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

   1 // FIXME: something weird with our path definition in tsconfig and typings
   2 // @ts-ignore
   3 import * as videojs from 'video.js'
   4
   5 import * as WebTorrent from 'webtorrent'
   6 import { VideoFile } from '../../../../shared/models/videos/video.model'
   7 import { renderVideo } from './video-renderer'
   8 import './settings-menu-button'
   9 import { PeertubePluginOptions, UserWatching, VideoJSCaption, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
  10 import { isMobile, timeToInt, videoFileMaxByResolution, videoFileMinByResolution } from './utils'
  11 import { PeertubeChunkStore } from './peertube-chunk-store'
  12 import {
  13   getAverageBandwidthInStore,
  14   getStoredLastSubtitle,
  15   getStoredMute,
  16   getStoredVolume,
  17   getStoredWebTorrentEnabled,
  18   saveAverageBandwidth,
  19   saveLastSubtitle,
  20   saveMuteInStore,
  21   saveVolumeInStore
  22 } from './peertube-player-local-storage'
  23
  24 const CacheChunkStore = require('cache-chunk-store')
  25
  26 type PlayOptions = {
  27   forcePlay?: boolean,
  28   seek?: number,
  29   delay?: number
  30 }
  31
  32 const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
  33 class PeerTubePlugin extends Plugin {
  34   private readonly playerElement: HTMLVideoElement
  35
  36   private readonly autoplay: boolean = false
  37   private readonly startTime: number = 0
  38   private readonly savePlayerSrcFunction: Function
  39   private readonly videoFiles: VideoFile[]
  40   private readonly videoViewUrl: string
  41   private readonly videoDuration: number
  42   private readonly CONSTANTS = {
  43     INFO_SCHEDULER: 1000, // Don't change this
  44     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  45     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  46     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  47     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  48     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5, // Last 5 seconds to build average bandwidth
  49     USER_WATCHING_VIDEO_INTERVAL: 5000 // Every 5 seconds, notify the user is watching the video
  50   }
  51
  52   private readonly webtorrent = new WebTorrent({
  53     tracker: {
  54       rtcConfig: {
  55         iceServers: [
  56           {
  57             urls: 'stun:stun.stunprotocol.org'
  58           },
  59           {
  60             urls: 'stun:stun.framasoft.org'
  61           }
  62         ]
  63       }
  64     },
  65     dht: false
  66   })
  67
  68   private player: any
  69   private currentVideoFile: VideoFile
  70   private torrent: WebTorrent.Torrent
  71   private videoCaptions: VideoJSCaption[]
  72   private defaultSubtitle: string
  73
  74   private renderer: any
  75   private fakeRenderer: any
  76   private destroyingFakeRenderer = false
  77
  78   private autoResolution = true
  79   private forbidAutoResolution = false
  80   private isAutoResolutionObservation = false
  81   private playerRefusedP2P = false
  82
  83   private videoViewInterval: any
  84   private torrentInfoInterval: any
  85   private autoQualityInterval: any
  86   private userWatchingVideoInterval: any
  87   private addTorrentDelay: any
  88   private qualityObservationTimer: any
  89   private runAutoQualitySchedulerTimer: any
  90
  91   private downloadSpeeds: number[] = []
  92
  93   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  94     super(player, options)
  95
  96     // Disable auto play on iOS
  97     this.autoplay = options.autoplay && this.isIOS() === false
  98     this.playerRefusedP2P = !getStoredWebTorrentEnabled()
  99
 100     this.startTime = timeToInt(options.startTime)
 101     this.videoFiles = options.videoFiles
 102     this.videoViewUrl = options.videoViewUrl
 103     this.videoDuration = options.videoDuration
 104     this.videoCaptions = options.videoCaptions
 105
 106     this.savePlayerSrcFunction = this.player.src
 107     this.playerElement = options.playerElement
 108
 109     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
 110
 111     this.player.ready(() => {
 112       const playerOptions = this.player.options_
 113
 114       const volume = getStoredVolume()
 115       if (volume !== undefined) this.player.volume(volume)
