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, VideoJSCaption, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
   7 import { isMobile, videoFileMaxByResolution, videoFileMinByResolution, timeToInt } from './utils'
   8 import * as CacheChunkStore from 'cache-chunk-store'
   9 import { PeertubeChunkStore } from './peertube-chunk-store'
  10 import {
  11   getAverageBandwidthInStore,
  12   getStoredMute,
  13   getStoredVolume,
  14   saveAverageBandwidth,
  15   saveMuteInStore,
  16   saveVolumeInStore
  17 } from './peertube-player-local-storage'
  18
  19 const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
  20 class PeerTubePlugin extends Plugin {
  21   private readonly playerElement: HTMLVideoElement
  22
  23   private readonly autoplay: boolean = false
  24   private readonly startTime: number = 0
  25   private readonly savePlayerSrcFunction: Function
  26   private readonly videoFiles: VideoFile[]
  27   private readonly videoViewUrl: string
  28   private readonly videoDuration: number
  29   private readonly CONSTANTS = {
  30     INFO_SCHEDULER: 1000, // Don't change this
  31     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  32     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  33     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  34     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  35     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
  36   }
  37
  38   private readonly webtorrent = new WebTorrent({
  39     tracker: {
  40       rtcConfig: {
  41         iceServers: [
  42           {
  43             urls: 'stun:stun.stunprotocol.org'
  44           },
  45           {
  46             urls: 'stun:stun.framasoft.org'
  47           }
  48         ]
  49       }
  50     },
  51     dht: false
  52   })
  53
  54   private player: any
  55   private currentVideoFile: VideoFile
  56   private torrent: WebTorrent.Torrent
  57   private videoCaptions: VideoJSCaption[]
  58   private renderer
  59   private fakeRenderer
  60   private autoResolution = true
  61   private forbidAutoResolution = false
  62   private isAutoResolutionObservation = false
  63
  64   private videoViewInterval
  65   private torrentInfoInterval
  66   private autoQualityInterval
  67   private addTorrentDelay
  68   private qualityObservationTimer
  69   private runAutoQualitySchedulerTimer
  70
  71   private downloadSpeeds: number[] = []
  72
  73   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  74     super(player, options)
  75
  76     // Disable auto play on iOS
  77     this.autoplay = options.autoplay && this.isIOS() === false
  78
  79     this.startTime = timeToInt(options.startTime)
  80     this.videoFiles = options.videoFiles
  81     this.videoViewUrl = options.videoViewUrl
  82     this.videoDuration = options.videoDuration
  83     this.videoCaptions = options.videoCaptions
  84
  85     this.savePlayerSrcFunction = this.player.src
  86     // Hack to "simulate" src link in video.js >= 6
  87     // Without this, we can't play the video after pausing it
  88     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
  89     this.player.src = () => true
  90
  91     this.playerElement = options.playerElement
  92
  93     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
  94
  95     this.player.ready(() => {
  96       const volume = getStoredVolume()
  97       if (volume !== undefined) this.player.volume(volume)
  98       const muted = getStoredMute()
  99       if (muted !== undefined) this.player.muted(muted)
 100
 101       this.initializePlayer()
 102       this.runTorrentInfoScheduler()
 103       this.runViewAdd()
 104
 105       this.player.one('play', () => {
 106         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 107         this.runAutoQualitySchedulerTimer = setTimeout(() => {
 108           this.runAutoQualityScheduler()
 109         }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 110       })
 111     })
 112
 113     this.player.on('volumechange', () => {
 114       saveVolumeInStore(this.player.volume())
 115       saveMuteInStore(this.player.muted())
 116     })
 117   }
 118
 119   dispose () {
 120     clearTimeout(this.addTorrentDelay)
 121     clearTimeout(this.qualityObservationTimer)
 122     clearTimeout(this.runAutoQualitySchedulerTimer)
 123
 124     clearInterval(this.videoViewInterval)
 125     clearInterval(this.torrentInfoInterval)
 126     clearInterval(this.autoQualityInterval)
 127
 128     // Don't need to destroy renderer, video player will be destroyed
 129     this.flushVideoFile(this.currentVideoFile, false)
 130
 131     this.destroyFakeRenderer()
 132   }
 133
 134   getCurrentResolutionId () {
