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[github/Chocobozzz/PeerTube.git] / client / src / assets / player / peertube-videojs-plugin.ts
index 10c31cc0f9db91e10e945402d803b5103f9c2d57..4b0677faba6dc43f9a85e8e22277371bf919c7a5 100644 (file)
@@ -3,49 +3,84 @@ import * as WebTorrent from 'webtorrent'
 import { VideoFile } from '../../../../shared/models/videos/video.model'
 import { renderVideo } from './video-renderer'
 import './settings-menu-button'
-import { PeertubePluginOptions, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
-import { getStoredMute, getStoredVolume, saveMuteInStore, saveVolumeInStore } from './utils'
-
-const webtorrent = new WebTorrent({
-  tracker: {
-    rtcConfig: {
-      iceServers: [
-        {
-          urls: 'stun:stun.stunprotocol.org'
-        },
-        {
-          urls: 'stun:stun.framasoft.org'
-        }
-      ]
-    }
-  },
-  dht: false
-})
-
-const Plugin: VideoJSComponentInterface = videojsUntyped.getPlugin('plugin')
+import { PeertubePluginOptions, VideoJSCaption, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
+import { isMobile, videoFileMaxByResolution, videoFileMinByResolution, timeToInt } from './utils'
+import * as CacheChunkStore from 'cache-chunk-store'
+import { PeertubeChunkStore } from './peertube-chunk-store'
+import {
+  getAverageBandwidthInStore,
+  getStoredMute,
+  getStoredVolume,
+  saveAverageBandwidth,
+  saveMuteInStore,
+  saveVolumeInStore
+} from './peertube-player-local-storage'
+
+const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
 class PeerTubePlugin extends Plugin {
   private readonly playerElement: HTMLVideoElement
+
   private readonly autoplay: boolean = false
+  private readonly startTime: number = 0
   private readonly savePlayerSrcFunction: Function
+  private readonly videoFiles: VideoFile[]
+  private readonly videoViewUrl: string
+  private readonly videoDuration: number
+  private readonly CONSTANTS = {
+    INFO_SCHEDULER: 1000, // Don't change this
+    AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
+    AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
+    AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
+    AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
+    BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
+  }
+
+  private readonly webtorrent = new WebTorrent({
+    tracker: {
+      rtcConfig: {
+        iceServers: [
+          {
+            urls: 'stun:stun.stunprotocol.org'
+          },
+          {
+            urls: 'stun:stun.framasoft.org'
+          }
+        ]
+      }
+    },
+    dht: false
+  })
+
   private player: any
   private currentVideoFile: VideoFile
-  private videoFiles: VideoFile[]
   private torrent: WebTorrent.Torrent
-  private videoViewUrl: string
-  private videoDuration: number
+  private videoCaptions: VideoJSCaption[]
+  private renderer
+  private fakeRenderer
+  private autoResolution = true
+  private forbidAutoResolution = false
+  private isAutoResolutionObservation = false
+
   private videoViewInterval
   private torrentInfoInterval
+  private autoQualityInterval
+  private addTorrentDelay
+  private qualityObservationTimer
+  private runAutoQualitySchedulerTimer
+
+  private downloadSpeeds: number[] = []
 
   constructor (player: videojs.Player, options: PeertubePluginOptions) {
     super(player, options)
 
-    // Fix canplay event on google chrome by disabling default videojs autoplay
-    this.autoplay = this.player.options_.autoplay
-    this.player.options_.autoplay = false
+    // Disable auto play on iOS
+    this.autoplay = options.autoplay && this.isIOS() === false
 
