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 { getAverageBandwidth, getStoredMute, getStoredVolume, saveAverageBandwidth, saveMuteInStore, saveVolumeInStore } from './utils'
   8 import minBy from 'lodash-es/minBy'
   9 import maxBy from 'lodash-es/maxBy'
  10 import * as CacheChunkStore from 'cache-chunk-store'
  11 import { PeertubeChunkStore } from './peertube-chunk-store'
  12
  13 const webtorrent = new WebTorrent({
  14   tracker: {
  15     rtcConfig: {
  16       iceServers: [
  17         {
  18           urls: 'stun:stun.stunprotocol.org'
  19         },
  20         {
  21           urls: 'stun:stun.framasoft.org'
  22         }
  23       ]
  24     }
  25   },
  26   dht: false
  27 })
  28
  29 const Plugin: VideoJSComponentInterface = videojsUntyped.getPlugin('plugin')
  30 class PeerTubePlugin extends Plugin {
  31   private readonly playerElement: HTMLVideoElement
  32
  33   private readonly autoplay: boolean = false
  34   private readonly startTime: number = 0
  35   private readonly savePlayerSrcFunction: Function
  36   private readonly videoFiles: VideoFile[]
  37   private readonly videoViewUrl: string
  38   private readonly videoDuration: number
  39   private readonly CONSTANTS = {
  40     INFO_SCHEDULER: 1000, // Don't change this
  41     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  42     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  43     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  44     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  45     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
  46   }
  47
  48   private player: any
  49   private currentVideoFile: VideoFile
  50   private torrent: WebTorrent.Torrent
  51   private autoResolution = true
  52   private isAutoResolutionObservation = false
  53
  54   private videoViewInterval
  55   private torrentInfoInterval
  56   private autoQualityInterval
  57   private addTorrentDelay
  58   private qualityObservationTimer
  59   private runAutoQualitySchedulerTimer
  60
  61   private downloadSpeeds: number[] = []
  62
  63   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  64     super(player, options)
  65
  66     // Disable auto play on iOS
  67     this.autoplay = options.autoplay && this.isIOS() === false
  68
  69     this.startTime = options.startTime
  70     this.videoFiles = options.videoFiles
  71     this.videoViewUrl = options.videoViewUrl
  72     this.videoDuration = options.videoDuration
  73
  74     this.savePlayerSrcFunction = this.player.src
  75     // Hack to "simulate" src link in video.js >= 6
  76     // Without this, we can't play the video after pausing it
  77     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
  78     this.player.src = () => true
  79
  80     this.playerElement = options.playerElement
  81
  82     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
  83
  84     this.player.ready(() => {
  85       const volume = getStoredVolume()
  86       if (volume !== undefined) this.player.volume(volume)
  87       const muted = getStoredMute()
  88       if (muted !== undefined) this.player.muted(muted)
  89
  90       this.initializePlayer()
  91       this.runTorrentInfoScheduler()
  92       this.runViewAdd()
  93
  94       this.player.one('play', () => {
  95         // Don't run immediately scheduler, wait some seconds the TCP connections are made
  96         this.runAutoQualitySchedulerTimer = setTimeout(() => {
  97           this.runAutoQualityScheduler()
  98         }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
  99       })
 100     })
 101
 102     this.player.on('volumechange', () => {
 103       saveVolumeInStore(this.player.volume())
 104       saveMuteInStore(this.player.muted())
 105     })
 106   }
 107
 108   dispose () {
 109     clearTimeout(this.addTorrentDelay)
 110     clearTimeout(this.qualityObservationTimer)
 111     clearTimeout(this.runAutoQualitySchedulerTimer)
 112
 113     clearInterval(this.videoViewInterval)
 114     clearInterval(this.torrentInfoInterval)
 115     clearInterval(this.autoQualityInterval)
 116