 116
 117       const muted = playerOptions.muted !== undefined ? playerOptions.muted : getStoredMute()
 118       if (muted !== undefined) this.player.muted(muted)
 119
 120       this.defaultSubtitle = options.subtitle || getStoredLastSubtitle()
 121
 122       this.player.on('volumechange', () => {
 123         saveVolumeInStore(this.player.volume())
 124         saveMuteInStore(this.player.muted())
 125       })
 126
 127       this.player.textTracks().on('change', () => {
 128         const showing = this.player.textTracks().tracks_.find((t: { kind: string, mode: string }) => {
 129           return t.kind === 'captions' && t.mode === 'showing'
 130         })
 131
 132         if (!showing) {
 133           saveLastSubtitle('off')
 134           return
 135         }
 136
 137         saveLastSubtitle(showing.language)
 138       })
 139
 140       this.player.duration(options.videoDuration)
 141
 142       this.initializePlayer()
 143       this.runTorrentInfoScheduler()
 144       this.runViewAdd()
 145
 146       if (options.userWatching) this.runUserWatchVideo(options.userWatching)
 147
 148       this.player.one('play', () => {
 149         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 150         this.runAutoQualitySchedulerTimer = setTimeout(() => this.runAutoQualityScheduler(), this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 151       })
 152     })
 153   }
 154
 155   dispose () {
 156     clearTimeout(this.addTorrentDelay)
 157     clearTimeout(this.qualityObservationTimer)
 158     clearTimeout(this.runAutoQualitySchedulerTimer)
 159
 160     clearInterval(this.videoViewInterval)
 161     clearInterval(this.torrentInfoInterval)
 162     clearInterval(this.autoQualityInterval)
 163
 164     if (this.userWatchingVideoInterval) clearInterval(this.userWatchingVideoInterval)
 165
 166     // Don't need to destroy renderer, video player will be destroyed
 167     this.flushVideoFile(this.currentVideoFile, false)
 168
 169     this.destroyFakeRenderer()
 170   }
 171
 172   getCurrentResolutionId () {
 173     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 174   }
 175
 176   getCurrentResolutionLabel () {
 177     if (!this.currentVideoFile) return ''
 178
 179     const fps = this.currentVideoFile.fps >= 50 ? this.currentVideoFile.fps : ''
 180     return this.currentVideoFile.resolution.label + fps
 181   }
 182
 183   updateVideoFile (
 184     videoFile?: VideoFile,
 185     options: {
 186       forcePlay?: boolean,
 187       seek?: number,
 188       delay?: number
 189     } = {},
 190     done: () => void = () => { /* empty */ }
 191   ) {
 192     // Automatically choose the adapted video file
 193     if (videoFile === undefined) {
 194       const savedAverageBandwidth = getAverageBandwidthInStore()
 195       videoFile = savedAverageBandwidth
 196         ? this.getAppropriateFile(savedAverageBandwidth)
 197         : this.pickAverageVideoFile()
 198     }
 199
 200     // Don't add the same video file once again
 201     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 202       return
 203     }
 204
 205     // Do not display error to user because we will have multiple fallback
 206     this.disableErrorDisplay()
 207
 208     // Hack to "simulate" src link in video.js >= 6
 209     // Without this, we can't play the video after pausing it
 210     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
 211     this.player.src = () => true
 212     const oldPlaybackRate = this.player.playbackRate()
 213
 214     const previousVideoFile = this.currentVideoFile
 215     this.currentVideoFile = videoFile
 216
 217     // Don't try on iOS that does not support MediaSource
 218     // Or don't use P2P if webtorrent is disabled
 219     if (this.isIOS() || this.playerRefusedP2P) {
 220       return this.fallbackToHttp(options, () => {
 221         this.player.playbackRate(oldPlaybackRate)
 222         return done()
 223       })
 224     }
 225
 226     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 227       this.player.playbackRate(oldPlaybackRate)
 228       return done()
 229     })
 230
 231     this.trigger('videoFileUpdate')
 232   }
 233
 234   updateResolution (resolutionId: number, delay = 0) {
 235     // Remember player state
 236     const currentTime = this.player.currentTime()
