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   videoFileMaxByResolution,
  15   videoFileMinByResolution
  16 } from './utils'
  17 import * as CacheChunkStore from 'cache-chunk-store'
  18 import { PeertubeChunkStore } from './peertube-chunk-store'
  19
  20 const webtorrent = new WebTorrent({
  21   tracker: {
  22     rtcConfig: {
  23       iceServers: [
  24         {
  25           urls: 'stun:stun.stunprotocol.org'
  26         },
  27         {
  28           urls: 'stun:stun.framasoft.org'
  29         }
  30       ]
  31     }
  32   },
  33   dht: false
  34 })
  35
  36 const Plugin: VideoJSComponentInterface = videojsUntyped.getPlugin('plugin')
  37 class PeerTubePlugin extends Plugin {
  38   private readonly playerElement: HTMLVideoElement
  39
  40   private readonly autoplay: boolean = false
  41   private readonly startTime: number = 0
  42   private readonly savePlayerSrcFunction: Function
  43   private readonly videoFiles: VideoFile[]
  44   private readonly videoViewUrl: string
  45   private readonly videoDuration: number
  46   private readonly CONSTANTS = {
  47     INFO_SCHEDULER: 1000, // Don't change this
  48     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  49     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  50     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  51     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  52     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
  53   }
  54
  55   private player: any
  56   private currentVideoFile: VideoFile
  57   private torrent: WebTorrent.Torrent
  58   private autoResolution = true
  59   private isAutoResolutionObservation = false
  60
  61   private videoViewInterval
  62   private torrentInfoInterval
  63   private autoQualityInterval
  64   private addTorrentDelay
  65   private qualityObservationTimer
  66   private runAutoQualitySchedulerTimer
  67
  68   private downloadSpeeds: number[] = []
  69
  70   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  71     super(player, options)
  72
  73     // Disable auto play on iOS
  74     this.autoplay = options.autoplay && this.isIOS() === false
  75
  76     this.startTime = options.startTime
  77     this.videoFiles = options.videoFiles
  78     this.videoViewUrl = options.videoViewUrl
  79     this.videoDuration = options.videoDuration
  80
  81     this.savePlayerSrcFunction = this.player.src
  82     // Hack to "simulate" src link in video.js >= 6
  83     // Without this, we can't play the video after pausing it
  84     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
  85     this.player.src = () => true
  86
  87     this.playerElement = options.playerElement
  88
  89     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
  90
  91     this.player.ready(() => {
  92       const volume = getStoredVolume()
  93       if (volume !== undefined) this.player.volume(volume)
  94       const muted = getStoredMute()
  95       if (muted !== undefined) this.player.muted(muted)
  96
  97       this.initializePlayer()
  98       this.runTorrentInfoScheduler()
  99       this.runViewAdd()
 100
 101       this.player.one('play', () => {
 102         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 103         this.runAutoQualitySchedulerTimer = setTimeout(() => {
 104           this.runAutoQualityScheduler()
 105         }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 106       })
 107     })
 108
 109     this.player.on('volumechange', () => {
 110       saveVolumeInStore(this.player.volume())
 111       saveMuteInStore(this.player.muted())
 112     })
 113   }
 114
 115   dispose () {
 116     clearTimeout(this.addTorrentDelay)
 117     clearTimeout(this.qualityObservationTimer)
 118     clearTimeout(this.runAutoQualitySchedulerTimer)
 119
 120     clearInterval(this.videoViewInterval)
 121     clearInterval(this.torrentInfoInterval)
 122     clearInterval(this.autoQualityInterval)
 123
 124     // Don't need to destroy renderer, video player will be destroyed
 125     this.flushVideoFile(this.currentVideoFile, false)
 126   }
 127
 128   getCurrentResolutionId () {
 129     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 130   }
 131
 132   getCurrentResolutionLabel () {
 133     return this.currentVideoFile ? this.currentVideoFile.resolution.label : ''
 134   }
 135
 136   updateVideoFile (
 137     videoFile?: VideoFile,
 138     options: {
 139       forcePlay?: boolean,
 140       seek?: number,
 141       delay?: number
 142     } = {},
 143     done: () => void = () => { /* empty */ }
 144   ) {
 145     // Automatically choose the adapted video file
 146     if (videoFile === undefined) {
 147       const savedAverageBandwidth = getAverageBandwidth()
 148       videoFile = savedAverageBandwidth
 149         ? this.getAppropriateFile(savedAverageBandwidth)
 150         : this.pickAverageVideoFile()
 151     }
 152
 153     // Don't add the same video file once again
 154     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 155       return
 156     }
 157
 158     // Do not display error to user because we will have multiple fallback
 159     this.disableErrorDisplay()
 160
 161     this.player.src = () => true
 162     const oldPlaybackRate = this.player.playbackRate()
 163
 164     const previousVideoFile = this.currentVideoFile
 165     this.currentVideoFile = videoFile
 166
 167     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 168       this.player.playbackRate(oldPlaybackRate)
 169       return done()
 170     })
 171
 172     this.trigger('videoFileUpdate')
 173   }
 174
 175   addTorrent (
 176     magnetOrTorrentUrl: string,
 177     previousVideoFile: VideoFile,
 178     options: {
 179       forcePlay?: boolean,
 180       seek?: number,
 181       delay?: number
 182     },
 183     done: Function
 184   ) {
 185     console.log('Adding ' + magnetOrTorrentUrl + '.')
