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

   1 // Big thanks to: https://github.com/kmoskwiak/videojs-resolution-switcher
   2
   3 import * as videojs from 'video.js'
   4 import * as WebTorrent from 'webtorrent'
   5 import { VideoFile } from '../../../../shared/models/videos/video.model'
   6 import { renderVideo } from './video-renderer'
   7
   8 declare module 'video.js' {
   9   interface Player {
  10     peertube (): PeerTubePlugin
  11   }
  12 }
  13
  14 interface VideoJSComponentInterface {
  15   _player: videojs.Player
  16
  17   new (player: videojs.Player, options?: any)
  18
  19   registerComponent (name: string, obj: any)
  20 }
  21
  22 type PeertubePluginOptions = {
  23   videoFiles: VideoFile[]
  24   playerElement: HTMLVideoElement
  25   peerTubeLink: boolean
  26   videoViewUrl: string
  27   videoDuration: number
  28 }
  29
  30 // https://github.com/danrevah/ngx-pipes/blob/master/src/pipes/math/bytes.ts
  31 // Don't import all Angular stuff, just copy the code with shame
  32 const dictionaryBytes: Array<{max: number, type: string}> = [
  33   { max: 1024, type: 'B' },
  34   { max: 1048576, type: 'KB' },
  35   { max: 1073741824, type: 'MB' },
  36   { max: 1.0995116e12, type: 'GB' }
  37 ]
  38 function bytes (value) {
  39   const format = dictionaryBytes.find(d => value < d.max) || dictionaryBytes[dictionaryBytes.length - 1]
  40   const calc = Math.floor(value / (format.max / 1024)).toString()
  41
  42   return [ calc, format.type ]
  43 }
  44
  45 // videojs typings don't have some method we need
  46 const videojsUntyped = videojs as any
  47 const webtorrent = new WebTorrent({ dht: false })
  48
  49 const MenuItem: VideoJSComponentInterface = videojsUntyped.getComponent('MenuItem')
  50 class ResolutionMenuItem extends MenuItem {
  51
  52   constructor (player: videojs.Player, options) {
  53     options.selectable = true
  54     super(player, options)
  55
  56     const currentResolution = this.player_.peertube().getCurrentResolution()
  57     this.selected(this.options_.id === currentResolution)
  58   }
  59
  60   handleClick (event) {
  61     super.handleClick(event)
  62
  63     this.player_.peertube().updateResolution(this.options_.id)
  64   }
  65 }
  66 MenuItem.registerComponent('ResolutionMenuItem', ResolutionMenuItem)
  67
  68 const MenuButton: VideoJSComponentInterface = videojsUntyped.getComponent('MenuButton')
  69 class ResolutionMenuButton extends MenuButton {
  70   label: HTMLElement
  71
  72   constructor (player: videojs.Player, options) {
  73     options.label = 'Quality'
  74     super(player, options)
  75
  76     this.label = document.createElement('span')
  77
  78     this.el().setAttribute('aria-label', 'Quality')
  79     this.controlText('Quality')
  80
  81     videojsUntyped.dom.addClass(this.label, 'vjs-resolution-button-label')
  82     this.el().appendChild(this.label)
  83
  84     player.peertube().on('videoFileUpdate', () => this.update())
  85   }
  86
  87   createItems () {
  88     const menuItems = []
  89     for (const videoFile of this.player_.peertube().videoFiles) {
  90       menuItems.push(new ResolutionMenuItem(
  91         this.player_,
  92         {
  93           id: videoFile.resolution,
  94           label: videoFile.resolutionLabel,
  95           src: videoFile.magnetUri,
  96           selected: videoFile.resolution === this.currentSelection
  97         })
  98       )
  99     }
 100
 101     return menuItems
 102   }
 103
 104   update () {
 105     if (!this.label) return
 106
 107     this.label.innerHTML = this.player_.peertube().getCurrentResolutionLabel()
 108     this.hide()
 109     return super.update()
 110   }
 111
 112   buildCSSClass () {
 113     return super.buildCSSClass() + ' vjs-resolution-button'
 114   }
 115
 116   dispose () {
 117     this.parentNode.removeChild(this)
 118   }
 119 }
 120 MenuButton.registerComponent('ResolutionMenuButton', ResolutionMenuButton)
 121
 122 const Button: VideoJSComponentInterface = videojsUntyped.getComponent('Button')
 123 class PeertubeLinkButton extends Button {
 124
 125   createEl () {
 126     const link = document.createElement('a')
 127     link.href = window.location.href.replace('embed', 'watch')
 128     link.innerHTML = 'PeerTube'
 129     link.title = 'Go to the video page'
 130     link.className = 'vjs-peertube-link'