 135     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 136   }
 137
 138   getCurrentResolutionLabel () {
 139     if (!this.currentVideoFile) return ''
 140
 141     const fps = this.currentVideoFile.fps >= 50 ? this.currentVideoFile.fps : ''
 142     return this.currentVideoFile.resolution.label + fps
 143   }
 144
 145   updateVideoFile (
 146     videoFile?: VideoFile,
 147     options: {
 148       forcePlay?: boolean,
 149       seek?: number,
 150       delay?: number
 151     } = {},
 152     done: () => void = () => { /* empty */ }
 153   ) {
 154     // Automatically choose the adapted video file
 155     if (videoFile === undefined) {
 156       const savedAverageBandwidth = getAverageBandwidthInStore()
 157       videoFile = savedAverageBandwidth
 158         ? this.getAppropriateFile(savedAverageBandwidth)
 159         : this.pickAverageVideoFile()
 160     }
 161
 162     // Don't add the same video file once again
 163     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 164       return
 165     }
 166
 167     // Do not display error to user because we will have multiple fallback
 168     this.disableErrorDisplay()
 169
 170     this.player.src = () => true
 171     const oldPlaybackRate = this.player.playbackRate()
 172
 173     const previousVideoFile = this.currentVideoFile
 174     this.currentVideoFile = videoFile
 175
 176     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 177       this.player.playbackRate(oldPlaybackRate)
 178       return done()
 179     })
 180
 181     this.trigger('videoFileUpdate')
 182   }
 183
 184   addTorrent (
 185     magnetOrTorrentUrl: string,
 186     previousVideoFile: VideoFile,
 187     options: {
 188       forcePlay?: boolean,
 189       seek?: number,
 190       delay?: number
 191     },
 192     done: Function
 193   ) {
 194     console.log('Adding ' + magnetOrTorrentUrl + '.')
 195
 196     const oldTorrent = this.torrent
 197     const torrentOptions = {
 198       store: (chunkLength, storeOpts) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 199         max: 100
 200       })
 201     }
 202
 203     this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 204       console.log('Added ' + magnetOrTorrentUrl + '.')
 205
 206       if (oldTorrent) {
 207         // Pause the old torrent
 208         oldTorrent.pause()
 209         // Pause does not remove actual peers (in particular the webseed peer)
 210         oldTorrent.removePeer(oldTorrent['ws'])
 211
 212         // We use a fake renderer so we download correct pieces of the next file
 213         if (options.delay) {
 214           const fakeVideoElem = document.createElement('video')
 215           renderVideo(torrent.files[0], fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
 216             this.fakeRenderer = renderer
 217
 218             if (err) console.error('Cannot render new torrent in fake video element.', err)
 219
 220             // Load the future file at the correct time
 221             fakeVideoElem.currentTime = this.player.currentTime() + (options.delay / 2000)
 222           })
 223         }
 224       }
 225
 226       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 227       this.addTorrentDelay = setTimeout(() => {
 228         this.destroyFakeRenderer()
 229
 230         const paused = this.player.paused()
 231
 232         this.flushVideoFile(previousVideoFile)
 233
 234         const renderVideoOptions = { autoplay: false, controls: true }
 235         renderVideo(torrent.files[0], this.playerElement, renderVideoOptions,(err, renderer) => {
 236           this.renderer = renderer
 237
 238           if (err) return this.fallbackToHttp(done)
 239
 240           return this.tryToPlay(err => {
 241             if (err) return done(err)
 242
 243             if (options.seek) this.seek(options.seek)
 244             if (options.forcePlay === false && paused === true) this.player.pause()
 245
 246             return done(err)
 247           })
 248         })
 249       }, options.delay || 0)
 250     })
 251
 252     this.torrent.on('error', err => console.error(err))
 253
 254     this.torrent.on('warning', (err: any) => {
 255       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 256       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 257
 258       // Users don't care about issues with WebRTC, but developers do so log it in the console
 259       if (err.message.indexOf('Ice connection failed') !== -1) {
 260         console.log(err)
 261         return
 262       }
 263
 264       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 265       if (err.message.indexOf('incorrect info hash') !== -1) {
 266         console.error('Incorrect info hash detected, falling back to torrent file.')