 186
 187     const oldTorrent = this.torrent
 188     const torrentOptions = {
 189       store: (chunkLength, storeOpts) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 190         max: 100
 191       })
 192     }
 193
 194     this.torrent = webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 195       console.log('Added ' + magnetOrTorrentUrl + '.')
 196
 197       // Pause the old torrent
 198       if (oldTorrent) {
 199         oldTorrent.pause()
 200         // Pause does not remove actual peers (in particular the webseed peer)
 201         oldTorrent.removePeer(oldTorrent['ws'])
 202       }
 203
 204       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 205       this.addTorrentDelay = setTimeout(() => {
 206         const paused = this.player.paused()
 207
 208         this.flushVideoFile(previousVideoFile)
 209
 210         const renderVideoOptions = { autoplay: false, controls: true }
 211         renderVideo(torrent.files[0], this.playerElement, renderVideoOptions,(err, renderer) => {
 212           this.renderer = renderer
 213
 214           if (err) return this.fallbackToHttp(done)
 215
 216           return this.tryToPlay(err => {
 217             if (err) return done(err)
 218
 219             if (options.seek) this.seek(options.seek)
 220             if (options.forcePlay === false && paused === true) this.player.pause()
 221           })
 222         })
 223       }, options.delay || 0)
 224     })
 225
 226     this.torrent.on('error', err => this.handleError(err))
 227
 228     this.torrent.on('warning', (err: any) => {
 229       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 230       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 231
 232       // Users don't care about issues with WebRTC, but developers do so log it in the console
 233       if (err.message.indexOf('Ice connection failed') !== -1) {
 234         console.error(err)
 235         return
 236       }
 237
 238       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 239       if (err.message.indexOf('incorrect info hash') !== -1) {
 240         console.error('Incorrect info hash detected, falling back to torrent file.')
 241         const options = { forcePlay: true }
 242         return this.addTorrent(this.torrent['xs'], previousVideoFile, options, done)
 243       }
 244
 245       return this.handleError(err)
 246     })
 247   }
 248
 249   updateResolution (resolutionId: number, delay = 0) {
 250     // Remember player state
 251     const currentTime = this.player.currentTime()
 252     const isPaused = this.player.paused()
 253
 254     // Remove poster to have black background
 255     this.playerElement.poster = ''
 256
 257     // Hide bigPlayButton
 258     if (!isPaused) {
 259       this.player.bigPlayButton.hide()
 260     }
 261
 262     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 263     const options = {
 264       forcePlay: false,
 265       delay,
 266       seek: currentTime
 267     }
 268     this.updateVideoFile(newVideoFile, options)
 269   }
 270
 271   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 272     if (videoFile !== undefined && webtorrent.get(videoFile.magnetUri)) {
 273       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 274
 275       webtorrent.remove(videoFile.magnetUri)
 276       console.log('Removed ' + videoFile.magnetUri)
 277     }
 278   }
 279
 280   isAutoResolutionOn () {
 281     return this.autoResolution
 282   }
 283
 284   enableAutoResolution () {
 285     this.autoResolution = true
 286     this.trigger('autoResolutionUpdate')
 287   }
 288
 289   disableAutoResolution () {
 290     this.autoResolution = false
 291     this.trigger('autoResolutionUpdate')
 292   }
 293
 294   getCurrentVideoFile () {
 295     return this.currentVideoFile
 296   }
 297
 298   getTorrent () {
 299     return this.torrent
 300   }
 301
 302   private tryToPlay (done?: Function) {
 303     if (!done) done = function () { /* empty */ }
 304
 305     const playPromise = this.player.play()
 306     if (playPromise !== undefined) {
 307       return playPromise.then(done)
 308                         .catch(err => {
 309                           console.error(err)
 310                           this.player.pause()
 311                           this.player.posterImage.show()
 312                           this.player.removeClass('vjs-has-autoplay')
 313
 314                           return done()
 315                         })
 316     }
 317
 318     return done()
