mirror of https://github.com/Chocobozzz/PeerTube
645 lines
21 KiB
TypeScript
645 lines
21 KiB
TypeScript
// FIXME: something weird with our path definition in tsconfig and typings
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// @ts-ignore
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import * as videojs from 'video.js'
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import * as WebTorrent from 'webtorrent'
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import { renderVideo } from './video-renderer'
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import { LoadedQualityData, PlayerNetworkInfo, VideoJSComponentInterface, WebtorrentPluginOptions } from '../peertube-videojs-typings'
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import { getRtcConfig, timeToInt, videoFileMaxByResolution, videoFileMinByResolution } from '../utils'
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import { PeertubeChunkStore } from './peertube-chunk-store'
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import {
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getAverageBandwidthInStore,
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getStoredMute,
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getStoredVolume,
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getStoredWebTorrentEnabled,
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saveAverageBandwidth
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} from '../peertube-player-local-storage'
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import { VideoFile } from '@shared/models'
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const CacheChunkStore = require('cache-chunk-store')
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type PlayOptions = {
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forcePlay?: boolean,
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seek?: number,
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delay?: number
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}
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const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
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class WebTorrentPlugin extends Plugin {
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private readonly playerElement: HTMLVideoElement
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private readonly autoplay: boolean = false
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private readonly startTime: number = 0
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private readonly savePlayerSrcFunction: Function
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private readonly videoFiles: VideoFile[]
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private readonly videoDuration: number
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private readonly CONSTANTS = {
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INFO_SCHEDULER: 1000, // Don't change this
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AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
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AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
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AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
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AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
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BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
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}
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private readonly webtorrent = new WebTorrent({
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tracker: {
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rtcConfig: getRtcConfig()
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},
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dht: false
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})
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private player: any
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private currentVideoFile: VideoFile
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private torrent: WebTorrent.Torrent
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private renderer: any
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private fakeRenderer: any
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private destroyingFakeRenderer = false
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private autoResolution = true
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private autoResolutionPossible = true
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private isAutoResolutionObservation = false
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private playerRefusedP2P = false
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private torrentInfoInterval: any
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private autoQualityInterval: any
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private addTorrentDelay: any
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private qualityObservationTimer: any
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private runAutoQualitySchedulerTimer: any
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private downloadSpeeds: number[] = []
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constructor (player: videojs.Player, options: WebtorrentPluginOptions) {
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super(player, options)
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this.startTime = timeToInt(options.startTime)
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// Disable auto play on iOS
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this.autoplay = options.autoplay && this.isIOS() === false
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this.playerRefusedP2P = !getStoredWebTorrentEnabled()
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this.videoFiles = options.videoFiles
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this.videoDuration = options.videoDuration
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this.savePlayerSrcFunction = this.player.src
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this.playerElement = options.playerElement
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this.player.ready(() => {
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const playerOptions = this.player.options_
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const volume = getStoredVolume()
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if (volume !== undefined) this.player.volume(volume)
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const muted = playerOptions.muted !== undefined ? playerOptions.muted : getStoredMute()
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if (muted !== undefined) this.player.muted(muted)
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this.player.duration(options.videoDuration)
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this.initializePlayer()
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this.runTorrentInfoScheduler()
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this.player.one('play', () => {
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// Don't run immediately scheduler, wait some seconds the TCP connections are made
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this.runAutoQualitySchedulerTimer = setTimeout(() => this.runAutoQualityScheduler(), this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
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})
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})
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}
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dispose () {
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clearTimeout(this.addTorrentDelay)
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clearTimeout(this.qualityObservationTimer)
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clearTimeout(this.runAutoQualitySchedulerTimer)
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clearInterval(this.torrentInfoInterval)
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clearInterval(this.autoQualityInterval)
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// Don't need to destroy renderer, video player will be destroyed
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this.flushVideoFile(this.currentVideoFile, false)
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this.destroyFakeRenderer()
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}
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getCurrentResolutionId () {
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return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
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}
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updateVideoFile (
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videoFile?: VideoFile,
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options: {
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forcePlay?: boolean,
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seek?: number,
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delay?: number
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} = {},
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done: () => void = () => { /* empty */ }
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) {
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// Automatically choose the adapted video file
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if (videoFile === undefined) {
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const savedAverageBandwidth = getAverageBandwidthInStore()
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videoFile = savedAverageBandwidth
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? this.getAppropriateFile(savedAverageBandwidth)
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: this.pickAverageVideoFile()
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}
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// Don't add the same video file once again
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if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
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return
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}
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// Do not display error to user because we will have multiple fallback