 267         const newOptions = { forcePlay: true, seek: options.seek }
 268         return this.addTorrent(this.torrent['xs'], previousVideoFile, newOptions, done)
 269       }
 270
 271       return console.warn(err)
 272     })
 273   }
 274
 275   updateResolution (resolutionId: number, delay = 0) {
 276     // Remember player state
 277     const currentTime = this.player.currentTime()
 278     const isPaused = this.player.paused()
 279
 280     // Remove poster to have black background
 281     this.playerElement.poster = ''
 282
 283     // Hide bigPlayButton
 284     if (!isPaused) {
 285       this.player.bigPlayButton.hide()
 286     }
 287
 288     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 289     const options = {
 290       forcePlay: false,
 291       delay,
 292       seek: currentTime + (delay / 1000)
 293     }
 294     this.updateVideoFile(newVideoFile, options)
 295   }
 296
 297   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 298     if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
 299       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 300
 301       this.webtorrent.remove(videoFile.magnetUri)
 302       console.log('Removed ' + videoFile.magnetUri)
 303     }
 304   }
 305
 306   isAutoResolutionOn () {
 307     return this.autoResolution
 308   }
 309
 310   enableAutoResolution () {
 311     this.autoResolution = true
 312     this.trigger('autoResolutionUpdate')
 313   }
 314
 315   disableAutoResolution (forbid = false) {
 316     if (forbid === true) this.forbidAutoResolution = true
 317
 318     this.autoResolution = false
 319     this.trigger('autoResolutionUpdate')
 320   }
 321
 322   isAutoResolutionForbidden () {
 323     return this.forbidAutoResolution === true
 324   }
 325
 326   getCurrentVideoFile () {
 327     return this.currentVideoFile
 328   }
 329
 330   getTorrent () {
 331     return this.torrent
 332   }
 333
 334   private tryToPlay (done?: Function) {
 335     if (!done) done = function () { /* empty */ }
 336
 337     const playPromise = this.player.play()
 338     if (playPromise !== undefined) {
 339       return playPromise.then(done)
 340                         .catch(err => {
 341                           if (err.message.indexOf('The play() request was interrupted by a call to pause()') !== -1) {
 342                             return
 343                           }
 344
 345                           console.error(err)
 346                           this.player.pause()
 347                           this.player.posterImage.show()
 348                           this.player.removeClass('vjs-has-autoplay')
 349                           this.player.removeClass('vjs-has-big-play-button-clicked')
 350
 351                           return done()
 352                         })
 353     }
 354
 355     return done()
 356   }
 357
 358   private seek (time: number) {
 359     this.player.currentTime(time)
 360     this.player.handleTechSeeked_()
 361   }
 362
 363   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 364     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 365     if (this.videoFiles.length === 1) return this.videoFiles[0]
 366
 367     // Don't change the torrent is the play was ended
 368     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 369
 370     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 371
 372     // Limit resolution according to player height
 373     const playerHeight = this.playerElement.offsetHeight as number
 374
 375     // We take the first resolution just above the player height
 376     // Example: player height is 530px, we want the 720p file instead of 480p
 377     let maxResolution = this.videoFiles[0].resolution.id
 378     for (let i = this.videoFiles.length - 1; i >= 0; i--) {
 379       const resolutionId = this.videoFiles[i].resolution.id
 380       if (resolutionId >= playerHeight) {
 381         maxResolution = resolutionId
 382         break
 383       }
 384     }
 385
 386     // Filter videos we can play according to our screen resolution and bandwidth
 387     const filteredFiles = this.videoFiles
 388                               .filter(f => f.resolution.id <= maxResolution)
 389                               .filter(f => {
 390                                 const fileBitrate = (f.size / this.videoDuration)
 391                                 let threshold = fileBitrate
 392
 393                                 // If this is for a higher resolution or an initial load: add a margin
