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

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