 237     const isPaused = this.player.paused()
 238
 239     // Remove poster to have black background
 240     this.playerElement.poster = ''
 241
 242     // Hide bigPlayButton
 243     if (!isPaused) {
 244       this.player.bigPlayButton.hide()
 245     }
 246
 247     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 248     const options = {
 249       forcePlay: false,
 250       delay,
 251       seek: currentTime + (delay / 1000)
 252     }
 253     this.updateVideoFile(newVideoFile, options)
 254   }
 255
 256   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 257     if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
 258       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 259
 260       this.webtorrent.remove(videoFile.magnetUri)
 261       console.log('Removed ' + videoFile.magnetUri)
 262     }
 263   }
 264
 265   isAutoResolutionOn () {
 266     return this.autoResolution
 267   }
 268
 269   enableAutoResolution () {
 270     this.autoResolution = true
 271     this.trigger('autoResolutionUpdate')
 272   }
 273
 274   disableAutoResolution (forbid = false) {
 275     if (forbid === true) this.forbidAutoResolution = true
 276
 277     this.autoResolution = false
 278     this.trigger('autoResolutionUpdate')
 279   }
 280
 281   isAutoResolutionForbidden () {
 282     return this.forbidAutoResolution === true
 283   }
 284
 285   getCurrentVideoFile () {
 286     return this.currentVideoFile
 287   }
 288
 289   getTorrent () {
 290     return this.torrent
 291   }
 292
 293   private addTorrent (
 294     magnetOrTorrentUrl: string,
 295     previousVideoFile: VideoFile,
 296     options: PlayOptions,
 297     done: Function
 298   ) {
 299     console.log('Adding ' + magnetOrTorrentUrl + '.')
 300
 301     const oldTorrent = this.torrent
 302     const torrentOptions = {
 303       store: (chunkLength: number, storeOpts: any) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 304         max: 100
 305       })
 306     }
 307
 308     this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 309       console.log('Added ' + magnetOrTorrentUrl + '.')
 310
 311       if (oldTorrent) {
 312         // Pause the old torrent
 313         this.stopTorrent(oldTorrent)
 314
 315         // We use a fake renderer so we download correct pieces of the next file
 316         if (options.delay) this.renderFileInFakeElement(torrent.files[ 0 ], options.delay)
 317       }
 318
 319       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 320       this.addTorrentDelay = setTimeout(() => {
 321         // We don't need the fake renderer anymore
 322         this.destroyFakeRenderer()
 323
 324         const paused = this.player.paused()
 325
 326         this.flushVideoFile(previousVideoFile)
 327
 328         // Update progress bar (just for the UI), do not wait rendering
 329         if (options.seek) this.player.currentTime(options.seek)
 330
 331         const renderVideoOptions = { autoplay: false, controls: true }
 332         renderVideo(torrent.files[ 0 ], this.playerElement, renderVideoOptions, (err, renderer) => {
 333           this.renderer = renderer
 334
 335           if (err) return this.fallbackToHttp(options, done)
 336
 337           return this.tryToPlay(err => {
 338             if (err) return done(err)
 339
 340             if (options.seek) this.seek(options.seek)
 341             if (options.forcePlay === false && paused === true) this.player.pause()
 342
 343             return done()
 344           })
 345         })
 346       }, options.delay || 0)
 347     })
 348
 349     this.torrent.on('error', (err: any) => console.error(err))
 350
 351     this.torrent.on('warning', (err: any) => {
 352       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 353       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 354
 355       // Users don't care about issues with WebRTC, but developers do so log it in the console
 356       if (err.message.indexOf('Ice connection failed') !== -1) {
 357         console.log(err)
 358         return
 359       }
 360
 361       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 362       if (err.message.indexOf('incorrect info hash') !== -1) {
 363         console.error('Incorrect info hash detected, falling back to torrent file.')