 394                                 if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 395                                   threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 396                                 }
 397
 398                                 return averageDownloadSpeed > threshold
 399                               })
 400
 401     // If the download speed is too bad, return the lowest resolution we have
 402     if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
 403
 404     return videoFileMaxByResolution(filteredFiles)
 405   }
 406
 407   private getAndSaveActualDownloadSpeed () {
 408     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 409     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 410     if (lastDownloadSpeeds.length === 0) return -1
 411
 412     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 413     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 414
 415     // Save the average bandwidth for future use
 416     saveAverageBandwidth(averageBandwidth)
 417
 418     return averageBandwidth
 419   }
 420
 421   private initializePlayer () {
 422     if (isMobile()) this.player.addClass('vjs-is-mobile')
 423
 424     this.initSmoothProgressBar()
 425
 426     this.initCaptions()
 427
 428     this.alterInactivity()
 429
 430     if (this.autoplay === true) {
 431       this.player.posterImage.hide()
 432
 433       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 434     } else {
 435       // Don't try on iOS that does not support MediaSource
 436       if (this.isIOS()) {
 437         this.currentVideoFile = this.pickAverageVideoFile()
 438         return this.fallbackToHttp(undefined, false)
 439       }
 440
 441       // Proxy first play
 442       const oldPlay = this.player.play.bind(this.player)
 443       this.player.play = () => {
 444         this.player.addClass('vjs-has-big-play-button-clicked')
 445         this.player.play = oldPlay
 446
 447         this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 448       }
 449     }
 450   }
 451
 452   private runAutoQualityScheduler () {
 453     this.autoQualityInterval = setInterval(() => {
 454
 455       // Not initialized or in HTTP fallback
 456       if (this.torrent === undefined || this.torrent === null) return
 457       if (this.isAutoResolutionOn() === false) return
 458       if (this.isAutoResolutionObservation === true) return
 459
 460       const file = this.getAppropriateFile()
 461       let changeResolution = false
 462       let changeResolutionDelay = 0
 463
 464       // Lower resolution
 465       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 466         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 467         changeResolution = true
 468       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 469         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 470         changeResolution = true
 471         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 472       }
 473
 474       if (changeResolution === true) {
 475         this.updateResolution(file.resolution.id, changeResolutionDelay)
 476
 477         // Wait some seconds in observation of our new resolution
 478         this.isAutoResolutionObservation = true
 479
 480         this.qualityObservationTimer = setTimeout(() => {
 481           this.isAutoResolutionObservation = false
 482         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 483       }
 484     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 485   }
 486
 487   private isPlayerWaiting () {
 488     return this.player && this.player.hasClass('vjs-waiting')
 489   }
 490
 491   private runTorrentInfoScheduler () {
 492     this.torrentInfoInterval = setInterval(() => {
 493       // Not initialized yet
 494       if (this.torrent === undefined) return
 495
 496       // Http fallback
 497       if (this.torrent === null) return this.trigger('torrentInfo', false)
 498
 499       // this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 500       if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
 501
 502       return this.trigger('torrentInfo', {
 503         downloadSpeed: this.torrent.downloadSpeed,
 504         numPeers: this.torrent.numPeers,
 505         uploadSpeed: this.torrent.uploadSpeed,
 506         downloaded: this.torrent.downloaded,
 507         uploaded: this.torrent.uploaded
 508       })
 509     }, this.CONSTANTS.INFO_SCHEDULER)
 510   }
 511
 512   private runViewAdd () {
 513     this.clearVideoViewInterval()
 514
 515     // After 30 seconds (or 3/4 of the video), add a view to the video
 516     let minSecondsToView = 30
 517
 518     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 519