 117     // Don't need to destroy renderer, video player will be destroyed
 118     this.flushVideoFile(this.currentVideoFile, false)
 119   }
 120
 121   getCurrentResolutionId () {
 122     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 123   }
 124
 125   getCurrentResolutionLabel () {
 126     return this.currentVideoFile ? this.currentVideoFile.resolution.label : ''
 127   }
 128
 129   updateVideoFile (
 130     videoFile?: VideoFile,
 131     options: {
 132       forcePlay?: boolean,
 133       seek?: number,
 134       delay?: number
 135     } = {},
 136     done: () => void = () => { /* empty */ }
 137   ) {
 138     // Automatically choose the adapted video file
 139     if (videoFile === undefined) {
 140       const savedAverageBandwidth = getAverageBandwidth()
 141       videoFile = savedAverageBandwidth
 142         ? this.getAppropriateFile(savedAverageBandwidth)
 143         : this.videoFiles[0]
 144     }
 145
 146     // Don't add the same video file once again
 147     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 148       return
 149     }
 150
 151     // Do not display error to user because we will have multiple fallback
 152     this.disableErrorDisplay()
 153
 154     this.player.src = () => true
 155     const oldPlaybackRate = this.player.playbackRate()
 156
 157     const previousVideoFile = this.currentVideoFile
 158     this.currentVideoFile = videoFile
 159
 160     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 161       this.player.playbackRate(oldPlaybackRate)
 162       return done()
 163     })
 164
 165     this.trigger('videoFileUpdate')
 166   }
 167
 168   addTorrent (
 169     magnetOrTorrentUrl: string,
 170     previousVideoFile: VideoFile,
 171     options: {
 172       forcePlay?: boolean,
 173       seek?: number,
 174       delay?: number
 175     },
 176     done: Function
 177   ) {
 178     console.log('Adding ' + magnetOrTorrentUrl + '.')
 179
 180     const oldTorrent = this.torrent
 181     const torrentOptions = {
 182       store: (chunkLength, storeOpts) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 183         max: 100
 184       })
 185     }
 186
 187     this.torrent = webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 188       console.log('Added ' + magnetOrTorrentUrl + '.')
 189
 190       // Pause the old torrent
 191       if (oldTorrent) {
 192         oldTorrent.pause()
 193         // Pause does not remove actual peers (in particular the webseed peer)
 194         oldTorrent.removePeer(oldTorrent['ws'])
 195       }
 196
 197       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 198       this.addTorrentDelay = setTimeout(() => {
 199         const paused = this.player.paused()
 200
 201         this.flushVideoFile(previousVideoFile)
 202
 203         const renderVideoOptions = { autoplay: false, controls: true }
 204         renderVideo(torrent.files[0], this.playerElement, renderVideoOptions,(err, renderer) => {
 205           this.renderer = renderer
 206
 207           if (err) return this.fallbackToHttp(done)
 208
 209           return this.tryToPlay(err => {
 210             if (err) return done(err)
 211
 212             if (options.seek) this.seek(options.seek)
 213             if (options.forcePlay === false && paused === true) this.player.pause()
 214           })
 215         })
 216       }, options.delay || 0)
 217     })
 218
 219     this.torrent.on('error', err => this.handleError(err))
 220
 221     this.torrent.on('warning', (err: any) => {
 222       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 223       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 224
 225       // Users don't care about issues with WebRTC, but developers do so log it in the console
 226       if (err.message.indexOf('Ice connection failed') !== -1) {
 227         console.error(err)
 228         return
 229       }
 230
 231       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 232       if (err.message.indexOf('incorrect info hash') !== -1) {
 233         console.error('Incorrect info hash detected, falling back to torrent file.')