 131     link.target = '_blank'
 132
 133     return link
 134   }
 135
 136   handleClick () {
 137     this.player_.pause()
 138   }
 139
 140   dispose () {
 141     this.parentNode.removeChild(this)
 142   }
 143 }
 144 Button.registerComponent('PeerTubeLinkButton', PeertubeLinkButton)
 145
 146 class WebTorrentButton extends Button {
 147   createEl () {
 148     const div = document.createElement('div')
 149     const subDivWebtorrent = document.createElement('div')
 150     div.appendChild(subDivWebtorrent)
 151
 152     const downloadIcon = document.createElement('span')
 153     downloadIcon.classList.add('icon', 'icon-download')
 154     subDivWebtorrent.appendChild(downloadIcon)
 155
 156     const downloadSpeedText = document.createElement('span')
 157     downloadSpeedText.classList.add('download-speed-text')
 158     const downloadSpeedNumber = document.createElement('span')
 159     downloadSpeedNumber.classList.add('download-speed-number')
 160     const downloadSpeedUnit = document.createElement('span')
 161     downloadSpeedText.appendChild(downloadSpeedNumber)
 162     downloadSpeedText.appendChild(downloadSpeedUnit)
 163     subDivWebtorrent.appendChild(downloadSpeedText)
 164
 165     const uploadIcon = document.createElement('span')
 166     uploadIcon.classList.add('icon', 'icon-upload')
 167     subDivWebtorrent.appendChild(uploadIcon)
 168
 169     const uploadSpeedText = document.createElement('span')
 170     uploadSpeedText.classList.add('upload-speed-text')
 171     const uploadSpeedNumber = document.createElement('span')
 172     uploadSpeedNumber.classList.add('upload-speed-number')
 173     const uploadSpeedUnit = document.createElement('span')
 174     uploadSpeedText.appendChild(uploadSpeedNumber)
 175     uploadSpeedText.appendChild(uploadSpeedUnit)
 176     subDivWebtorrent.appendChild(uploadSpeedText)
 177
 178     const peersText = document.createElement('span')
 179     peersText.classList.add('peers-text')
 180     const peersNumber = document.createElement('span')
 181     peersNumber.classList.add('peers-number')
 182     subDivWebtorrent.appendChild(peersNumber)
 183     subDivWebtorrent.appendChild(peersText)
 184
 185     div.className = 'vjs-peertube'
 186     // Hide the stats before we get the info
 187     subDivWebtorrent.className = 'vjs-peertube-hidden'
 188
 189     const subDivHttp = document.createElement('div')
 190     subDivHttp.className = 'vjs-peertube-hidden'
 191     const subDivHttpText = document.createElement('span')
 192     subDivHttpText.classList.add('peers-number')
 193     subDivHttpText.textContent = 'HTTP'
 194     const subDivFallbackText = document.createElement('span')
 195     subDivFallbackText.classList.add('peers-text')
 196     subDivFallbackText.textContent = ' fallback'
 197
 198     subDivHttp.appendChild(subDivHttpText)
 199     subDivHttp.appendChild(subDivFallbackText)
 200     div.appendChild(subDivHttp)
 201
 202     this.player_.peertube().on('torrentInfo', (event, data) => {
 203       // We are in HTTP fallback
 204       if (!data) {
 205         subDivHttp.className = 'vjs-peertube-displayed'
 206         subDivWebtorrent.className = 'vjs-peertube-hidden'
 207
 208         return
 209       }
 210
 211       const downloadSpeed = bytes(data.downloadSpeed)
 212       const uploadSpeed = bytes(data.uploadSpeed)
 213       const numPeers = data.numPeers
 214
 215       downloadSpeedNumber.textContent = downloadSpeed[ 0 ]
 216       downloadSpeedUnit.textContent = ' ' + downloadSpeed[ 1 ]
 217
 218       uploadSpeedNumber.textContent = uploadSpeed[ 0 ]
 219       uploadSpeedUnit.textContent = ' ' + uploadSpeed[ 1 ]
 220
 221       peersNumber.textContent = numPeers
 222       peersText.textContent = ' peers'
 223
 224       subDivHttp.className = 'vjs-peertube-hidden'
 225       subDivWebtorrent.className = 'vjs-peertube-displayed'
 226     })
 227
 228     return div
 229   }
 230
 231   dispose () {
 232     this.parentNode.removeChild(this)
 233   }
 234 }
 235 Button.registerComponent('WebTorrentButton', WebTorrentButton)
 236
 237 const Plugin: VideoJSComponentInterface = videojsUntyped.getPlugin('plugin')
 238 class PeerTubePlugin extends Plugin {
 239   private player: any
 240   private currentVideoFile: VideoFile
 241   private playerElement: HTMLVideoElement
 242   private videoFiles: VideoFile[]
