    this[props.getterName + 'Listeners_'] = listeners;\n    Object.keys(listeners).forEach(function (eventName) {\n      var listener = listeners[eventName];\n      elTracks.addEventListener(eventName, listener);\n\n      _this3.on('dispose', function (e) {\n        return elTracks.removeEventListener(eventName, listener);\n      });\n    }); // Remove (native) tracks that are not used anymore\n\n    this.on('loadstart', removeOldTracks);\n    this.on('dispose', function (e) {\n      return _this3.off('loadstart', removeOldTracks);\n    });\n  }\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this4 = this;\n\n    NORMAL.names.forEach(function (name) {\n      _this4.proxyNativeTracksForType_(name);\n    });\n  }\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var el = this.options_.tag; // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video'); // determine if native controls should be used\n\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions$3({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          \"class\": 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    }\n\n    if (this.options_.disablePictureInPicture !== undefined) {\n      el.disablePictureInPicture = this.options_.disablePictureInPicture;\n    } // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n\n\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  }\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n  ;\n\n  _proto.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n      return;\n    } // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n\n\n    var eventsToTrigger = ['loadstart']; // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n\n    eventsToTrigger.push('loadedmetadata'); // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    } // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n\n\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    } // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n\n\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    } // We still need to give the player time to add event listeners\n\n\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  }\n  /**\n   * Set whether we are scrubbing or not.\n   * This is used to decide whether we should use `fastSeek` or not.\n   * `fastSeek` is used to provide trick play on Safari browsers.\n   *\n   * @param {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing(isScrubbing) {\n    this.isScrubbing_ = isScrubbing;\n  }\n  /**\n   * Get whether we are scrubbing or not.\n   *\n   * @return {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {\n    return this.isScrubbing_;\n  }\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      if (this.isScrubbing_ && this.el_.fastSeek && IS_ANY_SAFARI) {\n        this.el_.fastSeek(seconds);\n      } else {\n        this.el_.currentTime = seconds;\n      }\n    } catch (e) {\n      log$1(e, 'Video is not ready. (Video.js)'); // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  }\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n  ;\n\n  _proto.duration = function duration() {\n    var _this5 = this;\n\n    // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this5.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this5.el_.duration === Infinity) {\n            _this5.trigger('durationchange');\n          }\n\n          _this5.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n\n    return this.el_.duration || NaN;\n  }\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n  ;\n\n  _proto.width = function width() {\n    return this.el_.offsetWidth;\n  }\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The height of the HTML5 media element.\n   */\n  ;\n\n  _proto.height = function height() {\n    return this.el_.offsetHeight;\n  }\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n  ;\n\n  _proto.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this6 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', {\n        isFullscreen: false\n      }); // Safari will sometimes set contols on the videoelement when existing fullscreen.\n\n      if (this.el_.controls && !this.options_.nativeControlsForTouch && this.controls()) {\n        this.el_.controls = false;\n      }\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n        this.trigger('fullscreenchange', {\n          isFullscreen: true,\n          // set a flag in case another tech triggers fullscreenchange\n          nativeIOSFullscreen: true\n        });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this6.off('webkitbeginfullscreen', beginFn);\n\n      _this6.off('webkitendfullscreen', endFn);\n    });\n  }\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window$1.navigator && window$1.navigator.userAgent || ''; // Seems to be broken in Chromium/Chrome && Safari in Leopard\n\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n  ;\n\n  _proto.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      silencePromise(this.el_.play()); // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n\n      this.setTimeout(function () {\n        video.pause();\n\n        try {\n          video.webkitEnterFullScreen();\n        } catch (e) {\n          this.trigger('fullscreenerror', e);\n        }\n      }, 0);\n    } else {\n      try {\n        video.webkitEnterFullScreen();\n      } catch (e) {\n        this.trigger('fullscreenerror', e);\n      }\n    }\n  }\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n  ;\n\n  _proto.exitFullScreen = function exitFullScreen() {\n    if (!this.el_.webkitDisplayingFullscreen) {\n      this.trigger('fullscreenerror', new Error('The video is not fullscreen'));\n      return;\n    }\n\n    this.el_.webkitExitFullScreen();\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    return this.el_.requestPictureInPicture();\n  }\n  /**\n   * Native requestVideoFrameCallback if supported by browser/tech, or fallback\n   * Don't use rVCF on Safari when DRM is playing, as it doesn't fire\n   * Needs to be checked later than the constructor\n   * This will be a false positive for clear sources loaded after a Fairplay source\n   *\n   * @param {function} cb function to call\n   * @return {number} id of request\n   */\n  ;\n\n  _proto.requestVideoFrameCallback = function requestVideoFrameCallback(cb) {\n    if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n      return this.el_.requestVideoFrameCallback(cb);\n    }\n\n    return _Tech.prototype.requestVideoFrameCallback.call(this, cb);\n  }\n  /**\n   * Native or fallback requestVideoFrameCallback\n   *\n   * @param {number} id request id to cancel\n   */\n  ;\n\n  _proto.cancelVideoFrameCallback = function cancelVideoFrameCallback(id) {\n    if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n      this.el_.cancelVideoFrameCallback(id);\n    } else {\n      _Tech.prototype.cancelVideoFrameCallback.call(this, id);\n    }\n  }\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n  ;\n\n  _proto.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    } // Setting src through `src` instead of `setSrc` will be deprecated\n\n\n    this.setSrc(_src);\n  }\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  }\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n\n    return this.el_.currentSrc;\n  }\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n  ;\n\n  _proto.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  }\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label]\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n\n    if (options[\"default\"]) {\n      htmlTrackElement[\"default\"] = options[\"default\"];\n    }\n\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window$1.performance && typeof window$1.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window$1.performance.now();\n    } else if (window$1.performance && window$1.performance.timing && typeof window$1.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window$1.Date.now() - window$1.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n/* HTML5 Support Testing ---------------------------------------------------- */\n\n/**\n * Element for testing browser HTML5 media capabilities\n *\n * @type {Element}\n * @constant\n * @private\n */\n\n\ndefineLazyProperty(Html5, 'TEST_VID', function () {\n  if (!isReal()) {\n    return;\n  }\n\n  var video = document.createElement('video');\n  var track = document.createElement('track');\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  video.appendChild(track);\n  return video;\n});\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\n\nHtml5.isSupported = function () {\n  // IE with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n/**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    var canControl = volume !== Html5.TEST_VID.volume; // With the introduction of iOS 15, there are cases where the volume is read as\n    // changed but reverts back to its original state at the start of the next tick.\n    // To determine whether volume can be controlled on iOS,\n    // a timeout is set and the volume is checked asynchronously.\n    // Since `features` doesn't currently work asynchronously, the value is manually set.\n\n    if (canControl && IS_IOS) {\n      window$1.setTimeout(function () {\n        if (Html5 && Html5.prototype) {\n          Html5.prototype.featuresVolumeControl = volume !== Html5.TEST_VID.volume;\n        }\n      }); // default iOS to false, which will be updated in the timeout above.\n\n      return false;\n    }\n\n    return canControl;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\n\n\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted; // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n\n    Html5.TEST_VID.muted = !muted;\n\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  } // IE will error if Windows Media Player not installed #3315\n\n\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overridden\n *         - False otherwise\n */\n\n\nHtml5.canOverrideAttributes = function () {\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\n\n\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\n\n\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\n\n[['featuresMuteControl', 'canMuteVolume'], ['featuresPlaybackRate', 'canControlPlaybackRate'], ['featuresSourceset', 'canOverrideAttributes'], ['featuresNativeTextTracks', 'supportsNativeTextTracks'], ['featuresNativeVideoTracks', 'supportsNativeVideoTracks'], ['featuresNativeAudioTracks', 'supportsNativeAudioTracks']].forEach(function (_ref) {\n  var key = _ref[0],\n      fn = _ref[1];\n  defineLazyProperty(Html5.prototype, key, function () {\n    return Html5[fn]();\n  }, true);\n});\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS; // TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresFullscreenResize = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggered instead.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresProgressEvents = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggered instead.\n *\n * @default\n */\n\nHtml5.prototype.featuresTimeupdateEvents = true;\n/**\n * Whether the HTML5 el supports `requestVideoFrameCallback`\n *\n * @type {boolean}\n */\n\nHtml5.prototype.featuresVideoFrameCallback = !!(Html5.TEST_VID && Html5.TEST_VID.requestVideoFrameCallback); // HTML5 Feature detection and Device Fixes --------------------------------- //\n\nvar canPlayType;\n\nHtml5.patchCanPlayType = function () {\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\n\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      var mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\n\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n\n  if (canPlayType) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  }\n\n  return r;\n}; // by default, patch the media element\n\n\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  } // remove any child track or source nodes to prevent their loading\n\n\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  } // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n\n\n  el.removeAttribute('src'); // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  } // remove any src reference.\n  // not setting `src=''` because that throws an error\n\n\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// satisfy linter\n      }\n    })();\n  }\n};\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n\n\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n}); // Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on initial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n}); // Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, disablePictureInPicture\n// played, networkState, readyState, videoWidth, videoHeight, crossOrigin\n\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occurred during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - False indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n/**\n * Get the value of 'disablePictureInPicture' from the video element.\n *\n * @method Html5#disablePictureInPicture\n * @return {boolean} value\n *         - The value of `disablePictureInPicture` from the video element.\n *         - True indicates that the video can't be played in Picture-In-Picture mode\n *         - False indicates that the video can be played in Picture-In-Picture mode\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NETWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n/**\n * Get the value of `videoHeight` from the video element. `videoHeight` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight',\n/**\n * Get the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#crossOrigin\n * @return {string}\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n}); // Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate,\n// setDisablePictureInPicture, setCrossOrigin\n\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate',\n/**\n * Prevents the browser from suggesting a Picture-in-Picture context menu\n * or to request Picture-in-Picture automatically in some cases.\n *\n * @method Html5#setDisablePictureInPicture\n * @param {boolean} value\n *         The true value will disable Picture-in-Picture mode.\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Set the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#setCrossOrigin\n * @param {string} crossOrigin\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n}); // wrap native functions with a function\n// The list is as follows:\n// pause, load, play\n\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\nTech.withSourceHandlers(Html5);\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @property {Tech~SourceObject} source\n *        The source object\n *\n * @property {Html5} tech\n *        The instance of the HTML5 tech.\n */\n\nHtml5.nativeSourceHandler = {};\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\n\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE without MediaPlayer throws an error (#519)\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\n\n\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type); // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n    return Html5.nativeSourceHandler.canPlayType(\"video/\" + ext);\n  }\n\n  return '';\n};\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\n\n\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\n\n\nHtml5.nativeSourceHandler.dispose = function () {}; // Register the native source handler\n\n\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\nTech.registerTech('Html5', Html5);\n\n// on the player when they happen\n\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `loadedmetadata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange']; // events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\n\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\nvar BREAKPOINT_CLASSES = {}; // grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\n\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? \"x-\" + k.substring(1) : k;\n  BREAKPOINT_CLASSES[k] = \"vjs-layout-\" + v;\n});\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Player, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n  function Player(tag, options, ready) {\n    var _this;\n\n    // Make sure tag ID exists\n    tag.id = tag.id || options.id || \"vjs_video_\" + newGUID(); // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n\n    options = assign(Player.getTagSettings(tag), options); // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n\n    options.initChildren = false; // Same with creating the element\n\n    options.createEl = false; // don't auto mixin the evented mixin\n\n    options.evented = false; // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n\n    options.reportTouchActivity = false; // If language is not set, get the closest lang attribute\n\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n\n          element = element.parentNode;\n        }\n      }\n    } // Run base component initializing with new options\n\n\n    _this = _Component.call(this, null, options, ready) || this; // Create bound methods for document listeners.\n\n    _this.boundDocumentFullscreenChange_ = function (e) {\n      return _this.documentFullscreenChange_(e);\n    };\n\n    _this.boundFullWindowOnEscKey_ = function (e) {\n      return _this.fullWindowOnEscKey(e);\n    };\n\n    _this.boundUpdateStyleEl_ = function (e) {\n      return _this.updateStyleEl_(e);\n    };\n\n    _this.boundApplyInitTime_ = function (e) {\n      return _this.applyInitTime_(e);\n    };\n\n    _this.boundUpdateCurrentBreakpoint_ = function (e) {\n      return _this.updateCurrentBreakpoint_(e);\n    };\n\n    _this.boundHandleTechClick_ = function (e) {\n      return _this.handleTechClick_(e);\n    };\n\n    _this.boundHandleTechDoubleClick_ = function (e) {\n      return _this.handleTechDoubleClick_(e);\n    };\n\n    _this.boundHandleTechTouchStart_ = function (e) {\n      return _this.handleTechTouchStart_(e);\n    };\n\n    _this.boundHandleTechTouchMove_ = function (e) {\n      return _this.handleTechTouchMove_(e);\n    };\n\n    _this.boundHandleTechTouchEnd_ = function (e) {\n      return _this.handleTechTouchEnd_(e);\n    };\n\n    _this.boundHandleTechTap_ = function (e) {\n      return _this.handleTechTap_(e);\n    }; // default isFullscreen_ to false\n\n\n    _this.isFullscreen_ = false; // create logger\n\n    _this.log = createLogger(_this.id_); // Hold our own reference to fullscreen api so it can be mocked in tests\n\n    _this.fsApi_ = FullscreenApi; // Tracks when a tech changes the poster\n\n    _this.isPosterFromTech_ = false; // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n\n    _this.queuedCallbacks_ = []; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    _this.isReady_ = false; // Init state hasStarted_\n\n    _this.hasStarted_ = false; // Init state userActive_\n\n    _this.userActive_ = false; // Init debugEnabled_\n\n    _this.debugEnabled_ = false; // Init state audioOnlyMode_\n\n    _this.audioOnlyMode_ = false; // Init state audioPosterMode_\n\n    _this.audioPosterMode_ = false; // Init state audioOnlyCache_\n\n    _this.audioOnlyCache_ = {\n      playerHeight: null,\n      hiddenChildren: []\n    }; // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    } // Store the original tag used to set options\n\n\n    _this.tag = tag; // Store the tag attributes used to restore html5 element\n\n    _this.tagAttributes = tag && getAttributes(tag); // Update current language\n\n    _this.language(_this.options_.language); // Update Supported Languages\n\n\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n      Object.getOwnPropertyNames(options.languages).forEach(function (name) {\n        languagesToLower[name.toLowerCase()] = options.languages[name];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    _this.resetCache_(); // Set poster\n\n\n    _this.poster_ = options.poster || ''; // Set controls\n\n    _this.controls_ = !!options.controls; // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n\n    tag.controls = false;\n    tag.removeAttribute('controls');\n    _this.changingSrc_ = false;\n    _this.playCallbacks_ = [];\n    _this.playTerminatedQueue_ = []; // the attribute overrides the option\n\n    if (tag.hasAttribute('autoplay')) {\n      _this.autoplay(true);\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    } // check plugins\n\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        if (typeof _this[name] !== 'function') {\n          throw new Error(\"plugin \\\"\" + name + \"\\\" does not exist\");\n        }\n      });\n    }\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n\n\n    _this.scrubbing_ = false;\n    _this.el_ = _this.createEl(); // Make this an evented object and use `el_` as its event bus.\n\n    evented(_assertThisInitialized(_this), {\n      eventBusKey: 'el_'\n    }); // listen to document and player fullscreenchange handlers so we receive those events\n    // before a user can receive them so we can update isFullscreen appropriately.\n    // make sure that we listen to fullscreenchange events before everything else to make sure that\n    // our isFullscreen method is updated properly for internal components as well as external.\n\n    if (_this.fsApi_.requestFullscreen) {\n      on(document, _this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n\n      _this.on(_this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n    }\n\n    if (_this.fluid_) {\n      _this.on(['playerreset', 'resize'], _this.boundUpdateStyleEl_);\n    } // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n\n\n    var playerOptionsCopy = mergeOptions$3(_this.options_); // Load plugins\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        _this[name](options.plugins[name]);\n      });\n    } // Enable debug mode to fire debugon event for all plugins.\n\n\n    if (options.debug) {\n      _this.debug(true);\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n    _this.middleware_ = [];\n\n    _this.playbackRates(options.playbackRates);\n\n    _this.initChildren(); // Set isAudio based on whether or not an audio tag was used\n\n\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio'); // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n\n\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    } // Set ARIA label and region role depending on player type\n\n\n    _this.el_.setAttribute('role', 'region');\n\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    } // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // TODO: Make this check be performed again when the window switches between monitors\n    // (See https://github.com/videojs/video.js/issues/5683)\n\n\n    if (TOUCH_ENABLED) {\n      _this.addClass('vjs-touch-enabled');\n    } // iOS Safari has broken hover handling\n\n\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    } // Make player easily findable by ID\n\n\n    Player.players[_this.id_] = _assertThisInitialized(_this); // Add a major version class to aid css in plugins\n\n    var majorVersion = version$5.split('.')[0];\n\n    _this.addClass(\"vjs-v\" + majorVersion); // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n\n\n    _this.userActive(true);\n\n    _this.reportUserActivity();\n\n    _this.one('play', function (e) {\n      return _this.listenForUserActivity_(e);\n    });\n\n    _this.on('stageclick', function (e) {\n      return _this.handleStageClick_(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on('languagechange', function (e) {\n      return _this.handleLanguagechange(e);\n    });\n\n    _this.breakpoints(_this.options_.breakpoints);\n\n    _this.responsive(_this.options_.responsive); // Calling both the audio mode methods after the player is fully\n    // setup to be able to listen to the events triggered by them\n\n\n    _this.on('ready', function () {\n      // Calling the audioPosterMode method first so that\n      // the audioOnlyMode can take precedence when both options are set to true\n      _this.audioPosterMode(_this.options_.audioPosterMode);\n\n      _this.audioOnlyMode(_this.options_.audioOnlyMode);\n    });\n\n    return _this;\n  }\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  var _proto = Player.prototype;\n\n  _proto.dispose = function dispose() {\n    var _this2 = this;\n\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n    this.trigger('dispose'); // prevent dispose from being called twice\n\n    this.off('dispose'); // Make sure all player-specific document listeners are unbound. This is\n\n    off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n    off(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    } // Kill reference to this player\n\n\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this); // remove all event handlers for track lists\n    // all tracks and track listeners are removed on\n    // tech dispose\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      var list = _this2[props.getterName](); // if it is not a native list\n      // we have to manually remove event listeners\n\n\n      if (list && list.off) {\n        list.off();\n      }\n    }); // the actual .el_ is removed here, or replaced if\n\n    _Component.prototype.dispose.call(this, {\n      restoreEl: this.options_.restoreEl\n    });\n  }\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var tag = this.tag;\n    var el;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    } // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n\n\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n      playerElIngest = this.playerElIngest_ = el; // move properties over from our custom `video-js` element\n      // to our new `video` element. This will move things like\n      // `src` or `controls` that were set via js before the player\n      // was initialized.\n\n      Object.keys(el).forEach(function (k) {\n        try {\n          tag[k] = el[k];\n        } catch (e) {// we got a a property like outerHTML which we can't actually copy, ignore it\n        }\n      });\n    } // set tabindex to -1 to remove the video element from the focus order\n\n\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1'; // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button), and\n    // for the same issue with Chrome (on Windows) with JAWS.\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 or Chrome if JAWS is not being used\n\n    if (IE_VERSION || IS_CHROME && IS_WINDOWS) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    } // Remove width/height attrs from tag so CSS can make it 100% width/height\n\n\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // don't copy over the class attribute to the player element when we're in a div embed\n      // the class is already set up properly in the divEmbed case\n      // and we want to make sure that the `video-js` class doesn't get lost\n      if (!(divEmbed && attr === 'class')) {\n        el.setAttribute(attr, attrs[attr]);\n      }\n\n      if (divEmbed) {\n        tag.setAttribute(attr, attrs[attr]);\n      }\n    }); // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech'; // Make player findable on elements\n\n    tag.player = el.player = this; // Default state of video is paused\n\n    this.addClass('vjs-paused'); // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false; // Pass in the width/height/aspectRatio options which will update the style el\n\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio); // support both crossOrigin and crossorigin to reduce confusion and issues around the name\n\n    this.crossOrigin(this.options_.crossOrigin || this.options_.crossorigin); // Hide any links within the video/audio tag,\n    // because IE doesn't hide them completely from screen readers.\n\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    } // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n\n\n    tag.initNetworkState_ = tag.networkState; // Wrap video tag in div (el/box) container\n\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    } // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n\n\n    prependTo(tag, el);\n    this.children_.unshift(tag); // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n\n    this.el_.setAttribute('lang', this.language_);\n    this.el_.setAttribute('translate', 'no');\n    this.el_ = el;\n    return el;\n  }\n  /**\n   * Get or set the `Player`'s crossOrigin option. For the HTML5 player, this\n   * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n   * behavior.\n   *\n   * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n   *\n   * @param {string} [value]\n   *        The value to set the `Player`'s crossOrigin to. If an argument is\n   *        given, must be one of `anonymous` or `use-credentials`.\n   *\n   * @return {string|undefined}\n   *         - The current crossOrigin value of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin(value) {\n    if (!value) {\n      return this.techGet_('crossOrigin');\n    }\n\n    if (value !== 'anonymous' && value !== 'use-credentials') {\n      log$1.warn(\"crossOrigin must be \\\"anonymous\\\" or \\\"use-credentials\\\", given \\\"\" + value + \"\\\"\");\n      return;\n    }\n\n    this.techCall_('setCrossOrigin', value);\n    return;\n  }\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n  ;\n\n  _proto.width = function width(value) {\n    return this.dimension('width', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n  ;\n\n  _proto.height = function height(value) {\n    return this.dimension('height', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n  ;\n\n  _proto.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '' || value === 'auto') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log$1.error(\"Improper value \\\"\" + value + \"\\\" supplied for for \" + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fluid = function fluid(bool) {\n    var _this3 = this;\n\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (isEvented(this)) {\n      this.off(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n    }\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n      addEventedCallback(this, function () {\n        _this3.on(['playerreset', 'resize'], _this3.boundUpdateStyleEl_);\n      });\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  }\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player`'s aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    } // Check for width:height format\n\n\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n\n    this.aspectRatio_ = ratio; // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n\n    this.fluid(true);\n    this.updateStyleEl_();\n  }\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n  ;\n\n  _proto.updateStyleEl_ = function updateStyleEl_() {\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width;\n    var height;\n    var aspectRatio;\n    var idClass; // The aspect ratio is either used directly or to calculate width and height.\n\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    } // Get the ratio as a decimal we can use to calculate dimensions\n\n\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    } // Ensure the CSS class is valid by starting with an alpha character\n\n\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    } // Ensure the right class is still on the player for the style element\n\n\n    this.addClass(idClass);\n    setTextContent(this.styleEl_, \"\\n      .\" + idClass + \" {\\n        width: \" + width + \"px;\\n        height: \" + height + \"px;\\n      }\\n\\n      .\" + idClass + \".vjs-fluid:not(.vjs-audio-only-mode) {\\n        padding-top: \" + ratioMultiplier * 100 + \"%;\\n      }\\n    \");\n  }\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadTech_ = function loadTech_(techName, source) {\n    var _this4 = this;\n\n    // Pause and remove current playback technology\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase$1(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1); // get rid of the HTML5 video tag as soon as we are using another tech\n\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    this.isReady_ = false;\n    var autoplay = this.autoplay(); // if autoplay is a string (or `true` with normalizeAutoplay: true) we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n\n    if (typeof this.autoplay() === 'string' || this.autoplay() === true && this.options_.normalizeAutoplay) {\n      autoplay = false;\n    } // Grab tech-specific options from player options and add source and parent element to use.\n\n\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + \"_\" + camelTechName + \"_api\",\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'disablePictureInPicture': this.options_.disablePictureInPicture,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset,\n      'Promise': this.options_.Promise\n    };\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      techOptions[props.getterName] = _this4[props.privateName];\n    });\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    } // Initialize tech instance\n\n\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error(\"No Tech named '\" + titleTechName + \"' exists! '\" + titleTechName + \"' should be registered using videojs.registerTech()'\");\n    }\n\n    this.tech_ = new TechClass(techOptions); // player.triggerReady is always async, so don't need this to be async\n\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_); // Listen to all HTML5-defined events and trigger them on the player\n\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (e) {\n        return _this4[\"handleTech\" + toTitleCase$1(event) + \"_\"](e);\n      });\n    });\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (eventObj) {\n        if (_this4.tech_.playbackRate() === 0 && _this4.tech_.seeking()) {\n          _this4.queuedCallbacks_.push({\n            callback: _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"].bind(_this4),\n            event: eventObj\n          });\n\n          return;\n        }\n\n        _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"](eventObj);\n      });\n    });\n    this.on(this.tech_, 'loadstart', function (e) {\n      return _this4.handleTechLoadStart_(e);\n    });\n    this.on(this.tech_, 'sourceset', function (e) {\n      return _this4.handleTechSourceset_(e);\n    });\n    this.on(this.tech_, 'waiting', function (e) {\n      return _this4.handleTechWaiting_(e);\n    });\n    this.on(this.tech_, 'ended', function (e) {\n      return _this4.handleTechEnded_(e);\n    });\n    this.on(this.tech_, 'seeking', function (e) {\n      return _this4.handleTechSeeking_(e);\n    });\n    this.on(this.tech_, 'play', function (e) {\n      return _this4.handleTechPlay_(e);\n    });\n    this.on(this.tech_, 'firstplay', function (e) {\n      return _this4.handleTechFirstPlay_(e);\n    });\n    this.on(this.tech_, 'pause', function (e) {\n      return _this4.handleTechPause_(e);\n    });\n    this.on(this.tech_, 'durationchange', function (e) {\n      return _this4.handleTechDurationChange_(e);\n    });\n    this.on(this.tech_, 'fullscreenchange', function (e, data) {\n      return _this4.handleTechFullscreenChange_(e, data);\n    });\n    this.on(this.tech_, 'fullscreenerror', function (e, err) {\n      return _this4.handleTechFullscreenError_(e, err);\n    });\n    this.on(this.tech_, 'enterpictureinpicture', function (e) {\n      return _this4.handleTechEnterPictureInPicture_(e);\n    });\n    this.on(this.tech_, 'leavepictureinpicture', function (e) {\n      return _this4.handleTechLeavePictureInPicture_(e);\n    });\n    this.on(this.tech_, 'error', function (e) {\n      return _this4.handleTechError_(e);\n    });\n    this.on(this.tech_, 'posterchange', function (e) {\n      return _this4.handleTechPosterChange_(e);\n    });\n    this.on(this.tech_, 'textdata', function (e) {\n      return _this4.handleTechTextData_(e);\n    });\n    this.on(this.tech_, 'ratechange', function (e) {\n      return _this4.handleTechRateChange_(e);\n    });\n    this.on(this.tech_, 'loadedmetadata', this.boundUpdateStyleEl_);\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    } // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n\n\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    } // Get rid of the original video tag reference after the first tech is loaded\n\n\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  }\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unloadTech_ = function unloadTech_() {\n    var _this5 = this;\n\n    // Save the current text tracks so that we can reuse the same text tracks with the next tech\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      _this5[props.privateName] = _this5[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n    this.isReady_ = false;\n    this.tech_.dispose();\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  }\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n  ;\n\n  _proto.tech = function tech(safety) {\n    if (safety === undefined) {\n      log$1.warn('Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\\n');\n    }\n\n    return this.tech_;\n  }\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n  ;\n\n  _proto.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_();\n    this.on(this.tech_, 'click', this.boundHandleTechClick_);\n    this.on(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_); // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n\n    this.on(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.boundHandleTechTouchEnd_); // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n\n    this.on(this.tech_, 'tap', this.boundHandleTechTap_);\n  }\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.boundHandleTechTap_);\n    this.off(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);\n    this.off(this.tech_, 'click', this.boundHandleTechClick_);\n    this.off(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);\n  }\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady(); // Keep the same volume as before\n\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    } // Look if the tech found a higher resolution poster while loading\n\n\n    this.handleTechPosterChange_(); // Update the duration if available\n\n    this.handleTechDurationChange_();\n  }\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking'); // reset the error state\n\n    this.error(null); // Update the duration\n\n    this.handleTechDurationChange_(); // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    } // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n\n\n    this.manualAutoplay_(this.autoplay() === true && this.options_.normalizeAutoplay ? 'play' : this.autoplay());\n  }\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n  ;\n\n  _proto.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this6 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    } // Save original muted() value, set muted to true, and attempt to play().\n    // On promise rejection, restore muted from saved value\n\n\n    var resolveMuted = function resolveMuted() {\n      var previouslyMuted = _this6.muted();\n\n      _this6.muted(true);\n\n      var restoreMuted = function restoreMuted() {\n        _this6.muted(previouslyMuted);\n      }; // restore muted on play terminatation\n\n\n      _this6.playTerminatedQueue_.push(restoreMuted);\n\n      var mutedPromise = _this6.play();\n\n      if (!isPromise(mutedPromise)) {\n        return;\n      }\n\n      return mutedPromise[\"catch\"](function (err) {\n        restoreMuted();\n        throw new Error(\"Rejection at manualAutoplay. Restoring muted value. \" + (err ? err : ''));\n      });\n    };\n\n    var promise; // if muted defaults to true\n    // the only thing we can do is call play\n\n    if (type === 'any' && !this.muted()) {\n      promise = this.play();\n\n      if (isPromise(promise)) {\n        promise = promise[\"catch\"](resolveMuted);\n      }\n    } else if (type === 'muted' && !this.muted()) {\n      promise = resolveMuted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!isPromise(promise)) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this6.trigger({\n        type: 'autoplay-success',\n        autoplay: type\n      });\n    })[\"catch\"](function () {\n      _this6.trigger({\n        type: 'autoplay-failure',\n        autoplay: type\n      });\n    });\n  }\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n  ;\n\n  _proto.updateSourceCaches_ = function updateSourceCaches_(srcObj) {\n    if (srcObj === void 0) {\n      srcObj = '';\n    }\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    } // make sure all the caches are set to default values\n    // to prevent null checking\n\n\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || []; // try to get the type of the src that was passed in\n\n    if (src && !type) {\n      type = findMimetype(this, src);\n    } // update `currentSource` cache always\n\n\n    this.cache_.source = mergeOptions$3({}, srcObj, {\n      src: src,\n      type: type\n    });\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    } // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n\n\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources; // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    } // update the tech `src` cache\n\n\n    this.cache_.src = src;\n  }\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n  ;\n\n  _proto.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this7 = this;\n\n    // only update the source cache when the source\n    // was not updated using the player api\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this7.updateSourceCaches_(src);\n      };\n\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src; // if we have a playerSrc that is not a blob, and a tech src that is a blob\n\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      } // update the source to the initial source right away\n      // in some cases this will be empty string\n\n\n      updateSourceCaches(eventSrc); // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n\n      if (!event.src) {\n        this.tech_.any(['sourceset', 'loadstart'], function (e) {\n          // if a sourceset happens before a `loadstart` there\n          // is nothing to do as this `handleTechSourceset_`\n          // will be called again and this will be handled there.\n          if (e.type === 'sourceset') {\n            return;\n          }\n\n          var techSrc = _this7.techGet('currentSrc');\n\n          _this7.lastSource_.tech = techSrc;\n\n          _this7.updateSourceCaches_(techSrc);\n        });\n      }\n    }\n\n    this.lastSource_ = {\n      player: this.currentSource().src,\n      tech: event.src\n    };\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  }\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n  ;\n\n  _proto.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  }\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // hide the poster when the user hits play\n\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('play');\n  }\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n  ;\n\n  _proto.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n\n    this.trigger('ratechange');\n  }\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n  ;\n\n  _proto.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this8 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('waiting'); // Browsers may emit a timeupdate event after a waiting event. In order to prevent\n    // premature removal of the waiting class, wait for the time to change.\n\n    var timeWhenWaiting = this.currentTime();\n\n    var timeUpdateListener = function timeUpdateListener() {\n      if (timeWhenWaiting !== _this8.currentTime()) {\n        _this8.removeClass('vjs-waiting');\n\n        _this8.off('timeupdate', timeUpdateListener);\n      }\n    };\n\n    this.on('timeupdate', timeUpdateListener);\n  }\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplay');\n  }\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplaythrough');\n  }\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('playing');\n  }\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeking');\n  }\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    this.removeClass('vjs-ended');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeked');\n  }\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n  ;\n\n  _proto.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log$1.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('firstplay');\n  }\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n  ;\n\n  _proto.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('pause');\n  }\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n  ;\n\n  _proto.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n    this.removeClass('vjs-waiting');\n\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('ended');\n  }\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  }\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#click\n   * @private\n   */\n  ;\n\n  _proto.handleTechClick_ = function handleTechClick_(event) {\n    // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.click === undefined || this.options_.userActions.click !== false) {\n      if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.click === 'function') {\n        this.options_.userActions.click.call(this, event);\n      } else if (this.paused()) {\n        silencePromise(this.play());\n      } else {\n        this.pause();\n      }\n    }\n  }\n  /**\n   * Handle a double-click on the media element to enter/exit fullscreen\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#dblclick\n   * @private\n   */\n  ;\n\n  _proto.handleTechDoubleClick_ = function handleTechDoubleClick_(event) {\n    if (!this.controls_) {\n      return;\n    } // we do not want to toggle fullscreen state\n    // when double-clicking inside a control bar or a modal\n\n\n    var inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), function (el) {\n      return el.contains(event.target);\n    });\n\n    if (!inAllowedEls) {\n      /*\n       * options.userActions.doubleClick\n       *\n       * If `undefined` or `true`, double-click toggles fullscreen if controls are present\n       * Set to `false` to disable double-click handling\n       * Set to a function to substitute an external double-click handler\n       */\n      if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {\n        if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {\n          this.options_.userActions.doubleClick.call(this, event);\n        } else if (this.isFullscreen()) {\n          this.exitFullscreen();\n        } else {\n          this.requestFullscreen();\n        }\n      }\n    }\n  }\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n  ;\n\n  _proto.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  }\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  }\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  }\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    if (event.cancelable) {\n      event.preventDefault();\n    }\n  }\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n  ;\n\n  _proto.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.toggleFullscreenClass_ = function toggleFullscreenClass_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  }\n  /**\n   * when the document fschange event triggers it calls this\n   */\n  ;\n\n  _proto.documentFullscreenChange_ = function documentFullscreenChange_(e) {\n    var targetPlayer = e.target.player; // if another player was fullscreen\n    // do a null check for targetPlayer because older firefox's would put document as e.target\n\n    if (targetPlayer && targetPlayer !== this) {\n      return;\n    }\n\n    var el = this.el();\n    var isFs = document[this.fsApi_.fullscreenElement] === el;\n\n    if (!isFs && el.matches) {\n      isFs = el.matches(':' + this.fsApi_.fullscreen);\n    } else if (!isFs && el.msMatchesSelector) {\n      isFs = el.msMatchesSelector(':' + this.fsApi_.fullscreen);\n    }\n\n    this.isFullscreen(isFs);\n  }\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    var _this9 = this;\n\n    if (data) {\n      if (data.nativeIOSFullscreen) {\n        this.addClass('vjs-ios-native-fs');\n        this.tech_.one('webkitendfullscreen', function () {\n          _this9.removeClass('vjs-ios-native-fs');\n        });\n      }\n\n      this.isFullscreen(data.isFullscreen);\n    }\n  };\n\n  _proto.handleTechFullscreenError_ = function handleTechFullscreenError_(event, err) {\n    this.trigger('fullscreenerror', err);\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.togglePictureInPictureClass_ = function togglePictureInPictureClass_() {\n    if (this.isInPictureInPicture()) {\n      this.addClass('vjs-picture-in-picture');\n    } else {\n      this.removeClass('vjs-picture-in-picture');\n    }\n  }\n  /**\n   * Handle Tech Enter Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the enterpictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#enterpictureinpicture\n   */\n  ;\n\n  _proto.handleTechEnterPictureInPicture_ = function handleTechEnterPictureInPicture_(event) {\n    this.isInPictureInPicture(true);\n  }\n  /**\n   * Handle Tech Leave Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the leavepictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#leavepictureinpicture\n   */\n  ;\n\n  _proto.handleTechLeavePictureInPicture_ = function handleTechLeavePictureInPicture_(event) {\n    this.isInPictureInPicture(false);\n  }\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n  ;\n\n  _proto.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n    this.error(error);\n  }\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n  ;\n\n  _proto.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('textdata', data);\n  }\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n  ;\n\n  _proto.getCache = function getCache() {\n    return this.cache_;\n  }\n  /**\n   * Resets the internal cache object.\n   *\n   * Using this function outside the player constructor or reset method may\n   * have unintended side-effects.\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetCache_ = function resetCache_() {\n    this.cache_ = {\n      // Right now, the currentTime is not _really_ cached because it is always\n      // retrieved from the tech (see: currentTime). However, for completeness,\n      // we set it to zero here to ensure that if we do start actually caching\n      // it, we reset it along with everything else.\n      currentTime: 0,\n      initTime: 0,\n      inactivityTimeout: this.options_.inactivityTimeout,\n      duration: NaN,\n      lastVolume: 1,\n      lastPlaybackRate: this.defaultPlaybackRate(),\n      media: null,\n      src: '',\n      source: {},\n      sources: [],\n      playbackRates: [],\n      volume: 1\n    };\n  }\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n  ;\n\n  _proto.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log$1(e);\n        throw e;\n      }\n    }, true);\n  }\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n  ;\n\n  _proto.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    } // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // TODO: Is this needed for techs other than Flash?\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n\n\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log$1(\"Video.js: \" + method + \" method not defined for \" + this.techName_ + \" playback technology.\", e);\n        throw e;\n      } // When a method isn't available on the object it throws a TypeError\n\n\n      if (e.name === 'TypeError') {\n        log$1(\"Video.js: \" + method + \" unavailable on \" + this.techName_ + \" playback technology element.\", e);\n        this.tech_.isReady_ = false;\n        throw e;\n      } // If error unknown, just log and throw\n\n\n      log$1(e);\n      throw e;\n    }\n  }\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n  ;\n\n  _proto.play = function play() {\n    var _this10 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this10.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  }\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n  ;\n\n  _proto.play_ = function play_(callback) {\n    var _this11 = this;\n\n    if (callback === void 0) {\n      callback = silencePromise;\n    }\n\n    this.playCallbacks_.push(callback);\n    var isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc()));\n    var isSafariOrIOS = Boolean(IS_ANY_SAFARI || IS_IOS); // treat calls to play_ somewhat like the `one` event function\n\n    if (this.waitToPlay_) {\n      this.off(['ready', 'loadstart'], this.waitToPlay_);\n      this.waitToPlay_ = null;\n    } // if the player/tech is not ready or the src itself is not ready\n    // queue up a call to play on `ready` or `loadstart`\n\n\n    if (!this.isReady_ || !isSrcReady) {\n      this.waitToPlay_ = function (e) {\n        _this11.play_();\n      };\n\n      this.one(['ready', 'loadstart'], this.waitToPlay_); // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod\n      // in that case, we need to prime the video element by calling load so it'll be ready in time\n\n      if (!isSrcReady && isSafariOrIOS) {\n        this.load();\n      }\n\n      return;\n    } // If the player/tech is ready and we have a source, we can attempt playback.\n\n\n    var val = this.techGet_('play'); // For native playback, reset the progress bar if we get a play call from a replay.\n\n    var isNativeReplay = isSafariOrIOS && this.hasClass('vjs-ended');\n\n    if (isNativeReplay) {\n      this.resetProgressBar_();\n    } // play was terminated if the returned value is null\n\n\n    if (val === null) {\n      this.runPlayTerminatedQueue_();\n    } else {\n      this.runPlayCallbacks_(val);\n    }\n  }\n  /**\n   * These functions will be run when if play is terminated. If play\n   * runPlayCallbacks_ is run these function will not be run. This allows us\n   * to differenciate between a terminated play and an actual call to play.\n   */\n  ;\n\n  _proto.runPlayTerminatedQueue_ = function runPlayTerminatedQueue_() {\n    var queue = this.playTerminatedQueue_.slice(0);\n    this.playTerminatedQueue_ = [];\n    queue.forEach(function (q) {\n      q();\n    });\n  }\n  /**\n   * When a callback to play is delayed we have to run these\n   * callbacks when play is actually called on the tech. This function\n   * runs the callbacks that were delayed and accepts the return value\n   * from the tech.\n   *\n   * @param {undefined|Promise} val\n   *        The return value from the tech.\n   */\n  ;\n\n  _proto.runPlayCallbacks_ = function runPlayCallbacks_(val) {\n    var callbacks = this.playCallbacks_.slice(0);\n    this.playCallbacks_ = []; // clear play terminatedQueue since we finished a real play\n\n    this.playTerminatedQueue_ = [];\n    callbacks.forEach(function (cb) {\n      cb(val);\n    });\n  }\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n  ;\n\n  _proto.pause = function pause() {\n    this.techCall_('pause');\n  }\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n  ;\n\n  _proto.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  }\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n  ;\n\n  _proto.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  }\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        whether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n\n    this.scrubbing_ = !!isScrubbing;\n    this.techCall_('setScrubbing', this.scrubbing_);\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  }\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n  ;\n\n  _proto.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n\n      if (!this.isReady_ || this.changingSrc_ || !this.tech_ || !this.tech_.isReady_) {\n        this.cache_.initTime = seconds;\n        this.off('canplay', this.boundApplyInitTime_);\n        this.one('canplay', this.boundApplyInitTime_);\n        return;\n      }\n\n      this.techCall_('setCurrentTime', seconds);\n      this.cache_.initTime = 0;\n      return;\n    } // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n\n\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  }\n  /**\n   * Apply the value of initTime stored in cache as currentTime.\n   *\n   * @private\n   */\n  ;\n\n  _proto.applyInitTime_ = function applyInitTime_() {\n    this.currentTime(this.cache_.initTime);\n  }\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and depending on preload behaviour may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n  ;\n\n  _proto.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds); // Standardize on Infinity for signaling video is live\n\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      // TODO: Required for techs other than Flash?\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n      } else {\n        this.removeClass('vjs-live');\n      }\n\n      if (!isNaN(seconds)) {\n        // Do not fire durationchange unless the duration value is known.\n        // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n        /**\n         * @event Player#durationchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('durationchange');\n      }\n    }\n  }\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  }\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  } //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  }\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is buffered 0 being 0% and 1 being 100%\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  }\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n  ;\n\n  _proto.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  }\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n  ;\n\n  _proto.volume = function volume(percentAsDecimal) {\n    var vol;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    } // Default to 1 when returning current volume.\n\n\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  }\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n  ;\n\n  _proto.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n\n    return this.techGet_('muted') || false;\n  }\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on initial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n  ;\n\n  _proto.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n\n    return this.techGet_('defaultMuted') || false;\n  }\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n  ;\n\n  _proto.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n\n    return this.cache_.lastVolume;\n  }\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  }\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n  ;\n\n  _proto.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      var oldValue = this.isFullscreen_;\n      this.isFullscreen_ = Boolean(isFS); // if we changed fullscreen state and we're in prefixed mode, trigger fullscreenchange\n      // this is the only place where we trigger fullscreenchange events for older browsers\n      // fullWindow mode is treated as a prefixed event and will get a fullscreenchange event as well\n\n      if (this.isFullscreen_ !== oldValue && this.fsApi_.prefixed) {\n        /**\n           * @event Player#fullscreenchange\n           * @type {EventTarget~Event}\n           */\n        this.trigger('fullscreenchange');\n      }\n\n      this.toggleFullscreenClass_();\n      return;\n    }\n\n    return this.isFullscreen_;\n  }\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @param  {Object} [fullscreenOptions]\n   *         Override the player fullscreen options\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.requestFullscreen = function requestFullscreen(fullscreenOptions) {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.requestFullscreenHelper_(fullscreenOptions);\n\n        if (promise) {\n          promise.then(offHandler, offHandler);\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.requestFullscreenHelper_();\n  };\n\n  _proto.requestFullscreenHelper_ = function requestFullscreenHelper_(fullscreenOptions) {\n    var _this12 = this;\n\n    var fsOptions; // Only pass fullscreen options to requestFullscreen in spec-compliant browsers.\n    // Use defaults or player configured option unless passed directly to this method.\n\n    if (!this.fsApi_.prefixed) {\n      fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};\n\n      if (fullscreenOptions !== undefined) {\n        fsOptions = fullscreenOptions;\n      }\n    } // This method works as follows:\n    // 1. if a fullscreen api is available, use it\n    //   1. call requestFullscreen with potential options\n    //   2. if we got a promise from above, use it to update isFullscreen()\n    // 2. otherwise, if the tech supports fullscreen, call `enterFullScreen` on it.\n    //   This is particularly used for iPhone, older iPads, and non-safari browser on iOS.\n    // 3. otherwise, use \"fullWindow\" mode\n\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = this.el_[this.fsApi_.requestFullscreen](fsOptions);\n\n      if (promise) {\n        promise.then(function () {\n          return _this12.isFullscreen(true);\n        }, function () {\n          return _this12.isFullscreen(false);\n        });\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n    }\n  }\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.exitFullscreen = function exitFullscreen() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.exitFullscreenHelper_();\n\n        if (promise) {\n          promise.then(offHandler, offHandler); // map the promise to our resolve/reject methods\n\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.exitFullscreenHelper_();\n  };\n\n  _proto.exitFullscreenHelper_ = function exitFullscreenHelper_() {\n    var _this13 = this;\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = document[this.fsApi_.exitFullscreen]();\n\n      if (promise) {\n        // we're splitting the promise here, so, we want to catch the\n        // potential error so that this chain doesn't have unhandled errors\n        silencePromise(promise.then(function () {\n          return _this13.isFullscreen(false);\n        }));\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n    }\n  }\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n  ;\n\n  _proto.enterFullWindow = function enterFullWindow() {\n    this.isFullscreen(true);\n    this.isFullWindow = true; // Storing original doc overflow value to return to when fullscreen is off\n\n    this.docOrigOverflow = document.documentElement.style.overflow; // Add listener for esc key to exit fullscreen\n\n    on(document, 'keydown', this.boundFullWindowOnEscKey_); // Hide any scroll bars\n\n    document.documentElement.style.overflow = 'hidden'; // Apply fullscreen styles\n\n    addClass(document.body, 'vjs-full-window');\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('enterFullWindow');\n  }\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n  ;\n\n  _proto.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      if (this.isFullscreen() === true) {\n        if (!this.isFullWindow) {\n          this.exitFullscreen();\n        } else {\n          this.exitFullWindow();\n        }\n      }\n    }\n  }\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n  ;\n\n  _proto.exitFullWindow = function exitFullWindow() {\n    this.isFullscreen(false);\n    this.isFullWindow = false;\n    off(document, 'keydown', this.boundFullWindowOnEscKey_); // Unhide scroll bars.\n\n    document.documentElement.style.overflow = this.docOrigOverflow; // Remove fullscreen styles\n\n    removeClass(document.body, 'vjs-full-window'); // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('exitFullWindow');\n  }\n  /**\n   * Disable Picture-in-Picture mode.\n   *\n   * @param {boolean} value\n   *                  - true will disable Picture-in-Picture mode\n   *                  - false will enable Picture-in-Picture mode\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture(value) {\n    if (value === undefined) {\n      return this.techGet_('disablePictureInPicture');\n    }\n\n    this.techCall_('setDisablePictureInPicture', value);\n    this.options_.disablePictureInPicture = value;\n    this.trigger('disablepictureinpicturechanged');\n  }\n  /**\n   * Check if the player is in Picture-in-Picture mode or tell the player that it\n   * is or is not in Picture-in-Picture mode.\n   *\n   * @param  {boolean} [isPiP]\n   *         Set the players current Picture-in-Picture state\n   *\n   * @return {boolean}\n   *         - true if Picture-in-Picture is on and getting\n   *         - false if Picture-in-Picture is off and getting\n   */\n  ;\n\n  _proto.isInPictureInPicture = function isInPictureInPicture(isPiP) {\n    if (isPiP !== undefined) {\n      this.isInPictureInPicture_ = !!isPiP;\n      this.togglePictureInPictureClass_();\n      return;\n    }\n\n    return !!this.isInPictureInPicture_;\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#enterpictureinpicture\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    if ('pictureInPictureEnabled' in document && this.disablePictureInPicture() === false) {\n      /**\n       * This event fires when the player enters picture in picture mode\n       *\n       * @event Player#enterpictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return this.techGet_('requestPictureInPicture');\n    }\n  }\n  /**\n   * Exit Picture-in-Picture mode.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#leavepictureinpicture\n   *\n   * @return {Promise}\n   *         A promise.\n   */\n  ;\n\n  _proto.exitPictureInPicture = function exitPictureInPicture() {\n    if ('pictureInPictureEnabled' in document) {\n      /**\n       * This event fires when the player leaves picture in picture mode\n       *\n       * @event Player#leavepictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return document.exitPictureInPicture();\n    }\n  }\n  /**\n   * Called when this Player has focus and a key gets pressed down, or when\n   * any Component of this player receives a key press that it doesn't handle.\n   * This allows player-wide hotkeys (either as defined below, or optionally\n   * by an external function).\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var userActions = this.options_.userActions; // Bail out if hotkeys are not configured.\n\n    if (!userActions || !userActions.hotkeys) {\n      return;\n    } // Function that determines whether or not to exclude an element from\n    // hotkeys handling.\n\n\n    var excludeElement = function excludeElement(el) {\n      var tagName = el.tagName.toLowerCase(); // The first and easiest test is for `contenteditable` elements.\n\n      if (el.isContentEditable) {\n        return true;\n      } // Inputs matching these types will still trigger hotkey handling as\n      // they are not text inputs.\n\n\n      var allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];\n\n      if (tagName === 'input') {\n        return allowedInputTypes.indexOf(el.type) === -1;\n      } // The final test is by tag name. These tags will be excluded entirely.\n\n\n      var excludedTags = ['textarea'];\n      return excludedTags.indexOf(tagName) !== -1;\n    }; // Bail out if the user is focused on an interactive form element.\n\n\n    if (excludeElement(this.el_.ownerDocument.activeElement)) {\n      return;\n    }\n\n    if (typeof userActions.hotkeys === 'function') {\n      userActions.hotkeys.call(this, event);\n    } else {\n      this.handleHotkeys(event);\n    }\n  }\n  /**\n   * Called when this Player receives a hotkey keydown event.\n   * Supported player-wide hotkeys are:\n   *\n   *   f          - toggle fullscreen\n   *   m          - toggle mute\n   *   k or Space - toggle play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleHotkeys = function handleHotkeys(event) {\n    var hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {}; // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set\n\n    var _hotkeys$fullscreenKe = hotkeys.fullscreenKey,\n        fullscreenKey = _hotkeys$fullscreenKe === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'f');\n    } : _hotkeys$fullscreenKe,\n        _hotkeys$muteKey = hotkeys.muteKey,\n        muteKey = _hotkeys$muteKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'm');\n    } : _hotkeys$muteKey,\n        _hotkeys$playPauseKey = hotkeys.playPauseKey,\n        playPauseKey = _hotkeys$playPauseKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space');\n    } : _hotkeys$playPauseKey;\n\n    if (fullscreenKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var FSToggle = Component$1.getComponent('FullscreenToggle');\n\n      if (document[this.fsApi_.fullscreenEnabled] !== false) {\n        FSToggle.prototype.handleClick.call(this, event);\n      }\n    } else if (muteKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var MuteToggle = Component$1.getComponent('MuteToggle');\n      MuteToggle.prototype.handleClick.call(this, event);\n    } else if (playPauseKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var PlayToggle = Component$1.getComponent('PlayToggle');\n      PlayToggle.prototype.handleClick.call(this, event);\n    }\n  }\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType(type) {\n    var can; // Loop through each playback technology in the options order\n\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n\n      if (!tech) {\n        tech = Component$1.getComponent(techName);\n      } // Check if the current tech is defined before continuing\n\n\n      if (!tech) {\n        log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n        continue;\n      } // Check if the browser supports this technology\n\n\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  }\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n  ;\n\n  _proto.selectSource = function selectSource(sources) {\n    var _this14 = this;\n\n    // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1];\n\n      // Check if the current tech is defined before continuing\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n      return false;\n    }); // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found;\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n      return found;\n    };\n\n    var foundSourceAndTech;\n\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this14.options_[techName.toLowerCase()])) {\n        return {\n          source: source,\n          tech: techName\n        };\n      }\n    }; // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n\n\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  }\n  /**\n   * Executes source setting and getting logic\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   * @param {boolean} isRetry\n   *        Indicates whether this is being called internally as a result of a retry\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.handleSrc_ = function handleSrc_(source, isRetry) {\n    var _this15 = this;\n\n    // getter usage\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    } // Reset retry behavior for new source\n\n\n    if (this.resetRetryOnError_) {\n      this.resetRetryOnError_();\n    } // filter out invalid sources and turn our source into\n    // an array of source objects\n\n\n    var sources = filterSource(source); // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({\n          code: 4,\n          message: this.options_.notSupportedMessage\n        });\n      }, 0);\n      return;\n    } // initial sources\n\n\n    this.changingSrc_ = true; // Only update the cached source list if we are not retrying a new source after error,\n    // since in that case we want to include the failed source(s) in the cache\n\n    if (!isRetry) {\n      this.cache_.sources = sources;\n    }\n\n    this.updateSourceCaches_(sources[0]); // middlewareSource is the source after it has been changed by middleware\n\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this15.middleware_ = mws; // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n\n      if (!isRetry) {\n        _this15.cache_.sources = sources;\n      }\n\n      _this15.updateSourceCaches_(middlewareSource);\n\n      var err = _this15.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this15.handleSrc_(sources.slice(1));\n        }\n\n        _this15.changingSrc_ = false; // We need to wrap this in a timeout to give folks a chance to add error event handlers\n\n        _this15.setTimeout(function () {\n          this.error({\n            code: 4,\n            message: this.options_.notSupportedMessage\n          });\n        }, 0); // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n\n\n        _this15.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this15.tech_);\n    }); // Try another available source if this one fails before playback.\n\n    if (this.options_.retryOnError && sources.length > 1) {\n      var retry = function retry() {\n        // Remove the error modal\n        _this15.error(null);\n\n        _this15.handleSrc_(sources.slice(1), true);\n      };\n\n      var stopListeningForErrors = function stopListeningForErrors() {\n        _this15.off('error', retry);\n      };\n\n      this.one('error', retry);\n      this.one('playing', stopListeningForErrors);\n\n      this.resetRetryOnError_ = function () {\n        _this15.off('error', retry);\n\n        _this15.off('playing', stopListeningForErrors);\n      };\n    }\n  }\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.src = function src(source) {\n    return this.handleSrc_(source, false);\n  }\n  /**\n   * Set the source object on the tech, returns a boolean that indicates whether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n  ;\n\n  _proto.src_ = function src_(source) {\n    var _this16 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true; // load this technology with the chosen source\n\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this16.changingSrc_ = false;\n      });\n      return false;\n    } // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n\n\n    this.ready(function () {\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n    return false;\n  }\n  /**\n   * Begin loading the src data.\n   */\n  ;\n\n  _proto.load = function load() {\n    this.techCall_('load');\n  }\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    var _this17 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (this.paused() || !PromiseClass) {\n      this.doReset_();\n    } else {\n      var playPromise = this.play();\n      silencePromise(playPromise.then(function () {\n        return _this17.doReset_();\n      }));\n    }\n  };\n\n  _proto.doReset_ = function doReset_() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n\n    this.resetCache_();\n    this.poster('');\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n    this.resetControlBarUI_();\n\n    if (isEvented(this)) {\n      this.trigger('playerreset');\n    }\n  }\n  /**\n   * Reset Control Bar's UI by calling sub-methods that reset\n   * all of Control Bar's components\n   */\n  ;\n\n  _proto.resetControlBarUI_ = function resetControlBarUI_() {\n    this.resetProgressBar_();\n    this.resetPlaybackRate_();\n    this.resetVolumeBar_();\n  }\n  /**\n   * Reset tech's progress so progress bar is reset in the UI\n   */\n  ;\n\n  _proto.resetProgressBar_ = function resetProgressBar_() {\n    this.currentTime(0);\n\n    var _ref3 = this.controlBar || {},\n        durationDisplay = _ref3.durationDisplay,\n        remainingTimeDisplay = _ref3.remainingTimeDisplay;\n\n    if (durationDisplay) {\n      durationDisplay.updateContent();\n    }\n\n    if (remainingTimeDisplay) {\n      remainingTimeDisplay.updateContent();\n    }\n  }\n  /**\n   * Reset Playback ratio\n   */\n  ;\n\n  _proto.resetPlaybackRate_ = function resetPlaybackRate_() {\n    this.playbackRate(this.defaultPlaybackRate());\n    this.handleTechRateChange_();\n  }\n  /**\n   * Reset Volume bar\n   */\n  ;\n\n  _proto.resetVolumeBar_ = function resetVolumeBar_() {\n    this.volume(1.0);\n    this.trigger('volumechange');\n  }\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n  ;\n\n  _proto.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = []; // assume `{}` or `{ src }`\n\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  }\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n  ;\n\n  _proto.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  }\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  }\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n  ;\n\n  _proto.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  }\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false means that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n  ;\n\n  _proto.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n\n    return this.techGet_('preload');\n  }\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n  ;\n\n  _proto.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay; // if the value is a valid string set it to that, or normalize `true` to 'play', if need be\n\n    if (typeof value === 'string' && /(any|play|muted)/.test(value) || value === true && this.options_.normalizeAutoplay) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(typeof value === 'string' ? value : 'play');\n      techAutoplay = false; // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false; // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay; // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  }\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n  ;\n\n  _proto.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n\n    return this.techGet_('playsinline');\n  }\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {boolean}\n   *         The current value of loop when getting\n   */\n  ;\n\n  _proto.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n\n    return this.techGet_('loop');\n  }\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n  ;\n\n  _proto.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    } // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n\n\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    } // update the internal poster variable\n\n\n    this.poster_ = src; // update the tech's poster\n\n    this.techCall_('setPoster', src);\n    this.isPosterFromTech_ = false; // alert components that the poster has been set\n\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('posterchange');\n  }\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true; // Let components know the poster has changed\n\n        this.trigger('posterchange');\n      }\n    }\n  }\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n  ;\n\n  _proto.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsenabled');\n\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsdisabled');\n\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  }\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls) or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n  ;\n\n  _proto.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingcustomcontrols');\n    }\n  }\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n  ;\n\n  _proto.error = function error(err) {\n    var _this18 = this;\n\n    if (err === undefined) {\n      return this.error_ || null;\n    } // allow hooks to modify error object\n\n\n    hooks('beforeerror').forEach(function (hookFunction) {\n      var newErr = hookFunction(_this18, err);\n\n      if (!(isObject(newErr) && !Array.isArray(newErr) || typeof newErr === 'string' || typeof newErr === 'number' || newErr === null)) {\n        _this18.log.error('please return a value that MediaError expects in beforeerror hooks');\n\n        return;\n      }\n\n      err = newErr;\n    }); // Suppress the first error message for no compatible source until\n    // user interaction\n\n    if (this.options_.suppressNotSupportedError && err && err.code === 4) {\n      var triggerSuppressedError = function triggerSuppressedError() {\n        this.error(err);\n      };\n\n      this.options_.suppressNotSupportedError = false;\n      this.any(['click', 'touchstart'], triggerSuppressedError);\n      this.one('loadstart', function () {\n        this.off(['click', 'touchstart'], triggerSuppressedError);\n      });\n      return;\n    } // restoring to default\n\n\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n\n      return;\n    }\n\n    this.error_ = new MediaError(err); // add the vjs-error classname to the player\n\n    this.addClass('vjs-error'); // log the name of the error type and any message\n    // IE11 logs \"[object object]\" and required you to expand message to see error object\n\n    log$1.error(\"(CODE:\" + this.error_.code + \" \" + MediaError.errorTypes[this.error_.code] + \")\", this.error_.message, this.error_);\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('error'); // notify hooks of the per player error\n\n    hooks('error').forEach(function (hookFunction) {\n      return hookFunction(_this18, _this18.error_);\n    });\n    return;\n  }\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n  ;\n\n  _proto.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  }\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n  ;\n\n  _proto.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('useractive');\n      return;\n    } // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n\n\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('userinactive');\n  }\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n  ;\n\n  _proto.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress;\n    var lastMoveX;\n    var lastMoveY;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(mouseInProgress); // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUpAndMouseLeave = function handleMouseUpAndMouseLeave(event) {\n      handleActivity(); // Stop the interval that maintains activity if the mouse/touch is down\n\n      this.clearInterval(mouseInProgress);\n    }; // Any mouse movement will be considered user activity\n\n\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUpAndMouseLeave);\n    this.on('mouseleave', handleMouseUpAndMouseLeave);\n    var controlBar = this.getChild('controlBar'); // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)\n    // controlBar would no longer be hidden by default timeout.\n\n    if (controlBar && !IS_IOS && !IS_ANDROID) {\n      controlBar.on('mouseenter', function (event) {\n        if (this.player().options_.inactivityTimeout !== 0) {\n          this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;\n        }\n\n        this.player().options_.inactivityTimeout = 0;\n      });\n      controlBar.on('mouseleave', function (event) {\n        this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;\n      });\n    } // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n\n\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity); // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n\n    var inactivityTimeout;\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      } // Reset the activity tracker\n\n\n      this.userActivity_ = false; // If the user state was inactive, set the state to active\n\n      this.userActive(true); // Clear any existing inactivity timeout to start the timer over\n\n      this.clearTimeout(inactivityTimeout);\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      } // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n\n\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  }\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n  ;\n\n  _proto.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n  ;\n\n  _proto.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n  ;\n\n  _proto.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  };\n\n  _proto.enableAudioOnlyUI_ = function enableAudioOnlyUI_() {\n    var _this19 = this;\n\n    // Update styling immediately to show the control bar so we can get its height\n    this.addClass('vjs-audio-only-mode');\n    var playerChildren = this.children();\n    var controlBar = this.getChild('ControlBar');\n    var controlBarHeight = controlBar && controlBar.currentHeight(); // Hide all player components except the control bar. Control bar components\n    // needed only for video are hidden with CSS\n\n    playerChildren.forEach(function (child) {\n      if (child === controlBar) {\n        return;\n      }\n\n      if (child.el_ && !child.hasClass('vjs-hidden')) {\n        child.hide();\n\n        _this19.audioOnlyCache_.hiddenChildren.push(child);\n      }\n    });\n    this.audioOnlyCache_.playerHeight = this.currentHeight(); // Set the player height the same as the control bar\n\n    this.height(controlBarHeight);\n    this.trigger('audioonlymodechange');\n  };\n\n  _proto.disableAudioOnlyUI_ = function disableAudioOnlyUI_() {\n    this.removeClass('vjs-audio-only-mode'); // Show player components that were previously hidden\n\n    this.audioOnlyCache_.hiddenChildren.forEach(function (child) {\n      return child.show();\n    }); // Reset player height\n\n    this.height(this.audioOnlyCache_.playerHeight);\n    this.trigger('audioonlymodechange');\n  }\n  /**\n   * Get the current audioOnlyMode state or set audioOnlyMode to true or false.\n   *\n   * Setting this to `true` will hide all player components except the control bar,\n   * as well as control bar components needed only for video.\n   *\n   * @param {boolean} [value]\n   *         The value to set audioOnlyMode to.\n   *\n   * @return {Promise|boolean}\n   *        A Promise is returned when setting the state, and a boolean when getting\n   *        the present state\n   */\n  ;\n\n  _proto.audioOnlyMode = function audioOnlyMode(value) {\n    var _this20 = this;\n\n    if (typeof value !== 'boolean' || value === this.audioOnlyMode_) {\n      return this.audioOnlyMode_;\n    }\n\n    this.audioOnlyMode_ = value;\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      // Enable Audio Only Mode\n      if (value) {\n        var exitPromises = []; // Fullscreen and PiP are not supported in audioOnlyMode, so exit if we need to.\n\n        if (this.isInPictureInPicture()) {\n          exitPromises.push(this.exitPictureInPicture());\n        }\n\n        if (this.isFullscreen()) {\n          exitPromises.push(this.exitFullscreen());\n        }\n\n        if (this.audioPosterMode()) {\n          exitPromises.push(this.audioPosterMode(false));\n        }\n\n        return PromiseClass.all(exitPromises).then(function () {\n          return _this20.enableAudioOnlyUI_();\n        });\n      } // Disable Audio Only Mode\n\n\n      return PromiseClass.resolve().then(function () {\n        return _this20.disableAudioOnlyUI_();\n      });\n    }\n\n    if (value) {\n      if (this.isInPictureInPicture()) {\n        this.exitPictureInPicture();\n      }\n\n      if (this.isFullscreen()) {\n        this.exitFullscreen();\n      }\n\n      this.enableAudioOnlyUI_();\n    } else {\n      this.disableAudioOnlyUI_();\n    }\n  };\n\n  _proto.enablePosterModeUI_ = function enablePosterModeUI_() {\n    // Hide the video element and show the poster image to enable posterModeUI\n    var tech = this.tech_ && this.tech_;\n    tech.hide();\n    this.addClass('vjs-audio-poster-mode');\n    this.trigger('audiopostermodechange');\n  };\n\n  _proto.disablePosterModeUI_ = function disablePosterModeUI_() {\n    // Show the video element and hide the poster image to disable posterModeUI\n    var tech = this.tech_ && this.tech_;\n    tech.show();\n    this.removeClass('vjs-audio-poster-mode');\n    this.trigger('audiopostermodechange');\n  }\n  /**\n   * Get the current audioPosterMode state or set audioPosterMode to true or false\n   *\n   * @param {boolean} [value]\n   *         The value to set audioPosterMode to.\n   *\n   * @return {Promise|boolean}\n   *         A Promise is returned when setting the state, and a boolean when getting\n   *        the present state\n   */\n  ;\n\n  _proto.audioPosterMode = function audioPosterMode(value) {\n    var _this21 = this;\n\n    if (typeof value !== 'boolean' || value === this.audioPosterMode_) {\n      return this.audioPosterMode_;\n    }\n\n    this.audioPosterMode_ = value;\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      if (value) {\n        if (this.audioOnlyMode()) {\n          var audioOnlyModePromise = this.audioOnlyMode(false);\n          return audioOnlyModePromise.then(function () {\n            // enable audio poster mode after audio only mode is disabled\n            _this21.enablePosterModeUI_();\n          });\n        }\n\n        return PromiseClass.resolve().then(function () {\n          // enable audio poster mode\n          _this21.enablePosterModeUI_();\n        });\n      }\n\n      return PromiseClass.resolve().then(function () {\n        // disable audio poster mode\n        _this21.disablePosterModeUI_();\n      });\n    }\n\n    if (value) {\n      if (this.audioOnlyMode()) {\n        this.audioOnlyMode(false);\n      }\n\n      this.enablePosterModeUI_();\n      return;\n    }\n\n    this.disablePosterModeUI_();\n  }\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  }\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}.\n   * When manualCleanup is set to false, the track will be automatically removed\n   * on source changes.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *                                       removed on a source change\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  }\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(obj) {\n    if (obj === void 0) {\n      obj = {};\n    }\n\n    var _obj = obj,\n        track = _obj.track;\n\n    if (!track) {\n      track = obj;\n    } // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  }\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n  ;\n\n  _proto.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  }\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n  ;\n\n  _proto.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  }\n  /**\n   * The player's language code.\n   *\n   * Changing the language will trigger\n   * [languagechange]{@link Player#event:languagechange}\n   * which Components can use to update control text.\n   * ClickableComponent will update its control text by default on\n   * [languagechange]{@link Player#event:languagechange}.\n   *\n   * @fires Player#languagechange\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n  ;\n\n  _proto.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    if (this.language_ !== String(code).toLowerCase()) {\n      this.language_ = String(code).toLowerCase(); // during first init, it's possible some things won't be evented\n\n      if (isEvented(this)) {\n        /**\n        * fires when the player language change\n        *\n        * @event Player#languagechange\n        * @type {EventTarget~Event}\n        */\n        this.trigger('languagechange');\n      }\n    }\n  }\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n  ;\n\n  _proto.languages = function languages() {\n    return mergeOptions$3(Player.prototype.options_.languages, this.languages_);\n  }\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n  ;\n\n  _proto.toJSON = function toJSON() {\n    var options = mergeOptions$3(this.options_);\n    var tracks = options.tracks;\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // deep merge tracks and null out player so no circular references\n\n      track = mergeOptions$3(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  }\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n  ;\n\n  _proto.createModal = function createModal(content, options) {\n    var _this22 = this;\n\n    options = options || {};\n    options.content = content || '';\n    var modal = new ModalDialog(this, options);\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this22.removeChild(modal);\n    });\n    modal.open();\n    return modal;\n  }\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        } // Only remove a class if there is a current breakpoint.\n\n\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  }\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  }\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n  ;\n\n  _proto.breakpoints = function breakpoints(_breakpoints) {\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints); // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n\n    this.updateCurrentBreakpoint_(); // Clone the breakpoints before returning.\n\n    return assign(this.breakpoints_);\n  }\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n  ;\n\n  _proto.responsive = function responsive(value) {\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_; // Nothing changed.\n\n    if (value === current) {\n      return;\n    } // The value actually changed, set it.\n\n\n    this.responsive_ = value; // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n\n    if (value) {\n      this.on('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_(); // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  }\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n  ;\n\n  _proto.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  }\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n  ;\n\n  _proto.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  }\n  /**\n   * An object that describes a single piece of media.\n   *\n   * Properties that are not part of this type description will be retained; so,\n   * this can be viewed as a generic metadata storage mechanism as well.\n   *\n   * @see      {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}\n   * @typedef  {Object} Player~MediaObject\n   *\n   * @property {string} [album]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {string} [artist]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [artwork]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API. If not specified, will be populated via the `poster`, if\n   *           available.\n   *\n   * @property {string} [poster]\n   *           URL to an image that will display before playback.\n   *\n   * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]\n   *           A single source object, an array of source objects, or a string\n   *           referencing a URL to a media source. It is _highly recommended_\n   *           that an object or array of objects is used here, so that source\n   *           selection algorithms can take the `type` into account.\n   *\n   * @property {string} [title]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [textTracks]\n   *           An array of objects to be used to create text tracks, following\n   *           the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.\n   *           For ease of removal, these will be created as \"remote\" text\n   *           tracks and set to automatically clean up on source changes.\n   *\n   *           These objects may have properties like `src`, `kind`, `label`,\n   *           and `language`, see {@link Tech#createRemoteTextTrack}.\n   */\n\n  /**\n   * Populate the player using a {@link Player~MediaObject|MediaObject}.\n   *\n   * @param  {Player~MediaObject} media\n   *         A media object.\n   *\n   * @param  {Function} ready\n   *         A callback to be called when the player is ready.\n   */\n  ;\n\n  _proto.loadMedia = function loadMedia(media, ready) {\n    var _this23 = this;\n\n    if (!media || typeof media !== 'object') {\n      return;\n    }\n\n    this.reset(); // Clone the media object so it cannot be mutated from outside.\n\n    this.cache_.media = mergeOptions$3(media);\n    var _this$cache_$media = this.cache_.media,\n        artwork = _this$cache_$media.artwork,\n        poster = _this$cache_$media.poster,\n        src = _this$cache_$media.src,\n        textTracks = _this$cache_$media.textTracks; // If `artwork` is not given, create it using `poster`.\n\n    if (!artwork && poster) {\n      this.cache_.media.artwork = [{\n        src: poster,\n        type: getMimetype(poster)\n      }];\n    }\n\n    if (src) {\n      this.src(src);\n    }\n\n    if (poster) {\n      this.poster(poster);\n    }\n\n    if (Array.isArray(textTracks)) {\n      textTracks.forEach(function (tt) {\n        return _this23.addRemoteTextTrack(tt, false);\n      });\n    }\n\n    this.ready(ready);\n  }\n  /**\n   * Get a clone of the current {@link Player~MediaObject} for this player.\n   *\n   * If the `loadMedia` method has not been used, will attempt to return a\n   * {@link Player~MediaObject} based on the current state of the player.\n   *\n   * @return {Player~MediaObject}\n   */\n  ;\n\n  _proto.getMedia = function getMedia() {\n    if (!this.cache_.media) {\n      var poster = this.poster();\n      var src = this.currentSources();\n      var textTracks = Array.prototype.map.call(this.remoteTextTracks(), function (tt) {\n        return {\n          kind: tt.kind,\n          label: tt.label,\n          language: tt.language,\n          src: tt.src\n        };\n      });\n      var media = {\n        src: src,\n        textTracks: textTracks\n      };\n\n      if (poster) {\n        media.poster = poster;\n        media.artwork = [{\n          src: media.poster,\n          type: getMimetype(media.poster)\n        }];\n      }\n\n      return media;\n    }\n\n    return mergeOptions$3(this.cache_.media);\n  }\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n  ;\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    } // Check if data-setup attr exists.\n\n\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log$1.error(err);\n      }\n\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions); // Get tag children settings\n\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i]; // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  }\n  /**\n   * Determine whether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n  ;\n\n  _proto.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i'); // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style || // IE10-specific (2012 flex spec), available for completeness\n    'msFlexOrder' in elem.style);\n  }\n  /**\n   * Set debug mode to enable/disable logs at info level.\n   *\n   * @param {boolean} enabled\n   * @fires Player#debugon\n   * @fires Player#debugoff\n   */\n  ;\n\n  _proto.debug = function debug(enabled) {\n    if (enabled === undefined) {\n      return this.debugEnabled_;\n    }\n\n    if (enabled) {\n      this.trigger('debugon');\n      this.previousLogLevel_ = this.log.level;\n      this.log.level('debug');\n      this.debugEnabled_ = true;\n    } else {\n      this.trigger('debugoff');\n      this.log.level(this.previousLogLevel_);\n      this.previousLogLevel_ = undefined;\n      this.debugEnabled_ = false;\n    }\n  }\n  /**\n   * Set or get current playback rates.\n   * Takes an array and updates the playback rates menu with the new items.\n   * Pass in an empty array to hide the menu.\n   * Values other than arrays are ignored.\n   *\n   * @fires Player#playbackrateschange\n   * @param {number[]} newRates\n   *                   The new rates that the playback rates menu should update to.\n   *                   An empty array will hide the menu\n   * @return {number[]} When used as a getter will return the current playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates(newRates) {\n    if (newRates === undefined) {\n      return this.cache_.playbackRates;\n    } // ignore any value that isn't an array\n\n\n    if (!Array.isArray(newRates)) {\n      return;\n    } // ignore any arrays that don't only contain numbers\n\n\n    if (!newRates.every(function (rate) {\n      return typeof rate === 'number';\n    })) {\n      return;\n    }\n\n    this.cache_.playbackRates = newRates;\n    /**\n    * fires when the playback rates in a player are changed\n    *\n    * @event Player#playbackrateschange\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('playbackrateschange');\n  };\n\n  return Player;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    } // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n\n\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * Get or set the `Player`'s crossorigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n * behavior.\n *\n * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n *\n * @param {string} [value]\n *        The value to set the `Player`'s crossorigin to. If an argument is\n *        given, must be one of `anonymous` or `use-credentials`.\n *\n * @return {string|undefined}\n *         - The current crossorigin value of the `Player` when getting.\n *         - undefined when setting\n */\n\nPlayer.prototype.crossorigin = Player.prototype.crossOrigin;\n/**\n * Global enumeration of players.\n *\n * The keys are the player IDs and the values are either the {@link Player}\n * instance or `null` for disposed players.\n *\n * @type {Object}\n */\n\nPlayer.players = {};\nvar navigator = window$1.navigator;\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\n\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n  html5: {},\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n  liveui: false,\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n  // locales and their language translations\n  languages: {},\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n  normalizeAutoplay: false,\n  fullscreen: {\n    options: {\n      navigationUI: 'hide'\n    }\n  },\n  breakpoints: {},\n  responsive: false,\n  audioOnlyMode: false,\n  audioPosterMode: false\n};\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype[\"handleTech\" + toTitleCase$1(event) + \"_\"] = function () {\n    return this.trigger(event);\n  };\n});\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent$1.registerComponent('Player', Player);\n\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\n\nvar BASE_PLUGIN_NAME = 'plugin';\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\n\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\n\nvar pluginStorage = {};\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {boolean}\n *          Whether or not the plugin has been registered.\n */\n\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {Function|undefined}\n *          The plugin (or undefined).\n */\n\n\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\n\n\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\n\n\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @return {Function}\n *          A wrapper function for the given plugin.\n */\n\n\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: null\n    }, true);\n    var instance = plugin.apply(this, arguments);\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: instance\n    });\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n  return basicPluginWrapper;\n};\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @return {Function}\n */\n\n\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n  return function () {\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: PluginSubClass,\n      instance: null\n    }, true);\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = _construct(PluginSubClass, [this].concat(args)); // The plugin is replaced by a function that returns the current instance.\n\n\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n    return instance;\n  };\n};\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\n\nvar Plugin = /*#__PURE__*/function () {\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player;\n\n    if (!this.log) {\n      this.log = this.player.log.createLogger(this.name);\n    } // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n\n\n    evented(this);\n    delete this.trigger;\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name); // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n\n    this.dispose = this.dispose.bind(this); // If the player is disposed, dispose the plugin.\n\n    player.on('dispose', this.dispose);\n  }\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  var _proto = Plugin.prototype;\n\n  _proto.version = function version() {\n    return this.constructor.VERSION;\n  }\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @return {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n  ;\n\n  _proto.getEventHash = function getEventHash(hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  }\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @return {boolean}\n   *          Whether or not default was prevented.\n   */\n  ;\n\n  _proto.trigger = function trigger$1(event, hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  }\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n  ;\n\n  _proto.handleStateChanged = function handleStateChanged(e) {}\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose); // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null; // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  }\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @return {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n  ;\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  }\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @return {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n  ;\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", must be a string, was \" + typeof name + \".\");\n    }\n\n    if (pluginExists(name)) {\n      log$1.warn(\"A plugin named \\\"\" + name + \"\\\" already exists. You may want to avoid re-registering plugins!\");\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", cannot share a name with an existing player method!\");\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error(\"Illegal plugin for \\\"\" + name + \"\\\", must be a function, was \" + typeof plugin + \".\");\n    }\n\n    pluginStorage[name] = plugin; // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  }\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param  {string} name\n   *         The name of the plugin to be de-registered. Must be a string that\n   *         matches an existing plugin.\n   *\n   * @throws {Error}\n   *         If an attempt is made to de-register the base plugin.\n   */\n  ;\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  }\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @return {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n  ;\n\n  Plugin.getPlugins = function getPlugins(names) {\n    if (names === void 0) {\n      names = Object.keys(pluginStorage);\n    }\n\n    var result;\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n    return result;\n  }\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @return {string}\n   *          The plugin's version or an empty string.\n   */\n  ;\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\n\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\n\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\nvar hasLogged = false;\n/**\n * Used to subclass an existing class by emulating ES subclassing using the\n * `extends` keyword.\n *\n * @function\n * @deprecated\n * @example\n * var MyComponent = videojs.extend(videojs.getComponent('Component'), {\n *   myCustomMethod: function() {\n *     // Do things in my method.\n *   }\n * });\n *\n * @param    {Function} superClass\n *           The class to inherit from\n *\n * @param    {Object}   [subClassMethods={}]\n *           Methods of the new class\n *\n * @return   {Function}\n *           The new class with subClassMethods that inherited superClass.\n */\n\nvar extend = function extend(superClass, subClassMethods) {\n  if (subClassMethods === void 0) {\n    subClassMethods = {};\n  }\n\n  // Log a warning the first time extend is called to note that it is deprecated\n  // It was previously deprecated in our documentation (guides, specifically),\n  // but was never formally deprecated in code.\n  if (!hasLogged) {\n    log$1.warn('videojs.extend is deprecated as of Video.js 7.22.0 and will be removed in Video.js 8.0.0');\n    hasLogged = true;\n  }\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if (typeof subClassMethods === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass); // this is needed for backward-compatibility and node compatibility.\n\n\n  if (superClass) {\n    subClass.super_ = superClass;\n  } // Extend subObj's prototype with functions and other properties from props\n\n\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n\n/**\n * @file video.js\n * @module videojs\n */\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @private\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @return {string}\n *          The string, without any leading `#`.\n */\n\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n/**\n * The `videojs()` function doubles as the main function for users to create a\n * {@link Player} instance as well as the main library namespace.\n *\n * It can also be used as a getter for a pre-existing {@link Player} instance.\n * However, we _strongly_ recommend using `videojs.getPlayer()` for this\n * purpose because it avoids any potential for unintended initialization.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### id\n * string|Element, **required**\n *\n * Video element or video element ID.\n *\n * ##### options\n * Object, optional\n *\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * ##### ready\n * {@link Component~ReadyCallback}, optional\n *\n * A function to be called when the {@link Player} and {@link Tech} are ready.