 234         const options = { forcePlay: true }
 235         return this.addTorrent(this.torrent['xs'], previousVideoFile, options, done)
 236       }
 237
 238       return this.handleError(err)
 239     })
 240   }
 241
 242   updateResolution (resolutionId: number, delay = 0) {
 243     // Remember player state
 244     const currentTime = this.player.currentTime()
 245     const isPaused = this.player.paused()
 246
 247     // Remove poster to have black background
 248     this.playerElement.poster = ''
 249
 250     // Hide bigPlayButton
 251     if (!isPaused) {
 252       this.player.bigPlayButton.hide()
 253     }
 254
 255     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 256     const options = {
 257       forcePlay: false,
 258       delay,
 259       seek: currentTime
 260     }
 261     this.updateVideoFile(newVideoFile, options)
 262   }
 263
 264   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 265     if (videoFile !== undefined && webtorrent.get(videoFile.magnetUri)) {
 266       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 267
 268       webtorrent.remove(videoFile.magnetUri)
 269       console.log('Removed ' + videoFile.magnetUri)
 270     }
 271   }
 272
 273   isAutoResolutionOn () {
 274     return this.autoResolution
 275   }
 276
 277   enableAutoResolution () {
 278     this.autoResolution = true
 279     this.trigger('autoResolutionUpdate')
 280   }
 281
 282   disableAutoResolution () {
 283     this.autoResolution = false
 284     this.trigger('autoResolutionUpdate')
 285   }
 286
 287   getCurrentVideoFile () {
 288     return this.currentVideoFile
 289   }
 290
 291   getTorrent () {
 292     return this.torrent
 293   }
 294
 295   private tryToPlay (done?: Function) {
 296     if (!done) done = function () { /* empty */ }
 297
 298     const playPromise = this.player.play()
 299     if (playPromise !== undefined) {
 300       return playPromise.then(done)
 301                         .catch(err => {
 302                           console.error(err)
 303                           this.player.pause()
 304                           this.player.posterImage.show()
 305                           this.player.removeClass('vjs-has-autoplay')
 306
 307                           return done()
 308                         })
 309     }
 310
 311     return done()
 312   }
 313
 314   private seek (time: number) {
 315     this.player.currentTime(time)
 316     this.player.handleTechSeeked_()
 317   }
 318
 319   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 320     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 321     if (this.videoFiles.length === 1) return this.videoFiles[0]
 322
 323     // Don't change the torrent is the play was ended
 324     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 325
 326     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 327
 328     // Filter videos we can play according to our bandwidth
 329     const filteredFiles = this.videoFiles.filter(f => {
 330       const fileBitrate = (f.size / this.videoDuration)
 331       let threshold = fileBitrate
 332
 333       // If this is for a higher resolution or an initial load: add a margin
 334       if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 335         threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 336       }
 337
 338       return averageDownloadSpeed > threshold
 339     })
 340
 341     // If the download speed is too bad, return the lowest resolution we have
 342     if (filteredFiles.length === 0) return minBy(this.videoFiles, 'resolution.id')
 343
 344     return maxBy(filteredFiles, 'resolution.id')
 345   }
 346
 347   private getAndSaveActualDownloadSpeed () {
 348     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 349     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 350     if (lastDownloadSpeeds.length === 0) return -1
 351
 352     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 353     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 354
 355     // Save the average bandwidth for future use
 356     saveAverageBandwidth(averageBandwidth)
 357
 358     return averageBandwidth
 359   }
 360
 361   private initializePlayer () {
 362     this.initSmoothProgressBar()
 363
 364     this.alterInactivity()
 365
 366     if (this.autoplay === true) {
 367       this.player.posterImage.hide()
 368
 369       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 370     } else {
 371       // Don't try on iOS that does not support MediaSource
 372       if (this.isIOS()) {
 373         this.currentVideoFile = this.videoFiles[0]
 374         return this.fallbackToHttp(undefined, false)
 375       }
 376
 377       // Proxy first play
 378       const oldPlay = this.player.play.bind(this.player)
 379       this.player.play = () => {
 380         this.player.addClass('vjs-has-big-play-button-clicked')
 381         this.player.play = oldPlay
 382
 383         this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 384       }
 385     }
 386   }
 387
 388   private runAutoQualityScheduler () {
 389     this.autoQualityInterval = setInterval(() => {
 390
 391       // Not initialized or in HTTP fallback
 392       if (this.torrent === undefined || this.torrent === null) return
 393       if (this.isAutoResolutionOn() === false) return
 394       if (this.isAutoResolutionObservation === true) return
 395
 396       const file = this.getAppropriateFile()
 397       let changeResolution = false
 398       let changeResolutionDelay = 0
 399
 400       // Lower resolution
