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.ready(() => this.initialize())
  55   }
  56
  57   dispose () {
  58     clearInterval(this.networkInfoInterval)
  59   }
  60
  61   private initialize () {
  62     initHlsJsPlayer(this.hlsjs)
  63
  64     this.p2pEngine = this.player.tech_.options_.hlsjsConfig.loader.getEngine()
  65
  66     // Avoid using constants to not import hls.hs
  67     // https://github.com/video-dev/hls.js/blob/master/src/events.js#L37
  68     this.hlsjs.on('hlsLevelSwitching', (_: any, data: any) => {
  69       this.trigger('resolutionChange', { auto: this.hlsjs.autoLevelEnabled, resolutionId: data.height })
  70     })
  71
  72     this.p2pEngine.on(Events.SegmentError, (segment, err) => {
  73       console.error('Segment error.', segment, err)
  74     })
  75
  76     this.statsP2PBytes.numPeers = 1 + this.options.redundancyBaseUrls.length
  77
  78     this.runStats()
  79   }
  80
  81   private runStats () {
  82     this.p2pEngine.on(Events.PieceBytesDownloaded, (method: string, size: number) => {
  83       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
  84
  85       elem.pendingDownload.push(size)
  86       elem.totalDownload += size
  87     })
  88
  89     this.p2pEngine.on(Events.PieceBytesUploaded, (method: string, size: number) => {
  90       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
  91
  92       elem.pendingUpload.push(size)
  93       elem.totalUpload += size
  94     })
  95
  96     this.p2pEngine.on(Events.PeerConnect, () => this.statsP2PBytes.numPeers++)
  97     this.p2pEngine.on(Events.PeerClose, () => this.statsP2PBytes.numPeers--)
  98
  99     this.networkInfoInterval = setInterval(() => {
 100       const p2pDownloadSpeed = this.arraySum(this.statsP2PBytes.pendingDownload)
 101       const p2pUploadSpeed = this.arraySum(this.statsP2PBytes.pendingUpload)
 102
 103       const httpDownloadSpeed = this.arraySum(this.statsHTTPBytes.pendingDownload)
 104       const httpUploadSpeed = this.arraySum(this.statsHTTPBytes.pendingUpload)
 105
 106       this.statsP2PBytes.pendingDownload = []
 107       this.statsP2PBytes.pendingUpload = []
 108       this.statsHTTPBytes.pendingDownload = []
 109       this.statsHTTPBytes.pendingUpload = []
 110
 111       return this.player.trigger('p2pInfo', {
 112         http: {
 113           downloadSpeed: httpDownloadSpeed,
 114           uploadSpeed: httpUploadSpeed,
 115           downloaded: this.statsHTTPBytes.totalDownload,
 116           uploaded: this.statsHTTPBytes.totalUpload
 117         },
 118         p2p: {
 119           downloadSpeed: p2pDownloadSpeed,
 120           uploadSpeed: p2pUploadSpeed,
 121           numPeers: this.statsP2PBytes.numPeers,
 122           downloaded: this.statsP2PBytes.totalDownload,
 123           uploaded: this.statsP2PBytes.totalUpload
 124         }
 125       } as PlayerNetworkInfo)
 126     }, this.CONSTANTS.INFO_SCHEDULER)
 127   }
 128
 129   private arraySum (data: number[]) {
 130     return data.reduce((a: number, b: number) => a + b, 0)
 131   }
 132 }
 133
 134 videojs.registerPlugin('p2pMediaLoader', P2pMediaLoaderPlugin)
 135 export { P2pMediaLoaderPlugin }