 319   }
 320
 321   private seek (time: number) {
 322     this.player.currentTime(time)
 323     this.player.handleTechSeeked_()
 324   }
 325
 326   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 327     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 328     if (this.videoFiles.length === 1) return this.videoFiles[0]
 329
 330     // Don't change the torrent is the play was ended
 331     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 332
 333     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 334
 335     // Filter videos we can play according to our bandwidth
 336     const filteredFiles = this.videoFiles.filter(f => {
 337       const fileBitrate = (f.size / this.videoDuration)
 338       let threshold = fileBitrate
 339
 340       // If this is for a higher resolution or an initial load: add a margin
 341       if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 342         threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 343       }
 344
 345       return averageDownloadSpeed > threshold
 346     })
 347
 348     // If the download speed is too bad, return the lowest resolution we have
 349     if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
 350
 351     return videoFileMaxByResolution(filteredFiles)
 352   }
 353
 354   private getAndSaveActualDownloadSpeed () {
 355     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 356     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 357     if (lastDownloadSpeeds.length === 0) return -1
 358
 359     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 360     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 361
 362     // Save the average bandwidth for future use
 363     saveAverageBandwidth(averageBandwidth)
 364
 365     return averageBandwidth
 366   }
 367
 368   private initializePlayer () {
 369     this.initSmoothProgressBar()
 370
 371     this.alterInactivity()
 372
 373     if (this.autoplay === true) {
 374       this.player.posterImage.hide()
 375
 376       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 377     } else {
 378       // Don't try on iOS that does not support MediaSource
 379       if (this.isIOS()) {
 380         this.currentVideoFile = this.pickAverageVideoFile()
 381         return this.fallbackToHttp(undefined, false)
 382       }
 383
 384       // Proxy first play
 385       const oldPlay = this.player.play.bind(this.player)
 386       this.player.play = () => {
 387         this.player.addClass('vjs-has-big-play-button-clicked')
 388         this.player.play = oldPlay
 389
 390         this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 391       }
 392     }
 393   }
 394
 395   private runAutoQualityScheduler () {
 396     this.autoQualityInterval = setInterval(() => {
 397
 398       // Not initialized or in HTTP fallback
 399       if (this.torrent === undefined || this.torrent === null) return
 400       if (this.isAutoResolutionOn() === false) return
 401       if (this.isAutoResolutionObservation === true) return
 402
 403       const file = this.getAppropriateFile()
 404       let changeResolution = false
 405       let changeResolutionDelay = 0
 406
 407       // Lower resolution
 408       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 409         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 410         changeResolution = true
 411       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 412         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 413         changeResolution = true
 414         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 415       }
 416
 417       if (changeResolution === true) {
 418         this.updateResolution(file.resolution.id, changeResolutionDelay)
 419
 420         // Wait some seconds in observation of our new resolution
 421         this.isAutoResolutionObservation = true
 422
 423         this.qualityObservationTimer = setTimeout(() => {
 424           this.isAutoResolutionObservation = false
 425         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 426       }
 427     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 428   }
 429
 430   private isPlayerWaiting () {
 431     return this.player && this.player.hasClass('vjs-waiting')
 432   }
 433
 434   private runTorrentInfoScheduler () {
 435     this.torrentInfoInterval = setInterval(() => {
 436       // Not initialized yet
 437       if (this.torrent === undefined) return
 438
 439       // Http fallback
 440       if (this.torrent === null) return this.trigger('torrentInfo', false)