\n *\n * #### Return Value\n *\n * The `videojs()` function returns a {@link Player} instance.\n *\n * @namespace\n *\n * @borrows AudioTrack as AudioTrack\n * @borrows Component.getComponent as getComponent\n * @borrows module:computed-style~computedStyle as computedStyle\n * @borrows module:events.on as on\n * @borrows module:events.one as one\n * @borrows module:events.off as off\n * @borrows module:events.trigger as trigger\n * @borrows EventTarget as EventTarget\n * @borrows module:extend~extend as extend\n * @borrows module:fn.bind as bind\n * @borrows module:format-time.formatTime as formatTime\n * @borrows module:format-time.resetFormatTime as resetFormatTime\n * @borrows module:format-time.setFormatTime as setFormatTime\n * @borrows module:merge-options.mergeOptions as mergeOptions\n * @borrows module:middleware.use as use\n * @borrows Player.players as players\n * @borrows Plugin.registerPlugin as registerPlugin\n * @borrows Plugin.deregisterPlugin as deregisterPlugin\n * @borrows Plugin.getPlugins as getPlugins\n * @borrows Plugin.getPlugin as getPlugin\n * @borrows Plugin.getPluginVersion as getPluginVersion\n * @borrows Tech.getTech as getTech\n * @borrows Tech.registerTech as registerTech\n * @borrows TextTrack as TextTrack\n * @borrows module:time-ranges.createTimeRanges as createTimeRange\n * @borrows module:time-ranges.createTimeRanges as createTimeRanges\n * @borrows module:url.isCrossOrigin as isCrossOrigin\n * @borrows module:url.parseUrl as parseUrl\n * @borrows VideoTrack as VideoTrack\n *\n * @param  {string|Element} id\n *         Video element or video element ID.\n *\n * @param  {Object} [options]\n *         Options object for providing settings.\n *         See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * @param  {Component~ReadyCallback} [ready]\n *         A function to be called when the {@link Player} and {@link Tech} are\n *         ready.\n *\n * @return {Player}\n *         The `videojs()` function returns a {@link Player|Player} instance.\n */\n\n\nfunction videojs(id, options, ready) {\n  var player = videojs.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log$1.warn(\"Player \\\"\" + id + \"\\\" is already initialised. Options will not be applied.\");\n    }\n\n    if (ready) {\n      player.ready(ready);\n    }\n\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  } // document.body.contains(el) will only check if el is contained within that one document.\n  // This causes problems for elements in iframes.\n  // Instead, use the element's ownerDocument instead of the global document.\n  // This will make sure that the element is indeed in the dom of that document.\n  // Additionally, check that the document in question has a default view.\n  // If the document is no longer attached to the dom, the defaultView of the document will be null.\n\n\n  if (!el.ownerDocument.defaultView || !el.ownerDocument.body.contains(el)) {\n    log$1.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {}; // Store a copy of the el before modification, if it is to be restored in destroy()\n  // If div ingest, store the parent div\n\n  if (options.restoreEl === true) {\n    options.restoreEl = (el.parentNode && el.parentNode.hasAttribute('data-vjs-player') ? el.parentNode : el).cloneNode(true);\n  }\n\n  hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions$3(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log$1.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions$3(options, opts);\n  }); // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n\n  var PlayerComponent = Component$1.getComponent('Player');\n  player = new PlayerComponent(el, options, ready);\n  hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n  return player;\n}\n\nvideojs.hooks_ = hooks_;\nvideojs.hooks = hooks;\nvideojs.hook = hook;\nvideojs.hookOnce = hookOnce;\nvideojs.removeHook = removeHook; // Add default styles\n\nif (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n\n    setTextContent(style, \"\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid:not(.vjs-audio-only-mode) {\\n        padding-top: 56.25%\\n      }\\n    \");\n  }\n} // Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\n\n\nautoSetupTimeout(1, videojs);\n/**\n * Current Video.js version. Follows [semantic versioning](https://semver.org/).\n *\n * @type {string}\n */\n\nvideojs.VERSION = version$5;\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\n\nvideojs.options = Player.prototype.options_;\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\n\nvideojs.getPlayers = function () {\n  return Player.players;\n};\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @return {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\n\n\nvideojs.getPlayer = function (id) {\n  var players = Player.players;\n  var tag;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId; // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\n\n\nvideojs.getAllPlayers = function () {\n  return (// Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\nvideojs.players = Player.players;\nvideojs.getComponent = Component$1.getComponent;\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\n\nvideojs.registerComponent = function (name, comp) {\n  if (Tech.isTech(comp)) {\n    log$1.warn(\"The \" + name + \" tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)\");\n  }\n\n  Component$1.registerComponent.call(Component$1, name, comp);\n};\n\nvideojs.getTech = Tech.getTech;\nvideojs.registerTech = Tech.registerTech;\nvideojs.use = use;\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @property {object} middleware.TERMINATOR\n */\n\nObject.defineProperty(videojs, 'middleware', {\n  value: {},\n  writeable: false,\n  enumerable: true\n});\nObject.defineProperty(videojs.middleware, 'TERMINATOR', {\n  value: TERMINATOR,\n  writeable: false,\n  enumerable: true\n});\n/**\n * A reference to the {@link module:browser|browser utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:browser|browser}\n */\n\nvideojs.browser = browser;\n/**\n * Use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED} instead; only\n * included for backward-compatibility with 4.x.\n *\n * @deprecated Since version 5.0, use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED instead.\n * @type {boolean}\n */\n\nvideojs.TOUCH_ENABLED = TOUCH_ENABLED;\nvideojs.extend = extend;\nvideojs.mergeOptions = mergeOptions$3;\nvideojs.bind = bind;\nvideojs.registerPlugin = Plugin.registerPlugin;\nvideojs.deregisterPlugin = Plugin.deregisterPlugin;\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\n\nvideojs.plugin = function (name, plugin) {\n  log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name, plugin);\n};\n\nvideojs.getPlugins = Plugin.getPlugins;\nvideojs.getPlugin = Plugin.getPlugin;\nvideojs.getPluginVersion = Plugin.getPluginVersion;\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\n\nvideojs.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n  videojs.options.languages = mergeOptions$3(videojs.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n  return videojs.options.languages[code];\n};\n/**\n * A reference to the {@link module:log|log utility module} as an object.\n *\n * @type {Function}\n * @see  {@link module:log|log}\n */\n\n\nvideojs.log = log$1;\nvideojs.createLogger = createLogger;\nvideojs.createTimeRange = videojs.createTimeRanges = createTimeRanges;\nvideojs.formatTime = formatTime;\nvideojs.setFormatTime = setFormatTime;\nvideojs.resetFormatTime = resetFormatTime;\nvideojs.parseUrl = parseUrl;\nvideojs.isCrossOrigin = isCrossOrigin;\nvideojs.EventTarget = EventTarget$2;\nvideojs.on = on;\nvideojs.one = one;\nvideojs.off = off;\nvideojs.trigger = trigger;\n/**\n * A cross-browser XMLHttpRequest wrapper.\n *\n * @function\n * @param    {Object} options\n *           Settings for the request.\n *\n * @return   {XMLHttpRequest|XDomainRequest}\n *           The request object.\n *\n * @see      https://github.com/Raynos/xhr\n */\n\nvideojs.xhr = XHR;\nvideojs.TextTrack = TextTrack;\nvideojs.AudioTrack = AudioTrack;\nvideojs.VideoTrack = VideoTrack;\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs[k] = function () {\n    log$1.warn(\"videojs.\" + k + \"() is deprecated; use videojs.dom.\" + k + \"() instead\");\n    return Dom[k].apply(null, arguments);\n  };\n});\nvideojs.computedStyle = computedStyle;\n/**\n * A reference to the {@link module:dom|DOM utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:dom|dom}\n */\n\nvideojs.dom = Dom;\n/**\n * A reference to the {@link module:url|URL utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:url|url}\n */\n\nvideojs.url = Url;\nvideojs.defineLazyProperty = defineLazyProperty; // Adding less ambiguous text for fullscreen button.\n// In a major update this could become the default text and key.\n\nvideojs.addLanguage('en', {\n  'Non-Fullscreen': 'Exit Fullscreen'\n});\n\n/*! @name @videojs/http-streaming @version 2.16.2 @license Apache-2.0 */\n/**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\n\nvar resolveUrl = _resolveUrl;\n/**\n * Checks whether xhr request was redirected and returns correct url depending\n * on `handleManifestRedirects` option\n *\n * @api private\n *\n * @param  {string} url - an url being requested\n * @param  {XMLHttpRequest} req - xhr request result\n *\n * @return {string}\n */\n\nvar resolveManifestRedirect = function resolveManifestRedirect(handleManifestRedirect, url, req) {\n  // To understand how the responseURL below is set and generated:\n  // - https://fetch.spec.whatwg.org/#concept-response-url\n  // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n  if (handleManifestRedirect && req && req.responseURL && url !== req.responseURL) {\n    return req.responseURL;\n  }\n\n  return url;\n};\n\nvar logger = function logger(source) {\n  if (videojs.log.debug) {\n    return videojs.log.debug.bind(videojs, 'VHS:', source + \" >\");\n  }\n\n  return function () {};\n};\n/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\n\nvar TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\n\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return videojs.createTimeRanges(results);\n};\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n *\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object\n */\n\n\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n  });\n};\n/**\n * Returns the TimeRanges that begin later than the specified time.\n *\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object.\n */\n\n\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n/**\n * Returns gaps within a list of TimeRanges\n *\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\n\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return videojs.createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n    ranges.push([start, end]);\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Calculate the intersection of two TimeRanges\n *\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @return {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\n\n\nvar bufferIntersection = function bufferIntersection(bufferA, bufferB) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = [];\n\n  if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n    return videojs.createTimeRange();\n  } // Handle the case where we have both buffers and create an\n  // intersection of the two\n\n\n  var count = bufferA.length; // A) Gather up all start and end times\n\n  while (count--) {\n    extents.push({\n      time: bufferA.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferA.end(count),\n      type: 'end'\n    });\n  }\n\n  count = bufferB.length;\n\n  while (count--) {\n    extents.push({\n      time: bufferB.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferB.end(count),\n      type: 'end'\n    });\n  } // B) Sort them by time\n\n\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  }); // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++; // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--; // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    } // F) Record overlapping ranges\n\n\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @return {string} a human readable string\n */\n\n\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\n\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime, playbackRate) {\n  if (playbackRate === void 0) {\n    playbackRate = 1;\n  }\n\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n/**\n * Converts a TimeRanges object into an array representation\n *\n * @param {TimeRanges} timeRanges\n * @return {Array}\n */\n\n\nvar timeRangesToArray = function timeRangesToArray(timeRanges) {\n  var timeRangesList = [];\n\n  for (var i = 0; i < timeRanges.length; i++) {\n    timeRangesList.push({\n      start: timeRanges.start(i),\n      end: timeRanges.end(i)\n    });\n  }\n\n  return timeRangesList;\n};\n/**\n * Determines if two time range objects are different.\n *\n * @param {TimeRange} a\n *        the first time range object to check\n *\n * @param {TimeRange} b\n *        the second time range object to check\n *\n * @return {Boolean}\n *         Whether the time range objects differ\n */\n\n\nvar isRangeDifferent = function isRangeDifferent(a, b) {\n  // same object\n  if (a === b) {\n    return false;\n  } // one or the other is undefined\n\n\n  if (!a && b || !b && a) {\n    return true;\n  } // length is different\n\n\n  if (a.length !== b.length) {\n    return true;\n  } // see if any start/end pair is different\n\n\n  for (var i = 0; i < a.length; i++) {\n    if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {\n      return true;\n    }\n  } // if the length and every pair is the same\n  // this is the same time range\n\n\n  return false;\n};\n\nvar lastBufferedEnd = function lastBufferedEnd(a) {\n  if (!a || !a.length || !a.end) {\n    return;\n  }\n\n  return a.end(a.length - 1);\n};\n/**\n * A utility function to add up the amount of time in a timeRange\n * after a specified startTime.\n * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0\n *     would return 40 as there are 40s seconds after 0 in the timeRange\n *\n * @param {TimeRange} range\n *        The range to check against\n * @param {number} startTime\n *        The time in the time range that you should start counting from\n *\n * @return {number}\n *          The number of seconds in the buffer passed the specified time.\n */\n\n\nvar timeAheadOf = function timeAheadOf(range, startTime) {\n  var time = 0;\n\n  if (!range || !range.length) {\n    return time;\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    var start = range.start(i);\n    var end = range.end(i); // startTime is after this range entirely\n\n    if (startTime > end) {\n      continue;\n    } // startTime is within this range\n\n\n    if (startTime > start && startTime <= end) {\n      time += end - startTime;\n      continue;\n    } // startTime is before this range.\n\n\n    time += end - start;\n  }\n\n  return time;\n};\n/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n\n\nvar createTimeRange = videojs.createTimeRange;\n/**\n * Get the duration of a segment, with special cases for\n * llhls segments that do not have a duration yet.\n *\n * @param {Object} playlist\n *        the playlist that the segment belongs to.\n * @param {Object} segment\n *        the segment to get a duration for.\n *\n * @return {number}\n *          the segment duration\n */\n\nvar segmentDurationWithParts = function segmentDurationWithParts(playlist, segment) {\n  // if this isn't a preload segment\n  // then we will have a segment duration that is accurate.\n  if (!segment.preload) {\n    return segment.duration;\n  } // otherwise we have to add up parts and preload hints\n  // to get an up to date duration.\n\n\n  var result = 0;\n  (segment.parts || []).forEach(function (p) {\n    result += p.duration;\n  }); // for preload hints we have to use partTargetDuration\n  // as they won't even have a duration yet.\n\n  (segment.preloadHints || []).forEach(function (p) {\n    if (p.type === 'PART') {\n      result += playlist.partTargetDuration;\n    }\n  });\n  return result;\n};\n/**\n * A function to get a combined list of parts and segments with durations\n * and indexes.\n *\n * @param {Playlist} playlist the playlist to get the list for.\n *\n * @return {Array} The part/segment list.\n */\n\n\nvar getPartsAndSegments = function getPartsAndSegments(playlist) {\n  return (playlist.segments || []).reduce(function (acc, segment, si) {\n    if (segment.parts) {\n      segment.parts.forEach(function (part, pi) {\n        acc.push({\n          duration: part.duration,\n          segmentIndex: si,\n          partIndex: pi,\n          part: part,\n          segment: segment\n        });\n      });\n    } else {\n      acc.push({\n        duration: segment.duration,\n        segmentIndex: si,\n        partIndex: null,\n        segment: segment,\n        part: null\n      });\n    }\n\n    return acc;\n  }, []);\n};\n\nvar getLastParts = function getLastParts(media) {\n  var lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];\n  return lastSegment && lastSegment.parts || [];\n};\n\nvar getKnownPartCount = function getKnownPartCount(_ref) {\n  var preloadSegment = _ref.preloadSegment;\n\n  if (!preloadSegment) {\n    return;\n  }\n\n  var parts = preloadSegment.parts,\n      preloadHints = preloadSegment.preloadHints;\n  var partCount = (preloadHints || []).reduce(function (count, hint) {\n    return count + (hint.type === 'PART' ? 1 : 0);\n  }, 0);\n  partCount += parts && parts.length ? parts.length : 0;\n  return partCount;\n};\n/**\n * Get the number of seconds to delay from the end of a\n * live playlist.\n *\n * @param {Playlist} master the master playlist\n * @param {Playlist} media the media playlist\n * @return {number} the hold back in seconds.\n */\n\n\nvar liveEdgeDelay = function liveEdgeDelay(master, media) {\n  if (media.endList) {\n    return 0;\n  } // dash suggestedPresentationDelay trumps everything\n\n\n  if (master && master.suggestedPresentationDelay) {\n    return master.suggestedPresentationDelay;\n  }\n\n  var hasParts = getLastParts(media).length > 0; // look for \"part\" delays from ll-hls first\n\n  if (hasParts && media.serverControl && media.serverControl.partHoldBack) {\n    return media.serverControl.partHoldBack;\n  } else if (hasParts && media.partTargetDuration) {\n    return media.partTargetDuration * 3; // finally look for full segment delays\n  } else if (media.serverControl && media.serverControl.holdBack) {\n    return media.serverControl.holdBack;\n  } else if (media.targetDuration) {\n    return media.targetDuration * 3;\n  }\n\n  return 0;\n};\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n  // the interval, use it\n\n  var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start,\n        precise: true\n      };\n    }\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n\n  while (i--) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: result + segment.end,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: result + segment.start,\n        precise: true\n      };\n    }\n  }\n\n  return {\n    result: result,\n    precise: false\n  };\n};\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment;\n  var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  } // indicate we didn't find a useful duration estimate\n\n\n  return {\n    result: -1,\n    precise: false\n  };\n};\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {number} the duration between the first available segment\n  * and end index.\n  */\n\n\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  } // do a backward walk to estimate the duration\n\n\n  var backward = backwardDuration(playlist, endSequence);\n\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  } // walk forward to see if a precise duration estimate can be made\n  // that way\n\n\n  var forward = forwardDuration(playlist, endSequence);\n\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  } // return the less-precise, playlist-based duration estimate\n\n\n  return backward.result + expired;\n};\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {number} the duration between the start index and end\n  * index.\n  */\n\n\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  } // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n\n\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    } // duration should be Infinity for live playlists\n\n\n    if (!playlist.endList) {\n      return window$1.Infinity;\n    }\n  } // calculate the total duration based on the segment durations\n\n\n  return intervalDuration(playlist, endSequence, expired);\n};\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Array} options.durationList list to iterate over for durations.\n  * @param {number} options.defaultDuration duration to use for elements before or after the durationList\n  * @param {number} options.startIndex partsAndSegments index to start\n  * @param {number} options.endIndex partsAndSegments index to end.\n  * @return {number} the number of seconds between startIndex and endIndex\n  */\n\n\nvar sumDurations = function sumDurations(_ref2) {\n  var defaultDuration = _ref2.defaultDuration,\n      durationList = _ref2.durationList,\n      startIndex = _ref2.startIndex,\n      endIndex = _ref2.endIndex;\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref3 = [endIndex, startIndex];\n    startIndex = _ref3[0];\n    endIndex = _ref3[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += defaultDuration;\n    }\n\n    startIndex = 0;\n  }\n\n  for (var _i = startIndex; _i < endIndex; _i++) {\n    durations += durationList[_i].duration;\n  }\n\n  return durations;\n};\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n *                        This takes into account the value of liveEdgePadding.\n *                        Setting liveEdgePadding to 0 is equivalent to setting this to false.\n * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.\n *                 If this is provided, it is used in the safe live end calculation.\n *                 Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.\n *                 Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {number} the end time of playlist\n * @function playlistEnd\n */\n\n\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n  var lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);\n\n  if (useSafeLiveEnd) {\n    liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);\n    lastSegmentEndTime -= liveEdgePadding;\n  } // don't return a time less than zero\n\n\n  return Math.max(0, lastSegmentEndTime);\n};\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.\n  *        Corresponds to suggestedPresentationDelay in DASH manifests.\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\n\n\nvar seekable = function seekable(playlist, expired, liveEdgePadding) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);\n\n  if (seekableEnd === null) {\n    return createTimeRange();\n  }\n\n  return createTimeRange(seekableStart, seekableEnd);\n};\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} options.playlist the media playlist to query\n * @param {number} options.currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {number} options.startTime the time when the segment/part starts\n * @param {number} options.startingSegmentIndex the segment index to start looking at.\n * @param {number?} [options.startingPartIndex] the part index to look at within the segment.\n *\n * @return {Object} an object with partIndex, segmentIndex, and startTime.\n */\n\n\nvar getMediaInfoForTime = function getMediaInfoForTime(_ref4) {\n  var playlist = _ref4.playlist,\n      currentTime = _ref4.currentTime,\n      startingSegmentIndex = _ref4.startingSegmentIndex,\n      startingPartIndex = _ref4.startingPartIndex,\n      startTime = _ref4.startTime,\n      experimentalExactManifestTimings = _ref4.experimentalExactManifestTimings;\n  var time = currentTime - startTime;\n  var partsAndSegments = getPartsAndSegments(playlist);\n  var startIndex = 0;\n\n  for (var i = 0; i < partsAndSegments.length; i++) {\n    var partAndSegment = partsAndSegments[i];\n\n    if (startingSegmentIndex !== partAndSegment.segmentIndex) {\n      continue;\n    } // skip this if part index does not match.\n\n\n    if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {\n      continue;\n    }\n\n    startIndex = i;\n    break;\n  }\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (var _i2 = startIndex - 1; _i2 >= 0; _i2--) {\n        var _partAndSegment = partsAndSegments[_i2];\n        time += _partAndSegment.duration;\n\n        if (experimentalExactManifestTimings) {\n          if (time < 0) {\n            continue;\n          }\n        } else if (time + TIME_FUDGE_FACTOR <= 0) {\n          continue;\n        }\n\n        return {\n          partIndex: _partAndSegment.partIndex,\n          segmentIndex: _partAndSegment.segmentIndex,\n          startTime: startTime - sumDurations({\n            defaultDuration: playlist.targetDuration,\n            durationList: partsAndSegments,\n            startIndex: startIndex,\n            endIndex: _i2\n          })\n        };\n      }\n    } // We were unable to find a good segment within the playlist\n    // so select the first segment\n\n\n    return {\n      partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n      segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n      startTime: currentTime\n    };\n  } // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n\n\n  if (startIndex < 0) {\n    for (var _i3 = startIndex; _i3 < 0; _i3++) {\n      time -= playlist.targetDuration;\n\n      if (time < 0) {\n        return {\n          partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n          segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n          startTime: currentTime\n        };\n      }\n    }\n\n    startIndex = 0;\n  } // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n\n\n  for (var _i4 = startIndex; _i4 < partsAndSegments.length; _i4++) {\n    var _partAndSegment2 = partsAndSegments[_i4];\n    time -= _partAndSegment2.duration;\n\n    if (experimentalExactManifestTimings) {\n      if (time > 0) {\n        continue;\n      }\n    } else if (time - TIME_FUDGE_FACTOR >= 0) {\n      continue;\n    }\n\n    return {\n      partIndex: _partAndSegment2.partIndex,\n      segmentIndex: _partAndSegment2.segmentIndex,\n      startTime: startTime + sumDurations({\n        defaultDuration: playlist.targetDuration,\n        durationList: partsAndSegments,\n        startIndex: startIndex,\n        endIndex: _i4\n      })\n    };\n  } // We are out of possible candidates so load the last one...\n\n\n  return {\n    segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,\n    partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,\n    startTime: currentTime\n  };\n};\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\n\n\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\n\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\n\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n  return !playlist.disabled && !blacklisted;\n};\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\n\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {boolean} true if it's an AES encrypted HLS stream\n */\n\n\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {string} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\n\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {number} segmentDuration\n *        Duration of requested segment\n * @param {number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\n\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist, bytesReceived) {\n  if (bytesReceived === void 0) {\n    bytesReceived = 0;\n  }\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n  return (size - bytesReceived * 8) / bandwidth;\n};\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\n\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n};\n\nvar playlistMatch = function playlistMatch(a, b) {\n  // both playlits are null\n  // or only one playlist is non-null\n  // no match\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // playlist objects are the same, match\n\n\n  if (a === b) {\n    return true;\n  } // first try to use id as it should be the most\n  // accurate\n\n\n  if (a.id && b.id && a.id === b.id) {\n    return true;\n  } // next try to use reslovedUri as it should be the\n  // second most accurate.\n\n\n  if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {\n    return true;\n  } // finally try to use uri as it should be accurate\n  // but might miss a few cases for relative uris\n\n\n  if (a.uri && b.uri && a.uri === b.uri) {\n    return true;\n  }\n\n  return false;\n};\n\nvar someAudioVariant = function someAudioVariant(master, callback) {\n  var AUDIO = master && master.mediaGroups && master.mediaGroups.AUDIO || {};\n  var found = false;\n\n  for (var groupName in AUDIO) {\n    for (var label in AUDIO[groupName]) {\n      found = callback(AUDIO[groupName][label]);\n\n      if (found) {\n        break;\n      }\n    }\n\n    if (found) {\n      break;\n    }\n  }\n\n  return !!found;\n};\n\nvar isAudioOnly = function isAudioOnly(master) {\n  // we are audio only if we have no main playlists but do\n  // have media group playlists.\n  if (!master || !master.playlists || !master.playlists.length) {\n    // without audio variants or playlists this\n    // is not an audio only master.\n    var found = someAudioVariant(master, function (variant) {\n      return variant.playlists && variant.playlists.length || variant.uri;\n    });\n    return found;\n  } // if every playlist has only an audio codec it is audio only\n\n\n  var _loop = function _loop(i) {\n    var playlist = master.playlists[i];\n    var CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.\n\n    if (CODECS && CODECS.split(',').every(function (c) {\n      return isAudioCodec(c);\n    })) {\n      return \"continue\";\n    } // playlist is in an audio group it is audio only\n\n\n    var found = someAudioVariant(master, function (variant) {\n      return playlistMatch(playlist, variant);\n    });\n\n    if (found) {\n      return \"continue\";\n    } // if we make it here this playlist isn't audio and we\n    // are not audio only\n\n\n    return {\n      v: false\n    };\n  };\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    var _ret = _loop(i);\n\n    if (_ret === \"continue\") continue;\n    if (typeof _ret === \"object\") return _ret.v;\n  } // if we make it past every playlist without returning, then\n  // this is an audio only playlist.\n\n\n  return true;\n}; // exports\n\n\nvar Playlist = {\n  liveEdgeDelay: liveEdgeDelay,\n  duration: duration,\n  seekable: seekable,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition,\n  isAudioOnly: isAudioOnly,\n  playlistMatch: playlistMatch,\n  segmentDurationWithParts: segmentDurationWithParts\n};\nvar log = videojs.log;\n\nvar createPlaylistID = function createPlaylistID(index, uri) {\n  return index + \"-\" + uri;\n}; // default function for creating a group id\n\n\nvar groupID = function groupID(type, group, label) {\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + label;\n};\n/**\n * Parses a given m3u8 playlist\n *\n * @param {Function} [onwarn]\n *        a function to call when the parser triggers a warning event.\n * @param {Function} [oninfo]\n *        a function to call when the parser triggers an info event.\n * @param {string} manifestString\n *        The downloaded manifest string\n * @param {Object[]} [customTagParsers]\n *        An array of custom tag parsers for the m3u8-parser instance\n * @param {Object[]} [customTagMappers]\n *        An array of custom tag mappers for the m3u8-parser instance\n * @param {boolean} [experimentalLLHLS=false]\n *        Whether to keep ll-hls features in the manifest after parsing.\n * @return {Object}\n *         The manifest object\n */\n\n\nvar parseManifest = function parseManifest(_ref) {\n  var onwarn = _ref.onwarn,\n      oninfo = _ref.oninfo,\n      manifestString = _ref.manifestString,\n      _ref$customTagParsers = _ref.customTagParsers,\n      customTagParsers = _ref$customTagParsers === void 0 ? [] : _ref$customTagParsers,\n      _ref$customTagMappers = _ref.customTagMappers,\n      customTagMappers = _ref$customTagMappers === void 0 ? [] : _ref$customTagMappers,\n      experimentalLLHLS = _ref.experimentalLLHLS;\n  var parser = new Parser();\n\n  if (onwarn) {\n    parser.on('warn', onwarn);\n  }\n\n  if (oninfo) {\n    parser.on('info', oninfo);\n  }\n\n  customTagParsers.forEach(function (customParser) {\n    return parser.addParser(customParser);\n  });\n  customTagMappers.forEach(function (mapper) {\n    return parser.addTagMapper(mapper);\n  });\n  parser.push(manifestString);\n  parser.end();\n  var manifest = parser.manifest; // remove llhls features from the parsed manifest\n  // if we don't want llhls support.\n\n  if (!experimentalLLHLS) {\n    ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {\n      if (manifest.hasOwnProperty(k)) {\n        delete manifest[k];\n      }\n    });\n\n    if (manifest.segments) {\n      manifest.segments.forEach(function (segment) {\n        ['parts', 'preloadHints'].forEach(function (k) {\n          if (segment.hasOwnProperty(k)) {\n            delete segment[k];\n          }\n        });\n      });\n    }\n  }\n\n  if (!manifest.targetDuration) {\n    var targetDuration = 10;\n\n    if (manifest.segments && manifest.segments.length) {\n      targetDuration = manifest.segments.reduce(function (acc, s) {\n        return Math.max(acc, s.duration);\n      }, 0);\n    }\n\n    if (onwarn) {\n      onwarn(\"manifest has no targetDuration defaulting to \" + targetDuration);\n    }\n\n    manifest.targetDuration = targetDuration;\n  }\n\n  var parts = getLastParts(manifest);\n\n  if (parts.length && !manifest.partTargetDuration) {\n    var partTargetDuration = parts.reduce(function (acc, p) {\n      return Math.max(acc, p.duration);\n    }, 0);\n\n    if (onwarn) {\n      onwarn(\"manifest has no partTargetDuration defaulting to \" + partTargetDuration);\n      log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');\n    }\n\n    manifest.partTargetDuration = partTargetDuration;\n  }\n\n  return manifest;\n};\n/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {Function} callback\n *        Callback to call for each media group\n */\n\n\nvar forEachMediaGroup = function forEachMediaGroup(master, callback) {\n  if (!master.mediaGroups) {\n    return;\n  }\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    if (!master.mediaGroups[mediaType]) {\n      return;\n    }\n\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};\n/**\n * Adds properties and attributes to the playlist to keep consistent functionality for\n * playlists throughout VHS.\n *\n * @param {Object} config\n *        Arguments object\n * @param {Object} config.playlist\n *        The media playlist\n * @param {string} [config.uri]\n *        The uri to the media playlist (if media playlist is not from within a master\n *        playlist)\n * @param {string} id\n *        ID to use for the playlist\n */\n\n\nvar setupMediaPlaylist = function setupMediaPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      uri = _ref2.uri,\n      id = _ref2.id;\n  playlist.id = id;\n  playlist.playlistErrors_ = 0;\n\n  if (uri) {\n    // For media playlists, m3u8-parser does not have access to a URI, as HLS media\n    // playlists do not contain their own source URI, but one is needed for consistency in\n    // VHS.\n    playlist.uri = uri;\n  } // For HLS master playlists, even though certain attributes MUST be defined, the\n  // stream may still be played without them.\n  // For HLS media playlists, m3u8-parser does not attach an attributes object to the\n  // manifest.\n  //\n  // To avoid undefined reference errors through the project, and make the code easier\n  // to write/read, add an empty attributes object for these cases.\n\n\n  playlist.attributes = playlist.attributes || {};\n};\n/**\n * Adds ID, resolvedUri, and attributes properties to each playlist of the master, where\n * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to\n * playlist references to the playlists array.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n    setupMediaPlaylist({\n      playlist: playlist,\n      id: createPlaylistID(i, playlist.uri)\n    });\n    playlist.resolvedUri = resolveUrl(master.uri, playlist.uri);\n    master.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility\n\n    master.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,\n    // the stream can be played without it. Although an attributes property may have been\n    // added to the playlist to prevent undefined references, issue a warning to fix the\n    // manifest.\n\n    if (!playlist.attributes.BANDWIDTH) {\n      log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n/**\n * Adds resolvedUri properties to each media group.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  forEachMediaGroup(master, function (properties) {\n    if (properties.uri) {\n      properties.resolvedUri = resolveUrl(master.uri, properties.uri);\n    }\n  });\n};\n/**\n * Creates a master playlist wrapper to insert a sole media playlist into.\n *\n * @param {Object} media\n *        Media playlist\n * @param {string} uri\n *        The media URI\n *\n * @return {Object}\n *         Master playlist\n */\n\n\nvar masterForMedia = function masterForMedia(media, uri) {\n  var id = createPlaylistID(0, uri);\n  var master = {\n    mediaGroups: {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    },\n    uri: window$1.location.href,\n    resolvedUri: window$1.location.href,\n    playlists: [{\n      uri: uri,\n      id: id,\n      resolvedUri: uri,\n      // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n      attributes: {}\n    }]\n  }; // set up ID reference\n\n  master.playlists[id] = master.playlists[0]; // URI reference added for backwards compatibility\n\n  master.playlists[uri] = master.playlists[0];\n  return master;\n};\n/**\n * Does an in-place update of the master manifest to add updated playlist URI references\n * as well as other properties needed by VHS that aren't included by the parser.\n *\n * @param {Object} master\n *        Master manifest object\n * @param {string} uri\n *        The source URI\n * @param {function} createGroupID\n *        A function to determine how to create the groupID for mediaGroups\n */\n\n\nvar addPropertiesToMaster = function addPropertiesToMaster(master, uri, createGroupID) {\n  if (createGroupID === void 0) {\n    createGroupID = groupID;\n  }\n\n  master.uri = uri;\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    if (!master.playlists[i].uri) {\n      // Set up phony URIs for the playlists since playlists are referenced by their URIs\n      // throughout VHS, but some formats (e.g., DASH) don't have external URIs\n      // TODO: consider adding dummy URIs in mpd-parser\n      var phonyUri = \"placeholder-uri-\" + i;\n      master.playlists[i].uri = phonyUri;\n    }\n  }\n\n  var audioOnlyMaster = isAudioOnly(master);\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    // add a playlist array under properties\n    if (!properties.playlists || !properties.playlists.length) {\n      // If the manifest is audio only and this media group does not have a uri, check\n      // if the media group is located in the main list of playlists. If it is, don't add\n      // placeholder properties as it shouldn't be considered an alternate audio track.\n      if (audioOnlyMaster && mediaType === 'AUDIO' && !properties.uri) {\n        for (var _i = 0; _i < master.playlists.length; _i++) {\n          var p = master.playlists[_i];\n\n          if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {\n            return;\n          }\n        }\n      }\n\n      properties.playlists = [_extends({}, properties)];\n    }\n\n    properties.playlists.forEach(function (p, i) {\n      var groupId = createGroupID(mediaType, groupKey, labelKey, p);\n      var id = createPlaylistID(i, groupId);\n\n      if (p.uri) {\n        p.resolvedUri = p.resolvedUri || resolveUrl(master.uri, p.uri);\n      } else {\n        // DEPRECATED, this has been added to prevent a breaking change.\n        // previously we only ever had a single media group playlist, so\n        // we mark the first playlist uri without prepending the index as we used to\n        // ideally we would do all of the playlists the same way.\n        p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use\n        // the placeholder again\n\n        p.resolvedUri = p.uri;\n      }\n\n      p.id = p.id || id; // add an empty attributes object, all playlists are\n      // expected to have this.\n\n      p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)\n\n      master.playlists[p.id] = p;\n      master.playlists[p.uri] = p;\n    });\n  });\n  setupMediaPlaylists(master);\n  resolveMediaGroupUris(master);\n};\n\nvar mergeOptions$2 = videojs.mergeOptions,\n    EventTarget$1 = videojs.EventTarget;\n\nvar addLLHLSQueryDirectives = function addLLHLSQueryDirectives(uri, media) {\n  if (media.endList || !media.serverControl) {\n    return uri;\n  }\n\n  var parameters = {};\n\n  if (media.serverControl.canBlockReload) {\n    var preloadSegment = media.preloadSegment; // next msn is a zero based value, length is not.\n\n    var nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely\n    // that we are going to request a part of that preload segment.\n    // the logic below is used to determine that.\n\n    if (preloadSegment) {\n      var parts = preloadSegment.parts || []; // _HLS_part is a zero based index\n\n      var nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the\n      // length of parts, then we know we had part preload hints\n      // and we need to add the _HLS_part= query\n\n      if (nextPart > -1 && nextPart !== parts.length - 1) {\n        // add existing parts to our preload hints\n        // eslint-disable-next-line\n        parameters._HLS_part = nextPart;\n      } // this if statement makes sure that we request the msn\n      // of the preload segment if:\n      // 1. the preload segment had parts (and was not yet a full segment)\n      //    but was added to our segments array\n      // 2. the preload segment had preload hints for parts that are not in\n      //    the manifest yet.\n      // in all other cases we want the segment after the preload segment\n      // which will be given by using media.segments.length because it is 1 based\n      // rather than 0 based.\n\n\n      if (nextPart > -1 || parts.length) {\n        nextMSN--;\n      }\n    } // add _HLS_msn= in front of any _HLS_part query\n    // eslint-disable-next-line\n\n\n    parameters._HLS_msn = nextMSN;\n  }\n\n  if (media.serverControl && media.serverControl.canSkipUntil) {\n    // add _HLS_skip= infront of all other queries.\n    // eslint-disable-next-line\n    parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';\n  }\n\n  if (Object.keys(parameters).length) {\n    var parsedUri = new window$1.URL(uri);\n    ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {\n      if (!parameters.hasOwnProperty(name)) {\n        return;\n      }\n\n      parsedUri.searchParams.set(name, parameters[name]);\n    });\n    uri = parsedUri.toString();\n  }\n\n  return uri;\n};\n/**\n * Returns a new segment object with properties and\n * the parts array merged.\n *\n * @param {Object} a the old segment\n * @param {Object} b the new segment\n *\n * @return {Object} the merged segment\n */\n\n\nvar updateSegment = function updateSegment(a, b) {\n  if (!a) {\n    return b;\n  }\n\n  var result = mergeOptions$2(a, b); // if only the old segment has preload hints\n  // and the new one does not, remove preload hints.\n\n  if (a.preloadHints && !b.preloadHints) {\n    delete result.preloadHints;\n  } // if only the old segment has parts\n  // then the parts are no longer valid\n\n\n  if (a.parts && !b.parts) {\n    delete result.parts; // if both segments have parts\n    // copy part propeties from the old segment\n    // to the new one.\n  } else if (a.parts && b.parts) {\n    for (var i = 0; i < b.parts.length; i++) {\n      if (a.parts && a.parts[i]) {\n        result.parts[i] = mergeOptions$2(a.parts[i], b.parts[i]);\n      }\n    }\n  } // set skipped to false for segments that have\n  // have had information merged from the old segment.\n\n\n  if (!a.skipped && b.skipped) {\n    result.skipped = false;\n  } // set preload to false for segments that have\n  // had information added in the new segment.\n\n\n  if (a.preload && !b.preload) {\n    result.preload = false;\n  }\n\n  return result;\n};\n/**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be ovewritten.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return {Array} a list of merged segment objects\n */\n\n\nvar updateSegments = function updateSegments(original, update, offset) {\n  var oldSegments = original.slice();\n  var newSegments = update.slice();\n  offset = offset || 0;\n  var result = [];\n  var currentMap;\n\n  for (var newIndex = 0; newIndex < newSegments.length; newIndex++) {\n    var oldSegment = oldSegments[newIndex + offset];\n    var newSegment = newSegments[newIndex];\n\n    if (oldSegment) {\n      currentMap = oldSegment.map || currentMap;\n      result.push(updateSegment(oldSegment, newSegment));\n    } else {\n      // carry over map to new segment if it is missing\n      if (currentMap && !newSegment.map) {\n        newSegment.map = currentMap;\n      }\n\n      result.push(newSegment);\n    }\n  }\n\n  return result;\n};\n\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  // preloadSegment will not have a uri at all\n  // as the segment isn't actually in the manifest yet, only parts\n  if (!segment.resolvedUri && segment.uri) {\n    segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n  }\n\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n  }\n\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n  }\n\n  if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {\n    segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);\n  }\n\n  if (segment.parts && segment.parts.length) {\n    segment.parts.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n\n  if (segment.preloadHints && segment.preloadHints.length) {\n    segment.preloadHints.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n};\n\nvar getAllSegments = function getAllSegments(media) {\n  var segments = media.segments || [];\n  var preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently\n  // a usable segment, only include a preloadSegment that has\n  // parts.\n\n  if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {\n    // if preloadHints has a MAP that means that the\n    // init segment is going to change. We cannot use any of the parts\n    // from this preload segment.\n    if (preloadSegment.preloadHints) {\n      for (var i = 0; i < preloadSegment.preloadHints.length; i++) {\n        if (preloadSegment.preloadHints[i].type === 'MAP') {\n          return segments;\n        }\n      }\n    } // set the duration for our preload segment to target duration.\n\n\n    preloadSegment.duration = media.targetDuration;\n    preloadSegment.preload = true;\n    segments.push(preloadSegment);\n  }\n\n  return segments;\n}; // consider the playlist unchanged if the playlist object is the same or\n// the number of segments is equal, the media sequence number is unchanged,\n// and this playlist hasn't become the end of the playlist\n\n\nvar isPlaylistUnchanged = function isPlaylistUnchanged(a, b) {\n  return a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;\n};\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\n\n\nvar updateMaster$1 = function updateMaster(master, newMedia, unchangedCheck) {\n  if (unchangedCheck === void 0) {\n    unchangedCheck = isPlaylistUnchanged;\n  }\n\n  var result = mergeOptions$2(master, {});\n  var oldMedia = result.playlists[newMedia.id];\n\n  if (!oldMedia) {\n    return null;\n  }\n\n  if (unchangedCheck(oldMedia, newMedia)) {\n    return null;\n  }\n\n  newMedia.segments = getAllSegments(newMedia);\n  var mergedPlaylist = mergeOptions$2(oldMedia, newMedia); // always use the new media's preload segment\n\n  if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {\n    delete mergedPlaylist.preloadSegment;\n  } // if the update could overlap existing segment information, merge the two segment lists\n\n\n  if (oldMedia.segments) {\n    if (newMedia.skip) {\n      newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge\n      // old properties into the new segments\n\n      for (var i = 0; i < newMedia.skip.skippedSegments; i++) {\n        newMedia.segments.unshift({\n          skipped: true\n        });\n      }\n    }\n\n    mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);\n  } // resolve any segment URIs to prevent us from having to do it later\n\n\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  }); // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n\n  for (var _i = 0; _i < result.playlists.length; _i++) {\n    if (result.playlists[_i].id === newMedia.id) {\n      result.playlists[_i] = mergedPlaylist;\n    }\n  }\n\n  result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility\n\n  result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.\n\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (!properties.playlists) {\n      return;\n    }\n\n    for (var _i2 = 0; _i2 < properties.playlists.length; _i2++) {\n      if (newMedia.id === properties.playlists[_i2].id) {\n        properties.playlists[_i2] = mergedPlaylist;\n      }\n    }\n  });\n  return result;\n};\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {number}\n *         The time in ms to wait before refreshing the live playlist\n */\n\n\nvar refreshDelay = function refreshDelay(media, update) {\n  var segments = media.segments || [];\n  var lastSegment = segments[segments.length - 1];\n  var lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];\n  var lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;\n\n  if (update && lastDuration) {\n    return lastDuration * 1000;\n  } // if the playlist is unchanged since the last reload or last segment duration\n  // cannot be determined, try again after half the target duration\n\n\n  return (media.partTargetDuration || media.targetDuration || 10) * 500;\n};\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {string|Object} src url or object of manifest\n * @param {boolean} withCredentials the withCredentials xhr option\n * @class\n */\n\n\nvar PlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(src, vhs, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or object is required');\n    }\n\n    _this.logger_ = logger('PlaylistLoader');\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.src = src;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n    var vhsOptions = vhs.options_;\n    _this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];\n    _this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];\n    _this.experimentalLLHLS = vhsOptions && vhsOptions.experimentalLLHLS || false; // force experimentalLLHLS for IE 11\n\n    if (videojs.browser.IE_VERSION) {\n      _this.experimentalLLHLS = false;\n    } // initialize the loader state\n\n\n    _this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n    _this.handleMediaupdatetimeout_ = _this.handleMediaupdatetimeout_.bind(_assertThisInitialized(_this));\n\n    _this.on('mediaupdatetimeout', _this.handleMediaupdatetimeout_);\n\n    return _this;\n  }\n\n  var _proto = PlaylistLoader.prototype;\n\n  _proto.handleMediaupdatetimeout_ = function handleMediaupdatetimeout_() {\n    var _this2 = this;\n\n    if (this.state !== 'HAVE_METADATA') {\n      // only refresh the media playlist if no other activity is going on\n      return;\n    }\n\n    var media = this.media();\n    var uri = resolveUrl(this.master.uri, media.uri);\n\n    if (this.experimentalLLHLS) {\n      uri = addLLHLSQueryDirectives(uri, media);\n    }\n\n    this.state = 'HAVE_CURRENT_METADATA';\n    this.request = this.vhs_.xhr({\n      uri: uri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this2.request) {\n        return;\n      }\n\n      if (error) {\n        return _this2.playlistRequestError(_this2.request, _this2.media(), 'HAVE_METADATA');\n      }\n\n      _this2.haveMetadata({\n        playlistString: _this2.request.responseText,\n        url: _this2.media().uri,\n        id: _this2.media().id\n      });\n    });\n  };\n\n  _proto.playlistRequestError = function playlistRequestError(xhr, playlist, startingState) {\n    var uri = playlist.uri,\n        id = playlist.id; // any in-flight request is now finished\n\n    this.request = null;\n\n    if (startingState) {\n      this.state = startingState;\n    }\n\n    this.error = {\n      playlist: this.master.playlists[id],\n      status: xhr.status,\n      message: \"HLS playlist request error at URL: \" + uri + \".\",\n      responseText: xhr.responseText,\n      code: xhr.status >= 500 ? 4 : 2\n    };\n    this.trigger('error');\n  };\n\n  _proto.parseManifest_ = function parseManifest_(_ref) {\n    var _this3 = this;\n\n    var url = _ref.url,\n        manifestString = _ref.manifestString;\n    return parseManifest({\n      onwarn: function onwarn(_ref2) {\n        var message = _ref2.message;\n        return _this3.logger_(\"m3u8-parser warn for \" + url + \": \" + message);\n      },\n      oninfo: function oninfo(_ref3) {\n        var message = _ref3.message;\n        return _this3.logger_(\"m3u8-parser info for \" + url + \": \" + message);\n      },\n      manifestString: manifestString,\n      customTagParsers: this.customTagParsers,\n      customTagMappers: this.customTagMappers,\n      experimentalLLHLS: this.experimentalLLHLS\n    });\n  }\n  /**\n   * Update the playlist loader's state in response to a new or updated playlist.\n   *\n   * @param {string} [playlistString]\n   *        Playlist string (if playlistObject is not provided)\n   * @param {Object} [playlistObject]\n   *        Playlist object (if playlistString is not provided)\n   * @param {string} url\n   *        URL of playlist\n   * @param {string} id\n   *        ID to use for playlist\n   */\n  ;\n\n  _proto.haveMetadata = function haveMetadata(_ref4) {\n    var playlistString = _ref4.playlistString,\n        playlistObject = _ref4.playlistObject,\n        url = _ref4.url,\n        id = _ref4.id; // any in-flight request is now finished\n\n    this.request = null;\n    this.state = 'HAVE_METADATA';\n    var playlist = playlistObject || this.parseManifest_({\n      url: url,\n      manifestString: playlistString\n    });\n    playlist.lastRequest = Date.now();\n    setupMediaPlaylist({\n      playlist: playlist,\n      uri: url,\n      id: id\n    }); // merge this playlist into the master\n\n    var update = updateMaster$1(this.master, playlist);\n    this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;\n    this.pendingMedia_ = null;\n\n    if (update) {\n      this.master = update;\n      this.media_ = this.master.playlists[id];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));\n    this.trigger('loadedplaylist');\n  }\n  /**\n    * Abort any outstanding work and clean up.\n    */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    window$1.clearTimeout(this.finalRenditionTimeout);\n    this.off();\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  }\n  /**\n    * When called without any arguments, returns the currently\n    * active media playlist. When called with a single argument,\n    * triggers the playlist loader to asynchronously switch to the\n    * specified media playlist. Calling this method while the\n    * loader is in the HAVE_NOTHING causes an error to be emitted\n    * but otherwise has no effect.\n    *\n    * @param {Object=} playlist the parsed media playlist\n    * object to switch to\n    * @param {boolean=} shouldDelay whether we should delay the request by half target duration\n    *\n    * @return {Playlist} the current loaded media\n    */\n  ;\n\n  _proto.media = function media(playlist, shouldDelay) {\n    var _this4 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    } // find the playlist object if the target playlist has been\n    // specified by URI\n\n\n    if (typeof playlist === 'string') {\n      if (!this.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.master.playlists[playlist];\n    }\n\n    window$1.clearTimeout(this.finalRenditionTimeout);\n\n    if (shouldDelay) {\n      var delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;\n      this.finalRenditionTimeout = window$1.setTimeout(this.media.bind(this, playlist, false), delay);\n      return;\n    }\n\n    var startingState = this.state;\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id;\n    var masterPlaylistRef = this.master.playlists[playlist.id]; // switch to fully loaded playlists immediately\n\n    if (masterPlaylistRef && masterPlaylistRef.endList || // handle the case of a playlist object (e.g., if using vhs-json with a resolved\n    // media playlist or, for the case of demuxed audio, a resolved audio media group)\n    playlist.endList && playlist.segments.length) {\n      // abort outstanding playlist requests\n      if (this.request) {\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      }\n\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n\n        if (startingState === 'HAVE_MASTER') {\n          // The initial playlist was a master manifest, and the first media selected was\n          // also provided (in the form of a resolved playlist object) as part of the\n          // source object (rather than just a URL). Therefore, since the media playlist\n          // doesn't need to be requested, loadedmetadata won't trigger as part of the\n          // normal flow, and needs an explicit trigger here.\n          this.trigger('loadedmetadata');\n        } else {\n          this.trigger('mediachange');\n        }\n      }\n\n      return;\n    } // We update/set the timeout here so that live playlists\n    // that are not a media change will \"start\" the loader as expected.\n    // We expect that this function will start the media update timeout\n    // cycle again. This also prevents a playlist switch failure from\n    // causing us to stall during live.\n\n\n    this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op\n\n    if (!mediaChange) {\n      return;\n    }\n\n    this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n    if (this.request) {\n      if (playlist.resolvedUri === this.request.url) {\n        // requesting to switch to the same playlist multiple times\n        // has no effect after the first\n        return;\n      }\n\n      this.request.onreadystatechange = null;\n      this.request.abort();\n      this.request = null;\n    } // request the new playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.pendingMedia_ = playlist;\n    this.request = this.vhs_.xhr({\n      uri: playlist.resolvedUri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this4.request) {\n        return;\n      }\n\n      playlist.lastRequest = Date.now();\n      playlist.resolvedUri = resolveManifestRedirect(_this4.handleManifestRedirects, playlist.resolvedUri, req);\n\n      if (error) {\n        return _this4.playlistRequestError(_this4.request, playlist, startingState);\n      }\n\n      _this4.haveMetadata({\n        playlistString: req.responseText,\n        url: playlist.uri,\n        id: playlist.id\n      }); // fire loadedmetadata the first time a media playlist is loaded\n\n\n      if (startingState === 'HAVE_MASTER') {\n        _this4.trigger('loadedmetadata');\n      } else {\n        _this4.trigger('mediachange');\n      }\n    });\n  }\n  /**\n   * pause loading of the playlist\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    this.stopRequest();\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    } // Need to restore state now that no activity is happening\n\n\n    if (this.state === 'SWITCHING_MEDIA') {\n      // if the loader was in the process of switching media, it should either return to\n      // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n      // playlist yet. This is determined by the existence of loader.media_\n      if (this.media_) {\n        this.state = 'HAVE_METADATA';\n      } else {\n        this.state = 'HAVE_MASTER';\n      }\n    } else if (this.state === 'HAVE_CURRENT_METADATA') {\n      this.state = 'HAVE_METADATA';\n    }\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.load = function load(shouldDelay) {\n    var _this5 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    var media = this.media();\n\n    if (shouldDelay) {\n      var delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        _this5.mediaUpdateTimeout = null;\n\n        _this5.load();\n      }, delay);\n      return;\n    }\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.updateMediaUpdateTimeout_ = function updateMediaUpdateTimeout_(delay) {\n    var _this6 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    } // we only have use mediaupdatetimeout for live playlists.\n\n\n    if (!this.media() || this.media().endList) {\n      return;\n    }\n\n    this.mediaUpdateTimeout = window$1.setTimeout(function () {\n      _this6.mediaUpdateTimeout = null;\n\n      _this6.trigger('mediaupdatetimeout');\n\n      _this6.updateMediaUpdateTimeout_(delay);\n    }, delay);\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.start = function start() {\n    var _this7 = this;\n\n    this.started = true;\n\n    if (typeof this.src === 'object') {\n      // in the case of an entirely constructed manifest object (meaning there's no actual\n      // manifest on a server), default the uri to the page's href\n      if (!this.src.uri) {\n        this.src.uri = window$1.location.href;\n      } // resolvedUri is added on internally after the initial request. Since there's no\n      // request for pre-resolved manifests, add on resolvedUri here.\n\n\n      this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first\n      // request can be skipped (since the top level of the manifest, at a minimum, is\n      // already available as a parsed manifest object). However, if the manifest object\n      // represents a master playlist, some media playlists may need to be resolved before\n      // the starting segment list is available. Therefore, go directly to setup of the\n      // initial playlist, and let the normal flow continue from there.\n      //\n      // Note that the call to setup is asynchronous, as other sections of VHS may assume\n      // that the first request is asynchronous.\n\n      setTimeout(function () {\n        _this7.setupInitialPlaylist(_this7.src);\n      }, 0);\n      return;\n    } // request the specified URL\n\n\n    this.request = this.vhs_.xhr({\n      uri: this.src,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      } // clear the loader's request reference\n\n\n      _this7.request = null;\n\n      if (error) {\n        _this7.error = {\n          status: req.status,\n          message: \"HLS playlist request error at URL: \" + _this7.src + \".\",\n          responseText: req.responseText,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        };\n\n        if (_this7.state === 'HAVE_NOTHING') {\n          _this7.started = false;\n        }\n\n        return _this7.trigger('error');\n      }\n\n      _this7.src = resolveManifestRedirect(_this7.handleManifestRedirects, _this7.src, req);\n\n      var manifest = _this7.parseManifest_({\n        manifestString: req.responseText,\n        url: _this7.src\n      });\n\n      _this7.setupInitialPlaylist(manifest);\n    });\n  };\n\n  _proto.srcUri = function srcUri() {\n    return typeof this.src === 'string' ? this.src : this.src.uri;\n  }\n  /**\n   * Given a manifest object that's either a master or media playlist, trigger the proper\n   * events and set the state of the playlist loader.\n   *\n   * If the manifest object represents a master playlist, `loadedplaylist` will be\n   * triggered to allow listeners to select a playlist. If none is selected, the loader\n   * will default to the first one in the playlists array.\n   *\n   * If the manifest object represents a media playlist, `loadedplaylist` will be\n   * triggered followed by `loadedmetadata`, as the only available playlist is loaded.\n   *\n   * In the case of a media playlist, a master playlist object wrapper with one playlist\n   * will be created so that all logic can handle playlists in the same fashion (as an\n   * assumed manifest object schema).\n   *\n   * @param {Object} manifest\n   *        The parsed manifest object\n   */\n  ;\n\n  _proto.setupInitialPlaylist = function setupInitialPlaylist(manifest) {\n    this.state = 'HAVE_MASTER';\n\n    if (manifest.playlists) {\n      this.master = manifest;\n      addPropertiesToMaster(this.master, this.srcUri()); // If the initial master playlist has playlists wtih segments already resolved,\n      // then resolve URIs in advance, as they are usually done after a playlist request,\n      // which may not happen if the playlist is resolved.\n\n      manifest.playlists.forEach(function (playlist) {\n        playlist.segments = getAllSegments(playlist);\n        playlist.segments.forEach(function (segment) {\n          resolveSegmentUris(segment, playlist.resolvedUri);\n        });\n      });\n      this.trigger('loadedplaylist');\n\n      if (!this.request) {\n        // no media playlist was specifically selected so start\n        // from the first listed one\n        this.media(this.master.playlists[0]);\n      }\n\n      return;\n    } // In order to support media playlists passed in as vhs-json, the case where the uri\n    // is not provided as part of the manifest should be considered, and an appropriate\n    // default used.\n\n\n    var uri = this.srcUri() || window$1.location.href;\n    this.master = masterForMedia(manifest, uri);\n    this.haveMetadata({\n      playlistObject: manifest,\n      url: uri,\n      id: this.master.playlists[0].id\n    });\n    this.trigger('loadedmetadata');\n  };\n\n  return PlaylistLoader;\n}(EventTarget$1);\n/**\n * @file xhr.js\n */\n\n\nvar videojsXHR = videojs.xhr,\n    mergeOptions$1 = videojs.mergeOptions;\n\nvar callbackWrapper = function callbackWrapper(request, error, response, callback) {\n  var reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;\n\n  if (!error && reqResponse) {\n    request.responseTime = Date.now();\n    request.roundTripTime = request.responseTime - request.requestTime;\n    request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n\n    if (!request.bandwidth) {\n      request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n    }\n  }\n\n  if (response.headers) {\n    request.responseHeaders = response.headers;\n  } // videojs.xhr now uses a specific code on the error\n  // object to signal that a request has timed out instead\n  // of setting a boolean on the request object\n\n\n  if (error && error.code === 'ETIMEDOUT') {\n    request.timedout = true;\n  } // videojs.xhr no longer considers status codes outside of 200 and 0\n  // (for file uris) to be errors, but the old XHR did, so emulate that\n  // behavior. Status 206 may be used in response to byterange requests.\n\n\n  if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n    error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n  }\n\n  callback(error, request);\n};\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout\n    options = mergeOptions$1({\n      timeout: 45e3\n    }, options); // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n\n    var beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden\n    // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11\n\n\n    var xhrMethod = videojs.Vhs.xhr.original === true ? videojsXHR : videojs.Vhs.xhr;\n    var request = xhrMethod(options, function (error, response) {\n      return callbackWrapper(request, error, response, callback);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  xhr.original = true;\n  return xhr;\n};\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\n\n\nvar byterangeStr = function byterangeStr(byterange) {\n  // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var byterangeEnd;\n  var byterangeStart = byterange.offset;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    byterangeEnd = window$1.BigInt(byterange.offset) + window$1.BigInt(byterange.length) - window$1.BigInt(1);\n  } else {\n    byterangeEnd = byterange.offset + byterange.length - 1;\n  }\n\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\n\n\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n\n  return headers;\n};\n/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {number} i the iterator on the range to convert\n * @return {string} the range in string format\n */\n\n\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n/**\n * format a number as hex string\n *\n * @param {number} e The number\n * @param {number} i the iterator\n * @return {string} the hex formatted number as a string\n */\n\n\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\n\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n\n  return '.';\n};\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (isArrayBufferView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n  return transferable;\n};\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n *\n * @param {Object} initSegment\n *        the init segment object.\n *\n * @return {string} the generated init segment id\n */\n\n\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n/**\n * Returns a unique string identifier for a media segment key.\n *\n * @param {Object} key the encryption key\n * @return {string} the unique id for the media segment key.\n */\n\n\nvar segmentKeyId = function segmentKeyId(key) {\n  return key.resolvedUri;\n};\n/**\n * utils to help dump binary data to the console\n *\n * @param {Array|TypedArray} data\n *        data to dump to a string\n *\n * @return {string} the data as a hex string.\n */\n\n\nvar hexDump = function hexDump(data) {\n  var bytes = Array.prototype.slice.call(data);\n  var step = 16;\n  var result = '';\n  var hex;\n  var ascii;\n\n  for (var j = 0; j < bytes.length / step; j++) {\n    hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n    ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n    result += hex + ' ' + ascii + '\\n';\n  }\n\n  return result;\n};\n\nvar tagDump = function tagDump(_ref) {\n  var bytes = _ref.bytes;\n  return hexDump(bytes);\n};\n\nvar textRanges = function textRanges(ranges) {\n  var result = '';\n  var i;\n\n  for (i = 0; i < ranges.length; i++) {\n    result += textRange(ranges, i) + ' ';\n  }\n\n  return result;\n};\n\nvar utils = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId,\n  segmentKeyId: segmentKeyId,\n  hexDump: hexDump,\n  tagDump: tagDump,\n  textRanges: textRanges\n}); // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n// 25% was arbitrarily chosen, and may need to be refined over time.\n\nvar SEGMENT_END_FUDGE_PERCENT = 0.25;\n/**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\nvar playerTimeToProgramTime = function playerTimeToProgramTime(playerTime, segment) {\n  if (!segment.dateTimeObject) {\n    // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n    // be used to map the start of a segment with a real world time).\n    return null;\n  }\n\n  var transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n  var transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n  var startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n  var offsetFromSegmentStart = playerTime - startOfSegment;\n  return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n};\n\nvar originalSegmentVideoDuration = function originalSegmentVideoDuration(videoTimingInfo) {\n  return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n};\n/**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {string} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForProgramTime = function findSegmentForProgramTime(programTime, playlist) {\n  // Assumptions:\n  //  - verifyProgramDateTimeTags has already been run\n  //  - live streams have been started\n  var dateTimeObject;\n\n  try {\n    dateTimeObject = new Date(programTime);\n  } catch (e) {\n    return null;\n  }\n\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segment = playlist.segments[0];\n\n  if (dateTimeObject < segment.dateTimeObject) {\n    // Requested time is before stream start.\n    return null;\n  }\n\n  for (var i = 0; i < playlist.segments.length - 1; i++) {\n    segment = playlist.segments[i];\n    var nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n\n    if (dateTimeObject < nextSegmentStart) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n  var lastSegmentStart = lastSegment.dateTimeObject;\n  var lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n  var lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n\n  if (dateTimeObject > lastSegmentEnd) {\n    // Beyond the end of the stream, or our best guess of the end of the stream.\n    return null;\n  }\n\n  if (dateTimeObject > lastSegmentStart) {\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n    // Although, given that all segments have accurate date time objects, the segment\n    // selected should be accurate, unless the video has been transmuxed at some point\n    // (determined by the presence of the videoTimingInfo object), the segment's \"player\n    // time\" (the start time in the player) can't be considered accurate.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForPlayerTime = function findSegmentForPlayerTime(time, playlist) {\n  // Assumptions:\n  // - there will always be a segment.duration\n  // - we can start from zero\n  // - segments are in time order\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segmentEnd = 0;\n  var segment;\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n    // should contain the most accurate values we have for the segment's player times.\n    //\n    // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n    // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n    // calculate an end value.\n\n    segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n\n    if (time <= segmentEnd) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n\n  if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n    // The time requested is beyond the stream end.\n    return null;\n  }\n\n  if (time > segmentEnd) {\n    // The time is within or beyond the last segment.\n    //\n    // Check to see if the time is beyond a reasonable guess of the end of the stream.\n    if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n      // Technically, because the duration value is only an estimate, the time may still\n      // exist in the last segment, however, there isn't enough information to make even\n      // a reasonable estimate.\n      return null;\n    }\n\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n    // Because videoTimingInfo is only set after transmux, it is the only way to get\n    // accurate timing values.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {string} programTime The programTime as an ISO-8601 string\n * @return {number} offset\n */\n\n\nvar getOffsetFromTimestamp = function getOffsetFromTimestamp(comparisonTimeStamp, programTime) {\n  var segmentDateTime;\n  var programDateTime;\n\n  try {\n    segmentDateTime = new Date(comparisonTimeStamp);\n    programDateTime = new Date(programTime);\n  } catch (e) {// TODO handle error\n  }\n\n  var segmentTimeEpoch = segmentDateTime.getTime();\n  var programTimeEpoch = programDateTime.getTime();\n  return (programTimeEpoch - segmentTimeEpoch) / 1000;\n};\n/**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\n\nvar verifyProgramDateTimeTags = function verifyProgramDateTimeTags(playlist) {\n  if (!playlist.segments || playlist.segments.length === 0) {\n    return false;\n  }\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    var segment = playlist.segments[i];\n\n    if (!segment.dateTimeObject) {\n      return false;\n    }\n  }\n\n  return true;\n};\n/**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @return {string} err.message A detailed error message\n * @return {Object} programTime\n * @return {number} programTime.mediaSeconds The streamTime in seconds\n * @return {string} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\n\nvar getProgramTime = function getProgramTime(_ref) {\n  var playlist = _ref.playlist,\n      _ref$time = _ref.time,\n      time = _ref$time === void 0 ? undefined : _ref$time,\n      callback = _ref.callback;\n\n  if (!callback) {\n    throw new Error('getProgramTime: callback must be provided');\n  }\n\n  if (!playlist || time === undefined) {\n    return callback({\n      message: 'getProgramTime: playlist and time must be provided'\n    });\n  }\n\n  var matchedSegment = findSegmentForPlayerTime(time, playlist);\n\n  if (!matchedSegment) {\n    return callback({\n      message: 'valid programTime was not found'\n    });\n  }\n\n  if (matchedSegment.type === 'estimate') {\n    return callback({\n      message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n      seekTime: matchedSegment.estimatedStart\n    });\n  }\n\n  var programTimeObject = {\n    mediaSeconds: time\n  };\n  var programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n\n  if (programTime) {\n    programTimeObject.programDateTime = programTime.toISOString();\n  }\n\n  return callback(null, programTimeObject);\n};\n/**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {string} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @return {string} err.message A detailed error message\n * @return {number} newTime The exact time that was seeked to in seconds\n */\n\n\nvar seekToProgramTime = function seekToProgramTime(_ref2) {\n  var programTime = _ref2.programTime,\n      playlist = _ref2.playlist,\n      _ref2$retryCount = _ref2.retryCount,\n      retryCount = _ref2$retryCount === void 0 ? 2 : _ref2$retryCount,\n      seekTo = _ref2.seekTo,\n      _ref2$pauseAfterSeek = _ref2.pauseAfterSeek,\n      pauseAfterSeek = _ref2$pauseAfterSeek === void 0 ? true : _ref2$pauseAfterSeek,\n      tech = _ref2.tech,\n      callback = _ref2.callback;\n\n  if (!callback) {\n    throw new Error('seekToProgramTime: callback must be provided');\n  }\n\n  if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n    return callback({\n      message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n    });\n  }\n\n  if (!playlist.endList && !tech.hasStarted_) {\n    return callback({\n      message: 'player must be playing a live stream to start buffering'\n    });\n  }\n\n  if (!verifyProgramDateTimeTags(playlist)) {\n    return callback({\n      message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n    });\n  }\n\n  var matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n  if (!matchedSegment) {\n    return callback({\n      message: programTime + \" was not found in the stream\"\n    });\n  }\n\n  var segment = matchedSegment.segment;\n  var mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n\n  if (matchedSegment.type === 'estimate') {\n    // we've run out of retries\n    if (retryCount === 0) {\n      return callback({\n        message: programTime + \" is not buffered yet. Try again\"\n      });\n    }\n\n    seekTo(matchedSegment.estimatedStart + mediaOffset);\n    tech.one('seeked', function () {\n      seekToProgramTime({\n        programTime: programTime,\n        playlist: playlist,\n        retryCount: retryCount - 1,\n        seekTo: seekTo,\n        pauseAfterSeek: pauseAfterSeek,\n        tech: tech,\n        callback: callback\n      });\n    });\n    return;\n  } // Since the segment.start value is determined from the buffered end or ending time\n  // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n  // modifications.\n\n\n  var seekToTime = segment.start + mediaOffset;\n\n  var seekedCallback = function seekedCallback() {\n    return callback(null, tech.currentTime());\n  }; // listen for seeked event\n\n\n  tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n  if (pauseAfterSeek) {\n    tech.pause();\n  }\n\n  seekTo(seekToTime);\n}; // which will only happen if the request is complete.\n\n\nvar callbackOnCompleted = function callbackOnCompleted(request, cb) {\n  if (request.readyState === 4) {\n    return cb();\n  }\n\n  return;\n};\n\nvar containerRequest = function containerRequest(uri, xhr, cb) {\n  var bytes = [];\n  var id3Offset;\n  var finished = false;\n\n  var endRequestAndCallback = function endRequestAndCallback(err, req, type, _bytes) {\n    req.abort();\n    finished = true;\n    return cb(err, req, type, _bytes);\n  };\n\n  var progressListener = function progressListener(error, request) {\n    if (finished) {\n      return;\n    }\n\n    if (error) {\n      return endRequestAndCallback(error, request, '', bytes);\n    } // grap the new part of content that was just downloaded\n\n\n    var newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes\n\n    bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));\n    id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type\n    // or we need at least two bytes after an id3Offset\n\n    if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    var type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data\n    // to see the second sync byte, wait until we have enough data\n    // before declaring it ts\n\n    if (type === 'ts' && bytes.length < 188) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    } // this may be an unsynced ts segment\n    // wait for 376 bytes before detecting no container\n\n\n    if (!type && bytes.length < 376) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    return endRequestAndCallback(null, request, type, bytes);\n  };\n\n  var options = {\n    uri: uri,\n    beforeSend: function beforeSend(request) {\n      // this forces the browser to pass the bytes to us unprocessed\n      request.overrideMimeType('text/plain; charset=x-user-defined');\n      request.addEventListener('progress', function (_ref) {\n        _ref.total;\n        _ref.loaded;\n        return callbackWrapper(request, null, {\n          statusCode: request.status\n        }, progressListener);\n      });\n    }\n  };\n  var request = xhr(options, function (error, response) {\n    return callbackWrapper(request, error, response, progressListener);\n  });\n  return request;\n};\n\nvar EventTarget = videojs.EventTarget,\n    mergeOptions = videojs.mergeOptions;\n\nvar dashPlaylistUnchanged = function dashPlaylistUnchanged(a, b) {\n  if (!isPlaylistUnchanged(a, b)) {\n    return false;\n  } // for dash the above check will often return true in scenarios where\n  // the playlist actually has changed because mediaSequence isn't a\n  // dash thing, and we often set it to 1. So if the playlists have the same amount\n  // of segments we return true.\n  // So for dash we need to make sure that the underlying segments are different.\n  // if sidx changed then the playlists are different.\n\n\n  if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {\n    return false;\n  } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {\n    return false;\n  } // one or the other does not have segments\n  // there was a change.\n\n\n  if (a.segments && !b.segments || !a.segments && b.segments) {\n    return false;\n  } // neither has segments nothing changed\n\n\n  if (!a.segments && !b.segments) {\n    return true;\n  } // check segments themselves\n\n\n  for (var i = 0; i < a.segments.length; i++) {\n    var aSegment = a.segments[i];\n    var bSegment = b.segments[i]; // if uris are different between segments there was a change\n\n    if (aSegment.uri !== bSegment.uri) {\n      return false;\n    } // neither segment has a byterange, there will be no byterange change.\n\n\n    if (!aSegment.byterange && !bSegment.byterange) {\n      continue;\n    }\n\n    var aByterange = aSegment.byterange;\n    var bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.\n\n    if (aByterange && !bByterange || !aByterange && bByterange) {\n      return false;\n    } // if both segments have byterange with different offsets, there was a change.\n\n\n    if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {\n      return false;\n    }\n  } // if everything was the same with segments, this is the same playlist.\n\n\n  return true;\n};\n/**\n * Use the representation IDs from the mpd object to create groupIDs, the NAME is set to mandatory representation\n * ID in the parser. This allows for continuous playout across periods with the same representation IDs\n * (continuous periods as defined in DASH-IF 3.2.12). This is assumed in the mpd-parser as well. If we want to support\n * periods without continuous playback this function may need modification as well as the parser.\n */\n\n\nvar dashGroupId = function dashGroupId(type, group, label, playlist) {\n  // If the manifest somehow does not have an ID (non-dash compliant), use the label.\n  var playlistId = playlist.attributes.NAME || label;\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + playlistId;\n};\n/**\n * Parses the master XML string and updates playlist URI references.\n *\n * @param {Object} config\n *        Object of arguments\n * @param {string} config.masterXml\n *        The mpd XML\n * @param {string} config.srcUrl\n *        The mpd URL\n * @param {Date} config.clientOffset\n *         A time difference between server and client\n * @param {Object} config.sidxMapping\n *        SIDX mappings for moof/mdat URIs and byte ranges\n * @return {Object}\n *         The parsed mpd manifest object\n */\n\n\nvar parseMasterXml = function parseMasterXml(_ref) {\n  var masterXml = _ref.masterXml,\n      srcUrl = _ref.srcUrl,\n      clientOffset = _ref.clientOffset,\n      sidxMapping = _ref.sidxMapping,\n      previousManifest = _ref.previousManifest;\n  var manifest = parse(masterXml, {\n    manifestUri: srcUrl,\n    clientOffset: clientOffset,\n    sidxMapping: sidxMapping,\n    previousManifest: previousManifest\n  });\n  addPropertiesToMaster(manifest, srcUrl, dashGroupId);\n  return manifest;\n};\n/**\n * Removes any mediaGroup labels that no longer exist in the newMaster\n *\n * @param {Object} update\n *         The previous mpd object being updated\n * @param {Object} newMaster\n *         The new mpd object\n */\n\n\nvar removeOldMediaGroupLabels = function removeOldMediaGroupLabels(update, newMaster) {\n  forEachMediaGroup(update, function (properties, type, group, label) {\n    if (!(label in newMaster.mediaGroups[type][group])) {\n      delete update.mediaGroups[type][group][label];\n    }\n  });\n};\n/**\n * Returns a new master manifest that is the result of merging an updated master manifest\n * into the original version.\n *\n * @param {Object} oldMaster\n *        The old parsed mpd object\n * @param {Object} newMaster\n *        The updated parsed mpd object\n * @return {Object}\n *         A new object representing the original master manifest with the updated media\n *         playlists merged in\n */\n\n\nvar updateMaster = function updateMaster(oldMaster, newMaster, sidxMapping) {\n  var noChanges = true;\n  var update = mergeOptions(oldMaster, {\n    // These are top level properties that can be updated\n    duration: newMaster.duration,\n    minimumUpdatePeriod: newMaster.minimumUpdatePeriod,\n    timelineStarts: newMaster.timelineStarts\n  }); // First update the playlists in playlist list\n\n  for (var i = 0; i < newMaster.playlists.length; i++) {\n    var playlist = newMaster.playlists[i];\n\n    if (playlist.sidx) {\n      var sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already\n\n      if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {\n        addSidxSegmentsToPlaylist(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);\n      }\n    }\n\n    var playlistUpdate = updateMaster$1(update, playlist, dashPlaylistUnchanged);\n\n    if (playlistUpdate) {\n      update = playlistUpdate;\n      noChanges = false;\n    }\n  } // Then update media group playlists\n\n\n  forEachMediaGroup(newMaster, function (properties, type, group, label) {\n    if (properties.playlists && properties.playlists.length) {\n      var id = properties.playlists[0].id;\n\n      var _playlistUpdate = updateMaster$1(update, properties.playlists[0], dashPlaylistUnchanged);\n\n      if (_playlistUpdate) {\n        update = _playlistUpdate; // add new mediaGroup label if it doesn't exist and assign the new mediaGroup.\n\n        if (!(label in update.mediaGroups[type][group])) {\n          update.mediaGroups[type][group][label] = properties;\n        } // update the playlist reference within media groups\n\n\n        update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];\n        noChanges = false;\n      }\n    }\n  }); // remove mediaGroup labels and references that no longer exist in the newMaster\n\n  removeOldMediaGroupLabels(update, newMaster);\n\n  if (newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n    noChanges = false;\n  }\n\n  if (noChanges) {\n    return null;\n  }\n\n  return update;\n}; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n// If the SIDXs have maps, the two maps should match,\n// both `a` and `b` missing SIDXs is considered matching.\n// If `a` or `b` but not both have a map, they aren't matching.\n\n\nvar equivalentSidx = function equivalentSidx(a, b) {\n  var neitherMap = Boolean(!a.map && !b.map);\n  var equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n  return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n}; // exported for testing\n\n\nvar compareSidxEntry = function compareSidxEntry(playlists, oldSidxMapping) {\n  var newSidxMapping = {};\n\n  for (var id in playlists) {\n    var playlist = playlists[id];\n    var currentSidxInfo = playlist.sidx;\n\n    if (currentSidxInfo) {\n      var key = generateSidxKey(currentSidxInfo);\n\n      if (!oldSidxMapping[key]) {\n        break;\n      }\n\n      var savedSidxInfo = oldSidxMapping[key].sidxInfo;\n\n      if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n        newSidxMapping[key] = oldSidxMapping[key];\n      }\n    }\n  }\n\n  return newSidxMapping;\n};\n/**\n *  A function that filters out changed items as they need to be requested separately.\n *\n *  The method is exported for testing\n *\n *  @param {Object} master the parsed mpd XML returned via mpd-parser\n *  @param {Object} oldSidxMapping the SIDX to compare against\n */\n\n\nvar filterChangedSidxMappings = function filterChangedSidxMappings(master, oldSidxMapping) {\n  var videoSidx = compareSidxEntry(master.playlists, oldSidxMapping);\n  var mediaGroupSidx = videoSidx;\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (properties.playlists && properties.playlists.length) {\n      var playlists = properties.playlists;\n      mediaGroupSidx = mergeOptions(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n    }\n  });\n  return mediaGroupSidx;\n};\n\nvar DashPlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(DashPlaylistLoader, _EventTarget); // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n  // playlist loader setups from media groups will expect to be able to pass a playlist\n  // (since there aren't external URLs to media playlists with DASH)\n\n\n  function DashPlaylistLoader(srcUrlOrPlaylist, vhs, options, masterPlaylistLoader) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.masterPlaylistLoader_ = masterPlaylistLoader || _assertThisInitialized(_this);\n\n    if (!masterPlaylistLoader) {\n      _this.isMaster_ = true;\n    }\n\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n\n    if (!srcUrlOrPlaylist) {\n      throw new Error('A non-empty playlist URL or object is required');\n    } // event naming?\n\n\n    _this.on('minimumUpdatePeriod', function () {\n      _this.refreshXml_();\n    }); // live playlist staleness timeout\n\n\n    _this.on('mediaupdatetimeout', function () {\n      _this.refreshMedia_(_this.media().id);\n    });\n\n    _this.state = 'HAVE_NOTHING';\n    _this.loadedPlaylists_ = {};\n    _this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state\n    // The masterPlaylistLoader will be created with a string\n\n    if (_this.isMaster_) {\n      _this.masterPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n      // once multi-period is refactored\n\n      _this.masterPlaylistLoader_.sidxMapping_ = {};\n    } else {\n      _this.childPlaylist_ = srcUrlOrPlaylist;\n    }\n\n    return _this;\n  }\n\n  var _proto = DashPlaylistLoader.prototype;\n\n  _proto.requestErrored_ = function requestErrored_(err, request, startingState) {\n    // disposed\n    if (!this.request) {\n      return true;\n    } // pending request is cleared\n\n\n    this.request = null;\n\n    if (err) {\n      // use the provided error object or create one\n      // based on the request/response\n      this.error = typeof err === 'object' && !(err instanceof Error) ? err : {\n        status: request.status,\n        message: 'DASH request error at URL: ' + request.uri,\n        response: request.response,\n        // MEDIA_ERR_NETWORK\n        code: 2\n      };\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.trigger('error');\n      return true;\n    }\n  }\n  /**\n   * Verify that the container of the sidx segment can be parsed\n   * and if it can, get and parse that segment.\n   */\n  ;\n\n  _proto.addSidxSegments_ = function addSidxSegments_(playlist, startingState, cb) {\n    var _this2 = this;\n\n    var sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.\n\n    if (!playlist.sidx || !sidxKey || this.masterPlaylistLoader_.sidxMapping_[sidxKey]) {\n      // keep this function async\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return cb(false);\n      }, 0);\n      return;\n    } // resolve the segment URL relative to the playlist\n\n\n    var uri = resolveManifestRedirect(this.handleManifestRedirects, playlist.sidx.resolvedUri);\n\n    var fin = function fin(err, request) {\n      if (_this2.requestErrored_(err, request, startingState)) {\n        return;\n      }\n\n      var sidxMapping = _this2.masterPlaylistLoader_.sidxMapping_;\n      var sidx;\n\n      try {\n        sidx = parseSidx(toUint8(request.response).subarray(8));\n      } catch (e) {\n        // sidx parsing failed.\n        _this2.requestErrored_(e, request, startingState);\n\n        return;\n      }\n\n      sidxMapping[sidxKey] = {\n        sidxInfo: playlist.sidx,\n        sidx: sidx\n      };\n      addSidxSegmentsToPlaylist(playlist, sidx, playlist.sidx.resolvedUri);\n      return cb(true);\n    };\n\n    this.request = containerRequest(uri, this.vhs_.xhr, function (err, request, container, bytes) {\n      if (err) {\n        return fin(err, request);\n      }\n\n      if (!container || container !== 'mp4') {\n        return fin({\n          status: request.status,\n          message: \"Unsupported \" + (container || 'unknown') + \" container type for sidx segment at URL: \" + uri,\n          // response is just bytes in this case\n          // but we really don't want to return that.\n          response: '',\n          playlist: playlist,\n          internal: true,\n          blacklistDuration: Infinity,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        }, request);\n      } // if we already downloaded the sidx bytes in the container request, use them\n\n\n      var _playlist$sidx$bytera = playlist.sidx.byterange,\n          offset = _playlist$sidx$bytera.offset,\n          length = _playlist$sidx$bytera.length;\n\n      if (bytes.length >= length + offset) {\n        return fin(err, {\n          response: bytes.subarray(offset, offset + length),\n          status: request.status,\n          uri: request.uri\n        });\n      } // otherwise request sidx bytes\n\n\n      _this2.request = _this2.vhs_.xhr({\n        uri: uri,\n        responseType: 'arraybuffer',\n        headers: segmentXhrHeaders({\n          byterange: playlist.sidx.byterange\n        })\n      }, fin);\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    this.loadedPlaylists_ = {};\n    window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n    window$1.clearTimeout(this.mediaRequest_);\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    this.mediaRequest_ = null;\n    this.minimumUpdatePeriodTimeout_ = null;\n\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.off();\n  };\n\n  _proto.hasPendingRequest = function hasPendingRequest() {\n    return this.request || this.mediaRequest_;\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  };\n\n  _proto.media = function media(playlist) {\n    var _this3 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    }\n\n    var startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n    if (typeof playlist === 'string') {\n      if (!this.masterPlaylistLoader_.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.masterPlaylistLoader_.master.playlists[playlist];\n    }\n\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately\n\n    if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n        this.trigger('mediachange');\n      }\n\n      return;\n    } // switching to the active playlist is a no-op\n\n\n    if (!mediaChange) {\n      return;\n    } // switching from an already loaded playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.addSidxSegments_(playlist, startingState, function (sidxChanged) {\n      // everything is ready just continue to haveMetadata\n      _this3.haveMetadata({\n        startingState: startingState,\n        playlist: playlist\n      });\n    });\n  };\n\n  _proto.haveMetadata = function haveMetadata(_ref2) {\n    var startingState = _ref2.startingState,\n        playlist = _ref2.playlist;\n    this.state = 'HAVE_METADATA';\n    this.loadedPlaylists_[playlist.id] = playlist;\n    this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n    this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded\n    // to resolve setup of media groups\n\n    if (startingState === 'HAVE_MASTER') {\n      this.trigger('loadedmetadata');\n    } else {\n      // trigger media change if the active media has been updated\n      this.trigger('mediachange');\n    }\n  };\n\n  _proto.pause = function pause() {\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n\n    if (this.isMaster_) {\n      window$1.clearTimeout(this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_);\n      this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    }\n  };\n\n  _proto.load = function load(isFinalRendition) {\n    var _this4 = this;\n\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    var media = this.media();\n\n    if (isFinalRendition) {\n      var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        return _this4.load();\n      }, delay);\n      return;\n    } // because the playlists are internal to the manifest, load should either load the\n    // main manifest, or do nothing but trigger an event\n\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      // Check to see if this is the master loader and the MUP was cleared (this happens\n      // when the loader was paused). `media` should be set at this point since one is always\n      // set during `start()`.\n      if (this.isMaster_ && !this.minimumUpdatePeriodTimeout_) {\n        // Trigger minimumUpdatePeriod to refresh the master manifest\n        this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated\n\n        this.updateMinimumUpdatePeriodTimeout_();\n      }\n\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.start = function start() {\n    var _this5 = this;\n\n    this.started = true; // We don't need to request the master manifest again\n    // Call this asynchronously to match the xhr request behavior below\n\n    if (!this.isMaster_) {\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return _this5.haveMaster_();\n      }, 0);\n      return;\n    }\n\n    this.requestMaster_(function (req, masterChanged) {\n      _this5.haveMaster_();\n\n      if (!_this5.hasPendingRequest() && !_this5.media_) {\n        _this5.media(_this5.masterPlaylistLoader_.master.playlists[0]);\n      }\n    });\n  };\n\n  _proto.requestMaster_ = function requestMaster_(cb) {\n    var _this6 = this;\n\n    this.request = this.vhs_.xhr({\n      uri: this.masterPlaylistLoader_.srcUrl,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      if (_this6.requestErrored_(error, req)) {\n        if (_this6.state === 'HAVE_NOTHING') {\n          _this6.started = false;\n        }\n\n        return;\n      }\n\n      var masterChanged = req.responseText !== _this6.masterPlaylistLoader_.masterXml_;\n      _this6.masterPlaylistLoader_.masterXml_ = req.responseText;\n\n      if (req.responseHeaders && req.responseHeaders.date) {\n        _this6.masterLoaded_ = Date.parse(req.responseHeaders.date);\n      } else {\n        _this6.masterLoaded_ = Date.now();\n      }\n\n      _this6.masterPlaylistLoader_.srcUrl = resolveManifestRedirect(_this6.handleManifestRedirects, _this6.masterPlaylistLoader_.srcUrl, req);\n\n      if (masterChanged) {\n        _this6.handleMaster_();\n\n        _this6.syncClientServerClock_(function () {\n          return cb(req, masterChanged);\n        });\n\n        return;\n      }\n\n      return cb(req, masterChanged);\n    });\n  }\n  /**\n   * Parses the master xml for UTCTiming node to sync the client clock to the server\n   * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n   *\n   * @param {Function} done\n   *        Function to call when clock sync has completed\n   */\n  ;\n\n  _proto.syncClientServerClock_ = function syncClientServerClock_(done) {\n    var _this7 = this;\n\n    var utcTiming = parseUTCTiming(this.masterPlaylistLoader_.masterXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n    // server clock\n\n    if (utcTiming === null) {\n      this.masterPlaylistLoader_.clientOffset_ = this.masterLoaded_ - Date.now();\n      return done();\n    }\n\n    if (utcTiming.method === 'DIRECT') {\n      this.masterPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();\n      return done();\n    }\n\n    this.request = this.vhs_.xhr({\n      uri: resolveUrl(this.masterPlaylistLoader_.srcUrl, utcTiming.value),\n      method: utcTiming.method,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      }\n\n      if (error) {\n        // sync request failed, fall back to using date header from mpd\n        // TODO: log warning\n        _this7.masterPlaylistLoader_.clientOffset_ = _this7.masterLoaded_ - Date.now();\n        return done();\n      }\n\n      var serverTime;\n\n      if (utcTiming.method === 'HEAD') {\n        if (!req.responseHeaders || !req.responseHeaders.date) {\n          // expected date header not preset, fall back to using date header from mpd\n          // TODO: log warning\n          serverTime = _this7.masterLoaded_;\n        } else {\n          serverTime = Date.parse(req.responseHeaders.date);\n        }\n      } else {\n        serverTime = Date.parse(req.responseText);\n      }\n\n      _this7.masterPlaylistLoader_.clientOffset_ = serverTime - Date.now();\n      done();\n    });\n  };\n\n  _proto.haveMaster_ = function haveMaster_() {\n    this.state = 'HAVE_MASTER';\n\n    if (this.isMaster_) {\n      // We have the master playlist at this point, so\n      // trigger this to allow MasterPlaylistController\n      // to make an initial playlist selection\n      this.trigger('loadedplaylist');\n    } else if (!this.media_) {\n      // no media playlist was specifically selected so select\n      // the one the child playlist loader was created with\n      this.media(this.childPlaylist_);\n    }\n  };\n\n  _proto.handleMaster_ = function handleMaster_() {\n    // clear media request\n    this.mediaRequest_ = null;\n    var oldMaster = this.masterPlaylistLoader_.master;\n    var newMaster = parseMasterXml({\n      masterXml: this.masterPlaylistLoader_.masterXml_,\n      srcUrl: this.masterPlaylistLoader_.srcUrl,\n      clientOffset: this.masterPlaylistLoader_.clientOffset_,\n      sidxMapping: this.masterPlaylistLoader_.sidxMapping_,\n      previousManifest: oldMaster\n    }); // if we have an old master to compare the new master against\n\n    if (oldMaster) {\n      newMaster = updateMaster(oldMaster, newMaster, this.masterPlaylistLoader_.sidxMapping_);\n    } // only update master if we have a new master\n\n\n    this.masterPlaylistLoader_.master = newMaster ? newMaster : oldMaster;\n    var location = this.masterPlaylistLoader_.master.locations && this.masterPlaylistLoader_.master.locations[0];\n\n    if (location && location !== this.masterPlaylistLoader_.srcUrl) {\n      this.masterPlaylistLoader_.srcUrl = location;\n    }\n\n    if (!oldMaster || newMaster && newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n      this.updateMinimumUpdatePeriodTimeout_();\n    }\n\n    return Boolean(newMaster);\n  };\n\n  _proto.updateMinimumUpdatePeriodTimeout_ = function updateMinimumUpdatePeriodTimeout_() {\n    var mpl = this.masterPlaylistLoader_; // cancel any pending creation of mup on media\n    // a new one will be added if needed.\n\n    if (mpl.createMupOnMedia_) {\n      mpl.off('loadedmetadata', mpl.createMupOnMedia_);\n      mpl.createMupOnMedia_ = null;\n    } // clear any pending timeouts\n\n\n    if (mpl.minimumUpdatePeriodTimeout_) {\n      window$1.clearTimeout(mpl.minimumUpdatePeriodTimeout_);\n      mpl.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    var mup = mpl.master && mpl.master.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current\n    // MPD has no future validity, so a new one will need to be acquired when new\n    // media segments are to be made available. Thus, we use the target duration\n    // in this case\n\n    if (mup === 0) {\n      if (mpl.media()) {\n        mup = mpl.media().targetDuration * 1000;\n      } else {\n        mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;\n        mpl.one('loadedmetadata', mpl.createMupOnMedia_);\n      }\n    } // if minimumUpdatePeriod is invalid or <= zero, which\n    // can happen when a live video becomes VOD. skip timeout\n    // creation.\n\n\n    if (typeof mup !== 'number' || mup <= 0) {\n      if (mup < 0) {\n        this.logger_(\"found invalid minimumUpdatePeriod of \" + mup + \", not setting a timeout\");\n      }\n\n      return;\n    }\n\n    this.createMUPTimeout_(mup);\n  };\n\n  _proto.createMUPTimeout_ = function createMUPTimeout_(mup) {\n    var mpl = this.masterPlaylistLoader_;\n    mpl.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n      mpl.minimumUpdatePeriodTimeout_ = null;\n      mpl.trigger('minimumUpdatePeriod');\n      mpl.createMUPTimeout_(mup);\n    }, mup);\n  }\n  /**\n   * Sends request to refresh the master xml and updates the parsed master manifest\n   */\n  ;\n\n  _proto.refreshXml_ = function refreshXml_() {\n    var _this8 = this;\n\n    this.requestMaster_(function (req, masterChanged) {\n      if (!masterChanged) {\n        return;\n      }\n\n      if (_this8.media_) {\n        _this8.media_ = _this8.masterPlaylistLoader_.master.playlists[_this8.media_.id];\n      } // This will filter out updated sidx info from the mapping\n\n\n      _this8.masterPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(_this8.masterPlaylistLoader_.master, _this8.masterPlaylistLoader_.sidxMapping_);\n\n      _this8.addSidxSegments_(_this8.media(), _this8.state, function (sidxChanged) {\n        // TODO: do we need to reload the current playlist?\n        _this8.refreshMedia_(_this8.media().id);\n      });\n    });\n  }\n  /**\n   * Refreshes the media playlist by re-parsing the master xml and updating playlist\n   * references. If this is an alternate loader, the updated parsed manifest is retrieved\n   * from the master loader.\n   */\n  ;\n\n  _proto.refreshMedia_ = function refreshMedia_(mediaID) {\n    var _this9 = this;\n\n    if (!mediaID) {\n      throw new Error('refreshMedia_ must take a media id');\n    } // for master we have to reparse the master xml\n    // to re-create segments based on current timing values\n    // which may change media. We only skip updating master\n    // if this is the first time this.media_ is being set.\n    // as master was just parsed in that case.\n\n\n    if (this.media_ && this.isMaster_) {\n      this.handleMaster_();\n    }\n\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];\n\n    if (mediaChanged) {\n      this.media_ = playlists[mediaID];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    if (!this.mediaUpdateTimeout) {\n      var createMediaUpdateTimeout = function createMediaUpdateTimeout() {\n        if (_this9.media().endList) {\n          return;\n        }\n\n        _this9.