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this.disableErrorDisplay()
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// Hack to "simulate" src link in video.js >= 6
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// Without this, we can't play the video after pausing it
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// https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
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this.player.src = () => true
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const oldPlaybackRate = this.player.playbackRate()
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const previousVideoFile = this.currentVideoFile
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this.currentVideoFile = videoFile
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// Don't try on iOS that does not support MediaSource
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// Or don't use P2P if webtorrent is disabled
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if (this.isIOS() || this.playerRefusedP2P) {
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return this.fallbackToHttp(options, () => {
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this.player.playbackRate(oldPlaybackRate)
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return done()
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})
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}
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this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
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this.player.playbackRate(oldPlaybackRate)
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return done()
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})
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this.changeQuality()
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this.trigger('resolutionChange', { auto: this.autoResolution, resolutionId: this.currentVideoFile.resolution.id })
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}
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updateResolution (resolutionId: number, delay = 0) {
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// Remember player state
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const currentTime = this.player.currentTime()
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const isPaused = this.player.paused()
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// Remove poster to have black background
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this.playerElement.poster = ''
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// Hide bigPlayButton
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if (!isPaused) {
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this.player.bigPlayButton.hide()
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}
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const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
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const options = {
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forcePlay: false,
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delay,
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seek: currentTime + (delay / 1000)
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}
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this.updateVideoFile(newVideoFile, options)
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}
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flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
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if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
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if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
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this.webtorrent.remove(videoFile.magnetUri)
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console.log('Removed ' + videoFile.magnetUri)
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}
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}
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enableAutoResolution () {
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this.autoResolution = true
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this.trigger('resolutionChange', { auto: this.autoResolution, resolutionId: this.getCurrentResolutionId() })
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}
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disableAutoResolution (forbid = false) {
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if (forbid === true) this.autoResolutionPossible = false
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this.autoResolution = false
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this.trigger('autoResolutionChange', { possible: this.autoResolutionPossible })
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this.trigger('resolutionChange', { auto: this.autoResolution, resolutionId: this.getCurrentResolutionId() })
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}
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getTorrent () {
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return this.torrent
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}
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private addTorrent (
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magnetOrTorrentUrl: string,
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previousVideoFile: VideoFile,
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options: PlayOptions,
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done: Function
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) {
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console.log('Adding ' + magnetOrTorrentUrl + '.')
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const oldTorrent = this.torrent
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const torrentOptions = {
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// Don't use arrow function: it breaks webtorrent (that uses `new` keyword)
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store: function (chunkLength: number, storeOpts: any) {
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return new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
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max: 100
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})
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}
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}
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this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
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console.log('Added ' + magnetOrTorrentUrl + '.')
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if (oldTorrent) {
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// Pause the old torrent
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this.stopTorrent(oldTorrent)
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// We use a fake renderer so we download correct pieces of the next file
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if (options.delay) this.renderFileInFakeElement(torrent.files[ 0 ], options.delay)
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}
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// Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
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this.addTorrentDelay = setTimeout(() => {
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// We don't need the fake renderer anymore
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this.destroyFakeRenderer()
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const paused = this.player.paused()
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this.flushVideoFile(previousVideoFile)
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// Update progress bar (just for the UI), do not wait rendering
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if (options.seek) this.player.currentTime(options.seek)
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const renderVideoOptions = { autoplay: false, controls: true }
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renderVideo(torrent.files[ 0 ], this.playerElement, renderVideoOptions, (err, renderer) => {
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this.renderer = renderer
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if (err) return this.fallbackToHttp(options, done)
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return this.tryToPlay(err => {
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if (err) return done(err)
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if (options.seek) this.seek(options.seek)
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if (options.forcePlay === false && paused === true) this.player.pause()
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return done()
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})
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})
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}, options.delay || 0)
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})
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this.torrent.on('error', (err: any) => console.error(err))
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this.torrent.on('warning', (err: any) => {
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// We don't support HTTP tracker but we don't care -> we use the web socket tracker
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if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
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// Users don't care about issues with WebRTC, but developers do so log it in the console
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if (err.message.indexOf('Ice connection failed') !== -1) {
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console.log(err)
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return
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}
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// Magnet hash is not up to date with the torrent file, add directly the torrent file
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if (err.message.indexOf('incorrect info hash') !== -1) {
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console.error('Incorrect info hash detected, falling back to torrent file.')
