client/src/assets/player/peertube-videojs-plugin.ts

   1 import * as videojs from 'video.js'
   2 import * as WebTorrent from 'webtorrent'
   3 import { VideoFile } from '../../../../shared/models/videos/video.model'
   4 import { renderVideo } from './video-renderer'
   5 import './settings-menu-button'
   6 import { PeertubePluginOptions, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
   7 import {
   8   getAverageBandwidth,
   9   getStoredMute,
  10   getStoredVolume,
  11   saveAverageBandwidth,
  12   saveMuteInStore,
  13   saveVolumeInStore
  14 } from './utils'
  15 import minBy from 'lodash-es/minBy'
  16 import maxBy from 'lodash-es/maxBy'
  17
  18 const webtorrent = new WebTorrent({
  19   tracker: {
  20     rtcConfig: {
  21       iceServers: [
  22         {
  23           urls: 'stun:stun.stunprotocol.org'
  24         },
  25         {
  26           urls: 'stun:stun.framasoft.org'
  27         }
  28       ]
  29     }
  30   },
  31   dht: false
  32 })
  33
  34 const Plugin: VideoJSComponentInterface = videojsUntyped.getPlugin('plugin')
  35 class PeerTubePlugin extends Plugin {
  36   private readonly playerElement: HTMLVideoElement
  37
  38   private readonly autoplay: boolean = false
  39   private readonly startTime: number = 0
  40   private readonly savePlayerSrcFunction: Function
  41   private readonly videoFiles: VideoFile[]
  42   private readonly videoViewUrl: string
  43   private readonly videoDuration: number
  44   private readonly CONSTANTS = {
  45     INFO_SCHEDULER: 1000, // Don't change this
  46     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  47     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  48     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  49     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  50     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
  51   }
  52
  53   private player: any
  54   private currentVideoFile: VideoFile
  55   private torrent: WebTorrent.Torrent
  56   private autoResolution = true
  57   private isAutoResolutionObservation = false
  58
  59   private videoViewInterval
  60   private torrentInfoInterval
  61   private autoQualityInterval
  62   private addTorrentDelay
  63   private qualityObservationTimer
  64   private runAutoQualitySchedulerTimer
  65
  66   private downloadSpeeds: number[] = []
  67
  68   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  69     super(player, options)
  70
  71     // Fix canplay event on google chrome by disabling default videojs autoplay
  72     this.autoplay = this.player.options_.autoplay
  73     this.player.options_.autoplay = false
  74
  75     this.startTime = options.startTime
  76     this.videoFiles = options.videoFiles
  77     this.videoViewUrl = options.videoViewUrl
  78     this.videoDuration = options.videoDuration
  79
  80     this.savePlayerSrcFunction = this.player.src
  81     // Hack to "simulate" src link in video.js >= 6
  82     // Without this, we can't play the video after pausing it
  83     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
  84     this.player.src = () => true
  85
  86     this.playerElement = options.playerElement
  87
  88     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
  89
  90     this.player.ready(() => {
  91       const volume = getStoredVolume()
  92       if (volume !== undefined) this.player.volume(volume)
  93       const muted = getStoredMute()
  94       if (muted !== undefined) this.player.muted(muted)
  95
  96       this.initializePlayer()
  97       this.runTorrentInfoScheduler()
  98       this.runViewAdd()
  99
 100       this.player.one('play', () => {
 101         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 102         this.runAutoQualitySchedulerTimer = setTimeout(() => {
 103           this.runAutoQualityScheduler()
 104         }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 105       })
 106     })
 107
 108     this.player.on('volumechange', () => {
 109       saveVolumeInStore(this.player.volume())
