mirror of https://bitbucket.org/ausocean/av.git
mjpeg-player: reduce and simplify hlsjs code
hls.js and stream-controller were both very large ariginally so as to make things simpler, they have been reduced in size and complexity and now just perform the functionality that we need.
This commit is contained in:
Trek H
parent
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@ -1,674 +1,50 @@
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import * as URLToolkit from 'url-toolkit';
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/*
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AUTHOR
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Trek Hopton <trek@ausocean.org>
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import {
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ErrorTypes,
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ErrorDetails
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} from './errors';
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LICENSE
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This file is Copyright (C) 2020 the Australian Ocean Lab (AusOcean)
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import PlaylistLoader from './loader/playlist-loader';
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import FragmentLoader from './loader/fragment-loader';
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import KeyLoader from './loader/key-loader';
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It is free software: you can redistribute it and/or modify them
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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import { FragmentTracker } from './controller/fragment-tracker';
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import StreamController from './controller/stream-controller';
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import LevelController from './controller/level-controller';
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import ID3TrackController from './controller/id3-track-controller';
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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import { isSupported } from './is-supported';
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import { logger, enableLogs } from './utils/logger';
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import { hlsDefaultConfig, HlsConfig } from './config';
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You should have received a copy of the GNU General Public License in gpl.txt.
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If not, see http://www.gnu.org/licenses.
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import HlsEvents from './events';
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For hls.js Copyright notice and license, see LICENSE file.
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*/
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import { Observer } from './observer';
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import URLToolkit from '../url-toolkit/url-toolkit.js';
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import HlsEvents from './events.js';
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import PlaylistLoader from './loader/playlist-loader.js';
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import FragmentLoader from './loader/fragment-loader.js';
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import StreamController from './controller/stream-controller.js';
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import { hlsDefaultConfig } from './config.js';
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import { Observer } from './observer.js';
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/**
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* @module Hls
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* @class
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* @constructor
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*/
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export default class Hls extends Observer {
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public static defaultConfig?: HlsConfig;
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public config: HlsConfig;
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private _autoLevelCapping: number;
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private abrController: any;
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private capLevelController: any;
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private levelController: any;
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private streamController: any;
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private networkControllers: any[];
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private audioTrackController: any;
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private subtitleTrackController: any;
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private emeController: any;
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private coreComponents: any[];
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private media: HTMLMediaElement | null = null;
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private url: string | null = null;
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/**
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* @type {string}
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*/
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static get version (): string {
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return __VERSION__;
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}
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/**
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* @type {boolean}
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*/
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static isSupported (): boolean {
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return isSupported();
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}
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/**
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* @type {HlsEvents}
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*/
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static get Events () {
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return HlsEvents;
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}
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/**
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* @type {HlsErrorTypes}
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*/
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static get ErrorTypes () {
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return ErrorTypes;
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}
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/**
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* @type {HlsErrorDetails}
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*/
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static get ErrorDetails () {
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return ErrorDetails;
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}
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/**
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* @type {HlsConfig}
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*/
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static get DefaultConfig (): HlsConfig {
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if (!Hls.defaultConfig) {
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return hlsDefaultConfig;
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}
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return Hls.defaultConfig;
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}
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/**
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* @type {HlsConfig}
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*/
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static set DefaultConfig (defaultConfig: HlsConfig) {
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Hls.defaultConfig = defaultConfig;
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}
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/**
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* Creates an instance of an HLS client that can attach to exactly one `HTMLMediaElement`.