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this9.trigger('mediaupdatetimeout');\n\n          createMediaUpdateTimeout();\n        }, refreshDelay(_this9.media(), Boolean(mediaChanged)));\n      };\n\n      createMediaUpdateTimeout();\n    }\n\n    this.trigger('loadedplaylist');\n  };\n\n  return DashPlaylistLoader;\n}(EventTarget);\n\nvar Config = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  BACK_BUFFER_LENGTH: 30,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // 0.5 MB/s\n  INITIAL_BANDWIDTH: 4194304,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  // TODO: Remove this when experimentalBufferBasedABR is removed\n  EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,\n  BUFFER_LOW_WATER_LINE_RATE: 1,\n  // If the buffer is greater than the high water line, we won't switch down\n  BUFFER_HIGH_WATER_LINE: 30\n};\n\nvar stringToArrayBuffer = function stringToArrayBuffer(string) {\n  var view = new Uint8Array(new ArrayBuffer(string.length));\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view.buffer;\n};\n/* global Blob, BlobBuilder, Worker */\n// unify worker interface\n\n\nvar browserWorkerPolyFill = function browserWorkerPolyFill(workerObj) {\n  // node only supports on/off\n  workerObj.on = workerObj.addEventListener;\n  workerObj.off = workerObj.removeEventListener;\n  return workerObj;\n};\n\nvar createObjectURL = function createObjectURL(str) {\n  try {\n    return URL.createObjectURL(new Blob([str], {\n      type: 'application/javascript'\n    }));\n  } catch (e) {\n    var blob = new BlobBuilder();\n    blob.append(str);\n    return URL.createObjectURL(blob.getBlob());\n  }\n};\n\nvar factory = function factory(code) {\n  return function () {\n    var objectUrl = createObjectURL(code);\n    var worker = browserWorkerPolyFill(new Worker(objectUrl));\n    worker.objURL = objectUrl;\n    var terminate = worker.terminate;\n    worker.on = worker.addEventListener;\n    worker.off = worker.removeEventListener;\n\n    worker.terminate = function () {\n      URL.revokeObjectURL(objectUrl);\n      return terminate.call(this);\n    };\n\n    return worker;\n  };\n};\n\nvar transform = function transform(code) {\n  return \"var browserWorkerPolyFill = \" + browserWorkerPolyFill.toString() + \";\\n\" + 'browserWorkerPolyFill(self);\\n' + code;\n};\n\nvar getWorkerString = function getWorkerString(fn) {\n  return fn.toString().replace(/^function.+?{/, '').slice(0, -1);\n};\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\n\nvar workerCode$1 = transform(getWorkerString(function () {\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * A lightweight readable stream implemention that handles event dispatching.\n   * Objects that inherit from streams should call init in their constructors.\n   */\n  var Stream = function Stream() {\n    this.init = function () {\n      var listeners = {};\n      /**\n       * Add a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} the callback to be invoked when an event of\n       * the specified type occurs\n       */\n\n      this.on = function (type, listener) {\n        if (!listeners[type]) {\n          listeners[type] = [];\n        }\n\n        listeners[type] = listeners[type].concat(listener);\n      };\n      /**\n       * Remove a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} a function previously registered for this\n       * type of event through `on`\n       */\n\n\n      this.off = function (type, listener) {\n        var index;\n\n        if (!listeners[type]) {\n          return false;\n        }\n\n        index = listeners[type].indexOf(listener);\n        listeners[type] = listeners[type].slice();\n        listeners[type].splice(index, 1);\n        return index > -1;\n      };\n      /**\n       * Trigger an event of the specified type on this stream. Any additional\n       * arguments to this function are passed as parameters to event listeners.\n       * @param type {string} the event name\n       */\n\n\n      this.trigger = function (type) {\n        var callbacks, i, length, args;\n        callbacks = listeners[type];\n\n        if (!callbacks) {\n          return;\n        } // Slicing the arguments on every invocation of this method\n        // can add a significant amount of overhead. Avoid the\n        // intermediate object creation for the common case of a\n        // single callback argument\n\n\n        if (arguments.length === 2) {\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].call(this, arguments[1]);\n          }\n        } else {\n          args = [];\n          i = arguments.length;\n\n          for (i = 1; i < arguments.length; ++i) {\n            args.push(arguments[i]);\n          }\n\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].apply(this, args);\n          }\n        }\n      };\n      /**\n       * Destroys the stream and cleans up.\n       */\n\n\n      this.dispose = function () {\n        listeners = {};\n      };\n    };\n  };\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   * @param destination {stream} the stream that will receive all `data` events\n   * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n   *                            when the current stream emits a 'done' event\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n\n\n  Stream.prototype.pipe = function (destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n    this.on('done', function (flushSource) {\n      destination.flush(flushSource);\n    });\n    this.on('partialdone', function (flushSource) {\n      destination.partialFlush(flushSource);\n    });\n    this.on('endedtimeline', function (flushSource) {\n      destination.endTimeline(flushSource);\n    });\n    this.on('reset', function (flushSource) {\n      destination.reset(flushSource);\n    });\n    return destination;\n  }; // Default stream functions that are expected to be overridden to perform\n  // actual work. These are provided by the prototype as a sort of no-op\n  // implementation so that we don't have to check for their existence in the\n  // `pipe` function above.\n\n\n  Stream.prototype.push = function (data) {\n    this.trigger('data', data);\n  };\n\n  Stream.prototype.flush = function (flushSource) {\n    this.trigger('done', flushSource);\n  };\n\n  Stream.prototype.partialFlush = function (flushSource) {\n    this.trigger('partialdone', flushSource);\n  };\n\n  Stream.prototype.endTimeline = function (flushSource) {\n    this.trigger('endedtimeline', flushSource);\n  };\n\n  Stream.prototype.reset = function (flushSource) {\n    this.trigger('reset', flushSource);\n  };\n\n  var stream = Stream;\n  var MAX_UINT32$1 = Math.pow(2, 32);\n\n  var getUint64$2 = function getUint64(uint8) {\n    var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n    var value;\n\n    if (dv.getBigUint64) {\n      value = dv.getBigUint64(0);\n\n      if (value < Number.MAX_SAFE_INTEGER) {\n        return Number(value);\n      }\n\n      return value;\n    }\n\n    return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);\n  };\n\n  var numbers = {\n    getUint64: getUint64$2,\n    MAX_UINT32: MAX_UINT32$1\n  };\n  var MAX_UINT32 = numbers.MAX_UINT32;\n  var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n  (function () {\n    var i;\n    types = {\n      avc1: [],\n      // codingname\n      avcC: [],\n      btrt: [],\n      dinf: [],\n      dref: [],\n      esds: [],\n      ftyp: [],\n      hdlr: [],\n      mdat: [],\n      mdhd: [],\n      mdia: [],\n      mfhd: [],\n      minf: [],\n      moof: [],\n      moov: [],\n      mp4a: [],\n      // codingname\n      mvex: [],\n      mvhd: [],\n      pasp: [],\n      sdtp: [],\n      smhd: [],\n      stbl: [],\n      stco: [],\n      stsc: [],\n      stsd: [],\n      stsz: [],\n      stts: [],\n      styp: [],\n      tfdt: [],\n      tfhd: [],\n      traf: [],\n      trak: [],\n      trun: [],\n      trex: [],\n      tkhd: [],\n      vmhd: []\n    }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n    // don't throw an error\n\n    if (typeof Uint8Array === 'undefined') {\n      return;\n    }\n\n    for (i in types) {\n      if (types.hasOwnProperty(i)) {\n        types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n      }\n    }\n\n    MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n    AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n    MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n    VIDEO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n    ]);\n    AUDIO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n    ]);\n    HDLR_TYPES = {\n      video: VIDEO_HDLR,\n      audio: AUDIO_HDLR\n    };\n    DREF = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // entry_count\n    0x00, 0x00, 0x00, 0x0c, // entry_size\n    0x75, 0x72, 0x6c, 0x20, // 'url' type\n    0x00, // version 0\n    0x00, 0x00, 0x01 // entry_flags\n    ]);\n    SMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, // balance, 0 means centered\n    0x00, 0x00 // reserved\n    ]);\n    STCO = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00 // entry_count\n    ]);\n    STSC = STCO;\n    STSZ = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // sample_size\n    0x00, 0x00, 0x00, 0x00 // sample_count\n    ]);\n    STTS = STCO;\n    VMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x01, // flags\n    0x00, 0x00, // graphicsmode\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n    ]);\n  })();\n\n  box = function box(type) {\n    var payload = [],\n        size = 0,\n        i,\n        result,\n        view;\n\n    for (i = 1; i < arguments.length; i++) {\n      payload.push(arguments[i]);\n    }\n\n    i = payload.length; // calculate the total size we need to allocate\n\n    while (i--) {\n      size += payload[i].byteLength;\n    }\n\n    result = new Uint8Array(size + 8);\n    view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n    view.setUint32(0, result.byteLength);\n    result.set(type, 4); // copy the payload into the result\n\n    for (i = 0, size = 8; i < payload.length; i++) {\n      result.set(payload[i], size);\n      size += payload[i].byteLength;\n    }\n\n    return result;\n  };\n\n  dinf = function dinf() {\n    return box(types.dinf, box(types.dref, DREF));\n  };\n\n  esds = function esds(track) {\n    return box(types.esds, new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    // ES_Descriptor\n    0x03, // tag, ES_DescrTag\n    0x19, // length\n    0x00, 0x00, // ES_ID\n    0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n    // DecoderConfigDescriptor\n    0x04, // tag, DecoderConfigDescrTag\n    0x11, // length\n    0x40, // object type\n    0x15, // streamType\n    0x00, 0x06, 0x00, // bufferSizeDB\n    0x00, 0x00, 0xda, 0xc0, // maxBitrate\n    0x00, 0x00, 0xda, 0xc0, // avgBitrate\n    // DecoderSpecificInfo\n    0x05, // tag, DecoderSpecificInfoTag\n    0x02, // length\n    // ISO/IEC 14496-3, AudioSpecificConfig\n    // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n    track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n    ]));\n  };\n\n  ftyp = function ftyp() {\n    return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n  };\n\n  hdlr = function hdlr(type) {\n    return box(types.hdlr, HDLR_TYPES[type]);\n  };\n\n  mdat = function mdat(data) {\n    return box(types.mdat, data);\n  };\n\n  mdhd = function mdhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x02, // creation_time\n    0x00, 0x00, 0x00, 0x03, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration\n    0x55, 0xc4, // 'und' language (undetermined)\n    0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n    // defined. The sample rate can be parsed out of an ADTS header, for\n    // instance.\n\n    if (track.samplerate) {\n      result[12] = track.samplerate >>> 24 & 0xFF;\n      result[13] = track.samplerate >>> 16 & 0xFF;\n      result[14] = track.samplerate >>> 8 & 0xFF;\n      result[15] = track.samplerate & 0xFF;\n    }\n\n    return box(types.mdhd, result);\n  };\n\n  mdia = function mdia(track) {\n    return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n  };\n\n  mfhd = function mfhd(sequenceNumber) {\n    return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags\n    (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n    ]));\n  };\n\n  minf = function minf(track) {\n    return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n  };\n\n  moof = function moof(sequenceNumber, tracks) {\n    var trackFragments = [],\n        i = tracks.length; // build traf boxes for each track fragment\n\n    while (i--) {\n      trackFragments[i] = traf(tracks[i]);\n    }\n\n    return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n  };\n  /**\n   * Returns a movie box.\n   * @param tracks {array} the tracks associated with this movie\n   * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n   */\n\n\n  moov = function moov(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trak(tracks[i]);\n    }\n\n    return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n  };\n\n  mvex = function mvex(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trex(tracks[i]);\n    }\n\n    return box.apply(null, [types.mvex].concat(boxes));\n  };\n\n  mvhd = function mvhd(duration) {\n    var bytes = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // creation_time\n    0x00, 0x00, 0x00, 0x02, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration\n    0x00, 0x01, 0x00, 0x00, // 1.0 rate\n    0x01, 0x00, // 1.0 volume\n    0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n    0xff, 0xff, 0xff, 0xff // next_track_ID\n    ]);\n    return box(types.mvhd, bytes);\n  };\n\n  sdtp = function sdtp(track) {\n    var samples = track.samples || [],\n        bytes = new Uint8Array(4 + samples.length),\n        flags,\n        i; // leave the full box header (4 bytes) all zero\n    // write the sample table\n\n    for (i = 0; i < samples.length; i++) {\n      flags = samples[i].flags;\n      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n    }\n\n    return box(types.sdtp, bytes);\n  };\n\n  stbl = function stbl(track) {\n    return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n  };\n\n  (function () {\n    var videoSample, audioSample;\n\n    stsd = function stsd(track) {\n      return box(types.stsd, new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n    };\n\n    videoSample = function videoSample(track) {\n      var sps = track.sps || [],\n          pps = track.pps || [],\n          sequenceParameterSets = [],\n          pictureParameterSets = [],\n          i,\n          avc1Box; // assemble the SPSs\n\n      for (i = 0; i < sps.length; i++) {\n        sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n        sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n        sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n      } // assemble the PPSs\n\n\n      for (i = 0; i < pps.length; i++) {\n        pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n        pictureParameterSets.push(pps[i].byteLength & 0xFF);\n        pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n      }\n\n      avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n      (track.width & 0xff00) >> 8, track.width & 0xff, // width\n      (track.height & 0xff00) >> 8, track.height & 0xff, // height\n      0x00, 0x48, 0x00, 0x00, // horizresolution\n      0x00, 0x48, 0x00, 0x00, // vertresolution\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // frame_count\n      0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname\n      0x00, 0x18, // depth = 24\n      0x11, 0x11 // pre_defined = -1\n      ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion\n      track.profileIdc, // AVCProfileIndication\n      track.profileCompatibility, // profile_compatibility\n      track.levelIdc, // AVCLevelIndication\n      0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n      ].concat([sps.length], // numOfSequenceParameterSets\n      sequenceParameterSets, // \"SPS\"\n      [pps.length], // numOfPictureParameterSets\n      pictureParameterSets // \"PPS\"\n      ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n      0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n      0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n      ]))];\n\n      if (track.sarRatio) {\n        var hSpacing = track.sarRatio[0],\n            vSpacing = track.sarRatio[1];\n        avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n      }\n\n      return box.apply(null, avc1Box);\n    };\n\n    audioSample = function audioSample(track) {\n      return box(types.mp4a, new Uint8Array([// SampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      // AudioSampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount\n      (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n      // MP4AudioSampleEntry, ISO/IEC 14496-14\n      ]), esds(track));\n    };\n  })();\n\n  tkhd = function tkhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x07, // flags\n    0x00, 0x00, 0x00, 0x00, // creation_time\n    0x00, 0x00, 0x00, 0x00, // modification_time\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x00, // reserved\n    (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, // layer\n    0x00, 0x00, // alternate_group\n    0x01, 0x00, // non-audio track volume\n    0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width\n    (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n    ]);\n    return box(types.tkhd, result);\n  };\n  /**\n   * Generate a track fragment (traf) box. A traf box collects metadata\n   * about tracks in a movie fragment (moof) box.\n   */\n\n\n  traf = function traf(track) {\n    var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n    trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x3a, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x00, 0x00, 0x00 // default_sample_flags\n    ]));\n    upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);\n    lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);\n    trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1\n    0x00, 0x00, 0x00, // flags\n    // baseMediaDecodeTime\n    upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n    // the containing moof to the first payload byte of the associated\n    // mdat\n\n    dataOffset = 32 + // tfhd\n    20 + // tfdt\n    8 + // traf header\n    16 + // mfhd\n    8 + // moof header\n    8; // mdat header\n    // audio tracks require less metadata\n\n    if (track.type === 'audio') {\n      trackFragmentRun = trun$1(track, dataOffset);\n      return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n    } // video tracks should contain an independent and disposable samples\n    // box (sdtp)\n    // generate one and adjust offsets to match\n\n\n    sampleDependencyTable = sdtp(track);\n    trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);\n    return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n  };\n  /**\n   * Generate a track box.\n   * @param track {object} a track definition\n   * @return {Uint8Array} the track box\n   */\n\n\n  trak = function trak(track) {\n    track.duration = track.duration || 0xffffffff;\n    return box(types.trak, tkhd(track), mdia(track));\n  };\n\n  trex = function trex(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x01, 0x00, 0x01 // default_sample_flags\n    ]); // the last two bytes of default_sample_flags is the sample\n    // degradation priority, a hint about the importance of this sample\n    // relative to others. Lower the degradation priority for all sample\n    // types other than video.\n\n    if (track.type !== 'video') {\n      result[result.length - 1] = 0x00;\n    }\n\n    return box(types.trex, result);\n  };\n\n  (function () {\n    var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n    // duration is present for the first sample, it will be present for\n    // all subsequent samples.\n    // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n    trunHeader = function trunHeader(samples, offset) {\n      var durationPresent = 0,\n          sizePresent = 0,\n          flagsPresent = 0,\n          compositionTimeOffset = 0; // trun flag constants\n\n      if (samples.length) {\n        if (samples[0].duration !== undefined) {\n          durationPresent = 0x1;\n        }\n\n        if (samples[0].size !== undefined) {\n          sizePresent = 0x2;\n        }\n\n        if (samples[0].flags !== undefined) {\n          flagsPresent = 0x4;\n        }\n\n        if (samples[0].compositionTimeOffset !== undefined) {\n          compositionTimeOffset = 0x8;\n        }\n      }\n\n      return [0x00, // version 0\n      0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags\n      (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count\n      (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n      ];\n    };\n\n    videoTrun = function videoTrun(track, offset) {\n      var bytesOffest, bytes, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 16 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 16);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n\n        bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;\n        bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags\n\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    audioTrun = function audioTrun(track, offset) {\n      var bytes, bytesOffest, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 8 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 8);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    trun$1 = function trun(track, offset) {\n      if (track.type === 'audio') {\n        return audioTrun(track, offset);\n      }\n\n      return videoTrun(track, offset);\n    };\n  })();\n\n  var mp4Generator = {\n    ftyp: ftyp,\n    mdat: mdat,\n    moof: moof,\n    moov: moov,\n    initSegment: function initSegment(tracks) {\n      var fileType = ftyp(),\n          movie = moov(tracks),\n          result;\n      result = new Uint8Array(fileType.byteLength + movie.byteLength);\n      result.set(fileType);\n      result.set(movie, fileType.byteLength);\n      return result;\n    }\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n  // Convert an array of nal units into an array of frames with each frame being\n  // composed of the nal units that make up that frame\n  // Also keep track of cummulative data about the frame from the nal units such\n  // as the frame duration, starting pts, etc.\n\n  var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {\n    var i,\n        currentNal,\n        currentFrame = [],\n        frames = []; // TODO added for LHLS, make sure this is OK\n\n    frames.byteLength = 0;\n    frames.nalCount = 0;\n    frames.duration = 0;\n    currentFrame.byteLength = 0;\n\n    for (i = 0; i < nalUnits.length; i++) {\n      currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n      if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        // Since the very first nal unit is expected to be an AUD\n        // only push to the frames array when currentFrame is not empty\n        if (currentFrame.length) {\n          currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n          frames.byteLength += currentFrame.byteLength;\n          frames.nalCount += currentFrame.length;\n          frames.duration += currentFrame.duration;\n          frames.push(currentFrame);\n        }\n\n        currentFrame = [currentNal];\n        currentFrame.byteLength = currentNal.data.byteLength;\n        currentFrame.pts = currentNal.pts;\n        currentFrame.dts = currentNal.dts;\n      } else {\n        // Specifically flag key frames for ease of use later\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          currentFrame.keyFrame = true;\n        }\n\n        currentFrame.duration = currentNal.dts - currentFrame.dts;\n        currentFrame.byteLength += currentNal.data.byteLength;\n        currentFrame.push(currentNal);\n      }\n    } // For the last frame, use the duration of the previous frame if we\n    // have nothing better to go on\n\n\n    if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n      currentFrame.duration = frames[frames.length - 1].duration;\n    } // Push the final frame\n    // TODO added for LHLS, make sure this is OK\n\n\n    frames.byteLength += currentFrame.byteLength;\n    frames.nalCount += currentFrame.length;\n    frames.duration += currentFrame.duration;\n    frames.push(currentFrame);\n    return frames;\n  }; // Convert an array of frames into an array of Gop with each Gop being composed\n  // of the frames that make up that Gop\n  // Also keep track of cummulative data about the Gop from the frames such as the\n  // Gop duration, starting pts, etc.\n\n\n  var groupFramesIntoGops = function groupFramesIntoGops(frames) {\n    var i,\n        currentFrame,\n        currentGop = [],\n        gops = []; // We must pre-set some of the values on the Gop since we\n    // keep running totals of these values\n\n    currentGop.byteLength = 0;\n    currentGop.nalCount = 0;\n    currentGop.duration = 0;\n    currentGop.pts = frames[0].pts;\n    currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n    gops.byteLength = 0;\n    gops.nalCount = 0;\n    gops.duration = 0;\n    gops.pts = frames[0].pts;\n    gops.dts = frames[0].dts;\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      if (currentFrame.keyFrame) {\n        // Since the very first frame is expected to be an keyframe\n        // only push to the gops array when currentGop is not empty\n        if (currentGop.length) {\n          gops.push(currentGop);\n          gops.byteLength += currentGop.byteLength;\n          gops.nalCount += currentGop.nalCount;\n          gops.duration += currentGop.duration;\n        }\n\n        currentGop = [currentFrame];\n        currentGop.nalCount = currentFrame.length;\n        currentGop.byteLength = currentFrame.byteLength;\n        currentGop.pts = currentFrame.pts;\n        currentGop.dts = currentFrame.dts;\n        currentGop.duration = currentFrame.duration;\n      } else {\n        currentGop.duration += currentFrame.duration;\n        currentGop.nalCount += currentFrame.length;\n        currentGop.byteLength += currentFrame.byteLength;\n        currentGop.push(currentFrame);\n      }\n    }\n\n    if (gops.length && currentGop.duration <= 0) {\n      currentGop.duration = gops[gops.length - 1].duration;\n    }\n\n    gops.byteLength += currentGop.byteLength;\n    gops.nalCount += currentGop.nalCount;\n    gops.duration += currentGop.duration; // push the final Gop\n\n    gops.push(currentGop);\n    return gops;\n  };\n  /*\n   * Search for the first keyframe in the GOPs and throw away all frames\n   * until that keyframe. Then extend the duration of the pulled keyframe\n   * and pull the PTS and DTS of the keyframe so that it covers the time\n   * range of the frames that were disposed.\n   *\n   * @param {Array} gops video GOPs\n   * @returns {Array} modified video GOPs\n   */\n\n\n  var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {\n    var currentGop;\n\n    if (!gops[0][0].keyFrame && gops.length > 1) {\n      // Remove the first GOP\n      currentGop = gops.shift();\n      gops.byteLength -= currentGop.byteLength;\n      gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n      // first gop to cover the time period of the\n      // frames we just removed\n\n      gops[0][0].dts = currentGop.dts;\n      gops[0][0].pts = currentGop.pts;\n      gops[0][0].duration += currentGop.duration;\n    }\n\n    return gops;\n  };\n  /**\n   * Default sample object\n   * see ISO/IEC 14496-12:2012, section 8.6.4.3\n   */\n\n\n  var createDefaultSample = function createDefaultSample() {\n    return {\n      size: 0,\n      flags: {\n        isLeading: 0,\n        dependsOn: 1,\n        isDependedOn: 0,\n        hasRedundancy: 0,\n        degradationPriority: 0,\n        isNonSyncSample: 1\n      }\n    };\n  };\n  /*\n   * Collates information from a video frame into an object for eventual\n   * entry into an MP4 sample table.\n   *\n   * @param {Object} frame the video frame\n   * @param {Number} dataOffset the byte offset to position the sample\n   * @return {Object} object containing sample table info for a frame\n   */\n\n\n  var sampleForFrame = function sampleForFrame(frame, dataOffset) {\n    var sample = createDefaultSample();\n    sample.dataOffset = dataOffset;\n    sample.compositionTimeOffset = frame.pts - frame.dts;\n    sample.duration = frame.duration;\n    sample.size = 4 * frame.length; // Space for nal unit size\n\n    sample.size += frame.byteLength;\n\n    if (frame.keyFrame) {\n      sample.flags.dependsOn = 2;\n      sample.flags.isNonSyncSample = 0;\n    }\n\n    return sample;\n  }; // generate the track's sample table from an array of gops\n\n\n  var generateSampleTable$1 = function generateSampleTable(gops, baseDataOffset) {\n    var h,\n        i,\n        sample,\n        currentGop,\n        currentFrame,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n        sample = sampleForFrame(currentFrame, dataOffset);\n        dataOffset += sample.size;\n        samples.push(sample);\n      }\n    }\n\n    return samples;\n  }; // generate the track's raw mdat data from an array of gops\n\n\n  var concatenateNalData = function concatenateNalData(gops) {\n    var h,\n        i,\n        j,\n        currentGop,\n        currentFrame,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = gops.byteLength,\n        numberOfNals = gops.nalCount,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each Gop..\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h]; // For each Frame..\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i]; // For each NAL..\n\n        for (j = 0; j < currentFrame.length; j++) {\n          currentNal = currentFrame[j];\n          view.setUint32(dataOffset, currentNal.data.byteLength);\n          dataOffset += 4;\n          data.set(currentNal.data, dataOffset);\n          dataOffset += currentNal.data.byteLength;\n        }\n      }\n    }\n\n    return data;\n  }; // generate the track's sample table from a frame\n\n\n  var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {\n    var sample,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n    sample = sampleForFrame(frame, dataOffset);\n    samples.push(sample);\n    return samples;\n  }; // generate the track's raw mdat data from a frame\n\n\n  var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {\n    var i,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = frame.byteLength,\n        numberOfNals = frame.length,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each NAL..\n\n    for (i = 0; i < frame.length; i++) {\n      currentNal = frame[i];\n      view.setUint32(dataOffset, currentNal.data.byteLength);\n      dataOffset += 4;\n      data.set(currentNal.data, dataOffset);\n      dataOffset += currentNal.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var frameUtils = {\n    groupNalsIntoFrames: groupNalsIntoFrames,\n    groupFramesIntoGops: groupFramesIntoGops,\n    extendFirstKeyFrame: extendFirstKeyFrame,\n    generateSampleTable: generateSampleTable$1,\n    concatenateNalData: concatenateNalData,\n    generateSampleTableForFrame: generateSampleTableForFrame,\n    concatenateNalDataForFrame: concatenateNalDataForFrame\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var highPrefix = [33, 16, 5, 32, 164, 27];\n  var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n\n  var zeroFill = function zeroFill(count) {\n    var a = [];\n\n    while (count--) {\n      a.push(0);\n    }\n\n    return a;\n  };\n\n  var makeTable = function makeTable(metaTable) {\n    return Object.keys(metaTable).reduce(function (obj, key) {\n      obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n        return arr.concat(part);\n      }, []));\n      return obj;\n    }, {});\n  };\n\n  var silence;\n\n  var silence_1 = function silence_1() {\n    if (!silence) {\n      // Frames-of-silence to use for filling in missing AAC frames\n      var coneOfSilence = {\n        96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n        88200: [highPrefix, [231], zeroFill(170), [56]],\n        64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n        48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n        44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n        32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n        24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n        16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n        12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n        11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n        8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n      };\n      silence = makeTable(coneOfSilence);\n    }\n\n    return silence;\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n\n  var ONE_SECOND_IN_TS$4 = 90000,\n      // 90kHz clock\n  secondsToVideoTs,\n      secondsToAudioTs,\n      videoTsToSeconds,\n      audioTsToSeconds,\n      audioTsToVideoTs,\n      videoTsToAudioTs,\n      metadataTsToSeconds;\n\n  secondsToVideoTs = function secondsToVideoTs(seconds) {\n    return seconds * ONE_SECOND_IN_TS$4;\n  };\n\n  secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n    return seconds * sampleRate;\n  };\n\n  videoTsToSeconds = function videoTsToSeconds(timestamp) {\n    return timestamp / ONE_SECOND_IN_TS$4;\n  };\n\n  audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n    return timestamp / sampleRate;\n  };\n\n  audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n    return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n  };\n\n  videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n    return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n  };\n  /**\n   * Adjust ID3 tag or caption timing information by the timeline pts values\n   * (if keepOriginalTimestamps is false) and convert to seconds\n   */\n\n\n  metadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n    return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n  };\n\n  var clock = {\n    ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,\n    secondsToVideoTs: secondsToVideoTs,\n    secondsToAudioTs: secondsToAudioTs,\n    videoTsToSeconds: videoTsToSeconds,\n    audioTsToSeconds: audioTsToSeconds,\n    audioTsToVideoTs: audioTsToVideoTs,\n    videoTsToAudioTs: videoTsToAudioTs,\n    metadataTsToSeconds: metadataTsToSeconds\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  /**\n   * Sum the `byteLength` properties of the data in each AAC frame\n   */\n\n  var sumFrameByteLengths = function sumFrameByteLengths(array) {\n    var i,\n        currentObj,\n        sum = 0; // sum the byteLength's all each nal unit in the frame\n\n    for (i = 0; i < array.length; i++) {\n      currentObj = array[i];\n      sum += currentObj.data.byteLength;\n    }\n\n    return sum;\n  }; // Possibly pad (prefix) the audio track with silence if appending this track\n  // would lead to the introduction of a gap in the audio buffer\n\n\n  var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n    var baseMediaDecodeTimeTs,\n        frameDuration = 0,\n        audioGapDuration = 0,\n        audioFillFrameCount = 0,\n        audioFillDuration = 0,\n        silentFrame,\n        i,\n        firstFrame;\n\n    if (!frames.length) {\n      return;\n    }\n\n    baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n    frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n    if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n      // insert the shortest possible amount (audio gap or audio to video gap)\n      audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n      audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n      audioFillDuration = audioFillFrameCount * frameDuration;\n    } // don't attempt to fill gaps smaller than a single frame or larger\n    // than a half second\n\n\n    if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {\n      return;\n    }\n\n    silentFrame = silence_1()[track.samplerate];\n\n    if (!silentFrame) {\n      // we don't have a silent frame pregenerated for the sample rate, so use a frame\n      // from the content instead\n      silentFrame = frames[0].data;\n    }\n\n    for (i = 0; i < audioFillFrameCount; i++) {\n      firstFrame = frames[0];\n      frames.splice(0, 0, {\n        data: silentFrame,\n        dts: firstFrame.dts - frameDuration,\n        pts: firstFrame.pts - frameDuration\n      });\n    }\n\n    track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n    return audioFillDuration;\n  }; // If the audio segment extends before the earliest allowed dts\n  // value, remove AAC frames until starts at or after the earliest\n  // allowed DTS so that we don't end up with a negative baseMedia-\n  // DecodeTime for the audio track\n\n\n  var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {\n    if (track.minSegmentDts >= earliestAllowedDts) {\n      return adtsFrames;\n    } // We will need to recalculate the earliest segment Dts\n\n\n    track.minSegmentDts = Infinity;\n    return adtsFrames.filter(function (currentFrame) {\n      // If this is an allowed frame, keep it and record it's Dts\n      if (currentFrame.dts >= earliestAllowedDts) {\n        track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n        track.minSegmentPts = track.minSegmentDts;\n        return true;\n      } // Otherwise, discard it\n\n\n      return false;\n    });\n  }; // generate the track's raw mdat data from an array of frames\n\n\n  var generateSampleTable = function generateSampleTable(frames) {\n    var i,\n        currentFrame,\n        samples = [];\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      samples.push({\n        size: currentFrame.data.byteLength,\n        duration: 1024 // For AAC audio, all samples contain 1024 samples\n\n      });\n    }\n\n    return samples;\n  }; // generate the track's sample table from an array of frames\n\n\n  var concatenateFrameData = function concatenateFrameData(frames) {\n    var i,\n        currentFrame,\n        dataOffset = 0,\n        data = new Uint8Array(sumFrameByteLengths(frames));\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      data.set(currentFrame.data, dataOffset);\n      dataOffset += currentFrame.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var audioFrameUtils = {\n    prefixWithSilence: prefixWithSilence,\n    trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n    generateSampleTable: generateSampleTable,\n    concatenateFrameData: concatenateFrameData\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ONE_SECOND_IN_TS$3 = clock.ONE_SECOND_IN_TS;\n  /**\n   * Store information about the start and end of the track and the\n   * duration for each frame/sample we process in order to calculate\n   * the baseMediaDecodeTime\n   */\n\n  var collectDtsInfo = function collectDtsInfo(track, data) {\n    if (typeof data.pts === 'number') {\n      if (track.timelineStartInfo.pts === undefined) {\n        track.timelineStartInfo.pts = data.pts;\n      }\n\n      if (track.minSegmentPts === undefined) {\n        track.minSegmentPts = data.pts;\n      } else {\n        track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n      }\n\n      if (track.maxSegmentPts === undefined) {\n        track.maxSegmentPts = data.pts;\n      } else {\n        track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n      }\n    }\n\n    if (typeof data.dts === 'number') {\n      if (track.timelineStartInfo.dts === undefined) {\n        track.timelineStartInfo.dts = data.dts;\n      }\n\n      if (track.minSegmentDts === undefined) {\n        track.minSegmentDts = data.dts;\n      } else {\n        track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n      }\n\n      if (track.maxSegmentDts === undefined) {\n        track.maxSegmentDts = data.dts;\n      } else {\n        track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n      }\n    }\n  };\n  /**\n   * Clear values used to calculate the baseMediaDecodeTime between\n   * tracks\n   */\n\n\n  var clearDtsInfo = function clearDtsInfo(track) {\n    delete track.minSegmentDts;\n    delete track.maxSegmentDts;\n    delete track.minSegmentPts;\n    delete track.maxSegmentPts;\n  };\n  /**\n   * Calculate the track's baseMediaDecodeTime based on the earliest\n   * DTS the transmuxer has ever seen and the minimum DTS for the\n   * current track\n   * @param track {object} track metadata configuration\n   * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {\n    var baseMediaDecodeTime,\n        scale,\n        minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n    if (!keepOriginalTimestamps) {\n      minSegmentDts -= track.timelineStartInfo.dts;\n    } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n    // we want the start of the first segment to be placed\n\n\n    baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n    baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n    baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n    if (track.type === 'audio') {\n      // Audio has a different clock equal to the sampling_rate so we need to\n      // scale the PTS values into the clock rate of the track\n      scale = track.samplerate / ONE_SECOND_IN_TS$3;\n      baseMediaDecodeTime *= scale;\n      baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n    }\n\n    return baseMediaDecodeTime;\n  };\n\n  var trackDecodeInfo = {\n    clearDtsInfo: clearDtsInfo,\n    calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n    collectDtsInfo: collectDtsInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Reads in-band caption information from a video elementary\n   * stream. Captions must follow the CEA-708 standard for injection\n   * into an MPEG-2 transport streams.\n   * @see https://en.wikipedia.org/wiki/CEA-708\n   * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n   */\n  // payload type field to indicate how they are to be\n  // interpreted. CEAS-708 caption content is always transmitted with\n  // payload type 0x04.\n\n  var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n      RBSP_TRAILING_BITS = 128;\n  /**\n    * Parse a supplemental enhancement information (SEI) NAL unit.\n    * Stops parsing once a message of type ITU T T35 has been found.\n    *\n    * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n    * @return {object} the parsed SEI payload\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n    */\n\n  var parseSei = function parseSei(bytes) {\n    var i = 0,\n        result = {\n      payloadType: -1,\n      payloadSize: 0\n    },\n        payloadType = 0,\n        payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n    while (i < bytes.byteLength) {\n      // stop once we have hit the end of the sei_rbsp\n      if (bytes[i] === RBSP_TRAILING_BITS) {\n        break;\n      } // Parse payload type\n\n\n      while (bytes[i] === 0xFF) {\n        payloadType += 255;\n        i++;\n      }\n\n      payloadType += bytes[i++]; // Parse payload size\n\n      while (bytes[i] === 0xFF) {\n        payloadSize += 255;\n        i++;\n      }\n\n      payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n      // there can only ever be one caption message in a frame's sei\n\n      if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n        var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);\n\n        if (userIdentifier === 'GA94') {\n          result.payloadType = payloadType;\n          result.payloadSize = payloadSize;\n          result.payload = bytes.subarray(i, i + payloadSize);\n          break;\n        } else {\n          result.payload = void 0;\n        }\n      } // skip the payload and parse the next message\n\n\n      i += payloadSize;\n      payloadType = 0;\n      payloadSize = 0;\n    }\n\n    return result;\n  }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\n  var parseUserData = function parseUserData(sei) {\n    // itu_t_t35_contry_code must be 181 (United States) for\n    // captions\n    if (sei.payload[0] !== 181) {\n      return null;\n    } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n    if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n      return null;\n    } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n    if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n      return null;\n    } // finally, user_data_type_code should be 0x03 for caption data\n\n\n    if (sei.payload[7] !== 0x03) {\n      return null;\n    } // return the user_data_type_structure and strip the trailing\n    // marker bits\n\n\n    return sei.payload.subarray(8, sei.payload.length - 1);\n  }; // see CEA-708-D, section 4.4\n\n\n  var parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n    var results = [],\n        i,\n        count,\n        offset,\n        data; // if this is just filler, return immediately\n\n    if (!(userData[0] & 0x40)) {\n      return results;\n    } // parse out the cc_data_1 and cc_data_2 fields\n\n\n    count = userData[0] & 0x1f;\n\n    for (i = 0; i < count; i++) {\n      offset = i * 3;\n      data = {\n        type: userData[offset + 2] & 0x03,\n        pts: pts\n      }; // capture cc data when cc_valid is 1\n\n      if (userData[offset + 2] & 0x04) {\n        data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n        results.push(data);\n      }\n    }\n\n    return results;\n  };\n\n  var discardEmulationPreventionBytes$1 = function discardEmulationPreventionBytes(data) {\n    var length = data.byteLength,\n        emulationPreventionBytesPositions = [],\n        i = 1,\n        newLength,\n        newData; // Find all `Emulation Prevention Bytes`\n\n    while (i < length - 2) {\n      if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n        emulationPreventionBytesPositions.push(i + 2);\n        i += 2;\n      } else {\n        i++;\n      }\n    } // If no Emulation Prevention Bytes were found just return the original\n    // array\n\n\n    if (emulationPreventionBytesPositions.length === 0) {\n      return data;\n    } // Create a new array to hold the NAL unit data\n\n\n    newLength = length - emulationPreventionBytesPositions.length;\n    newData = new Uint8Array(newLength);\n    var sourceIndex = 0;\n\n    for (i = 0; i < newLength; sourceIndex++, i++) {\n      if (sourceIndex === emulationPreventionBytesPositions[0]) {\n        // Skip this byte\n        sourceIndex++; // Remove this position index\n\n        emulationPreventionBytesPositions.shift();\n      }\n\n      newData[i] = data[sourceIndex];\n    }\n\n    return newData;\n  }; // exports\n\n\n  var captionPacketParser = {\n    parseSei: parseSei,\n    parseUserData: parseUserData,\n    parseCaptionPackets: parseCaptionPackets,\n    discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,\n    USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n  }; // Link To Transport\n  // -----------------\n\n  var CaptionStream$1 = function CaptionStream(options) {\n    options = options || {};\n    CaptionStream.prototype.init.call(this); // parse708captions flag, default to true\n\n    this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;\n    this.captionPackets_ = [];\n    this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n    ];\n\n    if (this.parse708captions_) {\n      this.cc708Stream_ = new Cea708Stream({\n        captionServices: options.captionServices\n      }); // eslint-disable-line no-use-before-define\n    }\n\n    this.reset(); // forward data and done events from CCs to this CaptionStream\n\n    this.ccStreams_.forEach(function (cc) {\n      cc.on('data', this.trigger.bind(this, 'data'));\n      cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      cc.on('done', this.trigger.bind(this, 'done'));\n    }, this);\n\n    if (this.parse708captions_) {\n      this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));\n      this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));\n    }\n  };\n\n  CaptionStream$1.prototype = new stream();\n\n  CaptionStream$1.prototype.push = function (event) {\n    var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n    if (event.nalUnitType !== 'sei_rbsp') {\n      return;\n    } // parse the sei\n\n\n    sei = captionPacketParser.parseSei(event.escapedRBSP); // no payload data, skip\n\n    if (!sei.payload) {\n      return;\n    } // ignore everything but user_data_registered_itu_t_t35\n\n\n    if (sei.payloadType !== captionPacketParser.USER_DATA_REGISTERED_ITU_T_T35) {\n      return;\n    } // parse out the user data payload\n\n\n    userData = captionPacketParser.parseUserData(sei); // ignore unrecognized userData\n\n    if (!userData) {\n      return;\n    } // Sometimes, the same segment # will be downloaded twice. To stop the\n    // caption data from being processed twice, we track the latest dts we've\n    // received and ignore everything with a dts before that. However, since\n    // data for a specific dts can be split across packets on either side of\n    // a segment boundary, we need to make sure we *don't* ignore the packets\n    // from the *next* segment that have dts === this.latestDts_. By constantly\n    // tracking the number of packets received with dts === this.latestDts_, we\n    // know how many should be ignored once we start receiving duplicates.\n\n\n    if (event.dts < this.latestDts_) {\n      // We've started getting older data, so set the flag.\n      this.ignoreNextEqualDts_ = true;\n      return;\n    } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n      this.numSameDts_--;\n\n      if (!this.numSameDts_) {\n        // We've received the last duplicate packet, time to start processing again\n        this.ignoreNextEqualDts_ = false;\n      }\n\n      return;\n    } // parse out CC data packets and save them for later\n\n\n    newCaptionPackets = captionPacketParser.parseCaptionPackets(event.pts, userData);\n    this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n    if (this.latestDts_ !== event.dts) {\n      this.numSameDts_ = 0;\n    }\n\n    this.numSameDts_++;\n    this.latestDts_ = event.dts;\n  };\n\n  CaptionStream$1.prototype.flushCCStreams = function (flushType) {\n    this.ccStreams_.forEach(function (cc) {\n      return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n    }, this);\n  };\n\n  CaptionStream$1.prototype.flushStream = function (flushType) {\n    // make sure we actually parsed captions before proceeding\n    if (!this.captionPackets_.length) {\n      this.flushCCStreams(flushType);\n      return;\n    } // In Chrome, the Array#sort function is not stable so add a\n    // presortIndex that we can use to ensure we get a stable-sort\n\n\n    this.captionPackets_.forEach(function (elem, idx) {\n      elem.presortIndex = idx;\n    }); // sort caption byte-pairs based on their PTS values\n\n    this.captionPackets_.sort(function (a, b) {\n      if (a.pts === b.pts) {\n        return a.presortIndex - b.presortIndex;\n      }\n\n      return a.pts - b.pts;\n    });\n    this.captionPackets_.forEach(function (packet) {\n      if (packet.type < 2) {\n        // Dispatch packet to the right Cea608Stream\n        this.dispatchCea608Packet(packet);\n      } else {\n        // Dispatch packet to the Cea708Stream\n        this.dispatchCea708Packet(packet);\n      }\n    }, this);\n    this.captionPackets_.length = 0;\n    this.flushCCStreams(flushType);\n  };\n\n  CaptionStream$1.prototype.flush = function () {\n    return this.flushStream('flush');\n  }; // Only called if handling partial data\n\n\n  CaptionStream$1.prototype.partialFlush = function () {\n    return this.flushStream('partialFlush');\n  };\n\n  CaptionStream$1.prototype.reset = function () {\n    this.latestDts_ = null;\n    this.ignoreNextEqualDts_ = false;\n    this.numSameDts_ = 0;\n    this.activeCea608Channel_ = [null, null];\n    this.ccStreams_.forEach(function (ccStream) {\n      ccStream.reset();\n    });\n  }; // From the CEA-608 spec:\n\n  /*\n   * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n   * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n   * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n   * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n   * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n   * to switch to captioning or Text.\n  */\n  // With that in mind, we ignore any data between an XDS control code and a\n  // subsequent closed-captioning control code.\n\n\n  CaptionStream$1.prototype.dispatchCea608Packet = function (packet) {\n    // NOTE: packet.type is the CEA608 field\n    if (this.setsTextOrXDSActive(packet)) {\n      this.activeCea608Channel_[packet.type] = null;\n    } else if (this.setsChannel1Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 0;\n    } else if (this.setsChannel2Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 1;\n    }\n\n    if (this.activeCea608Channel_[packet.type] === null) {\n      // If we haven't received anything to set the active channel, or the\n      // packets are Text/XDS data, discard the data; we don't want jumbled\n      // captions\n      return;\n    }\n\n    this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n  };\n\n  CaptionStream$1.prototype.setsChannel1Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1000;\n  };\n\n  CaptionStream$1.prototype.setsChannel2Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1800;\n  };\n\n  CaptionStream$1.prototype.setsTextOrXDSActive = function (packet) {\n    return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n  };\n\n  CaptionStream$1.prototype.dispatchCea708Packet = function (packet) {\n    if (this.parse708captions_) {\n      this.cc708Stream_.push(packet);\n    }\n  }; // ----------------------\n  // Session to Application\n  // ----------------------\n  // This hash maps special and extended character codes to their\n  // proper Unicode equivalent. The first one-byte key is just a\n  // non-standard character code. The two-byte keys that follow are\n  // the extended CEA708 character codes, along with the preceding\n  // 0x10 extended character byte to distinguish these codes from\n  // non-extended character codes. Every CEA708 character code that\n  // is not in this object maps directly to a standard unicode\n  // character code.\n  // The transparent space and non-breaking transparent space are\n  // technically not fully supported since there is no code to\n  // make them transparent, so they have normal non-transparent\n  // stand-ins.\n  // The special closed caption (CC) character isn't a standard\n  // unicode character, so a fairly similar unicode character was\n  // chosen in it's place.\n\n\n  var CHARACTER_TRANSLATION_708 = {\n    0x7f: 0x266a,\n    // ♪\n    0x1020: 0x20,\n    // Transparent Space\n    0x1021: 0xa0,\n    // Nob-breaking Transparent Space\n    0x1025: 0x2026,\n    // …\n    0x102a: 0x0160,\n    // Š\n    0x102c: 0x0152,\n    // Œ\n    0x1030: 0x2588,\n    // █\n    0x1031: 0x2018,\n    // ‘\n    0x1032: 0x2019,\n    // ’\n    0x1033: 0x201c,\n    // “\n    0x1034: 0x201d,\n    // ”\n    0x1035: 0x2022,\n    // •\n    0x1039: 0x2122,\n    // ™\n    0x103a: 0x0161,\n    // š\n    0x103c: 0x0153,\n    // œ\n    0x103d: 0x2120,\n    // ℠\n    0x103f: 0x0178,\n    // Ÿ\n    0x1076: 0x215b,\n    // ⅛\n    0x1077: 0x215c,\n    // ⅜\n    0x1078: 0x215d,\n    // ⅝\n    0x1079: 0x215e,\n    // ⅞\n    0x107a: 0x23d0,\n    // ⏐\n    0x107b: 0x23a4,\n    // ⎤\n    0x107c: 0x23a3,\n    // ⎣\n    0x107d: 0x23af,\n    // ⎯\n    0x107e: 0x23a6,\n    // ⎦\n    0x107f: 0x23a1,\n    // ⎡\n    0x10a0: 0x3138 // ㄸ (CC char)\n\n  };\n\n  var get708CharFromCode = function get708CharFromCode(code) {\n    var newCode = CHARACTER_TRANSLATION_708[code] || code;\n\n    if (code & 0x1000 && code === newCode) {\n      // Invalid extended code\n      return '';\n    }\n\n    return String.fromCharCode(newCode);\n  };\n\n  var within708TextBlock = function within708TextBlock(b) {\n    return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;\n  };\n\n  var Cea708Window = function Cea708Window(windowNum) {\n    this.windowNum = windowNum;\n    this.reset();\n  };\n\n  Cea708Window.prototype.reset = function () {\n    this.clearText();\n    this.pendingNewLine = false;\n    this.winAttr = {};\n    this.penAttr = {};\n    this.penLoc = {};\n    this.penColor = {}; // These default values are arbitrary,\n    // defineWindow will usually override them\n\n    this.visible = 0;\n    this.rowLock = 0;\n    this.columnLock = 0;\n    this.priority = 0;\n    this.relativePositioning = 0;\n    this.anchorVertical = 0;\n    this.anchorHorizontal = 0;\n    this.anchorPoint = 0;\n    this.rowCount = 1;\n    this.virtualRowCount = this.rowCount + 1;\n    this.columnCount = 41;\n    this.windowStyle = 0;\n    this.penStyle = 0;\n  };\n\n  Cea708Window.prototype.getText = function () {\n    return this.rows.join('\\n');\n  };\n\n  Cea708Window.prototype.clearText = function () {\n    this.rows = [''];\n    this.rowIdx = 0;\n  };\n\n  Cea708Window.prototype.newLine = function (pts) {\n    if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {\n      this.beforeRowOverflow(pts);\n    }\n\n    if (this.rows.length > 0) {\n      this.rows.push('');\n      this.rowIdx++;\n    } // Show all virtual rows since there's no visible scrolling\n\n\n    while (this.rows.length > this.virtualRowCount) {\n      this.rows.shift();\n      this.rowIdx--;\n    }\n  };\n\n  Cea708Window.prototype.isEmpty = function () {\n    if (this.rows.length === 0) {\n      return true;\n    } else if (this.rows.length === 1) {\n      return this.rows[0] === '';\n    }\n\n    return false;\n  };\n\n  Cea708Window.prototype.addText = function (text) {\n    this.rows[this.rowIdx] += text;\n  };\n\n  Cea708Window.prototype.backspace = function () {\n    if (!this.isEmpty()) {\n      var row = this.rows[this.rowIdx];\n      this.rows[this.rowIdx] = row.substr(0, row.length - 1);\n    }\n  };\n\n  var Cea708Service = function Cea708Service(serviceNum, encoding, stream) {\n    this.serviceNum = serviceNum;\n    this.text = '';\n    this.currentWindow = new Cea708Window(-1);\n    this.windows = [];\n    this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided\n\n    if (typeof encoding === 'string') {\n      this.createTextDecoder(encoding);\n    }\n  };\n  /**\n   * Initialize service windows\n   * Must be run before service use\n   *\n   * @param  {Integer}  pts               PTS value\n   * @param  {Function} beforeRowOverflow Function to execute before row overflow of a window\n   */\n\n\n  Cea708Service.prototype.init = function (pts, beforeRowOverflow) {\n    this.startPts = pts;\n\n    for (var win = 0; win < 8; win++) {\n      this.windows[win] = new Cea708Window(win);\n\n      if (typeof beforeRowOverflow === 'function') {\n        this.windows[win].beforeRowOverflow = beforeRowOverflow;\n      }\n    }\n  };\n  /**\n   * Set current window of service to be affected by commands\n   *\n   * @param  {Integer} windowNum Window number\n   */\n\n\n  Cea708Service.prototype.setCurrentWindow = function (windowNum) {\n    this.currentWindow = this.windows[windowNum];\n  };\n  /**\n   * Try to create a TextDecoder if it is natively supported\n   */\n\n\n  Cea708Service.prototype.createTextDecoder = function (encoding) {\n    if (typeof TextDecoder === 'undefined') {\n      this.stream.trigger('log', {\n        level: 'warn',\n        message: 'The `encoding` option is unsupported without TextDecoder support'\n      });\n    } else {\n      try {\n        this.textDecoder_ = new TextDecoder(encoding);\n      } catch (error) {\n        this.stream.trigger('log', {\n          level: 'warn',\n          message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error\n        });\n      }\n    }\n  };\n\n  var Cea708Stream = function Cea708Stream(options) {\n    options = options || {};\n    Cea708Stream.prototype.init.call(this);\n    var self = this;\n    var captionServices = options.captionServices || {};\n    var captionServiceEncodings = {};\n    var serviceProps; // Get service encodings from captionServices option block\n\n    Object.keys(captionServices).forEach(function (serviceName) {\n      serviceProps = captionServices[serviceName];\n\n      if (/^SERVICE/.test(serviceName)) {\n        captionServiceEncodings[serviceName] = serviceProps.encoding;\n      }\n    });\n    this.serviceEncodings = captionServiceEncodings;\n    this.current708Packet = null;\n    this.services = {};\n\n    this.push = function (packet) {\n      if (packet.type === 3) {\n        // 708 packet start\n        self.new708Packet();\n        self.add708Bytes(packet);\n      } else {\n        if (self.current708Packet === null) {\n          // This should only happen at the start of a file if there's no packet start.\n          self.new708Packet();\n        }\n\n        self.add708Bytes(packet);\n      }\n    };\n  };\n\n  Cea708Stream.prototype = new stream();\n  /**\n   * Push current 708 packet, create new 708 packet.\n   */\n\n  Cea708Stream.prototype.new708Packet = function () {\n    if (this.current708Packet !== null) {\n      this.push708Packet();\n    }\n\n    this.current708Packet = {\n      data: [],\n      ptsVals: []\n    };\n  };\n  /**\n   * Add pts and both bytes from packet into current 708 packet.\n   */\n\n\n  Cea708Stream.prototype.add708Bytes = function (packet) {\n    var data = packet.ccData;\n    var byte0 = data >>> 8;\n    var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec\n    // that service blocks will always line up with byte pairs.\n\n    this.current708Packet.ptsVals.push(packet.pts);\n    this.current708Packet.data.push(byte0);\n    this.current708Packet.data.push(byte1);\n  };\n  /**\n   * Parse completed 708 packet into service blocks and push each service block.\n   */\n\n\n  Cea708Stream.prototype.push708Packet = function () {\n    var packet708 = this.current708Packet;\n    var packetData = packet708.data;\n    var serviceNum = null;\n    var blockSize = null;\n    var i = 0;\n    var b = packetData[i++];\n    packet708.seq = b >> 6;\n    packet708.sizeCode = b & 0x3f; // 0b00111111;\n\n    for (; i < packetData.length; i++) {\n      b = packetData[i++];\n      serviceNum = b >> 5;\n      blockSize = b & 0x1f; // 0b00011111\n\n      if (serviceNum === 7 && blockSize > 0) {\n        // Extended service num\n        b = packetData[i++];\n        serviceNum = b;\n      }\n\n      this.pushServiceBlock(serviceNum, i, blockSize);\n\n      if (blockSize > 0) {\n        i += blockSize - 1;\n      }\n    }\n  };\n  /**\n   * Parse service block, execute commands, read text.\n   *\n   * Note: While many of these commands serve important purposes,\n   * many others just parse out the parameters or attributes, but\n   * nothing is done with them because this is not a full and complete\n   * implementation of the entire 708 spec.\n   *\n   * @param  {Integer} serviceNum Service number\n   * @param  {Integer} start      Start index of the 708 packet data\n   * @param  {Integer} size       Block size\n   */\n\n\n  Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {\n    var b;\n    var i = start;\n    var packetData = this.current708Packet.data;\n    var service = this.services[serviceNum];\n\n    if (!service) {\n      service = this.initService(serviceNum, i);\n    }\n\n    for (; i < start + size && i < packetData.length; i++) {\n      b = packetData[i];\n\n      if (within708TextBlock(b)) {\n        i = this.handleText(i, service);\n      } else if (b === 0x18) {\n        i = this.multiByteCharacter(i, service);\n      } else if (b === 0x10) {\n        i = this.extendedCommands(i, service);\n      } else if (0x80 <= b && b <= 0x87) {\n        i = this.setCurrentWindow(i, service);\n      } else if (0x98 <= b && b <= 0x9f) {\n        i = this.defineWindow(i, service);\n      } else if (b === 0x88) {\n        i = this.clearWindows(i, service);\n      } else if (b === 0x8c) {\n        i = this.deleteWindows(i, service);\n      } else if (b === 0x89) {\n        i = this.displayWindows(i, service);\n      } else if (b === 0x8a) {\n        i = this.hideWindows(i, service);\n      } else if (b === 0x8b) {\n        i = this.toggleWindows(i, service);\n      } else if (b === 0x97) {\n        i = this.setWindowAttributes(i, service);\n      } else if (b === 0x90) {\n        i = this.setPenAttributes(i, service);\n      } else if (b === 0x91) {\n        i = this.setPenColor(i, service);\n      } else if (b === 0x92) {\n        i = this.setPenLocation(i, service);\n      } else if (b === 0x8f) {\n        service = this.reset(i, service);\n      } else if (b === 0x08) {\n        // BS: Backspace\n        service.currentWindow.backspace();\n      } else if (b === 0x0c) {\n        // FF: Form feed\n        service.currentWindow.clearText();\n      } else if (b === 0x0d) {\n        // CR: Carriage return\n        service.currentWindow.pendingNewLine = true;\n      } else if (b === 0x0e) {\n        // HCR: Horizontal carriage return\n        service.currentWindow.clearText();\n      } else if (b === 0x8d) {\n        // DLY: Delay, nothing to do\n        i++;\n      } else ;\n    }\n  };\n  /**\n   * Execute an extended command\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.extendedCommands = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n\n    if (within708TextBlock(b)) {\n      i = this.handleText(i, service, {\n        isExtended: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Get PTS value of a given byte index\n   *\n   * @param  {Integer} byteIndex  Index of the byte\n   * @return {Integer}            PTS\n   */\n\n\n  Cea708Stream.prototype.getPts = function (byteIndex) {\n    // There's 1 pts value per 2 bytes\n    return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];\n  };\n  /**\n   * Initializes a service\n   *\n   * @param  {Integer} serviceNum Service number\n   * @return {Service}            Initialized service object\n   */\n\n\n  Cea708Stream.prototype.initService = function (serviceNum, i) {\n    var serviceName = 'SERVICE' + serviceNum;\n    var self = this;\n    var serviceName;\n    var encoding;\n\n    if (serviceName in this.serviceEncodings) {\n      encoding = this.serviceEncodings[serviceName];\n    }\n\n    this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);\n    this.services[serviceNum].init(this.getPts(i), function (pts) {\n      self.flushDisplayed(pts, self.services[serviceNum]);\n    });\n    return this.services[serviceNum];\n  };\n  /**\n   * Execute text writing to current window\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.handleText = function (i, service, options) {\n    var isExtended = options && options.isExtended;\n    var isMultiByte = options && options.isMultiByte;\n    var packetData = this.current708Packet.data;\n    var extended = isExtended ? 0x1000 : 0x0000;\n    var currentByte = packetData[i];\n    var nextByte = packetData[i + 1];\n    var win = service.currentWindow;\n\n    var _char;\n\n    var charCodeArray; // Use the TextDecoder if one was created for this service\n\n    if (service.textDecoder_ && !isExtended) {\n      if (isMultiByte) {\n        charCodeArray = [currentByte, nextByte];\n        i++;\n      } else {\n        charCodeArray = [currentByte];\n      }\n\n      _char = service.textDecoder_.decode(new Uint8Array(charCodeArray));\n    } else {\n      _char = get708CharFromCode(extended | currentByte);\n    }\n\n    if (win.pendingNewLine && !win.isEmpty()) {\n      win.newLine(this.getPts(i));\n    }\n\n    win.pendingNewLine = false;\n    win.addText(_char);\n    return i;\n  };\n  /**\n   * Handle decoding of multibyte character\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.multiByteCharacter = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var firstByte = packetData[i + 1];\n    var secondByte = packetData[i + 2];\n\n    if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {\n      i = this.handleText(++i, service, {\n        isMultiByte: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CW# command.\n   *\n   * Set the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setCurrentWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    return i;\n  };\n  /**\n   * Parse and execute the DF# command.\n   *\n   * Define a window and set it as the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.defineWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    var win = service.currentWindow;\n    b = packetData[++i];\n    win.visible = (b & 0x20) >> 5; // v\n\n    win.rowLock = (b & 0x10) >> 4; // rl\n\n    win.columnLock = (b & 0x08) >> 3; // cl\n\n    win.priority = b & 0x07; // p\n\n    b = packetData[++i];\n    win.relativePositioning = (b & 0x80) >> 7; // rp\n\n    win.anchorVertical = b & 0x7f; // av\n\n    b = packetData[++i];\n    win.anchorHorizontal = b; // ah\n\n    b = packetData[++i];\n    win.anchorPoint = (b & 0xf0) >> 4; // ap\n\n    win.rowCount = b & 0x0f; // rc\n\n    b = packetData[++i];\n    win.columnCount = b & 0x3f; // cc\n\n    b = packetData[++i];\n    win.windowStyle = (b & 0x38) >> 3; // ws\n\n    win.penStyle = b & 0x07; // ps\n    // The spec says there are (rowCount+1) \"virtual rows\"\n\n    win.virtualRowCount = win.rowCount + 1;\n    return i;\n  };\n  /**\n   * Parse and execute the SWA command.\n   *\n   * Set attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setWindowAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var winAttr = service.currentWindow.winAttr;\n    b = packetData[++i];\n    winAttr.fillOpacity = (b & 0xc0) >> 6; // fo\n\n    winAttr.fillRed = (b & 0x30) >> 4; // fr\n\n    winAttr.fillGreen = (b & 0x0c) >> 2; // fg\n\n    winAttr.fillBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    winAttr.borderType = (b & 0xc0) >> 6; // bt\n\n    winAttr.borderRed = (b & 0x30) >> 4; // br\n\n    winAttr.borderGreen = (b & 0x0c) >> 2; // bg\n\n    winAttr.borderBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    winAttr.borderType += (b & 0x80) >> 5; // bt\n\n    winAttr.wordWrap = (b & 0x40) >> 6; // ww\n\n    winAttr.printDirection = (b & 0x30) >> 4; // pd\n\n    winAttr.scrollDirection = (b & 0x0c) >> 2; // sd\n\n    winAttr.justify = b & 0x03; // j\n\n    b = packetData[++i];\n    winAttr.effectSpeed = (b & 0xf0) >> 4; // es\n\n    winAttr.effectDirection = (b & 0x0c) >> 2; // ed\n\n    winAttr.displayEffect = b & 0x03; // de\n\n    return i;\n  };\n  /**\n   * Gather text from all displayed windows and push a caption to output.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.flushDisplayed = function (pts, service) {\n    var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily\n    // display text in the correct order, but sample files so far have not shown any issue.\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {\n        displayedText.push(service.windows[winId].getText());\n      }\n    }\n\n    service.endPts = pts;\n    service.text = displayedText.join('\\n\\n');\n    this.pushCaption(service);\n    service.startPts = pts;\n  };\n  /**\n   * Push a caption to output if the caption contains text.\n   *\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.pushCaption = function (service) {\n    if (service.text !== '') {\n      this.trigger('data', {\n        startPts: service.startPts,\n        endPts: service.endPts,\n        text: service.text,\n        stream: 'cc708_' + service.serviceNum\n      });\n      service.text = '';\n      service.startPts = service.endPts;\n    }\n  };\n  /**\n   * Parse and execute the DSW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.displayWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the HDW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.hideWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 0;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the TGW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.toggleWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible ^= 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CLW command.\n   *\n   * Clear text of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.clearWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].clearText();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the DLW command.\n   *\n   * Re-initialize windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.deleteWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].reset();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPA command.\n   *\n   * Set pen attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penAttr = service.currentWindow.penAttr;\n    b = packetData[++i];\n    penAttr.textTag = (b & 0xf0) >> 4; // tt\n\n    penAttr.offset = (b & 0x0c) >> 2; // o\n\n    penAttr.penSize = b & 0x03; // s\n\n    b = packetData[++i];\n    penAttr.italics = (b & 0x80) >> 7; // i\n\n    penAttr.underline = (b & 0x40) >> 6; // u\n\n    penAttr.edgeType = (b & 0x38) >> 3; // et\n\n    penAttr.fontStyle = b & 0x07; // fs\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPC command.\n   *\n   * Set pen color of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenColor = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penColor = service.currentWindow.penColor;\n    b = packetData[++i];\n    penColor.fgOpacity = (b & 0xc0) >> 6; // fo\n\n    penColor.fgRed = (b & 0x30) >> 4; // fr\n\n    penColor.fgGreen = (b & 0x0c) >> 2; // fg\n\n    penColor.fgBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    penColor.bgOpacity = (b & 0xc0) >> 6; // bo\n\n    penColor.bgRed = (b & 0x30) >> 4; // br\n\n    penColor.bgGreen = (b & 0x0c) >> 2; // bg\n\n    penColor.bgBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    penColor.edgeRed = (b & 0x30) >> 4; // er\n\n    penColor.edgeGreen = (b & 0x0c) >> 2; // eg\n\n    penColor.edgeBlue = b & 0x03; // eb\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPL command.\n   *\n   * Set pen location of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenLocation = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak\n\n    service.currentWindow.pendingNewLine = true;\n    b = packetData[++i];\n    penLoc.row = b & 0x0f; // r\n\n    b = packetData[++i];\n    penLoc.column = b & 0x3f; // c\n\n    return i;\n  };\n  /**\n   * Execute the RST command.\n   *\n   * Reset service to a clean slate. Re-initialize.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Service}          Re-initialized service\n   */\n\n\n  Cea708Stream.prototype.reset = function (i, service) {\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n    return this.initService(service.serviceNum, i);\n  }; // This hash maps non-ASCII, special, and extended character codes to their\n  // proper Unicode equivalent. The first keys that are only a single byte\n  // are the non-standard ASCII characters, which simply map the CEA608 byte\n  // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n  // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n  // can be performed regardless of the field and data channel on which the\n  // character code was received.\n\n\n  var CHARACTER_TRANSLATION = {\n    0x2a: 0xe1,\n    // á\n    0x5c: 0xe9,\n    // é\n    0x5e: 0xed,\n    // í\n    0x5f: 0xf3,\n    // ó\n    0x60: 0xfa,\n    // ú\n    0x7b: 0xe7,\n    // ç\n    0x7c: 0xf7,\n    // ÷\n    0x7d: 0xd1,\n    // Ñ\n    0x7e: 0xf1,\n    // ñ\n    0x7f: 0x2588,\n    // █\n    0x0130: 0xae,\n    // ®\n    0x0131: 0xb0,\n    // °\n    0x0132: 0xbd,\n    // ½\n    0x0133: 0xbf,\n    // ¿\n    0x0134: 0x2122,\n    // ™\n    0x0135: 0xa2,\n    // ¢\n    0x0136: 0xa3,\n    // £\n    0x0137: 0x266a,\n    // ♪\n    0x0138: 0xe0,\n    // à\n    0x0139: 0xa0,\n    //\n    0x013a: 0xe8,\n    // è\n    0x013b: 0xe2,\n    // â\n    0x013c: 0xea,\n    // ê\n    0x013d: 0xee,\n    // î\n    0x013e: 0xf4,\n    // ô\n    0x013f: 0xfb,\n    // û\n    0x0220: 0xc1,\n    // Á\n    0x0221: 0xc9,\n    // É\n    0x0222: 0xd3,\n    // Ó\n    0x0223: 0xda,\n    // Ú\n    0x0224: 0xdc,\n    // Ü\n    0x0225: 0xfc,\n    // ü\n    0x0226: 0x2018,\n    // ‘\n    0x0227: 0xa1,\n    // ¡\n    0x0228: 0x2a,\n    // *\n    0x0229: 0x27,\n    // '\n    0x022a: 0x2014,\n    // —\n    0x022b: 0xa9,\n    // ©\n    0x022c: 0x2120,\n    // ℠\n    0x022d: 0x2022,\n    // •\n    0x022e: 0x201c,\n    // “\n    0x022f: 0x201d,\n    // ”\n    0x0230: 0xc0,\n    // À\n    0x0231: 0xc2,\n    // Â\n    0x0232: 0xc7,\n    // Ç\n    0x0233: 0xc8,\n    // È\n    0x0234: 0xca,\n    // Ê\n    0x0235: 0xcb,\n    // Ë\n    0x0236: 0xeb,\n    // ë\n    0x0237: 0xce,\n    // Î\n    0x0238: 0xcf,\n    // Ï\n    0x0239: 0xef,\n    // ï\n    0x023a: 0xd4,\n    // Ô\n    0x023b: 0xd9,\n    // Ù\n    0x023c: 0xf9,\n    // ù\n    0x023d: 0xdb,\n    // Û\n    0x023e: 0xab,\n    // «\n    0x023f: 0xbb,\n    // »\n    0x0320: 0xc3,\n    // Ã\n    0x0321: 0xe3,\n    // ã\n    0x0322: 0xcd,\n    // Í\n    0x0323: 0xcc,\n    // Ì\n    0x0324: 0xec,\n    // ì\n    0x0325: 0xd2,\n    // Ò\n    0x0326: 0xf2,\n    // ò\n    0x0327: 0xd5,\n    // Õ\n    0x0328: 0xf5,\n    // õ\n    0x0329: 0x7b,\n    // {\n    0x032a: 0x7d,\n    // }\n    0x032b: 0x5c,\n    // \\\n    0x032c: 0x5e,\n    // ^\n    0x032d: 0x5f,\n    // _\n    0x032e: 0x7c,\n    // |\n    0x032f: 0x7e,\n    // ~\n    0x0330: 0xc4,\n    // Ä\n    0x0331: 0xe4,\n    // ä\n    0x0332: 0xd6,\n    // Ö\n    0x0333: 0xf6,\n    // ö\n    0x0334: 0xdf,\n    // ß\n    0x0335: 0xa5,\n    // ¥\n    0x0336: 0xa4,\n    // ¤\n    0x0337: 0x2502,\n    // │\n    0x0338: 0xc5,\n    // Å\n    0x0339: 0xe5,\n    // å\n    0x033a: 0xd8,\n    // Ø\n    0x033b: 0xf8,\n    // ø\n    0x033c: 0x250c,\n    // ┌\n    0x033d: 0x2510,\n    // ┐\n    0x033e: 0x2514,\n    // └\n    0x033f: 0x2518 // ┘\n\n  };\n\n  var getCharFromCode = function getCharFromCode(code) {\n    if (code === null) {\n      return '';\n    }\n\n    code = CHARACTER_TRANSLATION[code] || code;\n    return String.fromCharCode(code);\n  }; // the index of the last row in a CEA-608 display buffer\n\n\n  var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n  // getting it through bit logic.\n\n  var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n  // cells. The \"bottom\" row is the last element in the outer array.\n\n  var createDisplayBuffer = function createDisplayBuffer() {\n    var result = [],\n        i = BOTTOM_ROW + 1;\n\n    while (i--) {\n      result.push('');\n    }\n\n    return result;\n  };\n\n  var Cea608Stream = function Cea608Stream(field, dataChannel) {\n    Cea608Stream.prototype.init.call(this);\n    this.field_ = field || 0;\n    this.dataChannel_ = dataChannel || 0;\n    this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n    this.setConstants();\n    this.reset();\n\n    this.push = function (packet) {\n      var data, swap, char0, char1, text; // remove the parity bits\n\n      data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n      if (data === this.lastControlCode_) {\n        this.lastControlCode_ = null;\n        return;\n      } // Store control codes\n\n\n      if ((data & 0xf000) === 0x1000) {\n        this.lastControlCode_ = data;\n      } else if (data !== this.PADDING_) {\n        this.lastControlCode_ = null;\n      }\n\n      char0 = data >>> 8;\n      char1 = data & 0xff;\n\n      if (data === this.PADDING_) {\n        return;\n      } else if (data === this.RESUME_CAPTION_LOADING_) {\n        this.mode_ = 'popOn';\n      } else if (data === this.END_OF_CAPTION_) {\n        // If an EOC is received while in paint-on mode, the displayed caption\n        // text should be swapped to non-displayed memory as if it was a pop-on\n        // caption. Because of that, we should explicitly switch back to pop-on\n        // mode\n        this.mode_ = 'popOn';\n        this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n        this.flushDisplayed(packet.pts); // flip memory\n\n        swap = this.displayed_;\n        this.displayed_ = this.nonDisplayed_;\n        this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n        this.startPts_ = packet.pts;\n      } else if (data === this.ROLL_UP_2_ROWS_) {\n        this.rollUpRows_ = 2;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_3_ROWS_) {\n        this.rollUpRows_ = 3;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_4_ROWS_) {\n        this.rollUpRows_ = 4;\n        this.setRollUp(packet.pts);\n      } else if (data === this.CARRIAGE_RETURN_) {\n        this.clearFormatting(packet.pts);\n        this.flushDisplayed(packet.pts);\n        this.shiftRowsUp_();\n        this.startPts_ = packet.pts;\n      } else if (data === this.BACKSPACE_) {\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        }\n      } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n        this.flushDisplayed(packet.pts);\n        this.displayed_ = createDisplayBuffer();\n      } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n        this.nonDisplayed_ = createDisplayBuffer();\n      } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n        if (this.mode_ !== 'paintOn') {\n          // NOTE: This should be removed when proper caption positioning is\n          // implemented\n          this.flushDisplayed(packet.pts);\n          this.displayed_ = createDisplayBuffer();\n        }\n\n        this.mode_ = 'paintOn';\n        this.startPts_ = packet.pts; // Append special characters to caption text\n      } else if (this.isSpecialCharacter(char0, char1)) {\n        // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Append extended characters to caption text\n      } else if (this.isExtCharacter(char0, char1)) {\n        // Extended characters always follow their \"non-extended\" equivalents.\n        // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n        // decoders are supposed to drop the \"è\", while compliant decoders\n        // backspace the \"e\" and insert \"è\".\n        // Delete the previous character\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        } // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n\n\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Process mid-row codes\n      } else if (this.isMidRowCode(char0, char1)) {\n        // Attributes are not additive, so clear all formatting\n        this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n        // should be replaced with spaces, so add one now\n\n        this[this.mode_](packet.pts, ' ');\n        this.column_++;\n\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n\n        if ((char1 & 0x1) === 0x1) {\n          this.addFormatting(packet.pts, ['u']);\n        } // Detect offset control codes and adjust cursor\n\n      } else if (this.isOffsetControlCode(char0, char1)) {\n        // Cursor position is set by indent PAC (see below) in 4-column\n        // increments, with an additional offset code of 1-3 to reach any\n        // of the 32 columns specified by CEA-608. So all we need to do\n        // here is increment the column cursor by the given offset.\n        this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n      } else if (this.isPAC(char0, char1)) {\n        // There's no logic for PAC -> row mapping, so we have to just\n        // find the row code in an array and use its index :(\n        var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n        if (this.mode_ === 'rollUp') {\n          // This implies that the base row is incorrectly set.\n          // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n          // of roll-up rows set.\n          if (row - this.rollUpRows_ + 1 < 0) {\n            row = this.rollUpRows_ - 1;\n          }\n\n          this.setRollUp(packet.pts, row);\n        }\n\n        if (row !== this.row_) {\n          // formatting is only persistent for current row\n          this.clearFormatting(packet.pts);\n          this.row_ = row;\n        } // All PACs can apply underline, so detect and apply\n        // (All odd-numbered second bytes set underline)\n\n\n        if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n          this.addFormatting(packet.pts, ['u']);\n        }\n\n        if ((data & 0x10) === 0x10) {\n          // We've got an indent level code. Each successive even number\n          // increments the column cursor by 4, so we can get the desired\n          // column position by bit-shifting to the right (to get n/2)\n          // and multiplying by 4.\n          this.column_ = ((data & 0xe) >> 1) * 4;\n        }\n\n        if (this.isColorPAC(char1)) {\n          // it's a color code, though we only support white, which\n          // can be either normal or italicized. white italics can be\n          // either 0x4e or 0x6e depending on the row, so we just\n          // bitwise-and with 0xe to see if italics should be turned on\n          if ((char1 & 0xe) === 0xe) {\n            this.addFormatting(packet.pts, ['i']);\n          }\n        } // We have a normal character in char0, and possibly one in char1\n\n      } else if (this.isNormalChar(char0)) {\n        if (char1 === 0x00) {\n          char1 = null;\n        }\n\n        text = getCharFromCode(char0);\n        text += getCharFromCode(char1);\n        this[this.mode_](packet.pts, text);\n        this.column_ += text.length;\n      } // finish data processing\n\n    };\n  };\n\n  Cea608Stream.prototype = new stream(); // Trigger a cue point that captures the current state of the\n  // display buffer\n\n  Cea608Stream.prototype.flushDisplayed = function (pts) {\n    var content = this.displayed_ // remove spaces from the start and end of the string\n    .map(function (row, index) {\n      try {\n        return row.trim();\n      } catch (e) {\n        // Ordinarily, this shouldn't happen. However, caption\n        // parsing errors should not throw exceptions and\n        // break playback.\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping a malformed 608 caption at index ' + index + '.'\n        });\n        return '';\n      }\n    }, this) // combine all text rows to display in one cue\n    .join('\\n') // and remove blank rows from the start and end, but not the middle\n    .replace(/^\\n+|\\n+$/g, '');\n\n    if (content.length) {\n      this.trigger('data', {\n        startPts: this.startPts_,\n        endPts: pts,\n        text: content,\n        stream: this.name_\n      });\n    }\n  };\n  /**\n   * Zero out the data, used for startup and on seek\n   */\n\n\n  Cea608Stream.prototype.reset = function () {\n    this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n    // actually display captions. If a caption is shifted to a row\n    // with a lower index than this, it is cleared from the display\n    // buffer\n\n    this.topRow_ = 0;\n    this.startPts_ = 0;\n    this.displayed_ = createDisplayBuffer();\n    this.nonDisplayed_ = createDisplayBuffer();\n    this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n    this.column_ = 0;\n    this.row_ = BOTTOM_ROW;\n    this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n    this.formatting_ = [];\n  };\n  /**\n   * Sets up control code and related constants for this instance\n   */\n\n\n  Cea608Stream.prototype.setConstants = function () {\n    // The following attributes have these uses:\n    // ext_ :    char0 for mid-row codes, and the base for extended\n    //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n    //           extended codes)\n    // control_: char0 for control codes, except byte-shifted to the\n    //           left so that we can do this.control_ | CONTROL_CODE\n    // offset_:  char0 for tab offset codes\n    //\n    // It's also worth noting that control codes, and _only_ control codes,\n    // differ between field 1 and field2. Field 2 control codes are always\n    // their field 1 value plus 1. That's why there's the \"| field\" on the\n    // control value.\n    if (this.dataChannel_ === 0) {\n      this.BASE_ = 0x10;\n      this.EXT_ = 0x11;\n      this.CONTROL_ = (0x14 | this.field_) << 8;\n      this.OFFSET_ = 0x17;\n    } else if (this.dataChannel_ === 1) {\n      this.BASE_ = 0x18;\n      this.EXT_ = 0x19;\n      this.CONTROL_ = (0x1c | this.field_) << 8;\n      this.OFFSET_ = 0x1f;\n    } // Constants for the LSByte command codes recognized by Cea608Stream. This\n    // list is not exhaustive. For a more comprehensive listing and semantics see\n    // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n    // Padding\n\n\n    this.PADDING_ = 0x0000; // Pop-on Mode\n\n    this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n    this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n    this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n    this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n    this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n    this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n    this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n    this.BACKSPACE_ = this.CONTROL_ | 0x21;\n    this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n    this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n  };\n  /**\n   * Detects if the 2-byte packet data is a special character\n   *\n   * Special characters have a second byte in the range 0x30 to 0x3f,\n   * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an special character\n   */\n\n\n  Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet data is an extended character\n   *\n   * Extended characters have a second byte in the range 0x20 to 0x3f,\n   * with the first byte being 0x12 or 0x13 (for data channel 1) or\n   * 0x1a or 0x1b (for data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an extended character\n   */\n\n\n  Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n    return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet is a mid-row code\n   *\n   * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n   * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n   * channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a mid-row code\n   */\n\n\n  Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n  };\n  /**\n   * Detects if the 2-byte packet is an offset control code\n   *\n   * Offset control codes have a second byte in the range 0x21 to 0x23,\n   * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an offset control code\n   */\n\n\n  Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n    return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n  };\n  /**\n   * Detects if the 2-byte packet is a Preamble Address Code\n   *\n   * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n   * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n   * range 0x40 to 0x7f.\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a PAC\n   */\n\n\n  Cea608Stream.prototype.isPAC = function (char0, char1) {\n    return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a packet's second byte is in the range of a PAC color code\n   *\n   * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n   * 0x60 to 0x6f.\n   *\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the byte is a color PAC\n   */\n\n\n  Cea608Stream.prototype.isColorPAC = function (char1) {\n    return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a single byte is in the range of a normal character\n   *\n   * Normal text bytes are in the range 0x20 to 0x7f.\n   *\n   * @param  {Integer} char  The byte\n   * @return {Boolean}       Whether the byte is a normal character\n   */\n\n\n  Cea608Stream.prototype.isNormalChar = function (_char2) {\n    return _char2 >= 0x20 && _char2 <= 0x7f;\n  };\n  /**\n   * Configures roll-up\n   *\n   * @param  {Integer} pts         Current PTS\n   * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n   *                               a new position\n   */\n\n\n  Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n    // Reset the base row to the bottom row when switching modes\n    if (this.mode_ !== 'rollUp') {\n      this.row_ = BOTTOM_ROW;\n      this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n      this.flushDisplayed(pts);\n      this.nonDisplayed_ = createDisplayBuffer();\n      this.displayed_ = createDisplayBuffer();\n    }\n\n    if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n      // move currently displayed captions (up or down) to the new base row\n      for (var i = 0; i < this.rollUpRows_; i++) {\n        this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n        this.displayed_[this.row_ - i] = '';\n      }\n    }\n\n    if (newBaseRow === undefined) {\n      newBaseRow = this.row_;\n    }\n\n    this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n  }; // Adds the opening HTML tag for the passed character to the caption text,\n  // and keeps track of it for later closing\n\n\n  Cea608Stream.prototype.addFormatting = function (pts, format) {\n    this.formatting_ = this.formatting_.concat(format);\n    var text = format.reduce(function (text, format) {\n      return text + '<' + format + '>';\n    }, '');\n    this[this.mode_](pts, text);\n  }; // Adds HTML closing tags for current formatting to caption text and\n  // clears remembered formatting\n\n\n  Cea608Stream.prototype.clearFormatting = function (pts) {\n    if (!this.formatting_.length) {\n      return;\n    }\n\n    var text = this.formatting_.reverse().reduce(function (text, format) {\n      return text + '</' + format + '>';\n    }, '');\n    this.formatting_ = [];\n    this[this.mode_](pts, text);\n  }; // Mode Implementations\n\n\n  Cea608Stream.prototype.popOn = function (pts, text) {\n    var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n    baseRow += text;\n    this.nonDisplayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.rollUp = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.shiftRowsUp_ = function () {\n    var i; // clear out inactive rows\n\n    for (i = 0; i < this.topRow_; i++) {\n      this.displayed_[i] = '';\n    }\n\n    for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n      this.displayed_[i] = '';\n    } // shift displayed rows up\n\n\n    for (i = this.topRow_; i < this.row_; i++) {\n      this.displayed_[i] = this.displayed_[i + 1];\n    } // clear out the bottom row\n\n\n    this.displayed_[this.row_] = '';\n  };\n\n  Cea608Stream.prototype.paintOn = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  }; // exports\n\n\n  var captionStream = {\n    CaptionStream: CaptionStream$1,\n    Cea608Stream: Cea608Stream,\n    Cea708Stream: Cea708Stream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var streamTypes = {\n    H264_STREAM_TYPE: 0x1B,\n    ADTS_STREAM_TYPE: 0x0F,\n    METADATA_STREAM_TYPE: 0x15\n  };\n  var MAX_TS = 8589934592;\n  var RO_THRESH = 4294967296;\n  var TYPE_SHARED = 'shared';\n\n  var handleRollover$1 = function handleRollover(value, reference) {\n    var direction = 1;\n\n    if (value > reference) {\n      // If the current timestamp value is greater than our reference timestamp and we detect a\n      // timestamp rollover, this means the roll over is happening in the opposite direction.\n      // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n      // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n      // rollover point. In loading this segment, the timestamp values will be very large,\n      // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n      // the time stamp to be `value - 2^33`.\n      direction = -1;\n    } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n    // cause an incorrect adjustment.\n\n\n    while (Math.abs(reference - value) > RO_THRESH) {\n      value += direction * MAX_TS;\n    }\n\n    return value;\n  };\n\n  var TimestampRolloverStream$1 = function TimestampRolloverStream(type) {\n    var lastDTS, referenceDTS;\n    TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n    // video and audio. We could use `undefined` here, but having a string\n    // makes debugging a little clearer.\n\n    this.type_ = type || TYPE_SHARED;\n\n    this.push = function (data) {\n      // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n      // streams will only accept data that matches their type.\n      if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n        return;\n      }\n\n      if (referenceDTS === undefined) {\n        referenceDTS = data.dts;\n      }\n\n      data.dts = handleRollover$1(data.dts, referenceDTS);\n      data.pts = handleRollover$1(data.pts, referenceDTS);\n      lastDTS = data.dts;\n      this.trigger('data', data);\n    };\n\n    this.flush = function () {\n      referenceDTS = lastDTS;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.discontinuity = function () {\n      referenceDTS = void 0;\n      lastDTS = void 0;\n    };\n\n    this.reset = function () {\n      this.discontinuity();\n      this.trigger('reset');\n    };\n  };\n\n  TimestampRolloverStream$1.prototype = new stream();\n  var timestampRolloverStream = {\n    TimestampRolloverStream: TimestampRolloverStream$1,\n    handleRollover: handleRollover$1\n  };\n\n  var percentEncode$1 = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as UTf-8.\n  parseUtf8 = function parseUtf8(bytes, start, end) {\n    return decodeURIComponent(percentEncode$1(bytes, start, end));\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n  parseIso88591$1 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n  },\n      parseSyncSafeInteger$1 = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  },\n      tagParsers = {\n    TXXX: function TXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the text fields\n          tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value\n\n          tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n          break;\n        }\n      }\n\n      tag.data = tag.value;\n    },\n    WXXX: function WXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n          break;\n        }\n      }\n    },\n    PRIV: function PRIV(tag) {\n      var i;\n\n      for (i = 0; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.owner = parseIso88591$1(tag.data, 0, i);\n          break;\n        }\n      }\n\n      tag.privateData = tag.data.subarray(i + 1);\n      tag.data = tag.privateData;\n    }\n  },\n      _MetadataStream;\n\n  _MetadataStream = function MetadataStream(options) {\n    var settings = {\n      // the bytes of the program-level descriptor field in MP2T\n      // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n      // program element descriptors\"\n      descriptor: options && options.descriptor\n    },\n        // the total size in bytes of the ID3 tag being parsed\n    tagSize = 0,\n        // tag data that is not complete enough to be parsed\n    buffer = [],\n        // the total number of bytes currently in the buffer\n    bufferSize = 0,\n        i;\n\n    _MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n    // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n\n    this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);\n\n    if (settings.descriptor) {\n      for (i = 0; i < settings.descriptor.length; i++) {\n        this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n      }\n    }\n\n    this.push = function (chunk) {\n      var tag, frameStart, frameSize, frame, i, frameHeader;\n\n      if (chunk.type !== 'timed-metadata') {\n        return;\n      } // if data_alignment_indicator is set in the PES header,\n      // we must have the start of a new ID3 tag. Assume anything\n      // remaining in the buffer was malformed and throw it out\n\n\n      if (chunk.dataAlignmentIndicator) {\n        bufferSize = 0;\n        buffer.length = 0;\n      } // ignore events that don't look like ID3 data\n\n\n      if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping unrecognized metadata packet'\n        });\n        return;\n      } // add this chunk to the data we've collected so far\n\n\n      buffer.push(chunk);\n      bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n      if (buffer.length === 1) {\n        // the frame size is transmitted as a 28-bit integer in the\n        // last four bytes of the ID3 header.\n        // The most significant bit of each byte is dropped and the\n        // results concatenated to recover the actual value.\n        tagSize = parseSyncSafeInteger$1(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n        // convenient for our comparisons to include it\n\n        tagSize += 10;\n      } // if the entire frame has not arrived, wait for more data\n\n\n      if (bufferSize < tagSize) {\n        return;\n      } // collect the entire frame so it can be parsed\n\n\n      tag = {\n        data: new Uint8Array(tagSize),\n        frames: [],\n        pts: buffer[0].pts,\n        dts: buffer[0].dts\n      };\n\n      for (i = 0; i < tagSize;) {\n        tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n        i += buffer[0].data.byteLength;\n        bufferSize -= buffer[0].data.byteLength;\n        buffer.shift();\n      } // find the start of the first frame and the end of the tag\n\n\n      frameStart = 10;\n\n      if (tag.data[5] & 0x40) {\n        // advance the frame start past the extended header\n        frameStart += 4; // header size field\n\n        frameStart += parseSyncSafeInteger$1(tag.data.subarray(10, 14)); // clip any padding off the end\n\n        tagSize -= parseSyncSafeInteger$1(tag.data.subarray(16, 20));\n      } // parse one or more ID3 frames\n      // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n      do {\n        // determine the number of bytes in this frame\n        frameSize = parseSyncSafeInteger$1(tag.data.subarray(frameStart + 4, frameStart + 8));\n\n        if (frameSize < 1) {\n          this.trigger('log', {\n            level: 'warn',\n            message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'\n          });\n          return;\n        }\n\n        frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n        frame = {\n          id: frameHeader,\n          data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n        };\n        frame.key = frame.id;\n\n        if (tagParsers[frame.id]) {\n          tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start\n          // time for raw AAC data\n\n          if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.data,\n                size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n            size *= 4;\n            size += d[7] & 0x03;\n            frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n            // on the value of this frame\n            // we couldn't have known the appropriate pts and dts before\n            // parsing this ID3 tag so set those values now\n\n            if (tag.pts === undefined && tag.dts === undefined) {\n              tag.pts = frame.timeStamp;\n              tag.dts = frame.timeStamp;\n            }\n\n            this.trigger('timestamp', frame);\n          }\n        }\n\n        tag.frames.push(frame);\n        frameStart += 10; // advance past the frame header\n\n        frameStart += frameSize; // advance past the frame body\n      } while (frameStart < tagSize);\n\n      this.trigger('data', tag);\n    };\n  };\n\n  _MetadataStream.prototype = new stream();\n  var metadataStream = _MetadataStream;\n  var TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types\n\n  var _TransportPacketStream, _TransportParseStream, _ElementaryStream; // constants\n\n\n  var MP2T_PACKET_LENGTH$1 = 188,\n      // bytes\n  SYNC_BYTE$1 = 0x47;\n  /**\n   * Splits an incoming stream of binary data into MPEG-2 Transport\n   * Stream packets.\n   */\n\n  _TransportPacketStream = function TransportPacketStream() {\n    var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),\n        bytesInBuffer = 0;\n\n    _TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n    /**\n     * Split a stream of data into M2TS packets\n    **/\n\n\n    this.push = function (bytes) {\n      var startIndex = 0,\n          endIndex = MP2T_PACKET_LENGTH$1,\n          everything; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (bytesInBuffer) {\n        everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n        everything.set(buffer.subarray(0, bytesInBuffer));\n        everything.set(bytes, bytesInBuffer);\n        bytesInBuffer = 0;\n      } else {\n        everything = bytes;\n      } // While we have enough data for a packet\n\n\n      while (endIndex < everything.byteLength) {\n        // Look for a pair of start and end sync bytes in the data..\n        if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {\n          // We found a packet so emit it and jump one whole packet forward in\n          // the stream\n          this.trigger('data', everything.subarray(startIndex, endIndex));\n          startIndex += MP2T_PACKET_LENGTH$1;\n          endIndex += MP2T_PACKET_LENGTH$1;\n          continue;\n        } // If we get here, we have somehow become de-synchronized and we need to step\n        // forward one byte at a time until we find a pair of sync bytes that denote\n        // a packet\n\n\n        startIndex++;\n        endIndex++;\n      } // If there was some data left over at the end of the segment that couldn't\n      // possibly be a whole packet, keep it because it might be the start of a packet\n      // that continues in the next segment\n\n\n      if (startIndex < everything.byteLength) {\n        buffer.set(everything.subarray(startIndex), 0);\n        bytesInBuffer = everything.byteLength - startIndex;\n      }\n    };\n    /**\n     * Passes identified M2TS packets to the TransportParseStream to be parsed\n    **/\n\n\n    this.flush = function () {\n      // If the buffer contains a whole packet when we are being flushed, emit it\n      // and empty the buffer. Otherwise hold onto the data because it may be\n      // important for decoding the next segment\n      if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {\n        this.trigger('data', buffer);\n        bytesInBuffer = 0;\n      }\n\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.reset = function () {\n      bytesInBuffer = 0;\n      this.trigger('reset');\n    };\n  };\n\n  _TransportPacketStream.prototype = new stream();\n  /**\n   * Accepts an MP2T TransportPacketStream and emits data events with parsed\n   * forms of the individual transport stream packets.\n   */\n\n  _TransportParseStream = function TransportParseStream() {\n    var parsePsi, parsePat, parsePmt, self;\n\n    _TransportParseStream.prototype.init.call(this);\n\n    self = this;\n    this.packetsWaitingForPmt = [];\n    this.programMapTable = undefined;\n\n    parsePsi = function parsePsi(payload, psi) {\n      var offset = 0; // PSI packets may be split into multiple sections and those\n      // sections may be split into multiple packets. If a PSI\n      // section starts in this packet, the payload_unit_start_indicator\n      // will be true and the first byte of the payload will indicate\n      // the offset from the current position to the start of the\n      // section.\n\n      if (psi.payloadUnitStartIndicator) {\n        offset += payload[offset] + 1;\n      }\n\n      if (psi.type === 'pat') {\n        parsePat(payload.subarray(offset), psi);\n      } else {\n        parsePmt(payload.subarray(offset), psi);\n      }\n    };\n\n    parsePat = function parsePat(payload, pat) {\n      pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n      pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n      // skip the PSI header and parse the first PMT entry\n\n      self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n      pat.pmtPid = self.pmtPid;\n    };\n    /**\n     * Parse out the relevant fields of a Program Map Table (PMT).\n     * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n     * packet. The first byte in this array should be the table_id\n     * field.\n     * @param pmt {object} the object that should be decorated with\n     * fields parsed from the PMT.\n     */\n\n\n    parsePmt = function parsePmt(payload, pmt) {\n      var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n      // take effect. We don't believe this should ever be the case\n      // for HLS but we'll ignore \"forward\" PMT declarations if we see\n      // them. Future PMT declarations have the current_next_indicator\n      // set to zero.\n\n      if (!(payload[5] & 0x01)) {\n        return;\n      } // overwrite any existing program map table\n\n\n      self.programMapTable = {\n        video: null,\n        audio: null,\n        'timed-metadata': {}\n      }; // the mapping table ends at the end of the current section\n\n      sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n      tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n      // long the program info descriptors are\n\n      programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n      offset = 12 + programInfoLength;\n\n      while (offset < tableEnd) {\n        var streamType = payload[offset];\n        var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n        // TODO: should this be done for metadata too? for now maintain behavior of\n        //       multiple metadata streams\n\n        if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {\n          self.programMapTable.video = pid;\n        } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n          self.programMapTable.audio = pid;\n        } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {\n          // map pid to stream type for metadata streams\n          self.programMapTable['timed-metadata'][pid] = streamType;\n        } // move to the next table entry\n        // skip past the elementary stream descriptors, if present\n\n\n        offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n      } // record the map on the packet as well\n\n\n      pmt.programMapTable = self.programMapTable;\n    };\n    /**\n     * Deliver a new MP2T packet to the next stream in the pipeline.