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const newOptions = { forcePlay: true, seek: options.seek }
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return this.addTorrent(this.torrent[ 'xs' ], previousVideoFile, newOptions, done)
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}
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// Remote instance is down
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if (err.message.indexOf('from xs param') !== -1) {
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this.handleError(err)
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}
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console.warn(err)
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})
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}
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private tryToPlay (done?: (err?: Error) => void) {
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if (!done) done = function () { /* empty */ }
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const playPromise = this.player.play()
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if (playPromise !== undefined) {
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return playPromise.then(done)
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.catch((err: Error) => {
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if (err.message.indexOf('The play() request was interrupted by a call to pause()') !== -1) {
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return
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}
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console.error(err)
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this.player.pause()
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this.player.posterImage.show()
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this.player.removeClass('vjs-has-autoplay')
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this.player.removeClass('vjs-has-big-play-button-clicked')
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return done()
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})
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}
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return done()
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}
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private seek (time: number) {
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this.player.currentTime(time)
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this.player.handleTechSeeked_()
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}
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private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
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if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
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if (this.videoFiles.length === 1) return this.videoFiles[0]
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// Don't change the torrent is the play was ended
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if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
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if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
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// Limit resolution according to player height
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const playerHeight = this.playerElement.offsetHeight
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// We take the first resolution just above the player height
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// Example: player height is 530px, we want the 720p file instead of 480p
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let maxResolution = this.videoFiles[0].resolution.id
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for (let i = this.videoFiles.length - 1; i >= 0; i--) {
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const resolutionId = this.videoFiles[i].resolution.id
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if (resolutionId >= playerHeight) {
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maxResolution = resolutionId
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break
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}
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}
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// Filter videos we can play according to our screen resolution and bandwidth
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const filteredFiles = this.videoFiles
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.filter(f => f.resolution.id <= maxResolution)
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.filter(f => {
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const fileBitrate = (f.size / this.videoDuration)
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let threshold = fileBitrate
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// If this is for a higher resolution or an initial load: add a margin
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if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
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threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
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}
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return averageDownloadSpeed > threshold
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})
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// If the download speed is too bad, return the lowest resolution we have
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if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
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return videoFileMaxByResolution(filteredFiles)
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}
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private getAndSaveActualDownloadSpeed () {
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const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
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const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
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if (lastDownloadSpeeds.length === 0) return -1
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const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
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const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
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// Save the average bandwidth for future use
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saveAverageBandwidth(averageBandwidth)
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return averageBandwidth
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}
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private initializePlayer () {
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this.buildQualities()
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if (this.autoplay === true) {
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this.player.posterImage.hide()
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return this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
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}
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// Proxy first play
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const oldPlay = this.player.play.bind(this.player)
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this.player.play = () => {
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this.player.addClass('vjs-has-big-play-button-clicked')
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this.player.play = oldPlay
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this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
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}
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}
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private runAutoQualityScheduler () {
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this.autoQualityInterval = setInterval(() => {
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// Not initialized or in HTTP fallback
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if (this.torrent === undefined || this.torrent === null) return
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if (this.autoResolution === false) return
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if (this.isAutoResolutionObservation === true) return
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const file = this.getAppropriateFile()
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let changeResolution = false
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let changeResolutionDelay = 0
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// Lower resolution
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if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
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console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