+    this.startTime = timeToInt(options.startTime)
     this.videoFiles = options.videoFiles
     this.videoViewUrl = options.videoViewUrl
     this.videoDuration = options.videoDuration
+    this.videoCaptions = options.videoCaptions
 
     this.savePlayerSrcFunction = this.player.src
     // Hack to "simulate" src link in video.js >= 6
@@ -55,6 +90,8 @@ class PeerTubePlugin extends Plugin {
 
     this.playerElement = options.playerElement
 
+    if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
+
     this.player.ready(() => {
       const volume = getStoredVolume()
       if (volume !== undefined) this.player.volume(volume)
@@ -64,6 +101,13 @@ class PeerTubePlugin extends Plugin {
       this.initializePlayer()
       this.runTorrentInfoScheduler()
       this.runViewAdd()
+
+      this.player.one('play', () => {
+        // Don't run immediately scheduler, wait some seconds the TCP connections are made
+        this.runAutoQualitySchedulerTimer = setTimeout(() => {
+          this.runAutoQualityScheduler()
+        }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
+      })
     })
 
     this.player.on('volumechange', () => {
@@ -73,11 +117,18 @@ class PeerTubePlugin extends Plugin {
   }
 
   dispose () {
+    clearTimeout(this.addTorrentDelay)
+    clearTimeout(this.qualityObservationTimer)
+    clearTimeout(this.runAutoQualitySchedulerTimer)
+
     clearInterval(this.videoViewInterval)
     clearInterval(this.torrentInfoInterval)
+    clearInterval(this.autoQualityInterval)
 
     // Don't need to destroy renderer, video player will be destroyed
     this.flushVideoFile(this.currentVideoFile, false)
+
+    this.destroyFakeRenderer()
   }
 
   getCurrentResolutionId () {
@@ -85,17 +136,27 @@ class PeerTubePlugin extends Plugin {
   }
 
   getCurrentResolutionLabel () {
-    return this.currentVideoFile ? this.currentVideoFile.resolution.label : ''
-  }
+    if (!this.currentVideoFile) return ''
 
-  updateVideoFile (videoFile?: VideoFile, done?: () => void) {
-    if (done === undefined) {
-      done = () => { /* empty */ }
-    }
+    const fps = this.currentVideoFile.fps >= 50 ? this.currentVideoFile.fps : ''
+    return this.currentVideoFile.resolution.label + fps
+  }
 
-    // Pick the first one
+  updateVideoFile (
+    videoFile?: VideoFile,
+    options: {
+      forcePlay?: boolean,
+      seek?: number,
+      delay?: number
+    } = {},
+    done: () => void = () => { /* empty */ }
+  ) {
+    // Automatically choose the adapted video file
     if (videoFile === undefined) {
-      videoFile = this.videoFiles[0]
+      const savedAverageBandwidth = getAverageBandwidthInStore()
+      videoFile = savedAverageBandwidth
+        ? this.getAppropriateFile(savedAverageBandwidth)
+        : this.pickAverageVideoFile()
     }
 
     // Don't add the same video file once again
@@ -112,7 +173,7 @@ class PeerTubePlugin extends Plugin {
     const previousVideoFile = this.currentVideoFile
     this.currentVideoFile = videoFile
 
-    this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, () => {
+    this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
       this.player.playbackRate(oldPlaybackRate)
       return done()
     })
@@ -120,32 +181,75 @@ class PeerTubePlugin extends Plugin {
     this.trigger('videoFileUpdate')
   }
 
-  addTorrent (magnetOrTorrentUrl: string, previousVideoFile: VideoFile, done: Function) {
+  addTorrent (
+    magnetOrTorrentUrl: string,
+    previousVideoFile: VideoFile,
+    options: {
+      forcePlay?: boolean,
+      seek?: number,
+      delay?: number
+    },
+    done: Function
+  ) {
     console.log('Adding ' + magnetOrTorrentUrl + '.')
 
-    this.torrent = webtorrent.add(magnetOrTorrentUrl, torrent => {
-      console.log('Added ' + magnetOrTorrentUrl + '.')
+    const oldTorrent = this.torrent
+    const torrentOptions = {
+      store: (chunkLength, storeOpts) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
+        max: 100
+      })
+    }
 
-      this.flushVideoFile(previousVideoFile)
+    this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
+      console.log('Added ' + magnetOrTorrentUrl + '.')
 
