nsplayer/dist/cjs/dashplayer-d15c72aa.js

NSPlayer, a player which supports quality list of dash and hls

'use strict';

var global = typeof self !== 'undefined' ? self : globalThis;

var _defineProperty = require('@babel/runtime/helpers/defineProperty');
var common = require('@newstudios/common');
var index = require('./index-773e68b1.js');
var dashjs = require('dashjs');
require('delegates');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var _defineProperty__default = /*#__PURE__*/_interopDefaultLegacy(_defineProperty);

function getBytesLength(request) {
  return request.trace.reduce((a, b) => a + b.b[0], 0);
}

function getTime(request) {
  return request.trace.reduce((a, b) => a + b.d, 0);
}

function caculateBandWidthFor(player, type) {
  const metrics = player.getDashMetrics();
  const requests = metrics.getHttpRequests(type);
  const lastCount = 4;
  const requestWindow = requests.slice(-lastCount * 5).filter(req => {
    return req.type === 'MediaSegment' && req._stream === type && req.trace.length > 1 && req._tfinish.getTime() - req.tresponse.getTime() > 0;
  }).slice(-lastCount);

  if (requestWindow.length === 0) {
    return 0;
  }

  const downloadLengths = requestWindow.map(req => getBytesLength(req) * 8);
  const downloadTimes = requestWindow.map(req => getTime(req) / 1000);
  const size = downloadLengths.reduce((a, b) => a + b, 0);
  const time = downloadTimes.reduce((a, b) => a + b, 0);
  return Math.round(size / time);
}

function caculateBandWidth(player) {
  return caculateBandWidthFor(player, 'video') + caculateBandWidthFor(player, 'audio');
}

class DashPlayer extends index.CorePlayer {
  static setDefaultMediaPlayerFactory(factory) {
    DashPlayer._mediaPlayerFactory = factory;
  }

  constructor(video, source, fastSwitch = true, capLevelToPlayerSize = false) {
    super(video, source);

    _defineProperty__default["default"](this, "_mediaType", 'video');

    _defineProperty__default["default"](this, "_currentLevelIndex", 0);

    _defineProperty__default["default"](this, "_initialized", false);

    this._fastSwitchEnabled = fastSwitch;
    this._dashPlayer = DashPlayer._mediaPlayerFactory.create();

    this._dashPlayer.updateSettings({
      streaming: {
        buffer: {
          fastSwitchEnabled: this._fastSwitchEnabled
        },
        abr: {
          limitBitrateByPortal: capLevelToPlayerSize,
          usePixelRatioInLimitBitrateByPortal: capLevelToPlayerSize
        }
      }
    }); // debug error


    this.debugError();

    this._register(common.toDisposable(() => this._dashPlayer.reset()));
  }

  debugError() {
    const onError = common.Event.fromNodeEventEmitter(this._dashPlayer, dashjs.MediaPlayer.events.ERROR);
    const onPlaybackError = common.Event.fromNodeEventEmitter(this._dashPlayer, dashjs.MediaPlayer.events.PLAYBACK_ERROR);

    this._register(onError(err => console.info(err)));

    this._register(onPlaybackError(err => console.info(err)));
  }

  get levels() {
    return this._initialized ? this._dashPlayer.getBitrateInfoListFor(this._mediaType) : [];
  }

  get currentLevel() {
    return this.levels[this._currentLevelIndex];
  }

  get nextLevel() {
    return this._initialized ? this.levels[this._dashPlayer.getQualityFor(this._mediaType)] : undefined;
  }

  get autoQualityEnabled() {
    var _this$_dashPlayer$get, _this$_dashPlayer$get2;

    const autoSwitchBitrate = (_this$_dashPlayer$get = this._dashPlayer.getSettings().streaming) === null || _this$_dashPlayer$get === void 0 ? void 0 : (_this$_dashPlayer$get2 = _this$_dashPlayer$get.abr) === null || _this$_dashPlayer$get2 === void 0 ? void 0 : _this$_dashPlayer$get2.autoSwitchBitrate;

    if (autoSwitchBitrate) {
      return typeof autoSwitchBitrate[this._mediaType] === 'boolean' ? autoSwitchBitrate[this._mediaType] : true;
    }