\n     */\n\n\n    this.push = function (packet) {\n      var result = {},\n          offset = 4;\n      result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n      result.pid = packet[1] & 0x1f;\n      result.pid <<= 8;\n      result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n      // fifth byte of the TS packet header. The adaptation field is\n      // used to add stuffing to PES packets that don't fill a complete\n      // TS packet, and to specify some forms of timing and control data\n      // that we do not currently use.\n\n      if ((packet[3] & 0x30) >>> 4 > 0x01) {\n        offset += packet[offset] + 1;\n      } // parse the rest of the packet based on the type\n\n\n      if (result.pid === 0) {\n        result.type = 'pat';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result);\n      } else if (result.pid === this.pmtPid) {\n        result.type = 'pmt';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n        while (this.packetsWaitingForPmt.length) {\n          this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n        }\n      } else if (this.programMapTable === undefined) {\n        // When we have not seen a PMT yet, defer further processing of\n        // PES packets until one has been parsed\n        this.packetsWaitingForPmt.push([packet, offset, result]);\n      } else {\n        this.processPes_(packet, offset, result);\n      }\n    };\n\n    this.processPes_ = function (packet, offset, result) {\n      // set the appropriate stream type\n      if (result.pid === this.programMapTable.video) {\n        result.streamType = streamTypes.H264_STREAM_TYPE;\n      } else if (result.pid === this.programMapTable.audio) {\n        result.streamType = streamTypes.ADTS_STREAM_TYPE;\n      } else {\n        // if not video or audio, it is timed-metadata or unknown\n        // if unknown, streamType will be undefined\n        result.streamType = this.programMapTable['timed-metadata'][result.pid];\n      }\n\n      result.type = 'pes';\n      result.data = packet.subarray(offset);\n      this.trigger('data', result);\n    };\n  };\n\n  _TransportParseStream.prototype = new stream();\n  _TransportParseStream.STREAM_TYPES = {\n    h264: 0x1b,\n    adts: 0x0f\n  };\n  /**\n   * Reconsistutes program elementary stream (PES) packets from parsed\n   * transport stream packets. That is, if you pipe an\n   * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n   * events will be events which capture the bytes for individual PES\n   * packets plus relevant metadata that has been extracted from the\n   * container.\n   */\n\n  _ElementaryStream = function ElementaryStream() {\n    var self = this,\n        segmentHadPmt = false,\n        // PES packet fragments\n    video = {\n      data: [],\n      size: 0\n    },\n        audio = {\n      data: [],\n      size: 0\n    },\n        timedMetadata = {\n      data: [],\n      size: 0\n    },\n        programMapTable,\n        parsePes = function parsePes(payload, pes) {\n      var ptsDtsFlags;\n      var startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array\n\n      pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets\n      // that are frame data that is continuing from the previous fragment. This\n      // is to check that the pes data is the start of a new pes payload\n\n      if (startPrefix !== 1) {\n        return;\n      } // get the packet length, this will be 0 for video\n\n\n      pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n      pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n      // and a DTS value. Determine what combination of values is\n      // available to work with.\n\n      ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n      // performs all bitwise operations on 32-bit integers but javascript\n      // supports a much greater range (52-bits) of integer using standard\n      // mathematical operations.\n      // We construct a 31-bit value using bitwise operators over the 31\n      // most significant bits and then multiply by 4 (equal to a left-shift\n      // of 2) before we add the final 2 least significant bits of the\n      // timestamp (equal to an OR.)\n\n      if (ptsDtsFlags & 0xC0) {\n        // the PTS and DTS are not written out directly. For information\n        // on how they are encoded, see\n        // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n        pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n        pes.pts *= 4; // Left shift by 2\n\n        pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n        pes.dts = pes.pts;\n\n        if (ptsDtsFlags & 0x40) {\n          pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n          pes.dts *= 4; // Left shift by 2\n\n          pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n        }\n      } // the data section starts immediately after the PES header.\n      // pes_header_data_length specifies the number of header bytes\n      // that follow the last byte of the field.\n\n\n      pes.data = payload.subarray(9 + payload[8]);\n    },\n\n    /**\n      * Pass completely parsed PES packets to the next stream in the pipeline\n     **/\n    flushStream = function flushStream(stream, type, forceFlush) {\n      var packetData = new Uint8Array(stream.size),\n          event = {\n        type: type\n      },\n          i = 0,\n          offset = 0,\n          packetFlushable = false,\n          fragment; // do nothing if there is not enough buffered data for a complete\n      // PES header\n\n      if (!stream.data.length || stream.size < 9) {\n        return;\n      }\n\n      event.trackId = stream.data[0].pid; // reassemble the packet\n\n      for (i = 0; i < stream.data.length; i++) {\n        fragment = stream.data[i];\n        packetData.set(fragment.data, offset);\n        offset += fragment.data.byteLength;\n      } // parse assembled packet's PES header\n\n\n      parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n      // check that there is enough stream data to fill the packet\n\n      packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right\n\n      if (forceFlush || packetFlushable) {\n        stream.size = 0;\n        stream.data.length = 0;\n      } // only emit packets that are complete. this is to avoid assembling\n      // incomplete PES packets due to poor segmentation\n\n\n      if (packetFlushable) {\n        self.trigger('data', event);\n      }\n    };\n\n    _ElementaryStream.prototype.init.call(this);\n    /**\n     * Identifies M2TS packet types and parses PES packets using metadata\n     * parsed from the PMT\n     **/\n\n\n    this.push = function (data) {\n      ({\n        pat: function pat() {// we have to wait for the PMT to arrive as well before we\n          // have any meaningful metadata\n        },\n        pes: function pes() {\n          var stream, streamType;\n\n          switch (data.streamType) {\n            case streamTypes.H264_STREAM_TYPE:\n              stream = video;\n              streamType = 'video';\n              break;\n\n            case streamTypes.ADTS_STREAM_TYPE:\n              stream = audio;\n              streamType = 'audio';\n              break;\n\n            case streamTypes.METADATA_STREAM_TYPE:\n              stream = timedMetadata;\n              streamType = 'timed-metadata';\n              break;\n\n            default:\n              // ignore unknown stream types\n              return;\n          } // if a new packet is starting, we can flush the completed\n          // packet\n\n\n          if (data.payloadUnitStartIndicator) {\n            flushStream(stream, streamType, true);\n          } // buffer this fragment until we are sure we've received the\n          // complete payload\n\n\n          stream.data.push(data);\n          stream.size += data.data.byteLength;\n        },\n        pmt: function pmt() {\n          var event = {\n            type: 'metadata',\n            tracks: []\n          };\n          programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n          if (programMapTable.video !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.video,\n              codec: 'avc',\n              type: 'video'\n            });\n          }\n\n          if (programMapTable.audio !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.audio,\n              codec: 'adts',\n              type: 'audio'\n            });\n          }\n\n          segmentHadPmt = true;\n          self.trigger('data', event);\n        }\n      })[data.type]();\n    };\n\n    this.reset = function () {\n      video.size = 0;\n      video.data.length = 0;\n      audio.size = 0;\n      audio.data.length = 0;\n      this.trigger('reset');\n    };\n    /**\n     * Flush any remaining input. Video PES packets may be of variable\n     * length. Normally, the start of a new video packet can trigger the\n     * finalization of the previous packet. That is not possible if no\n     * more video is forthcoming, however. In that case, some other\n     * mechanism (like the end of the file) has to be employed. When it is\n     * clear that no additional data is forthcoming, calling this method\n     * will flush the buffered packets.\n     */\n\n\n    this.flushStreams_ = function () {\n      // !!THIS ORDER IS IMPORTANT!!\n      // video first then audio\n      flushStream(video, 'video');\n      flushStream(audio, 'audio');\n      flushStream(timedMetadata, 'timed-metadata');\n    };\n\n    this.flush = function () {\n      // if on flush we haven't had a pmt emitted\n      // and we have a pmt to emit. emit the pmt\n      // so that we trigger a trackinfo downstream.\n      if (!segmentHadPmt && programMapTable) {\n        var pmt = {\n          type: 'metadata',\n          tracks: []\n        }; // translate audio and video streams to tracks\n\n        if (programMapTable.video !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.video,\n            codec: 'avc',\n            type: 'video'\n          });\n        }\n\n        if (programMapTable.audio !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.audio,\n            codec: 'adts',\n            type: 'audio'\n          });\n        }\n\n        self.trigger('data', pmt);\n      }\n\n      segmentHadPmt = false;\n      this.flushStreams_();\n      this.trigger('done');\n    };\n  };\n\n  _ElementaryStream.prototype = new stream();\n  var m2ts = {\n    PAT_PID: 0x0000,\n    MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,\n    TransportPacketStream: _TransportPacketStream,\n    TransportParseStream: _TransportParseStream,\n    ElementaryStream: _ElementaryStream,\n    TimestampRolloverStream: TimestampRolloverStream,\n    CaptionStream: captionStream.CaptionStream,\n    Cea608Stream: captionStream.Cea608Stream,\n    Cea708Stream: captionStream.Cea708Stream,\n    MetadataStream: metadataStream\n  };\n\n  for (var type in streamTypes) {\n    if (streamTypes.hasOwnProperty(type)) {\n      m2ts[type] = streamTypes[type];\n    }\n  }\n\n  var m2ts_1 = m2ts;\n  var ONE_SECOND_IN_TS$2 = clock.ONE_SECOND_IN_TS;\n\n  var _AdtsStream;\n\n  var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n  /*\n   * Accepts a ElementaryStream and emits data events with parsed\n   * AAC Audio Frames of the individual packets. Input audio in ADTS\n   * format is unpacked and re-emitted as AAC frames.\n   *\n   * @see http://wiki.multimedia.cx/index.php?title=ADTS\n   * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n   */\n\n  _AdtsStream = function AdtsStream(handlePartialSegments) {\n    var buffer,\n        frameNum = 0;\n\n    _AdtsStream.prototype.init.call(this);\n\n    this.skipWarn_ = function (start, end) {\n      this.trigger('log', {\n        level: 'warn',\n        message: \"adts skiping bytes \" + start + \" to \" + end + \" in frame \" + frameNum + \" outside syncword\"\n      });\n    };\n\n    this.push = function (packet) {\n      var i = 0,\n          frameLength,\n          protectionSkipBytes,\n          oldBuffer,\n          sampleCount,\n          adtsFrameDuration;\n\n      if (!handlePartialSegments) {\n        frameNum = 0;\n      }\n\n      if (packet.type !== 'audio') {\n        // ignore non-audio data\n        return;\n      } // Prepend any data in the buffer to the input data so that we can parse\n      // aac frames the cross a PES packet boundary\n\n\n      if (buffer && buffer.length) {\n        oldBuffer = buffer;\n        buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n        buffer.set(oldBuffer);\n        buffer.set(packet.data, oldBuffer.byteLength);\n      } else {\n        buffer = packet.data;\n      } // unpack any ADTS frames which have been fully received\n      // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n\n      var skip; // We use i + 7 here because we want to be able to parse the entire header.\n      // If we don't have enough bytes to do that, then we definitely won't have a full frame.\n\n      while (i + 7 < buffer.length) {\n        // Look for the start of an ADTS header..\n        if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n          if (typeof skip !== 'number') {\n            skip = i;\n          } // If a valid header was not found,  jump one forward and attempt to\n          // find a valid ADTS header starting at the next byte\n\n\n          i++;\n          continue;\n        }\n\n        if (typeof skip === 'number') {\n          this.skipWarn_(skip, i);\n          skip = null;\n        } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n        // end of the ADTS header\n\n\n        protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n        // end of the sync sequence\n        // NOTE: frame length includes the size of the header\n\n        frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n        sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n        adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,\n        // then we have to wait for more data\n\n        if (buffer.byteLength - i < frameLength) {\n          break;\n        } // Otherwise, deliver the complete AAC frame\n\n\n        this.trigger('data', {\n          pts: packet.pts + frameNum * adtsFrameDuration,\n          dts: packet.dts + frameNum * adtsFrameDuration,\n          sampleCount: sampleCount,\n          audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n          channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n          samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],\n          samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n          // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n          samplesize: 16,\n          // data is the frame without it's header\n          data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)\n        });\n        frameNum++;\n        i += frameLength;\n      }\n\n      if (typeof skip === 'number') {\n        this.skipWarn_(skip, i);\n        skip = null;\n      } // remove processed bytes from the buffer.\n\n\n      buffer = buffer.subarray(i);\n    };\n\n    this.flush = function () {\n      frameNum = 0;\n      this.trigger('done');\n    };\n\n    this.reset = function () {\n      buffer = void 0;\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      buffer = void 0;\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AdtsStream.prototype = new stream();\n  var adts = _AdtsStream;\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ExpGolomb;\n  /**\n   * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n   * scheme used by h264.\n   */\n\n  ExpGolomb = function ExpGolomb(workingData) {\n    var // the number of bytes left to examine in workingData\n    workingBytesAvailable = workingData.byteLength,\n        // the current word being examined\n    workingWord = 0,\n        // :uint\n    // the number of bits left to examine in the current word\n    workingBitsAvailable = 0; // :uint;\n    // ():uint\n\n    this.length = function () {\n      return 8 * workingBytesAvailable;\n    }; // ():uint\n\n\n    this.bitsAvailable = function () {\n      return 8 * workingBytesAvailable + workingBitsAvailable;\n    }; // ():void\n\n\n    this.loadWord = function () {\n      var position = workingData.byteLength - workingBytesAvailable,\n          workingBytes = new Uint8Array(4),\n          availableBytes = Math.min(4, workingBytesAvailable);\n\n      if (availableBytes === 0) {\n        throw new Error('no bytes available');\n      }\n\n      workingBytes.set(workingData.subarray(position, position + availableBytes));\n      workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n      workingBitsAvailable = availableBytes * 8;\n      workingBytesAvailable -= availableBytes;\n    }; // (count:int):void\n\n\n    this.skipBits = function (count) {\n      var skipBytes; // :int\n\n      if (workingBitsAvailable > count) {\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      } else {\n        count -= workingBitsAvailable;\n        skipBytes = Math.floor(count / 8);\n        count -= skipBytes * 8;\n        workingBytesAvailable -= skipBytes;\n        this.loadWord();\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      }\n    }; // (size:int):uint\n\n\n    this.readBits = function (size) {\n      var bits = Math.min(workingBitsAvailable, size),\n          // :uint\n      valu = workingWord >>> 32 - bits; // :uint\n      // if size > 31, handle error\n\n      workingBitsAvailable -= bits;\n\n      if (workingBitsAvailable > 0) {\n        workingWord <<= bits;\n      } else if (workingBytesAvailable > 0) {\n        this.loadWord();\n      }\n\n      bits = size - bits;\n\n      if (bits > 0) {\n        return valu << bits | this.readBits(bits);\n      }\n\n      return valu;\n    }; // ():uint\n\n\n    this.skipLeadingZeros = function () {\n      var leadingZeroCount; // :uint\n\n      for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n        if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n          // the first bit of working word is 1\n          workingWord <<= leadingZeroCount;\n          workingBitsAvailable -= leadingZeroCount;\n          return leadingZeroCount;\n        }\n      } // we exhausted workingWord and still have not found a 1\n\n\n      this.loadWord();\n      return leadingZeroCount + this.skipLeadingZeros();\n    }; // ():void\n\n\n    this.skipUnsignedExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():void\n\n\n    this.skipExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():uint\n\n\n    this.readUnsignedExpGolomb = function () {\n      var clz = this.skipLeadingZeros(); // :uint\n\n      return this.readBits(clz + 1) - 1;\n    }; // ():int\n\n\n    this.readExpGolomb = function () {\n      var valu = this.readUnsignedExpGolomb(); // :int\n\n      if (0x01 & valu) {\n        // the number is odd if the low order bit is set\n        return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n      }\n\n      return -1 * (valu >>> 1); // divide by two then make it negative\n    }; // Some convenience functions\n    // :Boolean\n\n\n    this.readBoolean = function () {\n      return this.readBits(1) === 1;\n    }; // ():int\n\n\n    this.readUnsignedByte = function () {\n      return this.readBits(8);\n    };\n\n    this.loadWord();\n  };\n\n  var expGolomb = ExpGolomb;\n\n  var _H264Stream, _NalByteStream;\n\n  var PROFILES_WITH_OPTIONAL_SPS_DATA;\n  /**\n   * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n   */\n\n  _NalByteStream = function NalByteStream() {\n    var syncPoint = 0,\n        i,\n        buffer;\n\n    _NalByteStream.prototype.init.call(this);\n    /*\n     * Scans a byte stream and triggers a data event with the NAL units found.\n     * @param {Object} data Event received from H264Stream\n     * @param {Uint8Array} data.data The h264 byte stream to be scanned\n     *\n     * @see H264Stream.push\n     */\n\n\n    this.push = function (data) {\n      var swapBuffer;\n\n      if (!buffer) {\n        buffer = data.data;\n      } else {\n        swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n        swapBuffer.set(buffer);\n        swapBuffer.set(data.data, buffer.byteLength);\n        buffer = swapBuffer;\n      }\n\n      var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n      // scan for NAL unit boundaries\n      // a match looks like this:\n      // 0 0 1 .. NAL .. 0 0 1\n      // ^ sync point        ^ i\n      // or this:\n      // 0 0 1 .. NAL .. 0 0 0\n      // ^ sync point        ^ i\n      // advance the sync point to a NAL start, if necessary\n\n      for (; syncPoint < len - 3; syncPoint++) {\n        if (buffer[syncPoint + 2] === 1) {\n          // the sync point is properly aligned\n          i = syncPoint + 5;\n          break;\n        }\n      }\n\n      while (i < len) {\n        // look at the current byte to determine if we've hit the end of\n        // a NAL unit boundary\n        switch (buffer[i]) {\n          case 0:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0) {\n              i += 2;\n              break;\n            } else if (buffer[i - 2] !== 0) {\n              i++;\n              break;\n            } // deliver the NAL unit if it isn't empty\n\n\n            if (syncPoint + 3 !== i - 2) {\n              this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            } // drop trailing zeroes\n\n\n            do {\n              i++;\n            } while (buffer[i] !== 1 && i < len);\n\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          case 1:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n              i += 3;\n              break;\n            } // deliver the NAL unit\n\n\n            this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          default:\n            // the current byte isn't a one or zero, so it cannot be part\n            // of a sync sequence\n            i += 3;\n            break;\n        }\n      } // filter out the NAL units that were delivered\n\n\n      buffer = buffer.subarray(syncPoint);\n      i -= syncPoint;\n      syncPoint = 0;\n    };\n\n    this.reset = function () {\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('reset');\n    };\n\n    this.flush = function () {\n      // deliver the last buffered NAL unit\n      if (buffer && buffer.byteLength > 3) {\n        this.trigger('data', buffer.subarray(syncPoint + 3));\n      } // reset the stream state\n\n\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _NalByteStream.prototype = new stream(); // values of profile_idc that indicate additional fields are included in the SPS\n  // see Recommendation ITU-T H.264 (4/2013),\n  // 7.3.2.1.1 Sequence parameter set data syntax\n\n  PROFILES_WITH_OPTIONAL_SPS_DATA = {\n    100: true,\n    110: true,\n    122: true,\n    244: true,\n    44: true,\n    83: true,\n    86: true,\n    118: true,\n    128: true,\n    // TODO: the three profiles below don't\n    // appear to have sps data in the specificiation anymore?\n    138: true,\n    139: true,\n    134: true\n  };\n  /**\n   * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n   * events.\n   */\n\n  _H264Stream = function H264Stream() {\n    var nalByteStream = new _NalByteStream(),\n        self,\n        trackId,\n        currentPts,\n        currentDts,\n        discardEmulationPreventionBytes,\n        readSequenceParameterSet,\n        skipScalingList;\n\n    _H264Stream.prototype.init.call(this);\n\n    self = this;\n    /*\n     * Pushes a packet from a stream onto the NalByteStream\n     *\n     * @param {Object} packet - A packet received from a stream\n     * @param {Uint8Array} packet.data - The raw bytes of the packet\n     * @param {Number} packet.dts - Decode timestamp of the packet\n     * @param {Number} packet.pts - Presentation timestamp of the packet\n     * @param {Number} packet.trackId - The id of the h264 track this packet came from\n     * @param {('video'|'audio')} packet.type - The type of packet\n     *\n     */\n\n    this.push = function (packet) {\n      if (packet.type !== 'video') {\n        return;\n      }\n\n      trackId = packet.trackId;\n      currentPts = packet.pts;\n      currentDts = packet.dts;\n      nalByteStream.push(packet);\n    };\n    /*\n     * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n     * for the NALUs to the next stream component.\n     * Also, preprocess caption and sequence parameter NALUs.\n     *\n     * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n     * @see NalByteStream.push\n     */\n\n\n    nalByteStream.on('data', function (data) {\n      var event = {\n        trackId: trackId,\n        pts: currentPts,\n        dts: currentDts,\n        data: data,\n        nalUnitTypeCode: data[0] & 0x1f\n      };\n\n      switch (event.nalUnitTypeCode) {\n        case 0x05:\n          event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n          break;\n\n        case 0x06:\n          event.nalUnitType = 'sei_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          break;\n\n        case 0x07:\n          event.nalUnitType = 'seq_parameter_set_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          event.config = readSequenceParameterSet(event.escapedRBSP);\n          break;\n\n        case 0x08:\n          event.nalUnitType = 'pic_parameter_set_rbsp';\n          break;\n\n        case 0x09:\n          event.nalUnitType = 'access_unit_delimiter_rbsp';\n          break;\n      } // This triggers data on the H264Stream\n\n\n      self.trigger('data', event);\n    });\n    nalByteStream.on('done', function () {\n      self.trigger('done');\n    });\n    nalByteStream.on('partialdone', function () {\n      self.trigger('partialdone');\n    });\n    nalByteStream.on('reset', function () {\n      self.trigger('reset');\n    });\n    nalByteStream.on('endedtimeline', function () {\n      self.trigger('endedtimeline');\n    });\n\n    this.flush = function () {\n      nalByteStream.flush();\n    };\n\n    this.partialFlush = function () {\n      nalByteStream.partialFlush();\n    };\n\n    this.reset = function () {\n      nalByteStream.reset();\n    };\n\n    this.endTimeline = function () {\n      nalByteStream.endTimeline();\n    };\n    /**\n     * Advance the ExpGolomb decoder past a scaling list. The scaling\n     * list is optionally transmitted as part of a sequence parameter\n     * set and is not relevant to transmuxing.\n     * @param count {number} the number of entries in this scaling list\n     * @param expGolombDecoder {object} an ExpGolomb pointed to the\n     * start of a scaling list\n     * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n     */\n\n\n    skipScalingList = function skipScalingList(count, expGolombDecoder) {\n      var lastScale = 8,\n          nextScale = 8,\n          j,\n          deltaScale;\n\n      for (j = 0; j < count; j++) {\n        if (nextScale !== 0) {\n          deltaScale = expGolombDecoder.readExpGolomb();\n          nextScale = (lastScale + deltaScale + 256) % 256;\n        }\n\n        lastScale = nextScale === 0 ? lastScale : nextScale;\n      }\n    };\n    /**\n     * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n     * Sequence Payload\"\n     * @param data {Uint8Array} the bytes of a RBSP from a NAL\n     * unit\n     * @return {Uint8Array} the RBSP without any Emulation\n     * Prevention Bytes\n     */\n\n\n    discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n      var length = data.byteLength,\n          emulationPreventionBytesPositions = [],\n          i = 1,\n          newLength,\n          newData; // Find all `Emulation Prevention Bytes`\n\n      while (i < length - 2) {\n        if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n          emulationPreventionBytesPositions.push(i + 2);\n          i += 2;\n        } else {\n          i++;\n        }\n      } // If no Emulation Prevention Bytes were found just return the original\n      // array\n\n\n      if (emulationPreventionBytesPositions.length === 0) {\n        return data;\n      } // Create a new array to hold the NAL unit data\n\n\n      newLength = length - emulationPreventionBytesPositions.length;\n      newData = new Uint8Array(newLength);\n      var sourceIndex = 0;\n\n      for (i = 0; i < newLength; sourceIndex++, i++) {\n        if (sourceIndex === emulationPreventionBytesPositions[0]) {\n          // Skip this byte\n          sourceIndex++; // Remove this position index\n\n          emulationPreventionBytesPositions.shift();\n        }\n\n        newData[i] = data[sourceIndex];\n      }\n\n      return newData;\n    };\n    /**\n     * Read a sequence parameter set and return some interesting video\n     * properties. A sequence parameter set is the H264 metadata that\n     * describes the properties of upcoming video frames.\n     * @param data {Uint8Array} the bytes of a sequence parameter set\n     * @return {object} an object with configuration parsed from the\n     * sequence parameter set, including the dimensions of the\n     * associated video frames.\n     */\n\n\n    readSequenceParameterSet = function readSequenceParameterSet(data) {\n      var frameCropLeftOffset = 0,\n          frameCropRightOffset = 0,\n          frameCropTopOffset = 0,\n          frameCropBottomOffset = 0,\n          expGolombDecoder,\n          profileIdc,\n          levelIdc,\n          profileCompatibility,\n          chromaFormatIdc,\n          picOrderCntType,\n          numRefFramesInPicOrderCntCycle,\n          picWidthInMbsMinus1,\n          picHeightInMapUnitsMinus1,\n          frameMbsOnlyFlag,\n          scalingListCount,\n          sarRatio = [1, 1],\n          aspectRatioIdc,\n          i;\n      expGolombDecoder = new expGolomb(data);\n      profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n      profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n      levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n      // some profiles have more optional data we don't need\n\n      if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n        chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n\n        if (chromaFormatIdc === 3) {\n          expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n        expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n        if (expGolombDecoder.readBoolean()) {\n          // seq_scaling_matrix_present_flag\n          scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n\n          for (i = 0; i < scalingListCount; i++) {\n            if (expGolombDecoder.readBoolean()) {\n              // seq_scaling_list_present_flag[ i ]\n              if (i < 6) {\n                skipScalingList(16, expGolombDecoder);\n              } else {\n                skipScalingList(64, expGolombDecoder);\n              }\n            }\n          }\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n      picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n      if (picOrderCntType === 0) {\n        expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n      } else if (picOrderCntType === 1) {\n        expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n        numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n\n        for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n          expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n      expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n      picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n\n      if (frameMbsOnlyFlag === 0) {\n        expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n      }\n\n      expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n      if (expGolombDecoder.readBoolean()) {\n        // frame_cropping_flag\n        frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n      }\n\n      if (expGolombDecoder.readBoolean()) {\n        // vui_parameters_present_flag\n        if (expGolombDecoder.readBoolean()) {\n          // aspect_ratio_info_present_flag\n          aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n\n          switch (aspectRatioIdc) {\n            case 1:\n              sarRatio = [1, 1];\n              break;\n\n            case 2:\n              sarRatio = [12, 11];\n              break;\n\n            case 3:\n              sarRatio = [10, 11];\n              break;\n\n            case 4:\n              sarRatio = [16, 11];\n              break;\n\n            case 5:\n              sarRatio = [40, 33];\n              break;\n\n            case 6:\n              sarRatio = [24, 11];\n              break;\n\n            case 7:\n              sarRatio = [20, 11];\n              break;\n\n            case 8:\n              sarRatio = [32, 11];\n              break;\n\n            case 9:\n              sarRatio = [80, 33];\n              break;\n\n            case 10:\n              sarRatio = [18, 11];\n              break;\n\n            case 11:\n              sarRatio = [15, 11];\n              break;\n\n            case 12:\n              sarRatio = [64, 33];\n              break;\n\n            case 13:\n              sarRatio = [160, 99];\n              break;\n\n            case 14:\n              sarRatio = [4, 3];\n              break;\n\n            case 15:\n              sarRatio = [3, 2];\n              break;\n\n            case 16:\n              sarRatio = [2, 1];\n              break;\n\n            case 255:\n              {\n                sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n                break;\n              }\n          }\n\n          if (sarRatio) {\n            sarRatio[0] / sarRatio[1];\n          }\n        }\n      }\n\n      return {\n        profileIdc: profileIdc,\n        levelIdc: levelIdc,\n        profileCompatibility: profileCompatibility,\n        width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,\n        height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n        // sar is sample aspect ratio\n        sarRatio: sarRatio\n      };\n    };\n  };\n\n  _H264Stream.prototype = new stream();\n  var h264 = {\n    H264Stream: _H264Stream,\n    NalByteStream: _NalByteStream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Utilities to detect basic properties and metadata about Aac data.\n   */\n\n  var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\n  var parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n    var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n        flags = header[byteIndex + 5],\n        footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0\n\n    returnSize = returnSize >= 0 ? returnSize : 0;\n\n    if (footerPresent) {\n      return returnSize + 20;\n    }\n\n    return returnSize + 10;\n  };\n\n  var getId3Offset = function getId3Offset(data, offset) {\n    if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {\n      return offset;\n    }\n\n    offset += parseId3TagSize(data, offset);\n    return getId3Offset(data, offset);\n  }; // TODO: use vhs-utils\n\n\n  var isLikelyAacData$1 = function isLikelyAacData(data) {\n    var offset = getId3Offset(data, 0);\n    return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this\n    // is not mp3 data but aac data.\n    (data[offset + 1] & 0x16) === 0x10;\n  };\n\n  var parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  }; // return a percent-encoded representation of the specified byte range\n  // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\n  var percentEncode = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  }; // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n\n\n  var parseIso88591 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n  };\n\n  var parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n    var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n        middle = header[byteIndex + 4] << 3,\n        highTwo = header[byteIndex + 3] & 0x3 << 11;\n    return highTwo | middle | lowThree;\n  };\n\n  var parseType$2 = function parseType(header, byteIndex) {\n    if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n      return 'timed-metadata';\n    } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n      return 'audio';\n    }\n\n    return null;\n  };\n\n  var parseSampleRate = function parseSampleRate(packet) {\n    var i = 0;\n\n    while (i + 5 < packet.length) {\n      if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n        // If a valid header was not found,  jump one forward and attempt to\n        // find a valid ADTS header starting at the next byte\n        i++;\n        continue;\n      }\n\n      return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n    }\n\n    return null;\n  };\n\n  var parseAacTimestamp = function parseAacTimestamp(packet) {\n    var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n    frameStart = 10;\n\n    if (packet[5] & 0x40) {\n      // advance the frame start past the extended header\n      frameStart += 4; // header size field\n\n      frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n    } // parse one or more ID3 frames\n    // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n    do {\n      // determine the number of bytes in this frame\n      frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n\n      if (frameSize < 1) {\n        return null;\n      }\n\n      frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n      if (frameHeader === 'PRIV') {\n        frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n        for (var i = 0; i < frame.byteLength; i++) {\n          if (frame[i] === 0) {\n            var owner = parseIso88591(frame, 0, i);\n\n            if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n              var d = frame.subarray(i + 1);\n              var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n              size *= 4;\n              size += d[7] & 0x03;\n              return size;\n            }\n\n            break;\n          }\n        }\n      }\n\n      frameStart += 10; // advance past the frame header\n\n      frameStart += frameSize; // advance past the frame body\n    } while (frameStart < packet.byteLength);\n\n    return null;\n  };\n\n  var utils = {\n    isLikelyAacData: isLikelyAacData$1,\n    parseId3TagSize: parseId3TagSize,\n    parseAdtsSize: parseAdtsSize,\n    parseType: parseType$2,\n    parseSampleRate: parseSampleRate,\n    parseAacTimestamp: parseAacTimestamp\n  };\n\n  var _AacStream;\n  /**\n   * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n   */\n\n\n  _AacStream = function AacStream() {\n    var everything = new Uint8Array(),\n        timeStamp = 0;\n\n    _AacStream.prototype.init.call(this);\n\n    this.setTimestamp = function (timestamp) {\n      timeStamp = timestamp;\n    };\n\n    this.push = function (bytes) {\n      var frameSize = 0,\n          byteIndex = 0,\n          bytesLeft,\n          chunk,\n          packet,\n          tempLength; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (everything.length) {\n        tempLength = everything.length;\n        everything = new Uint8Array(bytes.byteLength + tempLength);\n        everything.set(everything.subarray(0, tempLength));\n        everything.set(bytes, tempLength);\n      } else {\n        everything = bytes;\n      }\n\n      while (everything.length - byteIndex >= 3) {\n        if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (everything.length - byteIndex < 10) {\n            break;\n          } // check framesize\n\n\n          frameSize = utils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n          // Add to byteIndex to support multiple ID3 tags in sequence\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          chunk = {\n            type: 'timed-metadata',\n            data: everything.subarray(byteIndex, byteIndex + frameSize)\n          };\n          this.trigger('data', chunk);\n          byteIndex += frameSize;\n          continue;\n        } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (everything.length - byteIndex < 7) {\n            break;\n          }\n\n          frameSize = utils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          packet = {\n            type: 'audio',\n            data: everything.subarray(byteIndex, byteIndex + frameSize),\n            pts: timeStamp,\n            dts: timeStamp\n          };\n          this.trigger('data', packet);\n          byteIndex += frameSize;\n          continue;\n        }\n\n        byteIndex++;\n      }\n\n      bytesLeft = everything.length - byteIndex;\n\n      if (bytesLeft > 0) {\n        everything = everything.subarray(byteIndex);\n      } else {\n        everything = new Uint8Array();\n      }\n    };\n\n    this.reset = function () {\n      everything = new Uint8Array();\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      everything = new Uint8Array();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AacStream.prototype = new stream();\n  var aac = _AacStream; // constants\n\n  var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n  var audioProperties = AUDIO_PROPERTIES;\n  var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];\n  var videoProperties = VIDEO_PROPERTIES;\n  var H264Stream = h264.H264Stream;\n  var isLikelyAacData = utils.isLikelyAacData;\n  var ONE_SECOND_IN_TS$1 = clock.ONE_SECOND_IN_TS; // object types\n\n  var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;\n\n  var retriggerForStream = function retriggerForStream(key, event) {\n    event.stream = key;\n    this.trigger('log', event);\n  };\n\n  var addPipelineLogRetriggers = function addPipelineLogRetriggers(transmuxer, pipeline) {\n    var keys = Object.keys(pipeline);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i]; // skip non-stream keys and headOfPipeline\n      // which is just a duplicate\n\n      if (key === 'headOfPipeline' || !pipeline[key].on) {\n        continue;\n      }\n\n      pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));\n    }\n  };\n  /**\n   * Compare two arrays (even typed) for same-ness\n   */\n\n\n  var arrayEquals = function arrayEquals(a, b) {\n    var i;\n\n    if (a.length !== b.length) {\n      return false;\n    } // compare the value of each element in the array\n\n\n    for (i = 0; i < a.length; i++) {\n      if (a[i] !== b[i]) {\n        return false;\n      }\n    }\n\n    return true;\n  };\n\n  var generateSegmentTimingInfo = function generateSegmentTimingInfo(baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n    var ptsOffsetFromDts = startPts - startDts,\n        decodeDuration = endDts - startDts,\n        presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n    // however, the player time values will reflect a start from the baseMediaDecodeTime.\n    // In order to provide relevant values for the player times, base timing info on the\n    // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n    return {\n      start: {\n        dts: baseMediaDecodeTime,\n        pts: baseMediaDecodeTime + ptsOffsetFromDts\n      },\n      end: {\n        dts: baseMediaDecodeTime + decodeDuration,\n        pts: baseMediaDecodeTime + presentationDuration\n      },\n      prependedContentDuration: prependedContentDuration,\n      baseMediaDecodeTime: baseMediaDecodeTime\n    };\n  };\n  /**\n   * Constructs a single-track, ISO BMFF media segment from AAC data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  _AudioSegmentStream = function AudioSegmentStream(track, options) {\n    var adtsFrames = [],\n        sequenceNumber,\n        earliestAllowedDts = 0,\n        audioAppendStartTs = 0,\n        videoBaseMediaDecodeTime = Infinity;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _AudioSegmentStream.prototype.init.call(this);\n\n    this.push = function (data) {\n      trackDecodeInfo.collectDtsInfo(track, data);\n\n      if (track) {\n        audioProperties.forEach(function (prop) {\n          track[prop] = data[prop];\n        });\n      } // buffer audio data until end() is called\n\n\n      adtsFrames.push(data);\n    };\n\n    this.setEarliestDts = function (earliestDts) {\n      earliestAllowedDts = earliestDts;\n    };\n\n    this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      videoBaseMediaDecodeTime = baseMediaDecodeTime;\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      audioAppendStartTs = timestamp;\n    };\n\n    this.flush = function () {\n      var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed\n\n      if (adtsFrames.length === 0) {\n        this.trigger('done', 'AudioSegmentStream');\n        return;\n      }\n\n      frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock\n\n      videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n      // samples (that is, adts frames) in the audio data\n\n      track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n      mdat = mp4Generator.mdat(audioFrameUtils.concatenateFrameData(frames));\n      adtsFrames = [];\n      moof = mp4Generator.moof(sequenceNumber, [track]);\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      trackDecodeInfo.clearDtsInfo(track);\n      frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n      // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n      // valid use-case where an init segment/data should be triggered without associated\n      // frames. Leaving for now, but should be looked into.\n\n      if (frames.length) {\n        segmentDuration = frames.length * frameDuration;\n        this.trigger('segmentTimingInfo', generateSegmentTimingInfo( // The audio track's baseMediaDecodeTime is in audio clock cycles, but the\n        // frame info is in video clock cycles. Convert to match expectation of\n        // listeners (that all timestamps will be based on video clock cycles).\n        clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate), // frame times are already in video clock, as is segment duration\n        frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));\n        this.trigger('timingInfo', {\n          start: frames[0].pts,\n          end: frames[0].pts + segmentDuration\n        });\n      }\n\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.trigger('done', 'AudioSegmentStream');\n    };\n\n    this.reset = function () {\n      trackDecodeInfo.clearDtsInfo(track);\n      adtsFrames = [];\n      this.trigger('reset');\n    };\n  };\n\n  _AudioSegmentStream.prototype = new stream();\n  /**\n   * Constructs a single-track, ISO BMFF media segment from H264 data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n   *        gopsToAlignWith list when attempting to align gop pts\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n  _VideoSegmentStream = function VideoSegmentStream(track, options) {\n    var sequenceNumber,\n        nalUnits = [],\n        gopsToAlignWith = [],\n        config,\n        pps;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _VideoSegmentStream.prototype.init.call(this);\n\n    delete track.minPTS;\n    this.gopCache_ = [];\n    /**\n      * Constructs a ISO BMFF segment given H264 nalUnits\n      * @param {Object} nalUnit A data event representing a nalUnit\n      * @param {String} nalUnit.nalUnitType\n      * @param {Object} nalUnit.config Properties for a mp4 track\n      * @param {Uint8Array} nalUnit.data The nalUnit bytes\n      * @see lib/codecs/h264.js\n     **/\n\n    this.push = function (nalUnit) {\n      trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n      if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n        config = nalUnit.config;\n        track.sps = [nalUnit.data];\n        videoProperties.forEach(function (prop) {\n          track[prop] = config[prop];\n        }, this);\n      }\n\n      if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n        pps = nalUnit.data;\n        track.pps = [nalUnit.data];\n      } // buffer video until flush() is called\n\n\n      nalUnits.push(nalUnit);\n    };\n    /**\n      * Pass constructed ISO BMFF track and boxes on to the\n      * next stream in the pipeline\n     **/\n\n\n    this.flush = function () {\n      var frames,\n          gopForFusion,\n          gops,\n          moof,\n          mdat,\n          boxes,\n          prependedContentDuration = 0,\n          firstGop,\n          lastGop; // Throw away nalUnits at the start of the byte stream until\n      // we find the first AUD\n\n      while (nalUnits.length) {\n        if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n          break;\n        }\n\n        nalUnits.shift();\n      } // Return early if no video data has been observed\n\n\n      if (nalUnits.length === 0) {\n        this.resetStream_();\n        this.trigger('done', 'VideoSegmentStream');\n        return;\n      } // Organize the raw nal-units into arrays that represent\n      // higher-level constructs such as frames and gops\n      // (group-of-pictures)\n\n\n      frames = frameUtils.groupNalsIntoFrames(nalUnits);\n      gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n      // a problem since MSE (on Chrome) requires a leading keyframe.\n      //\n      // We have two approaches to repairing this situation:\n      // 1) GOP-FUSION:\n      //    This is where we keep track of the GOPS (group-of-pictures)\n      //    from previous fragments and attempt to find one that we can\n      //    prepend to the current fragment in order to create a valid\n      //    fragment.\n      // 2) KEYFRAME-PULLING:\n      //    Here we search for the first keyframe in the fragment and\n      //    throw away all the frames between the start of the fragment\n      //    and that keyframe. We then extend the duration and pull the\n      //    PTS of the keyframe forward so that it covers the time range\n      //    of the frames that were disposed of.\n      //\n      // #1 is far prefereable over #2 which can cause \"stuttering\" but\n      // requires more things to be just right.\n\n      if (!gops[0][0].keyFrame) {\n        // Search for a gop for fusion from our gopCache\n        gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n        if (gopForFusion) {\n          // in order to provide more accurate timing information about the segment, save\n          // the number of seconds prepended to the original segment due to GOP fusion\n          prependedContentDuration = gopForFusion.duration;\n          gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n          // new gop at the beginning\n\n          gops.byteLength += gopForFusion.byteLength;\n          gops.nalCount += gopForFusion.nalCount;\n          gops.pts = gopForFusion.pts;\n          gops.dts = gopForFusion.dts;\n          gops.duration += gopForFusion.duration;\n        } else {\n          // If we didn't find a candidate gop fall back to keyframe-pulling\n          gops = frameUtils.extendFirstKeyFrame(gops);\n        }\n      } // Trim gops to align with gopsToAlignWith\n\n\n      if (gopsToAlignWith.length) {\n        var alignedGops;\n\n        if (options.alignGopsAtEnd) {\n          alignedGops = this.alignGopsAtEnd_(gops);\n        } else {\n          alignedGops = this.alignGopsAtStart_(gops);\n        }\n\n        if (!alignedGops) {\n          // save all the nals in the last GOP into the gop cache\n          this.gopCache_.unshift({\n            gop: gops.pop(),\n            pps: track.pps,\n            sps: track.sps\n          }); // Keep a maximum of 6 GOPs in the cache\n\n          this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n          nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n          this.resetStream_();\n          this.trigger('done', 'VideoSegmentStream');\n          return;\n        } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n        // when recalculated before sending off to CoalesceStream\n\n\n        trackDecodeInfo.clearDtsInfo(track);\n        gops = alignedGops;\n      }\n\n      trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n      // samples (that is, frames) in the video data\n\n      track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n      mdat = mp4Generator.mdat(frameUtils.concatenateNalData(gops));\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n      this.trigger('processedGopsInfo', gops.map(function (gop) {\n        return {\n          pts: gop.pts,\n          dts: gop.dts,\n          byteLength: gop.byteLength\n        };\n      }));\n      firstGop = gops[0];\n      lastGop = gops[gops.length - 1];\n      this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n      this.trigger('timingInfo', {\n        start: gops[0].pts,\n        end: gops[gops.length - 1].pts + gops[gops.length - 1].duration\n      }); // save all the nals in the last GOP into the gop cache\n\n      this.gopCache_.unshift({\n        gop: gops.pop(),\n        pps: track.pps,\n        sps: track.sps\n      }); // Keep a maximum of 6 GOPs in the cache\n\n      this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n      nalUnits = [];\n      this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n      this.trigger('timelineStartInfo', track.timelineStartInfo);\n      moof = mp4Generator.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n      // throwing away hundreds of media segment fragments\n\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.resetStream_(); // Continue with the flush process now\n\n      this.trigger('done', 'VideoSegmentStream');\n    };\n\n    this.reset = function () {\n      this.resetStream_();\n      nalUnits = [];\n      this.gopCache_.length = 0;\n      gopsToAlignWith.length = 0;\n      this.trigger('reset');\n    };\n\n    this.resetStream_ = function () {\n      trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n      // for instance, when we are rendition switching\n\n      config = undefined;\n      pps = undefined;\n    }; // Search for a candidate Gop for gop-fusion from the gop cache and\n    // return it or return null if no good candidate was found\n\n\n    this.getGopForFusion_ = function (nalUnit) {\n      var halfSecond = 45000,\n          // Half-a-second in a 90khz clock\n      allowableOverlap = 10000,\n          // About 3 frames @ 30fps\n      nearestDistance = Infinity,\n          dtsDistance,\n          nearestGopObj,\n          currentGop,\n          currentGopObj,\n          i; // Search for the GOP nearest to the beginning of this nal unit\n\n      for (i = 0; i < this.gopCache_.length; i++) {\n        currentGopObj = this.gopCache_[i];\n        currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n        if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n          continue;\n        } // Reject Gops that would require a negative baseMediaDecodeTime\n\n\n        if (currentGop.dts < track.timelineStartInfo.dts) {\n          continue;\n        } // The distance between the end of the gop and the start of the nalUnit\n\n\n        dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n        // a half-second of the nal unit\n\n        if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n          // Always use the closest GOP we found if there is more than\n          // one candidate\n          if (!nearestGopObj || nearestDistance > dtsDistance) {\n            nearestGopObj = currentGopObj;\n            nearestDistance = dtsDistance;\n          }\n        }\n      }\n\n      if (nearestGopObj) {\n        return nearestGopObj.gop;\n      }\n\n      return null;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the START of the list\n\n\n    this.alignGopsAtStart_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n      byteLength = gops.byteLength;\n      nalCount = gops.nalCount;\n      duration = gops.duration;\n      alignIndex = gopIndex = 0;\n\n      while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          break;\n        }\n\n        if (gop.pts > align.pts) {\n          // this current gop starts after the current gop we want to align on, so increment\n          // align index\n          alignIndex++;\n          continue;\n        } // current gop starts before the current gop we want to align on. so increment gop\n        // index\n\n\n        gopIndex++;\n        byteLength -= gop.byteLength;\n        nalCount -= gop.nalCount;\n        duration -= gop.duration;\n      }\n\n      if (gopIndex === 0) {\n        // no gops to trim\n        return gops;\n      }\n\n      if (gopIndex === gops.length) {\n        // all gops trimmed, skip appending all gops\n        return null;\n      }\n\n      alignedGops = gops.slice(gopIndex);\n      alignedGops.byteLength = byteLength;\n      alignedGops.duration = duration;\n      alignedGops.nalCount = nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the END of the list\n\n\n    this.alignGopsAtEnd_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n      alignIndex = gopsToAlignWith.length - 1;\n      gopIndex = gops.length - 1;\n      alignEndIndex = null;\n      matchFound = false;\n\n      while (alignIndex >= 0 && gopIndex >= 0) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          matchFound = true;\n          break;\n        }\n\n        if (align.pts > gop.pts) {\n          alignIndex--;\n          continue;\n        }\n\n        if (alignIndex === gopsToAlignWith.length - 1) {\n          // gop.pts is greater than the last alignment candidate. If no match is found\n          // by the end of this loop, we still want to append gops that come after this\n          // point\n          alignEndIndex = gopIndex;\n        }\n\n        gopIndex--;\n      }\n\n      if (!matchFound && alignEndIndex === null) {\n        return null;\n      }\n\n      var trimIndex;\n\n      if (matchFound) {\n        trimIndex = gopIndex;\n      } else {\n        trimIndex = alignEndIndex;\n      }\n\n      if (trimIndex === 0) {\n        return gops;\n      }\n\n      var alignedGops = gops.slice(trimIndex);\n      var metadata = alignedGops.reduce(function (total, gop) {\n        total.byteLength += gop.byteLength;\n        total.duration += gop.duration;\n        total.nalCount += gop.nalCount;\n        return total;\n      }, {\n        byteLength: 0,\n        duration: 0,\n        nalCount: 0\n      });\n      alignedGops.byteLength = metadata.byteLength;\n      alignedGops.duration = metadata.duration;\n      alignedGops.nalCount = metadata.nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    };\n\n    this.alignGopsWith = function (newGopsToAlignWith) {\n      gopsToAlignWith = newGopsToAlignWith;\n    };\n  };\n\n  _VideoSegmentStream.prototype = new stream();\n  /**\n   * A Stream that can combine multiple streams (ie. audio & video)\n   * into a single output segment for MSE. Also supports audio-only\n   * and video-only streams.\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at media timeline start.\n   */\n\n  _CoalesceStream = function CoalesceStream(options, metadataStream) {\n    // Number of Tracks per output segment\n    // If greater than 1, we combine multiple\n    // tracks into a single segment\n    this.numberOfTracks = 0;\n    this.metadataStream = metadataStream;\n    options = options || {};\n\n    if (typeof options.remux !== 'undefined') {\n      this.remuxTracks = !!options.remux;\n    } else {\n      this.remuxTracks = true;\n    }\n\n    if (typeof options.keepOriginalTimestamps === 'boolean') {\n      this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n    } else {\n      this.keepOriginalTimestamps = false;\n    }\n\n    this.pendingTracks = [];\n    this.videoTrack = null;\n    this.pendingBoxes = [];\n    this.pendingCaptions = [];\n    this.pendingMetadata = [];\n    this.pendingBytes = 0;\n    this.emittedTracks = 0;\n\n    _CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n\n    this.push = function (output) {\n      // buffer incoming captions until the associated video segment\n      // finishes\n      if (output.text) {\n        return this.pendingCaptions.push(output);\n      } // buffer incoming id3 tags until the final flush\n\n\n      if (output.frames) {\n        return this.pendingMetadata.push(output);\n      } // Add this track to the list of pending tracks and store\n      // important information required for the construction of\n      // the final segment\n\n\n      this.pendingTracks.push(output.track);\n      this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n      // We unshift audio and push video because\n      // as of Chrome 75 when switching from\n      // one init segment to another if the video\n      // mdat does not appear after the audio mdat\n      // only audio will play for the duration of our transmux.\n\n      if (output.track.type === 'video') {\n        this.videoTrack = output.track;\n        this.pendingBoxes.push(output.boxes);\n      }\n\n      if (output.track.type === 'audio') {\n        this.audioTrack = output.track;\n        this.pendingBoxes.unshift(output.boxes);\n      }\n    };\n  };\n\n  _CoalesceStream.prototype = new stream();\n\n  _CoalesceStream.prototype.flush = function (flushSource) {\n    var offset = 0,\n        event = {\n      captions: [],\n      captionStreams: {},\n      metadata: [],\n      info: {}\n    },\n        caption,\n        id3,\n        initSegment,\n        timelineStartPts = 0,\n        i;\n\n    if (this.pendingTracks.length < this.numberOfTracks) {\n      if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n        // Return because we haven't received a flush from a data-generating\n        // portion of the segment (meaning that we have only recieved meta-data\n        // or captions.)\n        return;\n      } else if (this.remuxTracks) {\n        // Return until we have enough tracks from the pipeline to remux (if we\n        // are remuxing audio and video into a single MP4)\n        return;\n      } else if (this.pendingTracks.length === 0) {\n        // In the case where we receive a flush without any data having been\n        // received we consider it an emitted track for the purposes of coalescing\n        // `done` events.\n        // We do this for the case where there is an audio and video track in the\n        // segment but no audio data. (seen in several playlists with alternate\n        // audio tracks and no audio present in the main TS segments.)\n        this.emittedTracks++;\n\n        if (this.emittedTracks >= this.numberOfTracks) {\n          this.trigger('done');\n          this.emittedTracks = 0;\n        }\n\n        return;\n      }\n    }\n\n    if (this.videoTrack) {\n      timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n      videoProperties.forEach(function (prop) {\n        event.info[prop] = this.videoTrack[prop];\n      }, this);\n    } else if (this.audioTrack) {\n      timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n      audioProperties.forEach(function (prop) {\n        event.info[prop] = this.audioTrack[prop];\n      }, this);\n    }\n\n    if (this.videoTrack || this.audioTrack) {\n      if (this.pendingTracks.length === 1) {\n        event.type = this.pendingTracks[0].type;\n      } else {\n        event.type = 'combined';\n      }\n\n      this.emittedTracks += this.pendingTracks.length;\n      initSegment = mp4Generator.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n      event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n      // and track definitions\n\n      event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n      event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n      for (i = 0; i < this.pendingBoxes.length; i++) {\n        event.data.set(this.pendingBoxes[i], offset);\n        offset += this.pendingBoxes[i].byteLength;\n      } // Translate caption PTS times into second offsets to match the\n      // video timeline for the segment, and add track info\n\n\n      for (i = 0; i < this.pendingCaptions.length; i++) {\n        caption = this.pendingCaptions[i];\n        caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n        caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n        event.captionStreams[caption.stream] = true;\n        event.captions.push(caption);\n      } // Translate ID3 frame PTS times into second offsets to match the\n      // video timeline for the segment\n\n\n      for (i = 0; i < this.pendingMetadata.length; i++) {\n        id3 = this.pendingMetadata[i];\n        id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n        event.metadata.push(id3);\n      } // We add this to every single emitted segment even though we only need\n      // it for the first\n\n\n      event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n      this.pendingTracks.length = 0;\n      this.videoTrack = null;\n      this.pendingBoxes.length = 0;\n      this.pendingCaptions.length = 0;\n      this.pendingBytes = 0;\n      this.pendingMetadata.length = 0; // Emit the built segment\n      // We include captions and ID3 tags for backwards compatibility,\n      // ideally we should send only video and audio in the data event\n\n      this.trigger('data', event); // Emit each caption to the outside world\n      // Ideally, this would happen immediately on parsing captions,\n      // but we need to ensure that video data is sent back first\n      // so that caption timing can be adjusted to match video timing\n\n      for (i = 0; i < event.captions.length; i++) {\n        caption = event.captions[i];\n        this.trigger('caption', caption);\n      } // Emit each id3 tag to the outside world\n      // Ideally, this would happen immediately on parsing the tag,\n      // but we need to ensure that video data is sent back first\n      // so that ID3 frame timing can be adjusted to match video timing\n\n\n      for (i = 0; i < event.metadata.length; i++) {\n        id3 = event.metadata[i];\n        this.trigger('id3Frame', id3);\n      }\n    } // Only emit `done` if all tracks have been flushed and emitted\n\n\n    if (this.emittedTracks >= this.numberOfTracks) {\n      this.trigger('done');\n      this.emittedTracks = 0;\n    }\n  };\n\n  _CoalesceStream.prototype.setRemux = function (val) {\n    this.remuxTracks = val;\n  };\n  /**\n   * A Stream that expects MP2T binary data as input and produces\n   * corresponding media segments, suitable for use with Media Source\n   * Extension (MSE) implementations that support the ISO BMFF byte\n   * stream format, like Chrome.\n   */\n\n\n  _Transmuxer = function Transmuxer(options) {\n    var self = this,\n        hasFlushed = true,\n        videoTrack,\n        audioTrack;\n\n    _Transmuxer.prototype.init.call(this);\n\n    options = options || {};\n    this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n    this.transmuxPipeline_ = {};\n\n    this.setupAacPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'aac';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.aacStream = new aac();\n      pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');\n      pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');\n      pipeline.adtsStream = new adts();\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.aacStream;\n      pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n      pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n      pipeline.metadataStream.on('timestamp', function (frame) {\n        pipeline.aacStream.setTimestamp(frame.timeStamp);\n      });\n      pipeline.aacStream.on('data', function (data) {\n        if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {\n          return;\n        }\n\n        audioTrack = audioTrack || {\n          timelineStartInfo: {\n            baseMediaDecodeTime: self.baseMediaDecodeTime\n          },\n          codec: 'adts',\n          type: 'audio'\n        }; // hook up the audio segment stream to the first track with aac data\n\n        pipeline.coalesceStream.numberOfTracks++;\n        pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n        pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n        pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n        pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info\n\n        self.trigger('trackinfo', {\n          hasAudio: !!audioTrack,\n          hasVideo: !!videoTrack\n        });\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    };\n\n    this.setupTsPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'ts';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.packetStream = new m2ts_1.TransportPacketStream();\n      pipeline.parseStream = new m2ts_1.TransportParseStream();\n      pipeline.elementaryStream = new m2ts_1.ElementaryStream();\n      pipeline.timestampRolloverStream = new m2ts_1.TimestampRolloverStream();\n      pipeline.adtsStream = new adts();\n      pipeline.h264Stream = new H264Stream();\n      pipeline.captionStream = new m2ts_1.CaptionStream(options);\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n      pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n      // demux the streams\n\n      pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n      pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n      pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n      pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n      pipeline.elementaryStream.on('data', function (data) {\n        var i;\n\n        if (data.type === 'metadata') {\n          i = data.tracks.length; // scan the tracks listed in the metadata\n\n          while (i--) {\n            if (!videoTrack && data.tracks[i].type === 'video') {\n              videoTrack = data.tracks[i];\n              videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            } else if (!audioTrack && data.tracks[i].type === 'audio') {\n              audioTrack = data.tracks[i];\n              audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            }\n          } // hook up the video segment stream to the first track with h264 data\n\n\n          if (videoTrack && !pipeline.videoSegmentStream) {\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);\n            pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));\n            pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n              // When video emits timelineStartInfo data after a flush, we forward that\n              // info to the AudioSegmentStream, if it exists, because video timeline\n              // data takes precedence.  Do not do this if keepOriginalTimestamps is set,\n              // because this is a particularly subtle form of timestamp alteration.\n              if (audioTrack && !options.keepOriginalTimestamps) {\n                audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n                // very earliest DTS we have seen in video because Chrome will\n                // interpret any video track with a baseMediaDecodeTime that is\n                // non-zero as a gap.\n\n                pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n            pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n            pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n              if (audioTrack) {\n                pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n            pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n          }\n\n          if (audioTrack && !pipeline.audioSegmentStream) {\n            // hook up the audio segment stream to the first track with aac data\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n            pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n            pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));\n            pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline\n\n            pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n          } // emit pmt info\n\n\n          self.trigger('trackinfo', {\n            hasAudio: !!audioTrack,\n            hasVideo: !!videoTrack\n          });\n        }\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n      pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n        id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n        self.trigger('id3Frame', id3Frame);\n      });\n      pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    }; // hook up the segment streams once track metadata is delivered\n\n\n    this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      var pipeline = this.transmuxPipeline_;\n\n      if (!options.keepOriginalTimestamps) {\n        this.baseMediaDecodeTime = baseMediaDecodeTime;\n      }\n\n      if (audioTrack) {\n        audioTrack.timelineStartInfo.dts = undefined;\n        audioTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(audioTrack);\n\n        if (pipeline.audioTimestampRolloverStream) {\n          pipeline.audioTimestampRolloverStream.discontinuity();\n        }\n      }\n\n      if (videoTrack) {\n        if (pipeline.videoSegmentStream) {\n          pipeline.videoSegmentStream.gopCache_ = [];\n        }\n\n        videoTrack.timelineStartInfo.dts = undefined;\n        videoTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(videoTrack);\n        pipeline.captionStream.reset();\n      }\n\n      if (pipeline.timestampRolloverStream) {\n        pipeline.timestampRolloverStream.discontinuity();\n      }\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      if (audioTrack) {\n        this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n      }\n    };\n\n    this.setRemux = function (val) {\n      var pipeline = this.transmuxPipeline_;\n      options.remux = val;\n\n      if (pipeline && pipeline.coalesceStream) {\n        pipeline.coalesceStream.setRemux(val);\n      }\n    };\n\n    this.alignGopsWith = function (gopsToAlignWith) {\n      if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n        this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n      }\n    };\n\n    this.getLogTrigger_ = function (key) {\n      var self = this;\n      return function (event) {\n        event.stream = key;\n        self.trigger('log', event);\n      };\n    }; // feed incoming data to the front of the parsing pipeline\n\n\n    this.push = function (data) {\n      if (hasFlushed) {\n        var isAac = isLikelyAacData(data);\n\n        if (isAac && this.transmuxPipeline_.type !== 'aac') {\n          this.setupAacPipeline();\n        } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n          this.setupTsPipeline();\n        }\n\n        hasFlushed = false;\n      }\n\n      this.transmuxPipeline_.headOfPipeline.push(data);\n    }; // flush any buffered data\n\n\n    this.flush = function () {\n      hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n      this.transmuxPipeline_.headOfPipeline.flush();\n    };\n\n    this.endTimeline = function () {\n      this.transmuxPipeline_.headOfPipeline.endTimeline();\n    };\n\n    this.reset = function () {\n      if (this.transmuxPipeline_.headOfPipeline) {\n        this.transmuxPipeline_.headOfPipeline.reset();\n      }\n    }; // Caption data has to be reset when seeking outside buffered range\n\n\n    this.resetCaptions = function () {\n      if (this.transmuxPipeline_.captionStream) {\n        this.transmuxPipeline_.captionStream.reset();\n      }\n    };\n  };\n\n  _Transmuxer.prototype = new stream();\n  var transmuxer = {\n    Transmuxer: _Transmuxer,\n    VideoSegmentStream: _VideoSegmentStream,\n    AudioSegmentStream: _AudioSegmentStream,\n    AUDIO_PROPERTIES: audioProperties,\n    VIDEO_PROPERTIES: videoProperties,\n    // exported for testing\n    generateSegmentTimingInfo: generateSegmentTimingInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var toUnsigned$3 = function toUnsigned(value) {\n    return value >>> 0;\n  };\n\n  var toHexString$1 = function toHexString(value) {\n    return ('00' + value.toString(16)).slice(-2);\n  };\n\n  var bin = {\n    toUnsigned: toUnsigned$3,\n    toHexString: toHexString$1\n  };\n\n  var parseType$1 = function parseType(buffer) {\n    var result = '';\n    result += String.fromCharCode(buffer[0]);\n    result += String.fromCharCode(buffer[1]);\n    result += String.fromCharCode(buffer[2]);\n    result += String.fromCharCode(buffer[3]);\n    return result;\n  };\n\n  var parseType_1 = parseType$1;\n  var toUnsigned$2 = bin.toUnsigned;\n\n  var findBox = function findBox(data, path) {\n    var results = [],\n        i,\n        size,\n        type,\n        end,\n        subresults;\n\n    if (!path.length) {\n      // short-circuit the search for empty paths\n      return null;\n    }\n\n    for (i = 0; i < data.byteLength;) {\n      size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n      type = parseType_1(data.subarray(i + 4, i + 8));\n      end = size > 1 ? i + size : data.byteLength;\n\n      if (type === path[0]) {\n        if (path.length === 1) {\n          // this is the end of the path and we've found the box we were\n          // looking for\n          results.push(data.subarray(i + 8, end));\n        } else {\n          // recursively search for the next box along the path\n          subresults = findBox(data.subarray(i + 8, end), path.slice(1));\n\n          if (subresults.length) {\n            results = results.concat(subresults);\n          }\n        }\n      }\n\n      i = end;\n    } // we've finished searching all of data\n\n\n    return results;\n  };\n\n  var findBox_1 = findBox;\n  var toUnsigned$1 = bin.toUnsigned;\n  var getUint64$1 = numbers.getUint64;\n\n  var tfdt = function tfdt(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      result.baseMediaDecodeTime = getUint64$1(data.subarray(4));\n    } else {\n      result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);\n    }\n\n    return result;\n  };\n\n  var parseTfdt = tfdt;\n\n  var parseSampleFlags = function parseSampleFlags(flags) {\n    return {\n      isLeading: (flags[0] & 0x0c) >>> 2,\n      dependsOn: flags[0] & 0x03,\n      isDependedOn: (flags[1] & 0xc0) >>> 6,\n      hasRedundancy: (flags[1] & 0x30) >>> 4,\n      paddingValue: (flags[1] & 0x0e) >>> 1,\n      isNonSyncSample: flags[1] & 0x01,\n      degradationPriority: flags[2] << 8 | flags[3]\n    };\n  };\n\n  var parseSampleFlags_1 = parseSampleFlags;\n\n  var trun = function trun(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        // Flag interpretation\n    dataOffsetPresent = result.flags[2] & 0x01,\n        // compare with 2nd byte of 0x1\n    firstSampleFlagsPresent = result.flags[2] & 0x04,\n        // compare with 2nd byte of 0x4\n    sampleDurationPresent = result.flags[1] & 0x01,\n        // compare with 2nd byte of 0x100\n    sampleSizePresent = result.flags[1] & 0x02,\n        // compare with 2nd byte of 0x200\n    sampleFlagsPresent = result.flags[1] & 0x04,\n        // compare with 2nd byte of 0x400\n    sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n        // compare with 2nd byte of 0x800\n    sampleCount = view.getUint32(4),\n        offset = 8,\n        sample;\n\n    if (dataOffsetPresent) {\n      // 32 bit signed integer\n      result.dataOffset = view.getInt32(offset);\n      offset += 4;\n    } // Overrides the flags for the first sample only. The order of\n    // optional values will be: duration, size, compositionTimeOffset\n\n\n    if (firstSampleFlagsPresent && sampleCount) {\n      sample = {\n        flags: parseSampleFlags_1(data.subarray(offset, offset + 4))\n      };\n      offset += 4;\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n      sampleCount--;\n    }\n\n    while (sampleCount--) {\n      sample = {};\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleFlagsPresent) {\n        sample.flags = parseSampleFlags_1(data.subarray(offset, offset + 4));\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n    }\n\n    return result;\n  };\n\n  var parseTrun = trun;\n\n  var tfhd = function tfhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4)\n    },\n        baseDataOffsetPresent = result.flags[2] & 0x01,\n        sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n        defaultSampleDurationPresent = result.flags[2] & 0x08,\n        defaultSampleSizePresent = result.flags[2] & 0x10,\n        defaultSampleFlagsPresent = result.flags[2] & 0x20,\n        durationIsEmpty = result.flags[0] & 0x010000,\n        defaultBaseIsMoof = result.flags[0] & 0x020000,\n        i;\n    i = 8;\n\n    if (baseDataOffsetPresent) {\n      i += 4; // truncate top 4 bytes\n      // FIXME: should we read the full 64 bits?\n\n      result.baseDataOffset = view.getUint32(12);\n      i += 4;\n    }\n\n    if (sampleDescriptionIndexPresent) {\n      result.sampleDescriptionIndex = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleDurationPresent) {\n      result.defaultSampleDuration = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleSizePresent) {\n      result.defaultSampleSize = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleFlagsPresent) {\n      result.defaultSampleFlags = view.getUint32(i);\n    }\n\n    if (durationIsEmpty) {\n      result.durationIsEmpty = true;\n    }\n\n    if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n      result.baseDataOffsetIsMoof = true;\n    }\n\n    return result;\n  };\n\n  var parseTfhd = tfhd;\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n  var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;\n  var CaptionStream = captionStream.CaptionStream;\n  /**\n    * Maps an offset in the mdat to a sample based on the the size of the samples.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Number} offset - The offset into the mdat\n    * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n    * @return {?Object} The matching sample, or null if no match was found.\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n  var mapToSample = function mapToSample(offset, samples) {\n    var approximateOffset = offset;\n\n    for (var i = 0; i < samples.length; i++) {\n      var sample = samples[i];\n\n      if (approximateOffset < sample.size) {\n        return sample;\n      }\n\n      approximateOffset -= sample.size;\n    }\n\n    return null;\n  };\n  /**\n    * Finds SEI nal units contained in a Media Data Box.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Uint8Array} avcStream - The bytes of the mdat\n    * @param {Object[]} samples - The samples parsed out by `parseSamples`\n    * @param {Number} trackId - The trackId of this video track\n    * @return {Object[]} seiNals - the parsed SEI NALUs found.\n    *   The contents of the seiNal should match what is expected by\n    *   CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n    *\n    * @see ISO-BMFF-12/2015, Section 8.1.1\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n   **/\n\n\n  var findSeiNals = function findSeiNals(avcStream, samples, trackId) {\n    var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n        result = {\n      logs: [],\n      seiNals: []\n    },\n        seiNal,\n        i,\n        length,\n        lastMatchedSample;\n\n    for (i = 0; i + 4 < avcStream.length; i += length) {\n      length = avcView.getUint32(i);\n      i += 4; // Bail if this doesn't appear to be an H264 stream\n\n      if (length <= 0) {\n        continue;\n      }\n\n      switch (avcStream[i] & 0x1F) {\n        case 0x06:\n          var data = avcStream.subarray(i + 1, i + 1 + length);\n          var matchingSample = mapToSample(i, samples);\n          seiNal = {\n            nalUnitType: 'sei_rbsp',\n            size: length,\n            data: data,\n            escapedRBSP: discardEmulationPreventionBytes(data),\n            trackId: trackId\n          };\n\n          if (matchingSample) {\n            seiNal.pts = matchingSample.pts;\n            seiNal.dts = matchingSample.dts;\n            lastMatchedSample = matchingSample;\n          } else if (lastMatchedSample) {\n            // If a matching sample cannot be found, use the last\n            // sample's values as they should be as close as possible\n            seiNal.pts = lastMatchedSample.pts;\n            seiNal.dts = lastMatchedSample.dts;\n          } else {\n            result.logs.push({\n              level: 'warn',\n              message: 'We\\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'\n            });\n            break;\n          }\n\n          result.seiNals.push(seiNal);\n          break;\n      }\n    }\n\n    return result;\n  };\n  /**\n    * Parses sample information out of Track Run Boxes and calculates\n    * the absolute presentation and decode timestamps of each sample.\n    *\n    * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n    * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt\n        @see ISO-BMFF-12/2015, Section 8.8.12\n    * @param {Object} tfhd - The parsed Track Fragment Header\n    *   @see inspect.parseTfhd\n    * @return {Object[]} the parsed samples\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n\n  var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {\n    var currentDts = baseMediaDecodeTime;\n    var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n    var defaultSampleSize = tfhd.defaultSampleSize || 0;\n    var trackId = tfhd.trackId;\n    var allSamples = [];\n    truns.forEach(function (trun) {\n      // Note: We currently do not parse the sample table as well\n      // as the trun. It's possible some sources will require this.\n      // moov > trak > mdia > minf > stbl\n      var trackRun = parseTrun(trun);\n      var samples = trackRun.samples;\n      samples.forEach(function (sample) {\n        if (sample.duration === undefined) {\n          sample.duration = defaultSampleDuration;\n        }\n\n        if (sample.size === undefined) {\n          sample.size = defaultSampleSize;\n        }\n\n        sample.trackId = trackId;\n        sample.dts = currentDts;\n\n        if (sample.compositionTimeOffset === undefined) {\n          sample.compositionTimeOffset = 0;\n        }\n\n        if (typeof currentDts === 'bigint') {\n          sample.pts = currentDts + window_1.BigInt(sample.compositionTimeOffset);\n          currentDts += window_1.BigInt(sample.duration);\n        } else {\n          sample.pts = currentDts + sample.compositionTimeOffset;\n          currentDts += sample.duration;\n        }\n      });\n      allSamples = allSamples.concat(samples);\n    });\n    return allSamples;\n  };\n  /**\n    * Parses out caption nals from an FMP4 segment's video tracks.\n    *\n    * @param {Uint8Array} segment - The bytes of a single segment\n    * @param {Number} videoTrackId - The trackId of a video track in the segment\n    * @return {Object.<Number, Object[]>} A mapping of video trackId to\n    *   a list of seiNals found in that track\n   **/\n\n\n  var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {\n    // To get the samples\n    var trafs = findBox_1(segment, ['moof', 'traf']); // To get SEI NAL units\n\n    var mdats = findBox_1(segment, ['mdat']);\n    var captionNals = {};\n    var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n    mdats.forEach(function (mdat, index) {\n      var matchingTraf = trafs[index];\n      mdatTrafPairs.push({\n        mdat: mdat,\n        traf: matchingTraf\n      });\n    });\n    mdatTrafPairs.forEach(function (pair) {\n      var mdat = pair.mdat;\n      var traf = pair.traf;\n      var tfhd = findBox_1(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n      var headerInfo = parseTfhd(tfhd[0]);\n      var trackId = headerInfo.trackId;\n      var tfdt = findBox_1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n      var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;\n      var truns = findBox_1(traf, ['trun']);\n      var samples;\n      var result; // Only parse video data for the chosen video track\n\n      if (videoTrackId === trackId && truns.length > 0) {\n        samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n        result = findSeiNals(mdat, samples, trackId);\n\n        if (!captionNals[trackId]) {\n          captionNals[trackId] = {\n            seiNals: [],\n            logs: []\n          };\n        }\n\n        captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);\n        captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);\n      }\n    });\n    return captionNals;\n  };\n  /**\n    * Parses out inband captions from an MP4 container and returns\n    * caption objects that can be used by WebVTT and the TextTrack API.\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n    * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n    *\n    * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n    * @param {Number} trackId - The id of the video track to parse\n    * @param {Number} timescale - The timescale for the video track from the init segment\n    *\n    * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n    * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n    * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n    * @return {String} parsedCaptions[].text - The visible content of the caption\n   **/\n\n\n  var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {\n    var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n    if (trackId === null) {\n      return null;\n    }\n\n    captionNals = parseCaptionNals(segment, trackId);\n    var trackNals = captionNals[trackId] || {};\n    return {\n      seiNals: trackNals.seiNals,\n      logs: trackNals.logs,\n      timescale: timescale\n    };\n  };\n  /**\n    * Converts SEI NALUs into captions that can be used by video.js\n   **/\n\n\n  var CaptionParser = function CaptionParser() {\n    var isInitialized = false;\n    var captionStream; // Stores segments seen before trackId and timescale are set\n\n    var segmentCache; // Stores video track ID of the track being parsed\n\n    var trackId; // Stores the timescale of the track being parsed\n\n    var timescale; // Stores captions parsed so far\n\n    var parsedCaptions; // Stores whether we are receiving partial data or not\n\n    var parsingPartial;\n    /**\n      * A method to indicate whether a CaptionParser has been initalized\n      * @returns {Boolean}\n     **/\n\n    this.isInitialized = function () {\n      return isInitialized;\n    };\n    /**\n      * Initializes the underlying CaptionStream, SEI NAL parsing\n      * and management, and caption collection\n     **/\n\n\n    this.init = function (options) {\n      captionStream = new CaptionStream();\n      isInitialized = true;\n      parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n      captionStream.on('data', function (event) {\n        // Convert to seconds in the source's timescale\n        event.startTime = event.startPts / timescale;\n        event.endTime = event.endPts / timescale;\n        parsedCaptions.captions.push(event);\n        parsedCaptions.captionStreams[event.stream] = true;\n      });\n      captionStream.on('log', function (log) {\n        parsedCaptions.logs.push(log);\n      });\n    };\n    /**\n      * Determines if a new video track will be selected\n      * or if the timescale changed\n      * @return {Boolean}\n     **/\n\n\n    this.isNewInit = function (videoTrackIds, timescales) {\n      if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n        return false;\n      }\n\n      return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n    };\n    /**\n      * Parses out SEI captions and interacts with underlying\n      * CaptionStream to return dispatched captions\n      *\n      * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n      * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n      * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n      * @see parseEmbeddedCaptions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.parse = function (segment, videoTrackIds, timescales) {\n      var parsedData;\n\n      if (!this.isInitialized()) {\n        return null; // This is not likely to be a video segment\n      } else if (!videoTrackIds || !timescales) {\n        return null;\n      } else if (this.isNewInit(videoTrackIds, timescales)) {\n        // Use the first video track only as there is no\n        // mechanism to switch to other video tracks\n        trackId = videoTrackIds[0];\n        timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n        // data until we have one.\n        // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n      } else if (trackId === null || !timescale) {\n        segmentCache.push(segment);\n        return null;\n      } // Now that a timescale and trackId is set, parse cached segments\n\n\n      while (segmentCache.length > 0) {\n        var cachedSegment = segmentCache.shift();\n        this.parse(cachedSegment, videoTrackIds, timescales);\n      }\n\n      parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n\n      if (parsedData && parsedData.logs) {\n        parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);\n      }\n\n      if (parsedData === null || !parsedData.seiNals) {\n        if (parsedCaptions.logs.length) {\n          return {\n            logs: parsedCaptions.logs,\n            captions: [],\n            captionStreams: []\n          };\n        }\n\n        return null;\n      }\n\n      this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n      this.flushStream();\n      return parsedCaptions;\n    };\n    /**\n      * Pushes SEI NALUs onto CaptionStream\n      * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n      * Assumes that `parseCaptionNals` has been called first\n      * @see m2ts/caption-stream.js\n      **/\n\n\n    this.pushNals = function (nals) {\n      if (!this.isInitialized() || !nals || nals.length === 0) {\n        return null;\n      }\n\n      nals.forEach(function (nal) {\n        captionStream.push(nal);\n      });\n    };\n    /**\n      * Flushes underlying CaptionStream to dispatch processed, displayable captions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.flushStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      if (!parsingPartial) {\n        captionStream.flush();\n      } else {\n        captionStream.partialFlush();\n      }\n    };\n    /**\n      * Reset caption buckets for new data\n     **/\n\n\n    this.clearParsedCaptions = function () {\n      parsedCaptions.captions = [];\n      parsedCaptions.captionStreams = {};\n      parsedCaptions.logs = [];\n    };\n    /**\n      * Resets underlying CaptionStream\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.resetCaptionStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      captionStream.reset();\n    };\n    /**\n      * Convenience method to clear all captions flushed from the\n      * CaptionStream and still being parsed\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.clearAllCaptions = function () {\n      this.clearParsedCaptions();\n      this.resetCaptionStream();\n    };\n    /**\n      * Reset caption parser\n     **/\n\n\n    this.reset = function () {\n      segmentCache = [];\n      trackId = null;\n      timescale = null;\n\n      if (!parsedCaptions) {\n        parsedCaptions = {\n          captions: [],\n          // CC1, CC2, CC3, CC4\n          captionStreams: {},\n          logs: []\n        };\n      } else {\n        this.clearParsedCaptions();\n      }\n\n      this.resetCaptionStream();\n    };\n\n    this.reset();\n  };\n\n  var captionParser = CaptionParser;\n  var toUnsigned = bin.toUnsigned;\n  var toHexString = bin.toHexString;\n  var getUint64 = numbers.getUint64;\n  var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;\n  /**\n   * Parses an MP4 initialization segment and extracts the timescale\n   * values for any declared tracks. Timescale values indicate the\n   * number of clock ticks per second to assume for time-based values\n   * elsewhere in the MP4.\n   *\n   * To determine the start time of an MP4, you need two pieces of\n   * information: the timescale unit and the earliest base media decode\n   * time. Multiple timescales can be specified within an MP4 but the\n   * base media decode time is always expressed in the timescale from\n   * the media header box for the track:\n   * ```\n   * moov > trak > mdia > mdhd.timescale\n   * ```\n   * @param init {Uint8Array} the bytes of the init segment\n   * @return {object} a hash of track ids to timescale values or null if\n   * the init segment is malformed.\n   */\n\n  timescale = function timescale(init) {\n    var result = {},\n        traks = findBox_1(init, ['moov', 'trak']); // mdhd timescale\n\n    return traks.reduce(function (result, trak) {\n      var tkhd, version, index, id, mdhd;\n      tkhd = findBox_1(trak, ['tkhd'])[0];\n\n      if (!tkhd) {\n        return null;\n      }\n\n      version = tkhd[0];\n      index = version === 0 ? 12 : 20;\n      id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n      mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (!mdhd) {\n        return null;\n      }\n\n      version = mdhd[0];\n      index = version === 0 ? 12 : 20;\n      result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n      return result;\n    }, result);\n  };\n  /**\n   * Determine the base media decode start time, in seconds, for an MP4\n   * fragment. If multiple fragments are specified, the earliest time is\n   * returned.\n   *\n   * The base media decode time can be parsed from track fragment\n   * metadata:\n   * ```\n   * moof > traf > tfdt.baseMediaDecodeTime\n   * ```\n   * It requires the timescale value from the mdhd to interpret.\n   *\n   * @param timescale {object} a hash of track ids to timescale values.\n   * @return {number} the earliest base media decode start time for the\n   * fragment, in seconds\n   */\n\n\n  startTime = function startTime(timescale, fragment) {\n    var trafs; // we need info from two childrend of each track fragment box\n\n    trafs = findBox_1(fragment, ['moof', 'traf']); // determine the start times for each track\n\n    var lowestTime = trafs.reduce(function (acc, traf) {\n      var tfhd = findBox_1(traf, ['tfhd'])[0]; // get the track id from the tfhd\n\n      var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n      var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n      var tfdt = findBox_1(traf, ['tfdt'])[0];\n      var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);\n      var baseTime; // version 1 is 64 bit\n\n      if (tfdt[0] === 1) {\n        baseTime = getUint64(tfdt.subarray(4, 12));\n      } else {\n        baseTime = dv.getUint32(4);\n      } // convert base time to seconds if it is a valid number.\n\n\n      var seconds;\n\n      if (typeof baseTime === 'bigint') {\n        seconds = baseTime / window_1.BigInt(scale);\n      } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {\n        seconds = baseTime / scale;\n      }\n\n      if (seconds < Number.MAX_SAFE_INTEGER) {\n        seconds = Number(seconds);\n      }\n\n      if (seconds < acc) {\n        acc = seconds;\n      }\n\n      return acc;\n    }, Infinity);\n    return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;\n  };\n  /**\n   * Determine the composition start, in seconds, for an MP4\n   * fragment.\n   *\n   * The composition start time of a fragment can be calculated using the base\n   * media decode time, composition time offset, and timescale, as follows:\n   *\n   * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale\n   *\n   * All of the aforementioned information is contained within a media fragment's\n   * `traf` box, except for timescale info, which comes from the initialization\n   * segment, so a track id (also contained within a `traf`) is also necessary to\n   * associate it with a timescale\n   *\n   *\n   * @param timescales {object} - a hash of track ids to timescale values.\n   * @param fragment {Unit8Array} - the bytes of a media segment\n   * @return {number} the composition start time for the fragment, in seconds\n   **/\n\n\n  compositionStartTime = function compositionStartTime(timescales, fragment) {\n    var trafBoxes = findBox_1(fragment, ['moof', 'traf']);\n    var baseMediaDecodeTime = 0;\n    var compositionTimeOffset = 0;\n    var trackId;\n\n    if (trafBoxes && trafBoxes.length) {\n      // The spec states that track run samples contained within a `traf` box are contiguous, but\n      // it does not explicitly state whether the `traf` boxes themselves are contiguous.\n      // We will assume that they are, so we only need the first to calculate start time.\n      var tfhd = findBox_1(trafBoxes[0], ['tfhd'])[0];\n      var trun = findBox_1(trafBoxes[0], ['trun'])[0];\n      var tfdt = findBox_1(trafBoxes[0], ['tfdt'])[0];\n\n      if (tfhd) {\n        var parsedTfhd = parseTfhd(tfhd);\n        trackId = parsedTfhd.trackId;\n      }\n\n      if (tfdt) {\n        var parsedTfdt = parseTfdt(tfdt);\n        baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;\n      }\n\n      if (trun) {\n        var parsedTrun = parseTrun(trun);\n\n        if (parsedTrun.samples && parsedTrun.samples.length) {\n          compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;\n        }\n      }\n    } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was\n    // specified.\n\n\n    var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds\n\n    if (typeof baseMediaDecodeTime === 'bigint') {\n      compositionTimeOffset = window_1.BigInt(compositionTimeOffset);\n      timescale = window_1.BigInt(timescale);\n    }\n\n    var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;\n\n    if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {\n      result = Number(result);\n    }\n\n    return result;\n  };\n  /**\n    * Find the trackIds of the video tracks in this source.\n    * Found by parsing the Handler Reference and Track Header Boxes:\n    *   moov > trak > mdia > hdlr\n    *   moov > trak > tkhd\n    *\n    * @param {Uint8Array} init - The bytes of the init segment for this source\n    * @return {Number[]} A list of trackIds\n    *\n    * @see ISO-BMFF-12/2015, Section 8.4.3\n   **/\n\n\n  getVideoTrackIds = function getVideoTrackIds(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var videoTrackIds = [];\n    traks.forEach(function (trak) {\n      var hdlrs = findBox_1(trak, ['mdia', 'hdlr']);\n      var tkhds = findBox_1(trak, ['tkhd']);\n      hdlrs.forEach(function (hdlr, index) {\n        var handlerType = parseType_1(hdlr.subarray(8, 12));\n        var tkhd = tkhds[index];\n        var view;\n        var version;\n        var trackId;\n\n        if (handlerType === 'vide') {\n          view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n          version = view.getUint8(0);\n          trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n          videoTrackIds.push(trackId);\n        }\n      });\n    });\n    return videoTrackIds;\n  };\n\n  getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {\n    // mdhd is a FullBox, meaning it will have its own version as the first byte\n    var version = mdhd[0];\n    var index = version === 0 ? 12 : 20;\n    return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n  };\n  /**\n   * Get all the video, audio, and hint tracks from a non fragmented\n   * mp4 segment\n   */\n\n\n  getTracks = function getTracks(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var tracks = [];\n    traks.forEach(function (trak) {\n      var track = {};\n      var tkhd = findBox_1(trak, ['tkhd'])[0];\n      var view, tkhdVersion; // id\n\n      if (tkhd) {\n        view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n        tkhdVersion = view.getUint8(0);\n        track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n      }\n\n      var hdlr = findBox_1(trak, ['mdia', 'hdlr'])[0]; // type\n\n      if (hdlr) {\n        var type = parseType_1(hdlr.subarray(8, 12));\n\n        if (type === 'vide') {\n          track.type = 'video';\n        } else if (type === 'soun') {\n          track.type = 'audio';\n        } else {\n          track.type = type;\n        }\n      } // codec\n\n\n      var stsd = findBox_1(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n\n      if (stsd) {\n        var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n        track.codec = parseType_1(sampleDescriptions.subarray(4, 8));\n        var codecBox = findBox_1(sampleDescriptions, [track.codec])[0];\n        var codecConfig, codecConfigType;\n\n        if (codecBox) {\n          // https://tools.ietf.org/html/rfc6381#section-3.3\n          if (/^[asm]vc[1-9]$/i.test(track.codec)) {\n            // we don't need anything but the \"config\" parameter of the\n            // avc1 codecBox\n            codecConfig = codecBox.subarray(78);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n              track.codec += '.'; // left padded with zeroes for single digit hex\n              // profile idc\n\n              track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n              track.codec += toHexString(codecConfig[10]); // level idc\n\n              track.codec += toHexString(codecConfig[11]);\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'avc1.4d400d';\n            }\n          } else if (/^mp4[a,v]$/i.test(track.codec)) {\n            // we do not need anything but the streamDescriptor of the mp4a codecBox\n            codecConfig = codecBox.subarray(28);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n              track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n              track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'mp4a.40.2';\n            }\n          } else {\n            // flac, opus, etc\n            track.codec = track.codec.toLowerCase();\n          }\n        }\n      }\n\n      var mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (mdhd) {\n        track.timescale = getTimescaleFromMediaHeader(mdhd);\n      }\n\n      tracks.push(track);\n    });\n    return tracks;\n  };\n\n  var probe$2 = {\n    // export mp4 inspector's findBox and parseType for backwards compatibility\n    findBox: findBox_1,\n    parseType: parseType_1,\n    timescale: timescale,\n    startTime: startTime,\n    compositionStartTime: compositionStartTime,\n    videoTrackIds: getVideoTrackIds,\n    tracks: getTracks,\n    getTimescaleFromMediaHeader: getTimescaleFromMediaHeader\n  };\n\n  var parsePid = function parsePid(packet) {\n    var pid = packet[1] & 0x1f;\n    pid <<= 8;\n    pid |= packet[2];\n    return pid;\n  };\n\n  var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {\n    return !!(packet[1] & 0x40);\n  };\n\n  var parseAdaptionField = function parseAdaptionField(packet) {\n    var offset = 0; // if an adaption field is present, its length is specified by the\n    // fifth byte of the TS packet header. The adaptation field is\n    // used to add stuffing to PES packets that don't fill a complete\n    // TS packet, and to specify some forms of timing and control data\n    // that we do not currently use.\n\n    if ((packet[3] & 0x30) >>> 4 > 0x01) {\n      offset += packet[4] + 1;\n    }\n\n    return offset;\n  };\n\n  var parseType = function parseType(packet, pmtPid) {\n    var pid = parsePid(packet);\n\n    if (pid === 0) {\n      return 'pat';\n    } else if (pid === pmtPid) {\n      return 'pmt';\n    } else if (pmtPid) {\n      return 'pes';\n    }\n\n    return null;\n  };\n\n  var parsePat = function parsePat(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      offset += packet[offset] + 1;\n    }\n\n    return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n  };\n\n  var parsePmt = function parsePmt(packet) {\n    var programMapTable = {};\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var payloadOffset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      payloadOffset += packet[payloadOffset] + 1;\n    } // PMTs can be sent ahead of the time when they should actually\n    // take effect. We don't believe this should ever be the case\n    // for HLS but we'll ignore \"forward\" PMT declarations if we see\n    // them. Future PMT declarations have the current_next_indicator\n    // set to zero.\n\n\n    if (!(packet[payloadOffset + 5] & 0x01)) {\n      return;\n    }\n\n    var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n    sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n    tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n    // long the program info descriptors are\n\n    programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n    var offset = 12 + programInfoLength;\n\n    while (offset < tableEnd) {\n      var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n      programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n      // skip past the elementary stream descriptors, if present\n\n      offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n    }\n\n    return programMapTable;\n  };\n\n  var parsePesType = function parsePesType(packet, programMapTable) {\n    var pid = parsePid(packet);\n    var type = programMapTable[pid];\n\n    switch (type) {\n      case streamTypes.H264_STREAM_TYPE:\n        return 'video';\n\n      case streamTypes.ADTS_STREAM_TYPE:\n        return 'audio';\n\n      case streamTypes.METADATA_STREAM_TYPE:\n        return 'timed-metadata';\n\n      default:\n        return null;\n    }\n  };\n\n  var parsePesTime = function parsePesTime(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n\n    if (!pusi) {\n      return null;\n    }\n\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (offset >= packet.byteLength) {\n      // From the H 222.0 MPEG-TS spec\n      // \"For transport stream packets carrying PES packets, stuffing is needed when there\n      //  is insufficient PES packet data to completely fill the transport stream packet\n      //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n      //  the sum of the lengths of the data elements in it, so that the payload bytes\n      //  remaining after the adaptation field exactly accommodates the available PES packet\n      //  data.