client/src/assets/player/p2p-media-loader/p2p-media-loader-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 import { P2PMediaLoaderPluginOptions, PlayerNetworkInfo, VideoJSComponentInterface } from '../peertube-videojs-typings'
   5 import { Engine, initHlsJsPlayer, initVideoJsContribHlsJsPlayer } from 'p2p-media-loader-hlsjs'
   6 import { Events } from 'p2p-media-loader-core'
   7 import { timeToInt } from '../utils'
   8
   9 // videojs-hlsjs-plugin needs videojs in window
  10 window['videojs'] = videojs
  11 require('@streamroot/videojs-hlsjs-plugin')
  12
  13 const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
  14 class P2pMediaLoaderPlugin extends Plugin {
  15
  16   private readonly CONSTANTS = {
  17     INFO_SCHEDULER: 1000 // Don't change this
  18   }
  19   private readonly options: P2PMediaLoaderPluginOptions
  20
  21   private hlsjs: any // Don't type hlsjs to not bundle the module
  22   private p2pEngine: Engine
  23   private statsP2PBytes = {
  24     pendingDownload: [] as number[],
  25     pendingUpload: [] as number[],
  26     numPeers: 0,
  27     totalDownload: 0,
  28     totalUpload: 0
  29   }
  30   private statsHTTPBytes = {
  31     pendingDownload: [] as number[],
  32     pendingUpload: [] as number[],
  33     totalDownload: 0,
  34     totalUpload: 0
  35   }
  36   private startTime: number
  37
  38   private networkInfoInterval: any
  39
  40   constructor (player: videojs.Player, options: P2PMediaLoaderPluginOptions) {
  41     super(player, options)
  42
  43     this.options = options
  44
  45     if (!videojs.Html5Hlsjs) {
  46       const message = 'HLS.js does not seem to be supported.'
  47       console.warn(message)
  48
  49       player.ready(() => player.trigger('error', new Error(message)))
  50       return
  51     }
  52
  53     videojs.Html5Hlsjs.addHook('beforeinitialize', (videojsPlayer: any, hlsjs: any) => {
  54       this.hlsjs = hlsjs
  55     })
  56
  57     initVideoJsContribHlsJsPlayer(player)
  58
  59     this.startTime = timeToInt(options.startTime)
  60
  61     player.src({
  62       type: options.type,
  63       src: options.src
  64     })
  65
  66     player.one('play', () => {
  67       player.addClass('vjs-has-big-play-button-clicked')
  68     })
  69
  70     player.ready(() => this.initialize())
  71   }
  72
  73   dispose () {
  74     if (this.hlsjs) this.hlsjs.destroy()
  75     if (this.p2pEngine) this.p2pEngine.destroy()
  76
  77     clearInterval(this.networkInfoInterval)
  78   }
  79
  80   private initialize () {
  81     initHlsJsPlayer(this.hlsjs)
  82
  83     const tech = this.player.tech_
  84     this.p2pEngine = tech.options_.hlsjsConfig.loader.getEngine()
  85
  86     // Avoid using constants to not import hls.hs
  87     // https://github.com/video-dev/hls.js/blob/master/src/events.js#L37
  88     this.hlsjs.on('hlsLevelSwitching', (_: any, data: any) => {
  89       this.trigger('resolutionChange', { auto: this.hlsjs.autoLevelEnabled, resolutionId: data.height })
  90     })
  91
  92     this.p2pEngine.on(Events.SegmentError, (segment, err) => {
  93       console.error('Segment error.', segment, err)
  94     })
  95
  96     this.statsP2PBytes.numPeers = 1 + this.options.redundancyBaseUrls.length
  97
  98     this.runStats()
  99
 100     this.hlsjs.on('hlsLevelLoaded', () => {
 101       if (this.startTime) this.player.currentTime(this.startTime)
 102
 103       this.hlsjs.off('hlsLevelLoaded', this)
 104     })
 105   }
 106
 107   private runStats () {
 108     this.p2pEngine.on(Events.PieceBytesDownloaded, (method: string, size: number) => {
 109       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
 110
 111       elem.pendingDownload.push(size)
 112       elem.totalDownload += size
 113     })
 114
 115     this.p2pEngine.on(Events.PieceBytesUploaded, (method: string, size: number) => {
 116       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
 117
 118       elem.pendingUpload.push(size)
 119       elem.totalUpload += size
 120     })
 121
 122     this.p2pEngine.on(Events.PeerConnect, () => this.statsP2PBytes.numPeers++)
 123     this.p2pEngine.on(Events.PeerClose, () => this.statsP2PBytes.numPeers--)
 124
 125     this.networkInfoInterval = setInterval(() => {
 126       const p2pDownloadSpeed = this.arraySum(this.statsP2PBytes.pendingDownload)
 127       const p2pUploadSpeed = this.arraySum(this.statsP2PBytes.pendingUpload)
 128
 129       const httpDownloadSpeed = this.arraySum(this.statsHTTPBytes.pendingDownload)
 130       const httpUploadSpeed = this.arraySum(this.statsHTTPBytes.pendingUpload)
 131
 132       this.statsP2PBytes.pendingDownload = []
 133       this.statsP2PBytes.pendingUpload = []
 134       this.statsHTTPBytes.pendingDownload = []
 135       this.statsHTTPBytes.pendingUpload = []
 136
 137       return this.player.trigger('p2pInfo', {
 138         http: {
 139           downloadSpeed: httpDownloadSpeed,
 140           uploadSpeed: httpUploadSpeed,
 141           downloaded: this.statsHTTPBytes.totalDownload,
 142           uploaded: this.statsHTTPBytes.totalUpload
 143         },
 144         p2p: {
 145           downloadSpeed: p2pDownloadSpeed,
 146           uploadSpeed: p2pUploadSpeed,
 147           numPeers: this.statsP2PBytes.numPeers,
 148           downloaded: this.statsP2PBytes.totalDownload,
 149           uploaded: this.statsP2PBytes.totalUpload
 150         }
 151       } as PlayerNetworkInfo)
 152     }, this.CONSTANTS.INFO_SCHEDULER)
 153   }
 154
 155   private arraySum (data: number[]) {
 156     return data.reduce((a: number, b: number) => a + b, 0)
 157   }
 158 }
 159
 160 videojs.registerPlugin('p2pMediaLoader', P2pMediaLoaderPlugin)
 161 export { P2pMediaLoaderPlugin }