 110       saveMuteInStore(this.player.muted())
 111     })
 112   }
 113
 114   dispose () {
 115     clearTimeout(this.addTorrentDelay)
 116     clearTimeout(this.qualityObservationTimer)
 117     clearTimeout(this.runAutoQualitySchedulerTimer)
 118
 119     clearInterval(this.videoViewInterval)
 120     clearInterval(this.torrentInfoInterval)
 121     clearInterval(this.autoQualityInterval)
 122
 123     // Don't need to destroy renderer, video player will be destroyed
 124     this.flushVideoFile(this.currentVideoFile, false)
 125   }
 126
 127   getCurrentResolutionId () {
 128     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 129   }
 130
 131   getCurrentResolutionLabel () {
 132     return this.currentVideoFile ? this.currentVideoFile.resolution.label : ''
 133   }
 134
 135   updateVideoFile (videoFile?: VideoFile, delay = 0, done?: () => void) {
 136     if (done === undefined) {
 137       done = () => { /* empty */ }
 138     }
 139
 140     // Automatically choose the adapted video file
 141     if (videoFile === undefined) {
 142       const savedAverageBandwidth = getAverageBandwidth()
 143       videoFile = savedAverageBandwidth
 144         ? this.getAppropriateFile(savedAverageBandwidth)
 145         : this.videoFiles[0]
 146     }
 147
 148     // Don't add the same video file once again
 149     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 150       return
 151     }
 152
 153     // Do not display error to user because we will have multiple fallback
 154     this.disableErrorDisplay()
 155
 156     this.player.src = () => true
 157     const oldPlaybackRate = this.player.playbackRate()
 158
 159     const previousVideoFile = this.currentVideoFile
 160     this.currentVideoFile = videoFile
 161
 162     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, delay, () => {
 163       this.player.playbackRate(oldPlaybackRate)
 164       return done()
 165     })
 166
 167     this.trigger('videoFileUpdate')
 168   }
 169
 170   addTorrent (magnetOrTorrentUrl: string, previousVideoFile: VideoFile, delay = 0, done: Function) {
 171     console.log('Adding ' + magnetOrTorrentUrl + '.')
 172
 173     const oldTorrent = this.torrent
 174     this.torrent = webtorrent.add(magnetOrTorrentUrl, torrent => {
 175       console.log('Added ' + magnetOrTorrentUrl + '.')
 176
 177       // Pause the old torrent
 178       if (oldTorrent) {
 179         oldTorrent.pause()
 180         // Pause does not remove actual peers (in particular the webseed peer)
 181         oldTorrent.removePeer(oldTorrent['ws'])
 182       }
 183
 184       this.addTorrentDelay = setTimeout(() => {
 185         this.flushVideoFile(previousVideoFile)
 186
 187         const options = { autoplay: true, controls: true }
 188         renderVideo(torrent.files[0], this.playerElement, options,(err, renderer) => {
 189           this.renderer = renderer
 190
 191           if (err) return this.fallbackToHttp(done)
 192
 193           if (!this.player.paused()) {
 194             const playPromise = this.player.play()
 195             if (playPromise !== undefined) return playPromise.then(done)
 196
 197             return done()
 198           }
 199
 200           return done()
 201         })
 202       }, delay)
 203     })
 204
 205     this.torrent.on('error', err => this.handleError(err))
 206
 207     this.torrent.on('warning', (err: any) => {
 208       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 209       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 210
 211       // Users don't care about issues with WebRTC, but developers do so log it in the console
 212       if (err.message.indexOf('Ice connection failed') !== -1) {
 213         console.error(err)
 214         return
 215       }
 216
 217       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 218       if (err.message.indexOf('incorrect info hash') !== -1) {
 219         console.error('Incorrect info hash detected, falling back to torrent file.')