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*
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* @constructs Hls
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* @param {HlsConfig} config
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*/
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constructor (userConfig: Partial<HlsConfig> = {}) {
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class Hls extends Observer {
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constructor() {
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super();
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this.pLoader = new PlaylistLoader(this);
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this.streamController = new StreamController(this);
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this.fragmentLoader = new FragmentLoader(this);
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const defaultConfig = Hls.DefaultConfig;
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if ((userConfig.liveSyncDurationCount || userConfig.liveMaxLatencyDurationCount) && (userConfig.liveSyncDuration || userConfig.liveMaxLatencyDuration)) {
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throw new Error('Illegal hls.js config: don\'t mix up liveSyncDurationCount/liveMaxLatencyDurationCount and liveSyncDuration/liveMaxLatencyDuration');
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}
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// Shallow clone
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this.config = {
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...defaultConfig,
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...userConfig
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};
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const { config } = this;
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if (config.liveMaxLatencyDurationCount !== void 0 && config.liveMaxLatencyDurationCount <= config.liveSyncDurationCount) {
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throw new Error('Illegal hls.js config: "liveMaxLatencyDurationCount" must be gt "liveSyncDurationCount"');
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}
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if (config.liveMaxLatencyDuration !== void 0 && (config.liveSyncDuration === void 0 || config.liveMaxLatencyDuration <= config.liveSyncDuration)) {
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throw new Error('Illegal hls.js config: "liveMaxLatencyDuration" must be gt "liveSyncDuration"');
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}
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enableLogs(config.debug);
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this._autoLevelCapping = -1;
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// core controllers and network loaders
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/**
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* @member {AbrController} abrController
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*/
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const abrController = this.abrController = new config.abrController(this); // eslint-disable-line new-cap
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const bufferController = new config.bufferController(this); // eslint-disable-line new-cap
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const capLevelController = this.capLevelController = new config.capLevelController(this); // eslint-disable-line new-cap
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const fpsController = new config.fpsController(this); // eslint-disable-line new-cap
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const playListLoader = new PlaylistLoader(this);
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const fragmentLoader = new FragmentLoader(this);
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const keyLoader = new KeyLoader(this);
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const id3TrackController = new ID3TrackController(this);
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// network controllers
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/**
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* @member {LevelController} levelController
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*/
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const levelController = this.levelController = new LevelController(this);
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// FIXME: FragmentTracker must be defined before StreamController because the order of event handling is important
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const fragmentTracker = new FragmentTracker(this);
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/**
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* @member {StreamController} streamController
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*/
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const streamController = this.streamController = new StreamController(this, fragmentTracker);
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let networkControllers = [levelController, streamController];
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// optional audio stream controller
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/**
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* @var {ICoreComponent | Controller}
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*/
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let Controller = config.audioStreamController;
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if (Controller) {
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networkControllers.push(new Controller(this, fragmentTracker));
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}
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/**
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* @member {INetworkController[]} networkControllers
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*/
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this.networkControllers = networkControllers;
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/**
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* @var {ICoreComponent[]}
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*/
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const coreComponents = [
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playListLoader,
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fragmentLoader,
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keyLoader,
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abrController,
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bufferController,
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capLevelController,
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fpsController,
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id3TrackController,
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fragmentTracker
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];
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// optional audio track and subtitle controller
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Controller = config.audioTrackController;
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if (Controller) {
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const audioTrackController = new Controller(this);
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/**
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* @member {AudioTrackController} audioTrackController
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*/
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this.audioTrackController = audioTrackController;
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coreComponents.push(audioTrackController);
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}
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Controller = config.subtitleTrackController;
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if (Controller) {
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const subtitleTrackController = new Controller(this);
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/**
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* @member {SubtitleTrackController} subtitleTrackController
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*/
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this.subtitleTrackController = subtitleTrackController;
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networkControllers.push(subtitleTrackController);
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}
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Controller = config.emeController;
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if (Controller) {
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const emeController = new Controller(this);
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/**
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* @member {EMEController} emeController
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*/
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this.emeController = emeController;
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coreComponents.push(emeController);
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}
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// optional subtitle controllers
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Controller = config.subtitleStreamController;
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if (Controller) {
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networkControllers.push(new Controller(this, fragmentTracker));
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}
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Controller = config.timelineController;
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if (Controller) {
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coreComponents.push(new Controller(this));
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}
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/**
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* @member {ICoreComponent[]}
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*/
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this.coreComponents = coreComponents;
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this.config = hlsDefaultConfig;
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}
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/**
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* Dispose of the instance
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*/
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destroy () {
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logger.log('destroy');
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this.trigger(HlsEvents.DESTROYING);
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this.detachMedia();
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this.coreComponents.concat(this.networkControllers).forEach(component => {
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component.destroy();
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});
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this.url = null;
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this.removeAllListeners();
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this._autoLevelCapping = -1;
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}
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/**
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* Attach a media element
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* @param {HTMLMediaElement} media
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*/
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attachMedia (media: HTMLMediaElement) {
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logger.log('attachMedia');
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this.media = media;
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this.trigger(HlsEvents.MEDIA_ATTACHING, { media: media });
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}
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/**
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* Detach from the media
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*/
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detachMedia () {
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logger.log('detachMedia');
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this.trigger(HlsEvents.MEDIA_DETACHING);
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this.media = null;
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}
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/**
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* Set the source URL. Can be relative or absolute.