-      const options = { autoplay: true, controls: true }
-      renderVideo(torrent.files[0], this.playerElement, options,(err, renderer) => {
-        this.renderer = renderer
+      if (oldTorrent) {
+        // Pause the old torrent
+        oldTorrent.pause()
+        // Pause does not remove actual peers (in particular the webseed peer)
+        oldTorrent.removePeer(oldTorrent['ws'])
 
-        if (err) return this.fallbackToHttp(done)
+        // We use a fake renderer so we download correct pieces of the next file
+        if (options.delay) {
+          const fakeVideoElem = document.createElement('video')
+          renderVideo(torrent.files[0], fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
+            this.fakeRenderer = renderer
 
-        if (!this.player.paused()) {
-          const playPromise = this.player.play()
-          if (playPromise !== undefined) return playPromise.then(done)
+            if (err) console.error('Cannot render new torrent in fake video element.', err)
 
-          return done()
+            // Load the future file at the correct time
+            fakeVideoElem.currentTime = this.player.currentTime() + (options.delay / 2000)
+          })
         }
+      }
 
-        return done()
-      })
+      // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
+      this.addTorrentDelay = setTimeout(() => {
+        this.destroyFakeRenderer()
+
+        const paused = this.player.paused()
+
+        this.flushVideoFile(previousVideoFile)
+
+        const renderVideoOptions = { autoplay: false, controls: true }
+        renderVideo(torrent.files[0], this.playerElement, renderVideoOptions,(err, renderer) => {
+          this.renderer = renderer
+
+          if (err) return this.fallbackToHttp(done)
+
+          return this.tryToPlay(err => {
+            if (err) return done(err)
+
+            if (options.seek) this.seek(options.seek)
+            if (options.forcePlay === false && paused === true) this.player.pause()
+
+            return done(err)
+          })
+        })
+      }, options.delay || 0)
     })
 
-    this.torrent.on('error', err => this.handleError(err))
+    this.torrent.on('error', err => console.error(err))
 
     this.torrent.on('warning', (err: any) => {
       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
@@ -153,21 +257,27 @@ class PeerTubePlugin extends Plugin {
 
       // Users don't care about issues with WebRTC, but developers do so log it in the console
       if (err.message.indexOf('Ice connection failed') !== -1) {
-        console.error(err)
+        console.log(err)
         return
       }
 
       // Magnet hash is not up to date with the torrent file, add directly the torrent file
       if (err.message.indexOf('incorrect info hash') !== -1) {
         console.error('Incorrect info hash detected, falling back to torrent file.')
-        return this.addTorrent(this.torrent['xs'], previousVideoFile, done)
+        const newOptions = { forcePlay: true, seek: options.seek }
+        return this.addTorrent(this.torrent['xs'], previousVideoFile, newOptions, done)
+      }
+
+      // Remote instance is down
+      if (err.message.indexOf('from xs param') !== -1) {
+        this.handleError(err)
       }
 
-      return this.handleError(err)
+      console.warn(err)
     })
   }
 
-  updateResolution (resolutionId: number) {
+  updateResolution (resolutionId: number, delay = 0) {
     // Remember player state
     const currentTime = this.player.currentTime()
     const isPaused = this.player.paused()
@@ -181,49 +291,208 @@ class PeerTubePlugin extends Plugin {
     }
 
     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
-    this.updateVideoFile(newVideoFile, () => {
-      this.player.currentTime(currentTime)
-      this.player.handleTechSeeked_()
-    })
+    const options = {
+      forcePlay: false,
+      delay,
+      seek: currentTime + (delay / 1000)
+    }
+    this.updateVideoFile(newVideoFile, options)
   }
 
   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
-    if (videoFile !== undefined && webtorrent.get(videoFile.magnetUri)) {
+    if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 
-      webtorrent.remove(videoFile.magnetUri)
+      this.webtorrent.remove(videoFile.magnetUri)
       console.log('Removed ' + videoFile.magnetUri)
     }
   }
 