 220         return this.addTorrent(this.torrent['xs'], previousVideoFile, 0, done)
 221       }
 222
 223       return this.handleError(err)
 224     })
 225   }
 226
 227   updateResolution (resolutionId: number, delay = 0) {
 228     // Remember player state
 229     const currentTime = this.player.currentTime()
 230     const isPaused = this.player.paused()
 231
 232     // Remove poster to have black background
 233     this.playerElement.poster = ''
 234
 235     // Hide bigPlayButton
 236     if (!isPaused) {
 237       this.player.bigPlayButton.hide()
 238     }
 239
 240     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 241     this.updateVideoFile(newVideoFile, delay, () => this.seek(currentTime))
 242   }
 243
 244   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 245     if (videoFile !== undefined && webtorrent.get(videoFile.magnetUri)) {
 246       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 247
 248       webtorrent.remove(videoFile.magnetUri)
 249       console.log('Removed ' + videoFile.magnetUri)
 250     }
 251   }
 252
 253   isAutoResolutionOn () {
 254     return this.autoResolution
 255   }
 256
 257   enableAutoResolution () {
 258     this.autoResolution = true
 259     this.trigger('autoResolutionUpdate')
 260   }
 261
 262   disableAutoResolution () {
 263     this.autoResolution = false
 264     this.trigger('autoResolutionUpdate')
 265   }
 266
 267   private seek (time: number) {
 268     this.player.currentTime(time)
 269     this.player.handleTechSeeked_()
 270   }
 271
 272   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 273     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 274     if (this.videoFiles.length === 1) return this.videoFiles[0]
 275     if (this.torrent && this.torrent.progress === 1) return this.currentVideoFile
 276
 277     if (!averageDownloadSpeed) averageDownloadSpeed = this.getActualDownloadSpeed()
 278
 279     // Filter videos we can play according to our bandwidth
 280     const filteredFiles = this.videoFiles.filter(f => {
 281       const fileBitrate = (f.size / this.videoDuration)
 282       let threshold = fileBitrate
 283
 284       // If this is for a higher resolution or an initial load: add a margin
 285       if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 286         threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 287       }
 288
 289       return averageDownloadSpeed > threshold
 290     })
 291
 292     // If the download speed is too bad, return the lowest resolution we have
 293     if (filteredFiles.length === 0) return minBy(this.videoFiles, 'resolution.id')
 294
 295     return maxBy(filteredFiles, 'resolution.id')
 296   }
 297
 298   private getActualDownloadSpeed () {
 299     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 300     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 301     if (lastDownloadSpeeds.length === 0) return -1
 302
 303     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 304     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 305
 306     // Save the average bandwidth for future use
 307     saveAverageBandwidth(averageBandwidth)
 308
 309     return averageBandwidth
 310   }
 311
 312   private initializePlayer () {
 313     this.initSmoothProgressBar()
 314
 315     this.alterInactivity()
 316
 317     if (this.autoplay === true) {
 318       this.player.posterImage.hide()
 319
 320       this.updateVideoFile(undefined, 0, () => this.seek(this.startTime))
 321     } else {
 322       // Proxy first play
 323       const oldPlay = this.player.play.bind(this.player)
 324       this.player.play = () => {
 325         this.player.addClass('vjs-has-big-play-button-clicked')
 326         this.player.play = oldPlay
 327
 328         this.updateVideoFile(undefined, 0, () => this.seek(this.startTime))
 329       }
 330     }
 331   }
 332
 333   private runAutoQualityScheduler () {
 334     this.autoQualityInterval = setInterval(() => {
 335
 336       // Not initialized or in HTTP fallback
 337       if (this.torrent === undefined || this.torrent === null) return
 338       if (this.isAutoResolutionOn() === false) return
 339       if (this.isAutoResolutionObservation === true) return
 340
 341       const file = this.getAppropriateFile()
 342       let changeResolution = false
 343       let changeResolutionDelay = 0
 344
 345       // Lower resolution
 346       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 347         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 348         changeResolution = true
 349       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 350         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 351         changeResolution = true
 352         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 353       }
 354
 355       if (changeResolution === true) {
 356         this.updateResolution(file.resolution.id, changeResolutionDelay)
 357