 243   private torrent: WebTorrent.Torrent
 244   private autoplay = false
 245   private videoViewUrl: string
 246   private videoDuration: number
 247   private videoViewInterval
 248   private torrentInfoInterval
 249   private savePlayerSrcFunction: Function
 250
 251   constructor (player: videojs.Player, options: PeertubePluginOptions) {
 252     super(player, options)
 253
 254     // Fix canplay event on google chrome by disabling default videojs autoplay
 255     this.autoplay = this.player.options_.autoplay
 256     this.player.options_.autoplay = false
 257
 258     this.videoFiles = options.videoFiles
 259     this.videoViewUrl = options.videoViewUrl
 260     this.videoDuration = options.videoDuration
 261
 262     this.savePlayerSrcFunction = this.player.src
 263     // Hack to "simulate" src link in video.js >= 6
 264     // Without this, we can't play the video after pausing it
 265     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
 266     this.player.src = () => true
 267
 268     this.playerElement = options.playerElement
 269
 270     this.player.ready(() => {
 271       this.initializePlayer(options)
 272       this.runTorrentInfoScheduler()
 273       this.runViewAdd()
 274     })
 275   }
 276
 277   dispose () {
 278     clearInterval(this.videoViewInterval)
 279     clearInterval(this.torrentInfoInterval)
 280
 281     // Don't need to destroy renderer, video player will be destroyed
 282     this.flushVideoFile(this.currentVideoFile, false)
 283   }
 284
 285   getCurrentResolution () {
 286     return this.currentVideoFile ? this.currentVideoFile.resolution : -1
 287   }
 288
 289   getCurrentResolutionLabel () {
 290     return this.currentVideoFile ? this.currentVideoFile.resolutionLabel : ''
 291   }
 292
 293   updateVideoFile (videoFile?: VideoFile, done?: () => void) {
 294     if (done === undefined) {
 295       done = () => { /* empty */ }
 296     }
 297
 298     // Pick the first one
 299     if (videoFile === undefined) {
 300       videoFile = this.videoFiles[0]
 301     }
 302
 303     // Don't add the same video file once again
 304     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 305       return
 306     }
 307
 308     // Do not display error to user because we will have multiple fallbacks
 309     this.disableErrorDisplay()
 310     this.player.src = () => true
 311
 312     const previousVideoFile = this.currentVideoFile
 313     this.currentVideoFile = videoFile
 314
 315     console.log('Adding ' + videoFile.magnetUri + '.')
 316     this.torrent = webtorrent.add(videoFile.magnetUri, torrent => {
 317       console.log('Added ' + videoFile.magnetUri + '.')
 318
 319       this.flushVideoFile(previousVideoFile)
 320
 321       const options = { autoplay: true, controls: true }
 322       renderVideo(torrent.files[0], this.playerElement, options,(err, renderer) => {
 323         if (err) return this.fallbackToHttp()
 324
 325         this.renderer = renderer
 326         if (!this.player.paused()) {
 327           const playPromise = this.player.play()
 328           if (playPromise !== undefined) return playPromise.then(done)
 329
 330           return done()
 331         }
 332
 333         return done()
 334       })
 335     })
 336
 337     this.torrent.on('error', err => this.handleError(err))
 338     this.torrent.on('warning', (err: any) => {
 339       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 340       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 341       // Users don't care about issues with WebRTC, but developers do so log it in the console
 342       if (err.message.indexOf('Ice connection failed') !== -1) {
 343         console.error(err)
 344         return
 345       }
 346
 347       return this.handleError(err)
 348     })
 349
 350     this.trigger('videoFileUpdate')
 351   }
 352
 353   updateResolution (resolution) {
 354     // Remember player state
 355     const currentTime = this.player.currentTime()
 356     const isPaused = this.player.paused()
 357
 358     // Remove poster to have black background
 359     this.playerElement.poster = ''
 360
 361     // Hide bigPlayButton
 362     if (!isPaused) {
 363       this.player.bigPlayButton.hide()
 364     }
 365
 366     const newVideoFile = this.videoFiles.find(f => f.resolution === resolution)
 367     this.updateVideoFile(newVideoFile, () => {