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* @param {string} url
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*/
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loadSource (url: string) {
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// url is the source URL. Can be relative or absolute.
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loadSource(url, callback) {
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this.loadSuccess = callback;
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url = URLToolkit.buildAbsoluteURL(window.location.href, url, { alwaysNormalize: true });
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logger.log(`loadSource:${url}`);
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this.url = url;
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// when attaching to a source URL, trigger a playlist load
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this.trigger(HlsEvents.MANIFEST_LOADING, { url: url });
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}
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/**
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* Start loading data from the stream source.
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* Depending on default config, client starts loading automatically when a source is set.
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*
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* @param {number} startPosition Set the start position to stream from
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* @default -1 None (from earliest point)
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*/
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startLoad (startPosition: number = -1) {
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logger.log(`startLoad(${startPosition})`);
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this.networkControllers.forEach(controller => {
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controller.startLoad(startPosition);
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});
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}
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/**
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* Stop loading of any stream data.
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*/
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stopLoad () {
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logger.log('stopLoad');
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this.networkControllers.forEach(controller => {
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controller.stopLoad();
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});
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}
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/**
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* Swap through possible audio codecs in the stream (for example to switch from stereo to 5.1)
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*/
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swapAudioCodec () {
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logger.log('swapAudioCodec');
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this.streamController.swapAudioCodec();
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}
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/**
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* When the media-element fails, this allows to detach and then re-attach it
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* as one call (convenience method).
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*
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* Automatic recovery of media-errors by this process is configurable.
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*/
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recoverMediaError () {
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logger.log('recoverMediaError');
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let media = this.media;
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this.detachMedia();
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if (media) {
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this.attachMedia(media);
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}
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}
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/**
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* @type {QualityLevel[]}
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*/
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// todo(typescript-levelController)
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get levels (): any[] {
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return this.levelController.levels;
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}
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/**
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* Index of quality level currently played
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* @type {number}
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*/
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get currentLevel (): number {
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return this.streamController.currentLevel;
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}
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/**
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* Set quality level index immediately .
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* This will flush the current buffer to replace the quality asap.
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* That means playback will interrupt at least shortly to re-buffer and re-sync eventually.
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* @type {number} -1 for automatic level selection
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*/
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set currentLevel (newLevel: number) {
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logger.log(`set currentLevel:${newLevel}`);
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this.loadLevel = newLevel;
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this.streamController.immediateLevelSwitch();
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}
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/**
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* Index of next quality level loaded as scheduled by stream controller.
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* @type {number}
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*/
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get nextLevel (): number {
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return this.streamController.nextLevel;
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}
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/**
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* Set quality level index for next loaded data.
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* This will switch the video quality asap, without interrupting playback.
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* May abort current loading of data, and flush parts of buffer (outside currently played fragment region).
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* @type {number} -1 for automatic level selection
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*/
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set nextLevel (newLevel: number) {
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logger.log(`set nextLevel:${newLevel}`);
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this.levelController.manualLevel = newLevel;
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this.streamController.nextLevelSwitch();
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}
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/**
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* Return the quality level of the currently or last (of none is loaded currently) segment
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* @type {number}
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*/
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get loadLevel (): number {
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return this.levelController.level;
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}
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/**
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* Set quality level index for next loaded data in a conservative way.
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* This will switch the quality without flushing, but interrupt current loading.
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* Thus the moment when the quality switch will appear in effect will only be after the already existing buffer.
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* @type {number} newLevel -1 for automatic level selection
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*/
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set loadLevel (newLevel: number) {
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logger.log(`set loadLevel:${newLevel}`);
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this.levelController.manualLevel = newLevel;
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}
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/**
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* get next quality level loaded
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* @type {number}
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*/
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get nextLoadLevel (): number {
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return this.levelController.nextLoadLevel;
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}
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/**
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* Set quality level of next loaded segment in a fully "non-destructive" way.
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* Same as `loadLevel` but will wait for next switch (until current loading is done).
