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