 364         const newOptions = { forcePlay: true, seek: options.seek }
 365         return this.addTorrent(this.torrent[ 'xs' ], previousVideoFile, newOptions, done)
 366       }
 367
 368       // Remote instance is down
 369       if (err.message.indexOf('from xs param') !== -1) {
 370         this.handleError(err)
 371       }
 372
 373       console.warn(err)
 374     })
 375   }
 376
 377   private tryToPlay (done?: (err?: Error) => void) {
 378     if (!done) done = function () { /* empty */ }
 379
 380     const playPromise = this.player.play()
 381     if (playPromise !== undefined) {
 382       return playPromise.then(done)
 383                         .catch((err: Error) => {
 384                           if (err.message.indexOf('The play() request was interrupted by a call to pause()') !== -1) {
 385                             return
 386                           }
 387
 388                           console.error(err)
 389                           this.player.pause()
 390                           this.player.posterImage.show()
 391                           this.player.removeClass('vjs-has-autoplay')
 392                           this.player.removeClass('vjs-has-big-play-button-clicked')
 393
 394                           return done()
 395                         })
 396     }
 397
 398     return done()
 399   }
 400
 401   private seek (time: number) {
 402     this.player.currentTime(time)
 403     this.player.handleTechSeeked_()
 404   }
 405
 406   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 407     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 408     if (this.videoFiles.length === 1) return this.videoFiles[0]
 409
 410     // Don't change the torrent is the play was ended
 411     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 412
 413     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 414
 415     // Limit resolution according to player height
 416     const playerHeight = this.playerElement.offsetHeight as number
 417
 418     // We take the first resolution just above the player height
 419     // Example: player height is 530px, we want the 720p file instead of 480p
 420     let maxResolution = this.videoFiles[0].resolution.id
 421     for (let i = this.videoFiles.length - 1; i >= 0; i--) {
 422       const resolutionId = this.videoFiles[i].resolution.id
 423       if (resolutionId >= playerHeight) {
 424         maxResolution = resolutionId
 425         break
 426       }
 427     }
 428
 429     // Filter videos we can play according to our screen resolution and bandwidth
 430     const filteredFiles = this.videoFiles
 431                               .filter(f => f.resolution.id <= maxResolution)
 432                               .filter(f => {
 433                                 const fileBitrate = (f.size / this.videoDuration)
 434                                 let threshold = fileBitrate
 435
 436                                 // If this is for a higher resolution or an initial load: add a margin
 437                                 if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 438                                   threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 439                                 }
 440
 441                                 return averageDownloadSpeed > threshold
 442                               })
 443
 444     // If the download speed is too bad, return the lowest resolution we have
 445     if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
 446
 447     return videoFileMaxByResolution(filteredFiles)
 448   }
 449
 450   private getAndSaveActualDownloadSpeed () {
 451     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 452     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 453     if (lastDownloadSpeeds.length === 0) return -1
 454
 455     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 456     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 457
 458     // Save the average bandwidth for future use
 459     saveAverageBandwidth(averageBandwidth)
 460
 461     return averageBandwidth
 462   }
 463
 464   private initializePlayer () {
 465     if (isMobile()) this.player.addClass('vjs-is-mobile')
 466
 467     this.initSmoothProgressBar()
 468
 469     this.initCaptions()
 470
 471     this.alterInactivity()
 472
 473     if (this.autoplay === true) {
 474       this.player.posterImage.hide()
 475
 476       return this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 477     }
 478
 479     // Proxy first play
 480     const oldPlay = this.player.play.bind(this.player)
 481     this.player.play = () => {
 482       this.player.addClass('vjs-has-big-play-button-clicked')
 483       this.player.play = oldPlay
 484
 485       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 486     }