\"\n      //\n      // If the offset is >= the length of the packet, then the packet contains no data\n      // and instead is just adaption field stuffing bytes\n      return null;\n    }\n\n    var pes = null;\n    var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n    // and a DTS value. Determine what combination of values is\n    // available to work with.\n\n    ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n    // performs all bitwise operations on 32-bit integers but javascript\n    // supports a much greater range (52-bits) of integer using standard\n    // mathematical operations.\n    // We construct a 31-bit value using bitwise operators over the 31\n    // most significant bits and then multiply by 4 (equal to a left-shift\n    // of 2) before we add the final 2 least significant bits of the\n    // timestamp (equal to an OR.)\n\n    if (ptsDtsFlags & 0xC0) {\n      pes = {}; // the PTS and DTS are not written out directly. For information\n      // on how they are encoded, see\n      // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n      pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n      pes.pts *= 4; // Left shift by 2\n\n      pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n      pes.dts = pes.pts;\n\n      if (ptsDtsFlags & 0x40) {\n        pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n        pes.dts *= 4; // Left shift by 2\n\n        pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n      }\n    }\n\n    return pes;\n  };\n\n  var parseNalUnitType = function parseNalUnitType(type) {\n    switch (type) {\n      case 0x05:\n        return 'slice_layer_without_partitioning_rbsp_idr';\n\n      case 0x06:\n        return 'sei_rbsp';\n\n      case 0x07:\n        return 'seq_parameter_set_rbsp';\n\n      case 0x08:\n        return 'pic_parameter_set_rbsp';\n\n      case 0x09:\n        return 'access_unit_delimiter_rbsp';\n\n      default:\n        return null;\n    }\n  };\n\n  var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {\n    var offset = 4 + parseAdaptionField(packet);\n    var frameBuffer = packet.subarray(offset);\n    var frameI = 0;\n    var frameSyncPoint = 0;\n    var foundKeyFrame = false;\n    var nalType; // advance the sync point to a NAL start, if necessary\n\n    for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n      if (frameBuffer[frameSyncPoint + 2] === 1) {\n        // the sync point is properly aligned\n        frameI = frameSyncPoint + 5;\n        break;\n      }\n    }\n\n    while (frameI < frameBuffer.byteLength) {\n      // look at the current byte to determine if we've hit the end of\n      // a NAL unit boundary\n      switch (frameBuffer[frameI]) {\n        case 0:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0) {\n            frameI += 2;\n            break;\n          } else if (frameBuffer[frameI - 2] !== 0) {\n            frameI++;\n            break;\n          }\n\n          if (frameSyncPoint + 3 !== frameI - 2) {\n            nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n            if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n              foundKeyFrame = true;\n            }\n          } // drop trailing zeroes\n\n\n          do {\n            frameI++;\n          } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        case 1:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n            frameI += 3;\n            break;\n          }\n\n          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n            foundKeyFrame = true;\n          }\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        default:\n          // the current byte isn't a one or zero, so it cannot be part\n          // of a sync sequence\n          frameI += 3;\n          break;\n      }\n    }\n\n    frameBuffer = frameBuffer.subarray(frameSyncPoint);\n    frameI -= frameSyncPoint;\n    frameSyncPoint = 0; // parse the final nal\n\n    if (frameBuffer && frameBuffer.byteLength > 3) {\n      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n        foundKeyFrame = true;\n      }\n    }\n\n    return foundKeyFrame;\n  };\n\n  var probe$1 = {\n    parseType: parseType,\n    parsePat: parsePat,\n    parsePmt: parsePmt,\n    parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n    parsePesType: parsePesType,\n    parsePesTime: parsePesTime,\n    videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n  };\n  var handleRollover = timestampRolloverStream.handleRollover;\n  var probe = {};\n  probe.ts = probe$1;\n  probe.aac = utils;\n  var ONE_SECOND_IN_TS = clock.ONE_SECOND_IN_TS;\n  var MP2T_PACKET_LENGTH = 188,\n      // bytes\n  SYNC_BYTE = 0x47;\n  /**\n   * walks through segment data looking for pat and pmt packets to parse out\n   * program map table information\n   */\n\n  var parsePsi_ = function parsePsi_(bytes, pmt) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type;\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pat':\n            pmt.pid = probe.ts.parsePat(packet);\n            break;\n\n          case 'pmt':\n            var table = probe.ts.parsePmt(packet);\n            pmt.table = pmt.table || {};\n            Object.keys(table).forEach(function (key) {\n              pmt.table[key] = table[key];\n            });\n            break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last audio pes packets\n   */\n\n\n  var parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed;\n    var endLoop = false; // Start walking from start of segment to get first audio packet\n\n    while (endIndex <= bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last audio packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last video pes packets as well as timing information for the first\n   * key frame.\n   */\n\n\n  var parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed,\n        frame,\n        i,\n        pes;\n    var endLoop = false;\n    var currentFrame = {\n      data: [],\n      size: 0\n    }; // Start walking from start of segment to get first video packet\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video') {\n              if (pusi && !endLoop) {\n                parsed = probe.ts.parsePesTime(packet);\n\n                if (parsed) {\n                  parsed.type = 'video';\n                  result.video.push(parsed);\n                  endLoop = true;\n                }\n              }\n\n              if (!result.firstKeyFrame) {\n                if (pusi) {\n                  if (currentFrame.size !== 0) {\n                    frame = new Uint8Array(currentFrame.size);\n                    i = 0;\n\n                    while (currentFrame.data.length) {\n                      pes = currentFrame.data.shift();\n                      frame.set(pes, i);\n                      i += pes.byteLength;\n                    }\n\n                    if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                      var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n                      // the keyframe seems to work fine with HLS playback\n                      // and definitely preferable to a crash with TypeError...\n\n                      if (firstKeyFrame) {\n                        result.firstKeyFrame = firstKeyFrame;\n                        result.firstKeyFrame.type = 'video';\n                      } else {\n                        // eslint-disable-next-line\n                        console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n                      }\n                    }\n\n                    currentFrame.size = 0;\n                  }\n                }\n\n                currentFrame.data.push(packet);\n                currentFrame.size += packet.byteLength;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop && result.firstKeyFrame) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last video packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * Adjusts the timestamp information for the segment to account for\n   * rollover and convert to seconds based on pes packet timescale (90khz clock)\n   */\n\n\n  var adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {\n    if (segmentInfo.audio && segmentInfo.audio.length) {\n      var audioBaseTimestamp = baseTimestamp;\n\n      if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {\n        audioBaseTimestamp = segmentInfo.audio[0].dts;\n      }\n\n      segmentInfo.audio.forEach(function (info) {\n        info.dts = handleRollover(info.dts, audioBaseTimestamp);\n        info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n    }\n\n    if (segmentInfo.video && segmentInfo.video.length) {\n      var videoBaseTimestamp = baseTimestamp;\n\n      if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {\n        videoBaseTimestamp = segmentInfo.video[0].dts;\n      }\n\n      segmentInfo.video.forEach(function (info) {\n        info.dts = handleRollover(info.dts, videoBaseTimestamp);\n        info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n\n      if (segmentInfo.firstKeyFrame) {\n        var frame = segmentInfo.firstKeyFrame;\n        frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n        frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n        frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n        frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;\n      }\n    }\n  };\n  /**\n   * inspects the aac data stream for start and end time information\n   */\n\n\n  var inspectAac_ = function inspectAac_(bytes) {\n    var endLoop = false,\n        audioCount = 0,\n        sampleRate = null,\n        timestamp = null,\n        frameSize = 0,\n        byteIndex = 0,\n        packet;\n\n    while (bytes.length - byteIndex >= 3) {\n      var type = probe.aac.parseType(bytes, byteIndex);\n\n      switch (type) {\n        case 'timed-metadata':\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (bytes.length - byteIndex < 10) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (timestamp === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            timestamp = probe.aac.parseAacTimestamp(packet);\n          }\n\n          byteIndex += frameSize;\n          break;\n\n        case 'audio':\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (bytes.length - byteIndex < 7) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (sampleRate === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            sampleRate = probe.aac.parseSampleRate(packet);\n          }\n\n          audioCount++;\n          byteIndex += frameSize;\n          break;\n\n        default:\n          byteIndex++;\n          break;\n      }\n\n      if (endLoop) {\n        return null;\n      }\n    }\n\n    if (sampleRate === null || timestamp === null) {\n      return null;\n    }\n\n    var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n    var result = {\n      audio: [{\n        type: 'audio',\n        dts: timestamp,\n        pts: timestamp\n      }, {\n        type: 'audio',\n        dts: timestamp + audioCount * 1024 * audioTimescale,\n        pts: timestamp + audioCount * 1024 * audioTimescale\n      }]\n    };\n    return result;\n  };\n  /**\n   * inspects the transport stream segment data for start and end time information\n   * of the audio and video tracks (when present) as well as the first key frame's\n   * start time.\n   */\n\n\n  var inspectTs_ = function inspectTs_(bytes) {\n    var pmt = {\n      pid: null,\n      table: null\n    };\n    var result = {};\n    parsePsi_(bytes, pmt);\n\n    for (var pid in pmt.table) {\n      if (pmt.table.hasOwnProperty(pid)) {\n        var type = pmt.table[pid];\n\n        switch (type) {\n          case streamTypes.H264_STREAM_TYPE:\n            result.video = [];\n            parseVideoPes_(bytes, pmt, result);\n\n            if (result.video.length === 0) {\n              delete result.video;\n            }\n\n            break;\n\n          case streamTypes.ADTS_STREAM_TYPE:\n            result.audio = [];\n            parseAudioPes_(bytes, pmt, result);\n\n            if (result.audio.length === 0) {\n              delete result.audio;\n            }\n\n            break;\n        }\n      }\n    }\n\n    return result;\n  };\n  /**\n   * Inspects segment byte data and returns an object with start and end timing information\n   *\n   * @param {Uint8Array} bytes The segment byte data\n   * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n   *  timestamps for rollover. This value must be in 90khz clock.\n   * @return {Object} Object containing start and end frame timing info of segment.\n   */\n\n\n  var inspect = function inspect(bytes, baseTimestamp) {\n    var isAacData = probe.aac.isLikelyAacData(bytes);\n    var result;\n\n    if (isAacData) {\n      result = inspectAac_(bytes);\n    } else {\n      result = inspectTs_(bytes);\n    }\n\n    if (!result || !result.audio && !result.video) {\n      return null;\n    }\n\n    adjustTimestamp_(result, baseTimestamp);\n    return result;\n  };\n\n  var tsInspector = {\n    inspect: inspect,\n    parseAudioPes_: parseAudioPes_\n  };\n  /* global self */\n\n  /**\n   * Re-emits transmuxer events by converting them into messages to the\n   * world outside the worker.\n   *\n   * @param {Object} transmuxer the transmuxer to wire events on\n   * @private\n   */\n\n  var wireTransmuxerEvents = function wireTransmuxerEvents(self, transmuxer) {\n    transmuxer.on('data', function (segment) {\n      // transfer ownership of the underlying ArrayBuffer\n      // instead of doing a copy to save memory\n      // ArrayBuffers are transferable but generic TypedArrays are not\n      // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n      var initArray = segment.initSegment;\n      segment.initSegment = {\n        data: initArray.buffer,\n        byteOffset: initArray.byteOffset,\n        byteLength: initArray.byteLength\n      };\n      var typedArray = segment.data;\n      segment.data = typedArray.buffer;\n      self.postMessage({\n        action: 'data',\n        segment: segment,\n        byteOffset: typedArray.byteOffset,\n        byteLength: typedArray.byteLength\n      }, [segment.data]);\n    });\n    transmuxer.on('done', function (data) {\n      self.postMessage({\n        action: 'done'\n      });\n    });\n    transmuxer.on('gopInfo', function (gopInfo) {\n      self.postMessage({\n        action: 'gopInfo',\n        gopInfo: gopInfo\n      });\n    });\n    transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {\n      var videoSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        videoSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'videoSegmentTimingInfo',\n        videoSegmentTimingInfo: videoSegmentTimingInfo\n      });\n    });\n    transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {\n      // Note that all times for [audio/video]SegmentTimingInfo events are in video clock\n      var audioSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        audioSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'audioSegmentTimingInfo',\n        audioSegmentTimingInfo: audioSegmentTimingInfo\n      });\n    });\n    transmuxer.on('id3Frame', function (id3Frame) {\n      self.postMessage({\n        action: 'id3Frame',\n        id3Frame: id3Frame\n      });\n    });\n    transmuxer.on('caption', function (caption) {\n      self.postMessage({\n        action: 'caption',\n        caption: caption\n      });\n    });\n    transmuxer.on('trackinfo', function (trackInfo) {\n      self.postMessage({\n        action: 'trackinfo',\n        trackInfo: trackInfo\n      });\n    });\n    transmuxer.on('audioTimingInfo', function (audioTimingInfo) {\n      // convert to video TS since we prioritize video time over audio\n      self.postMessage({\n        action: 'audioTimingInfo',\n        audioTimingInfo: {\n          start: clock.videoTsToSeconds(audioTimingInfo.start),\n          end: clock.videoTsToSeconds(audioTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('videoTimingInfo', function (videoTimingInfo) {\n      self.postMessage({\n        action: 'videoTimingInfo',\n        videoTimingInfo: {\n          start: clock.videoTsToSeconds(videoTimingInfo.start),\n          end: clock.videoTsToSeconds(videoTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('log', function (log) {\n      self.postMessage({\n        action: 'log',\n        log: log\n      });\n    });\n  };\n  /**\n   * All incoming messages route through this hash. If no function exists\n   * to handle an incoming message, then we ignore the message.\n   *\n   * @class MessageHandlers\n   * @param {Object} options the options to initialize with\n   */\n\n\n  var MessageHandlers = /*#__PURE__*/function () {\n    function MessageHandlers(self, options) {\n      this.options = options || {};\n      this.self = self;\n      this.init();\n    }\n    /**\n     * initialize our web worker and wire all the events.\n     */\n\n\n    var _proto = MessageHandlers.prototype;\n\n    _proto.init = function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n\n      this.transmuxer = new transmuxer.Transmuxer(this.options);\n      wireTransmuxerEvents(this.self, this.transmuxer);\n    };\n\n    _proto.pushMp4Captions = function pushMp4Captions(data) {\n      if (!this.captionParser) {\n        this.captionParser = new captionParser();\n        this.captionParser.init();\n      }\n\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      var parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);\n      this.self.postMessage({\n        action: 'mp4Captions',\n        captions: parsed && parsed.captions || [],\n        logs: parsed && parsed.logs || [],\n        data: segment.buffer\n      }, [segment.buffer]);\n    };\n\n    _proto.probeMp4StartTime = function probeMp4StartTime(_ref) {\n      var timescales = _ref.timescales,\n          data = _ref.data;\n      var startTime = probe$2.startTime(timescales, data);\n      this.self.postMessage({\n        action: 'probeMp4StartTime',\n        startTime: startTime,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.probeMp4Tracks = function probeMp4Tracks(_ref2) {\n      var data = _ref2.data;\n      var tracks = probe$2.tracks(data);\n      this.self.postMessage({\n        action: 'probeMp4Tracks',\n        tracks: tracks,\n        data: data\n      }, [data.buffer]);\n    }\n    /**\n     * Probe an mpeg2-ts segment to determine the start time of the segment in it's\n     * internal \"media time,\" as well as whether it contains video and/or audio.\n     *\n     * @private\n     * @param {Uint8Array} bytes - segment bytes\n     * @param {number} baseStartTime\n     *        Relative reference timestamp used when adjusting frame timestamps for rollover.\n     *        This value should be in seconds, as it's converted to a 90khz clock within the\n     *        function body.\n     * @return {Object} The start time of the current segment in \"media time\" as well as\n     *                  whether it contains video and/or audio\n     */\n    ;\n\n    _proto.probeTs = function probeTs(_ref3) {\n      var data = _ref3.data,\n          baseStartTime = _ref3.baseStartTime;\n      var tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock.ONE_SECOND_IN_TS : void 0;\n      var timeInfo = tsInspector.inspect(data, tsStartTime);\n      var result = null;\n\n      if (timeInfo) {\n        result = {\n          // each type's time info comes back as an array of 2 times, start and end\n          hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,\n          hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false\n        };\n\n        if (result.hasVideo) {\n          result.videoStart = timeInfo.video[0].ptsTime;\n        }\n\n        if (result.hasAudio) {\n          result.audioStart = timeInfo.audio[0].ptsTime;\n        }\n      }\n\n      this.self.postMessage({\n        action: 'probeTs',\n        result: result,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.clearAllMp4Captions = function clearAllMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearAllCaptions();\n      }\n    };\n\n    _proto.clearParsedMp4Captions = function clearParsedMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearParsedCaptions();\n      }\n    }\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n    ;\n\n    _proto.push = function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      this.transmuxer.push(segment);\n    }\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n    ;\n\n    _proto.reset = function reset() {\n      this.transmuxer.reset();\n    }\n    /**\n     * Set the value that will be used as the `baseMediaDecodeTime` time for the\n     * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n     * set relative to the first based on the PTS values.\n     *\n     * @param {Object} data used to set the timestamp offset in the muxer\n     */\n    ;\n\n    _proto.setTimestampOffset = function setTimestampOffset(data) {\n      var timestampOffset = data.timestampOffset || 0;\n      this.transmuxer.setBaseMediaDecodeTime(Math.round(clock.secondsToVideoTs(timestampOffset)));\n    };\n\n    _proto.setAudioAppendStart = function setAudioAppendStart(data) {\n      this.transmuxer.setAudioAppendStart(Math.ceil(clock.secondsToVideoTs(data.appendStart)));\n    };\n\n    _proto.setRemux = function setRemux(data) {\n      this.transmuxer.setRemux(data.remux);\n    }\n    /**\n     * Forces the pipeline to finish processing the last segment and emit it's\n     * results.\n     *\n     * @param {Object} data event data, not really used\n     */\n    ;\n\n    _proto.flush = function flush(data) {\n      this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed\n\n      self.postMessage({\n        action: 'done',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.endTimeline = function endTimeline() {\n      this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their\n      // timelines\n\n      self.postMessage({\n        action: 'endedtimeline',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.alignGopsWith = function alignGopsWith(data) {\n      this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n    };\n\n    return MessageHandlers;\n  }();\n  /**\n   * Our web worker interface so that things can talk to mux.js\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(self, event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers(self);\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n}));\nvar TransmuxWorker = factory(workerCode$1);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\nvar handleData_ = function handleData_(event, transmuxedData, callback) {\n  var _event$data$segment = event.data.segment,\n      type = _event$data$segment.type,\n      initSegment = _event$data$segment.initSegment,\n      captions = _event$data$segment.captions,\n      captionStreams = _event$data$segment.captionStreams,\n      metadata = _event$data$segment.metadata,\n      videoFrameDtsTime = _event$data$segment.videoFrameDtsTime,\n      videoFramePtsTime = _event$data$segment.videoFramePtsTime;\n  transmuxedData.buffer.push({\n    captions: captions,\n    captionStreams: captionStreams,\n    metadata: metadata\n  });\n  var boxes = event.data.segment.boxes || {\n    data: event.data.segment.data\n  };\n  var result = {\n    type: type,\n    // cast ArrayBuffer to TypedArray\n    data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),\n    initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)\n  };\n\n  if (typeof videoFrameDtsTime !== 'undefined') {\n    result.videoFrameDtsTime = videoFrameDtsTime;\n  }\n\n  if (typeof videoFramePtsTime !== 'undefined') {\n    result.videoFramePtsTime = videoFramePtsTime;\n  }\n\n  callback(result);\n};\n\nvar handleDone_ = function handleDone_(_ref) {\n  var transmuxedData = _ref.transmuxedData,\n      callback = _ref.callback; // Previously we only returned data on data events,\n  // not on done events. Clear out the buffer to keep that consistent.\n\n  transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we\n  // have received\n\n  callback(transmuxedData);\n};\n\nvar handleGopInfo_ = function handleGopInfo_(event, transmuxedData) {\n  transmuxedData.gopInfo = event.data.gopInfo;\n};\n\nvar processTransmux = function processTransmux(options) {\n  var transmuxer = options.transmuxer,\n      bytes = options.bytes,\n      audioAppendStart = options.audioAppendStart,\n      gopsToAlignWith = options.gopsToAlignWith,\n      remux = options.remux,\n      onData = options.onData,\n      onTrackInfo = options.onTrackInfo,\n      onAudioTimingInfo = options.onAudioTimingInfo,\n      onVideoTimingInfo = options.onVideoTimingInfo,\n      onVideoSegmentTimingInfo = options.onVideoSegmentTimingInfo,\n      onAudioSegmentTimingInfo = options.onAudioSegmentTimingInfo,\n      onId3 = options.onId3,\n      onCaptions = options.onCaptions,\n      onDone = options.onDone,\n      onEndedTimeline = options.onEndedTimeline,\n      onTransmuxerLog = options.onTransmuxerLog,\n      isEndOfTimeline = options.isEndOfTimeline;\n  var transmuxedData = {\n    buffer: []\n  };\n  var waitForEndedTimelineEvent = isEndOfTimeline;\n\n  var handleMessage = function handleMessage(event) {\n    if (transmuxer.currentTransmux !== options) {\n      // disposed\n      return;\n    }\n\n    if (event.data.action === 'data') {\n      handleData_(event, transmuxedData, onData);\n    }\n\n    if (event.data.action === 'trackinfo') {\n      onTrackInfo(event.data.trackInfo);\n    }\n\n    if (event.data.action === 'gopInfo') {\n      handleGopInfo_(event, transmuxedData);\n    }\n\n    if (event.data.action === 'audioTimingInfo') {\n      onAudioTimingInfo(event.data.audioTimingInfo);\n    }\n\n    if (event.data.action === 'videoTimingInfo') {\n      onVideoTimingInfo(event.data.videoTimingInfo);\n    }\n\n    if (event.data.action === 'videoSegmentTimingInfo') {\n      onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'audioSegmentTimingInfo') {\n      onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'id3Frame') {\n      onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);\n    }\n\n    if (event.data.action === 'caption') {\n      onCaptions(event.data.caption);\n    }\n\n    if (event.data.action === 'endedtimeline') {\n      waitForEndedTimelineEvent = false;\n      onEndedTimeline();\n    }\n\n    if (event.data.action === 'log') {\n      onTransmuxerLog(event.data.log);\n    } // wait for the transmuxed event since we may have audio and video\n\n\n    if (event.data.type !== 'transmuxed') {\n      return;\n    } // If the \"endedtimeline\" event has not yet fired, and this segment represents the end\n    // of a timeline, that means there may still be data events before the segment\n    // processing can be considerred complete. In that case, the final event should be\n    // an \"endedtimeline\" event with the type \"transmuxed.\"\n\n\n    if (waitForEndedTimelineEvent) {\n      return;\n    }\n\n    transmuxer.onmessage = null;\n    handleDone_({\n      transmuxedData: transmuxedData,\n      callback: onDone\n    });\n    /* eslint-disable no-use-before-define */\n\n    dequeue(transmuxer);\n    /* eslint-enable */\n  };\n\n  transmuxer.onmessage = handleMessage;\n\n  if (audioAppendStart) {\n    transmuxer.postMessage({\n      action: 'setAudioAppendStart',\n      appendStart: audioAppendStart\n    });\n  } // allow empty arrays to be passed to clear out GOPs\n\n\n  if (Array.isArray(gopsToAlignWith)) {\n    transmuxer.postMessage({\n      action: 'alignGopsWith',\n      gopsToAlignWith: gopsToAlignWith\n    });\n  }\n\n  if (typeof remux !== 'undefined') {\n    transmuxer.postMessage({\n      action: 'setRemux',\n      remux: remux\n    });\n  }\n\n  if (bytes.byteLength) {\n    var buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;\n    var byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;\n    transmuxer.postMessage({\n      action: 'push',\n      // Send the typed-array of data as an ArrayBuffer so that\n      // it can be sent as a \"Transferable\" and avoid the costly\n      // memory copy\n      data: buffer,\n      // To recreate the original typed-array, we need information\n      // about what portion of the ArrayBuffer it was a view into\n      byteOffset: byteOffset,\n      byteLength: bytes.byteLength\n    }, [buffer]);\n  }\n\n  if (isEndOfTimeline) {\n    transmuxer.postMessage({\n      action: 'endTimeline'\n    });\n  } // even if we didn't push any bytes, we have to make sure we flush in case we reached\n  // the end of the segment\n\n\n  transmuxer.postMessage({\n    action: 'flush'\n  });\n};\n\nvar dequeue = function dequeue(transmuxer) {\n  transmuxer.currentTransmux = null;\n\n  if (transmuxer.transmuxQueue.length) {\n    transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();\n\n    if (typeof transmuxer.currentTransmux === 'function') {\n      transmuxer.currentTransmux();\n    } else {\n      processTransmux(transmuxer.currentTransmux);\n    }\n  }\n};\n\nvar processAction = function processAction(transmuxer, action) {\n  transmuxer.postMessage({\n    action: action\n  });\n  dequeue(transmuxer);\n};\n\nvar enqueueAction = function enqueueAction(action, transmuxer) {\n  if (!transmuxer.currentTransmux) {\n    transmuxer.currentTransmux = action;\n    processAction(transmuxer, action);\n    return;\n  }\n\n  transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));\n};\n\nvar reset = function reset(transmuxer) {\n  enqueueAction('reset', transmuxer);\n};\n\nvar endTimeline = function endTimeline(transmuxer) {\n  enqueueAction('endTimeline', transmuxer);\n};\n\nvar transmux = function transmux(options) {\n  if (!options.transmuxer.currentTransmux) {\n    options.transmuxer.currentTransmux = options;\n    processTransmux(options);\n    return;\n  }\n\n  options.transmuxer.transmuxQueue.push(options);\n};\n\nvar createTransmuxer = function createTransmuxer(options) {\n  var transmuxer = new TransmuxWorker();\n  transmuxer.currentTransmux = null;\n  transmuxer.transmuxQueue = [];\n  var term = transmuxer.terminate;\n\n  transmuxer.terminate = function () {\n    transmuxer.currentTransmux = null;\n    transmuxer.transmuxQueue.length = 0;\n    return term.call(transmuxer);\n  };\n\n  transmuxer.postMessage({\n    action: 'init',\n    options: options\n  });\n  return transmuxer;\n};\n\nvar segmentTransmuxer = {\n  reset: reset,\n  endTimeline: endTimeline,\n  transmux: transmux,\n  createTransmuxer: createTransmuxer\n};\n\nvar workerCallback = function workerCallback(options) {\n  var transmuxer = options.transmuxer;\n  var endAction = options.endAction || options.action;\n  var callback = options.callback;\n\n  var message = _extends({}, options, {\n    endAction: null,\n    transmuxer: null,\n    callback: null\n  });\n\n  var listenForEndEvent = function listenForEndEvent(event) {\n    if (event.data.action !== endAction) {\n      return;\n    }\n\n    transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.\n\n    if (event.data.data) {\n      event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);\n\n      if (options.data) {\n        options.data = event.data.data;\n      }\n    }\n\n    callback(event.data);\n  };\n\n  transmuxer.addEventListener('message', listenForEndEvent);\n\n  if (options.data) {\n    var isArrayBuffer = options.data instanceof ArrayBuffer;\n    message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;\n    message.byteLength = options.data.byteLength;\n    var transfers = [isArrayBuffer ? options.data : options.data.buffer];\n    transmuxer.postMessage(message, transfers);\n  } else {\n    transmuxer.postMessage(message);\n  }\n};\n\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n  stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n  return stats;\n};\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\n\n\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {\n    return {\n      status: request.status,\n      message: 'Empty HLS response at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Array} objects - objects to add the key bytes to.\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleKeyResponse = function handleKeyResponse(segment, objects, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n    var bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n\n    for (var i = 0; i < objects.length; i++) {\n      objects[i].bytes = bytes;\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar parseInitSegment = function parseInitSegment(segment, _callback) {\n  var type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we\n  // only know how to parse mp4 init segments at the moment\n\n  if (type !== 'mp4') {\n    var uri = segment.map.resolvedUri || segment.map.uri;\n    return _callback({\n      internal: true,\n      message: \"Found unsupported \" + (type || 'unknown') + \" container for initialization segment at URL: \" + uri,\n      code: REQUEST_ERRORS.FAILURE\n    });\n  }\n\n  workerCallback({\n    action: 'probeMp4Tracks',\n    data: segment.map.bytes,\n    transmuxer: segment.transmuxer,\n    callback: function callback(_ref) {\n      var tracks = _ref.tracks,\n          data = _ref.data; // transfer bytes back to us\n\n      segment.map.bytes = data;\n      tracks.forEach(function (track) {\n        segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now\n\n        if (segment.map.tracks[track.type]) {\n          return;\n        }\n\n        segment.map.tracks[track.type] = track;\n\n        if (typeof track.id === 'number' && track.timescale) {\n          segment.map.timescales = segment.map.timescales || {};\n          segment.map.timescales[track.id] = track.timescale;\n        }\n      });\n      return _callback(null);\n    }\n  });\n};\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleInitSegmentResponse = function handleInitSegmentResponse(_ref2) {\n  var segment = _ref2.segment,\n      finishProcessingFn = _ref2.finishProcessingFn;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait\n    // until the key request is done to decrypt.\n\n    if (segment.map.key) {\n      segment.map.encryptedBytes = bytes;\n      return finishProcessingFn(null, segment);\n    }\n\n    segment.map.bytes = bytes;\n    parseInitSegment(segment, function (parseError) {\n      if (parseError) {\n        parseError.xhr = request;\n        parseError.status = request.status;\n        return finishProcessingFn(parseError, segment);\n      }\n\n      finishProcessingFn(null, segment);\n    });\n  };\n};\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleSegmentResponse = function handleSegmentResponse(_ref3) {\n  var segment = _ref3.segment,\n      finishProcessingFn = _ref3.finishProcessingFn,\n      responseType = _ref3.responseType;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var newBytes = // although responseText \"should\" exist, this guard serves to prevent an error being\n    // thrown for two primary cases:\n    // 1. the mime type override stops working, or is not implemented for a specific\n    //    browser\n    // 2. when using mock XHR libraries like sinon that do not allow the override behavior\n    responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(newBytes);\n    } else {\n      segment.bytes = new Uint8Array(newBytes);\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar transmuxAndNotify = function transmuxAndNotify(_ref4) {\n  var segment = _ref4.segment,\n      bytes = _ref4.bytes,\n      trackInfoFn = _ref4.trackInfoFn,\n      timingInfoFn = _ref4.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref4.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref4.audioSegmentTimingInfoFn,\n      id3Fn = _ref4.id3Fn,\n      captionsFn = _ref4.captionsFn,\n      isEndOfTimeline = _ref4.isEndOfTimeline,\n      endedTimelineFn = _ref4.endedTimelineFn,\n      dataFn = _ref4.dataFn,\n      doneFn = _ref4.doneFn,\n      onTransmuxerLog = _ref4.onTransmuxerLog;\n  var fmp4Tracks = segment.map && segment.map.tracks || {};\n  var isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.\n  // One reason for this is that in the case of full segments, we want to trust start\n  // times from the probe, rather than the transmuxer.\n\n  var audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');\n  var audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');\n  var videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');\n  var videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');\n\n  var finish = function finish() {\n    return transmux({\n      bytes: bytes,\n      transmuxer: segment.transmuxer,\n      audioAppendStart: segment.audioAppendStart,\n      gopsToAlignWith: segment.gopsToAlignWith,\n      remux: isMuxed,\n      onData: function onData(result) {\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        dataFn(segment, result);\n      },\n      onTrackInfo: function onTrackInfo(trackInfo) {\n        if (trackInfoFn) {\n          if (isMuxed) {\n            trackInfo.isMuxed = true;\n          }\n\n          trackInfoFn(segment, trackInfo);\n        }\n      },\n      onAudioTimingInfo: function onAudioTimingInfo(audioTimingInfo) {\n        // we only want the first start value we encounter\n        if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {\n          audioStartFn(audioTimingInfo.start);\n          audioStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {\n          audioEndFn(audioTimingInfo.end);\n        }\n      },\n      onVideoTimingInfo: function onVideoTimingInfo(videoTimingInfo) {\n        // we only want the first start value we encounter\n        if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {\n          videoStartFn(videoTimingInfo.start);\n          videoStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {\n          videoEndFn(videoTimingInfo.end);\n        }\n      },\n      onVideoSegmentTimingInfo: function onVideoSegmentTimingInfo(videoSegmentTimingInfo) {\n        videoSegmentTimingInfoFn(videoSegmentTimingInfo);\n      },\n      onAudioSegmentTimingInfo: function onAudioSegmentTimingInfo(audioSegmentTimingInfo) {\n        audioSegmentTimingInfoFn(audioSegmentTimingInfo);\n      },\n      onId3: function onId3(id3Frames, dispatchType) {\n        id3Fn(segment, id3Frames, dispatchType);\n      },\n      onCaptions: function onCaptions(captions) {\n        captionsFn(segment, [captions]);\n      },\n      isEndOfTimeline: isEndOfTimeline,\n      onEndedTimeline: function onEndedTimeline() {\n        endedTimelineFn();\n      },\n      onTransmuxerLog: onTransmuxerLog,\n      onDone: function onDone(result) {\n        if (!doneFn) {\n          return;\n        }\n\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        doneFn(null, segment, result);\n      }\n    });\n  }; // In the transmuxer, we don't yet have the ability to extract a \"proper\" start time.\n  // Meaning cached frame data may corrupt our notion of where this segment\n  // really starts. To get around this, probe for the info needed.\n\n\n  workerCallback({\n    action: 'probeTs',\n    transmuxer: segment.transmuxer,\n    data: bytes,\n    baseStartTime: segment.baseStartTime,\n    callback: function callback(data) {\n      segment.bytes = bytes = data.data;\n      var probeResult = data.result;\n\n      if (probeResult) {\n        trackInfoFn(segment, {\n          hasAudio: probeResult.hasAudio,\n          hasVideo: probeResult.hasVideo,\n          isMuxed: isMuxed\n        });\n        trackInfoFn = null;\n\n        if (probeResult.hasAudio && !isMuxed) {\n          audioStartFn(probeResult.audioStart);\n        }\n\n        if (probeResult.hasVideo) {\n          videoStartFn(probeResult.videoStart);\n        }\n\n        audioStartFn = null;\n        videoStartFn = null;\n      }\n\n      finish();\n    }\n  });\n};\n\nvar handleSegmentBytes = function handleSegmentBytes(_ref5) {\n  var segment = _ref5.segment,\n      bytes = _ref5.bytes,\n      trackInfoFn = _ref5.trackInfoFn,\n      timingInfoFn = _ref5.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref5.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref5.audioSegmentTimingInfoFn,\n      id3Fn = _ref5.id3Fn,\n      captionsFn = _ref5.captionsFn,\n      isEndOfTimeline = _ref5.isEndOfTimeline,\n      endedTimelineFn = _ref5.endedTimelineFn,\n      dataFn = _ref5.dataFn,\n      doneFn = _ref5.doneFn,\n      onTransmuxerLog = _ref5.onTransmuxerLog;\n  var bytesAsUint8Array = new Uint8Array(bytes); // TODO:\n  // We should have a handler that fetches the number of bytes required\n  // to check if something is fmp4. This will allow us to save bandwidth\n  // because we can only blacklist a playlist and abort requests\n  // by codec after trackinfo triggers.\n\n  if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {\n    segment.isFmp4 = true;\n    var tracks = segment.map.tracks;\n    var trackInfo = {\n      isFmp4: true,\n      hasVideo: !!tracks.video,\n      hasAudio: !!tracks.audio\n    }; // if we have a audio track, with a codec that is not set to\n    // encrypted audio\n\n    if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {\n      trackInfo.audioCodec = tracks.audio.codec;\n    } // if we have a video track, with a codec that is not set to\n    // encrypted video\n\n\n    if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {\n      trackInfo.videoCodec = tracks.video.codec;\n    }\n\n    if (tracks.video && tracks.audio) {\n      trackInfo.isMuxed = true;\n    } // since we don't support appending fmp4 data on progress, we know we have the full\n    // segment here\n\n\n    trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start\n    // time. The end time can be roughly calculated by the receiver using the duration.\n    //\n    // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as\n    // that is the true start of the segment (where the playback engine should begin\n    // decoding).\n\n    var finishLoading = function finishLoading(captions) {\n      // if the track still has audio at this point it is only possible\n      // for it to be audio only. See `tracks.video && tracks.audio` if statement\n      // above.\n      // we make sure to use segment.bytes here as that\n      dataFn(segment, {\n        data: bytesAsUint8Array,\n        type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'\n      });\n\n      if (captions && captions.length) {\n        captionsFn(segment, captions);\n      }\n\n      doneFn(null, segment, {});\n    };\n\n    workerCallback({\n      action: 'probeMp4StartTime',\n      timescales: segment.map.timescales,\n      data: bytesAsUint8Array,\n      transmuxer: segment.transmuxer,\n      callback: function callback(_ref6) {\n        var data = _ref6.data,\n            startTime = _ref6.startTime; // transfer bytes back to us\n\n        bytes = data.buffer;\n        segment.bytes = bytesAsUint8Array = data;\n\n        if (trackInfo.hasAudio && !trackInfo.isMuxed) {\n          timingInfoFn(segment, 'audio', 'start', startTime);\n        }\n\n        if (trackInfo.hasVideo) {\n          timingInfoFn(segment, 'video', 'start', startTime);\n        } // Run through the CaptionParser in case there are captions.\n        // Initialize CaptionParser if it hasn't been yet\n\n\n        if (!tracks.video || !data.byteLength || !segment.transmuxer) {\n          finishLoading();\n          return;\n        }\n\n        workerCallback({\n          action: 'pushMp4Captions',\n          endAction: 'mp4Captions',\n          transmuxer: segment.transmuxer,\n          data: bytesAsUint8Array,\n          timescales: segment.map.timescales,\n          trackIds: [tracks.video.id],\n          callback: function callback(message) {\n            // transfer bytes back to us\n            bytes = message.data.buffer;\n            segment.bytes = bytesAsUint8Array = message.data;\n            message.logs.forEach(function (log) {\n              onTransmuxerLog(videojs.mergeOptions(log, {\n                stream: 'mp4CaptionParser'\n              }));\n            });\n            finishLoading(message.captions);\n          }\n        });\n      }\n    });\n    return;\n  } // VTT or other segments that don't need processing\n\n\n  if (!segment.transmuxer) {\n    doneFn(null, segment, {});\n    return;\n  }\n\n  if (typeof segment.container === 'undefined') {\n    segment.container = detectContainerForBytes(bytesAsUint8Array);\n  }\n\n  if (segment.container !== 'ts' && segment.container !== 'aac') {\n    trackInfoFn(segment, {\n      hasAudio: false,\n      hasVideo: false\n    });\n    doneFn(null, segment, {});\n    return;\n  } // ts or aac\n\n\n  transmuxAndNotify({\n    segment: segment,\n    bytes: bytes,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  });\n};\n\nvar decrypt = function decrypt(_ref7, callback) {\n  var id = _ref7.id,\n      key = _ref7.key,\n      encryptedBytes = _ref7.encryptedBytes,\n      decryptionWorker = _ref7.decryptionWorker;\n\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === id) {\n      decryptionWorker.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n      callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));\n    }\n  };\n\n  decryptionWorker.addEventListener('message', decryptionHandler);\n  var keyBytes;\n\n  if (key.bytes.slice) {\n    keyBytes = key.bytes.slice();\n  } else {\n    keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));\n  } // incrementally decrypt the bytes\n\n\n  decryptionWorker.postMessage(createTransferableMessage({\n    source: id,\n    encrypted: encryptedBytes,\n    key: keyBytes,\n    iv: key.iv\n  }), [encryptedBytes.buffer, keyBytes.buffer]);\n};\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n\nvar decryptSegment = function decryptSegment(_ref8) {\n  var decryptionWorker = _ref8.decryptionWorker,\n      segment = _ref8.segment,\n      trackInfoFn = _ref8.trackInfoFn,\n      timingInfoFn = _ref8.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref8.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref8.audioSegmentTimingInfoFn,\n      id3Fn = _ref8.id3Fn,\n      captionsFn = _ref8.captionsFn,\n      isEndOfTimeline = _ref8.isEndOfTimeline,\n      endedTimelineFn = _ref8.endedTimelineFn,\n      dataFn = _ref8.dataFn,\n      doneFn = _ref8.doneFn,\n      onTransmuxerLog = _ref8.onTransmuxerLog;\n  decrypt({\n    id: segment.requestId,\n    key: segment.key,\n    encryptedBytes: segment.encryptedBytes,\n    decryptionWorker: decryptionWorker\n  }, function (decryptedBytes) {\n    segment.bytes = decryptedBytes;\n    handleSegmentBytes({\n      segment: segment,\n      bytes: segment.bytes,\n      trackInfoFn: trackInfoFn,\n      timingInfoFn: timingInfoFn,\n      videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n      id3Fn: id3Fn,\n      captionsFn: captionsFn,\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: endedTimelineFn,\n      dataFn: dataFn,\n      doneFn: doneFn,\n      onTransmuxerLog: onTransmuxerLog\n    });\n  });\n};\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\n\n\nvar waitForCompletion = function waitForCompletion(_ref9) {\n  var activeXhrs = _ref9.activeXhrs,\n      decryptionWorker = _ref9.decryptionWorker,\n      trackInfoFn = _ref9.trackInfoFn,\n      timingInfoFn = _ref9.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref9.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref9.audioSegmentTimingInfoFn,\n      id3Fn = _ref9.id3Fn,\n      captionsFn = _ref9.captionsFn,\n      isEndOfTimeline = _ref9.isEndOfTimeline,\n      endedTimelineFn = _ref9.endedTimelineFn,\n      dataFn = _ref9.dataFn,\n      doneFn = _ref9.doneFn,\n      onTransmuxerLog = _ref9.onTransmuxerLog;\n  var count = 0;\n  var didError = false;\n  return function (error, segment) {\n    if (didError) {\n      return;\n    }\n\n    if (error) {\n      didError = true; // If there are errors, we have to abort any outstanding requests\n\n      abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n      // handle the aborted events from those requests, there are some cases where we may\n      // never get an aborted event. For instance, if the network connection is lost and\n      // there were two requests, the first may have triggered an error immediately, while\n      // the second request remains unsent. In that case, the aborted algorithm will not\n      // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n      //\n      // We also can't rely on the ready state of the XHR, since the request that\n      // triggered the connection error may also show as a ready state of 0 (unsent).\n      // Therefore, we have to finish this group of requests immediately after the first\n      // seen error.\n\n      return doneFn(error, segment);\n    }\n\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      var segmentFinish = function segmentFinish() {\n        if (segment.encryptedBytes) {\n          return decryptSegment({\n            decryptionWorker: decryptionWorker,\n            segment: segment,\n            trackInfoFn: trackInfoFn,\n            timingInfoFn: timingInfoFn,\n            videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n            audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n            id3Fn: id3Fn,\n            captionsFn: captionsFn,\n            isEndOfTimeline: isEndOfTimeline,\n            endedTimelineFn: endedTimelineFn,\n            dataFn: dataFn,\n            doneFn: doneFn,\n            onTransmuxerLog: onTransmuxerLog\n          });\n        } // Otherwise, everything is ready just continue\n\n\n        handleSegmentBytes({\n          segment: segment,\n          bytes: segment.bytes,\n          trackInfoFn: trackInfoFn,\n          timingInfoFn: timingInfoFn,\n          videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n          audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n          id3Fn: id3Fn,\n          captionsFn: captionsFn,\n          isEndOfTimeline: isEndOfTimeline,\n          endedTimelineFn: endedTimelineFn,\n          dataFn: dataFn,\n          doneFn: doneFn,\n          onTransmuxerLog: onTransmuxerLog\n        });\n      }; // Keep track of when *all* of the requests have completed\n\n\n      segment.endOfAllRequests = Date.now();\n\n      if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {\n        return decrypt({\n          decryptionWorker: decryptionWorker,\n          // add -init to the \"id\" to differentiate between segment\n          // and init segment decryption, just in case they happen\n          // at the same time at some point in the future.\n          id: segment.requestId + '-init',\n          encryptedBytes: segment.map.encryptedBytes,\n          key: segment.map.key\n        }, function (decryptedBytes) {\n          segment.map.bytes = decryptedBytes;\n          parseInitSegment(segment, function (parseError) {\n            if (parseError) {\n              abortAll(activeXhrs);\n              return doneFn(parseError, segment);\n            }\n\n            segmentFinish();\n          });\n        });\n      }\n\n      segmentFinish();\n    }\n  };\n};\n/**\n * Calls the abort callback if any request within the batch was aborted. Will only call\n * the callback once per batch of requests, even if multiple were aborted.\n *\n * @param {Object} loadendState - state to check to see if the abort function was called\n * @param {Function} abortFn - callback to call for abort\n */\n\n\nvar handleLoadEnd = function handleLoadEnd(_ref10) {\n  var loadendState = _ref10.loadendState,\n      abortFn = _ref10.abortFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted && abortFn && !loadendState.calledAbortFn) {\n      abortFn();\n      loadendState.calledAbortFn = true;\n    }\n  };\n};\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n\nvar handleProgress = function handleProgress(_ref11) {\n  var segment = _ref11.segment,\n      progressFn = _ref11.progressFn;\n  _ref11.trackInfoFn;\n  _ref11.timingInfoFn;\n  _ref11.videoSegmentTimingInfoFn;\n  _ref11.audioSegmentTimingInfoFn;\n  _ref11.id3Fn;\n  _ref11.captionsFn;\n  _ref11.isEndOfTimeline;\n  _ref11.endedTimelineFn;\n  _ref11.dataFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted) {\n      return;\n    }\n\n    segment.stats = videojs.mergeOptions(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [transmuxer]: Object,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} abortFn - a callback called (only once) if any piece of a request was\n *                             aborted\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that receives data from the main segment's xhr\n *                            request, transmuxed if needed\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @return {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\n\n\nvar mediaSegmentRequest = function mediaSegmentRequest(_ref12) {\n  var xhr = _ref12.xhr,\n      xhrOptions = _ref12.xhrOptions,\n      decryptionWorker = _ref12.decryptionWorker,\n      segment = _ref12.segment,\n      abortFn = _ref12.abortFn,\n      progressFn = _ref12.progressFn,\n      trackInfoFn = _ref12.trackInfoFn,\n      timingInfoFn = _ref12.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref12.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref12.audioSegmentTimingInfoFn,\n      id3Fn = _ref12.id3Fn,\n      captionsFn = _ref12.captionsFn,\n      isEndOfTimeline = _ref12.isEndOfTimeline,\n      endedTimelineFn = _ref12.endedTimelineFn,\n      dataFn = _ref12.dataFn,\n      doneFn = _ref12.doneFn,\n      onTransmuxerLog = _ref12.onTransmuxerLog;\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion({\n    activeXhrs: activeXhrs,\n    decryptionWorker: decryptionWorker,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  }); // optionally, request the decryption key\n\n  if (segment.key && !segment.key.bytes) {\n    var objects = [segment.key];\n\n    if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {\n      objects.push(segment.map.key);\n    }\n\n    var keyRequestOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n    activeXhrs.push(keyXhr);\n  } // optionally, request the associated media init segment\n\n\n  if (segment.map && !segment.map.bytes) {\n    var differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);\n\n    if (differentMapKey) {\n      var mapKeyRequestOptions = videojs.mergeOptions(xhrOptions, {\n        uri: segment.map.key.resolvedUri,\n        responseType: 'arraybuffer'\n      });\n      var mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);\n      var mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);\n      activeXhrs.push(mapKeyXhr);\n    }\n\n    var initSegmentOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse({\n      segment: segment,\n      finishProcessingFn: finishProcessingFn\n    });\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = videojs.mergeOptions(xhrOptions, {\n    uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse({\n    segment: segment,\n    finishProcessingFn: finishProcessingFn,\n    responseType: segmentRequestOptions.responseType\n  });\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n  segmentXhr.addEventListener('progress', handleProgress({\n    segment: segment,\n    progressFn: progressFn,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn\n  }));\n  activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks\n  // multiple times, provide a shared state object\n\n  var loadendState = {};\n  activeXhrs.forEach(function (activeXhr) {\n    activeXhr.addEventListener('loadend', handleLoadEnd({\n      loadendState: loadendState,\n      abortFn: abortFn\n    }));\n  });\n  return function () {\n    return abortAll(activeXhrs);\n  };\n};\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n\n\nvar logFn$1 = logger('CodecUtils');\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n *\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return parseCodecs(mediaAttributes.CODECS);\n  }\n};\n\nvar isMaat = function isMaat(master, media) {\n  var mediaAttributes = media.attributes || {};\n  return master && master.mediaGroups && master.mediaGroups.AUDIO && mediaAttributes.AUDIO && master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n};\n\nvar isMuxed = function isMuxed(master, media) {\n  if (!isMaat(master, media)) {\n    return true;\n  }\n\n  var mediaAttributes = media.attributes || {};\n  var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n\n  for (var groupId in audioGroup) {\n    // If an audio group has a URI (the case for HLS, as HLS will use external playlists),\n    // or there are listed playlists (the case for DASH, as the manifest will have already\n    // provided all of the details necessary to generate the audio playlist, as opposed to\n    // HLS' externally requested playlists), then the content is demuxed.\n    if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n      return true;\n    }\n  }\n\n  return false;\n};\n\nvar unwrapCodecList = function unwrapCodecList(codecList) {\n  var codecs = {};\n  codecList.forEach(function (_ref) {\n    var mediaType = _ref.mediaType,\n        type = _ref.type,\n        details = _ref.details;\n    codecs[mediaType] = codecs[mediaType] || [];\n    codecs[mediaType].push(translateLegacyCodec(\"\" + type + details));\n  });\n  Object.keys(codecs).forEach(function (mediaType) {\n    if (codecs[mediaType].length > 1) {\n      logFn$1(\"multiple \" + mediaType + \" codecs found as attributes: \" + codecs[mediaType].join(', ') + \". Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.\");\n      codecs[mediaType] = null;\n      return;\n    }\n\n    codecs[mediaType] = codecs[mediaType][0];\n  });\n  return codecs;\n};\n\nvar codecCount = function codecCount(codecObj) {\n  var count = 0;\n\n  if (codecObj.audio) {\n    count++;\n  }\n\n  if (codecObj.video) {\n    count++;\n  }\n\n  return count;\n};\n/**\n * Calculates the codec strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty object will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Object} the codec strings.\n *\n * @private\n */\n\n\nvar codecsForPlaylist = function codecsForPlaylist(master, media) {\n  var mediaAttributes = media.attributes || {};\n  var codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n  if (isMaat(master, media) && !codecInfo.audio) {\n    if (!isMuxed(master, media)) {\n      // It is possible for codecs to be specified on the audio media group playlist but\n      // not on the rendition playlist. This is mostly the case for DASH, where audio and\n      // video are always separate (and separately specified).\n      var defaultCodecs = unwrapCodecList(codecsFromDefault(master, mediaAttributes.AUDIO) || []);\n\n      if (defaultCodecs.audio) {\n        codecInfo.audio = defaultCodecs.audio;\n      }\n    }\n  }\n\n  return codecInfo;\n};\n\nvar logFn = logger('PlaylistSelector');\n\nvar representationToString = function representationToString(representation) {\n  if (!representation || !representation.playlist) {\n    return;\n  }\n\n  var playlist = representation.playlist;\n  return JSON.stringify({\n    id: playlist.id,\n    bandwidth: representation.bandwidth,\n    width: representation.width,\n    height: representation.height,\n    codecs: playlist.attributes && playlist.attributes.CODECS || ''\n  });\n}; // Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  if (!el) {\n    return '';\n  }\n\n  var result = window$1.getComputedStyle(el);\n\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n\n    return cmp;\n  });\n};\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth;\n  var rightBandwidth;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n\n  leftBandwidth = leftBandwidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n\n  rightBandwidth = rightBandwidth || window$1.Number.MAX_VALUE;\n  return leftBandwidth - rightBandwidth;\n};\n/**\n * A comparator function to sort two playlist object by resolution (width).\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth;\n  var rightWidth;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window$1.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n\n  return leftWidth - rightWidth;\n};\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {number} playerWidth\n *        Current width of the player element (should account for the device pixel ratio)\n * @param {number} playerHeight\n *        Current height of the player element (should account for the device pixel ratio)\n * @param {boolean} limitRenditionByPlayerDimensions\n *        True if the player width and height should be used during the selection, false otherwise\n * @param {Object} masterPlaylistController\n *        the current masterPlaylistController object\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, masterPlaylistController) {\n  // If we end up getting called before `master` is available, exit early\n  if (!master) {\n    return;\n  }\n\n  var options = {\n    bandwidth: playerBandwidth,\n    width: playerWidth,\n    height: playerHeight,\n    limitRenditionByPlayerDimensions: limitRenditionByPlayerDimensions\n  };\n  var playlists = master.playlists; // if playlist is audio only, select between currently active audio group playlists.\n\n  if (Playlist.isAudioOnly(master)) {\n    playlists = masterPlaylistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true\n    // at the buttom of this function for debugging.\n\n    options.audioOnly = true;\n  } // convert the playlists to an intermediary representation to make comparisons easier\n\n\n  var sortedPlaylistReps = playlists.map(function (playlist) {\n    var bandwidth;\n    var width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    var height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;\n    bandwidth = bandwidth || window$1.Number.MAX_VALUE;\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  }); // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !Playlist.isIncompatible(rep.playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return Playlist.isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !Playlist.isDisabled(rep.playlist);\n    });\n  } // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n\n\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n  if (limitRenditionByPlayerDimensions === false) {\n    var _chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n    if (_chosenRep && _chosenRep.playlist) {\n      var type = 'sortedPlaylistReps';\n\n      if (bandwidthBestRep) {\n        type = 'bandwidthBestRep';\n      }\n\n      if (enabledPlaylistReps[0]) {\n        type = 'enabledPlaylistReps';\n      }\n\n      logFn(\"choosing \" + representationToString(_chosenRep) + \" using \" + type + \" with options\", options);\n      return _chosenRep.playlist;\n    }\n\n    logFn('could not choose a playlist with options', options);\n    return null;\n  } // filter out playlists without resolution information\n\n\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  }); // sort variants by resolution\n\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  }); // if we have the exact resolution as the player use it\n\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n  var resolutionPlusOneList;\n  var resolutionPlusOneSmallest;\n  var resolutionPlusOneRep; // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    }); // find all the variants have the same smallest resolution\n\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    }); // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  }\n\n  var leastPixelDiffRep; // If this selector proves to be better than others,\n  // resolutionPlusOneRep and resolutionBestRep and all\n  // the code involving them should be removed.\n\n  if (masterPlaylistController.experimentalLeastPixelDiffSelector) {\n    // find the variant that is closest to the player's pixel size\n    var leastPixelDiffList = haveResolution.map(function (rep) {\n      rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);\n      return rep;\n    }); // get the highest bandwidth, closest resolution playlist\n\n    stableSort(leastPixelDiffList, function (left, right) {\n      // sort by highest bandwidth if pixelDiff is the same\n      if (left.pixelDiff === right.pixelDiff) {\n        return right.bandwidth - left.bandwidth;\n      }\n\n      return left.pixelDiff - right.pixelDiff;\n    });\n    leastPixelDiffRep = leastPixelDiffList[0];\n  } // fallback chain of variants\n\n\n  var chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n  if (chosenRep && chosenRep.playlist) {\n    var _type = 'sortedPlaylistReps';\n\n    if (leastPixelDiffRep) {\n      _type = 'leastPixelDiffRep';\n    } else if (resolutionPlusOneRep) {\n      _type = 'resolutionPlusOneRep';\n    } else if (resolutionBestRep) {\n      _type = 'resolutionBestRep';\n    } else if (bandwidthBestRep) {\n      _type = 'bandwidthBestRep';\n    } else if (enabledPlaylistReps[0]) {\n      _type = 'enabledPlaylistReps';\n    }\n\n    logFn(\"choosing \" + representationToString(chosenRep) + \" using \" + _type + \" with options\", options);\n    return chosenRep.playlist;\n  }\n\n  logFn('could not choose a playlist with options', options);\n  return null;\n};\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n};\n/**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @param {number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\n\n\nvar movingAverageBandwidthSelector = function movingAverageBandwidthSelector(decay) {\n  var average = -1;\n  var lastSystemBandwidth = -1;\n\n  if (decay < 0 || decay > 1) {\n    throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n  }\n\n  return function () {\n    var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n\n    if (average < 0) {\n      average = this.systemBandwidth;\n      lastSystemBandwidth = this.systemBandwidth;\n    } // stop the average value from decaying for every 250ms\n    // when the systemBandwidth is constant\n    // and\n    // stop average from setting to a very low value when the\n    // systemBandwidth becomes 0 in case of chunk cancellation\n\n\n    if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {\n      average = decay * this.systemBandwidth + (1 - decay) * average;\n      lastSystemBandwidth = this.systemBandwidth;\n    }\n\n    return simpleSelector(this.playlists.master, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n  };\n};\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {number} settings.currentTime\n *        The current time of the player\n * @param {number} settings.bandwidth\n *        Current measured bandwidth\n * @param {number} settings.duration\n *        Duration of the media\n * @param {number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\n\n\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master,\n      currentTime = settings.currentTime,\n      bandwidth = settings.bandwidth,\n      duration = settings.duration,\n      segmentDuration = settings.segmentDuration,\n      timeUntilRebuffer = settings.timeUntilRebuffer,\n      currentTimeline = settings.currentTimeline,\n      syncController = settings.syncController; // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !Playlist.isIncompatible(playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !Playlist.isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  }); // Sort by bandwidth DESC\n\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n  return rebufferingEstimates[0] || null;\n};\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\n\n\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  var _this = this; // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n\n\n  var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  }); // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return !!codecsForPlaylist(_this.playlists.master, playlist).video;\n  });\n  return playlistsWithVideo[0] || null;\n};\n/**\n * Combine all segments into a single Uint8Array\n *\n * @param {Object} segmentObj\n * @return {Uint8Array} concatenated bytes\n * @private\n */\n\n\nvar concatSegments = function concatSegments(segmentObj) {\n  var offset = 0;\n  var tempBuffer;\n\n  if (segmentObj.bytes) {\n    tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array\n\n    segmentObj.segments.forEach(function (segment) {\n      tempBuffer.set(segment, offset);\n      offset += segment.byteLength;\n    });\n  }\n\n  return tempBuffer;\n};\n/**\n * @file text-tracks.js\n */\n\n/**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStream the caption stream to create\n * @private\n */\n\n\nvar createCaptionsTrackIfNotExists = function createCaptionsTrackIfNotExists(inbandTextTracks, tech, captionStream) {\n  if (!inbandTextTracks[captionStream]) {\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-608'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-608'\n    });\n    var instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them\n\n    if (/^cc708_/.test(captionStream)) {\n      instreamId = 'SERVICE' + captionStream.split('_')[1];\n    }\n\n    var track = tech.textTracks().getTrackById(instreamId);\n\n    if (track) {\n      // Resuse an existing track with a CC# id because this was\n      // very likely created by videojs-contrib-hls from information\n      // in the m3u8 for us to use\n      inbandTextTracks[captionStream] = track;\n    } else {\n      // This section gets called when we have caption services that aren't specified in the manifest.\n      // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.\n      var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n      var label = captionStream;\n      var language = captionStream;\n      var def = false;\n      var captionService = captionServices[instreamId];\n\n      if (captionService) {\n        label = captionService.label;\n        language = captionService.language;\n        def = captionService[\"default\"];\n      } // Otherwise, create a track with the default `CC#` label and\n      // without a language\n\n\n      inbandTextTracks[captionStream] = tech.addRemoteTextTrack({\n        kind: 'captions',\n        id: instreamId,\n        // TODO: investigate why this doesn't seem to turn the caption on by default\n        \"default\": def,\n        label: label,\n        language: language\n      }, false).track;\n    }\n  }\n};\n/**\n * Add caption text track data to a source handler given an array of captions\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {Array} captionArray an array of caption data\n * @private\n */\n\n\nvar addCaptionData = function addCaptionData(_ref) {\n  var inbandTextTracks = _ref.inbandTextTracks,\n      captionArray = _ref.captionArray,\n      timestampOffset = _ref.timestampOffset;\n\n  if (!captionArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  captionArray.forEach(function (caption) {\n    var track = caption.stream;\n    inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));\n  });\n};\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\n\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n/**\n * Add metadata text track data to a source handler given an array of metadata\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {Array} metadataArray an array of meta data\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {number} videoDuration the duration of the video\n * @private\n */\n\n\nvar addMetadata = function addMetadata(_ref2) {\n  var inbandTextTracks = _ref2.inbandTextTracks,\n      metadataArray = _ref2.metadataArray,\n      timestampOffset = _ref2.timestampOffset,\n      videoDuration = _ref2.videoDuration;\n\n  if (!metadataArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  var metadataTrack = inbandTextTracks.metadataTrack_;\n\n  if (!metadataTrack) {\n    return;\n  }\n\n  metadataArray.forEach(function (metadata) {\n    var time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n    // ignore this bit of metadata.\n    // This likely occurs when you have an non-timed ID3 tag like TIT2,\n    // which is the \"Title/Songname/Content description\" frame\n\n    if (typeof time !== 'number' || window$1.isNaN(time) || time < 0 || !(time < Infinity)) {\n      return;\n    }\n\n    metadata.frames.forEach(function (frame) {\n      var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n      cue.frame = frame;\n      cue.value = frame;\n      deprecateOldCue(cue);\n      metadataTrack.addCue(cue);\n    });\n  });\n\n  if (!metadataTrack.cues || !metadataTrack.cues.length) {\n    return;\n  } // Updating the metadeta cues so that\n  // the endTime of each cue is the startTime of the next cue\n  // the endTime of last cue is the duration of the video\n\n\n  var cues = metadataTrack.cues;\n  var cuesArray = []; // Create a copy of the TextTrackCueList...\n  // ...disregarding cues with a falsey value\n\n  for (var i = 0; i < cues.length; i++) {\n    if (cues[i]) {\n      cuesArray.push(cues[i]);\n    }\n  } // Group cues by their startTime value\n\n\n  var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n    var timeSlot = obj[cue.startTime] || [];\n    timeSlot.push(cue);\n    obj[cue.startTime] = timeSlot;\n    return obj;\n  }, {}); // Sort startTimes by ascending order\n\n  var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n    return Number(a) - Number(b);\n  }); // Map each cue group's endTime to the next group's startTime\n\n  sortedStartTimes.forEach(function (startTime, idx) {\n    var cueGroup = cuesGroupedByStartTime[startTime];\n    var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n    cueGroup.forEach(function (cue) {\n      cue.endTime = nextTime;\n    });\n  });\n};\n/**\n * Create metadata text track on video.js if it does not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {string} dispatchType the inband metadata track dispatch type\n * @param {Object} tech the video.js tech\n * @private\n */\n\n\nvar createMetadataTrackIfNotExists = function createMetadataTrackIfNotExists(inbandTextTracks, dispatchType, tech) {\n  if (inbandTextTracks.metadataTrack_) {\n    return;\n  }\n\n  inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({\n    kind: 'metadata',\n    label: 'Timed Metadata'\n  }, false).track;\n  inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;\n};\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\n\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i;\n  var cue;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i]; // Remove any cue within the provided start and end time\n\n    if (cue.startTime >= start && cue.endTime <= end) {\n      track.removeCue(cue);\n    }\n  }\n};\n/**\n * Remove duplicate cues from a track on video.js (a cue is considered a\n * duplicate if it has the same time interval and text as another)\n *\n * @param {Object} track the text track to remove the duplicate cues from\n * @private\n */\n\n\nvar removeDuplicateCuesFromTrack = function removeDuplicateCuesFromTrack(track) {\n  var cues = track.cues;\n\n  if (!cues) {\n    return;\n  }\n\n  for (var i = 0; i < cues.length; i++) {\n    var duplicates = [];\n    var occurrences = 0;\n\n    for (var j = 0; j < cues.length; j++) {\n      if (cues[i].startTime === cues[j].startTime && cues[i].endTime === cues[j].endTime && cues[i].text === cues[j].text) {\n        occurrences++;\n\n        if (occurrences > 1) {\n          duplicates.push(cues[j]);\n        }\n      }\n    }\n\n    if (duplicates.length) {\n      duplicates.forEach(function (dupe) {\n        return track.removeCue(dupe);\n      });\n    }\n  }\n};\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {number} currentTime\n *        The current time\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\n\n\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, currentTime, mapping) {\n  if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n    return [];\n  } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n\n  var currentTimePts = Math.ceil((currentTime - mapping + 3) * ONE_SECOND_IN_TS);\n  var i;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\n\n\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\n\n\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * ONE_SECOND_IN_TS);\n  var endPts = Math.ceil((end - mapping) * ONE_SECOND_IN_TS);\n  var updatedBuffer = buffer.slice();\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  } // clamp remove range start to 0 index\n\n\n  j = Math.max(j, 0);\n  updatedBuffer.splice(j, i - j + 1);\n  return updatedBuffer;\n};\n\nvar shallowEqual = function shallowEqual(a, b) {\n  // if both are undefined\n  // or one or the other is undefined\n  // they are not equal\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // they are the same object and thus, equal\n\n\n  if (a === b) {\n    return true;\n  } // sort keys so we can make sure they have\n  // all the same keys later.\n\n\n  var akeys = Object.keys(a).sort();\n  var bkeys = Object.keys(b).sort(); // different number of keys, not equal\n\n  if (akeys.length !== bkeys.length) {\n    return false;\n  }\n\n  for (var i = 0; i < akeys.length; i++) {\n    var key = akeys[i]; // different sorted keys, not equal\n\n    if (key !== bkeys[i]) {\n      return false;\n    } // different values, not equal\n\n\n    if (a[key] !== b[key]) {\n      return false;\n    }\n  }\n\n  return true;\n}; // https://www.w3.org/TR/WebIDL-1/#quotaexceedederror\n\n\nvar QUOTA_EXCEEDED_ERR = 22;\n/**\n * The segment loader has no recourse except to fetch a segment in the\n * current playlist and use the internal timestamps in that segment to\n * generate a syncPoint. This function returns a good candidate index\n * for that process.\n *\n * @param {Array} segments - the segments array from a playlist.\n * @return {number} An index of a segment from the playlist to load\n */\n\nvar getSyncSegmentCandidate = function getSyncSegmentCandidate(currentTimeline, segments, targetTime) {\n  segments = segments || [];\n  var timelineSegments = [];\n  var time = 0;\n\n  for (var i = 0; i < segments.length; i++) {\n    var segment = segments[i];\n\n    if (currentTimeline === segment.timeline) {\n      timelineSegments.push(i);\n      time += segment.duration;\n\n      if (time > targetTime) {\n        return i;\n      }\n    }\n  }\n\n  if (timelineSegments.length === 0) {\n    return 0;\n  } // default to the last timeline segment\n\n\n  return timelineSegments[timelineSegments.length - 1];\n}; // In the event of a quota exceeded error, keep at least one second of back buffer. This\n// number was arbitrarily chosen and may be updated in the future, but seemed reasonable\n// as a start to prevent any potential issues with removing content too close to the\n// playhead.\n\n\nvar MIN_BACK_BUFFER = 1; // in ms\n\nvar CHECK_BUFFER_DELAY = 500;\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n}; // With most content hovering around 30fps, if a segment has a duration less than a half\n// frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will\n// not accurately reflect the rest of the content.\n\n\nvar MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;\n\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, trackInfo) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !trackInfo) {\n    return null;\n  }\n\n  if (!trackInfo.hasAudio && !trackInfo.hasVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.hasVideo && !trackInfo.hasVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.hasVideo && trackInfo.hasVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n/**\n * Calculates a time value that is safe to remove from the back buffer without interrupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {number} currentTime\n *        The current time of the player\n * @param {number} targetDuration\n *        The target duration of the current playlist\n * @return {number}\n *         Time that is safe to remove from the back buffer without interrupting playback\n */\n\n\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable, currentTime, targetDuration) {\n  // 30 seconds before the playhead provides a safe default for trimming.\n  //\n  // Choosing a reasonable default is particularly important for high bitrate content and\n  // VOD videos/live streams with large windows, as the buffer may end up overfilled and\n  // throw an APPEND_BUFFER_ERR.\n  var trimTime = currentTime - Config.BACK_BUFFER_LENGTH;\n\n  if (seekable.length) {\n    // Some live playlists may have a shorter window of content than the full allowed back\n    // buffer. For these playlists, don't save content that's no longer within the window.\n    trimTime = Math.max(trimTime, seekable.start(0));\n  } // Don't remove within target duration of the current time to avoid the possibility of\n  // removing the GOP currently being played, as removing it can cause playback stalls.\n\n\n  var maxTrimTime = currentTime - targetDuration;\n  return Math.min(maxTrimTime, trimTime);\n};\n\nvar segmentInfoString = function segmentInfoString(segmentInfo) {\n  var startOfSegment = segmentInfo.startOfSegment,\n      duration = segmentInfo.duration,\n      segment = segmentInfo.segment,\n      part = segmentInfo.part,\n      _segmentInfo$playlist = segmentInfo.playlist,\n      seq = _segmentInfo$playlist.mediaSequence,\n      id = _segmentInfo$playlist.id,\n      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,\n      segments = _segmentInfo$playlist2 === void 0 ? [] : _segmentInfo$playlist2,\n      index = segmentInfo.mediaIndex,\n      partIndex = segmentInfo.partIndex,\n      timeline = segmentInfo.timeline;\n  var segmentLen = segments.length - 1;\n  var selection = 'mediaIndex/partIndex increment';\n\n  if (segmentInfo.getMediaInfoForTime) {\n    selection = \"getMediaInfoForTime (\" + segmentInfo.getMediaInfoForTime + \")\";\n  } else if (segmentInfo.isSyncRequest) {\n    selection = 'getSyncSegmentCandidate (isSyncRequest)';\n  }\n\n  if (segmentInfo.independent) {\n    selection += \" with independent \" + segmentInfo.independent;\n  }\n\n  var hasPartIndex = typeof partIndex === 'number';\n  var name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';\n  var zeroBasedPartCount = hasPartIndex ? getKnownPartCount({\n    preloadSegment: segment\n  }) - 1 : 0;\n  return name + \" [\" + (seq + index) + \"/\" + (seq + segmentLen) + \"]\" + (hasPartIndex ? \" part [\" + partIndex + \"/\" + zeroBasedPartCount + \"]\" : '') + (\" segment start/end [\" + segment.start + \" => \" + segment.end + \"]\") + (hasPartIndex ? \" part start/end [\" + part.start + \" => \" + part.end + \"]\" : '') + (\" startOfSegment [\" + startOfSegment + \"]\") + (\" duration [\" + duration + \"]\") + (\" timeline [\" + timeline + \"]\") + (\" selected by [\" + selection + \"]\") + (\" playlist [\" + id + \"]\");\n};\n\nvar timingInfoPropertyForMedia = function timingInfoPropertyForMedia(mediaType) {\n  return mediaType + \"TimingInfo\";\n};\n/**\n * Returns the timestamp offset to use for the segment.\n *\n * @param {number} segmentTimeline\n *        The timeline of the segment\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} startOfSegment\n *        The estimated segment start\n * @param {TimeRange[]} buffered\n *        The loader's buffer\n * @param {boolean} overrideCheck\n *        If true, no checks are made to see if the timestamp offset value should be set,\n *        but sets it directly to a value.\n *\n * @return {number|null}\n *         Either a number representing a new timestamp offset, or null if the segment is\n *         part of the same timeline\n */\n\n\nvar timestampOffsetForSegment = function timestampOffsetForSegment(_ref) {\n  var segmentTimeline = _ref.segmentTimeline,\n      currentTimeline = _ref.currentTimeline,\n      startOfSegment = _ref.startOfSegment,\n      buffered = _ref.buffered,\n      overrideCheck = _ref.overrideCheck; // Check to see if we are crossing a discontinuity to see if we need to set the\n  // timestamp offset on the transmuxer and source buffer.\n  //\n  // Previously, we changed the timestampOffset if the start of this segment was less than\n  // the currently set timestampOffset, but this isn't desirable as it can produce bad\n  // behavior, especially around long running live streams.\n\n  if (!overrideCheck && segmentTimeline === currentTimeline) {\n    return null;\n  } // When changing renditions, it's possible to request a segment on an older timeline. For\n  // instance, given two renditions with the following:\n  //\n  // #EXTINF:10\n  // segment1\n  // #EXT-X-DISCONTINUITY\n  // #EXTINF:10\n  // segment2\n  // #EXTINF:10\n  // segment3\n  //\n  // And the current player state:\n  //\n  // current time: 8\n  // buffer: 0 => 20\n  //\n  // The next segment on the current rendition would be segment3, filling the buffer from\n  // 20s onwards. However, if a rendition switch happens after segment2 was requested,\n  // then the next segment to be requested will be segment1 from the new rendition in\n  // order to fill time 8 and onwards. Using the buffered end would result in repeated\n  // content (since it would position segment1 of the new rendition starting at 20s). This\n  // case can be identified when the new segment's timeline is a prior value. Instead of\n  // using the buffered end, the startOfSegment can be used, which, hopefully, will be\n  // more accurate to the actual start time of the segment.\n\n\n  if (segmentTimeline < currentTimeline) {\n    return startOfSegment;\n  } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that\n  // value uses the end of the last segment if it is available. While this value\n  // should often be correct, it's better to rely on the buffered end, as the new\n  // content post discontinuity should line up with the buffered end as if it were\n  // time 0 for the new content.\n\n\n  return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;\n};\n/**\n * Returns whether or not the loader should wait for a timeline change from the timeline\n * change controller before processing the segment.\n *\n * Primary timing in VHS goes by video. This is different from most media players, as\n * audio is more often used as the primary timing source. For the foreseeable future, VHS\n * will continue to use video as the primary timing source, due to the current logic and\n * expectations built around it.\n\n * Since the timing follows video, in order to maintain sync, the video loader is\n * responsible for setting both audio and video source buffer timestamp offsets.\n *\n * Setting different values for audio and video source buffers could lead to\n * desyncing. The following examples demonstrate some of the situations where this\n * distinction is important. Note that all of these cases involve demuxed content. When\n * content is muxed, the audio and video are packaged together, therefore syncing\n * separate media playlists is not an issue.\n *\n * CASE 1: Audio prepares to load a new timeline before video:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:                     ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader              ^\n *\n * In the above example, the audio loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the video loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the audio loader goes ahead and loads and appends the 6th segment before the video\n * loader crosses the discontinuity, then when appended, the 6th audio segment will use\n * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,\n * the audio loader must provide the audioAppendStart value to trim the content in the\n * transmuxer, and that value relies on the audio timestamp offset. Since the audio\n * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the\n * segment until that value is provided.\n *\n * CASE 2: Video prepares to load a new timeline before audio:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:             ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader                      ^\n *\n * In the above example, the video loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the audio loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the video loader goes ahead and loads and appends the 6th segment, then once the\n * segment is loaded and processed, both the video and audio timestamp offsets will be\n * set, since video is used as the primary timing source. This is to ensure content lines\n * up appropriately, as any modifications to the video timing are reflected by audio when\n * the video loader sets the audio and video timestamp offsets to the same value. However,\n * setting the timestamp offset for audio before audio has had a chance to change\n * timelines will likely lead to desyncing, as the audio loader will append segment 5 with\n * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.\n *\n * CASE 3: When seeking, audio prepares to load a new timeline before video\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:           ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader            ^\n *\n * In the above example, both audio and video loaders are loading segments from timeline\n * 0, but imagine that the seek originated from timeline 1.\n *\n * When seeking to a new timeline, the timestamp offset will be set based on the expected\n * segment start of the loaded video segment. In order to maintain sync, the audio loader\n * must wait for the video loader to load its segment and update both the audio and video\n * timestamp offsets before it may load and append its own segment. This is the case\n * whether the seek results in a mismatched segment request (e.g., the audio loader\n * chooses to load segment 3 and the video loader chooses to load segment 4) or the\n * loaders choose to load the same segment index from each playlist, as the segments may\n * not be aligned perfectly, even for matching segment indexes.\n *\n * @param {Object} timelinechangeController\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} segmentTimeline\n *        The timeline of the segment being loaded\n * @param {('main'|'audio')} loaderType\n *        The loader type\n * @param {boolean} audioDisabled\n *        Whether the audio is disabled for the loader. This should only be true when the\n *        loader may have muxed audio in its segment, but should not append it, e.g., for\n *        the main loader when an alternate audio playlist is active.\n *\n * @return {boolean}\n *         Whether the loader should wait for a timeline change from the timeline change\n *         controller before processing the segment\n */\n\n\nvar shouldWaitForTimelineChange = function shouldWaitForTimelineChange(_ref2) {\n  var timelineChangeController = _ref2.timelineChangeController,\n      currentTimeline = _ref2.currentTimeline,\n      segmentTimeline = _ref2.segmentTimeline,\n      loaderType = _ref2.loaderType,\n      audioDisabled = _ref2.audioDisabled;\n\n  if (currentTimeline === segmentTimeline) {\n    return false;\n  }\n\n  if (loaderType === 'audio') {\n    var lastMainTimelineChange = timelineChangeController.lastTimelineChange({\n      type: 'main'\n    }); // Audio loader should wait if:\n    //\n    // * main hasn't had a timeline change yet (thus has not loaded its first segment)\n    // * main hasn't yet changed to the timeline audio is looking to load\n\n    return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;\n  } // The main loader only needs to wait for timeline changes if there's demuxed audio.\n  // Otherwise, there's nothing to wait for, since audio would be muxed into the main\n  // loader's segments (or the content is audio/video only and handled by the main\n  // loader).\n\n\n  if (loaderType === 'main' && audioDisabled) {\n    var pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({\n      type: 'audio'\n    }); // Main loader should wait for the audio loader if audio is not pending a timeline\n    // change to the current timeline.\n    //\n    // Since the main loader is responsible for setting the timestamp offset for both\n    // audio and video, the main loader must wait for audio to be about to change to its\n    // timeline before setting the offset, otherwise, if audio is behind in loading,\n    // segments from the previous timeline would be adjusted by the new timestamp offset.\n    //\n    // This requirement means that video will not cross a timeline until the audio is\n    // about to cross to it, so that way audio and video will always cross the timeline\n    // together.\n    //\n    // In addition to normal timeline changes, these rules also apply to the start of a\n    // stream (going from a non-existent timeline, -1, to timeline 0). It's important\n    // that these rules apply to the first timeline change because if they did not, it's\n    // possible that the main loader will cross two timelines before the audio loader has\n    // crossed one. Logic may be implemented to handle the startup as a special case, but\n    // it's easier to simply treat all timeline changes the same.\n\n    if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {\n      return false;\n    }\n\n    return true;\n  }\n\n  return false;\n};\n\nvar mediaDuration = function mediaDuration(timingInfos) {\n  var maxDuration = 0;\n  ['video', 'audio'].forEach(function (type) {\n    var typeTimingInfo = timingInfos[type + \"TimingInfo\"];\n\n    if (!typeTimingInfo) {\n      return;\n    }\n\n    var start = typeTimingInfo.start,\n        end = typeTimingInfo.end;\n    var duration;\n\n    if (typeof start === 'bigint' || typeof end === 'bigint') {\n      duration = window$1.BigInt(end) - window$1.BigInt(start);\n    } else if (typeof start === 'number' && typeof end === 'number') {\n      duration = end - start;\n    }\n\n    if (typeof duration !== 'undefined' && duration > maxDuration) {\n      maxDuration = duration;\n    }\n  }); // convert back to a number if it is lower than MAX_SAFE_INTEGER\n  // as we only need BigInt when we are above that.\n\n  if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {\n    maxDuration = Number(maxDuration);\n  }\n\n  return maxDuration;\n};\n\nvar segmentTooLong = function segmentTooLong(_ref3) {\n  var segmentDuration = _ref3.segmentDuration,\n      maxDuration = _ref3.maxDuration; // 0 duration segments are most likely due to metadata only segments or a lack of\n  // information.\n\n  if (!segmentDuration) {\n    return false;\n  } // For HLS:\n  //\n  // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1\n  // The EXTINF duration of each Media Segment in the Playlist\n  // file, when rounded to the nearest integer, MUST be less than or equal\n  // to the target duration; longer segments can trigger playback stalls\n  // or other errors.\n  //\n  // For DASH, the mpd-parser uses the largest reported segment duration as the target\n  // duration. Although that reported duration is occasionally approximate (i.e., not\n  // exact), a strict check may report that a segment is too long more often in DASH.\n\n\n  return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;\n};\n\nvar getTroublesomeSegmentDurationMessage = function getTroublesomeSegmentDurationMessage(segmentInfo, sourceType) {\n  // Right now we aren't following DASH's timing model exactly, so only perform\n  // this check for HLS content.\n  if (sourceType !== 'hls') {\n    return null;\n  }\n\n  var segmentDuration = mediaDuration({\n    audioTimingInfo: segmentInfo.audioTimingInfo,\n    videoTimingInfo: segmentInfo.videoTimingInfo\n  }); // Don't report if we lack information.\n  //\n  // If the segment has a duration of 0 it is either a lack of information or a\n  // metadata only segment and shouldn't be reported here.\n\n  if (!segmentDuration) {\n    return null;\n  }\n\n  var targetDuration = segmentInfo.playlist.targetDuration;\n  var isSegmentWayTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration * 2\n  });\n  var isSegmentSlightlyTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration\n  });\n  var segmentTooLongMessage = \"Segment with index \" + segmentInfo.mediaIndex + \" \" + (\"from playlist \" + segmentInfo.playlist.id + \" \") + (\"has a duration of \" + segmentDuration + \" \") + (\"when the reported duration is \" + segmentInfo.duration + \" \") + (\"and the target duration is \" + targetDuration + \". \") + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';\n\n  if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {\n    return {\n      severity: isSegmentWayTooLong ? 'warn' : 'info',\n      message: segmentTooLongMessage\n    };\n  }\n\n  return null;\n};\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar SegmentLoader = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings, options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // check pre-conditions\n\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    } // public properties\n\n\n    _this.bandwidth = settings.bandwidth;\n    _this.throughput = {\n      rate: 0,\n      count: 0\n    };\n    _this.roundTrip = NaN;\n\n    _this.resetStats_();\n\n    _this.mediaIndex = null;\n    _this.partIndex = null; // private settings\n\n    _this.hasPlayed_ = settings.hasPlayed;\n    _this.currentTime_ = settings.currentTime;\n    _this.seekable_ = settings.seekable;\n    _this.seeking_ = settings.seeking;\n    _this.duration_ = settings.duration;\n    _this.mediaSource_ = settings.mediaSource;\n    _this.vhs_ = settings.vhs;\n    _this.loaderType_ = settings.loaderType;\n    _this.currentMediaInfo_ = void 0;\n    _this.startingMediaInfo_ = void 0;\n    _this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    _this.goalBufferLength_ = settings.goalBufferLength;\n    _this.sourceType_ = settings.sourceType;\n    _this.sourceUpdater_ = settings.sourceUpdater;\n    _this.inbandTextTracks_ = settings.inbandTextTracks;\n    _this.state_ = 'INIT';\n    _this.timelineChangeController_ = settings.timelineChangeController;\n    _this.shouldSaveSegmentTimingInfo_ = true;\n    _this.parse708captions_ = settings.parse708captions;\n    _this.useDtsForTimestampOffset_ = settings.useDtsForTimestampOffset;\n    _this.captionServices_ = settings.captionServices;\n    _this.experimentalExactManifestTimings = settings.experimentalExactManifestTimings; // private instance variables\n\n    _this.checkBufferTimeout_ = null;\n    _this.error_ = void 0;\n    _this.currentTimeline_ = -1;\n    _this.pendingSegment_ = null;\n    _this.xhrOptions_ = null;\n    _this.pendingSegments_ = [];\n    _this.audioDisabled_ = false;\n    _this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller\n\n    _this.gopBuffer_ = [];\n    _this.timeMapping_ = 0;\n    _this.safeAppend_ = videojs.browser.IE_VERSION >= 11;\n    _this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    _this.playlistOfLastInitSegment_ = {\n      audio: null,\n      video: null\n    };\n    _this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough\n    // information yet to start the loading process (e.g., if the audio loader wants to\n    // load a segment from the next timeline but the main loader hasn't yet crossed that\n    // timeline), then the load call will be added to the queue until it is ready to be\n    // processed.\n\n    _this.loadQueue_ = [];\n    _this.metadataQueue_ = {\n      id3: [],\n      caption: []\n    };\n    _this.waitingOnRemove_ = false;\n    _this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback\n\n    _this.activeInitSegmentId_ = null;\n    _this.initSegments_ = {}; // HLSe playback\n\n    _this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n    _this.keyCache_ = {};\n    _this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n\n    _this.syncController_ = settings.syncController;\n    _this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n    _this.transmuxer_ = _this.createTransmuxer_();\n\n    _this.triggerSyncInfoUpdate_ = function () {\n      return _this.trigger('syncinfoupdate');\n    };\n\n    _this.syncController_.on('syncinfoupdate', _this.triggerSyncInfoUpdate_);\n\n    _this.mediaSource_.addEventListener('sourceopen', function () {\n      if (!_this.isEndOfStream_()) {\n        _this.ended_ = false;\n      }\n    }); // ...for determining the fetch location\n\n\n    _this.fetchAtBuffer_ = false;\n    _this.logger_ = logger(\"SegmentLoader[\" + _this.loaderType_ + \"]\");\n    Object.defineProperty(_assertThisInitialized(_this), 'state', {\n      get: function get() {\n        return this.state_;\n      },\n      set: function set(newState) {\n        if (newState !== this.state_) {\n          this.logger_(this.state_ + \" -> \" + newState);\n          this.state_ = newState;\n          this.trigger('statechange');\n        }\n      }\n    });\n\n    _this.sourceUpdater_.on('ready', function () {\n      if (_this.hasEnoughInfoToAppend_()) {\n        _this.processCallQueue_();\n      }\n    }); // Only the main loader needs to listen for pending timeline changes, as the main\n    // loader should wait for audio to be ready to change its timeline so that both main\n    // and audio timelines change together. For more details, see the\n    // shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'main') {\n      _this.timelineChangeController_.on('pendingtimelinechange', function () {\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    } // The main loader only listens on pending timeline changes, but the audio loader,\n    // since its loads follow main, needs to listen on timeline changes. For more details,\n    // see the shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'audio') {\n      _this.timelineChangeController_.on('timelinechange', function () {\n        if (_this.hasEnoughInfoToLoad_()) {\n          _this.processLoadQueue_();\n        }\n\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    }\n\n    return _this;\n  }\n\n  var _proto = SegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    return segmentTransmuxer.createTransmuxer({\n      remux: false,\n      alignGopsAtEnd: this.safeAppend_,\n      keepOriginalTimestamps: true,\n      parse708captions: this.parse708captions_,\n      captionServices: this.captionServices_\n    });\n  }\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetStats_ = function resetStats_() {\n    this.mediaBytesTransferred = 0;\n    this.mediaRequests = 0;\n    this.mediaRequestsAborted = 0;\n    this.mediaRequestsTimedout = 0;\n    this.mediaRequestsErrored = 0;\n    this.mediaTransferDuration = 0;\n    this.mediaSecondsLoaded = 0;\n    this.mediaAppends = 0;\n  }\n  /**\n   * dispose of the SegmentLoader and reset to the default state\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.state = 'DISPOSED';\n    this.pause();\n    this.abort_();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.terminate();\n    }\n\n    this.resetStats_();\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    if (this.syncController_ && this.triggerSyncInfoUpdate_) {\n      this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);\n    }\n\n    this.off();\n  };\n\n  _proto.setAudio = function setAudio(enable) {\n    this.audioDisabled_ = !enable;\n\n    if (enable) {\n      this.appendInitSegment_.audio = true;\n    } else {\n      // remove current track audio if it gets disabled\n      this.sourceUpdater_.removeAudio(0, this.duration_());\n    }\n  }\n  /**\n   * abort anything that is currently doing on with the SegmentLoader\n   * and reset to a default state\n   */\n  ;\n\n  _proto.abort = function abort() {\n    if (this.state !== 'WAITING') {\n      if (this.pendingSegment_) {\n        this.pendingSegment_ = null;\n      }\n\n      return;\n    }\n\n    this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n    // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n    // when the request is aborted. This will prevent the loader from being stuck in the\n    // WAITING state indefinitely.\n\n    this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n    // next segment\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * abort all pending xhr requests and null any pending segements\n   *\n   * @private\n   */\n  ;\n\n  _proto.abort_ = function abort_() {\n    if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {\n      this.pendingSegment_.abortRequests();\n    } // clear out the segment being processed\n\n\n    this.pendingSegment_ = null;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);\n    this.waitingOnRemove_ = false;\n    window$1.clearTimeout(this.quotaExceededErrorRetryTimeout_);\n    this.quotaExceededErrorRetryTimeout_ = null;\n  };\n\n  _proto.checkForAbort_ = function checkForAbort_(requestId) {\n    // If the state is APPENDING, then aborts will not modify the state, meaning the first\n    // callback that happens should reset the state to READY so that loading can continue.\n    if (this.state === 'APPENDING' && !this.pendingSegment_) {\n      this.state = 'READY';\n      return true;\n    }\n\n    if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * set an error on the segment loader and null out any pending segements\n   *\n   * @param {Error} error the error to set on the SegmentLoader\n   * @return {Error} the error that was set or that is currently set\n   */\n  ;\n\n  _proto.error = function error(_error) {\n    if (typeof _error !== 'undefined') {\n      this.logger_('error occurred:', _error);\n      this.error_ = _error;\n    }\n\n    this.pendingSegment_ = null;\n    return this.error_;\n  };\n\n  _proto.endOfStream = function endOfStream() {\n    this.ended_ = true;\n\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.gopBuffer_.length = 0;\n    this.pause();\n    this.trigger('ended');\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    var trackInfo = this.getMediaInfo_();\n\n    if (!this.sourceUpdater_ || !trackInfo) {\n      return videojs.createTimeRanges();\n    }\n\n    if (this.loaderType_ === 'main') {\n      var hasAudio = trackInfo.hasAudio,\n          hasVideo = trackInfo.hasVideo,\n          isMuxed = trackInfo.isMuxed;\n\n      if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {\n        return this.sourceUpdater_.buffered();\n      }\n\n      if (hasVideo) {\n        return this.sourceUpdater_.videoBuffered();\n      }\n    } // One case that can be ignored for now is audio only with alt audio,\n    // as we don't yet have proper support for that.\n\n\n    return this.sourceUpdater_.audioBuffered();\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: map.bytes,\n        tracks: map.tracks,\n        timescales: map.timescales\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Gets and sets key for the provided key\n   *\n   * @param {Object} key\n   *        The key object representing the key to get or set\n   * @param {boolean=} set\n   *        If true, the key for the provided key should be saved\n   * @return {Object}\n   *         Key object for desired key\n   */\n  ;\n\n  _proto.segmentKey = function segmentKey(key, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!key) {\n      return null;\n    }\n\n    var id = segmentKeyId(key);\n    var storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n    if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {\n      this.keyCache_[id] = storedKey = {\n        resolvedUri: key.resolvedUri,\n        bytes: key.bytes\n      };\n    }\n\n    var result = {\n      resolvedUri: (storedKey || key).resolvedUri\n    };\n\n    if (storedKey) {\n      result.bytes = storedKey.bytes;\n    }\n\n    return result;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && !this.paused();\n  }\n  /**\n   * load a playlist and start to fill the buffer\n   */\n  ;\n\n  _proto.load = function load() {\n    // un-pause\n    this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n    // specified\n\n    if (!this.playlist_) {\n      return;\n    } // if all the configuration is ready, initialize and begin loading\n\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    } // if we're in the middle of processing a segment already, don't\n    // kick off an additional segment request\n\n\n    if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n      return;\n    }\n\n    this.state = 'READY';\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old\n    // audio data from the muxed content should be removed\n\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * set a playlist on the segment loader\n   *\n   * @param {PlaylistLoader} media the playlist to set on the segment loader\n   */\n  ;\n\n  _proto.playlist = function playlist(newPlaylist, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!newPlaylist) {\n      return;\n    }\n\n    var oldPlaylist = this.playlist_;\n    var segmentInfo = this.pendingSegment_;\n    this.playlist_ = newPlaylist;\n    this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n    // is always our zero-time so force a sync update each time the playlist\n    // is refreshed from the server\n    //\n    // Use the INIT state to determine if playback has started, as the playlist sync info\n    // should be fixed once requests begin (as sync points are generated based on sync\n    // info), but not before then.