client/src/standalone/videos/embed-api.ts

   1 import './embed.scss'
   2
   3 import * as Channel from 'jschannel'
   4 import { PeerTubeResolution, PeerTubeTextTrack } from '../player/definitions'
   5 import { PeerTubeEmbed } from './embed'
   6
   7 /**
   8  * Embed API exposes control of the embed player to the outside world via
   9  * JSChannels and window.postMessage
  10  */
  11 export class PeerTubeEmbedApi {
  12   private channel: Channel.MessagingChannel
  13   private isReady = false
  14   private resolutions: PeerTubeResolution[] = []
  15
  16   constructor (private embed: PeerTubeEmbed) {
  17   }
  18
  19   initialize () {
  20     this.constructChannel()
  21     this.setupStateTracking()
  22
  23     // We're ready!
  24
  25     this.notifyReady()
  26   }
  27
  28   private get element () {
  29     return this.embed.videoElement
  30   }
  31
  32   private constructChannel () {
  33     const channel = Channel.build({ window: window.parent, origin: '*', scope: this.embed.scope })
  34
  35     channel.bind('play', (txn, params) => this.embed.player.play())
  36     channel.bind('pause', (txn, params) => this.embed.player.pause())
  37     channel.bind('seek', (txn, time) => this.embed.player.currentTime(time))
  38
  39     channel.bind('setVolume', (txn, value) => this.embed.player.volume(value))
  40     channel.bind('getVolume', (txn, value) => this.embed.player.volume())
  41
  42     channel.bind('isReady', (txn, params) => this.isReady)
  43
  44     channel.bind('setResolution', (txn, resolutionId) => this.setResolution(resolutionId))
  45     channel.bind('getResolutions', (txn, params) => this.resolutions)
  46
  47     channel.bind('getCaptions', (txn, params) => this.getCaptions())
  48     channel.bind('setCaption', (txn, id) => this.setCaption(id)),
  49
  50     channel.bind('setPlaybackRate', (txn, playbackRate) => this.embed.player.playbackRate(playbackRate))
  51     channel.bind('getPlaybackRate', (txn, params) => this.embed.player.playbackRate())
  52     channel.bind('getPlaybackRates', (txn, params) => this.embed.player.options_.playbackRates)
  53     this.channel = channel
  54   }
  55
  56   private setResolution (resolutionId: number) {
  57     console.log('set resolution %d', resolutionId)
  58
  59     if (this.isWebtorrent()) {
  60       if (resolutionId === -1 && this.embed.player.webtorrent().isAutoResolutionPossible() === false) return
  61
  62       // Auto resolution
  63       if (resolutionId === -1) {
  64         this.embed.player.webtorrent().enableAutoResolution()
  65         return
  66       }
  67
  68       this.embed.player.webtorrent().disableAutoResolution()
  69       this.embed.player.webtorrent().updateResolution(resolutionId)
  70
  71       return
  72     }
  73
  74     this.embed.player.p2pMediaLoader().getHLSJS().nextLevel = resolutionId
  75   }
  76
  77   private getCaptions (): PeerTubeTextTrack[] {
  78     return this.embed.player.textTracks().tracks_.map(t => {
  79       return {
  80         id: t.id,
  81         src: t.src,
  82         label: t.label,
  83         mode: t.mode as any
  84       }
  85     })
  86   }
  87
  88   private setCaption (id: string) {
  89     const tracks = this.embed.player.textTracks().tracks_
  90
  91     for (const track of tracks) {
  92       if (track.id === id) track.mode = 'showing'
  93       else track.mode = 'disabled'
  94     }
  95   }
  96
  97   /**
  98    * Let the host know that we're ready to go!
  99    */
 100   private notifyReady () {
 101     this.isReady = true
 102     this.channel.notify({ method: 'ready', params: true })
 103   }
 104
 105   private setupStateTracking () {
 106     let currentState: 'playing' | 'paused' | 'unstarted' | 'ended' = 'unstarted'
 107
 108     setInterval(() => {
 109       const position = this.element.currentTime
 110       const volume = this.element.volume
 111       const duration = this.element.duration
 112
 113       this.channel.notify({
 114         method: 'playbackStatusUpdate',
 115         params: {
 116           position,
 117           volume,
 118           duration: this.embed.player.duration(),
 119           playbackState: currentState
 120         }
 121       })
 122     }, 500)
 123
 124     this.element.addEventListener('play', ev => {
 125       currentState = 'playing'
 126       this.channel.notify({ method: 'playbackStatusChange', params: 'playing' })
 127     })
 128
 129     this.element.addEventListener('pause', ev => {
 130       currentState = 'paused'
 131       this.channel.notify({ method: 'playbackStatusChange', params: 'paused' })
 132     })
 133
 134     this.element.addEventListener('ended', ev => {
 135       currentState = 'ended'
 136       this.channel.notify({ method: 'playbackStatusChange', params: 'ended' })
 137     })
 138
 139     // PeerTube specific capabilities
 140
 141     if (this.isWebtorrent()) {
 142       this.embed.player.webtorrent().on('autoResolutionUpdate', () => this.loadWebTorrentResolutions())
 143       this.embed.player.webtorrent().on('videoFileUpdate', () => this.loadWebTorrentResolutions())
 144     } else {
 145       this.embed.player.p2pMediaLoader().on('resolutionChange', () => this.loadP2PMediaLoaderResolutions())
 146     }
 147
 148     this.embed.player.on('volumechange', () => {
 149       this.channel.notify({
 150         method: 'volumeChange',
 151         params: this.embed.player.volume()
 152       })
 153     })
 154   }
 155
 156   private loadWebTorrentResolutions () {
 157     this.resolutions = []
 158
 159     const currentResolutionId = this.embed.player.webtorrent().getCurrentResolutionId()
 160
 161     for (const videoFile of this.embed.player.webtorrent().videoFiles) {
 162       let label = videoFile.resolution.label
 163       if (videoFile.fps && videoFile.fps >= 50) {
 164         label += videoFile.fps
 165       }
 166
 167       this.resolutions.push({
 168         id: videoFile.resolution.id,
 169         label,
 170         src: videoFile.magnetUri,
 171         active: videoFile.resolution.id === currentResolutionId,
 172         height: videoFile.resolution.id
 173       })
 174     }
 175
 176     this.channel.notify({
 177       method: 'resolutionUpdate',
 178       params: this.resolutions
 179     })
 180   }
 181
 182   private loadP2PMediaLoaderResolutions () {
 183     this.resolutions = []
 184
 185     const qualityLevels = this.embed.player.qualityLevels()
 186     const currentResolutionId = this.embed.player.qualityLevels().selectedIndex
 187
 188     for (let i = 0; i < qualityLevels.length; i++) {
 189       const level = qualityLevels[i]
 190
 191       this.resolutions.push({
 192         id: level.id,
 193         label: level.height + 'p',
 194         active: level.id === currentResolutionId,
 195         width: level.width,
 196         height: level.height
 197       })
 198     }
 199
 200     this.channel.notify({
 201       method: 'resolutionUpdate',
 202       params: this.resolutions
 203     })
 204   }
 205
 206   private isWebtorrent () {
 207     return this.embed.player.webtorrent
 208   }
 209 }