 368       this.player.currentTime(currentTime)
 369       this.player.handleTechSeeked_()
 370     })
 371   }
 372
 373   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 374     if (videoFile !== undefined && webtorrent.get(videoFile.magnetUri)) {
 375       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 376
 377       webtorrent.remove(videoFile.magnetUri)
 378       console.log('Removed ' + videoFile.magnetUri)
 379     }
 380   }
 381
 382   setVideoFiles (files: VideoFile[], videoViewUrl: string, videoDuration: number) {
 383     this.videoViewUrl = videoViewUrl
 384     this.videoDuration = videoDuration
 385     this.videoFiles = files
 386
 387     // Re run view add for the new video
 388     this.runViewAdd()
 389     this.updateVideoFile(undefined, () => this.player.play())
 390   }
 391
 392   private initializePlayer (options: PeertubePluginOptions) {
 393     const controlBar = this.player.controlBar
 394
 395     const menuButton = new ResolutionMenuButton(this.player, options)
 396     const fullscreenElement = controlBar.fullscreenToggle.el()
 397     controlBar.resolutionSwitcher = controlBar.el().insertBefore(menuButton.el(), fullscreenElement)
 398
 399     if (options.peerTubeLink === true) {
 400       const peerTubeLinkButton = new PeertubeLinkButton(this.player)
 401       controlBar.peerTubeLink = controlBar.el().insertBefore(peerTubeLinkButton.el(), fullscreenElement)
 402     }
 403
 404     const webTorrentButton = new WebTorrentButton(this.player)
 405     controlBar.webTorrent = controlBar.el().insertBefore(webTorrentButton.el(), controlBar.progressControl.el())
 406
 407     if (this.autoplay === true) {
 408       this.updateVideoFile(undefined, () => this.player.play())
 409     } else {
 410       this.player.one('play', () => {
 411         this.player.pause()
 412         this.updateVideoFile(undefined, () => this.player.play())
 413       })
 414     }
 415   }
 416
 417   private runTorrentInfoScheduler () {
 418     this.torrentInfoInterval = setInterval(() => {
 419       // Not initialized yet
 420       if (this.torrent === undefined) return
 421
 422       // Http fallback
 423       if (this.torrent === null) return this.trigger('torrentInfo', false)
 424
 425       return this.trigger('torrentInfo', {
 426         downloadSpeed: this.torrent.downloadSpeed,
 427         numPeers: this.torrent.numPeers,
 428         uploadSpeed: this.torrent.uploadSpeed
 429       })
 430     }, 1000)
 431   }
 432
 433   private runViewAdd () {
 434     this.clearVideoViewInterval()
 435
 436     // After 30 seconds (or 3/4 of the video), add a view to the video
 437     let minSecondsToView = 30
 438
 439     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 440
 441     let secondsViewed = 0
 442     this.videoViewInterval = setInterval(() => {
 443       if (this.player && !this.player.paused()) {
 444         secondsViewed += 1
 445
 446         if (secondsViewed > minSecondsToView) {
 447           this.clearVideoViewInterval()
 448
 449           this.addViewToVideo().catch(err => console.error(err))
 450         }
 451       }
 452     }, 1000)
 453   }
 454
 455   private clearVideoViewInterval () {
 456     if (this.videoViewInterval !== undefined) {
 457       clearInterval(this.videoViewInterval)
 458       this.videoViewInterval = undefined
 459     }
 460   }
 461
 462   private addViewToVideo () {
 463     return fetch(this.videoViewUrl, { method: 'POST' })
 464   }
 465
 466   private fallbackToHttp () {
 467     this.flushVideoFile(this.currentVideoFile, true)
 468     this.torrent = null
 469
 470     // Enable error display now this is our last fallback
 471     this.player.one('error', () => this.enableErrorDisplay())
 472
 473     const httpUrl = this.currentVideoFile.fileUrl
 474     this.player.src = this.savePlayerSrcFunction
 475     this.player.src(httpUrl)
 476     this.player.play()
 477   }
 478
 479   private handleError (err: Error | string) {
 480     return this.player.trigger('customError', { err })
 481   }
 482
 483   private enableErrorDisplay () {
 484     this.player.addClass('vjs-error-display-enabled')
 485   }
 486
 487   private disableErrorDisplay () {
 488     this.player.removeClass('vjs-error-display-enabled')
 489   }
 490 }
 491 videojsUntyped.registerPlugin('peertube', PeerTubePlugin)