\n\n    if (this.state === 'INIT') {\n      newPlaylist.syncInfo = {\n        mediaSequence: newPlaylist.mediaSequence,\n        time: 0\n      }; // Setting the date time mapping means mapping the program date time (if available)\n      // to time 0 on the player's timeline. The playlist's syncInfo serves a similar\n      // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can\n      // be updated as the playlist is refreshed before the loader starts loading, the\n      // program date time mapping needs to be updated as well.\n      //\n      // This mapping is only done for the main loader because a program date time should\n      // map equivalently between playlists.\n\n      if (this.loaderType_ === 'main') {\n        this.syncController_.setDateTimeMappingForStart(newPlaylist);\n      }\n    }\n\n    var oldId = null;\n\n    if (oldPlaylist) {\n      if (oldPlaylist.id) {\n        oldId = oldPlaylist.id;\n      } else if (oldPlaylist.uri) {\n        oldId = oldPlaylist.uri;\n      }\n    }\n\n    this.logger_(\"playlist update [\" + oldId + \" => \" + (newPlaylist.id || newPlaylist.uri) + \"]\"); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n    // in LIVE, we always want to update with new playlists (including refreshes)\n\n    this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    }\n\n    if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n      if (this.mediaIndex !== null) {\n        // we must reset/resync the segment loader when we switch renditions and\n        // the segment loader is already synced to the previous rendition\n        // on playlist changes we want it to be possible to fetch\n        // at the buffer for vod but not for live. So we use resetLoader\n        // for live and resyncLoader for vod. We want this because\n        // if a playlist uses independent and non-independent segments/parts the\n        // buffer may not accurately reflect the next segment that we should try\n        // downloading.\n        if (!newPlaylist.endList) {\n          this.resetLoader();\n        } else {\n          this.resyncLoader();\n        }\n      }\n\n      this.currentMediaInfo_ = void 0;\n      this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined\n\n      return;\n    } // we reloaded the same playlist so we are in a live scenario\n    // and we will likely need to adjust the mediaIndex\n\n\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n    this.logger_(\"live window shift [\" + mediaSequenceDiff + \"]\"); // update the mediaIndex on the SegmentLoader\n    // this is important because we can abort a request and this value must be\n    // equal to the last appended mediaIndex\n\n    if (this.mediaIndex !== null) {\n      this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist\n      // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the\n      // new playlist was incremented by 1.\n\n      if (this.mediaIndex < 0) {\n        this.mediaIndex = null;\n        this.partIndex = null;\n      } else {\n        var segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment\n        // unless parts fell off of the playlist for this segment.\n        // In that case we need to reset partIndex and resync\n\n        if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {\n          var mediaIndex = this.mediaIndex;\n          this.logger_(\"currently processing part (index \" + this.partIndex + \") no longer exists.\");\n          this.resetLoader(); // We want to throw away the partIndex and the data associated with it,\n          // as the part was dropped from our current playlists segment.\n          // The mediaIndex will still be valid so keep that around.\n\n          this.mediaIndex = mediaIndex;\n        }\n      }\n    } // update the mediaIndex on the SegmentInfo object\n    // this is important because we will update this.mediaIndex with this value\n    // in `handleAppendsDone_` after the segment has been successfully appended\n\n\n    if (segmentInfo) {\n      segmentInfo.mediaIndex -= mediaSequenceDiff;\n\n      if (segmentInfo.mediaIndex < 0) {\n        segmentInfo.mediaIndex = null;\n        segmentInfo.partIndex = null;\n      } else {\n        // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n\n        if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {\n          segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];\n        }\n      }\n    }\n\n    this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n  }\n  /**\n   * Prevent the loader from fetching additional segments. If there\n   * is a segment request outstanding, it will finish processing\n   * before the loader halts. A segment loader can be unpaused by\n   * calling load().\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n      this.checkBufferTimeout_ = null;\n    }\n  }\n  /**\n   * Returns whether the segment loader is fetching additional\n   * segments when given the opportunity. This property can be\n   * modified through calls to pause() and load().\n   */\n  ;\n\n  _proto.paused = function paused() {\n    return this.checkBufferTimeout_ === null;\n  }\n  /**\n   * Delete all the buffered data and reset the SegmentLoader\n   *\n   * @param {Function} [done] an optional callback to be executed when the remove\n   * operation is complete\n   */\n  ;\n\n  _proto.resetEverything = function resetEverything(done) {\n    this.ended_ = false;\n    this.activeInitSegmentId_ = null;\n    this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.\n    // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,\n    // we then clamp the value to duration if necessary.\n\n    this.remove(0, Infinity, done); // clears fmp4 captions\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearAllMp4Captions'\n      }); // reset the cache in the transmuxer\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n    }\n  }\n  /**\n   * Force the SegmentLoader to resync and start loading around the currentTime instead\n   * of starting at the end of the buffer\n   *\n   * Useful for fast quality changes\n   */\n  ;\n\n  _proto.resetLoader = function resetLoader() {\n    this.fetchAtBuffer_ = false;\n    this.resyncLoader();\n  }\n  /**\n   * Force the SegmentLoader to restart synchronization and make a conservative guess\n   * before returning to the simple walk-forward method\n   */\n  ;\n\n  _proto.resyncLoader = function resyncLoader() {\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.mediaIndex = null;\n    this.partIndex = null;\n    this.syncPoint_ = null;\n    this.isPendingTimestampOffset_ = false;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.abort();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   * @param {Function} [done] - an optional callback to be executed when the remove\n   * @param {boolean} force - force all remove operations to happen\n   * operation is complete\n   */\n  ;\n\n  _proto.remove = function remove(start, end, done, force) {\n    if (done === void 0) {\n      done = function done() {};\n    }\n\n    if (force === void 0) {\n      force = false;\n    } // clamp end to duration if we need to remove everything.\n    // This is due to a browser bug that causes issues if we remove to Infinity.\n    // videojs/videojs-contrib-hls#1225\n\n\n    if (end === Infinity) {\n      end = this.duration_();\n    } // skip removes that would throw an error\n    // commonly happens during a rendition switch at the start of a video\n    // from start 0 to end 0\n\n\n    if (end <= start) {\n      this.logger_('skipping remove because end ${end} is <= start ${start}');\n      return;\n    }\n\n    if (!this.sourceUpdater_ || !this.getMediaInfo_()) {\n      this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media\n\n      return;\n    } // set it to one to complete this function's removes\n\n\n    var removesRemaining = 1;\n\n    var removeFinished = function removeFinished() {\n      removesRemaining--;\n\n      if (removesRemaining === 0) {\n        done();\n      }\n    };\n\n    if (force || !this.audioDisabled_) {\n      removesRemaining++;\n      this.sourceUpdater_.removeAudio(start, end, removeFinished);\n    } // While it would be better to only remove video if the main loader has video, this\n    // should be safe with audio only as removeVideo will call back even if there's no\n    // video buffer.\n    //\n    // In theory we can check to see if there's video before calling the remove, but in\n    // the event that we're switching between renditions and from video to audio only\n    // (when we add support for that), we may need to clear the video contents despite\n    // what the new media will contain.\n\n\n    if (force || this.loaderType_ === 'main') {\n      this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      removesRemaining++;\n      this.sourceUpdater_.removeVideo(start, end, removeFinished);\n    } // remove any captions and ID3 tags\n\n\n    for (var track in this.inbandTextTracks_) {\n      removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes\n\n    removeFinished();\n  }\n  /**\n   * (re-)schedule monitorBufferTick_ to run as soon as possible\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBuffer_ = function monitorBuffer_() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), 1);\n  }\n  /**\n   * As long as the SegmentLoader is in the READY state, periodically\n   * invoke fillBuffer_().\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBufferTick_ = function monitorBufferTick_() {\n    if (this.state === 'READY') {\n      this.fillBuffer_();\n    }\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    // TODO since the source buffer maintains a queue, and we shouldn't call this function\n    // except when we're ready for the next segment, this check can most likely be removed\n    if (this.sourceUpdater_.updating()) {\n      return;\n    } // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      this.isPendingTimestampOffset_ = false;\n      this.timelineChangeController_.pendingTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      });\n    }\n\n    this.loadSegment_(segmentInfo);\n  }\n  /**\n   * Determines if we should call endOfStream on the media source based\n   * on the state of the buffer or if appened segment was the final\n   * segment in the playlist.\n   *\n   * @param {number} [mediaIndex] the media index of segment we last appended\n   * @param {Object} [playlist] a media playlist object\n   * @return {boolean} do we need to call endOfStream on the MediaSource\n   */\n  ;\n\n  _proto.isEndOfStream_ = function isEndOfStream_(mediaIndex, playlist, partIndex) {\n    if (mediaIndex === void 0) {\n      mediaIndex = this.mediaIndex;\n    }\n\n    if (playlist === void 0) {\n      playlist = this.playlist_;\n    }\n\n    if (partIndex === void 0) {\n      partIndex = this.partIndex;\n    }\n\n    if (!playlist || !this.mediaSource_) {\n      return false;\n    }\n\n    var segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based\n\n    var appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.\n\n    var appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream\n    // so that MediaSources can trigger the `ended` event when it runs out of\n    // buffered data instead of waiting for me\n\n    return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;\n  }\n  /**\n   * Determines what request should be made given current segment loader state.\n   *\n   * @return {Object} a request object that describes the segment/part to load\n   */\n  ;\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    var buffered = this.buffered_();\n    var bufferedEnd = lastBufferedEnd(buffered) || 0;\n    var bufferedTime = timeAheadOf(buffered, this.currentTime_());\n    var preloaded = !this.hasPlayed_() && bufferedTime >= 1;\n    var haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();\n    var segments = this.playlist_.segments; // return no segment if:\n    // 1. we don't have segments\n    // 2. The video has not yet played and we already downloaded a segment\n    // 3. we already have enough buffered time\n\n    if (!segments.length || preloaded || haveEnoughBuffer) {\n      return null;\n    }\n\n    this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n    var next = {\n      partIndex: null,\n      mediaIndex: null,\n      startOfSegment: null,\n      playlist: this.playlist_,\n      isSyncRequest: Boolean(!this.syncPoint_)\n    };\n\n    if (next.isSyncRequest) {\n      next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);\n    } else if (this.mediaIndex !== null) {\n      var segment = segments[this.mediaIndex];\n      var partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;\n      next.startOfSegment = segment.end ? segment.end : bufferedEnd;\n\n      if (segment.parts && segment.parts[partIndex + 1]) {\n        next.mediaIndex = this.mediaIndex;\n        next.partIndex = partIndex + 1;\n      } else {\n        next.mediaIndex = this.mediaIndex + 1;\n      }\n    } else {\n      // Find the segment containing the end of the buffer or current time.\n      var _Playlist$getMediaInf = Playlist.getMediaInfoForTime({\n        experimentalExactManifestTimings: this.experimentalExactManifestTimings,\n        playlist: this.playlist_,\n        currentTime: this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_(),\n        startingPartIndex: this.syncPoint_.partIndex,\n        startingSegmentIndex: this.syncPoint_.segmentIndex,\n        startTime: this.syncPoint_.time\n      }),\n          segmentIndex = _Playlist$getMediaInf.segmentIndex,\n          startTime = _Playlist$getMediaInf.startTime,\n          _partIndex = _Playlist$getMediaInf.partIndex;\n\n      next.getMediaInfoForTime = this.fetchAtBuffer_ ? \"bufferedEnd \" + bufferedEnd : \"currentTime \" + this.currentTime_();\n      next.mediaIndex = segmentIndex;\n      next.startOfSegment = startTime;\n      next.partIndex = _partIndex;\n    }\n\n    var nextSegment = segments[next.mediaIndex];\n    var nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or\n    // the next partIndex is invalid do not choose a next segment.\n\n    if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {\n      return null;\n    } // if the next segment has parts, and we don't have a partIndex.\n    // Set partIndex to 0\n\n\n    if (typeof next.partIndex !== 'number' && nextSegment.parts) {\n      next.partIndex = 0;\n      nextPart = nextSegment.parts[0];\n    } // if we have no buffered data then we need to make sure\n    // that the next part we append is \"independent\" if possible.\n    // So we check if the previous part is independent, and request\n    // it if it is.\n\n\n    if (!bufferedTime && nextPart && !nextPart.independent) {\n      if (next.partIndex === 0) {\n        var lastSegment = segments[next.mediaIndex - 1];\n        var lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];\n\n        if (lastSegmentLastPart && lastSegmentLastPart.independent) {\n          next.mediaIndex -= 1;\n          next.partIndex = lastSegment.parts.length - 1;\n          next.independent = 'previous segment';\n        }\n      } else if (nextSegment.parts[next.partIndex - 1].independent) {\n        next.partIndex -= 1;\n        next.independent = 'previous part';\n      }\n    }\n\n    var ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:\n    // 1. this is the last segment in the playlist\n    // 2. end of stream has been called on the media source already\n    // 3. the player is not seeking\n\n    if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {\n      return null;\n    }\n\n    return this.generateSegmentInfo_(next);\n  };\n\n  _proto.generateSegmentInfo_ = function generateSegmentInfo_(options) {\n    var independent = options.independent,\n        playlist = options.playlist,\n        mediaIndex = options.mediaIndex,\n        startOfSegment = options.startOfSegment,\n        isSyncRequest = options.isSyncRequest,\n        partIndex = options.partIndex,\n        forceTimestampOffset = options.forceTimestampOffset,\n        getMediaInfoForTime = options.getMediaInfoForTime;\n    var segment = playlist.segments[mediaIndex];\n    var part = typeof partIndex === 'number' && segment.parts[partIndex];\n    var segmentInfo = {\n      requestId: 'segment-loader-' + Math.random(),\n      // resolve the segment URL relative to the playlist\n      uri: part && part.resolvedUri || segment.resolvedUri,\n      // the segment's mediaIndex at the time it was requested\n      mediaIndex: mediaIndex,\n      partIndex: part ? partIndex : null,\n      // whether or not to update the SegmentLoader's state with this\n      // segment's mediaIndex\n      isSyncRequest: isSyncRequest,\n      startOfSegment: startOfSegment,\n      // the segment's playlist\n      playlist: playlist,\n      // unencrypted bytes of the segment\n      bytes: null,\n      // when a key is defined for this segment, the encrypted bytes\n      encryptedBytes: null,\n      // The target timestampOffset for this segment when we append it\n      // to the source buffer\n      timestampOffset: null,\n      // The timeline that the segment is in\n      timeline: segment.timeline,\n      // The expected duration of the segment in seconds\n      duration: part && part.duration || segment.duration,\n      // retain the segment in case the playlist updates while doing an async process\n      segment: segment,\n      part: part,\n      byteLength: 0,\n      transmuxer: this.transmuxer_,\n      // type of getMediaInfoForTime that was used to get this segment\n      getMediaInfoForTime: getMediaInfoForTime,\n      independent: independent\n    };\n    var overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;\n    segmentInfo.timestampOffset = this.timestampOffsetForSegment_({\n      segmentTimeline: segment.timeline,\n      currentTimeline: this.currentTimeline_,\n      startOfSegment: startOfSegment,\n      buffered: this.buffered_(),\n      overrideCheck: overrideCheck\n    });\n    var audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());\n\n    if (typeof audioBufferedEnd === 'number') {\n      // since the transmuxer is using the actual timing values, but the buffer is\n      // adjusted by the timestamp offset, we must adjust the value here\n      segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();\n    }\n\n    if (this.sourceUpdater_.videoBuffered().length) {\n      segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_, // since the transmuxer is using the actual timing values, but the time is\n      // adjusted by the timestmap offset, we must adjust the value here\n      this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);\n    }\n\n    return segmentInfo;\n  } // get the timestampoffset for a segment,\n  // added so that vtt segment loader can override and prevent\n  // adding timestamp offsets.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_(options) {\n    return timestampOffsetForSegment(options);\n  }\n  /**\n   * Determines if the network has enough bandwidth to complete the current segment\n   * request in a timely manner. If not, the request will be aborted early and bandwidth\n   * updated to trigger a playlist switch.\n   *\n   * @param {Object} stats\n   *        Object containing stats about the request timing and size\n   * @private\n   */\n  ;\n\n  _proto.earlyAbortWhenNeeded_ = function earlyAbortWhenNeeded_(stats) {\n    if (this.vhs_.tech_.paused() || // Don't abort if the current playlist is on the lowestEnabledRendition\n    // TODO: Replace using timeout with a boolean indicating whether this playlist is\n    //       the lowestEnabledRendition.\n    !this.xhrOptions_.timeout || // Don't abort if we have no bandwidth information to estimate segment sizes\n    !this.playlist_.attributes.BANDWIDTH) {\n      return;\n    } // Wait at least 1 second since the first byte of data has been received before\n    // using the calculated bandwidth from the progress event to allow the bitrate\n    // to stabilize\n\n\n    if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n      return;\n    }\n\n    var currentTime = this.currentTime_();\n    var measuredBandwidth = stats.bandwidth;\n    var segmentDuration = this.pendingSegment_.duration;\n    var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n    // if we are only left with less than 1 second when the request completes.\n    // A negative timeUntilRebuffering indicates we are already rebuffering\n\n    var timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n    // is larger than the estimated time until the player runs out of forward buffer\n\n    if (requestTimeRemaining <= timeUntilRebuffer$1) {\n      return;\n    }\n\n    var switchCandidate = minRebufferMaxBandwidthSelector({\n      master: this.vhs_.playlists.master,\n      currentTime: currentTime,\n      bandwidth: measuredBandwidth,\n      duration: this.duration_(),\n      segmentDuration: segmentDuration,\n      timeUntilRebuffer: timeUntilRebuffer$1,\n      currentTimeline: this.currentTimeline_,\n      syncController: this.syncController_\n    });\n\n    if (!switchCandidate) {\n      return;\n    }\n\n    var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;\n    var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n    var minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n    // potential round trip time of the new request so that we are not too aggressive\n    // with switching to a playlist that might save us a fraction of a second.\n\n    if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {\n      minimumTimeSaving = 1;\n    }\n\n    if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n      return;\n    } // set the bandwidth to that of the desired playlist being sure to scale by\n    // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n    // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n\n    this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n    this.trigger('earlyabort');\n  };\n\n  _proto.handleAbort_ = function handleAbort_(segmentInfo) {\n    this.logger_(\"Aborting \" + segmentInfoString(segmentInfo));\n    this.mediaRequestsAborted += 1;\n  }\n  /**\n   * XHR `progress` event handler\n   *\n   * @param {Event}\n   *        The XHR `progress` event\n   * @param {Object} simpleSegment\n   *        A simplified segment object copy\n   * @private\n   */\n  ;\n\n  _proto.handleProgress_ = function handleProgress_(event, simpleSegment) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    this.trigger('progress');\n  };\n\n  _proto.handleTrackInfo_ = function handleTrackInfo_(simpleSegment, trackInfo) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    if (this.checkForIllegalMediaSwitch(trackInfo)) {\n      return;\n    }\n\n    trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.\n    // Guard against cases where we're not getting track info at all until we are\n    // certain that all streams will provide it.\n\n    if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n      this.startingMediaInfo_ = trackInfo;\n      this.currentMediaInfo_ = trackInfo;\n      this.logger_('trackinfo update', trackInfo);\n      this.trigger('trackinfo');\n    } // trackinfo may cause an abort if the trackinfo\n    // causes a codec change to an unsupported codec.\n\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // set trackinfo on the pending segment so that\n    // it can append.\n\n\n    this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleTimingInfo_ = function handleTimingInfo_(simpleSegment, mediaType, timeType, time) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var timingInfoProperty = timingInfoPropertyForMedia(mediaType);\n    segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};\n    segmentInfo[timingInfoProperty][timeType] = time;\n    this.logger_(\"timinginfo: \" + mediaType + \" - \" + timeType + \" - \" + time); // check if any calls were waiting on the timing info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleCaptions_ = function handleCaptions_(simpleSegment, captionData) {\n    var _this2 = this;\n\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // This could only happen with fmp4 segments, but\n    // should still not happen in general\n\n\n    if (captionData.length === 0) {\n      this.logger_('SegmentLoader received no captions from a caption event');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing\n    // can be adjusted by the timestamp offset\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();\n    var captionTracks = {}; // get total start/end and captions for each track/stream\n\n    captionData.forEach(function (caption) {\n      // caption.stream is actually a track name...\n      // set to the existing values in tracks or default values\n      captionTracks[caption.stream] = captionTracks[caption.stream] || {\n        // Infinity, as any other value will be less than this\n        startTime: Infinity,\n        captions: [],\n        // 0 as an other value will be more than this\n        endTime: 0\n      };\n      var captionTrack = captionTracks[caption.stream];\n      captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);\n      captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);\n      captionTrack.captions.push(caption);\n    });\n    Object.keys(captionTracks).forEach(function (trackName) {\n      var _captionTracks$trackN = captionTracks[trackName],\n          startTime = _captionTracks$trackN.startTime,\n          endTime = _captionTracks$trackN.endTime,\n          captions = _captionTracks$trackN.captions;\n      var inbandTextTracks = _this2.inbandTextTracks_;\n\n      _this2.logger_(\"adding cues from \" + startTime + \" -> \" + endTime + \" for \" + trackName);\n\n      createCaptionsTrackIfNotExists(inbandTextTracks, _this2.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.\n      // We do this because a rendition change that also changes the timescale for captions\n      // will result in captions being re-parsed for certain segments. If we add them again\n      // without clearing we will have two of the same captions visible.\n\n      removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);\n      addCaptionData({\n        captionArray: captions,\n        inbandTextTracks: inbandTextTracks,\n        timestampOffset: timestampOffset\n      });\n    }); // Reset stored captions since we added parsed\n    // captions to a text track at this point\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  };\n\n  _proto.handleId3_ = function handleId3_(simpleSegment, id3Frames, dispatchType) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed\n    // audio/video source with a metadata track, and an alt audio with a metadata track.\n    // However, this probably won't happen, and if it does it can be handled then.\n\n    createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.vhs_.tech_);\n    addMetadata({\n      inbandTextTracks: this.inbandTextTracks_,\n      metadataArray: id3Frames,\n      timestampOffset: timestampOffset,\n      videoDuration: this.duration_()\n    });\n  };\n\n  _proto.processMetadataQueue_ = function processMetadataQueue_() {\n    this.metadataQueue_.id3.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.caption.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n  };\n\n  _proto.processCallQueue_ = function processCallQueue_() {\n    var callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.callQueue_ = [];\n    callQueue.forEach(function (fun) {\n      return fun();\n    });\n  };\n\n  _proto.processLoadQueue_ = function processLoadQueue_() {\n    var loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.loadQueue_ = [];\n    loadQueue.forEach(function (fun) {\n      return fun();\n    });\n  }\n  /**\n   * Determines whether the loader has enough info to load the next segment.\n   *\n   * @return {boolean}\n   *         Whether or not the loader has enough info to load the next segment\n   */\n  ;\n\n  _proto.hasEnoughInfoToLoad_ = function hasEnoughInfoToLoad_() {\n    // Since primary timing goes by video, only the audio loader potentially needs to wait\n    // to load.\n    if (this.loaderType_ !== 'audio') {\n      return true;\n    }\n\n    var segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's\n    // enough info to load.\n\n    if (!segmentInfo) {\n      return false;\n    } // The first segment can and should be loaded immediately so that source buffers are\n    // created together (before appending). Source buffer creation uses the presence of\n    // audio and video data to determine whether to create audio/video source buffers, and\n    // uses processed (transmuxed or parsed) media to determine the types required.\n\n\n    if (!this.getCurrentMediaInfo_()) {\n      return true;\n    }\n\n    if ( // Technically, instead of waiting to load a segment on timeline changes, a segment\n    // can be requested and downloaded and only wait before it is transmuxed or parsed.\n    // But in practice, there are a few reasons why it is better to wait until a loader\n    // is ready to append that segment before requesting and downloading:\n    //\n    // 1. Because audio and main loaders cross discontinuities together, if this loader\n    //    is waiting for the other to catch up, then instead of requesting another\n    //    segment and using up more bandwidth, by not yet loading, more bandwidth is\n    //    allotted to the loader currently behind.\n    // 2. media-segment-request doesn't have to have logic to consider whether a segment\n    // is ready to be processed or not, isolating the queueing behavior to the loader.\n    // 3. The audio loader bases some of its segment properties on timing information\n    //    provided by the main loader, meaning that, if the logic for waiting on\n    //    processing was in media-segment-request, then it would also need to know how\n    //    to re-generate the segment information after the main loader caught up.\n    shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCurrentMediaInfo_ = function getCurrentMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;\n  };\n\n  _proto.getMediaInfo_ = function getMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;\n  };\n\n  _proto.getPendingSegmentPlaylist = function getPendingSegmentPlaylist() {\n    return this.pendingSegment_ ? this.pendingSegment_.playlist : null;\n  };\n\n  _proto.hasEnoughInfoToAppend_ = function hasEnoughInfoToAppend_() {\n    if (!this.sourceUpdater_.ready()) {\n      return false;\n    } // If content needs to be removed or the loader is waiting on an append reattempt,\n    // then no additional content should be appended until the prior append is resolved.\n\n\n    if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {\n      return false;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or\n    // we do not have information on this specific\n    // segment yet\n\n    if (!segmentInfo || !trackInfo) {\n      return false;\n    }\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n\n    if (hasVideo && !segmentInfo.videoTimingInfo) {\n      return false;\n    } // muxed content only relies on video timing information for now.\n\n\n    if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {\n      return false;\n    }\n\n    if (shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.handleData_ = function handleData_(simpleSegment, result) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // If there's anything in the call queue, then this data came later and should be\n    // executed after the calls currently queued.\n\n\n    if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {\n      this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time\n\n    this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats\n\n    this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort\n    // logic may change behavior depending on the state, and changing state too early may\n    // inflate our estimates of bandwidth. In the future this should be re-examined to\n    // note more granular states.\n    // don't process and append data if the mediaSource is closed\n\n    if (this.mediaSource_.readyState === 'closed') {\n      return;\n    } // if this request included an initialization segment, save that data\n    // to the initSegment cache\n\n\n    if (simpleSegment.map) {\n      simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request\n\n      segmentInfo.segment.map = simpleSegment.map;\n    } // if this request included a segment key, save that data in the cache\n\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    segmentInfo.isFmp4 = simpleSegment.isFmp4;\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n\n    if (segmentInfo.isFmp4) {\n      this.trigger('fmp4');\n      segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;\n    } else {\n      var trackInfo = this.getCurrentMediaInfo_();\n      var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n      var firstVideoFrameTimeForData;\n\n      if (useVideoTimingInfo) {\n        firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;\n      } // Segment loader knows more about segment timing than the transmuxer (in certain\n      // aspects), so make any changes required for a more accurate start time.\n      // Don't set the end time yet, as the segment may not be finished processing.\n\n\n      segmentInfo.timingInfo.start = this.trueSegmentStart_({\n        currentStart: segmentInfo.timingInfo.start,\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex,\n        currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),\n        useVideoTimingInfo: useVideoTimingInfo,\n        firstVideoFrameTimeForData: firstVideoFrameTimeForData,\n        videoTimingInfo: segmentInfo.videoTimingInfo,\n        audioTimingInfo: segmentInfo.audioTimingInfo\n      });\n    } // Init segments for audio and video only need to be appended in certain cases. Now\n    // that data is about to be appended, we can check the final cases to determine\n    // whether we should append an init segment.\n\n\n    this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,\n    // as we use the start of the segment to offset the best guess (playlist provided)\n    // timestamp offset.\n\n    this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should\n    // be appended or not.\n\n    if (segmentInfo.isSyncRequest) {\n      // first save/update our timing info for this segment.\n      // this is what allows us to choose an accurate segment\n      // and the main reason we make a sync request.\n      this.updateTimingInfoEnd_(segmentInfo);\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n      var next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next\n      // after taking into account its timing info, do not append it.\n\n      if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {\n        this.logger_('sync segment was incorrect, not appending');\n        return;\n      } // otherwise append it like any other segment as our guess was correct.\n\n\n      this.logger_('sync segment was correct, appending');\n    } // Save some state so that in the future anything waiting on first append (and/or\n    // timestamp offset(s)) can process immediately. While the extra state isn't optimal,\n    // we need some notion of whether the timestamp offset or other relevant information\n    // has had a chance to be set.\n\n\n    segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.\n\n    this.processMetadataQueue_();\n    this.appendData_(segmentInfo, result);\n  };\n\n  _proto.updateAppendInitSegmentStatus = function updateAppendInitSegmentStatus(segmentInfo, type) {\n    // alt audio doesn't manage timestamp offset\n    if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' && // in the case that we're handling partial data, we don't want to append an init\n    // segment for each chunk\n    !segmentInfo.changedTimestampOffset) {\n      // if the timestamp offset changed, the timeline may have changed, so we have to re-\n      // append init segments\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n    }\n\n    if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {\n      // make sure we append init segment on playlist changes, in case the media config\n      // changed\n      this.appendInitSegment_[type] = true;\n    }\n  };\n\n  _proto.getInitSegmentAndUpdateState_ = function getInitSegmentAndUpdateState_(_ref4) {\n    var type = _ref4.type,\n        initSegment = _ref4.initSegment,\n        map = _ref4.map,\n        playlist = _ref4.playlist; // \"The EXT-X-MAP tag specifies how to obtain the Media Initialization Section\n    // (Section 3) required to parse the applicable Media Segments.  It applies to every\n    // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag\n    // or until the end of the playlist.\"\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5\n\n    if (map) {\n      var id = initSegmentId(map);\n\n      if (this.activeInitSegmentId_ === id) {\n        // don't need to re-append the init segment if the ID matches\n        return null;\n      } // a map-specified init segment takes priority over any transmuxed (or otherwise\n      // obtained) init segment\n      //\n      // this also caches the init segment for later use\n\n\n      initSegment = this.initSegmentForMap(map, true).bytes;\n      this.activeInitSegmentId_ = id;\n    } // We used to always prepend init segments for video, however, that shouldn't be\n    // necessary. Instead, we should only append on changes, similar to what we've always\n    // done for audio. This is more important (though may not be that important) for\n    // frame-by-frame appending for LHLS, simply because of the increased quantity of\n    // appends.\n\n\n    if (initSegment && this.appendInitSegment_[type]) {\n      // Make sure we track the playlist that we last used for the init segment, so that\n      // we can re-append the init segment in the event that we get data from a new\n      // playlist. Discontinuities and track changes are handled in other sections.\n      this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.\n\n      this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since\n      // we are appending the muxer init segment\n\n      this.activeInitSegmentId_ = null;\n      return initSegment;\n    }\n\n    return null;\n  };\n\n  _proto.handleQuotaExceededError_ = function handleQuotaExceededError_(_ref5, error) {\n    var _this3 = this;\n\n    var segmentInfo = _ref5.segmentInfo,\n        type = _ref5.type,\n        bytes = _ref5.bytes;\n    var audioBuffered = this.sourceUpdater_.audioBuffered();\n    var videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,\n    // should be cleared out during the buffer removals. However, log in case it helps\n    // debug.\n\n    if (audioBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));\n    }\n\n    if (videoBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));\n    }\n\n    var audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;\n    var audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;\n    var videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;\n    var videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;\n\n    if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {\n      // Can't remove enough buffer to make room for new segment (or the browser doesn't\n      // allow for appends of segments this size). In the future, it may be possible to\n      // split up the segment and append in pieces, but for now, error out this playlist\n      // in an attempt to switch to a more manageable rendition.\n      this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + (\"Appended byte length: \" + bytes.byteLength + \", \") + (\"audio buffer: \" + timeRangesToArray(audioBuffered).join(', ') + \", \") + (\"video buffer: \" + timeRangesToArray(videoBuffered).join(', ') + \", \"));\n      this.error({\n        message: 'Quota exceeded error with append of a single segment of content',\n        excludeUntil: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // To try to resolve the quota exceeded error, clear back buffer and retry. This means\n    // that the segment-loader should block on future events until this one is handled, so\n    // that it doesn't keep moving onto further segments. Adding the call to the call\n    // queue will prevent further appends until waitingOnRemove_ and\n    // quotaExceededErrorRetryTimeout_ are cleared.\n    //\n    // Note that this will only block the current loader. In the case of demuxed content,\n    // the other load may keep filling as fast as possible. In practice, this should be\n    // OK, as it is a rare case when either audio has a high enough bitrate to fill up a\n    // source buffer, or video fills without enough room for audio to append (and without\n    // the availability of clearing out seconds of back buffer to make room for audio).\n    // But it might still be good to handle this case in the future as a TODO.\n\n\n    this.waitingOnRemove_ = true;\n    this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n    var currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content\n    // before retrying.\n\n    var timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;\n    this.logger_(\"On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to \" + timeToRemoveUntil);\n    this.remove(0, timeToRemoveUntil, function () {\n      _this3.logger_(\"On QUOTA_EXCEEDED_ERR, retrying append in \" + MIN_BACK_BUFFER + \"s\");\n\n      _this3.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted\n      // attempts (since we can't clear less than the minimum)\n\n      _this3.quotaExceededErrorRetryTimeout_ = window$1.setTimeout(function () {\n        _this3.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');\n\n        _this3.quotaExceededErrorRetryTimeout_ = null;\n\n        _this3.processCallQueue_();\n      }, MIN_BACK_BUFFER * 1000);\n    }, true);\n  };\n\n  _proto.handleAppendError_ = function handleAppendError_(_ref6, error) {\n    var segmentInfo = _ref6.segmentInfo,\n        type = _ref6.type,\n        bytes = _ref6.bytes; // if there's no error, nothing to do\n\n    if (!error) {\n      return;\n    }\n\n    if (error.code === QUOTA_EXCEEDED_ERR) {\n      this.handleQuotaExceededError_({\n        segmentInfo: segmentInfo,\n        type: type,\n        bytes: bytes\n      }); // A quota exceeded error should be recoverable with a future re-append, so no need\n      // to trigger an append error.\n\n      return;\n    }\n\n    this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error);\n    this.error(type + \" append of \" + bytes.length + \"b failed for segment \" + (\"#\" + segmentInfo.mediaIndex + \" in playlist \" + segmentInfo.playlist.id)); // If an append errors, we often can't recover.\n    // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).\n    //\n    // Trigger a special error so that it can be handled separately from normal,\n    // recoverable errors.\n\n    this.trigger('appenderror');\n  };\n\n  _proto.appendToSourceBuffer_ = function appendToSourceBuffer_(_ref7) {\n    var segmentInfo = _ref7.segmentInfo,\n        type = _ref7.type,\n        initSegment = _ref7.initSegment,\n        data = _ref7.data,\n        bytes = _ref7.bytes; // If this is a re-append, bytes were already created and don't need to be recreated\n\n    if (!bytes) {\n      var segments = [data];\n      var byteLength = data.byteLength;\n\n      if (initSegment) {\n        // if the media initialization segment is changing, append it before the content\n        // segment\n        segments.unshift(initSegment);\n        byteLength += initSegment.byteLength;\n      } // Technically we should be OK appending the init segment separately, however, we\n      // haven't yet tested that, and prepending is how we have always done things.\n\n\n      bytes = concatSegments({\n        bytes: byteLength,\n        segments: segments\n      });\n    }\n\n    this.sourceUpdater_.appendBuffer({\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }, this.handleAppendError_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n  };\n\n  _proto.handleSegmentTimingInfo_ = function handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {\n    if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n      return;\n    }\n\n    var segment = this.pendingSegment_.segment;\n    var timingInfoProperty = type + \"TimingInfo\";\n\n    if (!segment[timingInfoProperty]) {\n      segment[timingInfoProperty] = {};\n    }\n\n    segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;\n    segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;\n    segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;\n    segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;\n    segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging\n\n    segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;\n  };\n\n  _proto.appendData_ = function appendData_(segmentInfo, result) {\n    var type = result.type,\n        data = result.data;\n\n    if (!data || !data.byteLength) {\n      return;\n    }\n\n    if (type === 'audio' && this.audioDisabled_) {\n      return;\n    }\n\n    var initSegment = this.getInitSegmentAndUpdateState_({\n      type: type,\n      initSegment: result.initSegment,\n      playlist: segmentInfo.playlist,\n      map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null\n    });\n    this.appendToSourceBuffer_({\n      segmentInfo: segmentInfo,\n      type: type,\n      initSegment: initSegment,\n      data: data\n    });\n  }\n  /**\n   * load a specific segment from a request into the buffer\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadSegment_ = function loadSegment_(segmentInfo) {\n    var _this4 = this;\n\n    this.state = 'WAITING';\n    this.pendingSegment_ = segmentInfo;\n    this.trimBackBuffer_(segmentInfo);\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({\n          action: 'clearAllMp4Captions'\n        });\n      }\n    }\n\n    if (!this.hasEnoughInfoToLoad_()) {\n      this.loadQueue_.push(function () {\n        // regenerate the audioAppendStart, timestampOffset, etc as they\n        // may have changed since this function was added to the queue.\n        var options = _extends({}, segmentInfo, {\n          forceTimestampOffset: true\n        });\n\n        _extends(segmentInfo, _this4.generateSegmentInfo_(options));\n\n        _this4.isPendingTimestampOffset_ = false;\n\n        _this4.updateTransmuxerAndRequestSegment_(segmentInfo);\n      });\n      return;\n    }\n\n    this.updateTransmuxerAndRequestSegment_(segmentInfo);\n  };\n\n  _proto.updateTransmuxerAndRequestSegment_ = function updateTransmuxerAndRequestSegment_(segmentInfo) {\n    var _this5 = this; // We'll update the source buffer's timestamp offset once we have transmuxed data, but\n    // the transmuxer still needs to be updated before then.\n    //\n    // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp\n    // offset must be passed to the transmuxer for stream correcting adjustments.\n\n\n    if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {\n      this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared\n\n      segmentInfo.gopsToAlignWith = [];\n      this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n      this.transmuxer_.postMessage({\n        action: 'setTimestampOffset',\n        timestampOffset: segmentInfo.timestampOffset\n      });\n    }\n\n    var simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);\n    var isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);\n    var isWalkingForward = this.mediaIndex !== null;\n    var isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ && // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,\n    // the first timeline\n    segmentInfo.timeline > 0;\n    var isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;\n    this.logger_(\"Requesting \" + segmentInfoString(segmentInfo)); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),\n    // then this init segment has never been seen before and should be appended.\n    //\n    // At this point the content type (audio/video or both) is not yet known, but it should be safe to set\n    // both to true and leave the decision of whether to append the init segment to append time.\n\n    if (simpleSegment.map && !simpleSegment.map.bytes) {\n      this.logger_('going to request init segment.');\n      this.appendInitSegment_ = {\n        video: true,\n        audio: true\n      };\n    }\n\n    segmentInfo.abortRequests = mediaSegmentRequest({\n      xhr: this.vhs_.xhr,\n      xhrOptions: this.xhrOptions_,\n      decryptionWorker: this.decrypter_,\n      segment: simpleSegment,\n      abortFn: this.handleAbort_.bind(this, segmentInfo),\n      progressFn: this.handleProgress_.bind(this),\n      trackInfoFn: this.handleTrackInfo_.bind(this),\n      timingInfoFn: this.handleTimingInfo_.bind(this),\n      videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),\n      audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),\n      captionsFn: this.handleCaptions_.bind(this),\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: function endedTimelineFn() {\n        _this5.logger_('received endedtimeline callback');\n      },\n      id3Fn: this.handleId3_.bind(this),\n      dataFn: this.handleData_.bind(this),\n      doneFn: this.segmentRequestFinished_.bind(this),\n      onTransmuxerLog: function onTransmuxerLog(_ref8) {\n        var message = _ref8.message,\n            level = _ref8.level,\n            stream = _ref8.stream;\n\n        _this5.logger_(segmentInfoString(segmentInfo) + \" logged from transmuxer stream \" + stream + \" as a \" + level + \": \" + message);\n      }\n    });\n  }\n  /**\n   * trim the back buffer so that we don't have too much data\n   * in the source buffer\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   */\n  ;\n\n  _proto.trimBackBuffer_ = function trimBackBuffer_(segmentInfo) {\n    var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n    // buffer and a very conservative \"garbage collector\"\n    // We manually clear out the old buffer to ensure\n    // we don't trigger the QuotaExceeded error\n    // on the source buffer during subsequent appends\n\n    if (removeToTime > 0) {\n      this.remove(0, removeToTime);\n    }\n  }\n  /**\n   * created a simplified copy of the segment object with just the\n   * information necessary to perform the XHR and decryption\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   * @return {Object} a simplified segment object copy\n   */\n  ;\n\n  _proto.createSimplifiedSegmentObj_ = function createSimplifiedSegmentObj_(segmentInfo) {\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var simpleSegment = {\n      resolvedUri: part ? part.resolvedUri : segment.resolvedUri,\n      byterange: part ? part.byterange : segment.byterange,\n      requestId: segmentInfo.requestId,\n      transmuxer: segmentInfo.transmuxer,\n      audioAppendStart: segmentInfo.audioAppendStart,\n      gopsToAlignWith: segmentInfo.gopsToAlignWith,\n      part: segmentInfo.part\n    };\n    var previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];\n\n    if (previousSegment && previousSegment.timeline === segment.timeline) {\n      // The baseStartTime of a segment is used to handle rollover when probing the TS\n      // segment to retrieve timing information. Since the probe only looks at the media's\n      // times (e.g., PTS and DTS values of the segment), and doesn't consider the\n      // player's time (e.g., player.currentTime()), baseStartTime should reflect the\n      // media time as well. transmuxedDecodeEnd represents the end time of a segment, in\n      // seconds of media time, so should be used here. The previous segment is used since\n      // the end of the previous segment should represent the beginning of the current\n      // segment, so long as they are on the same timeline.\n      if (previousSegment.videoTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;\n      } else if (previousSegment.audioTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;\n      }\n    }\n\n    if (segment.key) {\n      // if the media sequence is greater than 2^32, the IV will be incorrect\n      // assuming 10s segments, that would be about 1300 years\n      var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n      simpleSegment.key = this.segmentKey(segment.key);\n      simpleSegment.key.iv = iv;\n    }\n\n    if (segment.map) {\n      simpleSegment.map = this.initSegmentForMap(segment.map);\n    }\n\n    return simpleSegment;\n  };\n\n  _proto.saveTransferStats_ = function saveTransferStats_(stats) {\n    // every request counts as a media request even if it has been aborted\n    // or canceled due to a timeout\n    this.mediaRequests += 1;\n\n    if (stats) {\n      this.mediaBytesTransferred += stats.bytesReceived;\n      this.mediaTransferDuration += stats.roundTripTime;\n    }\n  };\n\n  _proto.saveBandwidthRelatedStats_ = function saveBandwidthRelatedStats_(duration, stats) {\n    // byteLength will be used for throughput, and should be based on bytes receieved,\n    // which we only know at the end of the request and should reflect total bytes\n    // downloaded rather than just bytes processed from components of the segment\n    this.pendingSegment_.byteLength = stats.bytesReceived;\n\n    if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's bandwidth because its duration of \" + duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    this.bandwidth = stats.bandwidth;\n    this.roundTrip = stats.roundTripTime;\n  };\n\n  _proto.handleTimeout_ = function handleTimeout_() {\n    // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functinality between segment loaders\n    this.mediaRequestsTimedout += 1;\n    this.bandwidth = 1;\n    this.roundTrip = NaN;\n    this.trigger('bandwidthupdate');\n    this.trigger('timeout');\n  }\n  /**\n   * Handle the callback from the segmentRequest function and set the\n   * associated SegmentLoader state and errors if necessary\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    // TODO handle special cases, e.g., muxed audio/video but only audio in the segment\n    // check the call queue directly since this function doesn't need to deal with any\n    // data, and can continue even if the source buffers are not set up and we didn't get\n    // any data from the segment\n    if (this.callQueue_.length) {\n      this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset\n\n    if (!this.pendingSegment_) {\n      return;\n    } // the request was aborted and the SegmentLoader has already started\n    // another request. this can happen when the timeout for an aborted\n    // request triggers due to a limitation in the XHR library\n    // do not count this as any sort of request or we risk double-counting\n\n\n    if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n      return;\n    } // an error occurred from the active pendingSegment_ so reset everything\n\n\n    if (error) {\n      this.pendingSegment_ = null;\n      this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        return;\n      }\n\n      this.pause(); // the error is really just that at least one of the requests timed-out\n      // set the bandwidth to a very low value and trigger an ABR switch to\n      // take emergency action\n\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n        return;\n      } // if control-flow has arrived here, then the error is real\n      // emit an error event to blacklist the current playlist\n\n\n      this.mediaRequestsErrored += 1;\n      this.error(error);\n      this.trigger('error');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request\n    // generated for ABR purposes\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n    segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n\n    if (result.gopInfo) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);\n    } // Although we may have already started appending on progress, we shouldn't switch the\n    // state away from loading until we are officially done loading the segment data.\n\n\n    this.state = 'APPENDING'; // used for testing\n\n    this.trigger('appending');\n    this.waitForAppendsToComplete_(segmentInfo);\n  };\n\n  _proto.setTimeMapping_ = function setTimeMapping_(timeline) {\n    var timelineMapping = this.syncController_.mappingForTimeline(timeline);\n\n    if (timelineMapping !== null) {\n      this.timeMapping_ = timelineMapping;\n    }\n  };\n\n  _proto.updateMediaSecondsLoaded_ = function updateMediaSecondsLoaded_(segment) {\n    if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n      this.mediaSecondsLoaded += segment.end - segment.start;\n    } else {\n      this.mediaSecondsLoaded += segment.duration;\n    }\n  };\n\n  _proto.shouldUpdateTransmuxerTimestampOffset_ = function shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {\n    if (timestampOffset === null) {\n      return false;\n    } // note that we're potentially using the same timestamp offset for both video and\n    // audio\n\n\n    if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      return true;\n    }\n\n    if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.trueSegmentStart_ = function trueSegmentStart_(_ref9) {\n    var currentStart = _ref9.currentStart,\n        playlist = _ref9.playlist,\n        mediaIndex = _ref9.mediaIndex,\n        firstVideoFrameTimeForData = _ref9.firstVideoFrameTimeForData,\n        currentVideoTimestampOffset = _ref9.currentVideoTimestampOffset,\n        useVideoTimingInfo = _ref9.useVideoTimingInfo,\n        videoTimingInfo = _ref9.videoTimingInfo,\n        audioTimingInfo = _ref9.audioTimingInfo;\n\n    if (typeof currentStart !== 'undefined') {\n      // if start was set once, keep using it\n      return currentStart;\n    }\n\n    if (!useVideoTimingInfo) {\n      return audioTimingInfo.start;\n    }\n\n    var previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained\n    // within that segment. Since the transmuxer maintains a cache of incomplete data\n    // from and/or the last frame seen, the start time may reflect a frame that starts\n    // in the previous segment. Check for that case and ensure the start time is\n    // accurate for the segment.\n\n    if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {\n      return firstVideoFrameTimeForData;\n    }\n\n    return videoTimingInfo.start;\n  };\n\n  _proto.waitForAppendsToComplete_ = function waitForAppendsToComplete_(segmentInfo) {\n    var trackInfo = this.getCurrentMediaInfo_(segmentInfo);\n\n    if (!trackInfo) {\n      this.error({\n        message: 'No starting media returned, likely due to an unsupported media format.',\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // Although transmuxing is done, appends may not yet be finished. Throw a marker\n    // on each queue this loader is responsible for to ensure that the appends are\n    // complete.\n\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n    var waitForVideo = this.loaderType_ === 'main' && hasVideo;\n    var waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;\n    segmentInfo.waitingOnAppends = 0; // segments with no data\n\n    if (!segmentInfo.hasAppendedData_) {\n      if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {\n        // When there's no audio or video data in the segment, there's no audio or video\n        // timing information.\n        //\n        // If there's no audio or video timing information, then the timestamp offset\n        // can't be adjusted to the appropriate value for the transmuxer and source\n        // buffers.\n        //\n        // Therefore, the next segment should be used to set the timestamp offset.\n        this.isPendingTimestampOffset_ = true;\n      } // override settings for metadata only segments\n\n\n      segmentInfo.timingInfo = {\n        start: 0\n      };\n      segmentInfo.waitingOnAppends++;\n\n      if (!this.isPendingTimestampOffset_) {\n        // update the timestampoffset\n        this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have\n        // no video/audio data.\n\n        this.processMetadataQueue_();\n      } // append is \"done\" instantly with no data.\n\n\n      this.checkAppendsDone_(segmentInfo);\n      return;\n    } // Since source updater could call back synchronously, do the increments first.\n\n\n    if (waitForVideo) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForAudio) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForVideo) {\n      this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n\n    if (waitForAudio) {\n      this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n  };\n\n  _proto.checkAppendsDone_ = function checkAppendsDone_(segmentInfo) {\n    if (this.checkForAbort_(segmentInfo.requestId)) {\n      return;\n    }\n\n    segmentInfo.waitingOnAppends--;\n\n    if (segmentInfo.waitingOnAppends === 0) {\n      this.handleAppendsDone_();\n    }\n  };\n\n  _proto.checkForIllegalMediaSwitch = function checkForIllegalMediaSwitch(trackInfo) {\n    var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);\n\n    if (illegalMediaSwitchError) {\n      this.error({\n        message: illegalMediaSwitchError,\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.updateSourceBufferTimestampOffset_ = function updateSourceBufferTimestampOffset_(segmentInfo) {\n    if (segmentInfo.timestampOffset === null || // we don't yet have the start for whatever media type (video or audio) has\n    // priority, timing-wise, so we must wait\n    typeof segmentInfo.timingInfo.start !== 'number' || // already updated the timestamp offset for this segment\n    segmentInfo.changedTimestampOffset || // the alt audio loader should not be responsible for setting the timestamp offset\n    this.loaderType_ !== 'main') {\n      return;\n    }\n\n    var didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that\n    // the timing info here comes from video. In the event that the audio is longer than\n    // the video, this will trim the start of the audio.\n    // This also trims any offset from 0 at the beginning of the media\n\n    segmentInfo.timestampOffset -= this.getSegmentStartTimeForTimestampOffsetCalculation_({\n      videoTimingInfo: segmentInfo.segment.videoTimingInfo,\n      audioTimingInfo: segmentInfo.segment.audioTimingInfo,\n      timingInfo: segmentInfo.timingInfo\n    }); // In the event that there are part segment downloads, each will try to update the\n    // timestamp offset. Retaining this bit of state prevents us from updating in the\n    // future (within the same segment), however, there may be a better way to handle it.\n\n    segmentInfo.changedTimestampOffset = true;\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (didChange) {\n      this.trigger('timestampoffset');\n    }\n  };\n\n  _proto.getSegmentStartTimeForTimestampOffsetCalculation_ = function getSegmentStartTimeForTimestampOffsetCalculation_(_ref10) {\n    var videoTimingInfo = _ref10.videoTimingInfo,\n        audioTimingInfo = _ref10.audioTimingInfo,\n        timingInfo = _ref10.timingInfo;\n\n    if (!this.useDtsForTimestampOffset_) {\n      return timingInfo.start;\n    }\n\n    if (videoTimingInfo && typeof videoTimingInfo.transmuxedDecodeStart === 'number') {\n      return videoTimingInfo.transmuxedDecodeStart;\n    } // handle audio only\n\n\n    if (audioTimingInfo && typeof audioTimingInfo.transmuxedDecodeStart === 'number') {\n      return audioTimingInfo.transmuxedDecodeStart;\n    } // handle content not transmuxed (e.g., MP4)\n\n\n    return timingInfo.start;\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_(segmentInfo) {\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n    var trackInfo = this.getMediaInfo_();\n    var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n    var prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;\n\n    if (!prioritizedTimingInfo) {\n      return;\n    }\n\n    segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ? // End time may not exist in a case where we aren't parsing the full segment (one\n    // current example is the case of fmp4), so use the rough duration to calculate an\n    // end time.\n    prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;\n  }\n  /**\n   * callback to run when appendBuffer is finished. detects if we are\n   * in a good state to do things with the data we got, or if we need\n   * to wait for more\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleAppendsDone_ = function handleAppendsDone_() {\n    // appendsdone can cause an abort\n    if (this.pendingSegment_) {\n      this.trigger('appendsdone');\n    }\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in\n      // all appending cases?\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Now that the end of the segment has been reached, we can set the end time. It's\n    // best to wait until all appends are done so we're sure that the primary media is\n    // finished (and we have its end time).\n\n    this.updateTimingInfoEnd_(segmentInfo);\n\n    if (this.shouldSaveSegmentTimingInfo_) {\n      // Timeline mappings should only be saved for the main loader. This is for multiple\n      // reasons:\n      //\n      // 1) Only one mapping is saved per timeline, meaning that if both the audio loader\n      //    and the main loader try to save the timeline mapping, whichever comes later\n      //    will overwrite the first. In theory this is OK, as the mappings should be the\n      //    same, however, it breaks for (2)\n      // 2) In the event of a live stream, the initial live point will make for a somewhat\n      //    arbitrary mapping. If audio and video streams are not perfectly in-sync, then\n      //    the mapping will be off for one of the streams, dependent on which one was\n      //    first saved (see (1)).\n      // 3) Primary timing goes by video in VHS, so the mapping should be video.\n      //\n      // Since the audio loader will wait for the main loader to load the first segment,\n      // the main loader will save the first timeline mapping, and ensure that there won't\n      // be a case where audio loads two segments without saving a mapping (thus leading\n      // to missing segment timing info).\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n    }\n\n    var segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);\n\n    if (segmentDurationMessage) {\n      if (segmentDurationMessage.severity === 'warn') {\n        videojs.log.warn(segmentDurationMessage.message);\n      } else {\n        this.logger_(segmentDurationMessage.message);\n      }\n    }\n\n    this.recordThroughput_(segmentInfo);\n    this.pendingSegment_ = null;\n    this.state = 'READY';\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate'); // if the sync request was not appended\n      // then it was not the correct segment.\n      // throw it away and use the data it gave us\n      // to get the correct one.\n\n      if (!segmentInfo.hasAppendedData_) {\n        this.logger_(\"Throwing away un-appended sync request \" + segmentInfoString(segmentInfo));\n        return;\n      }\n    }\n\n    this.logger_(\"Appended \" + segmentInfoString(segmentInfo));\n    this.addSegmentMetadataCue_(segmentInfo);\n    this.fetchAtBuffer_ = true;\n\n    if (this.currentTimeline_ !== segmentInfo.timeline) {\n      this.timelineChangeController_.lastTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      }); // If audio is not disabled, the main segment loader is responsible for updating\n      // the audio timeline as well. If the content is video only, this won't have any\n      // impact.\n\n      if (this.loaderType_ === 'main' && !this.audioDisabled_) {\n        this.timelineChangeController_.lastTimelineChange({\n          type: 'audio',\n          from: this.currentTimeline_,\n          to: segmentInfo.timeline\n        });\n      }\n    }\n\n    this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n    // the following conditional otherwise it may consider this a bad \"guess\"\n    // and attempt to resync when the post-update seekable window and live\n    // point would mean that this was the perfect segment to fetch\n\n    this.trigger('syncinfoupdate');\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;\n    var badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before\n    // the currentTime_ that means that our conservative guess was too conservative.\n    // In that case, reset the loader state so that we try to use any information gained\n    // from the previous request to create a new, more accurate, sync-point.\n\n    if (badSegmentGuess || badPartGuess) {\n      this.logger_(\"bad \" + (badSegmentGuess ? 'segment' : 'part') + \" \" + segmentInfoString(segmentInfo));\n      this.resetEverything();\n      return;\n    }\n\n    var isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment\n    // and conservatively guess\n\n    if (isWalkingForward) {\n      this.trigger('bandwidthupdate');\n    }\n\n    this.trigger('progress');\n    this.mediaIndex = segmentInfo.mediaIndex;\n    this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the\n    // buffer, end the stream. this ensures the \"ended\" event will\n    // fire if playback reaches that point.\n\n    if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {\n      this.endOfStream();\n    } // used for testing\n\n\n    this.trigger('appended');\n\n    if (segmentInfo.hasAppendedData_) {\n      this.mediaAppends++;\n    }\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * Records the current throughput of the decrypt, transmux, and append\n   * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n   * moving average of the throughput. `throughput.count` is the number of\n   * data points in the average.\n   *\n   * @private\n   * @param {Object} segmentInfo the object returned by loadSegment\n   */\n  ;\n\n  _proto.recordThroughput_ = function recordThroughput_(segmentInfo) {\n    if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's throughput because its duration of \" + segmentInfo.duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n    // by zero in the case where the throughput is ridiculously high\n\n    var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n    var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n    //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n    this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n  }\n  /**\n   * Adds a cue to the segment-metadata track with some metadata information about the\n   * segment\n   *\n   * @private\n   * @param {Object} segmentInfo\n   *        the object returned by loadSegment\n   * @method addSegmentMetadataCue_\n   */\n  ;\n\n  _proto.addSegmentMetadataCue_ = function addSegmentMetadataCue_(segmentInfo) {\n    if (!this.segmentMetadataTrack_) {\n      return;\n    }\n\n    var segment = segmentInfo.segment;\n    var start = segment.start;\n    var end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n    if (!finite(start) || !finite(end)) {\n      return;\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n    var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n    var value = {\n      custom: segment.custom,\n      dateTimeObject: segment.dateTimeObject,\n      dateTimeString: segment.dateTimeString,\n      bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n      resolution: segmentInfo.playlist.attributes.RESOLUTION,\n      codecs: segmentInfo.playlist.attributes.CODECS,\n      byteLength: segmentInfo.byteLength,\n      uri: segmentInfo.uri,\n      timeline: segmentInfo.timeline,\n      playlist: segmentInfo.playlist.id,\n      start: start,\n      end: end\n    };\n    var data = JSON.stringify(value);\n    var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n    // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n    cue.value = value;\n    this.segmentMetadataTrack_.addCue(cue);\n  };\n\n  return SegmentLoader;\n}(videojs.EventTarget);\n\nfunction noop() {}\n\nvar toTitleCase = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n\nvar bufferTypes = ['video', 'audio'];\n\nvar _updating = function updating(type, sourceUpdater) {\n  var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n  return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];\n};\n\nvar nextQueueIndexOfType = function nextQueueIndexOfType(type, queue) {\n  for (var i = 0; i < queue.length; i++) {\n    var queueEntry = queue[i];\n\n    if (queueEntry.type === 'mediaSource') {\n      // If the next entry is a media source entry (uses multiple source buffers), block\n      // processing to allow it to go through first.\n      return null;\n    }\n\n    if (queueEntry.type === type) {\n      return i;\n    }\n  }\n\n  return null;\n};\n\nvar shiftQueue = function shiftQueue(type, sourceUpdater) {\n  if (sourceUpdater.queue.length === 0) {\n    return;\n  }\n\n  var queueIndex = 0;\n  var queueEntry = sourceUpdater.queue[queueIndex];\n\n  if (queueEntry.type === 'mediaSource') {\n    if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {\n      sourceUpdater.queue.shift();\n      queueEntry.action(sourceUpdater);\n\n      if (queueEntry.doneFn) {\n        queueEntry.doneFn();\n      } // Only specific source buffer actions must wait for async updateend events. Media\n      // Source actions process synchronously. Therefore, both audio and video source\n      // buffers are now clear to process the next queue entries.\n\n\n      shiftQueue('audio', sourceUpdater);\n      shiftQueue('video', sourceUpdater);\n    } // Media Source actions require both source buffers, so if the media source action\n    // couldn't process yet (because one or both source buffers are busy), block other\n    // queue actions until both are available and the media source action can process.\n\n\n    return;\n  }\n\n  if (type === 'mediaSource') {\n    // If the queue was shifted by a media source action (this happens when pushing a\n    // media source action onto the queue), then it wasn't from an updateend event from an\n    // audio or video source buffer, so there's no change from previous state, and no\n    // processing should be done.\n    return;\n  } // Media source queue entries don't need to consider whether the source updater is\n  // started (i.e., source buffers are created) as they don't need the source buffers, but\n  // source buffer queue entries do.\n\n\n  if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || _updating(type, sourceUpdater)) {\n    return;\n  }\n\n  if (queueEntry.type !== type) {\n    queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);\n\n    if (queueIndex === null) {\n      // Either there's no queue entry that uses this source buffer type in the queue, or\n      // there's a media source queue entry before the next entry of this type, in which\n      // case wait for that action to process first.\n      return;\n    }\n\n    queueEntry = sourceUpdater.queue[queueIndex];\n  }\n\n  sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.\n  //\n  // The queue pending operation must be set before the action is performed in the event\n  // that the action results in a synchronous event that is acted upon. For instance, if\n  // an exception is thrown that can be handled, it's possible that new actions will be\n  // appended to an empty queue and immediately executed, but would not have the correct\n  // pending information if this property was set after the action was performed.\n\n  sourceUpdater.queuePending[type] = queueEntry;\n  queueEntry.action(type, sourceUpdater);\n\n  if (!queueEntry.doneFn) {\n    // synchronous operation, process next entry\n    sourceUpdater.queuePending[type] = null;\n    shiftQueue(type, sourceUpdater);\n    return;\n  }\n};\n\nvar cleanupBuffer = function cleanupBuffer(type, sourceUpdater) {\n  var buffer = sourceUpdater[type + \"Buffer\"];\n  var titleType = toTitleCase(type);\n\n  if (!buffer) {\n    return;\n  }\n\n  buffer.removeEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n  buffer.removeEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n  sourceUpdater.codecs[type] = null;\n  sourceUpdater[type + \"Buffer\"] = null;\n};\n\nvar inSourceBuffers = function inSourceBuffers(mediaSource, sourceBuffer) {\n  return mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;\n};\n\nvar actions = {\n  appendBuffer: function appendBuffer(bytes, segmentInfo, onError) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Appending segment \" + segmentInfo.mediaIndex + \"'s \" + bytes.length + \" bytes to \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.appendBuffer(bytes);\n      } catch (e) {\n        sourceUpdater.logger_(\"Error with code \" + e.code + \" \" + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + (\"when appending segment \" + segmentInfo.mediaIndex + \" to \" + type + \"Buffer\"));\n        sourceUpdater.queuePending[type] = null;\n        onError(e);\n      }\n    };\n  },\n  remove: function remove(start, end) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + start + \" to \" + end + \" from \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.remove(start, end);\n      } catch (e) {\n        sourceUpdater.logger_(\"Remove \" + start + \" to \" + end + \" from \" + type + \"Buffer failed\");\n      }\n    };\n  },\n  timestampOffset: function timestampOffset(offset) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Setting \" + type + \"timestampOffset to \" + offset);\n      sourceBuffer.timestampOffset = offset;\n    };\n  },\n  callback: function callback(_callback) {\n    return function (type, sourceUpdater) {\n      _callback();\n    };\n  },\n  endOfStream: function endOfStream(error) {\n    return function (sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Calling mediaSource endOfStream(\" + (error || '') + \")\");\n\n      try {\n        sourceUpdater.mediaSource.endOfStream(error);\n      } catch (e) {\n        videojs.log.warn('Failed to call media source endOfStream', e);\n      }\n    };\n  },\n  duration: function duration(_duration) {\n    return function (sourceUpdater) {\n      sourceUpdater.logger_(\"Setting mediaSource duration to \" + _duration);\n\n      try {\n        sourceUpdater.mediaSource.duration = _duration;\n      } catch (e) {\n        videojs.log.warn('Failed to set media source duration', e);\n      }\n    };\n  },\n  abort: function abort() {\n    return function (type, sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"calling abort on \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.abort();\n      } catch (e) {\n        videojs.log.warn(\"Failed to abort on \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  addSourceBuffer: function addSourceBuffer(type, codec) {\n    return function (sourceUpdater) {\n      var titleType = toTitleCase(type);\n      var mime = getMimeForCodec(codec);\n      sourceUpdater.logger_(\"Adding \" + type + \"Buffer with codec \" + codec + \" to mediaSource\");\n      var sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);\n      sourceBuffer.addEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n      sourceBuffer.addEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n      sourceUpdater.codecs[type] = codec;\n      sourceUpdater[type + \"Buffer\"] = sourceBuffer;\n    };\n  },\n  removeSourceBuffer: function removeSourceBuffer(type) {\n    return function (sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + type + \"Buffer with codec \" + sourceUpdater.codecs[type] + \" from mediaSource\");\n\n      try {\n        sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);\n      } catch (e) {\n        videojs.log.warn(\"Failed to removeSourceBuffer \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  changeType: function changeType(codec) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      var mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      } // do not update codec if we don't need to.\n\n\n      if (sourceUpdater.codecs[type] === codec) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"changing \" + type + \"Buffer codec from \" + sourceUpdater.codecs[type] + \" to \" + codec);\n      sourceBuffer.changeType(mime);\n      sourceUpdater.codecs[type] = codec;\n    };\n  }\n};\n\nvar pushQueue = function pushQueue(_ref) {\n  var type = _ref.type,\n      sourceUpdater = _ref.sourceUpdater,\n      action = _ref.action,\n      doneFn = _ref.doneFn,\n      name = _ref.name;\n  sourceUpdater.queue.push({\n    type: type,\n    action: action,\n    doneFn: doneFn,\n    name: name\n  });\n  shiftQueue(type, sourceUpdater);\n};\n\nvar onUpdateend = function onUpdateend(type, sourceUpdater) {\n  return function (e) {\n    // Although there should, in theory, be a pending action for any updateend receieved,\n    // there are some actions that may trigger updateend events without set definitions in\n    // the w3c spec. For instance, setting the duration on the media source may trigger\n    // updateend events on source buffers. This does not appear to be in the spec. As such,\n    // if we encounter an updateend without a corresponding pending action from our queue\n    // for that source buffer type, process the next action.\n    if (sourceUpdater.queuePending[type]) {\n      var doneFn = sourceUpdater.queuePending[type].doneFn;\n      sourceUpdater.queuePending[type] = null;\n\n      if (doneFn) {\n        // if there's an error, report it\n        doneFn(sourceUpdater[type + \"Error_\"]);\n      }\n    }\n\n    shiftQueue(type, sourceUpdater);\n  };\n};\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from\n * @param {string} mimeType the desired MIME type of the underlying SourceBuffer\n */\n\n\nvar SourceUpdater = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SourceUpdater, _videojs$EventTarget);\n\n  function SourceUpdater(mediaSource) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.mediaSource = mediaSource;\n\n    _this.sourceopenListener_ = function () {\n      return shiftQueue('mediaSource', _assertThisInitialized(_this));\n    };\n\n    _this.mediaSource.addEventListener('sourceopen', _this.sourceopenListener_);\n\n    _this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0\n\n    _this.audioTimestampOffset_ = 0;\n    _this.videoTimestampOffset_ = 0;\n    _this.queue = [];\n    _this.queuePending = {\n      audio: null,\n      video: null\n    };\n    _this.delayedAudioAppendQueue_ = [];\n    _this.videoAppendQueued_ = false;\n    _this.codecs = {};\n    _this.onVideoUpdateEnd_ = onUpdateend('video', _assertThisInitialized(_this));\n    _this.onAudioUpdateEnd_ = onUpdateend('audio', _assertThisInitialized(_this));\n\n    _this.onVideoError_ = function (e) {\n      // used for debugging\n      _this.videoError_ = e;\n    };\n\n    _this.onAudioError_ = function (e) {\n      // used for debugging\n      _this.audioError_ = e;\n    };\n\n    _this.createdSourceBuffers_ = false;\n    _this.initializedEme_ = false;\n    _this.triggeredReady_ = false;\n    return _this;\n  }\n\n  var _proto = SourceUpdater.prototype;\n\n  _proto.initializedEme = function initializedEme() {\n    this.initializedEme_ = true;\n    this.triggerReady();\n  };\n\n  _proto.hasCreatedSourceBuffers = function hasCreatedSourceBuffers() {\n    // if false, likely waiting on one of the segment loaders to get enough data to create\n    // source buffers\n    return this.createdSourceBuffers_;\n  };\n\n  _proto.hasInitializedAnyEme = function hasInitializedAnyEme() {\n    return this.initializedEme_;\n  };\n\n  _proto.ready = function ready() {\n    return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();\n  };\n\n  _proto.createSourceBuffers = function createSourceBuffers(codecs) {\n    if (this.hasCreatedSourceBuffers()) {\n      // already created them before\n      return;\n    } // the intial addOrChangeSourceBuffers will always be\n    // two add buffers.\n\n\n    this.addOrChangeSourceBuffers(codecs);\n    this.createdSourceBuffers_ = true;\n    this.trigger('createdsourcebuffers');\n    this.triggerReady();\n  };\n\n  _proto.triggerReady = function triggerReady() {\n    // only allow ready to be triggered once, this prevents the case\n    // where:\n    // 1. we trigger createdsourcebuffers\n    // 2. ie 11 synchronously initializates eme\n    // 3. the synchronous initialization causes us to trigger ready\n    // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.\n    if (this.ready() && !this.triggeredReady_) {\n      this.triggeredReady_ = true;\n      this.trigger('ready');\n    }\n  }\n  /**\n   * Add a type of source buffer to the media source.\n   *\n   * @param {string} type\n   *        The type of source buffer to add.\n   *\n   * @param {string} codec\n   *        The codec to add the source buffer with.\n   */\n  ;\n\n  _proto.addSourceBuffer = function addSourceBuffer(type, codec) {\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.addSourceBuffer(type, codec),\n      name: 'addSourceBuffer'\n    });\n  }\n  /**\n   * call abort on a source buffer.\n   *\n   * @param {string} type\n   *        The type of source buffer to call abort on.\n   */\n  ;\n\n  _proto.abort = function abort(type) {\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.abort(type),\n      name: 'abort'\n    });\n  }\n  /**\n   * Call removeSourceBuffer and remove a specific type\n   * of source buffer on the mediaSource.\n   *\n   * @param {string} type\n   *        The type of source buffer to remove.\n   */\n  ;\n\n  _proto.removeSourceBuffer = function removeSourceBuffer(type) {\n    if (!this.canRemoveSourceBuffer()) {\n      videojs.log.error('removeSourceBuffer is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.removeSourceBuffer(type),\n      name: 'removeSourceBuffer'\n    });\n  }\n  /**\n   * Whether or not the removeSourceBuffer function is supported\n   * on the mediaSource.\n   *\n   * @return {boolean}\n   *          if removeSourceBuffer can be called.\n   */\n  ;\n\n  _proto.canRemoveSourceBuffer = function canRemoveSourceBuffer() {\n    // IE reports that it supports removeSourceBuffer, but often throws\n    // errors when attempting to use the function. So we report that it\n    // does not support removeSourceBuffer. As of Firefox 83 removeSourceBuffer\n    // throws errors, so we report that it does not support this as well.\n    return !videojs.browser.IE_VERSION && !videojs.browser.IS_FIREFOX && window$1.MediaSource && window$1.MediaSource.prototype && typeof window$1.MediaSource.prototype.removeSourceBuffer === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  SourceUpdater.canChangeType = function canChangeType() {\n    return window$1.SourceBuffer && window$1.SourceBuffer.prototype && typeof window$1.SourceBuffer.prototype.changeType === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  _proto.canChangeType = function canChangeType() {\n    return this.constructor.canChangeType();\n  }\n  /**\n   * Call the changeType function on a source buffer, given the code and type.\n   *\n   * @param {string} type\n   *        The type of source buffer to call changeType on.\n   *\n   * @param {string} codec\n   *        The codec string to change type with on the source buffer.\n   */\n  ;\n\n  _proto.changeType = function changeType(type, codec) {\n    if (!this.canChangeType()) {\n      videojs.log.error('changeType is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.changeType(codec),\n      name: 'changeType'\n    });\n  }\n  /**\n   * Add source buffers with a codec or, if they are already created,\n   * call changeType on source buffers using changeType.\n   *\n   * @param {Object} codecs\n   *        Codecs to switch to\n   */\n  ;\n\n  _proto.addOrChangeSourceBuffers = function addOrChangeSourceBuffers(codecs) {\n    var _this2 = this;\n\n    if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {\n      throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');\n    }\n\n    Object.keys(codecs).forEach(function (type) {\n      var codec = codecs[type];\n\n      if (!_this2.hasCreatedSourceBuffers()) {\n        return _this2.addSourceBuffer(type, codec);\n      }\n\n      if (_this2.canChangeType()) {\n        _this2.changeType(type, codec);\n      }\n    });\n  }\n  /**\n   * Queue an update to append an ArrayBuffer.\n   *\n   * @param {MediaObject} object containing audioBytes and/or videoBytes\n   * @param {Function} done the function to call when done\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n   */\n  ;\n\n  _proto.appendBuffer = function appendBuffer(options, doneFn) {\n    var _this3 = this;\n\n    var segmentInfo = options.segmentInfo,\n        type = options.type,\n        bytes = options.bytes;\n    this.processedAppend_ = true;\n\n    if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {\n      this.delayedAudioAppendQueue_.push([options, doneFn]);\n      this.logger_(\"delayed audio append of \" + bytes.length + \" until video append\");\n      return;\n    } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will\n    // not be fired. This means that the queue will be blocked until the next action\n    // taken by the segment-loader. Provide a mechanism for segment-loader to handle\n    // these errors by calling the doneFn with the specific error.\n\n\n    var onError = doneFn;\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.appendBuffer(bytes, segmentInfo || {\n        mediaIndex: -1\n      }, onError),\n      doneFn: doneFn,\n      name: 'appendBuffer'\n    });\n\n    if (type === 'video') {\n      this.videoAppendQueued_ = true;\n\n      if (!this.delayedAudioAppendQueue_.length) {\n        return;\n      }\n\n      var queue = this.delayedAudioAppendQueue_.slice();\n      this.logger_(\"queuing delayed audio \" + queue.length + \" appendBuffers\");\n      this.delayedAudioAppendQueue_.length = 0;\n      queue.forEach(function (que) {\n        _this3.appendBuffer.apply(_this3, que);\n      });\n    }\n  }\n  /**\n   * Get the audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The audio buffer's buffered time range\n   */\n  ;\n\n  _proto.audioBuffered = function audioBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.audioBuffer.buffered ? this.audioBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get the video buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The video buffer's buffered time range\n   */\n  ;\n\n  _proto.videoBuffered = function videoBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.videoBuffer.buffered ? this.videoBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get a combined video/audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         the combined time range\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;\n    var audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;\n\n    if (audio && !video) {\n      return this.audioBuffered();\n    }\n\n    if (video && !audio) {\n      return this.videoBuffered();\n    }\n\n    return bufferIntersection(this.audioBuffered(), this.videoBuffered());\n  }\n  /**\n   * Add a callback to the queue that will set duration on the mediaSource.\n   *\n   * @param {number} duration\n   *        The duration to set\n   *\n   * @param {Function} [doneFn]\n   *        function to run after duration has been set.\n   */\n  ;\n\n  _proto.setDuration = function setDuration(duration, doneFn) {\n    if (doneFn === void 0) {\n      doneFn = noop;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.duration(duration),\n      name: 'duration',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Add a mediaSource endOfStream call to the queue\n   *\n   * @param {Error} [error]\n   *        Call endOfStream with an error\n   *\n   * @param {Function} [doneFn]\n   *        A function that should be called when the\n   *        endOfStream call has finished.\n   */\n  ;\n\n  _proto.endOfStream = function endOfStream(error, doneFn) {\n    if (error === void 0) {\n      error = null;\n    }\n\n    if (doneFn === void 0) {\n      doneFn = noop;\n    }\n\n    if (typeof error !== 'string') {\n      error = undefined;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.endOfStream(error),\n      name: 'endOfStream',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeAudio = function removeAudio(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeVideo = function removeVideo(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Whether the underlying sourceBuffer is updating or not\n   *\n   * @return {boolean} the updating status of the SourceBuffer\n   */\n  ;\n\n  _proto.updating = function updating() {\n    // the audio/video source buffer is updating\n    if (_updating('audio', this) || _updating('video', this)) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Set/get the timestampoffset on the audio SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.audioTimestampOffset = function audioTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.audioBuffer && // no point in updating if it's the same\n    this.audioTimestampOffset_ !== offset) {\n      pushQueue({\n        type: 'audio',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.audioTimestampOffset_ = offset;\n    }\n\n    return this.audioTimestampOffset_;\n  }\n  /**\n   * Set/get the timestampoffset on the video SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.videoTimestampOffset = function videoTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.videoBuffer && // no point in updating if it's the same\n    this.videoTimestampOffset !== offset) {\n      pushQueue({\n        type: 'video',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.videoTimestampOffset_ = offset;\n    }\n\n    return this.videoTimestampOffset_;\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the audio queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.audioQueueCallback = function audioQueueCallback(callback) {\n    if (!this.audioBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the video queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.videoQueueCallback = function videoQueueCallback(callback) {\n    if (!this.videoBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * dispose of the source updater and the underlying sourceBuffer\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this4 = this;\n\n    this.trigger('dispose');\n    bufferTypes.forEach(function (type) {\n      _this4.abort(type);\n\n      if (_this4.canRemoveSourceBuffer()) {\n        _this4.removeSourceBuffer(type);\n      } else {\n        _this4[type + \"QueueCallback\"](function () {\n          return cleanupBuffer(type, _this4);\n        });\n      }\n    });\n    this.videoAppendQueued_ = false;\n    this.delayedAudioAppendQueue_.length = 0;\n\n    if (this.sourceopenListener_) {\n      this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);\n    }\n\n    this.off();\n  };\n\n  return SourceUpdater;\n}(videojs.EventTarget);\n\nvar uint8ToUtf8 = function uint8ToUtf8(uintArray) {\n  return decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n};\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (_char3) {\n  return _char3.charCodeAt(0);\n}));\n\nvar NoVttJsError = /*#__PURE__*/function (_Error) {\n  _inheritsLoose(NoVttJsError, _Error);\n\n  function NoVttJsError() {\n    return _Error.call(this, 'Trying to parse received VTT cues, but there is no WebVTT. Make sure vtt.js is loaded.') || this;\n  }\n\n  return NoVttJsError;\n}( /*#__PURE__*/_wrapNativeSuper(Error));\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar VTTSegmentLoader = /*#__PURE__*/function (_SegmentLoader) {\n  _inheritsLoose(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _SegmentLoader.call(this, settings, options) || this; // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n    _this.mediaSource_ = null;\n    _this.subtitlesTrack_ = null;\n    _this.loaderType_ = 'subtitle';\n    _this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks;\n    _this.loadVttJs = settings.loadVttJs; // The VTT segment will have its own time mappings. Saving VTT segment timing info in\n    // the sync controller leads to improper behavior.\n\n    _this.shouldSaveSegmentTimingInfo_ = false;\n    return _this;\n  }\n\n  var _proto = VTTSegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    // don't need to transmux any subtitles\n    return null;\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {\n      return videojs.createTimeRanges();\n    }\n\n    var cues = this.subtitlesTrack_.cues;\n    var start = cues[0].startTime;\n    var end = cues[cues.length - 1].startTime;\n    return videojs.createTimeRanges([[start, end]]);\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      // append WebVTT line terminators to the media initialization segment if it exists\n      // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n      // requires two or more WebVTT line terminators between the WebVTT header and the\n      // rest of the file\n      var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n      var combinedSegment = new Uint8Array(combinedByteLength);\n      combinedSegment.set(map.bytes);\n      combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: combinedSegment\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY';\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * Set a subtitle track on the segment loader to add subtitles to\n   *\n   * @param {TextTrack=} track\n   *        The text track to add loaded subtitles to\n   * @return {TextTrack}\n   *        Returns the subtitles track\n   */\n  ;\n\n  _proto.track = function track(_track) {\n    if (typeof _track === 'undefined') {\n      return this.subtitlesTrack_;\n    }\n\n    this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      this.init_();\n    }\n\n    return this.subtitlesTrack_;\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   */\n  ;\n\n  _proto.remove = function remove(start, end) {\n    removeCuesFromTrack(start, end, this.subtitlesTrack_);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    var _this2 = this; // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n      // We don't have the timestamp offset that we need to sync subtitles.\n      // Rerun on a timestamp offset or user interaction.\n      var checkTimestampOffset = function checkTimestampOffset() {\n        _this2.state = 'READY';\n\n        if (!_this2.paused()) {\n          // if not paused, queue a buffer check as soon as possible\n          _this2.monitorBuffer_();\n        }\n      };\n\n      this.syncController_.one('timestampoffset', checkTimestampOffset);\n      this.state = 'WAITING_ON_TIMELINE';\n      return;\n    }\n\n    this.loadSegment_(segmentInfo);\n  } // never set a timestamp offset for vtt segments.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_() {\n    return null;\n  };\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    return this.skipEmptySegments_(_SegmentLoader.prototype.chooseNextRequest_.call(this));\n  }\n  /**\n   * Prevents the segment loader from requesting segments we know contain no subtitles\n   * by walking forward until we find the next segment that we don't know whether it is\n   * empty or not.\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @return {Object}\n   *         a segment info object that describes the current segment\n   */\n  ;\n\n  _proto.skipEmptySegments_ = function skipEmptySegments_(segmentInfo) {\n    while (segmentInfo && segmentInfo.segment.empty) {\n      // stop at the last possible segmentInfo\n      if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {\n        segmentInfo = null;\n        break;\n      }\n\n      segmentInfo = this.generateSegmentInfo_({\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex + 1,\n        startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,\n        isSyncRequest: segmentInfo.isSyncRequest\n      });\n    }\n\n    return segmentInfo;\n  };\n\n  _proto.stopForError = function stopForError(error) {\n    this.error(error);\n    this.state = 'READY';\n    this.pause();\n    this.trigger('error');\n  }\n  /**\n   * append a decrypted segement to the SourceBuffer through a SourceUpdater\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    var _this3 = this;\n\n    if (!this.subtitlesTrack_) {\n      this.state = 'READY';\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // the request was aborted\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY';\n      this.mediaRequestsAborted += 1;\n      return;\n    }\n\n    if (error) {\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n      }\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        this.mediaRequestsAborted += 1;\n      } else {\n        this.mediaRequestsErrored += 1;\n      }\n\n      this.stopForError(error);\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functionality between segment loaders\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats); // if this request included a segment key, save that data in the cache\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    this.state = 'APPENDING'; // used for tests\n\n    this.trigger('appending');\n    var segment = segmentInfo.segment;\n\n    if (segment.map) {\n      segment.map.bytes = simpleSegment.map.bytes;\n    }\n\n    segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, load it and wait till it finished loading\n\n    if (typeof window$1.WebVTT !== 'function' && typeof this.loadVttJs === 'function') {\n      this.state = 'WAITING_ON_VTTJS'; // should be fine to call multiple times\n      // script will be loaded once but multiple listeners will be added to the queue, which is expected.\n\n      this.loadVttJs().then(function () {\n        return _this3.segmentRequestFinished_(error, simpleSegment, result);\n      }, function () {\n        return _this3.stopForError({\n          message: 'Error loading vtt.js'\n        });\n      });\n      return;\n    }\n\n    segment.requested = true;\n\n    try {\n      this.parseVTTCues_(segmentInfo);\n    } catch (e) {\n      this.stopForError({\n        message: e.message\n      });\n      return;\n    }\n\n    this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n    if (segmentInfo.cues.length) {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.cues[0].startTime,\n        end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime\n      };\n    } else {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.startOfSegment,\n        end: segmentInfo.startOfSegment + segmentInfo.duration\n      };\n    }\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate');\n      this.pendingSegment_ = null;\n      this.state = 'READY';\n      return;\n    }\n\n    segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n    this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to\n    // the subtitle track\n\n    segmentInfo.cues.forEach(function (cue) {\n      _this3.subtitlesTrack_.addCue(_this3.featuresNativeTextTracks_ ? new window$1.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);\n    }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows\n    // cues to have identical time-intervals, but if the text is also identical\n    // we can safely assume it is a duplicate that can be removed (ex. when a cue\n    // \"overlaps\" VTT segments)\n\n    removeDuplicateCuesFromTrack(this.subtitlesTrack_);\n    this.handleAppendsDone_();\n  };\n\n  _proto.handleData_ = function handleData_() {// noop as we shouldn't be getting video/audio data captions\n    // that we do not support here.\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_() {// noop\n  }\n  /**\n   * Uses the WebVTT parser to parse the segment response\n   *\n   * @throws NoVttJsError\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @private\n   */\n  ;\n\n  _proto.parseVTTCues_ = function parseVTTCues_(segmentInfo) {\n    var decoder;\n    var decodeBytesToString = false;\n\n    if (typeof window$1.WebVTT !== 'function') {\n      // caller is responsible for exception handling.\n      throw new NoVttJsError();\n    }\n\n    if (typeof window$1.TextDecoder === 'function') {\n      decoder = new window$1.TextDecoder('utf8');\n    } else {\n      decoder = window$1.WebVTT.StringDecoder();\n      decodeBytesToString = true;\n    }\n\n    var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, decoder);\n    segmentInfo.cues = [];\n    segmentInfo.timestampmap = {\n      MPEGTS: 0,\n      LOCAL: 0\n    };\n    parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n\n    parser.ontimestampmap = function (map) {\n      segmentInfo.timestampmap = map;\n    };\n\n    parser.onparsingerror = function (error) {\n      videojs.log.warn('Error encountered when parsing cues: ' + error.message);\n    };\n\n    if (segmentInfo.segment.map) {\n      var mapData = segmentInfo.segment.map.bytes;\n\n      if (decodeBytesToString) {\n        mapData = uint8ToUtf8(mapData);\n      }\n\n      parser.parse(mapData);\n    }\n\n    var segmentData = segmentInfo.bytes;\n\n    if (decodeBytesToString) {\n      segmentData = uint8ToUtf8(segmentData);\n    }\n\n    parser.parse(segmentData);\n    parser.flush();\n  }\n  /**\n   * Updates the start and end times of any cues parsed by the WebVTT parser using\n   * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n   * from the SyncController\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @param {Object} mappingObj\n   *        object containing a mapping from TS to media time\n   * @param {Object} playlist\n   *        the playlist object containing the segment\n   * @private\n   */\n  ;\n\n  _proto.updateTimeMapping_ = function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n    var segment = segmentInfo.segment;\n\n    if (!mappingObj) {\n      // If the sync controller does not have a mapping of TS to Media Time for the\n      // timeline, then we don't have enough information to update the cue\n      // start/end times\n      return;\n    }\n\n    if (!segmentInfo.cues.length) {\n      // If there are no cues, we also do not have enough information to figure out\n      // segment timing. Mark that the segment contains no cues so we don't re-request\n      // an empty segment.\n      segment.empty = true;\n      return;\n    }\n\n    var timestampmap = segmentInfo.timestampmap;\n    var diff = timestampmap.MPEGTS / ONE_SECOND_IN_TS - timestampmap.LOCAL + mappingObj.mapping;\n    segmentInfo.cues.forEach(function (cue) {\n      // First convert cue time to TS time using the timestamp-map provided within the vtt\n      cue.startTime += diff;\n      cue.endTime += diff;\n    });\n\n    if (!playlist.syncInfo) {\n      var firstStart = segmentInfo.cues[0].startTime;\n      var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n      playlist.syncInfo = {\n        mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n        time: Math.min(firstStart, lastStart - segment.duration)\n      };\n    }\n  };\n\n  return VTTSegmentLoader;\n}(SegmentLoader);\n/**\n * @file ad-cue-tags.js\n */\n\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n *\n * @param {Object} track\n *        the track to find the cue for\n *\n * @param {number} mediaTime\n *        the time to find the cue at\n *\n * @return {Object|null}\n *         the found cue or null\n */\n\n\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n\n  return null;\n};\n\nvar updateAdCues = function updateAdCues(media, track, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      } // otherwise extend cue until a CUE-IN is found\n\n\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime; // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n        var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat),\n            adOffset = _segment$cueOutCont$s[0],\n            adTotal = _segment$cueOutCont$s[1];\n\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n\n    mediaTime += segment.duration;\n  }\n}; // synchronize expired playlist segments.\n// the max media sequence diff is 48 hours of live stream\n// content with two second segments. Anything larger than that\n// will likely be invalid.\n\n\nvar MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;\nvar syncPointStrategies = [// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (duration !