-  setVideoFiles (files: VideoFile[], videoViewUrl: string, videoDuration: number) {
-    this.videoViewUrl = videoViewUrl
-    this.videoDuration = videoDuration
-    this.videoFiles = files
+  isAutoResolutionOn () {
+    return this.autoResolution
+  }
+
+  enableAutoResolution () {
+    this.autoResolution = true
+    this.trigger('autoResolutionUpdate')
+  }
+
+  disableAutoResolution (forbid = false) {
+    if (forbid === true) this.forbidAutoResolution = true
+
+    this.autoResolution = false
+    this.trigger('autoResolutionUpdate')
+  }
+
+  isAutoResolutionForbidden () {
+    return this.forbidAutoResolution === true
+  }
+
+  getCurrentVideoFile () {
+    return this.currentVideoFile
+  }
+
+  getTorrent () {
+    return this.torrent
+  }
+
+  private tryToPlay (done?: Function) {
+    if (!done) done = function () { /* empty */ }
+
+    const playPromise = this.player.play()
+    if (playPromise !== undefined) {
+      return playPromise.then(done)
+                        .catch(err => {
+                          if (err.message.indexOf('The play() request was interrupted by a call to pause()') !== -1) {
+                            return
+                          }
+
+                          console.error(err)
+                          this.player.pause()
+                          this.player.posterImage.show()
+                          this.player.removeClass('vjs-has-autoplay')
+                          this.player.removeClass('vjs-has-big-play-button-clicked')
+
+                          return done()
+                        })
+    }
+
+    return done()
+  }
 
-    // Re run view add for the new video
-    this.runViewAdd()
-    this.updateVideoFile(undefined, () => this.player.play())
+  private seek (time: number) {
+    this.player.currentTime(time)
+    this.player.handleTechSeeked_()
+  }
+
+  private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
+    if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
+    if (this.videoFiles.length === 1) return this.videoFiles[0]
+
+    // Don't change the torrent is the play was ended
+    if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
+
+    if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
+
+    // Limit resolution according to player height
+    const playerHeight = this.playerElement.offsetHeight as number
+
+    // We take the first resolution just above the player height
+    // Example: player height is 530px, we want the 720p file instead of 480p
+    let maxResolution = this.videoFiles[0].resolution.id
+    for (let i = this.videoFiles.length - 1; i >= 0; i--) {
+      const resolutionId = this.videoFiles[i].resolution.id
+      if (resolutionId >= playerHeight) {
+        maxResolution = resolutionId
+        break
+      }
+    }
+
+    // Filter videos we can play according to our screen resolution and bandwidth
+    const filteredFiles = this.videoFiles
+                              .filter(f => f.resolution.id <= maxResolution)
+                              .filter(f => {
+                                const fileBitrate = (f.size / this.videoDuration)
+                                let threshold = fileBitrate
+
+                                // If this is for a higher resolution or an initial load: add a margin
+                                if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
+                                  threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
+                                }
+
+                                return averageDownloadSpeed > threshold
+                              })
+
+    // If the download speed is too bad, return the lowest resolution we have
+    if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
+
+    return videoFileMaxByResolution(filteredFiles)
+  }
+
+  private getAndSaveActualDownloadSpeed () {
+    const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
+    const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
+    if (lastDownloadSpeeds.length === 0) return -1
+
+    const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
+    const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
+
+    // Save the average bandwidth for future use
+    saveAverageBandwidth(averageBandwidth)
+
+    return averageBandwidth
   }
 
   private initializePlayer () {
+    if (isMobile()) this.player.addClass('vjs-is-mobile')
+
     this.initSmoothProgressBar()
 
+    this.initCaptions()
+
     this.alterInactivity()
 
     if (this.autoplay === true) {
       this.player.posterImage.hide()
-      this.updateVideoFile(undefined, () => this.player.play())
+
+      this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
     } else {
+      // Don't try on iOS that does not support MediaSource
+      if (this.isIOS()) {
+        this.currentVideoFile = this.pickAverageVideoFile()
+        return this.fallbackToHttp(undefined, false)
+      }
+
       // Proxy first play
       const oldPlay = this.player.play.bind(this.player)
       this.player.play = () => {
-        this.updateVideoFile(undefined, () => oldPlay)
+        this.player.addClass('vjs-has-big-play-button-clicked')
         this.player.play = oldPlay
+
+        this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
       }
     }
   }
 