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changeResolution = true
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} else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
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console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
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changeResolution = true
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changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
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}
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if (changeResolution === true) {
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this.updateResolution(file.resolution.id, changeResolutionDelay)
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// Wait some seconds in observation of our new resolution
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this.isAutoResolutionObservation = true
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this.qualityObservationTimer = setTimeout(() => {
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this.isAutoResolutionObservation = false
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}, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
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}
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}, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
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}
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private isPlayerWaiting () {
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return this.player && this.player.hasClass('vjs-waiting')
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}
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private runTorrentInfoScheduler () {
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this.torrentInfoInterval = setInterval(() => {
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// Not initialized yet
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if (this.torrent === undefined) return
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// Http fallback
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if (this.torrent === null) return this.player.trigger('p2pInfo', false)
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// this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
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if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
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return this.player.trigger('p2pInfo', {
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http: {
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downloadSpeed: 0,
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uploadSpeed: 0,
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downloaded: 0,
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uploaded: 0
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},
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p2p: {
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downloadSpeed: this.torrent.downloadSpeed,
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numPeers: this.torrent.numPeers,
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uploadSpeed: this.torrent.uploadSpeed,
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downloaded: this.torrent.downloaded,
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uploaded: this.torrent.uploaded
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}
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} as PlayerNetworkInfo)
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}, this.CONSTANTS.INFO_SCHEDULER)
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}
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private fallbackToHttp (options: PlayOptions, done?: Function) {
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const paused = this.player.paused()
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this.disableAutoResolution(true)
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this.flushVideoFile(this.currentVideoFile, true)
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this.torrent = null
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// Enable error display now this is our last fallback
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this.player.one('error', () => this.enableErrorDisplay())
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const httpUrl = this.currentVideoFile.fileUrl
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this.player.src = this.savePlayerSrcFunction
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this.player.src(httpUrl)
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this.changeQuality()
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// We changed the source, so reinit captions
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this.player.trigger('sourcechange')
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return this.tryToPlay(err => {
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if (err && done) return done(err)
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if (options.seek) this.seek(options.seek)
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if (options.forcePlay === false && paused === true) this.player.pause()
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if (done) return done()
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})
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}
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private handleError (err: Error | string) {
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return this.player.trigger('customError', { err })
|
|
}
|
|
|
|
private enableErrorDisplay () {
|
|
this.player.addClass('vjs-error-display-enabled')
|
|
}
|
|
|
|
private disableErrorDisplay () {
|
|
this.player.removeClass('vjs-error-display-enabled')
|
|
}
|
|
|
|
private isIOS () {
|
|
return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
|
|
}
|
|
|
|
private pickAverageVideoFile () {
|
|
if (this.videoFiles.length === 1) return this.videoFiles[0]
|
|
|
|
return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
|
|
}
|
|
|
|
private stopTorrent (torrent: WebTorrent.Torrent) {
|
|
torrent.pause()
|
|
// Pause does not remove actual peers (in particular the webseed peer)
|
|
torrent.removePeer(torrent[ 'ws' ])
|
|
}
|
|
|
|
private renderFileInFakeElement (file: WebTorrent.TorrentFile, delay: number) {
|
|
this.destroyingFakeRenderer = false
|
|
|
|
const fakeVideoElem = document.createElement('video')
|
|
renderVideo(file, fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
|
|
this.fakeRenderer = renderer
|
|
|
|
// The renderer returns an error when we destroy it, so skip them
|
|
if (this.destroyingFakeRenderer === false && err) {
|
|
console.error('Cannot render new torrent in fake video element.', err)
|
|
}
|
|
|
|
// Load the future file at the correct time (in delay MS - 2 seconds)
|
|
fakeVideoElem.currentTime = this.player.currentTime() + (delay - 2000)
|
|
})
|
|
}
|
|
|
|
private destroyFakeRenderer () {
|
|
if (this.fakeRenderer) {
|
|
this.destroyingFakeRenderer = true
|
|
|
|
if (this.fakeRenderer.destroy) {
|
|
try {
|
|
this.fakeRenderer.destroy()
|
|
} catch (err) {
|
|
console.log('Cannot destroy correctly fake renderer.', err)
|
|
}
|
|
}
|
|
this.fakeRenderer = undefined
|
|
}
|
|
}
|
|
|
|
private buildQualities () {
|
|
const qualityLevelsPayload = []
|
|
|
|
for (const file of this.videoFiles) {
|
|
const representation = {
|
|
id: file.resolution.id,
|
|
label: this.buildQualityLabel(file),
|
|
height: file.resolution.id,
|
|
_enabled: true
|
|
}
|
|
|
|
this.player.qualityLevels().addQualityLevel(representation)
|
|
|
|
qualityLevelsPayload.push({
|
|
id: representation.id,
|
|
label: representation.label,
|
|
selected: false
|
|
})
|
|
}
|
|
|
|
const payload: LoadedQualityData = {
|
|
qualitySwitchCallback: (d: any) => this.qualitySwitchCallback(d),
|
|
qualityData: {
|
|
video: qualityLevelsPayload
|
|
}
|
|
}
|
|
this.player.tech_.trigger('loadedqualitydata', payload)
|
|
}
|
|
|
|
private buildQualityLabel (file: VideoFile) {
|
|
let label = file.resolution.label
|
|
|
|
if (file.fps && file.fps >= 50) {
|
|
label += file.fps
|
|
}
|
|
|
|
return label
|
|
}
|
|
|
|
private qualitySwitchCallback (id: number) {
|
|
if (id === -1) {
|
|
if (this.autoResolutionPossible === true) this.enableAutoResolution()
|
|
return
|
|
}
|
|
|
|
this.disableAutoResolution()
|
|
this.updateResolution(id)
|
|
}
|
|
|
|
private changeQuality () {
|
|
const resolutionId = this.currentVideoFile.resolution.id
|
|
const qualityLevels = this.player.qualityLevels()
|
|
|
|
if (resolutionId === -1) {
|
|
qualityLevels.selectedIndex = -1
|
|
return
|
|
}
|
|
|
|
for (let i = 0; i < qualityLevels; i++) {
|
|
const q = this.player.qualityLevels[i]
|
|
if (q.height === resolutionId) qualityLevels.selectedIndex = i
|
|
}
|
|
}
|
|
}
|
|
|
|
videojs.registerPlugin('webtorrent', WebTorrentPlugin)
|
|
export { WebTorrentPlugin }
|