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}, // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (!Object.keys(syncController.timelineToDatetimeMappings).length) {\n      return null;\n    }\n\n    var syncPoint = null;\n    var lastDistance = null;\n    var partsAndSegments = getPartsAndSegments(playlist);\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];\n\n      if (!datetimeMapping || !segment.dateTimeObject) {\n        continue;\n      }\n\n      var segmentTime = segment.dateTimeObject.getTime() / 1000;\n      var start = segmentTime + datetimeMapping; // take part duration into account.\n\n      if (segment.parts && typeof partAndSegment.partIndex === 'number') {\n        for (var z = 0; z < partAndSegment.partIndex; z++) {\n          start += segment.parts[z].duration;\n        }\n      }\n\n      var distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed\n      // currentTime and can stop looking for better candidates\n\n      if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n        break;\n      }\n\n      lastDistance = distance;\n      syncPoint = {\n        time: start,\n        segmentIndex: partAndSegment.segmentIndex,\n        partIndex: partAndSegment.partIndex\n      };\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n    var partsAndSegments = getPartsAndSegments(playlist);\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;\n\n      if (segment.timeline === currentTimeline && typeof start !== 'undefined') {\n        var distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: start,\n            segmentIndex: partAndSegment.segmentIndex,\n            partIndex: partAndSegment.partIndex\n          };\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex,\n              partIndex: null\n            };\n          }\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}];\n\nvar SyncController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SyncController, _videojs$EventTarget);\n\n  function SyncController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // ...for synching across variants\n\n    _this.timelines = [];\n    _this.discontinuities = [];\n    _this.timelineToDatetimeMappings = {};\n    _this.logger_ = logger('SyncController');\n    return _this;\n  }\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Object}\n   *          A sync-point object\n   */\n\n\n  var _proto = SyncController.prototype;\n\n  _proto.getSyncPoint = function getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n\n    if (!syncPoints.length) {\n      // Signal that we need to attempt to get a sync-point manually\n      // by fetching a segment in the playlist and constructing\n      // a sync-point from that information\n      return null;\n    } // Now find the sync-point that is closest to the currentTime because\n    // that should result in the most accurate guess about which segment\n    // to fetch\n\n\n    return this.selectSyncPoint_(syncPoints, {\n      key: 'time',\n      value: currentTime\n    });\n  }\n  /**\n   * Calculate the amount of time that has expired off the playlist during playback\n   *\n   * @param {Playlist} playlist\n   *        Playlist object to calculate expired from\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playling a live source)\n   * @return {number|null}\n   *          The amount of time that has expired off the playlist during playback. Null\n   *          if no sync-points for the playlist can be found.\n   */\n  ;\n\n  _proto.getExpiredTime = function getExpiredTime(playlist, duration) {\n    if (!playlist || !playlist.segments) {\n      return null;\n    }\n\n    var syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n    if (!syncPoints.length) {\n      return null;\n    }\n\n    var syncPoint = this.selectSyncPoint_(syncPoints, {\n      key: 'segmentIndex',\n      value: 0\n    }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n    // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n    if (syncPoint.segmentIndex > 0) {\n      syncPoint.time *= -1;\n    }\n\n    return Math.abs(syncPoint.time + sumDurations({\n      defaultDuration: playlist.targetDuration,\n      durationList: playlist.segments,\n      startIndex: syncPoint.segmentIndex,\n      endIndex: 0\n    }));\n  }\n  /**\n   * Runs each sync-point strategy and returns a list of sync-points returned by the\n   * strategies\n   *\n   * @private\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Array}\n   *          A list of sync-point objects\n   */\n  ;\n\n  _proto.runStrategies_ = function runStrategies_(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n    for (var i = 0; i < syncPointStrategies.length; i++) {\n      var strategy = syncPointStrategies[i];\n      var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n\n      if (syncPoint) {\n        syncPoint.strategy = strategy.name;\n        syncPoints.push({\n          strategy: strategy.name,\n          syncPoint: syncPoint\n        });\n      }\n    }\n\n    return syncPoints;\n  }\n  /**\n   * Selects the sync-point nearest the specified target\n   *\n   * @private\n   * @param {Array} syncPoints\n   *        List of sync-points to select from\n   * @param {Object} target\n   *        Object specifying the property and value we are targeting\n   * @param {string} target.key\n   *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n   * @param {number} target.value\n   *        The value to target for the specified key.\n   * @return {Object}\n   *          The sync-point nearest the target\n   */\n  ;\n\n  _proto.selectSyncPoint_ = function selectSyncPoint_(syncPoints, target) {\n    var bestSyncPoint = syncPoints[0].syncPoint;\n    var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n    var bestStrategy = syncPoints[0].strategy;\n\n    for (var i = 1; i < syncPoints.length; i++) {\n      var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n      if (newDistance < bestDistance) {\n        bestDistance = newDistance;\n        bestSyncPoint = syncPoints[i].syncPoint;\n        bestStrategy = syncPoints[i].strategy;\n      }\n    }\n\n    this.logger_(\"syncPoint for [\" + target.key + \": \" + target.value + \"] chosen with strategy\" + (\" [\" + bestStrategy + \"]: [time:\" + bestSyncPoint.time + \",\") + (\" segmentIndex:\" + bestSyncPoint.segmentIndex) + (typeof bestSyncPoint.partIndex === 'number' ? \",partIndex:\" + bestSyncPoint.partIndex : '') + ']');\n    return bestSyncPoint;\n  }\n  /**\n   * Save any meta-data present on the segments when segments leave\n   * the live window to the playlist to allow for synchronization at the\n   * playlist level later.\n   *\n   * @param {Playlist} oldPlaylist - The previous active playlist\n   * @param {Playlist} newPlaylist - The updated and most current playlist\n   */\n  ;\n\n  _proto.saveExpiredSegmentInfo = function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps\n\n    if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {\n      videojs.log.warn(\"Not saving expired segment info. Media sequence gap \" + mediaSequenceDiff + \" is too large.\");\n      return;\n    } // When a segment expires from the playlist and it has a start time\n    // save that information as a possible sync-point reference in future\n\n\n    for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n      var lastRemovedSegment = oldPlaylist.segments[i];\n\n      if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n        newPlaylist.syncInfo = {\n          mediaSequence: oldPlaylist.mediaSequence + i,\n          time: lastRemovedSegment.start\n        };\n        this.logger_(\"playlist refresh sync: [time:\" + newPlaylist.syncInfo.time + \",\" + (\" mediaSequence: \" + newPlaylist.syncInfo.mediaSequence + \"]\"));\n        this.trigger('syncinfoupdate');\n        break;\n      }\n    }\n  }\n  /**\n   * Save the mapping from playlist's ProgramDateTime to display. This should only happen\n   * before segments start to load.\n   *\n   * @param {Playlist} playlist - The currently active playlist\n   */\n  ;\n\n  _proto.setDateTimeMappingForStart = function setDateTimeMappingForStart(playlist) {\n    // It's possible for the playlist to be updated before playback starts, meaning time\n    // zero is not yet set. If, during these playlist refreshes, a discontinuity is\n    // crossed, then the old time zero mapping (for the prior timeline) would be retained\n    // unless the mappings are cleared.\n    this.timelineToDatetimeMappings = {};\n\n    if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n      var firstSegment = playlist.segments[0];\n      var playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;\n      this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;\n    }\n  }\n  /**\n   * Calculates and saves timeline mappings, playlist sync info, and segment timing values\n   * based on the latest timing information.\n   *\n   * @param {Object} options\n   *        Options object\n   * @param {SegmentInfo} options.segmentInfo\n   *        The current active request information\n   * @param {boolean} options.shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved for timeline mapping and program date time mappings.\n   */\n  ;\n\n  _proto.saveSegmentTimingInfo = function saveSegmentTimingInfo(_ref) {\n    var segmentInfo = _ref.segmentInfo,\n        shouldSaveTimelineMapping = _ref.shouldSaveTimelineMapping;\n    var didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);\n    var segment = segmentInfo.segment;\n\n    if (didCalculateSegmentTimeMapping) {\n      this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n      // now with segment timing information\n\n      if (!segmentInfo.playlist.syncInfo) {\n        segmentInfo.playlist.syncInfo = {\n          mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: segment.start\n        };\n      }\n    }\n\n    var dateTime = segment.dateTimeObject;\n\n    if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {\n      this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);\n    }\n  };\n\n  _proto.timestampOffsetForTimeline = function timestampOffsetForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].time;\n  };\n\n  _proto.mappingForTimeline = function mappingForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].mapping;\n  }\n  /**\n   * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n   * save that display time to the segment.\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo\n   *        The current active request information\n   * @param {Object} timingInfo\n   *        The start and end time of the current segment in \"media time\"\n   * @param {boolean} shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved in timelines.\n   * @return {boolean}\n   *          Returns false if segment time mapping could not be calculated\n   */\n  ;\n\n  _proto.calculateSegmentTimeMapping_ = function calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {\n    // TODO: remove side effects\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var mappingObj = this.timelines[segmentInfo.timeline];\n    var start;\n    var end;\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      mappingObj = {\n        time: segmentInfo.startOfSegment,\n        mapping: segmentInfo.startOfSegment - timingInfo.start\n      };\n\n      if (shouldSaveTimelineMapping) {\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n        this.logger_(\"time mapping for timeline \" + segmentInfo.timeline + \": \" + (\"[time: \" + mappingObj.time + \"] [mapping: \" + mappingObj.mapping + \"]\"));\n      }\n\n      start = segmentInfo.startOfSegment;\n      end = timingInfo.end + mappingObj.mapping;\n    } else if (mappingObj) {\n      start = timingInfo.start + mappingObj.mapping;\n      end = timingInfo.end + mappingObj.mapping;\n    } else {\n      return false;\n    }\n\n    if (part) {\n      part.start = start;\n      part.end = end;\n    } // If we don't have a segment start yet or the start value we got\n    // is less than our current segment.start value, save a new start value.\n    // We have to do this because parts will have segment timing info saved\n    // multiple times and we want segment start to be the earliest part start\n    // value for that segment.\n\n\n    if (!segment.start || start < segment.start) {\n      segment.start = start;\n    }\n\n    segment.end = end;\n    return true;\n  }\n  /**\n   * Each time we have discontinuity in the playlist, attempt to calculate the location\n   * in display of the start of the discontinuity and save that. We also save an accuracy\n   * value so that we save values with the most accuracy (closest to 0.)\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo - The current active request information\n   */\n  ;\n\n  _proto.saveDiscontinuitySyncInfo_ = function saveDiscontinuitySyncInfo_(segmentInfo) {\n    var playlist = segmentInfo.playlist;\n    var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n    // the start of the range and it's accuracy is 0 (greater accuracy values\n    // mean more approximation)\n\n    if (segment.discontinuity) {\n      this.discontinuities[segment.timeline] = {\n        time: segment.start,\n        accuracy: 0\n      };\n    } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      // Search for future discontinuities that we can provide better timing\n      // information for and save that information for sync purposes\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n        var accuracy = Math.abs(mediaIndexDiff);\n\n        if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n          var time = void 0;\n\n          if (mediaIndexDiff < 0) {\n            time = segment.start - sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex,\n              endIndex: segmentIndex\n            });\n          } else {\n            time = segment.end + sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex + 1,\n              endIndex: segmentIndex\n            });\n          }\n\n          this.discontinuities[discontinuity] = {\n            time: time,\n            accuracy: accuracy\n          };\n        }\n      }\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.off();\n  };\n\n  return SyncController;\n}(videojs.EventTarget);\n/**\n * The TimelineChangeController acts as a source for segment loaders to listen for and\n * keep track of latest and pending timeline changes. This is useful to ensure proper\n * sync, as each loader may need to make a consideration for what timeline the other\n * loader is on before making changes which could impact the other loader's media.\n *\n * @class TimelineChangeController\n * @extends videojs.EventTarget\n */\n\n\nvar TimelineChangeController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(TimelineChangeController, _videojs$EventTarget);\n\n  function TimelineChangeController() {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.pendingTimelineChanges_ = {};\n    _this.lastTimelineChanges_ = {};\n    return _this;\n  }\n\n  var _proto = TimelineChangeController.prototype;\n\n  _proto.clearPendingTimelineChange = function clearPendingTimelineChange(type) {\n    this.pendingTimelineChanges_[type] = null;\n    this.trigger('pendingtimelinechange');\n  };\n\n  _proto.pendingTimelineChange = function pendingTimelineChange(_ref) {\n    var type = _ref.type,\n        from = _ref.from,\n        to = _ref.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.pendingTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      this.trigger('pendingtimelinechange');\n    }\n\n    return this.pendingTimelineChanges_[type];\n  };\n\n  _proto.lastTimelineChange = function lastTimelineChange(_ref2) {\n    var type = _ref2.type,\n        from = _ref2.from,\n        to = _ref2.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.lastTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      delete this.pendingTimelineChanges_[type];\n      this.trigger('timelinechange');\n    }\n\n    return this.lastTimelineChanges_[type];\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.pendingTimelineChanges_ = {};\n    this.lastTimelineChanges_ = {};\n    this.off();\n  };\n\n  return TimelineChangeController;\n}(videojs.EventTarget);\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n\nvar workerCode = transform(getWorkerString(function () {\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\n  function createCommonjsModule(fn, basedir, module) {\n    return module = {\n      path: basedir,\n      exports: {},\n      require: function require(path, base) {\n        return commonjsRequire(path, base === undefined || base === null ? module.path : base);\n      }\n    }, fn(module, module.exports), module.exports;\n  }\n\n  function commonjsRequire() {\n    throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');\n  }\n\n  var createClass = createCommonjsModule(function (module) {\n    function _defineProperties(target, props) {\n      for (var i = 0; i < props.length; i++) {\n        var descriptor = props[i];\n        descriptor.enumerable = descriptor.enumerable || false;\n        descriptor.configurable = true;\n        if (\"value\" in descriptor) descriptor.writable = true;\n        Object.defineProperty(target, descriptor.key, descriptor);\n      }\n    }\n\n    function _createClass(Constructor, protoProps, staticProps) {\n      if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n      if (staticProps) _defineProperties(Constructor, staticProps);\n      return Constructor;\n    }\n\n    module.exports = _createClass;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var setPrototypeOf = createCommonjsModule(function (module) {\n    function _setPrototypeOf(o, p) {\n      module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n        o.__proto__ = p;\n        return o;\n      };\n\n      module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n      return _setPrototypeOf(o, p);\n    }\n\n    module.exports = _setPrototypeOf;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var inheritsLoose = createCommonjsModule(function (module) {\n    function _inheritsLoose(subClass, superClass) {\n      subClass.prototype = Object.create(superClass.prototype);\n      subClass.prototype.constructor = subClass;\n      setPrototypeOf(subClass, superClass);\n    }\n\n    module.exports = _inheritsLoose;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  /**\n   * @file stream.js\n   */\n\n  /**\n   * A lightweight readable stream implemention that handles event dispatching.\n   *\n   * @class Stream\n   */\n\n  var Stream = /*#__PURE__*/function () {\n    function Stream() {\n      this.listeners = {};\n    }\n    /**\n     * Add a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener the callback to be invoked when an event of\n     * the specified type occurs\n     */\n\n\n    var _proto = Stream.prototype;\n\n    _proto.on = function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n\n      this.listeners[type].push(listener);\n    }\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {boolean} if we could turn it off or not\n     */\n    ;\n\n    _proto.off = function off(type, listener) {\n      if (!this.listeners[type]) {\n        return false;\n      }\n\n      var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n      // In Video.js we slice listener functions\n      // on trigger so that it does not mess up the order\n      // while we loop through.\n      //\n      // Here we slice on off so that the loop in trigger\n      // can continue using it's old reference to loop without\n      // messing up the order.\n\n      this.listeners[type] = this.listeners[type].slice(0);\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {string} type the event name\n     */\n    ;\n\n    _proto.trigger = function trigger(type) {\n      var callbacks = this.listeners[type];\n\n      if (!callbacks) {\n        return;\n      } // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n\n\n      if (arguments.length === 2) {\n        var length = callbacks.length;\n\n        for (var i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        var args = Array.prototype.slice.call(arguments, 1);\n        var _length = callbacks.length;\n\n        for (var _i = 0; _i < _length; ++_i) {\n          callbacks[_i].apply(this, args);\n        }\n      }\n    }\n    /**\n     * Destroys the stream and cleans up.\n     */\n    ;\n\n    _proto.dispose = function dispose() {\n      this.listeners = {};\n    }\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n    ;\n\n    _proto.pipe = function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    };\n\n    return Stream;\n  }();\n  /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */\n\n  /**\n   * Returns the subarray of a Uint8Array without PKCS#7 padding.\n   *\n   * @param padded {Uint8Array} unencrypted bytes that have been padded\n   * @return {Uint8Array} the unpadded bytes\n   * @see http://tools.ietf.org/html/rfc5652\n   */\n\n\n  function unpad(padded) {\n    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n  }\n  /*! @name aes-decrypter @version 3.1.3 @license Apache-2.0 */\n\n  /**\n   * @file aes.js\n   *\n   * This file contains an adaptation of the AES decryption algorithm\n   * from the Standford Javascript Cryptography Library. That work is\n   * covered by the following copyright and permissions notice:\n   *\n   * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n   * All rights reserved.\n   *\n   * Redistribution and use in source and binary forms, with or without\n   * modification, are permitted provided that the following conditions are\n   * met:\n   *\n   * 1. Redistributions of source code must retain the above copyright\n   *    notice, this list of conditions and the following disclaimer.\n   *\n   * 2. Redistributions in binary form must reproduce the above\n   *    copyright notice, this list of conditions and the following\n   *    disclaimer in the documentation and/or other materials provided\n   *    with the distribution.\n   *\n   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n   *\n   * The views and conclusions contained in the software and documentation\n   * are those of the authors and should not be interpreted as representing\n   * official policies, either expressed or implied, of the authors.\n   */\n\n  /**\n   * Expand the S-box tables.\n   *\n   * @private\n   */\n\n\n  var precompute = function precompute() {\n    var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n    var encTable = tables[0];\n    var decTable = tables[1];\n    var sbox = encTable[4];\n    var sboxInv = decTable[4];\n    var i;\n    var x;\n    var xInv;\n    var d = [];\n    var th = [];\n    var x2;\n    var x4;\n    var x8;\n    var s;\n    var tEnc;\n    var tDec; // Compute double and third tables\n\n    for (i = 0; i < 256; i++) {\n      th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n    }\n\n    for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n      // Compute sbox\n      s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n      s = s >> 8 ^ s & 255 ^ 99;\n      sbox[x] = s;\n      sboxInv[s] = x; // Compute MixColumns\n\n      x8 = d[x4 = d[x2 = d[x]]];\n      tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n      tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n      for (i = 0; i < 4; i++) {\n        encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n        decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n      }\n    } // Compactify. Considerable speedup on Firefox.\n\n\n    for (i = 0; i < 5; i++) {\n      encTable[i] = encTable[i].slice(0);\n      decTable[i] = decTable[i].slice(0);\n    }\n\n    return tables;\n  };\n\n  var aesTables = null;\n  /**\n   * Schedule out an AES key for both encryption and decryption. This\n   * is a low-level class. Use a cipher mode to do bulk encryption.\n   *\n   * @class AES\n   * @param key {Array} The key as an array of 4, 6 or 8 words.\n   */\n\n  var AES = /*#__PURE__*/function () {\n    function AES(key) {\n      /**\n      * The expanded S-box and inverse S-box tables. These will be computed\n      * on the client so that we don't have to send them down the wire.\n      *\n      * There are two tables, _tables[0] is for encryption and\n      * _tables[1] is for decryption.\n      *\n      * The first 4 sub-tables are the expanded S-box with MixColumns. The\n      * last (_tables[01][4]) is the S-box itself.\n      *\n      * @private\n      */\n      // if we have yet to precompute the S-box tables\n      // do so now\n      if (!aesTables) {\n        aesTables = precompute();\n      } // then make a copy of that object for use\n\n\n      this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n      var i;\n      var j;\n      var tmp;\n      var sbox = this._tables[0][4];\n      var decTable = this._tables[1];\n      var keyLen = key.length;\n      var rcon = 1;\n\n      if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n        throw new Error('Invalid aes key size');\n      }\n\n      var encKey = key.slice(0);\n      var decKey = [];\n      this._key = [encKey, decKey]; // schedule encryption keys\n\n      for (i = keyLen; i < 4 * keyLen + 28; i++) {\n        tmp = encKey[i - 1]; // apply sbox\n\n        if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n          tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n          if (i % keyLen === 0) {\n            tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n            rcon = rcon << 1 ^ (rcon >> 7) * 283;\n          }\n        }\n\n        encKey[i] = encKey[i - keyLen] ^ tmp;\n      } // schedule decryption keys\n\n\n      for (j = 0; i; j++, i--) {\n        tmp = encKey[j & 3 ? i : i - 4];\n\n        if (i <= 4 || j < 4) {\n          decKey[j] = tmp;\n        } else {\n          decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n        }\n      }\n    }\n    /**\n     * Decrypt 16 bytes, specified as four 32-bit words.\n     *\n     * @param {number} encrypted0 the first word to decrypt\n     * @param {number} encrypted1 the second word to decrypt\n     * @param {number} encrypted2 the third word to decrypt\n     * @param {number} encrypted3 the fourth word to decrypt\n     * @param {Int32Array} out the array to write the decrypted words\n     * into\n     * @param {number} offset the offset into the output array to start\n     * writing results\n     * @return {Array} The plaintext.\n     */\n\n\n    var _proto = AES.prototype;\n\n    _proto.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n      var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n      var a = encrypted0 ^ key[0];\n      var b = encrypted3 ^ key[1];\n      var c = encrypted2 ^ key[2];\n      var d = encrypted1 ^ key[3];\n      var a2;\n      var b2;\n      var c2; // key.length === 2 ?\n\n      var nInnerRounds = key.length / 4 - 2;\n      var i;\n      var kIndex = 4;\n      var table = this._tables[1]; // load up the tables\n\n      var table0 = table[0];\n      var table1 = table[1];\n      var table2 = table[2];\n      var table3 = table[3];\n      var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n      for (i = 0; i < nInnerRounds; i++) {\n        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n        kIndex += 4;\n        a = a2;\n        b = b2;\n        c = c2;\n      } // Last round.\n\n\n      for (i = 0; i < 4; i++) {\n        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n        a2 = a;\n        a = b;\n        b = c;\n        c = d;\n        d = a2;\n      }\n    };\n\n    return AES;\n  }();\n  /**\n   * A wrapper around the Stream class to use setTimeout\n   * and run stream \"jobs\" Asynchronously\n   *\n   * @class AsyncStream\n   * @extends Stream\n   */\n\n\n  var AsyncStream = /*#__PURE__*/function (_Stream) {\n    inheritsLoose(AsyncStream, _Stream);\n\n    function AsyncStream() {\n      var _this;\n\n      _this = _Stream.call(this, Stream) || this;\n      _this.jobs = [];\n      _this.delay = 1;\n      _this.timeout_ = null;\n      return _this;\n    }\n    /**\n     * process an async job\n     *\n     * @private\n     */\n\n\n    var _proto = AsyncStream.prototype;\n\n    _proto.processJob_ = function processJob_() {\n      this.jobs.shift()();\n\n      if (this.jobs.length) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      } else {\n        this.timeout_ = null;\n      }\n    }\n    /**\n     * push a job into the stream\n     *\n     * @param {Function} job the job to push into the stream\n     */\n    ;\n\n    _proto.push = function push(job) {\n      this.jobs.push(job);\n\n      if (!this.timeout_) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      }\n    };\n\n    return AsyncStream;\n  }(Stream);\n  /**\n   * Convert network-order (big-endian) bytes into their little-endian\n   * representation.\n   */\n\n\n  var ntoh = function ntoh(word) {\n    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n  };\n  /**\n   * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * use for the first round of CBC.\n   * @return {Uint8Array} the decrypted bytes\n   *\n   * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n   * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n   * @see https://tools.ietf.org/html/rfc2315\n   */\n\n\n  var decrypt = function decrypt(encrypted, key, initVector) {\n    // word-level access to the encrypted bytes\n    var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n    var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n    // decrypted data\n\n    var init0;\n    var init1;\n    var init2;\n    var init3;\n    var encrypted0;\n    var encrypted1;\n    var encrypted2;\n    var encrypted3; // iteration variable\n\n    var wordIx; // pull out the words of the IV to ensure we don't modify the\n    // passed-in reference and easier access\n\n    init0 = initVector[0];\n    init1 = initVector[1];\n    init2 = initVector[2];\n    init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n    // to each decrypted block\n\n    for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n      // convert big-endian (network order) words into little-endian\n      // (javascript order)\n      encrypted0 = ntoh(encrypted32[wordIx]);\n      encrypted1 = ntoh(encrypted32[wordIx + 1]);\n      encrypted2 = ntoh(encrypted32[wordIx + 2]);\n      encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n      decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n      // plaintext\n\n      decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n      decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n      decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n      decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n      init0 = encrypted0;\n      init1 = encrypted1;\n      init2 = encrypted2;\n      init3 = encrypted3;\n    }\n\n    return decrypted;\n  };\n  /**\n   * The `Decrypter` class that manages decryption of AES\n   * data through `AsyncStream` objects and the `decrypt`\n   * function\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * @param {Function} done the function to run when done\n   * @class Decrypter\n   */\n\n\n  var Decrypter = /*#__PURE__*/function () {\n    function Decrypter(encrypted, key, initVector, done) {\n      var step = Decrypter.STEP;\n      var encrypted32 = new Int32Array(encrypted.buffer);\n      var decrypted = new Uint8Array(encrypted.byteLength);\n      var i = 0;\n      this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n      for (i = step; i < encrypted32.length; i += step) {\n        initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n      } // invoke the done() callback when everything is finished\n\n\n      this.asyncStream_.push(function () {\n        // remove pkcs#7 padding from the decrypted bytes\n        done(null, unpad(decrypted));\n      });\n    }\n    /**\n     * a getter for step the maximum number of bytes to process at one time\n     *\n     * @return {number} the value of step 32000\n     */\n\n\n    var _proto = Decrypter.prototype;\n    /**\n     * @private\n     */\n\n    _proto.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n      return function () {\n        var bytes = decrypt(encrypted, key, initVector);\n        decrypted.set(bytes, encrypted.byteOffset);\n      };\n    };\n\n    createClass(Decrypter, null, [{\n      key: \"STEP\",\n      get: function get() {\n        // 4 * 8000;\n        return 32000;\n      }\n    }]);\n    return Decrypter;\n  }();\n\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n\n  var isArrayBufferView = function isArrayBufferView(obj) {\n    if (ArrayBuffer.isView === 'function') {\n      return ArrayBuffer.isView(obj);\n    }\n\n    return obj && obj.buffer instanceof ArrayBuffer;\n  };\n\n  var BigInt = window_1.BigInt || Number;\n  [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\n  /**\n   * Creates an object for sending to a web worker modifying properties that are TypedArrays\n   * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n   *\n   * @param {Object} message\n   *        Object of properties and values to send to the web worker\n   * @return {Object}\n   *         Modified message with TypedArray values expanded\n   * @function createTransferableMessage\n   */\n\n\n  var createTransferableMessage = function createTransferableMessage(message) {\n    var transferable = {};\n    Object.keys(message).forEach(function (key) {\n      var value = message[key];\n\n      if (isArrayBufferView(value)) {\n        transferable[key] = {\n          bytes: value.buffer,\n          byteOffset: value.byteOffset,\n          byteLength: value.byteLength\n        };\n      } else {\n        transferable[key] = value;\n      }\n    });\n    return transferable;\n  };\n  /* global self */\n\n  /**\n   * Our web worker interface so that things can talk to aes-decrypter\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   */\n\n\n  self.onmessage = function (event) {\n    var data = event.data;\n    var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n    var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n    var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n    /* eslint-disable no-new, handle-callback-err */\n\n    new Decrypter(encrypted, key, iv, function (err, bytes) {\n      self.postMessage(createTransferableMessage({\n        source: data.source,\n        decrypted: bytes\n      }), [bytes.buffer]);\n    });\n    /* eslint-enable */\n  };\n}));\nvar Decrypter = factory(workerCode);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties[\"default\"] ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\n\n\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\n\n\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\n\n\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad[type],\n        mainSegmentLoader = _settings$segmentLoad.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastGroup = mediaType.lastGroup_; // the group did not change do nothing\n\n    if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup || activeGroup.isMasterPlaylist) {\n      // there is no group active or active group is a main playlist and won't change\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n\n      return;\n    } // Non-destructive resync\n\n\n    segmentLoader.resyncLoader();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onGroupChanging = function onGroupChanging(type, settings) {\n  return function () {\n    var segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    mediaType.lastGroup_ = null;\n    segmentLoader.abort();\n    segmentLoader.pause();\n  };\n};\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\n\n\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        _settings$segmentLoad2 = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad2[type],\n        mainSegmentLoader = _settings$segmentLoad2.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastTrack = mediaType.lastTrack_; // track did not change, do nothing\n\n    if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (activeGroup.isMasterPlaylist) {\n      // track did not change, do nothing\n      if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {\n        return;\n      }\n\n      var mpc = settings.vhs.masterPlaylistController_;\n      var newPlaylist = mpc.selectPlaylist(); // media will not change do nothing\n\n      if (mpc.media() === newPlaylist) {\n        return;\n      }\n\n      mediaType.logger_(\"track change. Switching master audio from \" + lastTrack.id + \" to \" + activeTrack.id);\n      masterPlaylistLoader.pause();\n      mainSegmentLoader.resetEverything();\n      mpc.fastQualityChange_(newPlaylist);\n      return;\n    }\n\n    if (type === 'AUDIO') {\n      if (!activeGroup.playlistLoader) {\n        // when switching from demuxed audio/video to muxed audio/video (noted by no\n        // playlist loader for the audio group), we want to do a destructive reset of the\n        // main segment loader and not restart the audio loaders\n        mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since\n        // it should be stopped\n\n        mainSegmentLoader.resetEverything();\n        return;\n      } // although the segment loader is an audio segment loader, call the setAudio\n      // function to ensure it is prepared to re-append the init segment (or handle other\n      // config changes)\n\n\n      segmentLoader.setAudio(true);\n      mainSegmentLoader.setAudio(false);\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    } // destructive reset\n\n\n    segmentLoader.resetEverything();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type],\n          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n      stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group[\"default\"];\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type];\n      videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n      stopLoaders(segmentLoader, mediaType);\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$ = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$.groups,\n        tracks = _settings$mediaTypes$.tracks,\n        logger_ = _settings$mediaTypes$.logger_,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n    var audioOnlyMaster = isAudioOnly(masterPlaylistLoader.master); // force a default if we have none\n\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n      mediaGroups[type] = {\n        main: {\n          \"default\": {\n            \"default\": true\n          }\n        }\n      };\n\n      if (audioOnlyMaster) {\n        mediaGroups[type].main[\"default\"].playlists = masterPlaylistLoader.master.playlists;\n      }\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (audioOnlyMaster) {\n          logger_(\"AUDIO group '\" + groupId + \"' label '\" + variantLabel + \"' is a master playlist\");\n          properties.isMasterPlaylist = true;\n          playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,\n          // use the resolved media playlist object\n        } else if (sourceType === 'vhs-json' && properties.playlists) {\n          playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);\n        } else if (properties.resolvedUri) {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists\n          // should we even have properties.playlists in this check.\n        } else if (properties.playlists && sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new videojs.AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            \"default\": properties[\"default\"],\n            label: variantLabel\n          });\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech,\n        vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$2 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$2.groups,\n        tracks = _settings$mediaTypes$2.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (sourceType === 'hls') {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);\n        } else if (sourceType === 'dash') {\n          var playlists = properties.playlists.filter(function (p) {\n            return p.excludeUntil !== Infinity;\n          });\n\n          if (!playlists.length) {\n            return;\n          }\n\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else if (sourceType === 'vhs-json') {\n          playlistLoader = new PlaylistLoader( // if the vhs-json object included the media playlist, use the media playlist\n          // as provided, otherwise use the resolved URI to load the playlist\n          properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            \"default\": properties[\"default\"] && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$3 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$3.groups,\n        tracks = _settings$mediaTypes$3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services\n\n        if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {\n          continue;\n        }\n\n        var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n        var newProps = {\n          label: variantLabel,\n          language: properties.language,\n          instreamId: properties.instreamId,\n          \"default\": properties[\"default\"] && properties.autoselect\n        };\n\n        if (captionServices[newProps.instreamId]) {\n          newProps = videojs.mergeOptions(newProps, captionServices[newProps.instreamId]);\n        }\n\n        if (newProps[\"default\"] === undefined) {\n          delete newProps[\"default\"];\n        } // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n\n\n        groups[groupId].push(videojs.mergeOptions({\n          id: variantLabel\n        }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: newProps.instreamId,\n            kind: 'captions',\n            \"default\": newProps[\"default\"],\n            language: newProps.language,\n            label: newProps.label\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n\nvar groupMatch = function groupMatch(list, media) {\n  for (var i = 0; i < list.length; i++) {\n    if (playlistMatch(media, list[i])) {\n      return true;\n    }\n\n    if (list[i].playlists && groupMatch(list[i].playlists, media)) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\n\n\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        groups = settings.mediaTypes[type].groups;\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null; // set to variants to main media active group\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    var groupKeys = Object.keys(groups);\n\n    if (!variants) {\n      // find the masterPlaylistLoader media\n      // that is in a media group if we are dealing\n      // with audio only\n      if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.master)) {\n        for (var i = 0; i < groupKeys.length; i++) {\n          var groupPropertyList = groups[groupKeys[i]];\n\n          if (groupMatch(groupPropertyList, media)) {\n            variants = groupPropertyList;\n            break;\n          }\n        } // use the main group if it exists\n\n      } else if (groups.main) {\n        variants = groups.main; // only one group, use that one\n      } else if (groupKeys.length === 1) {\n        variants = groups[groupKeys[0]];\n      }\n    }\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null || !variants) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\n\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\n\nvar getActiveGroup = function getActiveGroup(type, _ref) {\n  var mediaTypes = _ref.mediaTypes;\n  return function () {\n    var activeTrack_ = mediaTypes[type].activeTrack();\n\n    if (!activeTrack_) {\n      return null;\n    }\n\n    return mediaTypes[type].activeGroup(activeTrack_);\n  };\n};\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {VhsHandler} settings.vhs\n *        VHS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\n\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n  var mediaTypes = settings.mediaTypes,\n      masterPlaylistLoader = settings.masterPlaylistLoader,\n      tech = settings.tech,\n      vhs = settings.vhs,\n      _settings$segmentLoad3 = settings.segmentLoaders,\n      audioSegmentLoader = _settings$segmentLoad3['AUDIO'],\n      mainSegmentLoader = _settings$segmentLoad3.main; // setup active group and track getters and change event handlers\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n    mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);\n  }); // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n\n  if (audioGroup) {\n    var groupId = (audioGroup.filter(function (group) {\n      return group[\"default\"];\n    })[0] || audioGroup[0]).id;\n    mediaTypes.AUDIO.tracks[groupId].enabled = true;\n    mediaTypes.AUDIO.onGroupChanged();\n    mediaTypes.AUDIO.onTrackChanged();\n    var activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the\n    // track is changed, but needs to be handled here since the track may not be considered\n    // changed on the first call to onTrackChanged\n\n    if (!activeAudioGroup.playlistLoader) {\n      // either audio is muxed with video or the stream is audio only\n      mainSegmentLoader.setAudio(true);\n    } else {\n      // audio is demuxed\n      mainSegmentLoader.setAudio(false);\n      audioSegmentLoader.setAudio(true);\n    }\n  }\n\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  });\n  masterPlaylistLoader.on('mediachanging', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanging();\n    });\n  }); // custom audio track change event handler for usage event\n\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-audio-change'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-audio-change'\n    });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  vhs.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  }); // clear existing audio tracks and add the ones we just created\n\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\n\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      getActiveGroup: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop,\n      lastTrack_: null,\n      logger_: logger(\"MediaGroups[\" + type + \"]\")\n    };\n  });\n  return mediaTypes;\n};\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\nvar Vhs$1; // SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\n\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];\n\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n\nvar shouldSwitchToMedia = function shouldSwitchToMedia(_ref) {\n  var currentPlaylist = _ref.currentPlaylist,\n      buffered = _ref.buffered,\n      currentTime = _ref.currentTime,\n      nextPlaylist = _ref.nextPlaylist,\n      bufferLowWaterLine = _ref.bufferLowWaterLine,\n      bufferHighWaterLine = _ref.bufferHighWaterLine,\n      duration = _ref.duration,\n      experimentalBufferBasedABR = _ref.experimentalBufferBasedABR,\n      log = _ref.log; // we have no other playlist to switch to\n\n  if (!nextPlaylist) {\n    videojs.log.warn('We received no playlist to switch to. Please check your stream.');\n    return false;\n  }\n\n  var sharedLogLine = \"allowing switch \" + (currentPlaylist && currentPlaylist.id || 'null') + \" -> \" + nextPlaylist.id;\n\n  if (!currentPlaylist) {\n    log(sharedLogLine + \" as current playlist is not set\");\n    return true;\n  } // no need to switch if playlist is the same\n\n\n  if (nextPlaylist.id === currentPlaylist.id) {\n    return false;\n  } // determine if current time is in a buffered range.\n\n\n  var isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.\n  // This is because in LIVE, the player plays 3 segments from the end of the\n  // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n  // in those segments, a viewer will never experience a rendition upswitch.\n\n  if (!currentPlaylist.endList) {\n    // For LLHLS live streams, don't switch renditions before playback has started, as it almost\n    // doubles the time to first playback.\n    if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {\n      log(\"not \" + sharedLogLine + \" as current playlist is live llhls, but currentTime isn't in buffered.\");\n      return false;\n    }\n\n    log(sharedLogLine + \" as current playlist is live\");\n    return true;\n  }\n\n  var forwardBuffer = timeAheadOf(buffered, currentTime);\n  var maxBufferLowWaterLine = experimentalBufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD\n  // duration is below the max potential low water line\n\n  if (duration < maxBufferLowWaterLine) {\n    log(sharedLogLine + \" as duration < max low water line (\" + duration + \" < \" + maxBufferLowWaterLine + \")\");\n    return true;\n  }\n\n  var nextBandwidth = nextPlaylist.attributes.BANDWIDTH;\n  var currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,\n  // we can switch down\n\n  if (nextBandwidth < currBandwidth && (!experimentalBufferBasedABR || forwardBuffer < bufferHighWaterLine)) {\n    var logLine = sharedLogLine + \" as next bandwidth < current bandwidth (\" + nextBandwidth + \" < \" + currBandwidth + \")\";\n\n    if (experimentalBufferBasedABR) {\n      logLine += \" and forwardBuffer < bufferHighWaterLine (\" + forwardBuffer + \" < \" + bufferHighWaterLine + \")\";\n    }\n\n    log(logLine);\n    return true;\n  } // and if our buffer is higher than the low water line,\n  // we can switch up\n\n\n  if ((!experimentalBufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {\n    var _logLine = sharedLogLine + \" as forwardBuffer >= bufferLowWaterLine (\" + forwardBuffer + \" >= \" + bufferLowWaterLine + \")\";\n\n    if (experimentalBufferBasedABR) {\n      _logLine += \" and next bandwidth > current bandwidth (\" + nextBandwidth + \" > \" + currBandwidth + \")\";\n    }\n\n    log(_logLine);\n    return true;\n  }\n\n  log(\"not \" + sharedLogLine + \" as no switching criteria met\");\n  return false;\n};\n/**\n * the master playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\n\nvar MasterPlaylistController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    var src = options.src,\n        handleManifestRedirects = options.handleManifestRedirects,\n        withCredentials = options.withCredentials,\n        tech = options.tech,\n        bandwidth = options.bandwidth,\n        externVhs = options.externVhs,\n        useCueTags = options.useCueTags,\n        blacklistDuration = options.blacklistDuration,\n        enableLowInitialPlaylist = options.enableLowInitialPlaylist,\n        sourceType = options.sourceType,\n        cacheEncryptionKeys = options.cacheEncryptionKeys,\n        experimentalBufferBasedABR = options.experimentalBufferBasedABR,\n        experimentalLeastPixelDiffSelector = options.experimentalLeastPixelDiffSelector,\n        captionServices = options.captionServices;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or JSON manifest string is required');\n    }\n\n    var maxPlaylistRetries = options.maxPlaylistRetries;\n\n    if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {\n      maxPlaylistRetries = Infinity;\n    }\n\n    Vhs$1 = externVhs;\n    _this.experimentalBufferBasedABR = Boolean(experimentalBufferBasedABR);\n    _this.experimentalLeastPixelDiffSelector = Boolean(experimentalLeastPixelDiffSelector);\n    _this.withCredentials = withCredentials;\n    _this.tech_ = tech;\n    _this.vhs_ = tech.vhs;\n    _this.sourceType_ = sourceType;\n    _this.useCueTags_ = useCueTags;\n    _this.blacklistDuration = blacklistDuration;\n    _this.maxPlaylistRetries = maxPlaylistRetries;\n    _this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (_this.useCueTags_) {\n      _this.cueTagsTrack_ = _this.tech_.addTextTrack('metadata', 'ad-cues');\n      _this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    _this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      maxPlaylistRetries: maxPlaylistRetries,\n      timeout: null\n    };\n\n    _this.on('error', _this.pauseLoading);\n\n    _this.mediaTypes_ = createMediaTypes();\n    _this.mediaSource = new window$1.MediaSource();\n    _this.handleDurationChange_ = _this.handleDurationChange_.bind(_assertThisInitialized(_this));\n    _this.handleSourceOpen_ = _this.handleSourceOpen_.bind(_assertThisInitialized(_this));\n    _this.handleSourceEnded_ = _this.handleSourceEnded_.bind(_assertThisInitialized(_this));\n\n    _this.mediaSource.addEventListener('durationchange', _this.handleDurationChange_); // load the media source into the player\n\n\n    _this.mediaSource.addEventListener('sourceopen', _this.handleSourceOpen_);\n\n    _this.mediaSource.addEventListener('sourceended', _this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of\n    // everything, and the MediaSource should not be detached without a proper disposal\n\n\n    _this.seekable_ = videojs.createTimeRanges();\n    _this.hasPlayed_ = false;\n    _this.syncController_ = new SyncController(options);\n    _this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n    _this.decrypter_ = new Decrypter();\n    _this.sourceUpdater_ = new SourceUpdater(_this.mediaSource);\n    _this.inbandTextTracks_ = {};\n    _this.timelineChangeController_ = new TimelineChangeController();\n    var segmentLoaderSettings = {\n      vhs: _this.vhs_,\n      parse708captions: options.parse708captions,\n      useDtsForTimestampOffset: options.useDtsForTimestampOffset,\n      captionServices: captionServices,\n      mediaSource: _this.mediaSource,\n      currentTime: _this.tech_.currentTime.bind(_this.tech_),\n      seekable: function seekable() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration() {\n        return _this.duration();\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_;\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: _this.syncController_,\n      decrypter: _this.decrypter_,\n      sourceType: _this.sourceType_,\n      inbandTextTracks: _this.inbandTextTracks_,\n      cacheEncryptionKeys: cacheEncryptionKeys,\n      sourceUpdater: _this.sourceUpdater_,\n      timelineChangeController: _this.timelineChangeController_,\n      experimentalExactManifestTimings: options.experimentalExactManifestTimings\n    }; // The source type check not only determines whether a special DASH playlist loader\n    // should be used, but also covers the case where the provided src is a vhs-json\n    // manifest object (instead of a URL). In the case of vhs-json, the default\n    // PlaylistLoader should be used.\n\n    _this.masterPlaylistLoader_ = _this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, _this.vhs_, _this.requestOptions_) : new PlaylistLoader(src, _this.vhs_, _this.requestOptions_);\n\n    _this.setupMasterPlaylistLoaderListeners_(); // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n\n\n    _this.mainSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: _this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options); // alternate audio track\n\n    _this.audioSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n    _this.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt',\n      featuresNativeTextTracks: _this.tech_.featuresNativeTextTracks,\n      loadVttJs: function loadVttJs() {\n        return new Promise(function (resolve, reject) {\n          function onLoad() {\n            tech.off('vttjserror', onError);\n            resolve();\n          }\n\n          function onError() {\n            tech.off('vttjsloaded', onLoad);\n            reject();\n          }\n\n          tech.one('vttjsloaded', onLoad);\n          tech.one('vttjserror', onError); // safe to call multiple times, script will be loaded only once:\n\n          tech.addWebVttScript_();\n        });\n      }\n    }), options);\n\n    _this.setupSegmentLoaderListeners_();\n\n    if (_this.experimentalBufferBasedABR) {\n      _this.masterPlaylistLoader_.one('loadedplaylist', function () {\n        return _this.startABRTimer_();\n      });\n\n      _this.tech_.on('pause', function () {\n        return _this.stopABRTimer_();\n      });\n\n      _this.tech_.on('play', function () {\n        return _this.startABRTimer_();\n      });\n    } // Create SegmentLoader stat-getters\n    // mediaRequests_\n    // mediaRequestsAborted_\n    // mediaRequestsTimedout_\n    // mediaRequestsErrored_\n    // mediaTransferDuration_\n    // mediaBytesTransferred_\n    // mediaAppends_\n\n\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_assertThisInitialized(_this), stat);\n    });\n    _this.logger_ = logger('MPC');\n    _this.triggeredFmp4Usage = false;\n\n    if (_this.tech_.preload() === 'none') {\n      _this.loadOnPlay_ = function () {\n        _this.loadOnPlay_ = null;\n\n        _this.masterPlaylistLoader_.load();\n      };\n\n      _this.tech_.one('play', _this.loadOnPlay_);\n    } else {\n      _this.masterPlaylistLoader_.load();\n    }\n\n    _this.timeToLoadedData__ = -1;\n    _this.mainAppendsToLoadedData__ = -1;\n    _this.audioAppendsToLoadedData__ = -1;\n    var event = _this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)\n\n    _this.tech_.one(event, function () {\n      var timeToLoadedDataStart = Date.now();\n\n      _this.tech_.one('loadeddata', function () {\n        _this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;\n        _this.mainAppendsToLoadedData__ = _this.mainSegmentLoader_.mediaAppends;\n        _this.audioAppendsToLoadedData__ = _this.audioSegmentLoader_.mediaAppends;\n      });\n    });\n\n    return _this;\n  }\n\n  var _proto = MasterPlaylistController.prototype;\n\n  _proto.mainAppendsToLoadedData_ = function mainAppendsToLoadedData_() {\n    return this.mainAppendsToLoadedData__;\n  };\n\n  _proto.audioAppendsToLoadedData_ = function audioAppendsToLoadedData_() {\n    return this.audioAppendsToLoadedData__;\n  };\n\n  _proto.appendsToLoadedData_ = function appendsToLoadedData_() {\n    var main = this.mainAppendsToLoadedData_();\n    var audio = this.audioAppendsToLoadedData_();\n\n    if (main === -1 || audio === -1) {\n      return -1;\n    }\n\n    return main + audio;\n  };\n\n  _proto.timeToLoadedData_ = function timeToLoadedData_() {\n    return this.timeToLoadedData__;\n  }\n  /**\n   * Run selectPlaylist and switch to the new playlist if we should\n   *\n   * @param {string} [reason=abr] a reason for why the ABR check is made\n   * @private\n   */\n  ;\n\n  _proto.checkABR_ = function checkABR_(reason) {\n    if (reason === void 0) {\n      reason = 'abr';\n    }\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {\n      this.switchMedia_(nextPlaylist, reason);\n    }\n  };\n\n  _proto.switchMedia_ = function switchMedia_(playlist, cause, delay) {\n    var oldMedia = this.media();\n    var oldId = oldMedia && (oldMedia.id || oldMedia.uri);\n    var newId = playlist.id || playlist.uri;\n\n    if (oldId && oldId !== newId) {\n      this.logger_(\"switch media \" + oldId + \" -> \" + newId + \" from \" + cause);\n      this.tech_.trigger({\n        type: 'usage',\n        name: \"vhs-rendition-change-\" + cause\n      });\n    }\n\n    this.masterPlaylistLoader_.media(playlist, delay);\n  }\n  /**\n   * Start a timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.startABRTimer_ = function startABRTimer_() {\n    var _this2 = this;\n\n    this.stopABRTimer_();\n    this.abrTimer_ = window$1.setInterval(function () {\n      return _this2.checkABR_();\n    }, 250);\n  }\n  /**\n   * Stop the timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.stopABRTimer_ = function stopABRTimer_() {\n    // if we're scrubbing, we don't need to pause.\n    // This getter will be added to Video.js in version 7.11.\n    if (this.tech_.scrubbing && this.tech_.scrubbing()) {\n      return;\n    }\n\n    window$1.clearInterval(this.abrTimer_);\n    this.abrTimer_ = null;\n  }\n  /**\n   * Get a list of playlists for the currently selected audio playlist\n   *\n   * @return {Array} the array of audio playlists\n   */\n  ;\n\n  _proto.getAudioTrackPlaylists_ = function getAudioTrackPlaylists_() {\n    var master = this.master();\n    var defaultPlaylists = master && master.playlists || []; // if we don't have any audio groups then we can only\n    // assume that the audio tracks are contained in masters\n    // playlist array, use that or an empty array.\n\n    if (!master || !master.mediaGroups || !master.mediaGroups.AUDIO) {\n      return defaultPlaylists;\n    }\n\n    var AUDIO = master.mediaGroups.AUDIO;\n    var groupKeys = Object.keys(AUDIO);\n    var track; // get the current active track\n\n    if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {\n      track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from master if mediaTypes_ isn't setup yet\n    } else {\n      // default group is `main` or just the first group.\n      var defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];\n\n      for (var label in defaultGroup) {\n        if (defaultGroup[label][\"default\"]) {\n          track = {\n            label: label\n          };\n          break;\n        }\n      }\n    } // no active track no playlists.\n\n\n    if (!track) {\n      return defaultPlaylists;\n    }\n\n    var playlists = []; // get all of the playlists that are possible for the\n    // active track.\n\n    for (var group in AUDIO) {\n      if (AUDIO[group][track.label]) {\n        var properties = AUDIO[group][track.label];\n\n        if (properties.playlists && properties.playlists.length) {\n          playlists.push.apply(playlists, properties.playlists);\n        } else if (properties.uri) {\n          playlists.push(properties);\n        } else if (master.playlists.length) {\n          // if an audio group does not have a uri\n          // see if we have main playlists that use it as a group.\n          // if we do then add those to the playlists list.\n          for (var i = 0; i < master.playlists.length; i++) {\n            var playlist = master.playlists[i];\n\n            if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {\n              playlists.push(playlist);\n            }\n          }\n        }\n      }\n    }\n\n    if (!playlists.length) {\n      return defaultPlaylists;\n    }\n\n    return playlists;\n  }\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupMasterPlaylistLoaderListeners_ = function setupMasterPlaylistLoaderListeners_() {\n    var _this3 = this;\n\n    this.masterPlaylistLoader_.on('loadedmetadata', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      } // if this isn't a live video and preload permits, start\n      // downloading segments\n\n\n      if (media.endList && _this3.tech_.preload() !== 'none') {\n        _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n        _this3.mainSegmentLoader_.load();\n      }\n\n      setupMediaGroups({\n        sourceType: _this3.sourceType_,\n        segmentLoaders: {\n          AUDIO: _this3.audioSegmentLoader_,\n          SUBTITLES: _this3.subtitleSegmentLoader_,\n          main: _this3.mainSegmentLoader_\n        },\n        tech: _this3.tech_,\n        requestOptions: _this3.requestOptions_,\n        masterPlaylistLoader: _this3.masterPlaylistLoader_,\n        vhs: _this3.vhs_,\n        master: _this3.master(),\n        mediaTypes: _this3.mediaTypes_,\n        blacklistCurrentPlaylist: _this3.blacklistCurrentPlaylist.bind(_this3)\n      });\n\n      _this3.triggerPresenceUsage_(_this3.master(), media);\n\n      _this3.setupFirstPlay();\n\n      if (!_this3.mediaTypes_.AUDIO.activePlaylistLoader || _this3.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n        _this3.trigger('selectedinitialmedia');\n      } else {\n        // We must wait for the active audio playlist loader to\n        // finish setting up before triggering this event so the\n        // representations API and EME setup is correct\n        _this3.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', function () {\n          _this3.trigger('selectedinitialmedia');\n        });\n      }\n    });\n    this.masterPlaylistLoader_.on('loadedplaylist', function () {\n      if (_this3.loadOnPlay_) {\n        _this3.tech_.off('play', _this3.loadOnPlay_);\n      }\n\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media();\n\n      if (!updatedPlaylist) {\n        // exclude any variants that are not supported by the browser before selecting\n        // an initial media as the playlist selectors do not consider browser support\n        _this3.excludeUnsupportedVariants_();\n\n        var selectedMedia;\n\n        if (_this3.enableLowInitialPlaylist) {\n          selectedMedia = _this3.selectInitialPlaylist();\n        }\n\n        if (!selectedMedia) {\n          selectedMedia = _this3.selectPlaylist();\n        }\n\n        if (!selectedMedia || !_this3.shouldSwitchToMedia_(selectedMedia)) {\n          return;\n        }\n\n        _this3.initialMedia_ = selectedMedia;\n\n        _this3.switchMedia_(_this3.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will\n        // fire again since the playlist will be requested. In the case of vhs-json\n        // (where the manifest object is provided as the source), when the media\n        // playlist's `segments` list is already available, a media playlist won't be\n        // requested, and loadedplaylist won't fire again, so the playlist handler must be\n        // called on its own here.\n\n\n        var haveJsonSource = _this3.sourceType_ === 'vhs-json' && _this3.initialMedia_.segments;\n\n        if (!haveJsonSource) {\n          return;\n        }\n\n        updatedPlaylist = _this3.initialMedia_;\n      }\n\n      _this3.handleUpdatedMediaPlaylist(updatedPlaylist);\n    });\n    this.masterPlaylistLoader_.on('error', function () {\n      _this3.blacklistCurrentPlaylist(_this3.masterPlaylistLoader_.error);\n    });\n    this.masterPlaylistLoader_.on('mediachanging', function () {\n      _this3.mainSegmentLoader_.abort();\n\n      _this3.mainSegmentLoader_.pause();\n    });\n    this.masterPlaylistLoader_.on('mediachange', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      }\n\n      _this3.masterPlaylistLoader_.load(); // TODO: Create a new event on the PlaylistLoader that signals\n      // that the segments have changed in some way and use that to\n      // update the SegmentLoader instead of doing it twice here and\n      // on `loadedplaylist`\n\n\n      _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n      _this3.mainSegmentLoader_.load();\n\n      _this3.tech_.trigger({\n        type: 'mediachange',\n        bubbles: true\n      });\n    });\n    this.masterPlaylistLoader_.on('playlistunchanged', function () {\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media(); // ignore unchanged playlists that have already been\n      // excluded for not-changing. We likely just have a really slowly updating\n      // playlist.\n\n\n      if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {\n        return;\n      }\n\n      var playlistOutdated = _this3.stuckAtPlaylistEnd_(updatedPlaylist);\n\n      if (playlistOutdated) {\n        // Playlist has stopped updating and we're stuck at its end. Try to\n        // blacklist it and switch to another playlist in the hope that that\n        // one is updating (and give the player a chance to re-adjust to the\n        // safe live point).\n        _this3.blacklistCurrentPlaylist({\n          message: 'Playlist no longer updating.',\n          reason: 'playlist-unchanged'\n        }); // useful for monitoring QoS\n\n\n        _this3.tech_.trigger('playliststuck');\n      }\n    });\n    this.masterPlaylistLoader_.on('renditiondisabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-disabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-disabled'\n      });\n    });\n    this.masterPlaylistLoader_.on('renditionenabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-enabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-enabled'\n      });\n    });\n  }\n  /**\n   * Given an updated media playlist (whether it was loaded for the first time, or\n   * refreshed for live playlists), update any relevant properties and state to reflect\n   * changes in the media that should be accounted for (e.g., cues and duration).\n   *\n   * @param {Object} updatedPlaylist the updated media playlist object\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleUpdatedMediaPlaylist = function handleUpdatedMediaPlaylist(updatedPlaylist) {\n    if (this.useCueTags_) {\n      this.updateAdCues_(updatedPlaylist);\n    } // TODO: Create a new event on the PlaylistLoader that signals\n    // that the segments have changed in some way and use that to\n    // update the SegmentLoader instead of doing it twice here and\n    // on `mediachange`\n\n\n    this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);\n    this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,\n    // as it is possible that it was temporarily stopped while waiting for\n    // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n    if (!this.tech_.paused()) {\n      this.mainSegmentLoader_.load();\n\n      if (this.audioSegmentLoader_) {\n        this.audioSegmentLoader_.load();\n      }\n    }\n  }\n  /**\n   * A helper function for triggerring presence usage events once per source\n   *\n   * @private\n   */\n  ;\n\n  _proto.triggerPresenceUsage_ = function triggerPresenceUsage_(master, media) {\n    var mediaGroups = master.mediaGroups || {};\n    var defaultDemuxed = true;\n    var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n    for (var mediaGroup in mediaGroups.AUDIO) {\n      for (var label in mediaGroups.AUDIO[mediaGroup]) {\n        var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n        if (!properties.uri) {\n          defaultDemuxed = false;\n        }\n      }\n    }\n\n    if (defaultDemuxed) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-demuxed'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-demuxed'\n      });\n    }\n\n    if (Object.keys(mediaGroups.SUBTITLES).length) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-webvtt'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-webvtt'\n      });\n    }\n\n    if (Vhs$1.Playlist.isAes(media)) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-aes'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-aes'\n      });\n    }\n\n    if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-alternate-audio'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-alternate-audio'\n      });\n    }\n\n    if (this.useCueTags_) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-playlist-cue-tags'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-playlist-cue-tags'\n      });\n    }\n  };\n\n  _proto.shouldSwitchToMedia_ = function shouldSwitchToMedia_(nextPlaylist) {\n    var currentPlaylist = this.masterPlaylistLoader_.media() || this.masterPlaylistLoader_.pendingMedia_;\n    var currentTime = this.tech_.currentTime();\n    var bufferLowWaterLine = this.bufferLowWaterLine();\n    var bufferHighWaterLine = this.bufferHighWaterLine();\n    var buffered = this.tech_.buffered();\n    return shouldSwitchToMedia({\n      buffered: buffered,\n      currentTime: currentTime,\n      currentPlaylist: currentPlaylist,\n      nextPlaylist: nextPlaylist,\n      bufferLowWaterLine: bufferLowWaterLine,\n      bufferHighWaterLine: bufferHighWaterLine,\n      duration: this.duration(),\n      experimentalBufferBasedABR: this.experimentalBufferBasedABR,\n      log: this.logger_\n    });\n  }\n  /**\n   * Register event handlers on the segment loaders. A helper function\n   * for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupSegmentLoaderListeners_ = function setupSegmentLoaderListeners_() {\n    var _this4 = this;\n\n    this.mainSegmentLoader_.on('bandwidthupdate', function () {\n      // Whether or not buffer based ABR or another ABR is used, on a bandwidth change it's\n      // useful to check to see if a rendition switch should be made.\n      _this4.checkABR_('bandwidthupdate');\n\n      _this4.tech_.trigger('bandwidthupdate');\n    });\n    this.mainSegmentLoader_.on('timeout', function () {\n      if (_this4.experimentalBufferBasedABR) {\n        // If a rendition change is needed, then it would've be done on `bandwidthupdate`.\n        // Here the only consideration is that for buffer based ABR there's no guarantee\n        // of an immediate switch (since the bandwidth is averaged with a timeout\n        // bandwidth value of 1), so force a load on the segment loader to keep it going.\n        _this4.mainSegmentLoader_.load();\n      }\n    }); // `progress` events are not reliable enough of a bandwidth measure to trigger buffer\n    // based ABR.\n\n    if (!this.experimentalBufferBasedABR) {\n      this.mainSegmentLoader_.on('progress', function () {\n        _this4.trigger('progress');\n      });\n    }\n\n    this.mainSegmentLoader_.on('error', function () {\n      _this4.blacklistCurrentPlaylist(_this4.mainSegmentLoader_.error());\n    });\n    this.mainSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.mainSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.mainSegmentLoader_.on('timestampoffset', function () {\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-timestamp-offset'\n      });\n\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'hls-timestamp-offset'\n      });\n    });\n    this.audioSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.audioSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.audioSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('ended', function () {\n      _this4.logger_('main segment loader ended');\n\n      _this4.onEndOfStream();\n    });\n    this.mainSegmentLoader_.on('earlyabort', function (event) {\n      // never try to early abort with the new ABR algorithm\n      if (_this4.experimentalBufferBasedABR) {\n        return;\n      }\n\n      _this4.delegateLoaders_('all', ['abort']);\n\n      _this4.blacklistCurrentPlaylist({\n        message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n      }, ABORT_EARLY_BLACKLIST_SECONDS);\n    });\n\n    var updateCodecs = function updateCodecs() {\n      if (!_this4.sourceUpdater_.hasCreatedSourceBuffers()) {\n        return _this4.tryToCreateSourceBuffers_();\n      }\n\n      var codecs = _this4.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n\n      if (!codecs) {\n        return;\n      }\n\n      _this4.sourceUpdater_.addOrChangeSourceBuffers(codecs);\n    };\n\n    this.mainSegmentLoader_.on('trackinfo', updateCodecs);\n    this.audioSegmentLoader_.on('trackinfo', updateCodecs);\n    this.mainSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('ended', function () {\n      _this4.logger_('audioSegmentLoader ended');\n\n      _this4.onEndOfStream();\n    });\n  };\n\n  _proto.mediaSecondsLoaded_ = function mediaSecondsLoaded_() {\n    return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n  }\n  /**\n   * Call load on our SegmentLoaders\n   */\n  ;\n\n  _proto.load = function load() {\n    this.mainSegmentLoader_.load();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.load();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.load();\n    }\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions without performing destructive actions, like\n   * removing already buffered content\n   *\n   * @private\n   * @deprecated\n   */\n  ;\n\n  _proto.smoothQualityChange_ = function smoothQualityChange_(media) {\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    this.fastQualityChange_(media);\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions. This method will perform destructive actions like removing\n   * already buffered content in order to readjust the currently active\n   * playlist quickly. This is good for manual quality changes\n   *\n   * @private\n   */\n  ;\n\n  _proto.fastQualityChange_ = function fastQualityChange_(media) {\n    var _this5 = this;\n\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    if (media === this.masterPlaylistLoader_.media()) {\n      this.logger_('skipping fastQualityChange because new media is same as old');\n      return;\n    }\n\n    this.switchMedia_(media, 'fast-quality'); // Delete all buffered data to allow an immediate quality switch, then seek to give\n    // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n    // ahead is roughly the minimum that will accomplish this across a variety of content\n    // in IE and Edge, but seeking in place is sufficient on all other browsers)\n    // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n    // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n    this.mainSegmentLoader_.resetEverything(function () {\n      // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n      // from the previously enabled rendition to load before the new playlist has finished loading\n      if (videojs.browser.IE_VERSION || videojs.browser.IS_EDGE) {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime() + 0.04);\n      } else {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime());\n      }\n    }); // don't need to reset audio as it is reset when media changes\n  }\n  /**\n   * Begin playback.\n   */\n  ;\n\n  _proto.play = function play() {\n    if (this.setupFirstPlay()) {\n      return;\n    }\n\n    if (this.tech_.ended()) {\n      this.tech_.setCurrentTime(0);\n    }\n\n    if (this.hasPlayed_) {\n      this.load();\n    }\n\n    var seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n    // seek forward to the live point\n\n    if (this.tech_.duration() === Infinity) {\n      if (this.tech_.currentTime() < seekable.start(0)) {\n        return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n      }\n    }\n  }\n  /**\n   * Seek to the latest media position if this is a live video and the\n   * player and video are loaded and initialized.\n   */\n  ;\n\n  _proto.setupFirstPlay = function setupFirstPlay() {\n    var _this6 = this;\n\n    var media = this.masterPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n    //  If 1) there is no active media\n    //     2) the player is paused\n    //     3) the first play has already been setup\n    // then exit early\n\n    if (!media || this.tech_.paused() || this.hasPlayed_) {\n      return false;\n    } // when the video is a live stream\n\n\n    if (!media.endList) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        // without a seekable range, the player cannot seek to begin buffering at the live\n        // point\n        return false;\n      }\n\n      if (videojs.browser.IE_VERSION && this.tech_.readyState() === 0) {\n        // IE11 throws an InvalidStateError if you try to set currentTime while the\n        // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n        this.tech_.one('loadedmetadata', function () {\n          _this6.trigger('firstplay');\n\n          _this6.tech_.setCurrentTime(seekable.end(0));\n\n          _this6.hasPlayed_ = true;\n        });\n        return false;\n      } // trigger firstplay to inform the source handler to ignore the next seek event\n\n\n      this.trigger('firstplay'); // seek to the live point\n\n      this.tech_.setCurrentTime(seekable.end(0));\n    }\n\n    this.hasPlayed_ = true; // we can begin loading now that everything is ready\n\n    this.load();\n    return true;\n  }\n  /**\n   * handle the sourceopen event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceOpen_ = function handleSourceOpen_() {\n    // Only attempt to create the source buffer if none already exist.\n    // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n    // after `endOfStream` has been called (in response to a seek for instance)\n    this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of\n    // code in video.js but is required because play() must be invoked\n    // *after* the media source has opened.\n\n    if (this.tech_.autoplay()) {\n      var playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n      // on browsers which return a promise\n\n      if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n        playPromise.then(null, function (e) {});\n      }\n    }\n\n    this.trigger('sourceopen');\n  }\n  /**\n   * handle the sourceended event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceEnded_ = function handleSourceEnded_() {\n    if (!this.inbandTextTracks_.metadataTrack_) {\n      return;\n    }\n\n    var cues = this.inbandTextTracks_.metadataTrack_.cues;\n\n    if (!cues || !cues.length) {\n      return;\n    }\n\n    var duration = this.duration();\n    cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;\n  }\n  /**\n   * handle the durationchange event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleDurationChange_ = function handleDurationChange_() {\n    this.tech_.trigger('durationchange');\n  }\n  /**\n   * Calls endOfStream on the media source when all active stream types have called\n   * endOfStream\n   *\n   * @param {string} streamType\n   *        Stream type of the segment loader that called endOfStream\n   * @private\n   */\n  ;\n\n  _proto.onEndOfStream = function onEndOfStream() {\n    var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      var mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active\n\n      if (!mainMediaInfo || mainMediaInfo.hasVideo) {\n        // if we do not know if the main segment loader contains video yet or if we\n        // definitively know the main segment loader contains video, then we need to wait\n        // for both main and audio segment loaders to call endOfStream\n        isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n      } else {\n        // otherwise just rely on the audio loader\n        isEndOfStream = this.audioSegmentLoader_.ended_;\n      }\n    }\n\n    if (!isEndOfStream) {\n      return;\n    }\n\n    this.stopABRTimer_();\n    this.sourceUpdater_.endOfStream();\n  }\n  /**\n   * Check if a playlist has stopped being updated\n   *\n   * @param {Object} playlist the media playlist object\n   * @return {boolean} whether the playlist has stopped being updated or not\n   */\n  ;\n\n  _proto.stuckAtPlaylistEnd_ = function stuckAtPlaylistEnd_(playlist) {\n    var seekable = this.seekable();\n\n    if (!seekable.length) {\n      // playlist doesn't have enough information to determine whether we are stuck\n      return false;\n    }\n\n    var expired = this.syncController_.getExpiredTime(playlist, this.duration());\n\n    if (expired === null) {\n      return false;\n    } // does not use the safe live end to calculate playlist end, since we\n    // don't want to say we are stuck while there is still content\n\n\n    var absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (!buffered.length) {\n      // return true if the playhead reached the absolute end of the playlist\n      return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n    }\n\n    var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n    // end of playlist\n\n    return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n  }\n  /**\n   * Blacklists a playlist when an error occurs for a set amount of time\n   * making it unavailable for selection by the rendition selection algorithm\n   * and then forces a new playlist (rendition) selection.\n   *\n   * @param {Object=} error an optional error that may include the playlist\n   * to blacklist\n   * @param {number=} blacklistDuration an optional number of seconds to blacklist the\n   * playlist\n   */\n  ;\n\n  _proto.blacklistCurrentPlaylist = function blacklistCurrentPlaylist(error, blacklistDuration) {\n    if (error === void 0) {\n      error = {};\n    } // If the `error` was generated by the playlist loader, it will contain\n    // the playlist we were trying to load (but failed) and that should be\n    // blacklisted instead of the currently selected playlist which is likely\n    // out-of-date in this scenario\n\n\n    var currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n    blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration; // If there is no current playlist, then an error occurred while we were\n    // trying to load the master OR while we were disposing of the tech\n\n    if (!currentPlaylist) {\n      this.error = error;\n\n      if (this.mediaSource.readyState !== 'open') {\n        this.trigger('error');\n      } else {\n        this.sourceUpdater_.endOfStream('network');\n      }\n\n      return;\n    }\n\n    currentPlaylist.playlistErrors_++;\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var enabledPlaylists = playlists.filter(isEnabled);\n    var isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === currentPlaylist; // Don't blacklist the only playlist unless it was blacklisted\n    // forever\n\n    if (playlists.length === 1 && blacklistDuration !== Infinity) {\n      videojs.log.warn(\"Problem encountered with playlist \" + currentPlaylist.id + \". \" + 'Trying again since it is the only playlist.');\n      this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay\n\n      return this.masterPlaylistLoader_.load(isFinalRendition);\n    }\n\n    if (isFinalRendition) {\n      // Since we're on the final non-blacklisted playlist, and we're about to blacklist\n      // it, instead of erring the player or retrying this playlist, clear out the current\n      // blacklist. This allows other playlists to be attempted in case any have been\n      // fixed.\n      var reincluded = false;\n      playlists.forEach(function (playlist) {\n        // skip current playlist which is about to be blacklisted\n        if (playlist === currentPlaylist) {\n          return;\n        }\n\n        var excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.\n\n        if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {\n          reincluded = true;\n          delete playlist.excludeUntil;\n        }\n      });\n\n      if (reincluded) {\n        videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous\n        // playlist. This is needed for users relying on the retryplaylist event to catch a\n        // case where the player might be stuck and looping through \"dead\" playlists.\n\n        this.tech_.trigger('retryplaylist');\n      }\n    } // Blacklist this playlist\n\n\n    var excludeUntil;\n\n    if (currentPlaylist.playlistErrors_ > this.maxPlaylistRetries) {\n      excludeUntil = Infinity;\n    } else {\n      excludeUntil = Date.now() + blacklistDuration * 1000;\n    }\n\n    currentPlaylist.excludeUntil = excludeUntil;\n\n    if (error.reason) {\n      currentPlaylist.lastExcludeReason_ = error.reason;\n    }\n\n    this.tech_.trigger('blacklistplaylist');\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-rendition-blacklisted'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-rendition-blacklisted'\n    }); // TODO: should we select a new playlist if this blacklist wasn't for the currentPlaylist?\n    // Would be something like media().id !=== currentPlaylist.id and we  would need something\n    // like `pendingMedia` in playlist loaders to check against that too. This will prevent us\n    // from loading a new playlist on any blacklist.\n    // Select a new playlist\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (!nextPlaylist) {\n      this.error = 'Playback cannot continue. No available working or supported playlists.';\n      this.trigger('error');\n      return;\n    }\n\n    var logFn = error.internal ? this.logger_ : videojs.log.warn;\n    var errorMessage = error.message ? ' ' + error.message : '';\n    logFn((error.internal ? 'Internal problem' : 'Problem') + \" encountered with playlist \" + currentPlaylist.id + \".\" + (errorMessage + \" Switching to playlist \" + nextPlaylist.id + \".\")); // if audio group changed reset audio loaders\n\n    if (nextPlaylist.attributes.AUDIO !== currentPlaylist.attributes.AUDIO) {\n      this.delegateLoaders_('audio', ['abort', 'pause']);\n    } // if subtitle group changed reset subtitle loaders\n\n\n    if (nextPlaylist.attributes.SUBTITLES !== currentPlaylist.attributes.SUBTITLES) {\n      this.delegateLoaders_('subtitle', ['abort', 'pause']);\n    }\n\n    this.delegateLoaders_('main', ['abort', 'pause']);\n    var delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;\n    var shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration\n\n    return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);\n  }\n  /**\n   * Pause all segment/playlist loaders\n   */\n  ;\n\n  _proto.pauseLoading = function pauseLoading() {\n    this.delegateLoaders_('all', ['abort', 'pause']);\n    this.stopABRTimer_();\n  }\n  /**\n   * Call a set of functions in order on playlist loaders, segment loaders,\n   * or both types of loaders.\n   *\n   * @param {string} filter\n   *        Filter loaders that should call fnNames using a string. Can be:\n   *        * all - run on all loaders\n   *        * audio - run on all audio loaders\n   *        * subtitle - run on all subtitle loaders\n   *        * main - run on the main/master loaders\n   *\n   * @param {Array|string} fnNames\n   *        A string or array of function names to call.\n   */\n  ;\n\n  _proto.delegateLoaders_ = function delegateLoaders_(filter, fnNames) {\n    var _this7 = this;\n\n    var loaders = [];\n    var dontFilterPlaylist = filter === 'all';\n\n    if (dontFilterPlaylist || filter === 'main') {\n      loaders.push(this.masterPlaylistLoader_);\n    }\n\n    var mediaTypes = [];\n\n    if (dontFilterPlaylist || filter === 'audio') {\n      mediaTypes.push('AUDIO');\n    }\n\n    if (dontFilterPlaylist || filter === 'subtitle') {\n      mediaTypes.push('CLOSED-CAPTIONS');\n      mediaTypes.push('SUBTITLES');\n    }\n\n    mediaTypes.forEach(function (mediaType) {\n      var loader = _this7.mediaTypes_[mediaType] && _this7.mediaTypes_[mediaType].activePlaylistLoader;\n\n      if (loader) {\n        loaders.push(loader);\n      }\n    });\n    ['main', 'audio', 'subtitle'].forEach(function (name) {\n      var loader = _this7[name + \"SegmentLoader_\"];\n\n      if (loader && (filter === name || filter === 'all')) {\n        loaders.push(loader);\n      }\n    });\n    loaders.forEach(function (loader) {\n      return fnNames.forEach(function (fnName) {\n        if (typeof loader[fnName] === 'function') {\n          loader[fnName]();\n        }\n      });\n    });\n  }\n  /**\n   * set the current time on all segment loaders\n   *\n   * @param {TimeRange} currentTime the current time to set\n   * @return {TimeRange} the current time\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    var buffered = findRange(this.tech_.buffered(), currentTime);\n\n    if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n      // return immediately if the metadata is not ready yet\n      return 0;\n    } // it's clearly an edge-case but don't thrown an error if asked to\n    // seek within an empty playlist\n\n\n    if (!this.masterPlaylistLoader_.media().segments) {\n      return 0;\n    } // if the seek location is already buffered, continue buffering as usual\n\n\n    if (buffered && buffered.length) {\n      return currentTime;\n    } // cancel outstanding requests so we begin buffering at the new\n    // location\n\n\n    this.mainSegmentLoader_.resetEverything();\n    this.mainSegmentLoader_.abort();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.resetEverything();\n      this.audioSegmentLoader_.abort();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.resetEverything();\n      this.subtitleSegmentLoader_.abort();\n    } // start segment loader loading in case they are paused\n\n\n    this.load();\n  }\n  /**\n   * get the current duration\n   *\n   * @return {TimeRange} the duration\n   */\n  ;\n\n  _proto.duration = function duration() {\n    if (!this.masterPlaylistLoader_) {\n      return 0;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      // no playlists loaded yet, so can't determine a duration\n      return 0;\n    } // Don't rely on the media source for duration in the case of a live playlist since\n    // setting the native MediaSource's duration to infinity ends up with consequences to\n    // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n    //\n    // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n    // however, few browsers have support for setLiveSeekableRange()\n    // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n    //\n    // Until a time when the duration of the media source can be set to infinity, and a\n    // seekable range specified across browsers, just return Infinity.\n\n\n    if (!media.endList) {\n      return Infinity;\n    } // Since this is a VOD video, it is safe to rely on the media source's duration (if\n    // available). If it's not available, fall back to a playlist-calculated estimate.\n\n\n    if (this.mediaSource) {\n      return this.mediaSource.duration;\n    }\n\n    return Vhs$1.Playlist.duration(media);\n  }\n  /**\n   * check the seekable range\n   *\n   * @return {TimeRange} the seekable range\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.seekable_;\n  };\n\n  _proto.onSyncInfoUpdate_ = function onSyncInfoUpdate_() {\n    var audioSeekable; // TODO check for creation of both source buffers before updating seekable\n    //\n    // A fix was made to this function where a check for\n    // this.sourceUpdater_.hasCreatedSourceBuffers\n    // was added to ensure that both source buffers were created before seekable was\n    // updated. However, it originally had a bug where it was checking for a true and\n    // returning early instead of checking for false. Setting it to check for false to\n    // return early though created other issues. A call to play() would check for seekable\n    // end without verifying that a seekable range was present. In addition, even checking\n    // for that didn't solve some issues, as handleFirstPlay is sometimes worked around\n    // due to a media update calling load on the segment loaders, skipping a seek to live,\n    // thereby starting live streams at the beginning of the stream rather than at the end.\n    //\n    // This conditional should be fixed to wait for the creation of two source buffers at\n    // the same time as the other sections of code are fixed to properly seek to live and\n    // not throw an error due to checking for a seekable end when no seekable range exists.\n    //\n    // For now, fall back to the older behavior, with the understanding that the seekable\n    // range may not be completely correct, leading to a suboptimal initial live point.\n\n    if (!this.masterPlaylistLoader_) {\n      return;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      return;\n    }\n\n    var expired = this.syncController_.getExpiredTime(media, this.duration());\n\n    if (expired === null) {\n      // not enough information to update seekable\n      return;\n    }\n\n    var master = this.masterPlaylistLoader_.master;\n    var mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n    if (mainSeekable.length === 0) {\n      return;\n    }\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n      expired = this.syncController_.getExpiredTime(media, this.duration());\n\n      if (expired === null) {\n        return;\n      }\n\n      audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n      if (audioSeekable.length === 0) {\n        return;\n      }\n    }\n\n    var oldEnd;\n    var oldStart;\n\n    if (this.seekable_ && this.seekable_.length) {\n      oldEnd = this.seekable_.end(0);\n      oldStart = this.seekable_.start(0);\n    }\n\n    if (!audioSeekable) {\n      // seekable has been calculated based on buffering video data so it\n      // can be returned directly\n      this.seekable_ = mainSeekable;\n    } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n      // seekables are pretty far off, rely on main\n      this.seekable_ = mainSeekable;\n    } else {\n      this.seekable_ = videojs.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n    } // seekable is the same as last time\n\n\n    if (this.seekable_ && this.seekable_.length) {\n      if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n        return;\n      }\n    }\n\n    this.logger_(\"seekable updated [\" + printableRange(this.seekable_) + \"]\");\n    this.tech_.trigger('seekablechanged');\n  }\n  /**\n   * Update the player duration\n   */\n  ;\n\n  _proto.updateDuration = function updateDuration(isLive) {\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n      this.updateDuration_ = null;\n    }\n\n    if (this.mediaSource.readyState !== 'open') {\n      this.updateDuration_ = this.updateDuration.bind(this, isLive);\n      this.mediaSource.addEventListener('sourceopen', this.updateDuration_);\n      return;\n    }\n\n    if (isLive) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        return;\n      } // Even in the case of a live playlist, the native MediaSource's duration should not\n      // be set to Infinity (even though this would be expected for a live playlist), since\n      // setting the native MediaSource's duration to infinity ends up with consequences to\n      // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n      //\n      // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n      // however, few browsers have support for setLiveSeekableRange()\n      // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n      //\n      // Until a time when the duration of the media source can be set to infinity, and a\n      // seekable range specified across browsers, the duration should be greater than or\n      // equal to the last possible seekable value.\n      // MediaSource duration starts as NaN\n      // It is possible (and probable) that this case will never be reached for many\n      // sources, since the MediaSource reports duration as the highest value without\n      // accounting for timestamp offset. For example, if the timestamp offset is -100 and\n      // we buffered times 0 to 100 with real times of 100 to 200, even though current\n      // time will be between 0 and 100, the native media source may report the duration\n      // as 200. However, since we report duration separate from the media source (as\n      // Infinity), and as long as the native media source duration value is greater than\n      // our reported seekable range, seeks will work as expected. The large number as\n      // duration for live is actually a strategy used by some players to work around the\n      // issue of live seekable ranges cited above.\n\n\n      if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {\n        this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));\n      }\n\n      return;\n    }\n\n    var buffered = this.tech_.buffered();\n    var duration = Vhs$1.Playlist.duration(this.masterPlaylistLoader_.media());\n\n    if (buffered.length > 0) {\n      duration = Math.max(duration, buffered.end(buffered.length - 1));\n    }\n\n    if (this.mediaSource.duration !== duration) {\n      this.sourceUpdater_.setDuration(duration);\n    }\n  }\n  /**\n   * dispose of the MasterPlaylistController and everything\n   * that it controls\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this8 = this;\n\n    this.trigger('dispose');\n    this.decrypter_.terminate();\n    this.masterPlaylistLoader_.dispose();\n    this.mainSegmentLoader_.dispose();\n\n    if (this.loadOnPlay_) {\n      this.tech_.off('play', this.loadOnPlay_);\n    }\n\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      var groups = _this8.mediaTypes_[type].groups;\n\n      for (var id in groups) {\n        groups[id].forEach(function (group) {\n          if (group.playlistLoader) {\n            group.playlistLoader.dispose();\n          }\n        });\n      }\n    });\n    this.audioSegmentLoader_.dispose();\n    this.subtitleSegmentLoader_.dispose();\n    this.sourceUpdater_.dispose();\n    this.timelineChangeController_.dispose();\n    this.stopABRTimer_();\n\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n    }\n\n    this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n    this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);\n    this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);\n    this.off();\n  }\n  /**\n   * return the master playlist object if we have one\n   *\n   * @return {Object} the master playlist object that we parsed\n   */\n  ;\n\n  _proto.master = function master() {\n    return this.masterPlaylistLoader_.master;\n  }\n  /**\n   * return the currently selected playlist\n   *\n   * @return {Object} the currently selected playlist object that we parsed\n   */\n  ;\n\n  _proto.media = function media() {\n    // playlist loader will not return media if it has not been fully loaded\n    return this.masterPlaylistLoader_.media() || this.initialMedia_;\n  };\n\n  _proto.areMediaTypesKnown_ = function areMediaTypesKnown_() {\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n    var hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info\n    // otherwise check on the segment loader.\n\n    var hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs\n\n    if (!hasMainMediaInfo || !hasAudioMediaInfo) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCodecsOrExclude_ = function getCodecsOrExclude_() {\n    var _this9 = this;\n\n    var media = {\n      main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},\n      audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}\n    };\n    var playlist = this.mainSegmentLoader_.getPendingSegmentPlaylist() || this.media(); // set \"main\" media equal to video\n\n    media.video = media.main;\n    var playlistCodecs = codecsForPlaylist(this.master(), playlist);\n    var codecs = {};\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n\n    if (media.main.hasVideo) {\n      codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;\n    }\n\n    if (media.main.isMuxed) {\n      codecs.video += \",\" + (playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC);\n    }\n\n    if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {\n      codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct \"supports\" function below\n\n      media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;\n    } // no codecs, no playback.\n\n\n    if (!codecs.audio && !codecs.video) {\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        message: 'Could not determine codecs for playlist.',\n        blacklistDuration: Infinity\n      });\n      return;\n    } // fmp4 relies on browser support, while ts relies on muxer support\n\n\n    var supportFunction = function supportFunction(isFmp4, codec) {\n      return isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);\n    };\n\n    var unsupportedCodecs = {};\n    var unsupportedAudio;\n    ['video', 'audio'].forEach(function (type) {\n      if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {\n        var supporter = media[type].isFmp4 ? 'browser' : 'muxer';\n        unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];\n        unsupportedCodecs[supporter].push(codecs[type]);\n\n        if (type === 'audio') {\n          unsupportedAudio = supporter;\n        }\n      }\n    });\n\n    if (usingAudioLoader && unsupportedAudio && playlist.attributes.AUDIO) {\n      var audioGroup = playlist.attributes.AUDIO;\n      this.master().playlists.forEach(function (variant) {\n        var variantAudioGroup = variant.attributes && variant.attributes.AUDIO;\n\n        if (variantAudioGroup === audioGroup && variant !== playlist) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n      this.logger_(\"excluding audio group \" + audioGroup + \" as \" + unsupportedAudio + \" does not support codec(s): \\\"\" + codecs.audio + \"\\\"\");\n    } // if we have any unsupported codecs blacklist this playlist.\n\n\n    if (Object.keys(unsupportedCodecs).length) {\n      var message = Object.keys(unsupportedCodecs).reduce(function (acc, supporter) {\n        if (acc) {\n          acc += ', ';\n        }\n\n        acc += supporter + \" does not support codec(s): \\\"\" + unsupportedCodecs[supporter].join(',') + \"\\\"\";\n        return acc;\n      }, '') + '.';\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        internal: true,\n        message: message,\n        blacklistDuration: Infinity\n      });\n      return;\n    } // check if codec switching is happening\n\n\n    if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {\n      var switchMessages = [];\n      ['video', 'audio'].forEach(function (type) {\n        var newCodec = (parseCodecs(_this9.sourceUpdater_.codecs[type] || '')[0] || {}).type;\n        var oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;\n\n        if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {\n          switchMessages.push(\"\\\"\" + _this9.sourceUpdater_.codecs[type] + \"\\\" -> \\\"\" + codecs[type] + \"\\\"\");\n        }\n      });\n\n      if (switchMessages.length) {\n        this.blacklistCurrentPlaylist({\n          playlist: playlist,\n          message: \"Codec switching not supported: \" + switchMessages.join(', ') + \".\",\n          blacklistDuration: Infinity,\n          internal: true\n        });\n        return;\n      }\n    } // TODO: when using the muxer shouldn't we just return\n    // the codecs that the muxer outputs?\n\n\n    return codecs;\n  }\n  /**\n   * Create source buffers and exlude any incompatible renditions.\n   *\n   * @private\n   */\n  ;\n\n  _proto.tryToCreateSourceBuffers_ = function tryToCreateSourceBuffers_() {\n    // media source is not ready yet or sourceBuffers are already\n    // created.\n    if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {\n      return;\n    }\n\n    if (!this.areMediaTypesKnown_()) {\n      return;\n    }\n\n    var codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n    if (!codecs) {\n      return;\n    }\n\n    this.sourceUpdater_.createSourceBuffers(codecs);\n    var codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');\n    this.excludeIncompatibleVariants_(codecString);\n  }\n  /**\n   * Excludes playlists with codecs that are unsupported by the muxer and browser.\n   */\n  ;\n\n  _proto.excludeUnsupportedVariants_ = function excludeUnsupportedVariants_() {\n    var _this10 = this;\n\n    var playlists = this.master().playlists;\n    var ids = []; // TODO: why don't we have a property to loop through all\n    // playlist? Why did we ever mix indexes and keys?\n\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n\n      if (ids.indexOf(variant.id) !== -1) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var codecs = codecsForPlaylist(_this10.master, variant);\n      var unsupported = [];\n\n      if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {\n        unsupported.push(\"audio codec \" + codecs.audio);\n      }\n\n      if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {\n        unsupported.push(\"video codec \" + codecs.video);\n      }\n\n      if (codecs.text && codecs.text === 'stpp.ttml.im1t') {\n        unsupported.push(\"text codec \" + codecs.text);\n      }\n\n      if (unsupported.length) {\n        variant.excludeUntil = Infinity;\n\n        _this10.logger_(\"excluding \" + variant.id + \" for unsupported: \" + unsupported.join(', '));\n      }\n    });\n  }\n  /**\n   * Blacklist playlists that are known to be codec or\n   * stream-incompatible with the SourceBuffer configuration. For\n   * instance, Media Source Extensions would cause the video element to\n   * stall waiting for video data if you switched from a variant with\n   * video and audio to an audio-only one.\n   *\n   * @param {Object} media a media playlist compatible with the current\n   * set of SourceBuffers. Variants in the current master playlist that\n   * do not appear to have compatible codec or stream configurations\n   * will be excluded from the default playlist selection algorithm\n   * indefinitely.\n   * @private\n   */\n  ;\n\n  _proto.excludeIncompatibleVariants_ = function excludeIncompatibleVariants_(codecString) {\n    var _this11 = this;\n\n    var ids = [];\n    var playlists = this.master().playlists;\n    var codecs = unwrapCodecList(parseCodecs(codecString));\n    var codecCount_ = codecCount(codecs);\n    var videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;\n    var audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n      // or it if it is already excluded forever.\n\n      if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var blacklistReasons = []; // get codecs from the playlist for this variant\n\n      var variantCodecs = codecsForPlaylist(_this11.masterPlaylistLoader_.master, variant);\n      var variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this\n      // variant is incompatible. Wait for mux.js to probe\n\n      if (!variantCodecs.audio && !variantCodecs.video) {\n        return;\n      } // TODO: we can support this by removing the\n      // old media source and creating a new one, but it will take some work.\n      // The number of streams cannot change\n\n\n      if (variantCodecCount !== codecCount_) {\n        blacklistReasons.push(\"codec count \\\"\" + variantCodecCount + \"\\\" !== \\\"\" + codecCount_ + \"\\\"\");\n      } // only exclude playlists by codec change, if codecs cannot switch\n      // during playback.\n\n\n      if (!_this11.sourceUpdater_.canChangeType()) {\n        var variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;\n        var variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change\n\n        if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"video codec \\\"\" + variantVideoDetails.type + \"\\\" !