+  private runAutoQualityScheduler () {
+    this.autoQualityInterval = setInterval(() => {
+
+      // Not initialized or in HTTP fallback
+      if (this.torrent === undefined || this.torrent === null) return
+      if (this.isAutoResolutionOn() === false) return
+      if (this.isAutoResolutionObservation === true) return
+
+      const file = this.getAppropriateFile()
+      let changeResolution = false
+      let changeResolutionDelay = 0
+
+      // Lower resolution
+      if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
+        console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
+        changeResolution = true
+      } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
+        console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
+        changeResolution = true
+        changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
+      }
+
+      if (changeResolution === true) {
+        this.updateResolution(file.resolution.id, changeResolutionDelay)
+
+        // Wait some seconds in observation of our new resolution
+        this.isAutoResolutionObservation = true
+
+        this.qualityObservationTimer = setTimeout(() => {
+          this.isAutoResolutionObservation = false
+        }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
+      }
+    }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
+  }
+
+  private isPlayerWaiting () {
+    return this.player && this.player.hasClass('vjs-waiting')
+  }
+
   private runTorrentInfoScheduler () {
     this.torrentInfoInterval = setInterval(() => {
       // Not initialized yet
@@ -232,12 +501,17 @@ class PeerTubePlugin extends Plugin {
       // Http fallback
       if (this.torrent === null) return this.trigger('torrentInfo', false)
 
+      // this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
+      if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
+
       return this.trigger('torrentInfo', {
         downloadSpeed: this.torrent.downloadSpeed,
         numPeers: this.torrent.numPeers,
-        uploadSpeed: this.torrent.uploadSpeed
+        uploadSpeed: this.torrent.uploadSpeed,
+        downloaded: this.torrent.downloaded,
+        uploaded: this.torrent.uploaded
       })
-    }, 1000)
+    }, this.CONSTANTS.INFO_SCHEDULER)
   }
 
   private runViewAdd () {
@@ -270,10 +544,14 @@ class PeerTubePlugin extends Plugin {
   }
 
   private addViewToVideo () {
+    if (!this.videoViewUrl) return Promise.resolve(undefined)
+
     return fetch(this.videoViewUrl, { method: 'POST' })
   }
 
-  private fallbackToHttp (done: Function) {
+  private fallbackToHttp (done?: Function, play = true) {
+    this.disableAutoResolution(true)
+
     this.flushVideoFile(this.currentVideoFile, true)
     this.torrent = null
 
@@ -283,9 +561,9 @@ class PeerTubePlugin extends Plugin {
     const httpUrl = this.currentVideoFile.fileUrl
     this.player.src = this.savePlayerSrcFunction
     this.player.src(httpUrl)
-    this.player.play()
+    if (play) this.tryToPlay()
 
-    return done()
+    if (done) return done()
   }
 
   private handleError (err: Error | string) {
@@ -300,6 +578,10 @@ class PeerTubePlugin extends Plugin {
     this.player.removeClass('vjs-error-display-enabled')
   }
 
+  private isIOS () {
+    return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
+  }
+
   private alterInactivity () {
     let saveInactivityTimeout: number
 
@@ -319,6 +601,37 @@ class PeerTubePlugin extends Plugin {
     settingsDialog.on('mouseleave', () => enableInactivity())
   }
 
+  private pickAverageVideoFile () {
+    if (this.videoFiles.length === 1) return this.videoFiles[0]
+
+    return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
+  }
+
+  private destroyFakeRenderer () {
+    if (this.fakeRenderer) {
+      if (this.fakeRenderer.destroy) {
+        try {
+          this.fakeRenderer.destroy()
+        } catch (err) {
+          console.log('Cannot destroy correctly fake renderer.', err)
+        }
+      }
+      this.fakeRenderer = undefined
+    }
+  }
+
+  private initCaptions () {
+    for (const caption of this.videoCaptions) {
+      this.player.addRemoteTextTrack({
+        kind: 'captions',
+        label: caption.label,
+        language: caption.language,
+        id: caption.language,
+        src: caption.src
+      }, false)
+    }
+  }
+
   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
   private initSmoothProgressBar () {
     const SeekBar = videojsUntyped.getComponent('SeekBar')
@@ -342,5 +655,5 @@ class PeerTubePlugin extends Plugin {
   }
 }
 
-videojsUntyped.registerPlugin('peertube', PeerTubePlugin)
+videojs.registerPlugin('peertube', PeerTubePlugin)
 export { PeerTubePlugin }