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* @type {number} level
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*/
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set nextLoadLevel (level: number) {
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this.levelController.nextLoadLevel = level;
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}
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/**
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* Return "first level": like a default level, if not set,
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* falls back to index of first level referenced in manifest
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* @type {number}
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*/
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get firstLevel (): number {
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return Math.max(this.levelController.firstLevel, this.minAutoLevel);
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}
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/**
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* Sets "first-level", see getter.
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* @type {number}
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*/
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set firstLevel (newLevel: number) {
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logger.log(`set firstLevel:${newLevel}`);
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this.levelController.firstLevel = newLevel;
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}
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/**
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* Return start level (level of first fragment that will be played back)
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* if not overrided by user, first level appearing in manifest will be used as start level
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* if -1 : automatic start level selection, playback will start from level matching download bandwidth
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* (determined from download of first segment)
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* @type {number}
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*/
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get startLevel (): number {
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return this.levelController.startLevel;
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}
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/**
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* set start level (level of first fragment that will be played back)
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* if not overrided by user, first level appearing in manifest will be used as start level
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* if -1 : automatic start level selection, playback will start from level matching download bandwidth
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* (determined from download of first segment)
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* @type {number} newLevel
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*/
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set startLevel (newLevel: number) {
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logger.log(`set startLevel:${newLevel}`);
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// if not in automatic start level detection, ensure startLevel is greater than minAutoLevel
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if (newLevel !== -1) {
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newLevel = Math.max(newLevel, this.minAutoLevel);
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}
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this.levelController.startLevel = newLevel;
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}
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/**
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* set dynamically set capLevelToPlayerSize against (`CapLevelController`)
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*
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* @type {boolean}
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*/
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set capLevelToPlayerSize (shouldStartCapping: boolean) {
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const newCapLevelToPlayerSize = !!shouldStartCapping;
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if (newCapLevelToPlayerSize !== this.config.capLevelToPlayerSize) {
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if (newCapLevelToPlayerSize) {
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this.capLevelController.startCapping(); // If capping occurs, nextLevelSwitch will happen based on size.
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} else {
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this.capLevelController.stopCapping();
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this.autoLevelCapping = -1;
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this.streamController.nextLevelSwitch(); // Now we're uncapped, get the next level asap.
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}
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this.config.capLevelToPlayerSize = newCapLevelToPlayerSize;
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}
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}
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/**
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||||
* Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
|
||||
* @type {number}
|
||||
*/
|
||||
get autoLevelCapping (): number {
|
||||
return this._autoLevelCapping;
|
||||
}
|
||||
|
||||
/**
|
||||
* get bandwidth estimate
|
||||
* @type {number}
|
||||
*/
|
||||
get bandwidthEstimate (): number {
|
||||
const bwEstimator = this.abrController._bwEstimator;
|
||||
return bwEstimator ? bwEstimator.getEstimate() : NaN;
|
||||
}
|
||||
|
||||
/**
|
||||
* Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
|
||||
* @type {number}
|
||||
*/
|
||||
set autoLevelCapping (newLevel: number) {
|
||||
logger.log(`set autoLevelCapping:${newLevel}`);
|
||||
this._autoLevelCapping = newLevel;
|
||||
}
|
||||
|
||||
/**
|
||||
* True when automatic level selection enabled
|
||||
* @type {boolean}
|
||||
*/
|
||||
get autoLevelEnabled (): boolean {
|
||||
return (this.levelController.manualLevel === -1);
|
||||
}
|
||||
|
||||
/**
|
||||
* Level set manually (if any)
|
||||
* @type {number}
|
||||
*/
|
||||
get manualLevel (): number {
|
||||
return this.levelController.manualLevel;
|
||||
}
|
||||
|
||||
/**
|
||||
* min level selectable in auto mode according to config.minAutoBitrate
|
||||
* @type {number}
|
||||
*/
|
||||
get minAutoLevel (): number {
|
||||
const { levels, config: { minAutoBitrate } } = this;
|
||||
const len = levels ? levels.length : 0;
|
||||
|
||||
for (let i = 0; i < len; i++) {
|
||||
const levelNextBitrate = levels[i].realBitrate
|
||||
? Math.max(levels[i].realBitrate, levels[i].bitrate)
|
||||
: levels[i].bitrate;
|
||||
|
||||
if (levelNextBitrate > minAutoBitrate) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* max level selectable in auto mode according to autoLevelCapping
|
||||
* @type {number}
|
||||
*/
|
||||
get maxAutoLevel (): number {
|
||||
const { levels, autoLevelCapping } = this;
|
||||
|
||||
let maxAutoLevel;
|
||||
if (autoLevelCapping === -1 && levels && levels.length) {
|
||||
maxAutoLevel = levels.length - 1;
|
||||
} else {
|
||||
maxAutoLevel = autoLevelCapping;
|
||||
}
|
||||
|
||||
return maxAutoLevel;
|
||||
}
|
||||
|
||||
/**
|
||||
* next automatically selected quality level
|
||||
* @type {number}
|
||||
*/
|
||||
get nextAutoLevel (): number {
|
||||
// ensure next auto level is between min and max auto level
|
||||
return Math.min(Math.max(this.abrController.nextAutoLevel, this.minAutoLevel), this.maxAutoLevel);
|
||||
}
|
||||
|
||||
/**
|
||||
* this setter is used to force next auto level.