== \\\"\" + videoDetails.type + \"\\\"\");\n        } // the audio codec cannot change\n\n\n        if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"audio codec \\\"\" + variantAudioDetails.type + \"\\\" !== \\\"\" + audioDetails.type + \"\\\"\");\n        }\n      }\n\n      if (blacklistReasons.length) {\n        variant.excludeUntil = Infinity;\n\n        _this11.logger_(\"blacklisting \" + variant.id + \": \" + blacklistReasons.join(' && '));\n      }\n    });\n  };\n\n  _proto.updateAdCues_ = function updateAdCues_(media) {\n    var offset = 0;\n    var seekable = this.seekable();\n\n    if (seekable.length) {\n      offset = seekable.start(0);\n    }\n\n    updateAdCues(media, this.cueTagsTrack_, offset);\n  }\n  /**\n   * Calculates the desired forward buffer length based on current time\n   *\n   * @return {number} Desired forward buffer length in seconds\n   */\n  ;\n\n  _proto.goalBufferLength = function goalBufferLength() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.GOAL_BUFFER_LENGTH;\n    var rate = Config.GOAL_BUFFER_LENGTH_RATE;\n    var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n    return Math.min(initial + currentTime * rate, max);\n  }\n  /**\n   * Calculates the desired buffer low water line based on current time\n   *\n   * @return {number} Desired buffer low water line in seconds\n   */\n  ;\n\n  _proto.bufferLowWaterLine = function bufferLowWaterLine() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.BUFFER_LOW_WATER_LINE;\n    var rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n    var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n    var newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);\n    return Math.min(initial + currentTime * rate, this.experimentalBufferBasedABR ? newMax : max);\n  };\n\n  _proto.bufferHighWaterLine = function bufferHighWaterLine() {\n    return Config.BUFFER_HIGH_WATER_LINE;\n  };\n\n  return MasterPlaylistController;\n}(videojs.EventTarget);\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {string} playlistID - id of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\n\nvar enableFunction = function enableFunction(loader, playlistID, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistID];\n    var incompatible = isIncompatible(playlist);\n    var currentlyEnabled = isEnabled(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n\n    return enable;\n  };\n};\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n\nvar Representation = function Representation(vhsHandler, playlist, id) {\n  var mpc = vhsHandler.masterPlaylistController_,\n      smoothQualityChange = vhsHandler.options_.smoothQualityChange; // Get a reference to a bound version of the quality change function\n\n  var changeType = smoothQualityChange ? 'smooth' : 'fast';\n  var qualityChangeFunction = mpc[changeType + \"QualityChange_\"].bind(mpc); // some playlist attributes are optional\n\n  if (playlist.attributes) {\n    var resolution = playlist.attributes.RESOLUTION;\n    this.width = resolution && resolution.width;\n    this.height = resolution && resolution.height;\n    this.bandwidth = playlist.attributes.BANDWIDTH;\n    this.frameRate = playlist.attributes['FRAME-RATE'];\n  }\n\n  this.codecs = codecsForPlaylist(mpc.master(), playlist);\n  this.playlist = playlist; // The id is simply the ordinality of the media playlist\n  // within the master playlist\n\n  this.id = id; // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n\n  this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);\n};\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the VhsHandler class\n *\n * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the\n * representation API into\n */\n\n\nvar renditionSelectionMixin = function renditionSelectionMixin(vhsHandler) {\n  // Add a single API-specific function to the VhsHandler instance\n  vhsHandler.representations = function () {\n    var master = vhsHandler.masterPlaylistController_.master();\n    var playlists = isAudioOnly(master) ? vhsHandler.masterPlaylistController_.getAudioTrackPlaylists_() : master.playlists;\n\n    if (!playlists) {\n      return [];\n    }\n\n    return playlists.filter(function (media) {\n      return !isIncompatible(media);\n    }).map(function (e, i) {\n      return new Representation(vhsHandler, e, e.id);\n    });\n  };\n};\n/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\n\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = /*#__PURE__*/function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   *\n   * @class\n   * @param {Object} options an object that includes the tech and settings\n   */\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    this.masterPlaylistController_ = options.masterPlaylistController;\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n    this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n    this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;\n    this.media = options.media;\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n    this.logger_ = logger('PlaybackWatcher');\n    this.logger_('initialize');\n\n    var playHandler = function playHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n\n    var mpc = this.masterPlaylistController_;\n    var loaderTypes = ['main', 'subtitle', 'audio'];\n    var loaderChecks = {};\n    loaderTypes.forEach(function (type) {\n      loaderChecks[type] = {\n        reset: function reset() {\n          return _this.resetSegmentDownloads_(type);\n        },\n        updateend: function updateend() {\n          return _this.checkSegmentDownloads_(type);\n        }\n      };\n      mpc[type + \"SegmentLoader_\"].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer\n      // isn't changing we want to reset. We cannot assume that the new rendition\n      // will also be stalled, until after new appends.\n\n      mpc[type + \"SegmentLoader_\"].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.\n      // This prevents one segment playlists (single vtt or single segment content)\n      // from being detected as stalling. As the buffer will not change in those cases, since\n      // the buffer is the entire video duration.\n\n      _this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);\n    });\n    /**\n     * We check if a seek was into a gap through the following steps:\n     * 1. We get a seeking event and we do not get a seeked event. This means that\n     *    a seek was attempted but not completed.\n     * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already\n     *    removed everything from our buffer and appended a segment, and should be ready\n     *    to check for gaps.\n     */\n\n    var setSeekingHandlers = function setSeekingHandlers(fn) {\n      ['main', 'audio'].forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"][fn]('appended', _this.seekingAppendCheck_);\n      });\n    };\n\n    this.seekingAppendCheck_ = function () {\n      if (_this.fixesBadSeeks_()) {\n        _this.consecutiveUpdates = 0;\n        _this.lastRecordedTime = _this.tech_.currentTime();\n        setSeekingHandlers('off');\n      }\n    };\n\n    this.clearSeekingAppendCheck_ = function () {\n      return setSeekingHandlers('off');\n    };\n\n    this.watchForBadSeeking_ = function () {\n      _this.clearSeekingAppendCheck_();\n\n      setSeekingHandlers('on');\n    };\n\n    this.tech_.on('seeked', this.clearSeekingAppendCheck_);\n    this.tech_.on('seeking', this.watchForBadSeeking_);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler);\n    /*\n      An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case\n      is surfaced in one of two ways:\n       1)  The `waiting` event is fired before the player has buffered content, making it impossible\n          to find or skip the gap. The `waiting` event is followed by a `play` event. On first play\n          we can check if playback is stalled due to a gap, and skip the gap if necessary.\n      2)  A source with a gap at the beginning of the stream is loaded programatically while the player\n          is in a playing state. To catch this case, it's important that our one-time play listener is setup\n          even if the player is in a playing state\n    */\n\n    this.tech_.one('play', playHandler); // Define the dispose function to clean up our events\n\n    this.dispose = function () {\n      _this.clearSeekingAppendCheck_();\n\n      _this.logger_('dispose');\n\n      _this.tech_.off('waiting', waitingHandler);\n\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n\n      _this.tech_.off('canplay', canPlayHandler);\n\n      _this.tech_.off('play', playHandler);\n\n      _this.tech_.off('seeking', _this.watchForBadSeeking_);\n\n      _this.tech_.off('seeked', _this.clearSeekingAppendCheck_);\n\n      loaderTypes.forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"].off('appendsdone', loaderChecks[type].updateend);\n        mpc[type + \"SegmentLoader_\"].off('playlistupdate', loaderChecks[type].reset);\n\n        _this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);\n      });\n\n      if (_this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n\n      _this.cancelTimer_();\n    };\n  }\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n\n  var _proto = PlaybackWatcher.prototype;\n\n  _proto.monitorCurrentTime_ = function monitorCurrentTime_() {\n    this.checkCurrentTime_();\n\n    if (this.checkCurrentTimeTimeout_) {\n      window$1.clearTimeout(this.checkCurrentTimeTimeout_);\n    } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n\n    this.checkCurrentTimeTimeout_ = window$1.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n  }\n  /**\n   * Reset stalled download stats for a specific type of loader\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#playlistupdate\n   * @listens Tech#seeking\n   * @listens Tech#seeked\n   */\n  ;\n\n  _proto.resetSegmentDownloads_ = function resetSegmentDownloads_(type) {\n    var loader = this.masterPlaylistController_[type + \"SegmentLoader_\"];\n\n    if (this[type + \"StalledDownloads_\"] > 0) {\n      this.logger_(\"resetting possible stalled download count for \" + type + \" loader\");\n    }\n\n    this[type + \"StalledDownloads_\"] = 0;\n    this[type + \"Buffered_\"] = loader.buffered_();\n  }\n  /**\n   * Checks on every segment `appendsdone` to see\n   * if segment appends are making progress. If they are not\n   * and we are still downloading bytes. We blacklist the playlist.\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#appendsdone\n   */\n  ;\n\n  _proto.checkSegmentDownloads_ = function checkSegmentDownloads_(type) {\n    var mpc = this.masterPlaylistController_;\n    var loader = mpc[type + \"SegmentLoader_\"];\n    var buffered = loader.buffered_();\n    var isBufferedDifferent = isRangeDifferent(this[type + \"Buffered_\"], buffered);\n    this[type + \"Buffered_\"] = buffered; // if another watcher is going to fix the issue or\n    // the buffered value for this loader changed\n    // appends are working\n\n    if (isBufferedDifferent) {\n      this.resetSegmentDownloads_(type);\n      return;\n    }\n\n    this[type + \"StalledDownloads_\"]++;\n    this.logger_(\"found #\" + this[type + \"StalledDownloads_\"] + \" \" + type + \" appends that did not increase buffer (possible stalled download)\", {\n      playlistId: loader.playlist_ && loader.playlist_.id,\n      buffered: timeRangesToArray(buffered)\n    }); // after 10 possibly stalled appends with no reset, exclude\n\n    if (this[type + \"StalledDownloads_\"] < 10) {\n      return;\n    }\n\n    this.logger_(type + \" loader stalled download exclusion\");\n    this.resetSegmentDownloads_(type);\n    this.tech_.trigger({\n      type: 'usage',\n      name: \"vhs-\" + type + \"-download-exclusion\"\n    });\n\n    if (type === 'subtitle') {\n      return;\n    } // TODO: should we exclude audio tracks rather than main tracks\n    // when type is audio?\n\n\n    mpc.blacklistCurrentPlaylist({\n      message: \"Excessive \" + type + \" segment downloading detected.\"\n    }, Infinity);\n  }\n  /**\n   * The purpose of this function is to emulate the \"waiting\" event on\n   * browsers that do not emit it when they are waiting for more\n   * data to continue playback\n   *\n   * @private\n   */\n  ;\n\n  _proto.checkCurrentTime_ = function checkCurrentTime_() {\n    if (this.tech_.paused() || this.tech_.seeking()) {\n      return;\n    }\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n      // If current time is at the end of the final buffered region, then any playback\n      // stall is most likely caused by buffering in a low bandwidth environment. The tech\n      // should fire a `waiting` event in this scenario, but due to browser and tech\n      // inconsistencies. Calling `techWaiting_` here allows us to simulate\n      // responding to a native `waiting` event when the tech fails to emit one.\n      return this.techWaiting_();\n    }\n\n    if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n      this.waiting_();\n    } else if (currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n    } else {\n      this.consecutiveUpdates = 0;\n      this.lastRecordedTime = currentTime;\n    }\n  }\n  /**\n   * Cancels any pending timers and resets the 'timeupdate' mechanism\n   * designed to detect that we are stalled\n   *\n   * @private\n   */\n  ;\n\n  _proto.cancelTimer_ = function cancelTimer_() {\n    this.consecutiveUpdates = 0;\n\n    if (this.timer_) {\n      this.logger_('cancelTimer_');\n      clearTimeout(this.timer_);\n    }\n\n    this.timer_ = null;\n  }\n  /**\n   * Fixes situations where there's a bad seek\n   *\n   * @return {boolean} whether an action was taken to fix the seek\n   * @private\n   */\n  ;\n\n  _proto.fixesBadSeeks_ = function fixesBadSeeks_() {\n    var seeking = this.tech_.seeking();\n\n    if (!seeking) {\n      return false;\n    } // TODO: It's possible that these seekable checks should be moved out of this function\n    // and into a function that runs on seekablechange. It's also possible that we only need\n    // afterSeekableWindow as the buffered check at the bottom is good enough to handle before\n    // seekable range.\n\n\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n    var isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n    var seekTo;\n\n    if (isAfterSeekableRange) {\n      var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n      seekTo = seekableEnd;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var seekableStart = seekable.start(0); // sync to the beginning of the live window\n      // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n      seekTo = seekableStart + ( // if the playlist is too short and the seekable range is an exact time (can\n      // happen in live with a 3 segment playlist), then don't use a time delta\n      seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);\n    }\n\n    if (typeof seekTo !== 'undefined') {\n      this.logger_(\"Trying to seek outside of seekable at time \" + currentTime + \" with \" + (\"seekable range \" + printableRange(seekable) + \". Seeking to \") + (seekTo + \".\"));\n      this.tech_.setCurrentTime(seekTo);\n      return true;\n    }\n\n    var sourceUpdater = this.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;\n    var videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;\n    var media = this.media(); // verify that at least two segment durations or one part duration have been\n    // appended before checking for a gap.\n\n    var minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been\n    // appended before checking for a gap.\n\n    var bufferedToCheck = [audioBuffered, videoBuffered];\n\n    for (var i = 0; i < bufferedToCheck.length; i++) {\n      // skip null buffered\n      if (!bufferedToCheck[i]) {\n        continue;\n      }\n\n      var timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part\n      // duration behind we haven't appended enough to call this a bad seek.\n\n      if (timeAhead < minAppendedDuration) {\n        return false;\n      }\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered\n    // to seek over the gap\n\n    if (nextRange.length === 0) {\n      return false;\n    }\n\n    seekTo = nextRange.start(0) + SAFE_TIME_DELTA;\n    this.logger_(\"Buffered region starts (\" + nextRange.start(0) + \") \" + (\" just beyond seek point (\" + currentTime + \"). Seeking to \" + seekTo + \".\"));\n    this.tech_.setCurrentTime(seekTo);\n    return true;\n  }\n  /**\n   * Handler for situations when we determine the player is waiting.\n   *\n   * @private\n   */\n  ;\n\n  _proto.waiting_ = function waiting_() {\n    if (this.techWaiting_()) {\n      return;\n    } // All tech waiting checks failed. Use last resort correction\n\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n    var currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n    // region with no indication that anything is amiss (seen in Firefox). Seeking to\n    // currentTime is usually enough to kickstart the player. This checks that the player\n    // is currently within a buffered region before attempting a corrective seek.\n    // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n    // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n    // make sure there is ~3 seconds of forward buffer before taking any corrective action\n    // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n    if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime);\n      this.logger_(\"Stopped at \" + currentTime + \" while inside a buffered region \" + (\"[\" + currentRange.start(0) + \" -> \" + currentRange.end(0) + \"]. Attempting to resume \") + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-unknown-waiting'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-unknown-waiting'\n      });\n      return;\n    }\n  }\n  /**\n   * Handler for situations when the tech fires a `waiting` event\n   *\n   * @return {boolean}\n   *         True if an action (or none) was needed to correct the waiting. False if no\n   *         checks passed\n   * @private\n   */\n  ;\n\n  _proto.techWaiting_ = function techWaiting_() {\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n\n    if (this.tech_.seeking() || this.timer_ !== null) {\n      // Tech is seeking or already waiting on another action, no action needed\n      return true;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var livePoint = seekable.end(seekable.length - 1);\n      this.logger_(\"Fell out of live window at time \" + currentTime + \". Seeking to \" + (\"live point (seekable end) \" + livePoint));\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-live-resync'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-live-resync'\n      });\n      return true;\n    }\n\n    var sourceUpdater = this.tech_.vhs.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var videoUnderflow = this.videoUnderflow_({\n      audioBuffered: sourceUpdater.audioBuffered(),\n      videoBuffered: sourceUpdater.videoBuffered(),\n      currentTime: currentTime\n    });\n\n    if (videoUnderflow) {\n      // Even though the video underflowed and was stuck in a gap, the audio overplayed\n      // the gap, leading currentTime into a buffered range. Seeking to currentTime\n      // allows the video to catch up to the audio position without losing any audio\n      // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-video-underflow'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-video-underflow'\n      });\n      return true;\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // check for gap\n\n    if (nextRange.length > 0) {\n      var difference = nextRange.start(0) - currentTime;\n      this.logger_(\"Stopped at \" + currentTime + \", setting timer for \" + difference + \", seeking \" + (\"to \" + nextRange.start(0)));\n      this.cancelTimer_();\n      this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n      return true;\n    } // All checks failed. Returning false to indicate failure to correct waiting\n\n\n    return false;\n  };\n\n  _proto.afterSeekableWindow_ = function afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow) {\n    if (allowSeeksWithinUnsafeLiveWindow === void 0) {\n      allowSeeksWithinUnsafeLiveWindow = false;\n    }\n\n    if (!seekable.length) {\n      // we can't make a solid case if there's no seekable, default to false\n      return false;\n    }\n\n    var allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n    var isLive = !playlist.endList;\n\n    if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n      allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n    }\n\n    if (currentTime > allowedEnd) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.beforeSeekableWindow_ = function beforeSeekableWindow_(seekable, currentTime) {\n    if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream\n    seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.videoUnderflow_ = function videoUnderflow_(_ref) {\n    var videoBuffered = _ref.videoBuffered,\n        audioBuffered = _ref.audioBuffered,\n        currentTime = _ref.currentTime; // audio only content will not have video underflow :)\n\n    if (!videoBuffered) {\n      return;\n    }\n\n    var gap; // find a gap in demuxed content.\n\n    if (videoBuffered.length && audioBuffered.length) {\n      // in Chrome audio will continue to play for ~3s when we run out of video\n      // so we have to check that the video buffer did have some buffer in the\n      // past.\n      var lastVideoRange = findRange(videoBuffered, currentTime - 3);\n      var videoRange = findRange(videoBuffered, currentTime);\n      var audioRange = findRange(audioBuffered, currentTime);\n\n      if (audioRange.length && !videoRange.length && lastVideoRange.length) {\n        gap = {\n          start: lastVideoRange.end(0),\n          end: audioRange.end(0)\n        };\n      } // find a gap in muxed content.\n\n    } else {\n      var nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are\n      // stuck in a gap due to video underflow.\n\n      if (!nextRange.length) {\n        gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);\n      }\n    }\n\n    if (gap) {\n      this.logger_(\"Encountered a gap in video from \" + gap.start + \" to \" + gap.end + \". \" + (\"Seeking to current time \" + currentTime));\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Timer callback. If playback still has not proceeded, then we seek\n   * to the start of the next buffered region.\n   *\n   * @private\n   */\n  ;\n\n  _proto.skipTheGap_ = function skipTheGap_(scheduledCurrentTime) {\n    var buffered = this.tech_.buffered();\n    var currentTime = this.tech_.currentTime();\n    var nextRange = findNextRange(buffered, currentTime);\n    this.cancelTimer_();\n\n    if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n      return;\n    }\n\n    this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n    this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-gap-skip'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-gap-skip'\n    });\n  };\n\n  _proto.gapFromVideoUnderflow_ = function gapFromVideoUnderflow_(buffered, currentTime) {\n    // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n    // playing for ~3 seconds after the video gap starts. This is done to account for\n    // video buffer underflow/underrun (note that this is not done when there is audio\n    // buffer underflow/underrun -- in that case the video will stop as soon as it\n    // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n    // video stalls). The player's time will reflect the playthrough of audio, so the\n    // time will appear as if we are in a buffered region, even if we are stuck in a\n    // \"gap.\"\n    //\n    // Example:\n    // video buffer:   0 => 10.1, 10.2 => 20\n    // audio buffer:   0 => 20\n    // overall buffer: 0 => 10.1, 10.2 => 20\n    // current time: 13\n    //\n    // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n    // however, the audio continued playing until it reached ~3 seconds past the gap\n    // (13 seconds), at which point it stops as well. Since current time is past the\n    // gap, findNextRange will return no ranges.\n    //\n    // To check for this issue, we see if there is a gap that starts somewhere within\n    // a 3 second range (3 seconds +/- 1 second) back from our current time.\n    var gaps = findGaps(buffered);\n\n    for (var i = 0; i < gaps.length; i++) {\n      var start = gaps.start(i);\n      var end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n      if (currentTime - start < 4 && currentTime - start > 2) {\n        return {\n          start: start,\n          end: end\n        };\n      }\n    }\n\n    return null;\n  };\n\n  return PlaybackWatcher;\n}();\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({\n      IWillNotUseThisInPlugins: true\n    });\n    var sourceObj = tech.currentSource_ || this.currentSource();\n    return next(sourceObj);\n  }\n};\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = videojs.mergeOptions(defaultOptions, options);\n  player.ready(function () {\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload-initialized'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload-initialized'\n    });\n  });\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n\n\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n    player.one('loadedmetadata', loadedMetadataHandler);\n    player.src(sourceObj);\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload'\n    });\n    player.play();\n  };\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n\n\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({\n        type: 'usage',\n        name: 'vhs-error-reload-canceled'\n      });\n      player.trigger({\n        type: 'usage',\n        name: 'hls-error-reload-canceled'\n      });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n\n    lastCalled = Date.now();\n    return localOptions.getSource.call(player, setSource);\n  };\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n\n\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n\n\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n\n  player.reloadSourceOnError = reinitPlugin;\n};\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nvar version$4 = \"2.16.2\";\nvar version$3 = \"6.0.1\";\nvar version$2 = \"0.22.1\";\nvar version$1 = \"4.8.0\";\nvar version = \"3.1.3\";\nvar Vhs = {\n  PlaylistLoader: PlaylistLoader,\n  Playlist: Playlist,\n  utils: utils,\n  STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n  lastBandwidthSelector: lastBandwidthSelector,\n  movingAverageBandwidthSelector: movingAverageBandwidthSelector,\n  comparePlaylistBandwidth: comparePlaylistBandwidth,\n  comparePlaylistResolution: comparePlaylistResolution,\n  xhr: xhrFactory()\n}; // Define getter/setters for config properties\n\nObject.keys(Config).forEach(function (prop) {\n  Object.defineProperty(Vhs, prop, {\n    get: function get() {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n      return Config[prop];\n    },\n    set: function set(value) {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n\n      if (typeof value !== 'number' || value < 0) {\n        videojs.log.warn(\"value of Vhs.\" + prop + \" must be greater than or equal to 0\");\n        return;\n      }\n\n      Config[prop] = value;\n    }\n  });\n});\nvar LOCAL_STORAGE_KEY = 'videojs-vhs';\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleVhsMediaChange\n */\n\nvar handleVhsMediaChange = function handleVhsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.id) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} vhs Vhs object to listen to for media events.\n * @function handleVhsLoadedMetadata\n */\n\n\nvar handleVhsLoadedMetadata = function handleVhsLoadedMetadata(qualityLevels, vhs) {\n  vhs.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleVhsMediaChange(qualityLevels, vhs.playlists);\n}; // HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\n\n\nVhs.canPlaySource = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar emeKeySystems = function emeKeySystems(keySystemOptions, mainPlaylist, audioPlaylist) {\n  if (!keySystemOptions) {\n    return keySystemOptions;\n  }\n\n  var codecs = {};\n\n  if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {\n    codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));\n  }\n\n  if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {\n    codecs.audio = audioPlaylist.attributes.CODECS;\n  }\n\n  var videoContentType = getMimeForCodec(codecs.video);\n  var audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist\n\n  var keySystemContentTypes = {};\n\n  for (var keySystem in keySystemOptions) {\n    keySystemContentTypes[keySystem] = {};\n\n    if (audioContentType) {\n      keySystemContentTypes[keySystem].audioContentType = audioContentType;\n    }\n\n    if (videoContentType) {\n      keySystemContentTypes[keySystem].videoContentType = videoContentType;\n    } // Default to using the video playlist's PSSH even though they may be different, as\n    // videojs-contrib-eme will only accept one in the options.\n    //\n    // This shouldn't be an issue for most cases as early intialization will handle all\n    // unique PSSH values, and if they aren't, then encrypted events should have the\n    // specific information needed for the unique license.\n\n\n    if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {\n      keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;\n    } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n    // so we need to prevent overwriting the URL entirely\n\n\n    if (typeof keySystemOptions[keySystem] === 'string') {\n      keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n    }\n  }\n\n  return videojs.mergeOptions(keySystemOptions, keySystemContentTypes);\n};\n/**\n * @typedef {Object} KeySystems\n *\n * keySystems configuration for https://github.com/videojs/videojs-contrib-eme\n * Note: not all options are listed here.\n *\n * @property {Uint8Array} [pssh]\n *           Protection System Specific Header\n */\n\n/**\n * Goes through all the playlists and collects an array of KeySystems options objects\n * containing each playlist's keySystems and their pssh values, if available.\n *\n * @param {Object[]} playlists\n *        The playlists to look through\n * @param {string[]} keySystems\n *        The keySystems to collect pssh values for\n *\n * @return {KeySystems[]}\n *         An array of KeySystems objects containing available key systems and their\n *         pssh values\n */\n\n\nvar getAllPsshKeySystemsOptions = function getAllPsshKeySystemsOptions(playlists, keySystems) {\n  return playlists.reduce(function (keySystemsArr, playlist) {\n    if (!playlist.contentProtection) {\n      return keySystemsArr;\n    }\n\n    var keySystemsOptions = keySystems.reduce(function (keySystemsObj, keySystem) {\n      var keySystemOptions = playlist.contentProtection[keySystem];\n\n      if (keySystemOptions && keySystemOptions.pssh) {\n        keySystemsObj[keySystem] = {\n          pssh: keySystemOptions.pssh\n        };\n      }\n\n      return keySystemsObj;\n    }, {});\n\n    if (Object.keys(keySystemsOptions).length) {\n      keySystemsArr.push(keySystemsOptions);\n    }\n\n    return keySystemsArr;\n  }, []);\n};\n/**\n * Returns a promise that waits for the\n * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.\n *\n * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11\n * browsers.\n *\n * As per the above ticket, this is particularly important for Chrome, where, if\n * unencrypted content is appended before encrypted content and the key session has not\n * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached\n * during playback.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n * @param {Object[]} mainPlaylists\n *        The playlists found on the master playlist object\n *\n * @return {Object}\n *         Promise that resolves when the key session has been created\n */\n\n\nvar waitForKeySessionCreation = function waitForKeySessionCreation(_ref) {\n  var player = _ref.player,\n      sourceKeySystems = _ref.sourceKeySystems,\n      audioMedia = _ref.audioMedia,\n      mainPlaylists = _ref.mainPlaylists;\n\n  if (!player.eme.initializeMediaKeys) {\n    return Promise.resolve();\n  } // TODO should all audio PSSH values be initialized for DRM?\n  //\n  // All unique video rendition pssh values are initialized for DRM, but here only\n  // the initial audio playlist license is initialized. In theory, an encrypted\n  // event should be fired if the user switches to an alternative audio playlist\n  // where a license is required, but this case hasn't yet been tested. In addition, there\n  // may be many alternate audio playlists unlikely to be used (e.g., multiple different\n  // languages).\n\n\n  var playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;\n  var keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));\n  var initializationFinishedPromises = [];\n  var keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The\n  // only place where it should not be deduped is for ms-prefixed APIs, but the early\n  // return for IE11 above, and the existence of modern EME APIs in addition to\n  // ms-prefixed APIs on Edge should prevent this from being a concern.\n  // initializeMediaKeys also won't use the webkit-prefixed APIs.\n\n  keySystemsOptionsArr.forEach(function (keySystemsOptions) {\n    keySessionCreatedPromises.push(new Promise(function (resolve, reject) {\n      player.tech_.one('keysessioncreated', resolve);\n    }));\n    initializationFinishedPromises.push(new Promise(function (resolve, reject) {\n      player.eme.initializeMediaKeys({\n        keySystems: keySystemsOptions\n      }, function (err) {\n        if (err) {\n          reject(err);\n          return;\n        }\n\n        resolve();\n      });\n    }));\n  }); // The reasons Promise.race is chosen over Promise.any:\n  //\n  // * Promise.any is only available in Safari 14+.\n  // * None of these promises are expected to reject. If they do reject, it might be\n  //   better here for the race to surface the rejection, rather than mask it by using\n  //   Promise.any.\n\n  return Promise.race([// If a session was previously created, these will all finish resolving without\n  // creating a new session, otherwise it will take until the end of all license\n  // requests, which is why the key session check is used (to make setup much faster).\n  Promise.all(initializationFinishedPromises), // Once a single session is created, the browser knows DRM will be used.\n  Promise.race(keySessionCreatedPromises)]);\n};\n/**\n * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and\n * there are keySystems on the source, sets up source options to prepare the source for\n * eme.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} media\n *        The active media playlist\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n *\n * @return {boolean}\n *         Whether or not options were configured and EME is available\n */\n\n\nvar setupEmeOptions = function setupEmeOptions(_ref2) {\n  var player = _ref2.player,\n      sourceKeySystems = _ref2.sourceKeySystems,\n      media = _ref2.media,\n      audioMedia = _ref2.audioMedia;\n  var sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);\n\n  if (!sourceOptions) {\n    return false;\n  }\n\n  player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing\n  // do nothing.\n\n  if (sourceOptions && !player.eme) {\n    videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');\n    return false;\n  }\n\n  return true;\n};\n\nvar getVhsLocalStorage = function getVhsLocalStorage() {\n  if (!window$1.localStorage) {\n    return null;\n  }\n\n  var storedObject = window$1.localStorage.getItem(LOCAL_STORAGE_KEY);\n\n  if (!storedObject) {\n    return null;\n  }\n\n  try {\n    return JSON.parse(storedObject);\n  } catch (e) {\n    // someone may have tampered with the value\n    return null;\n  }\n};\n\nvar updateVhsLocalStorage = function updateVhsLocalStorage(options) {\n  if (!window$1.localStorage) {\n    return false;\n  }\n\n  var objectToStore = getVhsLocalStorage();\n  objectToStore = objectToStore ? videojs.mergeOptions(objectToStore, options) : options;\n\n  try {\n    window$1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));\n  } catch (e) {\n    // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n    // storage is set to 0).\n    // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n    // No need to perform any operation.\n    return false;\n  }\n\n  return objectToStore;\n};\n/**\n * Parses VHS-supported media types from data URIs. See\n * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs\n * for information on data URIs.\n *\n * @param {string} dataUri\n *        The data URI\n *\n * @return {string|Object}\n *         The parsed object/string, or the original string if no supported media type\n *         was found\n */\n\n\nvar expandDataUri = function expandDataUri(dataUri) {\n  if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {\n    return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));\n  } // no known case for this data URI, return the string as-is\n\n\n  return dataUri;\n};\n/**\n * Whether the browser has built-in HLS support.\n */\n\n\nVhs.supportsNativeHls = function () {\n  if (!document || !document.createElement) {\n    return false;\n  }\n\n  var video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n  if (!videojs.getTech('Html5').isSupported()) {\n    return false;\n  } // HLS manifests can go by many mime-types\n\n\n  var canPlay = [// Apple santioned\n  'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility\n  'audio/mpegurl', // Very common\n  'audio/x-mpegurl', // Very common\n  'application/x-mpegurl', // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n  return canPlay.some(function (canItPlay) {\n    return /maybe|probably/i.test(video.canPlayType(canItPlay));\n  });\n}();\n\nVhs.supportsNativeDash = function () {\n  if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n}();\n\nVhs.supportsTypeNatively = function (type) {\n  if (type === 'hls') {\n    return Vhs.supportsNativeHls;\n  }\n\n  if (type === 'dash') {\n    return Vhs.supportsNativeDash;\n  }\n\n  return false;\n};\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n\nVhs.isSupported = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component = videojs.getComponent('Component');\n/**\n * The Vhs Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class VhsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar VhsHandler = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VhsHandler, _Component);\n\n  function VhsHandler(source, tech, options) {\n    var _this;\n\n    _this = _Component.call(this, tech, videojs.mergeOptions(options.hls, options.vhs)) || this;\n\n    if (options.hls && Object.keys(options.hls).length) {\n      videojs.log.warn('Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.');\n    } // if a tech level `initialBandwidth` option was passed\n    // use that over the VHS level `bandwidth` option\n\n\n    if (typeof options.initialBandwidth === 'number') {\n      _this.options_.bandwidth = options.initialBandwidth;\n    }\n\n    _this.logger_ = logger('VhsHandler'); // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = videojs(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get() {\n            videojs.log.warn('player.hls is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'hls-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('vhs')) {\n        Object.defineProperty(_player, 'vhs', {\n          get: function get() {\n            videojs.log.warn('player.vhs is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'vhs-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('dash')) {\n        Object.defineProperty(_player, 'dash', {\n          get: function get() {\n            videojs.log.warn('player.dash is deprecated. Use player.tech().vhs instead.');\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      _this.player_ = _player;\n    }\n\n    _this.tech_ = tech;\n    _this.source_ = source;\n    _this.stats = {};\n    _this.ignoreNextSeekingEvent_ = false;\n\n    _this.setOptions_();\n\n    if (_this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n      tech.overrideNativeAudioTracks(true);\n      tech.overrideNativeVideoTracks(true);\n    } else if (_this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      // overriding native HLS only works if audio tracks have been emulated\n      // error early if we're misconfigured\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    } // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n\n\n    _this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.fastQualityChange_();\n      } else {\n        // When leaving fullscreen, since the in page pixel dimensions should be smaller\n        // than full screen, see if there should be a rendition switch down to preserve\n        // bandwidth.\n        _this.masterPlaylistController_.checkABR_();\n      }\n    });\n\n    _this.on(_this.tech_, 'seeking', function () {\n      if (this.ignoreNextSeekingEvent_) {\n        this.ignoreNextSeekingEvent_ = false;\n        return;\n      }\n\n      this.setCurrentTime(this.tech_.currentTime());\n    });\n\n    _this.on(_this.tech_, 'error', function () {\n      // verify that the error was real and we are loaded\n      // enough to have mpc loaded.\n      if (this.tech_.error() && this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    _this.on(_this.tech_, 'play', _this.play);\n\n    return _this;\n  }\n\n  var _proto = VhsHandler.prototype;\n\n  _proto.setOptions_ = function setOptions_() {\n    var _this2 = this; // defaults\n\n\n    this.options_.withCredentials = this.options_.withCredentials || false;\n    this.options_.handleManifestRedirects = this.options_.handleManifestRedirects === false ? false : true;\n    this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n    this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;\n    this.options_.smoothQualityChange = this.options_.smoothQualityChange || false;\n    this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n    this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;\n    this.options_.useDtsForTimestampOffset = this.options_.useDtsForTimestampOffset || false;\n    this.options_.customTagParsers = this.options_.customTagParsers || [];\n    this.options_.customTagMappers = this.options_.customTagMappers || [];\n    this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n\n    if (typeof this.options_.blacklistDuration !== 'number') {\n      this.options_.blacklistDuration = 5 * 60;\n    }\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      if (this.options_.useBandwidthFromLocalStorage) {\n        var storedObject = getVhsLocalStorage();\n\n        if (storedObject && storedObject.bandwidth) {\n          this.options_.bandwidth = storedObject.bandwidth;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-bandwidth-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-bandwidth-from-local-storage'\n          });\n        }\n\n        if (storedObject && storedObject.throughput) {\n          this.options_.throughput = storedObject.throughput;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-throughput-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-throughput-from-local-storage'\n          });\n        }\n      }\n    } // if bandwidth was not set by options or pulled from local storage, start playlist\n    // selection at a reasonable bandwidth\n\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n    } // If the bandwidth number is unchanged from the initial setting\n    // then this takes precedence over the enableLowInitialPlaylist option\n\n\n    this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n    ['withCredentials', 'useDevicePixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'smoothQualityChange', 'customTagParsers', 'customTagMappers', 'handleManifestRedirects', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'experimentalBufferBasedABR', 'liveRangeSafeTimeDelta', 'experimentalLLHLS', 'useNetworkInformationApi', 'useDtsForTimestampOffset', 'experimentalExactManifestTimings', 'experimentalLeastPixelDiffSelector'].forEach(function (option) {\n      if (typeof _this2.source_[option] !== 'undefined') {\n        _this2.options_[option] = _this2.source_[option];\n      }\n    });\n    this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n    this.useDevicePixelRatio = this.options_.useDevicePixelRatio;\n  }\n  /**\n   * called when player.src gets called, handle a new source\n   *\n   * @param {Object} src the source object to handle\n   */\n  ;\n\n  _proto.src = function src(_src, type) {\n    var _this3 = this; // do nothing if the src is falsey\n\n\n    if (!_src) {\n      return;\n    }\n\n    this.setOptions_(); // add master playlist controller options\n\n    this.options_.src = expandDataUri(this.source_.src);\n    this.options_.tech = this.tech_;\n    this.options_.externVhs = Vhs;\n    this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech\n\n    this.options_.seekTo = function (time) {\n      _this3.tech_.setCurrentTime(time);\n    };\n\n    if (this.options_.smoothQualityChange) {\n      videojs.log.warn('smoothQualityChange is deprecated and will be removed in the next major version');\n    }\n\n    this.masterPlaylistController_ = new MasterPlaylistController(this.options_);\n    var playbackWatcherOptions = videojs.mergeOptions({\n      liveRangeSafeTimeDelta: SAFE_TIME_DELTA\n    }, this.options_, {\n      seekable: function seekable() {\n        return _this3.seekable();\n      },\n      media: function media() {\n        return _this3.masterPlaylistController_.media();\n      },\n      masterPlaylistController: this.masterPlaylistController_\n    });\n    this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);\n    this.masterPlaylistController_.on('error', function () {\n      var player = videojs.players[_this3.tech_.options_.playerId];\n      var error = _this3.masterPlaylistController_.error;\n\n      if (typeof error === 'object' && !error.code) {\n        error.code = 3;\n      } else if (typeof error === 'string') {\n        error = {\n          message: error,\n          code: 3\n        };\n      }\n\n      player.error(error);\n    });\n    var defaultSelector = this.options_.experimentalBufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards\n    // compatibility with < v2\n\n    this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);\n    this.masterPlaylistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n    this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n    this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist\n    // controller. Using a custom property for backwards compatibility\n    // with < v2\n\n    Object.defineProperties(this, {\n      selectPlaylist: {\n        get: function get() {\n          return this.masterPlaylistController_.selectPlaylist;\n        },\n        set: function set(selectPlaylist) {\n          this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n        }\n      },\n      throughput: {\n        get: function get() {\n          return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n        },\n        set: function set(throughput) {\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n          // for the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n        }\n      },\n      bandwidth: {\n        get: function get() {\n          var playerBandwidthEst = this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          var networkInformation = window$1.navigator.connection || window$1.navigator.mozConnection || window$1.navigator.webkitConnection;\n          var tenMbpsAsBitsPerSecond = 10e6;\n\n          if (this.options_.useNetworkInformationApi && networkInformation) {\n            // downlink returns Mbps\n            // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink\n            var networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player\n            // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that\n            // high quality streams are not filtered out.\n\n            if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {\n              playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);\n            } else {\n              playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;\n            }\n          }\n\n          return playerBandwidthEst;\n        },\n        set: function set(bandwidth) {\n          this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n          // `count` is set to zero that current value of `rate` isn't included\n          // in the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n            rate: 0,\n            count: 0\n          };\n        }\n      },\n\n      /**\n       * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n       * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n       * the entire process after that - decryption, transmuxing, and appending - provided\n       * by `throughput`.\n       *\n       * Since the two process are serial, the overall system bandwidth is given by:\n       *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n       */\n      systemBandwidth: {\n        get: function get() {\n          var invBandwidth = 1 / (this.bandwidth || 1);\n          var invThroughput;\n\n          if (this.throughput > 0) {\n            invThroughput = 1 / this.throughput;\n          } else {\n            invThroughput = 0;\n          }\n\n          var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n          return systemBitrate;\n        },\n        set: function set() {\n          videojs.log.error('The \"systemBandwidth\" property is read-only');\n        }\n      }\n    });\n\n    if (this.options_.bandwidth) {\n      this.bandwidth = this.options_.bandwidth;\n    }\n\n    if (this.options_.throughput) {\n      this.throughput = this.options_.throughput;\n    }\n\n    Object.defineProperties(this.stats, {\n      bandwidth: {\n        get: function get() {\n          return _this3.bandwidth || 0;\n        },\n        enumerable: true\n      },\n      mediaRequests: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequests_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsAborted: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsTimedout: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsErrored: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n        },\n        enumerable: true\n      },\n      mediaTransferDuration: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n        },\n        enumerable: true\n      },\n      mediaBytesTransferred: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n        },\n        enumerable: true\n      },\n      mediaSecondsLoaded: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n        },\n        enumerable: true\n      },\n      mediaAppends: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaAppends_() || 0;\n        },\n        enumerable: true\n      },\n      mainAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mainAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      audioAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.audioAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      appendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.appendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      timeToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.timeToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      buffered: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.buffered());\n        },\n        enumerable: true\n      },\n      currentTime: {\n        get: function get() {\n          return _this3.tech_.currentTime();\n        },\n        enumerable: true\n      },\n      currentSource: {\n        get: function get() {\n          return _this3.tech_.currentSource_;\n        },\n        enumerable: true\n      },\n      currentTech: {\n        get: function get() {\n          return _this3.tech_.name_;\n        },\n        enumerable: true\n      },\n      duration: {\n        get: function get() {\n          return _this3.tech_.duration();\n        },\n        enumerable: true\n      },\n      master: {\n        get: function get() {\n          return _this3.playlists.master;\n        },\n        enumerable: true\n      },\n      playerDimensions: {\n        get: function get() {\n          return _this3.tech_.currentDimensions();\n        },\n        enumerable: true\n      },\n      seekable: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.seekable());\n        },\n        enumerable: true\n      },\n      timestamp: {\n        get: function get() {\n          return Date.now();\n        },\n        enumerable: true\n      },\n      videoPlaybackQuality: {\n        get: function get() {\n          return _this3.tech_.getVideoPlaybackQuality();\n        },\n        enumerable: true\n      }\n    });\n    this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n    this.tech_.on('bandwidthupdate', function () {\n      if (_this3.options_.useBandwidthFromLocalStorage) {\n        updateVhsLocalStorage({\n          bandwidth: _this3.bandwidth,\n          throughput: Math.round(_this3.throughput)\n        });\n      }\n    });\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      // Add the manual rendition mix-in to VhsHandler\n      renditionSelectionMixin(_this3);\n    });\n    this.masterPlaylistController_.sourceUpdater_.on('createdsourcebuffers', function () {\n      _this3.setupEme_();\n    }); // the bandwidth of the primary segment loader is our best\n    // estimate of overall bandwidth\n\n    this.on(this.masterPlaylistController_, 'progress', function () {\n      this.tech_.trigger('progress');\n    }); // In the live case, we need to ignore the very first `seeking` event since\n    // that will be the result of the seek-to-live behavior\n\n    this.on(this.masterPlaylistController_, 'firstplay', function () {\n      this.ignoreNextSeekingEvent_ = true;\n    });\n    this.setupQualityLevels_(); // do nothing if the tech has been disposed already\n    // this can occur if someone sets the src in player.ready(), for instance\n\n    if (!this.tech_.el()) {\n      return;\n    }\n\n    this.mediaSourceUrl_ = window$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource);\n    this.tech_.src(this.mediaSourceUrl_);\n  };\n\n  _proto.createKeySessions_ = function createKeySessions_() {\n    var _this4 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    this.logger_('waiting for EME key session creation');\n    waitForKeySessionCreation({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),\n      mainPlaylists: this.playlists.master.playlists\n    }).then(function () {\n      _this4.logger_('created EME key session');\n\n      _this4.masterPlaylistController_.sourceUpdater_.initializedEme();\n    })[\"catch\"](function (err) {\n      _this4.logger_('error while creating EME key session', err);\n\n      _this4.player_.error({\n        message: 'Failed to initialize media keys for EME',\n        code: 3\n      });\n    });\n  };\n\n  _proto.handleWaitingForKey_ = function handleWaitingForKey_() {\n    // If waitingforkey is fired, it's possible that the data that's necessary to retrieve\n    // the key is in the manifest. While this should've happened on initial source load, it\n    // may happen again in live streams where the keys change, and the manifest info\n    // reflects the update.\n    //\n    // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's\n    // already requested keys for, we don't have to worry about this generating extraneous\n    // requests.\n    this.logger_('waitingforkey fired, attempting to create any new key sessions');\n    this.createKeySessions_();\n  }\n  /**\n   * If necessary and EME is available, sets up EME options and waits for key session\n   * creation.\n   *\n   * This function also updates the source updater so taht it can be used, as for some\n   * browsers, EME must be configured before content is appended (if appending unencrypted\n   * content before encrypted content).\n   */\n  ;\n\n  _proto.setupEme_ = function setupEme_() {\n    var _this5 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    var didSetupEmeOptions = setupEmeOptions({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      media: this.playlists.media(),\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()\n    });\n    this.player_.tech_.on('keystatuschange', function (e) {\n      if (e.status !== 'output-restricted') {\n        return;\n      }\n\n      var masterPlaylist = _this5.masterPlaylistController_.master();\n\n      if (!masterPlaylist || !masterPlaylist.playlists) {\n        return;\n      }\n\n      var excludedHDPlaylists = []; // Assume all HD streams are unplayable and exclude them from ABR selection\n\n      masterPlaylist.playlists.forEach(function (playlist) {\n        if (playlist && playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height >= 720) {\n          if (!playlist.excludeUntil || playlist.excludeUntil < Infinity) {\n            playlist.excludeUntil = Infinity;\n            excludedHDPlaylists.push(playlist);\n          }\n        }\n      });\n\n      if (excludedHDPlaylists.length) {\n        var _videojs$log;\n\n        (_videojs$log = videojs.log).warn.apply(_videojs$log, ['DRM keystatus changed to \"output-restricted.\" Removing the following HD playlists ' + 'that will most likely fail to play and clearing the buffer. ' + 'This may be due to HDCP restrictions on the stream and the capabilities of the current device.'].concat(excludedHDPlaylists)); // Clear the buffer before switching playlists, since it may already contain unplayable segments\n\n\n        _this5.masterPlaylistController_.fastQualityChange_();\n      }\n    });\n    this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);\n    this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_); // In IE11 this is too early to initialize media keys, and IE11 does not support\n    // promises.\n\n    if (videojs.browser.IE_VERSION === 11 || !didSetupEmeOptions) {\n      // If EME options were not set up, we've done all we could to initialize EME.\n      this.masterPlaylistController_.sourceUpdater_.initializedEme();\n      return;\n    }\n\n    this.createKeySessions_();\n  }\n  /**\n   * Initializes the quality levels and sets listeners to update them.\n   *\n   * @method setupQualityLevels_\n   * @private\n   */\n  ;\n\n  _proto.setupQualityLevels_ = function setupQualityLevels_() {\n    var _this6 = this;\n\n    var player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin\n    // or qualityLevels_ listeners have already been setup, do nothing.\n\n    if (!player || !player.qualityLevels || this.qualityLevels_) {\n      return;\n    }\n\n    this.qualityLevels_ = player.qualityLevels();\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      handleVhsLoadedMetadata(_this6.qualityLevels_, _this6);\n    });\n    this.playlists.on('mediachange', function () {\n      handleVhsMediaChange(_this6.qualityLevels_, _this6.playlists);\n    });\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  VhsHandler.version = function version$5() {\n    return {\n      '@videojs/http-streaming': version$4,\n      'mux.js': version$3,\n      'mpd-parser': version$2,\n      'm3u8-parser': version$1,\n      'aes-decrypter': version\n    };\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  _proto.version = function version() {\n    return this.constructor.version();\n  };\n\n  _proto.canChangeType = function canChangeType() {\n    return SourceUpdater.canChangeType();\n  }\n  /**\n   * Begin playing the video.\n   */\n  ;\n\n  _proto.play = function play() {\n    this.masterPlaylistController_.play();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    this.masterPlaylistController_.setCurrentTime(currentTime);\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.duration = function duration() {\n    return this.masterPlaylistController_.duration();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.masterPlaylistController_.seekable();\n  }\n  /**\n   * Abort all outstanding work and cleanup.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.playbackWatcher_) {\n      this.playbackWatcher_.dispose();\n    }\n\n    if (this.masterPlaylistController_) {\n      this.masterPlaylistController_.dispose();\n    }\n\n    if (this.qualityLevels_) {\n      this.qualityLevels_.dispose();\n    }\n\n    if (this.player_) {\n      delete this.player_.vhs;\n      delete this.player_.dash;\n      delete this.player_.hls;\n    }\n\n    if (this.tech_ && this.tech_.vhs) {\n      delete this.tech_.vhs;\n    } // don't check this.tech_.hls as it will log a deprecated warning\n\n\n    if (this.tech_) {\n      delete this.tech_.hls;\n    }\n\n    if (this.mediaSourceUrl_ && window$1.URL.revokeObjectURL) {\n      window$1.URL.revokeObjectURL(this.mediaSourceUrl_);\n      this.mediaSourceUrl_ = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.off('waitingforkey', this.handleWaitingForKey_);\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  _proto.convertToProgramTime = function convertToProgramTime(time, callback) {\n    return getProgramTime({\n      playlist: this.masterPlaylistController_.media(),\n      time: time,\n      callback: callback\n    });\n  } // the player must be playing before calling this\n  ;\n\n  _proto.seekToProgramTime = function seekToProgramTime$1(programTime, callback, pauseAfterSeek, retryCount) {\n    if (pauseAfterSeek === void 0) {\n      pauseAfterSeek = true;\n    }\n\n    if (retryCount === void 0) {\n      retryCount = 2;\n    }\n\n    return seekToProgramTime({\n      programTime: programTime,\n      playlist: this.masterPlaylistController_.media(),\n      retryCount: retryCount,\n      pauseAfterSeek: pauseAfterSeek,\n      seekTo: this.options_.seekTo,\n      tech: this.options_.tech,\n      callback: callback\n    });\n  };\n\n  return VhsHandler;\n}(Component);\n/**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n\nvar VhsSourceHandler = {\n  name: 'videojs-http-streaming',\n  VERSION: version$4,\n  canHandleSource: function canHandleSource(srcObj, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    return VhsSourceHandler.canPlayType(srcObj.type, localOptions);\n  },\n  handleSource: function handleSource(source, tech, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    tech.vhs = new VhsHandler(source, tech, localOptions);\n\n    if (!videojs.hasOwnProperty('hls')) {\n      Object.defineProperty(tech, 'hls', {\n        get: function get() {\n          videojs.log.warn('player.tech().hls is deprecated. Use player.tech().vhs instead.');\n          return tech.vhs;\n        },\n        configurable: true\n      });\n    }\n\n    tech.vhs.xhr = xhrFactory();\n    tech.vhs.src(source.src, source.type);\n    return tech.vhs;\n  },\n  canPlayType: function canPlayType(type, options) {\n    var simpleType = simpleTypeFromSourceType(type);\n\n    if (!simpleType) {\n      return '';\n    }\n\n    var overrideNative = VhsSourceHandler.getOverrideNative(options);\n    var supportsTypeNatively = Vhs.supportsTypeNatively(simpleType);\n    var canUseMsePlayback = !supportsTypeNatively || overrideNative;\n    return canUseMsePlayback ? 'maybe' : '';\n  },\n  getOverrideNative: function getOverrideNative(options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var _options = options,\n        _options$vhs = _options.vhs,\n        vhs = _options$vhs === void 0 ? {} : _options$vhs,\n        _options$hls = _options.hls,\n        hls = _options$hls === void 0 ? {} : _options$hls;\n    var defaultOverrideNative = !(videojs.browser.IS_ANY_SAFARI || videojs.browser.IS_IOS);\n    var _vhs$overrideNative = vhs.overrideNative,\n        overrideNative = _vhs$overrideNative === void 0 ? defaultOverrideNative : _vhs$overrideNative;\n    var _hls$overrideNative = hls.overrideNative,\n        legacyOverrideNative = _hls$overrideNative === void 0 ? false : _hls$overrideNative;\n    return legacyOverrideNative || overrideNative;\n  }\n};\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {boolean} if  native media sources are supported\n */\n\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return browserSupportsCodec('avc1.4d400d,mp4a.40.2');\n}; // register source handlers with the appropriate techs\n\n\nif (supportsNativeMediaSources()) {\n  videojs.getTech('Html5').registerSourceHandler(VhsSourceHandler, 0);\n}\n\nvideojs.VhsHandler = VhsHandler;\nObject.defineProperty(videojs, 'HlsHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsHandler is deprecated. Use videojs.VhsHandler instead.');\n    return VhsHandler;\n  },\n  configurable: true\n});\nvideojs.VhsSourceHandler = VhsSourceHandler;\nObject.defineProperty(videojs, 'HlsSourceHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsSourceHandler is deprecated. ' + 'Use videojs.VhsSourceHandler instead.');\n    return VhsSourceHandler;\n  },\n  configurable: true\n});\nvideojs.Vhs = Vhs;\nObject.defineProperty(videojs, 'Hls', {\n  get: function get() {\n    videojs.log.warn('videojs.Hls is deprecated. Use videojs.Vhs instead.');\n    return Vhs;\n  },\n  configurable: true\n});\n\nif (!videojs.use) {\n  videojs.registerComponent('Hls', Vhs);\n  videojs.registerComponent('Vhs', Vhs);\n}\n\nvideojs.options.vhs = videojs.options.vhs || {};\nvideojs.options.hls = videojs.options.hls || {};\n\nif (!videojs.getPlugin || !videojs.getPlugin('reloadSourceOnError')) {\n  var registerPlugin = videojs.registerPlugin || videojs.plugin;\n  registerPlugin('reloadSourceOnError', reloadSourceOnError);\n}\n\nexport default videojs;\n","import { stringToBytes, toUint8, bytesMatch, bytesToString, toHexString, padStart, bytesToNumber } from './byte-helpers.js';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js';\nimport { parseOpusHead } from './opus-helpers.js';\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return stringToBytes(path);\n  }\n\n  if (typeof path === 'number') {\n    return path;\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar DESCRIPTORS;\nexport var parseDescriptors = function parseDescriptors(bytes) {\n  bytes = toUint8(bytes);\n  var results = [];\n  var i = 0;\n\n  while (bytes.length > i) {\n    var tag = bytes[i];\n    var size = 0;\n    var headerSize = 0; // tag\n\n    headerSize++;\n    var byte = bytes[headerSize]; // first byte\n\n    headerSize++;\n\n    while (byte & 0x80) {\n      size = (byte & 0x7F) << 7;\n      byte = bytes[headerSize];\n      headerSize++;\n    }\n\n    size += byte & 0x7F;\n\n    for (var z = 0; z < DESCRIPTORS.length; z++) {\n      var _DESCRIPTORS$z = DESCRIPTORS[z],\n          id = _DESCRIPTORS$z.id,\n          parser = _DESCRIPTORS$z.parser;\n\n      if (tag === id) {\n        results.push(parser(bytes.subarray(headerSize, headerSize + size)));\n        break;\n      }\n    }\n\n    i += size + headerSize;\n  }\n\n  return results;\n};\nDESCRIPTORS = [{\n  id: 0x03,\n  parser: function parser(bytes) {\n    var desc = {\n      tag: 0x03,\n      id: bytes[0] << 8 | bytes[1],\n      flags: bytes[2],\n      size: 3,\n      dependsOnEsId: 0,\n      ocrEsId: 0,\n      descriptors: [],\n      url: ''\n    }; // depends on es id\n\n    if (desc.flags & 0x80) {\n      desc.dependsOnEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    } // url\n\n\n    if (desc.flags & 0x40) {\n      var len = bytes[desc.size];\n      desc.url = bytesToString(bytes.subarray(desc.size + 1, desc.size + 1 + len));\n      desc.size += len;\n    } // ocr es id\n\n\n    if (desc.flags & 0x20) {\n      desc.ocrEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    }\n\n    desc.descriptors = parseDescriptors(bytes.subarray(desc.size)) || [];\n    return desc;\n  }\n}, {\n  id: 0x04,\n  parser: function parser(bytes) {\n    // DecoderConfigDescriptor\n    var desc = {\n      tag: 0x04,\n      oti: bytes[0],\n      streamType: bytes[1],\n      bufferSize: bytes[2] << 16 | bytes[3] << 8 | bytes[4],\n      maxBitrate: bytes[5] << 24 | bytes[6] << 16 | bytes[7] << 8 | bytes[8],\n      avgBitrate: bytes[9] << 24 | bytes[10] << 16 | bytes[11] << 8 | bytes[12],\n      descriptors: parseDescriptors(bytes.subarray(13))\n    };\n    return desc;\n  }\n}, {\n  id: 0x05,\n  parser: function parser(bytes) {\n    // DecoderSpecificInfo\n    return {\n      tag: 0x05,\n      bytes: bytes\n    };\n  }\n}, {\n  id: 0x06,\n  parser: function parser(bytes) {\n    // SLConfigDescriptor\n    return {\n      tag: 0x06,\n      bytes: bytes\n    };\n  }\n}];\n/**\n * find any number of boxes by name given a path to it in an iso bmff\n * such as mp4.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {Uint8Array[]|string[]|string|Uint8Array} name\n *        An array of paths or a single path representing the name\n *        of boxes to search through in bytes. Paths may be\n *        uint8 (character codes) or strings.\n *\n * @param {boolean} [complete=false]\n *        Should we search only for complete boxes on the final path.\n *        This is very useful when you do not want to get back partial boxes\n *        in the case of streaming files.\n *\n * @return {Uint8Array[]}\n *         An array of the end paths that we found.\n */\n\nexport var findBox = function findBox(bytes, paths, complete) {\n  if (complete === void 0) {\n    complete = false;\n  }\n\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    // short-circuit the search for empty paths\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var size = (bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]) >>> 0;\n    var type = bytes.subarray(i + 4, i + 8); // invalid box format.\n\n    if (size === 0) {\n      break;\n    }\n\n    var end = i + size;\n\n    if (end > bytes.length) {\n      // this box is bigger than the number of bytes we have\n      // and complete is set, we cannot find any more boxes.\n      if (complete) {\n        break;\n      }\n\n      end = bytes.length;\n    }\n\n    var data = bytes.subarray(i + 8, end);\n\n    if (bytesMatch(type, paths[0])) {\n      if (paths.length === 1) {\n        // this is the end of the path and we've found the box we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next box along the path\n        results.push.apply(results, findBox(data, paths.slice(1), complete));\n      }\n    }\n\n    i = end;\n  } // we've finished searching all of bytes\n\n\n  return results;\n};\n/**\n * Search for a single matching box by name in an iso bmff format like\n * mp4. This function is useful for finding codec boxes which\n * can be placed arbitrarily in sample descriptions depending\n * on the version of the file or file type.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {string|Uint8Array} name\n *        The name of the box to find.\n *\n * @return {Uint8Array[]}\n *         a subarray of bytes representing the name boxed we found.\n */\n\nexport var findNamedBox = function findNamedBox(bytes, name) {\n  name = normalizePath(name);\n\n  if (!name.length) {\n    // short-circuit the search for empty paths\n    return bytes.subarray(bytes.length);\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    if (bytesMatch(bytes.subarray(i, i + name.length), name)) {\n      var size = (bytes[i - 4] << 24 | bytes[i - 3] << 16 | bytes[i - 2] << 8 | bytes[i - 1]) >>> 0;\n      var end = size > 1 ? i + size : bytes.byteLength;\n      return bytes.subarray(i + 4, end);\n    }\n\n    i++;\n  } // we've finished searching all of bytes\n\n\n  return bytes.subarray(bytes.length);\n};\n\nvar parseSamples = function parseSamples(data, entrySize, parseEntry) {\n  if (entrySize === void 0) {\n    entrySize = 4;\n  }\n\n  if (parseEntry === void 0) {\n    parseEntry = function parseEntry(d) {\n      return bytesToNumber(d);\n    };\n  }\n\n  var entries = [];\n\n  if (!data || !data.length) {\n    return entries;\n  }\n\n  var entryCount = bytesToNumber(data.subarray(4, 8));\n\n  for (var i = 8; entryCount; i += entrySize, entryCount--) {\n    entries.push(parseEntry(data.subarray(i, i + entrySize)));\n  }\n\n  return entries;\n};\n\nexport var buildFrameTable = function buildFrameTable(stbl, timescale) {\n  var keySamples = parseSamples(findBox(stbl, ['stss'])[0]);\n  var chunkOffsets = parseSamples(findBox(stbl, ['stco'])[0]);\n  var timeToSamples = parseSamples(findBox(stbl, ['stts'])[0], 8, function (entry) {\n    return {\n      sampleCount: bytesToNumber(entry.subarray(0, 4)),\n      sampleDelta: bytesToNumber(entry.subarray(4, 8))\n    };\n  });\n  var samplesToChunks = parseSamples(findBox(stbl, ['stsc'])[0], 12, function (entry) {\n    return {\n      firstChunk: bytesToNumber(entry.subarray(0, 4)),\n      samplesPerChunk: bytesToNumber(entry.subarray(4, 8)),\n      sampleDescriptionIndex: bytesToNumber(entry.subarray(8, 12))\n    };\n  });\n  var stsz = findBox(stbl, ['stsz'])[0]; // stsz starts with a 4 byte sampleSize which we don't need\n\n  var sampleSizes = parseSamples(stsz && stsz.length && stsz.subarray(4) || null);\n  var frames = [];\n\n  for (var chunkIndex = 0; chunkIndex < chunkOffsets.length; chunkIndex++) {\n    var samplesInChunk = void 0;\n\n    for (var i = 0; i < samplesToChunks.length; i++) {\n      var sampleToChunk = samplesToChunks[i];\n      var isThisOne = chunkIndex + 1 >= sampleToChunk.firstChunk && (i + 1 >= samplesToChunks.length || chunkIndex + 1 < samplesToChunks[i + 1].firstChunk);\n\n      if (isThisOne) {\n        samplesInChunk = sampleToChunk.samplesPerChunk;\n        break;\n      }\n    }\n\n    var chunkOffset = chunkOffsets[chunkIndex];\n\n    for (var _i = 0; _i < samplesInChunk; _i++) {\n      var frameEnd = sampleSizes[frames.length]; // if we don't have key samples every frame is a keyframe\n\n      var keyframe = !keySamples.length;\n\n      if (keySamples.length && keySamples.indexOf(frames.length + 1) !== -1) {\n        keyframe = true;\n      }\n\n      var frame = {\n        keyframe: keyframe,\n        start: chunkOffset,\n        end: chunkOffset + frameEnd\n      };\n\n      for (var k = 0; k < timeToSamples.length; k++) {\n        var _timeToSamples$k = timeToSamples[k],\n            sampleCount = _timeToSamples$k.sampleCount,\n            sampleDelta = _timeToSamples$k.sampleDelta;\n\n        if (frames.length <= sampleCount) {\n          // ms to ns\n          var lastTimestamp = frames.length ? frames[frames.length - 1].timestamp : 0;\n          frame.timestamp = lastTimestamp + sampleDelta / timescale * 1000;\n          frame.duration = sampleDelta;\n          break;\n        }\n      }\n\n      frames.push(frame);\n      chunkOffset += frameEnd;\n    }\n  }\n\n  return frames;\n};\nexport var addSampleDescription = function addSampleDescription(track, bytes) {\n  var codec = bytesToString(bytes.subarray(0, 4));\n\n  if (track.type === 'video') {\n    track.info = track.info || {};\n    track.info.width = bytes[28] << 8 | bytes[29];\n    track.info.height = bytes[30] << 8 | bytes[31];\n  } else if (track.type === 'audio') {\n    track.info = track.info || {};\n    track.info.channels = bytes[20] << 8 | bytes[21];\n    track.info.bitDepth = bytes[22] << 8 | bytes[23];\n    track.info.sampleRate = bytes[28] << 8 | bytes[29];\n  }\n\n  if (codec === 'avc1') {\n    var avcC = findNamedBox(bytes, 'avcC'); // AVCDecoderConfigurationRecord\n\n    codec += \".\" + getAvcCodec(avcC);\n    track.info.avcC = avcC; // TODO: do we need to parse all this?\n\n    /* {\n      configurationVersion: avcC[0],\n      profile: avcC[1],\n      profileCompatibility: avcC[2],\n      level: avcC[3],\n      lengthSizeMinusOne: avcC[4] & 0x3\n    };\n     let spsNalUnitCount = avcC[5] & 0x1F;\n    const spsNalUnits = track.info.avc.spsNalUnits = [];\n     // past spsNalUnitCount\n    let offset = 6;\n     while (spsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       spsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }\n    let ppsNalUnitCount = avcC[offset];\n    const ppsNalUnits = track.info.avc.ppsNalUnits = [];\n     // past ppsNalUnitCount\n    offset += 1;\n     while (ppsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       ppsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }*/\n    // HEVCDecoderConfigurationRecord\n  } else if (codec === 'hvc1' || codec === 'hev1') {\n    codec += \".\" + getHvcCodec(findNamedBox(bytes, 'hvcC'));\n  } else if (codec === 'mp4a' || codec === 'mp4v') {\n    var esds = findNamedBox(bytes, 'esds');\n    var esDescriptor = parseDescriptors(esds.subarray(4))[0];\n    var decoderConfig = esDescriptor && esDescriptor.descriptors.filter(function (_ref) {\n      var tag = _ref.tag;\n      return tag === 0x04;\n    })[0];\n\n    if (decoderConfig) {\n      // most codecs do not have a further '.'\n      // such as 0xa5 for ac-3 and 0xa6 for e-ac-3\n      codec += '.' + toHexString(decoderConfig.oti);\n\n      if (decoderConfig.oti === 0x40) {\n        codec += '.' + (decoderConfig.descriptors[0].bytes[0] >> 3).toString();\n      } else if (decoderConfig.oti === 0x20) {\n        codec += '.' + decoderConfig.descriptors[0].bytes[4].toString();\n      } else if (decoderConfig.oti === 0xdd) {\n        codec = 'vorbis';\n      }\n    } else if (track.type === 'audio') {\n      codec += '.40.2';\n    } else {\n      codec += '.20.9';\n    }\n  } else if (codec === 'av01') {\n    // AV1DecoderConfigurationRecord\n    codec += \".\" + getAv1Codec(findNamedBox(bytes, 'av1C'));\n  } else if (codec === 'vp09') {\n    // VPCodecConfigurationRecord\n    var vpcC = findNamedBox(bytes, 'vpcC'); // https://www.webmproject.org/vp9/mp4/\n\n    var profile = vpcC[0];\n    var level = vpcC[1];\n    var bitDepth = vpcC[2] >> 4;\n    var chromaSubsampling = (vpcC[2] & 0x0F) >> 1;\n    var videoFullRangeFlag = (vpcC[2] & 0x0F) >> 3;\n    var colourPrimaries = vpcC[3];\n    var transferCharacteristics = vpcC[4];\n    var matrixCoefficients = vpcC[5];\n    codec += \".\" + padStart(profile, 2, '0');\n    codec += \".\" + padStart(level, 2, '0');\n    codec += \".\" + padStart(bitDepth, 2, '0');\n    codec += \".\" + padStart(chromaSubsampling, 2, '0');\n    codec += \".\" + padStart(colourPrimaries, 2, '0');\n    codec += \".\" + padStart(transferCharacteristics, 2, '0');\n    codec += \".\" + padStart(matrixCoefficients, 2, '0');\n    codec += \".\" + padStart(videoFullRangeFlag, 2, '0');\n  } else if (codec === 'theo') {\n    codec = 'theora';\n  } else if (codec === 'spex') {\n    codec = 'speex';\n  } else if (codec === '.mp3') {\n    codec = 'mp4a.40.34';\n  } else if (codec === 'msVo') {\n    codec = 'vorbis';\n  } else if (codec === 'Opus') {\n    codec = 'opus';\n    var dOps = findNamedBox(bytes, 'dOps');\n    track.info.opus = parseOpusHead(dOps); // TODO: should this go into the webm code??\n    // Firefox requires a codecDelay for opus playback\n    // see https://bugzilla.mozilla.org/show_bug.cgi?id=1276238\n\n    track.info.codecDelay = 6500000;\n  } else {\n    codec = codec.toLowerCase();\n  }\n  /* eslint-enable */\n  // flac, ac-3, ec-3, opus\n\n\n  track.codec = codec;\n};\nexport var parseTracks = function parseTracks(bytes, frameTable) {\n  if (frameTable === void 0) {\n    frameTable = true;\n  }\n\n  bytes = toUint8(bytes);\n  var traks = findBox(bytes, ['moov', 'trak'], true);\n  var tracks = [];\n  traks.forEach(function (trak) {\n    var track = {\n      bytes: trak\n    };\n    var mdia = findBox(trak, ['mdia'])[0];\n    var hdlr = findBox(mdia, ['hdlr'])[0];\n    var trakType = bytesToString(hdlr.subarray(8, 12));\n\n    if (trakType === 'soun') {\n      track.type = 'audio';\n    } else if (trakType === 'vide') {\n      track.type = 'video';\n    } else {\n      track.type = trakType;\n    }\n\n    var tkhd = findBox(trak, ['tkhd'])[0];\n\n    if (tkhd) {\n      var view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n      var tkhdVersion = view.getUint8(0);\n      track.number = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n    }\n\n    var mdhd = findBox(mdia, ['mdhd'])[0];\n\n    if (mdhd) {\n      // mdhd is a FullBox, meaning it will have its own version as the first byte\n      var version = mdhd[0];\n      var index = version === 0 ? 12 : 20;\n      track.timescale = (mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]) >>> 0;\n    }\n\n    var stbl = findBox(mdia, ['minf', 'stbl'])[0];\n    var stsd = findBox(stbl, ['stsd'])[0];\n    var descriptionCount = bytesToNumber(stsd.subarray(4, 8));\n    var offset = 8; // add codec and codec info\n\n    while (descriptionCount--) {\n      var len = bytesToNumber(stsd.subarray(offset, offset + 4));\n      var sampleDescriptor = stsd.subarray(offset + 4, offset + 4 + len);\n      addSampleDescription(track, sampleDescriptor);\n      offset += 4 + len;\n    }\n\n    if (frameTable) {\n      track.frameTable = buildFrameTable(stbl, track.timescale);\n    } // codec has no sub parameters\n\n\n    tracks.push(track);\n  });\n  return tracks;\n};\nexport var parseMediaInfo = function parseMediaInfo(bytes) {\n  var mvhd = findBox(bytes, ['moov', 'mvhd'], true)[0];\n\n  if (!mvhd || !mvhd.length) {\n    return;\n  }\n\n  var info = {}; // ms to ns\n  // mvhd v1 has 8 byte duration and other fields too\n\n  if (mvhd[0] === 1) {\n    info.timestampScale = bytesToNumber(mvhd.subarray(20, 24));\n    info.duration = bytesToNumber(mvhd.subarray(24, 32));\n  } else {\n    info.timestampScale = bytesToNumber(mvhd.subarray(12, 16));\n    info.duration = bytesToNumber(mvhd.subarray(16, 20));\n  }\n\n  info.bytes = mvhd;\n  return info;\n};","export var OPUS_HEAD = new Uint8Array([// O, p, u, s\n0x4f, 0x70, 0x75, 0x73, // H, e, a, d\n0x48, 0x65, 0x61, 0x64]); // https://wiki.xiph.org/OggOpus\n// https://vfrmaniac.fushizen.eu/contents/opus_in_isobmff.html\n// https://opus-codec.org/docs/opusfile_api-0.7/structOpusHead.html\n\nexport var parseOpusHead = function parseOpusHead(bytes) {\n  var view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);\n  var version = view.getUint8(0); // version 0, from mp4, does not use littleEndian.\n\n  var littleEndian = version !== 0;\n  var config = {\n    version: version,\n    channels: view.getUint8(1),\n    preSkip: view.getUint16(2, littleEndian),\n    sampleRate: view.getUint32(4, littleEndian),\n    outputGain: view.getUint16(8, littleEndian),\n    channelMappingFamily: view.getUint8(10)\n  };\n\n  if (config.channelMappingFamily > 0 && bytes.length > 10) {\n    config.streamCount = view.getUint8(11);\n    config.twoChannelStreamCount = view.getUint8(12);\n    config.channelMapping = [];\n\n    for (var c = 0; c < config.channels; c++) {\n      config.channelMapping.push(view.getUint8(13 + c));\n    }\n  }\n\n  return config;\n};\nexport var setOpusHead = function setOpusHead(config) {\n  var size = config.channelMappingFamily <= 0 ? 11 : 12 + config.channels;\n  var view = new DataView(new ArrayBuffer(size));\n  var littleEndian = config.version !== 0;\n  view.setUint8(0, config.version);\n  view.setUint8(1, config.channels);\n  view.setUint16(2, config.preSkip, littleEndian);\n  view.setUint32(4, config.sampleRate, littleEndian);\n  view.setUint16(8, config.outputGain, littleEndian);\n  view.setUint8(10, config.channelMappingFamily);\n\n  if (config.channelMappingFamily > 0) {\n    view.setUint8(11, config.streamCount);\n    config.channelMapping.foreach(function (cm, i) {\n      view.setUint8(12 + i, cm);\n    });\n  }\n\n  return new Uint8Array(view.buffer);\n};","import { toUint8, bytesToNumber, bytesMatch, bytesToString, numberToBytes, padStart } from './byte-helpers';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js'; // relevant specs for this parser:\n// https://matroska-org.github.io/libebml/specs.html\n// https://www.matroska.org/technical/elements.html\n// https://www.webmproject.org/docs/container/\n\nexport var EBML_TAGS = {\n  EBML: toUint8([0x1A, 0x45, 0xDF, 0xA3]),\n  DocType: toUint8([0x42, 0x82]),\n  Segment: toUint8([0x18, 0x53, 0x80, 0x67]),\n  SegmentInfo: toUint8([0x15, 0x49, 0xA9, 0x66]),\n  Tracks: toUint8([0x16, 0x54, 0xAE, 0x6B]),\n  Track: toUint8([0xAE]),\n  TrackNumber: toUint8([0xd7]),\n  DefaultDuration: toUint8([0x23, 0xe3, 0x83]),\n  TrackEntry: toUint8([0xAE]),\n  TrackType: toUint8([0x83]),\n  FlagDefault: toUint8([0x88]),\n  CodecID: toUint8([0x86]),\n  CodecPrivate: toUint8([0x63, 0xA2]),\n  VideoTrack: toUint8([0xe0]),\n  AudioTrack: toUint8([0xe1]),\n  // Not used yet, but will be used for live webm/mkv\n  // see https://www.matroska.org/technical/basics.html#block-structure\n  // see https://www.matroska.org/technical/basics.html#simpleblock-structure\n  Cluster: toUint8([0x1F, 0x43, 0xB6, 0x75]),\n  Timestamp: toUint8([0xE7]),\n  TimestampScale: toUint8([0x2A, 0xD7, 0xB1]),\n  BlockGroup: toUint8([0xA0]),\n  BlockDuration: toUint8([0x9B]),\n  Block: toUint8([0xA1]),\n  SimpleBlock: toUint8([0xA3])\n};\n/**\n * This is a simple table to determine the length\n * of things in ebml. The length is one based (starts at 1,\n * rather than zero) and for every zero bit before a one bit\n * we add one to length. We also need this table because in some\n * case we have to xor all the length bits from another value.\n */\n\nvar LENGTH_TABLE = [128, 64, 32, 16, 8, 4, 2, 1];\n\nvar getLength = function getLength(byte) {\n  var len = 1;\n\n  for (var i = 0; i < LENGTH_TABLE.length; i++) {\n    if (byte & LENGTH_TABLE[i]) {\n      break;\n    }\n\n    len++;\n  }\n\n  return len;\n}; // length in ebml is stored in the first 4 to 8 bits\n// of the first byte. 4 for the id length and 8 for the\n// data size length. Length is measured by converting the number to binary\n// then 1 + the number of zeros before a 1 is encountered starting\n// from the left.\n\n\nvar getvint = function getvint(bytes, offset, removeLength, signed) {\n  if (removeLength === void 0) {\n    removeLength = true;\n  }\n\n  if (signed === void 0) {\n    signed = false;\n  }\n\n  var length = getLength(bytes[offset]);\n  var valueBytes = bytes.subarray(offset, offset + length); // NOTE that we do **not** subarray here because we need to copy these bytes\n  // as they will be modified below to remove the dataSizeLen bits and we do not\n  // want to modify the original data. normally we could just call slice on\n  // uint8array but ie 11 does not support that...\n\n  if (removeLength) {\n    valueBytes = Array.prototype.slice.call(bytes, offset, offset + length);\n    valueBytes[0] ^= LENGTH_TABLE[length - 1];\n  }\n\n  return {\n    length: length,\n    value: bytesToNumber(valueBytes, {\n      signed: signed\n    }),\n    bytes: valueBytes\n  };\n};\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return path.match(/.{1,2}/g).map(function (p) {\n      return normalizePath(p);\n    });\n  }\n\n  if (typeof path === 'number') {\n    return numberToBytes(path);\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar getInfinityDataSize = function getInfinityDataSize(id, bytes, offset) {\n  if (offset >= bytes.length) {\n    return bytes.length;\n  }\n\n  var innerid = getvint(bytes, offset, false);\n\n  if (bytesMatch(id.bytes, innerid.bytes)) {\n    return offset;\n  }\n\n  var dataHeader = getvint(bytes, offset + innerid.length);\n  return getInfinityDataSize(id, bytes, offset + dataHeader.length + dataHeader.value + innerid.length);\n};\n/**\n * Notes on the EBLM format.\n *\n * EBLM uses \"vints\" tags. Every vint tag contains\n * two parts\n *\n * 1. The length from the first byte. You get this by\n *    converting the byte to binary and counting the zeros\n *    before a 1. Then you add 1 to that. Examples\n *    00011111 = length 4 because there are 3 zeros before a 1.\n *    00100000 = length 3 because there are 2 zeros before a 1.\n *    00000011 = length 7 because there are 6 zeros before a 1.\n *\n * 2. The bits used for length are removed from the first byte\n *    Then all the bytes are merged into a value. NOTE: this\n *    is not the case for id ebml tags as there id includes\n *    length bits.\n *\n */\n\n\nexport var findEbml = function findEbml(bytes, paths) {\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var id = getvint(bytes, i, false);\n    var dataHeader = getvint(bytes, i + id.length);\n    var dataStart = i + id.length + dataHeader.length; // dataSize is unknown or this is a live stream\n\n    if (dataHeader.value === 0x7f) {\n      dataHeader.value = getInfinityDataSize(id, bytes, dataStart);\n\n      if (dataHeader.value !== bytes.length) {\n        dataHeader.value -= dataStart;\n      }\n    }\n\n    var dataEnd = dataStart + dataHeader.value > bytes.length ? bytes.length : dataStart + dataHeader.value;\n    var data = bytes.subarray(dataStart, dataEnd);\n\n    if (bytesMatch(paths[0], id.bytes)) {\n      if (paths.length === 1) {\n        // this is the end of the paths and we've found the tag we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next tag inside of the data\n        // of this one\n        results = results.concat(findEbml(data, paths.slice(1)));\n      }\n    }\n\n    var totalLength = id.length + dataHeader.length + data.length; // move past this tag entirely, we are not looking for it\n\n    i += totalLength;\n  }\n\n  return results;\n}; // see https://www.matroska.org/technical/basics.html#block-structure\n\nexport var decodeBlock = function decodeBlock(block, type, timestampScale, clusterTimestamp) {\n  var duration;\n\n  if (type === 'group') {\n    duration = findEbml(block, [EBML_TAGS.BlockDuration])[0];\n\n    if (duration) {\n      duration = bytesToNumber(duration);\n      duration = 1 / timestampScale * duration * timestampScale / 1000;\n    }\n\n    block = findEbml(block, [EBML_TAGS.Block])[0];\n    type = 'block'; // treat data as a block after this point\n  }\n\n  var dv = new DataView(block.buffer, block.byteOffset, block.byteLength);\n  var trackNumber = getvint(block, 0);\n  var timestamp = dv.getInt16(trackNumber.length, false);\n  var flags = block[trackNumber.length + 2];\n  var data = block.subarray(trackNumber.length + 3); // pts/dts in seconds\n\n  var ptsdts = 1 / timestampScale * (clusterTimestamp + timestamp) * timestampScale / 1000; // return the frame\n\n  var parsed = {\n    duration: duration,\n    trackNumber: trackNumber.value,\n    keyframe: type === 'simple' && flags >> 7 === 1,\n    invisible: (flags & 0x08) >> 3 === 1,\n    lacing: (flags & 0x06) >> 1,\n    discardable: type === 'simple' && (flags & 0x01) === 1,\n    frames: [],\n    pts: ptsdts,\n    dts: ptsdts,\n    timestamp: timestamp\n  };\n\n  if (!parsed.lacing) {\n    parsed.frames.push(data);\n    return parsed;\n  }\n\n  var numberOfFrames = data[0] + 1;\n  var frameSizes = [];\n  var offset = 1; // Fixed\n\n  if (parsed.lacing === 2) {\n    var sizeOfFrame = (data.length - offset) / numberOfFrames;\n\n    for (var i = 0; i < numberOfFrames; i++) {\n      frameSizes.push(sizeOfFrame);\n    }\n  } // xiph\n\n\n  if (parsed.lacing === 1) {\n    for (var _i = 0; _i < numberOfFrames - 1; _i++) {\n      var size = 0;\n\n      do {\n        size += data[offset];\n        offset++;\n      } while (data[offset - 1] === 0xFF);\n\n      frameSizes.push(size);\n    }\n  } // ebml\n\n\n  if (parsed.lacing === 3) {\n    // first vint is unsinged\n    // after that vints are singed and\n    // based on a compounding size\n    var _size = 0;\n\n    for (var _i2 = 0; _i2 < numberOfFrames - 1; _i2++) {\n      var vint = _i2 === 0 ? getvint(data, offset) : getvint(data, offset, true, true);\n      _size += vint.value;\n      frameSizes.push(_size);\n      offset += vint.length;\n    }\n  }\n\n  frameSizes.forEach(function (size) {\n    parsed.frames.push(data.subarray(offset, offset + size));\n    offset += size;\n  });\n  return parsed;\n}; // VP9 Codec Feature Metadata (CodecPrivate)\n// https://www.webmproject.org/docs/container/\n\nvar parseVp9Private = function parseVp9Private(bytes) {\n  var i = 0;\n  var params = {};\n\n  while (i < bytes.length) {\n    var id = bytes[i] & 0x7f;\n    var len = bytes[i + 1];\n    var val = void 0;\n\n    if (len === 1) {\n      val = bytes[i + 2];\n    } else {\n      val = bytes.subarray(i + 2, i + 2 + len);\n    }\n\n    if (id === 1) {\n      params.profile = val;\n    } else if (id === 2) {\n      params.level = val;\n    } else if (id === 3) {\n      params.bitDepth = val;\n    } else if (id === 4) {\n      params.chromaSubsampling = val;\n    } else {\n      params[id] = val;\n    }\n\n    i += 2 + len;\n  }\n\n  return params;\n};\n\nexport var parseTracks = function parseTracks(bytes) {\n  bytes = toUint8(bytes);\n  var decodedTracks = [];\n  var tracks = findEbml(bytes, [EBML_TAGS.Segment, EBML_TAGS.Tracks, EBML_TAGS.Track]);\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Tracks, EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    return decodedTracks;\n  }\n\n  tracks.forEach(function (track) {\n    var trackType = findEbml(track, EBML_TAGS.TrackType)[0];\n\n    if (!trackType || !trackType.length) {\n      return;\n    } // 1 is video, 2 is audio, 17 is subtitle\n    // other values are unimportant in this context\n\n\n    if (trackType[0] === 1) {\n      trackType = 'video';\n    } else if (trackType[0] === 2) {\n      trackType = 'audio';\n    } else if (trackType[0] === 17) {\n      trackType = 'subtitle';\n    } else {\n      return;\n    } // todo parse language\n\n\n    var decodedTrack = {\n      rawCodec: bytesToString(findEbml(track, [EBML_TAGS.CodecID])[0]),\n      type: trackType,\n      codecPrivate: findEbml(track, [EBML_TAGS.CodecPrivate])[0],\n      number: bytesToNumber(findEbml(track, [EBML_TAGS.TrackNumber])[0]),\n      defaultDuration: bytesToNumber(findEbml(track, [EBML_TAGS.DefaultDuration])[0]),\n      default: findEbml(track, [EBML_TAGS.FlagDefault])[0],\n      rawData: track\n    };\n    var codec = '';\n\n    if (/V_MPEG4\\/ISO\\/AVC/.test(decodedTrack.rawCodec)) {\n      codec = \"avc1.\" + getAvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEGH\\/ISO\\/HEVC/.test(decodedTrack.rawCodec)) {\n      codec = \"hev1.\" + getHvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEG4\\/ISO\\/ASP/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4v.20.' + decodedTrack.codecPrivate[4].toString();\n      } else {\n        codec = 'mp4v.20.9';\n      }\n    } else if (/^V_THEORA/.test(decodedTrack.rawCodec)) {\n      codec = 'theora';\n    } else if (/^V_VP8/.test(decodedTrack.rawCodec)) {\n      codec = 'vp8';\n    } else if (/^V_VP9/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        var _parseVp9Private = parseVp9Private(decodedTrack.codecPrivate),\n            profile = _parseVp9Private.profile,\n            level = _parseVp9Private.level,\n            bitDepth = _parseVp9Private.bitDepth,\n            chromaSubsampling = _parseVp9Private.chromaSubsampling;\n\n        codec = 'vp09.';\n        codec += padStart(profile, 2, '0') + \".\";\n        codec += padStart(level, 2, '0') + \".\";\n        codec += padStart(bitDepth, 2, '0') + \".\";\n        codec += \"\" + padStart(chromaSubsampling, 2, '0'); // Video -> Colour -> Ebml name\n\n        var matrixCoefficients = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB1]])[0] || [];\n        var videoFullRangeFlag = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB9]])[0] || [];\n        var transferCharacteristics = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBA]])[0] || [];\n        var colourPrimaries = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBB]])[0] || []; // if we find any optional codec parameter specify them all.\n\n        if (matrixCoefficients.length || videoFullRangeFlag.length || transferCharacteristics.length || colourPrimaries.length) {\n          codec += \".\" + padStart(colourPrimaries[0], 2, '0');\n          codec += \".\" + padStart(transferCharacteristics[0], 2, '0');\n          codec += \".\" + padStart(matrixCoefficients[0], 2, '0');\n          codec += \".\" + padStart(videoFullRangeFlag[0], 2, '0');\n        }\n      } else {\n        codec = 'vp9';\n      }\n    } else if (/^V_AV1/.test(decodedTrack.rawCodec)) {\n      codec = \"av01.\" + getAv1Codec(decodedTrack.codecPrivate);\n    } else if (/A_ALAC/.test(decodedTrack.rawCodec)) {\n      codec = 'alac';\n    } else if (/A_MPEG\\/L2/.test(decodedTrack.rawCodec)) {\n      codec = 'mp2';\n    } else if (/A_MPEG\\/L3/.test(decodedTrack.rawCodec)) {\n      codec = 'mp3';\n    } else if (/^A_AAC/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4a.40.' + (decodedTrack.codecPrivate[0] >>> 3).toString();\n      } else {\n        codec = 'mp4a.40.2';\n      }\n    } else if (/^A_AC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ac-3';\n    } else if (/^A_PCM/.test(decodedTrack.rawCodec)) {\n      codec = 'pcm';\n    } else if (/^A_MS\\/ACM/.test(decodedTrack.rawCodec)) {\n      codec = 'speex';\n    } else if (/^A_EAC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ec-3';\n    } else if (/^A_VORBIS/.test(decodedTrack.rawCodec)) {\n      codec = 'vorbis';\n    } else if (/^A_FLAC/.test(decodedTrack.rawCodec)) {\n      codec = 'flac';\n    } else if (/^A_OPUS/.test(decodedTrack.rawCodec)) {\n      codec = 'opus';\n    }\n\n    decodedTrack.codec = codec;\n    decodedTracks.push(decodedTrack);\n  });\n  return decodedTracks.sort(function (a, b) {\n    return a.number - b.number;\n  });\n};\nexport var parseData = function parseData(data, tracks) {\n  var allBlocks = [];\n  var segment = findEbml(data, [EBML_TAGS.Segment])[0];\n  var timestampScale = findEbml(segment, [EBML_TAGS.SegmentInfo, EBML_TAGS.TimestampScale])[0]; // in nanoseconds, defaults to 1ms\n\n  if (timestampScale && timestampScale.length) {\n    timestampScale = bytesToNumber(timestampScale);\n  } else {\n    timestampScale = 1000000;\n  }\n\n  var clusters = findEbml(segment, [EBML_TAGS.Cluster]);\n\n  if (!tracks) {\n    tracks = parseTracks(segment);\n  }\n\n  clusters.forEach(function (cluster, ci) {\n    var simpleBlocks = findEbml(cluster, [EBML_TAGS.SimpleBlock]).map(function (b) {\n      return {\n        type: 'simple',\n        data: b\n      };\n    });\n    var blockGroups = findEbml(cluster, [EBML_TAGS.BlockGroup]).map(function (b) {\n      return {\n        type: 'group',\n        data: b\n      };\n    });\n    var timestamp = findEbml(cluster, [EBML_TAGS.Timestamp])[0] || 0;\n\n    if (timestamp && timestamp.length) {\n      timestamp = bytesToNumber(timestamp);\n    } // get all blocks then sort them into the correct order\n\n\n    var blocks = simpleBlocks.concat(blockGroups).sort(function (a, b) {\n      return a.data.byteOffset - b.data.byteOffset;\n    });\n    blocks.forEach(function (block, bi) {\n      var decoded = decodeBlock(block.data, block.type, timestampScale, timestamp);\n      allBlocks.push(decoded);\n    });\n  });\n  return {\n    tracks: tracks,\n    blocks: allBlocks\n  };\n};","import { bytesMatch, toUint8 } from './byte-helpers.js';\nexport var NAL_TYPE_ONE = toUint8([0x00, 0x00, 0x00, 0x01]);\nexport var NAL_TYPE_TWO = toUint8([0x00, 0x00, 0x01]);\nexport var EMULATION_PREVENTION = toUint8([0x00, 0x00, 0x03]);\n/**\n * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n * Sequence Payload\"\n *\n * @param data {Uint8Array} the bytes of a RBSP from a NAL\n * unit\n * @return {Uint8Array} the RBSP without any Emulation\n * Prevention Bytes\n */\n\nexport var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(bytes) {\n  var positions = [];\n  var i = 1; // Find all `Emulation Prevention Bytes`\n\n  while (i < bytes.length - 2) {\n    if (bytesMatch(bytes.subarray(i, i + 3), EMULATION_PREVENTION)) {\n      positions.push(i + 2);\n      i++;\n    }\n\n    i++;\n  } // If no Emulation Prevention Bytes were found just return the original\n  // array\n\n\n  if (positions.length === 0) {\n    return bytes;\n  } // Create a new array to hold the NAL unit data\n\n\n  var newLength = bytes.length - positions.length;\n  var newData = new Uint8Array(newLength);\n  var sourceIndex = 0;\n\n  for (i = 0; i < newLength; sourceIndex++, i++) {\n    if (sourceIndex === positions[0]) {\n      // Skip this byte\n      sourceIndex++; // Remove this position index\n\n      positions.shift();\n    }\n\n    newData[i] = bytes[sourceIndex];\n  }\n\n  return newData;\n};\nexport var findNal = function findNal(bytes, dataType, types, nalLimit) {\n  if (nalLimit === void 0) {\n    nalLimit = Infinity;\n  }\n\n  bytes = toUint8(bytes);\n  types = [].concat(types);\n  var i = 0;\n  var nalStart;\n  var nalsFound = 0; // keep searching until:\n  // we reach the end of bytes\n  // we reach the maximum number of nals they want to seach\n  // NOTE: that we disregard nalLimit when we have found the start\n  // of the nal we want so that we can find the end of the nal we want.\n\n  while (i < bytes.length && (nalsFound < nalLimit || nalStart)) {\n    var nalOffset = void 0;\n\n    if (bytesMatch(bytes.subarray(i), NAL_TYPE_ONE)) {\n      nalOffset = 4;\n    } else if (bytesMatch(bytes.subarray(i), NAL_TYPE_TWO)) {\n      nalOffset = 3;\n    } // we are unsynced,\n    // find the next nal unit\n\n\n    if (!nalOffset) {\n      i++;\n      continue;\n    }\n\n    nalsFound++;\n\n    if (nalStart) {\n      return discardEmulationPreventionBytes(bytes.subarray(nalStart, i));\n    }\n\n    var nalType = void 0;\n\n    if (dataType === 'h264') {\n      nalType = bytes[i + nalOffset] & 0x1f;\n    } else if (dataType === 'h265') {\n      nalType = bytes[i + nalOffset] >> 1 & 0x3f;\n    }\n\n    if (types.indexOf(nalType) !== -1) {\n      nalStart = i + nalOffset;\n    } // nal header is 1 length for h264, and 2 for h265\n\n\n    i += nalOffset + (dataType === 'h264' ? 1 : 2);\n  }\n\n  return bytes.subarray(0, 0);\n};\nexport var findH264Nal = function findH264Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h264', type, nalLimit);\n};\nexport var findH265Nal = function findH265Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h265', type, nalLimit);\n};","import { toUint8, bytesMatch } from './byte-helpers.js';\nimport { findBox } from './mp4-helpers.js';\nimport { findEbml, EBML_TAGS } from './ebml-helpers.js';\nimport { getId3Offset } from './id3-helpers.js';\nimport { findH264Nal, findH265Nal } from './nal-helpers.js';\nvar CONSTANTS = {\n  // \"webm\" string literal in hex\n  'webm': toUint8([0x77, 0x65, 0x62, 0x6d]),\n  // \"matroska\" string literal in hex\n  'matroska': toUint8([0x6d, 0x61, 0x74, 0x72, 0x6f, 0x73, 0x6b, 0x61]),\n  // \"fLaC\" string literal in hex\n  'flac': toUint8([0x66, 0x4c, 0x61, 0x43]),\n  // \"OggS\" string literal in hex\n  'ogg': toUint8([0x4f, 0x67, 0x67, 0x53]),\n  // ac-3 sync byte, also works for ec-3 as that is simply a codec\n  // of ac-3\n  'ac3': toUint8([0x0b, 0x77]),\n  // \"RIFF\" string literal in hex used for wav and avi\n  'riff': toUint8([0x52, 0x49, 0x46, 0x46]),\n  // \"AVI\" string literal in hex\n  'avi': toUint8([0x41, 0x56, 0x49]),\n  // \"WAVE\" string literal in hex\n  'wav': toUint8([0x57, 0x41, 0x56, 0x45]),\n  // \"ftyp3g\" string literal in hex\n  '3gp': toUint8([0x66, 0x74, 0x79, 0x70, 0x33, 0x67]),\n  // \"ftyp\" string literal in hex\n  'mp4': toUint8([0x66, 0x74, 0x79, 0x70]),\n  // \"styp\" string literal in hex\n  'fmp4': toUint8([0x73, 0x74, 0x79, 0x70]),\n  // \"ftypqt\" string literal in hex\n  'mov': toUint8([0x66, 0x74, 0x79, 0x70, 0x71, 0x74]),\n  // moov string literal in hex\n  'moov': toUint8([0x6D, 0x6F, 0x6F, 0x76]),\n  // moof string literal in hex\n  'moof': toUint8([0x6D, 0x6F, 0x6F, 0x66])\n};\nvar _isLikely = {\n  aac: function aac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x10], {\n      offset: offset,\n      mask: [0xFF, 0x16]\n    });\n  },\n  mp3: function mp3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x02], {\n      offset: offset,\n      mask: [0xFF, 0x06]\n    });\n  },\n  webm: function webm(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is webm\n\n    return bytesMatch(docType, CONSTANTS.webm);\n  },\n  mkv: function mkv(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is matroska\n\n    return bytesMatch(docType, CONSTANTS.matroska);\n  },\n  mp4: function mp4(bytes) {\n    // if this file is another base media file format, it is not mp4\n    if (_isLikely['3gp'](bytes) || _isLikely.mov(bytes)) {\n      return false;\n    } // if this file starts with a ftyp or styp box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.mp4, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.fmp4, {\n      offset: 4\n    })) {\n      return true;\n    } // if this file starts with a moof/moov box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.moof, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.moov, {\n      offset: 4\n    })) {\n      return true;\n    }\n  },\n  mov: function mov(bytes) {\n    return bytesMatch(bytes, CONSTANTS.mov, {\n      offset: 4\n    });\n  },\n  '3gp': function gp(bytes) {\n    return bytesMatch(bytes, CONSTANTS['3gp'], {\n      offset: 4\n    });\n  },\n  ac3: function ac3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.ac3, {\n      offset: offset\n    });\n  },\n  ts: function ts(bytes) {\n    if (bytes.length < 189 && bytes.length >= 1) {\n      return bytes[0] === 0x47;\n    }\n\n    var i = 0; // check the first 376 bytes for two matching sync bytes\n\n    while (i + 188 < bytes.length && i < 188) {\n      if (bytes[i] === 0x47 && bytes[i + 188] === 0x47) {\n        return true;\n      }\n\n      i += 1;\n    }\n\n    return false;\n  },\n  flac: function flac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.flac, {\n      offset: offset\n    });\n  },\n  ogg: function ogg(bytes) {\n    return bytesMatch(bytes, CONSTANTS.ogg);\n  },\n  avi: function avi(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.avi, {\n      offset: 8\n    });\n  },\n  wav: function wav(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.wav, {\n      offset: 8\n    });\n  },\n  'h264': function h264(bytes) {\n    // find seq_parameter_set_rbsp\n    return findH264Nal(bytes, 7, 3).length;\n  },\n  'h265': function h265(bytes) {\n    // find video_parameter_set_rbsp or seq_parameter_set_rbsp\n    return findH265Nal(bytes, [32, 33], 3).length;\n  }\n}; // get all the isLikely functions\n// but make sure 'ts' is above h264 and h265\n// but below everything else as it is the least specific\n\nvar isLikelyTypes = Object.keys(_isLikely) // remove ts, h264, h265\n.filter(function (t) {\n  return t !== 'ts' && t !== 'h264' && t !== 'h265';\n}) // add it back to the bottom\n.concat(['ts', 'h264', 'h265']); // make sure we are dealing with uint8 data.\n\nisLikelyTypes.forEach(function (type) {\n  var isLikelyFn = _isLikely[type];\n\n  _isLikely[type] = function (bytes) {\n    return isLikelyFn(toUint8(bytes));\n  };\n}); // export after wrapping\n\nexport var isLikely = _isLikely; // A useful list of file signatures can be found here\n// https://en.wikipedia.org/wiki/List_of_file_signatures\n\nexport var detectContainerForBytes = function detectContainerForBytes(bytes) {\n  bytes = toUint8(bytes);\n\n  for (var i = 0; i < isLikelyTypes.length; i++) {\n    var type = isLikelyTypes[i];\n\n    if (isLikely[type](bytes)) {\n      return type;\n    }\n  }\n\n  return '';\n}; // fmp4 is not a container\n\nexport var isLikelyFmp4MediaSegment = function isLikelyFmp4MediaSegment(bytes) {\n  return findBox(bytes, ['moof']).length > 0;\n};","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar setToStringTag = require('../internals/set-to-string-tag');\n\n$({ global: true }, { Reflect: {} });\n\n// Reflect[@@toStringTag] property\n// https://tc39.es/ecma262/#sec-reflect-@@tostringtag\nsetToStringTag(global.Reflect, 'Reflect', true);\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && (value >= 0 && value <= 100);\n}\n\n// VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function() {\n        return _width;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function() {\n        return _lines;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorX;\n      },\n      set: function(value) {\n        if(!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorX;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function() {\n        return _scroll;\n      },\n      set: function(value) {\n        var setting = findScrollSetting(value);\n        // Have to check for false as an empty string is a legal value.\n        if (setting === false) {\n          console.warn(\"Scroll: an invalid or illegal string was specified.\");\n        } else {\n          _scroll = setting;\n        }\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;\n","import window from 'global/window';\n\nvar atob = function atob(s) {\n  return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');\n};\n\nexport default function decodeB64ToUint8Array(b64Text) {\n  var decodedString = atob(b64Text);\n  var array = new Uint8Array(decodedString.length);\n\n  for (var i = 0; i < decodedString.length; i++) {\n    array[i] = decodedString.charCodeAt(i);\n  }\n\n  return array;\n}"],"sourceRoot":""}