    return true;
  }

  levelToQuality(bitrateInfo) {
    const level = {
      bitrate: bitrateInfo.bitrate,
      width: bitrateInfo.width,
      height: bitrateInfo.height,
      type: bitrateInfo.mediaType
    };
    return level;
  }

  findLevelIndexByQualityLevel(playLevel) {
    const levels = this.levels; // bitrate match

    const idx = levels.findIndex(level => level.bitrate === playLevel.bitrate);

    if (idx >= 0) {
      return idx;
    } // short side match


    const shortSide = Math.min(playLevel.width, playLevel.height);
    return levels.findIndex(level => Math.min(level.width, level.height) === shortSide);
  }

  setAutoQualityState(auto) {
    const dashPlayer = this._dashPlayer;
    dashPlayer.updateSettings({
      streaming: {
        buffer: {
          fastSwitchEnabled: this._fastSwitchEnabled
        },
        abr: {
          autoSwitchBitrate: {
            [this._mediaType]: auto
          }
        }
      }
    });
  }

  setNextLevelIndex(index) {
    const dashPlayer = this._dashPlayer;

    if (index >= 0) {
      dashPlayer.setQualityFor(this._mediaType, index);
    }
  }

  onInit(video, source) {
    const dashPlayer = this._dashPlayer;
    dashPlayer.initialize(video, source.src, this.video.autoplay);
    this._initialized = true;
    this.log('onInit', 'initialized');

    const disposables = this._register(new common.DisposableStore());

    const onManifestParsed = common.Event.fromNodeEventEmitter(dashPlayer, dashjs.MediaPlayer.events.STREAM_INITIALIZED);
    const onLevelSwitched = common.Event.filter(common.Event.fromNodeEventEmitter(dashPlayer, dashjs.MediaPlayer.events.QUALITY_CHANGE_RENDERED), evt => evt.mediaType === this._mediaType);
    const onLevelSwitching = common.Event.filter(common.Event.fromNodeEventEmitter(dashPlayer, dashjs.MediaPlayer.events.QUALITY_CHANGE_REQUESTED), evt => evt.mediaType === this._mediaType);
    onManifestParsed(this.updatePlayList, this, disposables);
    onManifestParsed(this.setReady, this, disposables);
    onLevelSwitching(this.updateNextQualityLevel, this, disposables);
    onLevelSwitched(evt => {
      this._currentLevelIndex = evt.newQuality;
      this.updateQualityLevel();
    }, null, disposables);
  }

  setInitialBitrate(bitrate) {
    const dashPlayer = this._dashPlayer;
    dashPlayer.updateSettings({
      streaming: {
        buffer: {
          fastSwitchEnabled: this._fastSwitchEnabled
        },
        abr: {
          initialBitrate: {
            [this._mediaType]: bitrate / 1000
          }
        }
      }
    });
  }

  setCapLevelToPlayerSize(capLevelToPlayerSize) {
    const dashPlayer = this._dashPlayer;
    dashPlayer.updateSettings({
      streaming: {
        abr: {
          limitBitrateByPortal: capLevelToPlayerSize,
          usePixelRatioInLimitBitrateByPortal: capLevelToPlayerSize
        }
      }
    });
  }

  get capLevelToPlayerSize() {
    var _this$_dashPlayer$get3, _this$_dashPlayer$get4, _this$_dashPlayer$get5;

    return (_this$_dashPlayer$get3 = (_this$_dashPlayer$get4 = this._dashPlayer.getSettings().streaming) === null || _this$_dashPlayer$get4 === void 0 ? void 0 : (_this$_dashPlayer$get5 = _this$_dashPlayer$get4.abr) === null || _this$_dashPlayer$get5 === void 0 ? void 0 : _this$_dashPlayer$get5.limitBitrateByPortal) !== null && _this$_dashPlayer$get3 !== void 0 ? _this$_dashPlayer$get3 : false;
  }

  get bandwidthEstimate() {
    return caculateBandWidth(this._dashPlayer);
  }

  get name() {
    return `DASHPlayer (${this._dashPlayer.getVersion()})`;
  }

  get supportAutoQuality() {
    return true;
  }

}

_defineProperty__default["default"](DashPlayer, "_mediaPlayerFactory", dashjs.MediaPlayer());

exports.DashPlayer = DashPlayer;