mirror of https://github.com/Chocobozzz/PeerTube
664 lines
22 KiB
TypeScript
664 lines
22 KiB
TypeScript
import videojs from 'video.js'
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import * as WebTorrent from 'webtorrent'
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import { logger } from '@root-helpers/logger'
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import { isIOS } from '@root-helpers/web-browser'
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import { addQueryParams, timeToInt } from '@shared/core-utils'
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import { VideoFile } from '@shared/models'
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import { getAverageBandwidthInStore, getStoredMute, getStoredVolume, saveAverageBandwidth } from '../../peertube-player-local-storage'
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import { PeerTubeResolution, PlayerNetworkInfo, WebtorrentPluginOptions } from '../../types'
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import { getRtcConfig, videoFileMaxByResolution, videoFileMinByResolution } from '../common'
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import { PeertubeChunkStore } from './peertube-chunk-store'
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import { renderVideo } from './video-renderer'
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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 = videojs.getPlugin('plugin')
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class WebTorrentPlugin extends Plugin {
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readonly videoFiles: VideoFile[]
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private readonly playerElement: HTMLVideoElement
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private readonly autoplay: boolean | string = false
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private readonly startTime: number = 0
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private readonly savePlayerSrcFunction: videojs.Player['src']
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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 buildWebSeedUrls: (file: VideoFile) => string[]
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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 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 requiresAuth: boolean
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private videoFileToken: () => string
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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)
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this.startTime = timeToInt(options.startTime)
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// Custom autoplay handled by webtorrent because we lazy play the video
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this.autoplay = options.autoplay
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this.playerRefusedP2P = options.playerRefusedP2P
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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.requiresAuth = options.requiresAuth
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this.videoFileToken = options.videoFileToken
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this.buildWebSeedUrls = options.buildWebSeedUrls
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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) {
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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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if (!videoFile) {
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throw Error(`Can't update video file since videoFile is undefined.`)
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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.player.peertube().hideFatalError();
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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 as any).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 (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.selectAppropriateResolution(true)
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}
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updateEngineResolution (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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// Hide bigPlayButton
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if (!isPaused) {
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this.player.bigPlayButton.hide()
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}
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// Audio-only (resolutionId === 0) gets special treatment
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if (resolutionId === 0) {
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// Audio-only: show poster, do not auto-hide controls
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this.player.addClass('vjs-playing-audio-only-content')
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this.player.posterImage.show()
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} else {
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// Hide poster to have black background
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this.player.removeClass('vjs-playing-audio-only-content')
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this.player.posterImage.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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this.player.trigger('engineResolutionChange')
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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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logger.info(`Removed ${videoFile.magnetUri}`)
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}
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}
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disableAutoResolution () {
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this.autoResolution = false
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this.autoResolutionPossible = false
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this.player.peertubeResolutions().disableAutoResolution()
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}
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isAutoResolutionPossible () {
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return this.autoResolutionPossible
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}
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getTorrent () {
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return this.torrent
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}
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getCurrentVideoFile () {
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return this.currentVideoFile
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}
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changeQuality (id: number) {
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if (id === -1) {
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if (this.autoResolutionPossible === true) {
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this.autoResolution = true
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this.selectAppropriateResolution(false)
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}
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return
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}
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this.autoResolution = false