|
||||
* this is useful to force a switch down in auto mode:
|
||||
* in case of load error on level N, hls.js can set nextAutoLevel to N-1 for example)
|
||||
* forced value is valid for one fragment. upon succesful frag loading at forced level,
|
||||
* this value will be resetted to -1 by ABR controller.
|
||||
* @type {number}
|
||||
*/
|
||||
set nextAutoLevel (nextLevel: number) {
|
||||
this.abrController.nextAutoLevel = Math.max(this.minAutoLevel, nextLevel);
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {AudioTrack[]}
|
||||
*/
|
||||
// todo(typescript-audioTrackController)
|
||||
get audioTracks (): any[] {
|
||||
const audioTrackController = this.audioTrackController;
|
||||
return audioTrackController ? audioTrackController.audioTracks : [];
|
||||
}
|
||||
|
||||
/**
|
||||
* index of the selected audio track (index in audio track lists)
|
||||
* @type {number}
|
||||
*/
|
||||
get audioTrack (): number {
|
||||
const audioTrackController = this.audioTrackController;
|
||||
return audioTrackController ? audioTrackController.audioTrack : -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* selects an audio track, based on its index in audio track lists
|
||||
* @type {number}
|
||||
*/
|
||||
set audioTrack (audioTrackId: number) {
|
||||
const audioTrackController = this.audioTrackController;
|
||||
if (audioTrackController) {
|
||||
audioTrackController.audioTrack = audioTrackId;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {Seconds}
|
||||
*/
|
||||
get liveSyncPosition (): number {
|
||||
return this.streamController.liveSyncPosition;
|
||||
}
|
||||
|
||||
/**
|
||||
* get alternate subtitle tracks list from playlist
|
||||
* @type {SubtitleTrack[]}
|
||||
*/
|
||||
// todo(typescript-subtitleTrackController)
|
||||
get subtitleTracks (): any[] {
|
||||
const subtitleTrackController = this.subtitleTrackController;
|
||||
return subtitleTrackController ? subtitleTrackController.subtitleTracks : [];
|
||||
}
|
||||
|
||||
/**
|
||||
* index of the selected subtitle track (index in subtitle track lists)
|
||||
* @type {number}
|
||||
*/
|
||||
get subtitleTrack (): number {
|
||||
const subtitleTrackController = this.subtitleTrackController;
|
||||
return subtitleTrackController ? subtitleTrackController.subtitleTrack : -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* select an subtitle track, based on its index in subtitle track lists
|
||||
* @type {number}
|
||||
*/
|
||||
set subtitleTrack (subtitleTrackId: number) {
|
||||
const subtitleTrackController = this.subtitleTrackController;
|
||||
if (subtitleTrackController) {
|
||||
subtitleTrackController.subtitleTrack = subtitleTrackId;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {boolean}
|
||||
*/
|
||||
get subtitleDisplay (): boolean {
|
||||
const subtitleTrackController = this.subtitleTrackController;
|
||||
return subtitleTrackController ? subtitleTrackController.subtitleDisplay : false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Enable/disable subtitle display rendering
|
||||
* @type {boolean}
|
||||
*/
|
||||
set subtitleDisplay (value: boolean) {
|
||||
const subtitleTrackController = this.subtitleTrackController;
|
||||
if (subtitleTrackController) {
|
||||
subtitleTrackController.subtitleDisplay = value;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
export default Hls
|
||||
Loading…
Reference in New Issue