 441
 442       // webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 443       if (webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(webtorrent.downloadSpeed)
 444
 445       return this.trigger('torrentInfo', {
 446         downloadSpeed: this.torrent.downloadSpeed,
 447         numPeers: this.torrent.numPeers,
 448         uploadSpeed: this.torrent.uploadSpeed
 449       })
 450     }, this.CONSTANTS.INFO_SCHEDULER)
 451   }
 452
 453   private runViewAdd () {
 454     this.clearVideoViewInterval()
 455
 456     // After 30 seconds (or 3/4 of the video), add a view to the video
 457     let minSecondsToView = 30
 458
 459     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 460
 461     let secondsViewed = 0
 462     this.videoViewInterval = setInterval(() => {
 463       if (this.player && !this.player.paused()) {
 464         secondsViewed += 1
 465
 466         if (secondsViewed > minSecondsToView) {
 467           this.clearVideoViewInterval()
 468
 469           this.addViewToVideo().catch(err => console.error(err))
 470         }
 471       }
 472     }, 1000)
 473   }
 474
 475   private clearVideoViewInterval () {
 476     if (this.videoViewInterval !== undefined) {
 477       clearInterval(this.videoViewInterval)
 478       this.videoViewInterval = undefined
 479     }
 480   }
 481
 482   private addViewToVideo () {
 483     return fetch(this.videoViewUrl, { method: 'POST' })
 484   }
 485
 486   private fallbackToHttp (done?: Function, play = true) {
 487     this.flushVideoFile(this.currentVideoFile, true)
 488     this.torrent = null
 489
 490     // Enable error display now this is our last fallback
 491     this.player.one('error', () => this.enableErrorDisplay())
 492
 493     const httpUrl = this.currentVideoFile.fileUrl
 494     this.player.src = this.savePlayerSrcFunction
 495     this.player.src(httpUrl)
 496     if (play) this.tryToPlay()
 497
 498     if (done) return done()
 499   }
 500
 501   private handleError (err: Error | string) {
 502     return this.player.trigger('customError', { err })
 503   }
 504
 505   private enableErrorDisplay () {
 506     this.player.addClass('vjs-error-display-enabled')
 507   }
 508
 509   private disableErrorDisplay () {
 510     this.player.removeClass('vjs-error-display-enabled')
 511   }
 512
 513   private isIOS () {
 514     return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
 515   }
 516
 517   private alterInactivity () {
 518     let saveInactivityTimeout: number
 519
 520     const disableInactivity = () => {
 521       saveInactivityTimeout = this.player.options_.inactivityTimeout
 522       this.player.options_.inactivityTimeout = 0
 523     }
 524     const enableInactivity = () => {
 525       this.player.options_.inactivityTimeout = saveInactivityTimeout
 526     }
 527
 528     const settingsDialog = this.player.children_.find(c => c.name_ === 'SettingsDialog')
 529
 530     this.player.controlBar.on('mouseenter', () => disableInactivity())
 531     settingsDialog.on('mouseenter', () => disableInactivity())
 532     this.player.controlBar.on('mouseleave', () => enableInactivity())
 533     settingsDialog.on('mouseleave', () => enableInactivity())
 534   }
 535
 536   private pickAverageVideoFile () {
 537     if (this.videoFiles.length === 1) return this.videoFiles[0]
 538
 539     return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
 540   }
 541
 542   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 543   private initSmoothProgressBar () {
 544     const SeekBar = videojsUntyped.getComponent('SeekBar')
 545     SeekBar.prototype.getPercent = function getPercent () {
 546       // Allows for smooth scrubbing, when player can't keep up.
 547       // const time = (this.player_.scrubbing()) ?
 548       //   this.player_.getCache().currentTime :
 549       //   this.player_.currentTime()
 550       const time = this.player_.currentTime()
 551       const percent = time / this.player_.duration()
 552       return percent >= 1 ? 1 : percent
 553     }
 554     SeekBar.prototype.handleMouseMove = function handleMouseMove (event) {
 555       let newTime = this.calculateDistance(event) * this.player_.duration()
 556       if (newTime === this.player_.duration()) {
 557         newTime = newTime - 0.1
 558       }
 559       this.player_.currentTime(newTime)
 560       this.update()
 561     }
 562   }
 563 }
 564
 565 videojsUntyped.registerPlugin('peertube', PeerTubePlugin)
 566 export { PeerTubePlugin }