 487   }
 488
 489   private runAutoQualityScheduler () {
 490     this.autoQualityInterval = setInterval(() => {
 491
 492       // Not initialized or in HTTP fallback
 493       if (this.torrent === undefined || this.torrent === null) return
 494       if (this.isAutoResolutionOn() === false) return
 495       if (this.isAutoResolutionObservation === true) return
 496
 497       const file = this.getAppropriateFile()
 498       let changeResolution = false
 499       let changeResolutionDelay = 0
 500
 501       // Lower resolution
 502       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 503         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 504         changeResolution = true
 505       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 506         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 507         changeResolution = true
 508         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 509       }
 510
 511       if (changeResolution === true) {
 512         this.updateResolution(file.resolution.id, changeResolutionDelay)
 513
 514         // Wait some seconds in observation of our new resolution
 515         this.isAutoResolutionObservation = true
 516
 517         this.qualityObservationTimer = setTimeout(() => {
 518           this.isAutoResolutionObservation = false
 519         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 520       }
 521     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 522   }
 523
 524   private isPlayerWaiting () {
 525     return this.player && this.player.hasClass('vjs-waiting')
 526   }
 527
 528   private runTorrentInfoScheduler () {
 529     this.torrentInfoInterval = setInterval(() => {
 530       // Not initialized yet
 531       if (this.torrent === undefined) return
 532
 533       // Http fallback
 534       if (this.torrent === null) return this.trigger('torrentInfo', false)
 535
 536       // this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 537       if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
 538
 539       return this.trigger('torrentInfo', {
 540         downloadSpeed: this.torrent.downloadSpeed,
 541         numPeers: this.torrent.numPeers,
 542         uploadSpeed: this.torrent.uploadSpeed,
 543         downloaded: this.torrent.downloaded,
 544         uploaded: this.torrent.uploaded
 545       })
 546     }, this.CONSTANTS.INFO_SCHEDULER)
 547   }
 548
 549   private runViewAdd () {
 550     this.clearVideoViewInterval()
 551
 552     // After 30 seconds (or 3/4 of the video), add a view to the video
 553     let minSecondsToView = 30
 554
 555     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 556
 557     let secondsViewed = 0
 558     this.videoViewInterval = setInterval(() => {
 559       if (this.player && !this.player.paused()) {
 560         secondsViewed += 1
 561
 562         if (secondsViewed > minSecondsToView) {
 563           this.clearVideoViewInterval()
 564
 565           this.addViewToVideo().catch(err => console.error(err))
 566         }
 567       }
 568     }, 1000)
 569   }
 570
 571   private runUserWatchVideo (options: UserWatching) {
 572     let lastCurrentTime = 0
 573
 574     this.userWatchingVideoInterval = setInterval(() => {
 575       const currentTime = Math.floor(this.player.currentTime())
 576
 577       if (currentTime - lastCurrentTime >= 1) {
 578         lastCurrentTime = currentTime
 579
 580         this.notifyUserIsWatching(currentTime, options.url, options.authorizationHeader)
 581           .catch(err => console.error('Cannot notify user is watching.', err))
 582       }
 583     }, this.CONSTANTS.USER_WATCHING_VIDEO_INTERVAL)
 584   }
 585
 586   private clearVideoViewInterval () {
 587     if (this.videoViewInterval !== undefined) {
 588       clearInterval(this.videoViewInterval)
 589       this.videoViewInterval = undefined
 590     }
 591   }
 592
 593   private addViewToVideo () {
 594     if (!this.videoViewUrl) return Promise.resolve(undefined)
 595
 596     return fetch(this.videoViewUrl, { method: 'POST' })
 597   }
 598
 599   private notifyUserIsWatching (currentTime: number, url: string, authorizationHeader: string) {
 600     const body = new URLSearchParams()
 601     body.append('currentTime', currentTime.toString())
 602
 603     const headers = new Headers({ 'Authorization': authorizationHeader })
 604
 605     return fetch(url, { method: 'PUT', body, headers })
 606   }
 607
 608   private fallbackToHttp (options: PlayOptions, done?: Function) {
 609     const paused = this.player.paused()
 610
 611     this.disableAutoResolution(true)
 612
 613     this.flushVideoFile(this.currentVideoFile, true)
 614     this.torrent = null
 615
 616     // Enable error display now this is our last fallback
 617     this.player.one('error', () => this.enableErrorDisplay())
