client/src/assets/player/shared/p2p-media-loader/p2p-media-loader-plugin.ts

   1 import Hlsjs from 'hls.js'
   2 import videojs from 'video.js'
   3 import { Events, Segment } from '@peertube/p2p-media-loader-core'
   4 import { Engine, initHlsJsPlayer, initVideoJsContribHlsJsPlayer } from '@peertube/p2p-media-loader-hlsjs'
   5 import { timeToInt } from '@shared/core-utils'
   6 import { P2PMediaLoaderPluginOptions, PlayerNetworkInfo } from '../../types'
   7 import { registerConfigPlugin, registerSourceHandler } from './hls-plugin'
   8
   9 registerConfigPlugin(videojs)
  10 registerSourceHandler(videojs)
  11
  12 const Plugin = 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: Hlsjs
  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   private startTime: number
  36
  37   private networkInfoInterval: any
  38
  39   constructor (player: videojs.Player, options?: P2PMediaLoaderPluginOptions) {
  40     super(player)
  41
  42     this.options = options
  43
  44     // FIXME: typings https://github.com/Microsoft/TypeScript/issues/14080
  45     if (!(videojs as any).Html5Hlsjs) {
  46       console.warn('HLS.js does not seem to be supported. Try to fallback to built in HLS.')
  47
  48       if (!player.canPlayType('application/vnd.apple.mpegurl')) {
  49         const message = 'Cannot fallback to built-in HLS'
  50         console.warn(message)
  51
  52         player.ready(() => player.trigger('error', new Error(message)))
  53         return
  54       }
  55     } else {
  56       // FIXME: typings https://github.com/Microsoft/TypeScript/issues/14080
  57       (videojs as any).Html5Hlsjs.addHook('beforeinitialize', (videojsPlayer: any, hlsjs: any) => {
  58         this.hlsjs = hlsjs
  59       })
  60
  61       initVideoJsContribHlsJsPlayer(player)
  62     }
  63
  64     this.startTime = timeToInt(options.startTime)
  65
  66     player.src({
  67       type: options.type,
  68       src: options.src
  69     })
  70
  71     player.ready(() => {
  72       this.initializeCore()
  73
  74       if ((videojs as any).Html5Hlsjs) {
  75         this.initializePlugin()
  76       }
  77     })
  78   }
  79
  80   dispose () {
  81     if (this.hlsjs) this.hlsjs.destroy()
  82     if (this.p2pEngine) this.p2pEngine.destroy()
  83
  84     clearInterval(this.networkInfoInterval)
  85   }
  86
  87   getCurrentLevel () {
  88     return this.hlsjs.levels[this.hlsjs.currentLevel]
  89   }
  90
  91   getLiveLatency () {
  92     return Math.round(this.hlsjs.latency)
  93   }
  94
  95   getHLSJS () {
  96     return this.hlsjs
  97   }
  98
  99   private initializeCore () {
 100     this.player.one('play', () => {
 101       this.player.addClass('vjs-has-big-play-button-clicked')
 102     })
 103
 104     this.player.one('canplay', () => {
 105       if (this.startTime) {
 106         this.player.currentTime(this.startTime)
 107       }
 108     })
 109   }
 110
 111   private initializePlugin () {
 112     initHlsJsPlayer(this.hlsjs)
 113
 114     this.p2pEngine = this.options.loader.getEngine()
 115
 116     this.p2pEngine.on(Events.SegmentError, (segment: Segment, err) => {
 117       console.error('Segment error.', segment, err)
 118
 119       this.options.redundancyUrlManager.removeBySegmentUrl(segment.requestUrl)
 120     })
 121
 122     this.statsP2PBytes.numPeers = 1 + this.options.redundancyUrlManager.countBaseUrls()
 123
 124     this.runStats()
 125   }
 126
 127   private runStats () {
 128     this.p2pEngine.on(Events.PieceBytesDownloaded, (method: string, _segment, bytes: number) => {
 129       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
 130
 131       elem.pendingDownload.push(bytes)
 132       elem.totalDownload += bytes
 133     })
 134
 135     this.p2pEngine.on(Events.PieceBytesUploaded, (method: string, _segment, bytes: number) => {
 136       const elem = method === 'p2p' ? this.statsP2PBytes : this.statsHTTPBytes
 137
 138       elem.pendingUpload.push(bytes)
 139       elem.totalUpload += bytes
 140     })
 141
 142     this.p2pEngine.on(Events.PeerConnect, () => this.statsP2PBytes.numPeers++)
 143     this.p2pEngine.on(Events.PeerClose, () => this.statsP2PBytes.numPeers--)
 144
 145     this.networkInfoInterval = setInterval(() => {
 146       const p2pDownloadSpeed = this.arraySum(this.statsP2PBytes.pendingDownload)
 147       const p2pUploadSpeed = this.arraySum(this.statsP2PBytes.pendingUpload)
 148
 149       const httpDownloadSpeed = this.arraySum(this.statsHTTPBytes.pendingDownload)
 150       const httpUploadSpeed = this.arraySum(this.statsHTTPBytes.pendingUpload)
 151
 152       this.statsP2PBytes.pendingDownload = []
 153       this.statsP2PBytes.pendingUpload = []
 154       this.statsHTTPBytes.pendingDownload = []
 155       this.statsHTTPBytes.pendingUpload = []
 156
 157       return this.player.trigger('p2pInfo', {
 158         source: 'p2p-media-loader',
 159         http: {
 160           downloadSpeed: httpDownloadSpeed,
 161           uploadSpeed: httpUploadSpeed,
 162           downloaded: this.statsHTTPBytes.totalDownload,
 163           uploaded: this.statsHTTPBytes.totalUpload
 164         },
 165         p2p: {
 166           downloadSpeed: p2pDownloadSpeed,
 167           uploadSpeed: p2pUploadSpeed,
 168           numPeers: this.statsP2PBytes.numPeers,
 169           downloaded: this.statsP2PBytes.totalDownload,
 170           uploaded: this.statsP2PBytes.totalUpload
 171         },
 172         bandwidthEstimate: (this.hlsjs as any).bandwidthEstimate / 8
 173       } as PlayerNetworkInfo)
 174     }, this.CONSTANTS.INFO_SCHEDULER)
 175   }
 176
 177   private arraySum (data: number[]) {
 178     return data.reduce((a: number, b: number) => a + b, 0)
 179   }
 180 }
 181
 182 videojs.registerPlugin('p2pMediaLoader', P2pMediaLoaderPlugin)
 183 export { P2pMediaLoaderPlugin }