 358         // Wait some seconds in observation of our new resolution
 359         this.isAutoResolutionObservation = true
 360
 361         this.qualityObservationTimer = setTimeout(() => {
 362           this.isAutoResolutionObservation = false
 363         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 364       }
 365     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 366   }
 367
 368   private isPlayerWaiting () {
 369     return this.player && this.player.hasClass('vjs-waiting')
 370   }
 371
 372   private runTorrentInfoScheduler () {
 373     this.torrentInfoInterval = setInterval(() => {
 374       // Not initialized yet
 375       if (this.torrent === undefined) return
 376
 377       // Http fallback
 378       if (this.torrent === null) return this.trigger('torrentInfo', false)
 379
 380       // webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 381       if (webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(webtorrent.downloadSpeed)
 382
 383       return this.trigger('torrentInfo', {
 384         downloadSpeed: this.torrent.downloadSpeed,
 385         numPeers: this.torrent.numPeers,
 386         uploadSpeed: this.torrent.uploadSpeed
 387       })
 388     }, this.CONSTANTS.INFO_SCHEDULER)
 389   }
 390
 391   private runViewAdd () {
 392     this.clearVideoViewInterval()
 393
 394     // After 30 seconds (or 3/4 of the video), add a view to the video
 395     let minSecondsToView = 30
 396
 397     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 398
 399     let secondsViewed = 0
 400     this.videoViewInterval = setInterval(() => {
 401       if (this.player && !this.player.paused()) {
 402         secondsViewed += 1
 403
 404         if (secondsViewed > minSecondsToView) {
 405           this.clearVideoViewInterval()
 406
 407           this.addViewToVideo().catch(err => console.error(err))
 408         }
 409       }
 410     }, 1000)
 411   }
 412
 413   private clearVideoViewInterval () {
 414     if (this.videoViewInterval !== undefined) {
 415       clearInterval(this.videoViewInterval)
 416       this.videoViewInterval = undefined
 417     }
 418   }
 419
 420   private addViewToVideo () {
 421     return fetch(this.videoViewUrl, { method: 'POST' })
 422   }
 423
 424   private fallbackToHttp (done: Function) {
 425     this.flushVideoFile(this.currentVideoFile, true)
 426     this.torrent = null
 427
 428     // Enable error display now this is our last fallback
 429     this.player.one('error', () => this.enableErrorDisplay())
 430
 431     const httpUrl = this.currentVideoFile.fileUrl
 432     this.player.src = this.savePlayerSrcFunction
 433     this.player.src(httpUrl)
 434     this.player.play()
 435
 436     return done()
 437   }
 438
 439   private handleError (err: Error | string) {
 440     return this.player.trigger('customError', { err })
 441   }
 442
 443   private enableErrorDisplay () {
 444     this.player.addClass('vjs-error-display-enabled')
 445   }
 446
 447   private disableErrorDisplay () {
 448     this.player.removeClass('vjs-error-display-enabled')
 449   }
 450
 451   private alterInactivity () {
 452     let saveInactivityTimeout: number
 453
 454     const disableInactivity = () => {
 455       saveInactivityTimeout = this.player.options_.inactivityTimeout
 456       this.player.options_.inactivityTimeout = 0
 457     }
 458     const enableInactivity = () => {
 459       this.player.options_.inactivityTimeout = saveInactivityTimeout
 460     }
 461
 462     const settingsDialog = this.player.children_.find(c => c.name_ === 'SettingsDialog')
 463
 464     this.player.controlBar.on('mouseenter', () => disableInactivity())
 465     settingsDialog.on('mouseenter', () => disableInactivity())
 466     this.player.controlBar.on('mouseleave', () => enableInactivity())
 467     settingsDialog.on('mouseleave', () => enableInactivity())
 468   }
 469
 470   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 471   private initSmoothProgressBar () {
 472     const SeekBar = videojsUntyped.getComponent('SeekBar')
 473     SeekBar.prototype.getPercent = function getPercent () {
 474       // Allows for smooth scrubbing, when player can't keep up.
 475       // const time = (this.player_.scrubbing()) ?
 476       //   this.player_.getCache().currentTime :
 477       //   this.player_.currentTime()
 478       const time = this.player_.currentTime()
 479       const percent = time / this.player_.duration()
 480       return percent >= 1 ? 1 : percent
 481     }
 482     SeekBar.prototype.handleMouseMove = function handleMouseMove (event) {
 483       let newTime = this.calculateDistance(event) * this.player_.duration()
 484       if (newTime === this.player_.duration()) {
 485         newTime = newTime - 0.1
 486       }
 487       this.player_.currentTime(newTime)
 488       this.update()
 489     }
 490   }
 491 }
 492
 493 videojsUntyped.registerPlugin('peertube', PeerTubePlugin)
 494 export { PeerTubePlugin }