 401       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 402         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 403         changeResolution = true
 404       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 405         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 406         changeResolution = true
 407         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 408       }
 409
 410       if (changeResolution === true) {
 411         this.updateResolution(file.resolution.id, changeResolutionDelay)
 412
 413         // Wait some seconds in observation of our new resolution
 414         this.isAutoResolutionObservation = true
 415
 416         this.qualityObservationTimer = setTimeout(() => {
 417           this.isAutoResolutionObservation = false
 418         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 419       }
 420     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 421   }
 422
 423   private isPlayerWaiting () {
 424     return this.player && this.player.hasClass('vjs-waiting')
 425   }
 426
 427   private runTorrentInfoScheduler () {
 428     this.torrentInfoInterval = setInterval(() => {
 429       // Not initialized yet
 430       if (this.torrent === undefined) return
 431
 432       // Http fallback
 433       if (this.torrent === null) return this.trigger('torrentInfo', false)
 434
 435       // webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 436       if (webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(webtorrent.downloadSpeed)
 437
 438       return this.trigger('torrentInfo', {
 439         downloadSpeed: this.torrent.downloadSpeed,
 440         numPeers: this.torrent.numPeers,
 441         uploadSpeed: this.torrent.uploadSpeed
 442       })
 443     }, this.CONSTANTS.INFO_SCHEDULER)
 444   }
 445
 446   private runViewAdd () {
 447     this.clearVideoViewInterval()
 448
 449     // After 30 seconds (or 3/4 of the video), add a view to the video
 450     let minSecondsToView = 30
 451
 452     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 453
 454     let secondsViewed = 0
 455     this.videoViewInterval = setInterval(() => {
 456       if (this.player && !this.player.paused()) {
 457         secondsViewed += 1
 458
 459         if (secondsViewed > minSecondsToView) {
 460           this.clearVideoViewInterval()
 461
 462           this.addViewToVideo().catch(err => console.error(err))
 463         }
 464       }
 465     }, 1000)
 466   }
 467
 468   private clearVideoViewInterval () {
 469     if (this.videoViewInterval !== undefined) {
 470       clearInterval(this.videoViewInterval)
 471       this.videoViewInterval = undefined
 472     }
 473   }
 474
 475   private addViewToVideo () {
 476     return fetch(this.videoViewUrl, { method: 'POST' })
 477   }
 478
 479   private fallbackToHttp (done?: Function, play = true) {
 480     this.flushVideoFile(this.currentVideoFile, true)
 481     this.torrent = null
 482
 483     // Enable error display now this is our last fallback
 484     this.player.one('error', () => this.enableErrorDisplay())
 485
 486     const httpUrl = this.currentVideoFile.fileUrl
 487     this.player.src = this.savePlayerSrcFunction
 488     this.player.src(httpUrl)
 489     if (play) this.tryToPlay()
 490
 491     if (done) return done()
 492   }
 493
 494   private handleError (err: Error | string) {
 495     return this.player.trigger('customError', { err })
 496   }
 497
 498   private enableErrorDisplay () {
 499     this.player.addClass('vjs-error-display-enabled')
 500   }
 501
 502   private disableErrorDisplay () {
 503     this.player.removeClass('vjs-error-display-enabled')
 504   }
 505
 506   private isIOS () {
 507     return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
 508   }
 509
 510   private alterInactivity () {
 511     let saveInactivityTimeout: number
 512
 513     const disableInactivity = () => {
 514       saveInactivityTimeout = this.player.options_.inactivityTimeout
 515       this.player.options_.inactivityTimeout = 0
 516     }
 517     const enableInactivity = () => {
 518       this.player.options_.inactivityTimeout = saveInactivityTimeout
 519     }
 520
 521     const settingsDialog = this.player.children_.find(c => c.name_ === 'SettingsDialog')
 522
 523     this.player.controlBar.on('mouseenter', () => disableInactivity())
 524     settingsDialog.on('mouseenter', () => disableInactivity())
 525     this.player.controlBar.on('mouseleave', () => enableInactivity())
 526     settingsDialog.on('mouseleave', () => enableInactivity())
 527   }
 528
 529   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 530   private initSmoothProgressBar () {
 531     const SeekBar = videojsUntyped.getComponent('SeekBar')
 532     SeekBar.prototype.getPercent = function getPercent () {
 533       // Allows for smooth scrubbing, when player can't keep up.
 534       // const time = (this.player_.scrubbing()) ?
 535       //   this.player_.getCache().currentTime :
 536       //   this.player_.currentTime()
 537       const time = this.player_.currentTime()
 538       const percent = time / this.player_.duration()
 539       return percent >= 1 ? 1 : percent
 540     }
 541     SeekBar.prototype.handleMouseMove = function handleMouseMove (event) {
 542       let newTime = this.calculateDistance(event) * this.player_.duration()
 543       if (newTime === this.player_.duration()) {
 544         newTime = newTime - 0.1
 545       }
 546       this.player_.currentTime(newTime)
 547       this.update()
 548     }
 549   }
 550 }
 551
 552 videojsUntyped.registerPlugin('peertube', PeerTubePlugin)
 553 export { PeerTubePlugin }