 520     let secondsViewed = 0
 521     this.videoViewInterval = setInterval(() => {
 522       if (this.player && !this.player.paused()) {
 523         secondsViewed += 1
 524
 525         if (secondsViewed > minSecondsToView) {
 526           this.clearVideoViewInterval()
 527
 528           this.addViewToVideo().catch(err => console.error(err))
 529         }
 530       }
 531     }, 1000)
 532   }
 533
 534   private clearVideoViewInterval () {
 535     if (this.videoViewInterval !== undefined) {
 536       clearInterval(this.videoViewInterval)
 537       this.videoViewInterval = undefined
 538     }
 539   }
 540
 541   private addViewToVideo () {
 542     if (!this.videoViewUrl) return Promise.resolve(undefined)
 543
 544     return fetch(this.videoViewUrl, { method: 'POST' })
 545   }
 546
 547   private fallbackToHttp (done?: Function, play = true) {
 548     this.disableAutoResolution(true)
 549
 550     this.flushVideoFile(this.currentVideoFile, true)
 551     this.torrent = null
 552
 553     // Enable error display now this is our last fallback
 554     this.player.one('error', () => this.enableErrorDisplay())
 555
 556     const httpUrl = this.currentVideoFile.fileUrl
 557     this.player.src = this.savePlayerSrcFunction
 558     this.player.src(httpUrl)
 559     if (play) this.tryToPlay()
 560
 561     if (done) return done()
 562   }
 563
 564   private handleError (err: Error | string) {
 565     return this.player.trigger('customError', { err })
 566   }
 567
 568   private enableErrorDisplay () {
 569     this.player.addClass('vjs-error-display-enabled')
 570   }
 571
 572   private disableErrorDisplay () {
 573     this.player.removeClass('vjs-error-display-enabled')
 574   }
 575
 576   private isIOS () {
 577     return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
 578   }
 579
 580   private alterInactivity () {
 581     let saveInactivityTimeout: number
 582
 583     const disableInactivity = () => {
 584       saveInactivityTimeout = this.player.options_.inactivityTimeout
 585       this.player.options_.inactivityTimeout = 0
 586     }
 587     const enableInactivity = () => {
 588       // this.player.options_.inactivityTimeout = saveInactivityTimeout
 589     }
 590
 591     const settingsDialog = this.player.children_.find(c => c.name_ === 'SettingsDialog')
 592
 593     this.player.controlBar.on('mouseenter', () => disableInactivity())
 594     settingsDialog.on('mouseenter', () => disableInactivity())
 595     this.player.controlBar.on('mouseleave', () => enableInactivity())
 596     settingsDialog.on('mouseleave', () => enableInactivity())
 597   }
 598
 599   private pickAverageVideoFile () {
 600     if (this.videoFiles.length === 1) return this.videoFiles[0]
 601
 602     return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
 603   }
 604
 605   private destroyFakeRenderer () {
 606     if (this.fakeRenderer) {
 607       if (this.fakeRenderer.destroy) {
 608         try {
 609           this.fakeRenderer.destroy()
 610         } catch (err) {
 611           console.log('Cannot destroy correctly fake renderer.', err)
 612         }
 613       }
 614       this.fakeRenderer = undefined
 615     }
 616   }
 617
 618   private initCaptions () {
 619     for (const caption of this.videoCaptions) {
 620       this.player.addRemoteTextTrack({
 621         kind: 'captions',
 622         label: caption.label,
 623         language: caption.language,
 624         id: caption.language,
 625         src: caption.src
 626       }, false)
 627     }
 628   }
 629
 630   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 631   private initSmoothProgressBar () {
 632     const SeekBar = videojsUntyped.getComponent('SeekBar')
 633     SeekBar.prototype.getPercent = function getPercent () {
 634       // Allows for smooth scrubbing, when player can't keep up.
 635       // const time = (this.player_.scrubbing()) ?
 636       //   this.player_.getCache().currentTime :
 637       //   this.player_.currentTime()
 638       const time = this.player_.currentTime()
 639       const percent = time / this.player_.duration()
 640       return percent >= 1 ? 1 : percent
 641     }
 642     SeekBar.prototype.handleMouseMove = function handleMouseMove (event) {
 643       let newTime = this.calculateDistance(event) * this.player_.duration()
 644       if (newTime === this.player_.duration()) {
 645         newTime = newTime - 0.1
 646       }
 647       this.player_.currentTime(newTime)
 648       this.update()
 649     }
 650   }
 651 }
 652
 653 videojs.registerPlugin('peertube', PeerTubePlugin)
 654 export { PeerTubePlugin }