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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};","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 * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var codecsFromDefault = function codecsFromDefault(master, audioGroupId) {\n  if (!master.mediaGroups.AUDIO || !audioGroupId) {\n    return null;\n  }\n\n  var audioGroup = master.mediaGroups.AUDIO[audioGroupId];\n\n  if (!audioGroup) {\n    return null;\n  }\n\n  for (var name in audioGroup) {\n    var audioType = audioGroup[name];\n\n    if (audioType.default && audioType.playlists) {\n      // codec should be the same for all playlists within the audio type\n      return parseCodecs(audioType.playlists[0].attributes.CODECS);\n    }\n  }\n\n  return null;\n};\nexport var isVideoCodec = function isVideoCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.video.test(codec.trim().toLowerCase());\n};\nexport var isAudioCodec = function isAudioCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.audio.test(codec.trim().toLowerCase());\n};\nexport var 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';","import { padStart, toHexString, toBinaryString } from './byte-helpers.js'; // https://aomediacodec.github.io/av1-isobmff/#av1codecconfigurationbox-syntax\n// https://developer.mozilla.org/en-US/docs/Web/Media/Formats/codecs_parameter#AV1\n\nexport var getAv1Codec = function getAv1Codec(bytes) {\n  var codec = '';\n  var profile = bytes[1] >>> 3;\n  var level = bytes[1] & 0x1F;\n  var tier = bytes[2] >>> 7;\n  var highBitDepth = (bytes[2] & 0x40) >> 6;\n  var twelveBit = (bytes[2] & 0x20) >> 5;\n  var monochrome = (bytes[2] & 0x10) >> 4;\n  var chromaSubsamplingX = (bytes[2] & 0x08) >> 3;\n  var chromaSubsamplingY = (bytes[2] & 0x04) >> 2;\n  var chromaSamplePosition = bytes[2] & 0x03;\n  codec += profile + \".\" + padStart(level, 2, '0');\n\n  if (tier === 0) {\n    codec += 'M';\n  } else if (tier === 1) {\n    codec += 'H';\n  }\n\n  var bitDepth;\n\n  if (profile === 2 && highBitDepth) {\n    bitDepth = twelveBit ? 12 : 10;\n  } else {\n    bitDepth = highBitDepth ? 10 : 8;\n  }\n\n  codec += \".\" + padStart(bitDepth, 2, '0'); // TODO: can we parse color range??\n\n  codec += \".\" + monochrome;\n  codec += \".\" + chromaSubsamplingX + chromaSubsamplingY + chromaSamplePosition;\n  return codec;\n};\nexport var getAvcCodec = function getAvcCodec(bytes) {\n  var profileId = toHexString(bytes[1]);\n  var constraintFlags = toHexString(bytes[2] & 0xFC);\n  var levelId = toHexString(bytes[3]);\n  return \"\" + profileId + constraintFlags + levelId;\n};\nexport var getHvcCodec = function getHvcCodec(bytes) {\n  var codec = '';\n  var profileSpace = bytes[1] >> 6;\n  var profileId = bytes[1] & 0x1F;\n  var tierFlag = (bytes[1] & 0x20) >> 5;\n  var profileCompat = bytes.subarray(2, 6);\n  var constraintIds = bytes.subarray(6, 12);\n  var levelId = bytes[12];\n\n  if (profileSpace === 1) {\n    codec += 'A';\n  } else if (profileSpace === 2) {\n    codec += 'B';\n  } else if (profileSpace === 3) {\n    codec += 'C';\n  }\n\n  codec += profileId + \".\"; // ffmpeg does this in big endian\n\n  var profileCompatVal = parseInt(toBinaryString(profileCompat).split('').reverse().join(''), 2); // apple does this in little endian...\n\n  if (profileCompatVal > 255) {\n    profileCompatVal = parseInt(toBinaryString(profileCompat), 2);\n  }\n\n  codec += profileCompatVal.toString(16) + \".\";\n\n  if (tierFlag === 0) {\n    codec += 'L';\n  } else {\n    codec += 'H';\n  }\n\n  codec += levelId;\n  var constraints = '';\n\n  for (var i = 0; i < constraintIds.length; i++) {\n    var v = constraintIds[i];\n\n    if (v) {\n      if (constraints) {\n        constraints += '.';\n      }\n\n      constraints += v.toString(16);\n    }\n  }\n\n  if (constraints) {\n    codec += \".\" + constraints;\n  }\n\n  return codec;\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 { 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};","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};","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}","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};","/**\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};","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};","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;","/**\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 };","\"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;","\"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() {}"],"sourceRoot":""}