 618
 619     const httpUrl = this.currentVideoFile.fileUrl
 620     this.player.src = this.savePlayerSrcFunction
 621     this.player.src(httpUrl)
 622
 623     return this.tryToPlay(err => {
 624       if (err && done) return done(err)
 625
 626       if (options.seek) this.seek(options.seek)
 627       if (options.forcePlay === false && paused === true) this.player.pause()
 628
 629       if (done) return done()
 630     })
 631   }
 632
 633   private handleError (err: Error | string) {
 634     return this.player.trigger('customError', { err })
 635   }
 636
 637   private enableErrorDisplay () {
 638     this.player.addClass('vjs-error-display-enabled')
 639   }
 640
 641   private disableErrorDisplay () {
 642     this.player.removeClass('vjs-error-display-enabled')
 643   }
 644
 645   private isIOS () {
 646     return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
 647   }
 648
 649   private alterInactivity () {
 650     let saveInactivityTimeout: number
 651
 652     const disableInactivity = () => {
 653       saveInactivityTimeout = this.player.options_.inactivityTimeout
 654       this.player.options_.inactivityTimeout = 0
 655     }
 656     const enableInactivity = () => {
 657       this.player.options_.inactivityTimeout = saveInactivityTimeout
 658     }
 659
 660     const settingsDialog = this.player.children_.find((c: any) => c.name_ === 'SettingsDialog')
 661
 662     this.player.controlBar.on('mouseenter', () => disableInactivity())
 663     settingsDialog.on('mouseenter', () => disableInactivity())
 664     this.player.controlBar.on('mouseleave', () => enableInactivity())
 665     settingsDialog.on('mouseleave', () => enableInactivity())
 666   }
 667
 668   private pickAverageVideoFile () {
 669     if (this.videoFiles.length === 1) return this.videoFiles[0]
 670
 671     return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
 672   }
 673
 674   private stopTorrent (torrent: WebTorrent.Torrent) {
 675     torrent.pause()
 676     // Pause does not remove actual peers (in particular the webseed peer)
 677     torrent.removePeer(torrent[ 'ws' ])
 678   }
 679
 680   private renderFileInFakeElement (file: WebTorrent.TorrentFile, delay: number) {
 681     this.destroyingFakeRenderer = false
 682
 683     const fakeVideoElem = document.createElement('video')
 684     renderVideo(file, fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
 685       this.fakeRenderer = renderer
 686
 687       // The renderer returns an error when we destroy it, so skip them
 688       if (this.destroyingFakeRenderer === false && err) {
 689         console.error('Cannot render new torrent in fake video element.', err)
 690       }
 691
 692       // Load the future file at the correct time (in delay MS - 2 seconds)
 693       fakeVideoElem.currentTime = this.player.currentTime() + (delay - 2000)
 694     })
 695   }
 696
 697   private destroyFakeRenderer () {
 698     if (this.fakeRenderer) {
 699       this.destroyingFakeRenderer = true
 700
 701       if (this.fakeRenderer.destroy) {
 702         try {
 703           this.fakeRenderer.destroy()
 704         } catch (err) {
 705           console.log('Cannot destroy correctly fake renderer.', err)
 706         }
 707       }
 708       this.fakeRenderer = undefined
 709     }
 710   }
 711
 712   private initCaptions () {
 713     for (const caption of this.videoCaptions) {
 714       this.player.addRemoteTextTrack({
 715         kind: 'captions',
 716         label: caption.label,
 717         language: caption.language,
 718         id: caption.language,
 719         src: caption.src,
 720         default: this.defaultSubtitle === caption.language
 721       }, false)
 722     }
 723   }
 724
 725   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 726   private initSmoothProgressBar () {
 727     const SeekBar = videojsUntyped.getComponent('SeekBar')
 728     SeekBar.prototype.getPercent = function getPercent () {
 729       // Allows for smooth scrubbing, when player can't keep up.
 730       // const time = (this.player_.scrubbing()) ?
 731       //   this.player_.getCache().currentTime :
 732       //   this.player_.currentTime()
 733       const time = this.player_.currentTime()
 734       const percent = time / this.player_.duration()
 735       return percent >= 1 ? 1 : percent
 736     }
 737     SeekBar.prototype.handleMouseMove = function handleMouseMove (event: any) {
 738       let newTime = this.calculateDistance(event) * this.player_.duration()
 739       if (newTime === this.player_.duration()) {
 740         newTime = newTime - 0.1
 741       }
 742       this.player_.currentTime(newTime)
 743       this.update()
 744     }
 745   }
 746 }
 747
 748 videojs.registerPlugin('peertube', PeerTubePlugin)
 749 export { PeerTubePlugin }