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this.updateEngineResolution(id)
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this.selectAppropriateResolution(false)
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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: (err?: Error) => void
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) {
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if (!magnetOrTorrentUrl) return this.fallbackToHttp(options, done)
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logger.info(`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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urlList: this.buildWebSeedUrls(this.currentVideoFile)
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}
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this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
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logger.info(`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) => logger.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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logger.info(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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logger.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 as any)['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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logger.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.includes('The play() request was interrupted by a call to pause()')) {
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return
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}
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logger.warn(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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this.player.removeClass('vjs-playing-audio-only-content')
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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) return undefined
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if (this.videoFiles.length === 1) return this.videoFiles[0]
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const files = this.videoFiles.filter(f => f.resolution.id !== 0)
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if (files.length === 0) return undefined
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// Don't change the torrent if the player 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 = files[0].resolution.id
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for (let i = files.length - 1; i >= 0; i--) {
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const resolutionId = files[i].resolution.id
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if (resolutionId !== 0 && 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 = files.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(files)
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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.videoFiles.length === 0) {
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this.player.addClass('disabled')
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return
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}
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if (this.autoplay !== false) {
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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 as any).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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logger.info(`Downgrading automatically the resolution to: ${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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logger.info(`Upgrading automatically the resolution to: ${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.updateEngineResolution(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?.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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source: 'webtorrent',
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http: {
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downloadSpeed: 0,
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downloaded: 0
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},
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|
p2p: {
|
|
downloadSpeed: this.torrent.downloadSpeed,
|
|
numPeers: this.torrent.numPeers,
|
|
uploadSpeed: this.torrent.uploadSpeed,
|
|
downloaded: this.torrent.downloaded,
|
|
uploaded: this.torrent.uploaded
|
|
},
|
|
bandwidthEstimate: this.webtorrent.downloadSpeed
|
|
} as PlayerNetworkInfo)
|
|
}, this.CONSTANTS.INFO_SCHEDULER)
|
|
}
|
|
|
|
private fallbackToHttp (options: PlayOptions, done?: (err?: Error) => void) {
|
|
const paused = this.player.paused()
|
|
|
|
this.disableAutoResolution()
|
|
|
|
this.flushVideoFile(this.currentVideoFile, true)
|
|
this.torrent = null
|
|
|
|
// Enable error display now this is our last fallback
|
|
this.player.one('error', () => this.player.peertube().displayFatalError())
|
|
|
|
let httpUrl = this.currentVideoFile.fileUrl
|
|
|
|
if (this.requiresAuth && this.videoFileToken) {
|
|
httpUrl = addQueryParams(httpUrl, { videoFileToken: this.videoFileToken() })
|
|
}
|
|
|
|
this.player.src = this.savePlayerSrcFunction
|
|
this.player.src(httpUrl)
|
|
|
|
this.selectAppropriateResolution(true)
|
|
|
|
// We changed the source, so reinit captions
|
|
this.player.trigger('sourcechange')
|
|
|
|
return this.tryToPlay(err => {
|
|
if (err && done) return done(err)
|
|
|
|
if (options.seek) this.seek(options.seek)
|
|
if (options.forcePlay === false && paused === true) this.player.pause()
|
|
|
|
if (done) return done()
|
|
})
|
|
}
|
|
|
|
private handleError (err: Error | string) {
|
|
return this.player.trigger('customError', { err })
|
|
}
|
|
|
|
private pickAverageVideoFile () {
|
|
if (this.videoFiles.length === 1) return this.videoFiles[0]
|
|
|
|
const files = this.videoFiles.filter(f => f.resolution.id !== 0)
|
|
return files[Math.floor(files.length / 2)]
|
|
}
|
|
|
|
private stopTorrent (torrent: WebTorrent.Torrent) {
|
|
torrent.pause()
|
|
// Pause does not remove actual peers (in particular the webseed peer)
|
|
torrent.removePeer((torrent as any)['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) {
|
|
logger.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) {
|
|
logger.info('Cannot destroy correctly fake renderer.', err)
|
|
}
|
|
}
|
|
this.fakeRenderer = undefined
|
|
}
|
|
}
|
|
|
|
private buildQualities () {
|
|
const resolutions: PeerTubeResolution[] = this.videoFiles.map(file => ({
|
|
id: file.resolution.id,
|
|
label: this.buildQualityLabel(file),
|
|
height: file.resolution.id,
|
|
selected: false,
|
|
selectCallback: () => this.changeQuality(file.resolution.id)
|
|
}))
|
|
|
|
resolutions.push({
|
|
id: -1,
|
|
label: this.player.localize('Auto'),
|
|
selected: true,
|
|
selectCallback: () => this.changeQuality(-1)
|
|
})
|
|
|
|
this.player.peertubeResolutions().add(resolutions)
|
|
}
|
|
|
|
private buildQualityLabel (file: VideoFile) {
|
|
let label = file.resolution.label
|
|
|
|
if (file.fps && file.fps >= 50) {
|
|
label += file.fps
|
|
}
|
|
|
|
return label
|
|
}
|
|
|
|
private selectAppropriateResolution (byEngine: boolean) {
|
|
const resolution = this.autoResolution
|
|
? -1
|
|
: this.getCurrentResolutionId()
|
|
|
|
const autoResolutionChosen = this.autoResolution
|
|
? this.getCurrentResolutionId()
|
|
: undefined
|
|
|
|
this.player.peertubeResolutions().select({ id: resolution, autoResolutionChosenId: autoResolutionChosen, byEngine })
|
|
}
|
|
}
|
|
|
|
videojs.registerPlugin('webtorrent', WebTorrentPlugin)
|
|
export { WebTorrentPlugin }
|