audiobookshelf/client/players/PlayerHandler.js

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import LocalAudioPlayer from './LocalAudioPlayer'
import LocalVideoPlayer from './LocalVideoPlayer'
import CastPlayer from './CastPlayer'
import AudioTrack from './AudioTrack'
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import VideoTrack from './VideoTrack'
export default class PlayerHandler {
constructor(ctx) {
this.ctx = ctx
this.libraryItem = null
this.episodeId = null
this.displayTitle = null
this.displayAuthor = null
this.playWhenReady = false
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this.initialPlaybackRate = 1
this.player = null
this.playerState = 'IDLE'
this.isHlsTranscode = false
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this.isVideo = false
this.currentSessionId = null
this.startTime = 0
this.lastSyncTime = 0
this.lastSyncedAt = 0
this.listeningTimeSinceSync = 0
this.playInterval = null
}
get isCasting() {
return this.ctx.$store.state.globals.isCasting
}
get libraryItemId() {
return this.libraryItem ? this.libraryItem.id : null
}
get isPlayingCastedItem() {
return this.libraryItem && (this.player instanceof CastPlayer)
}
get isPlayingLocalItem() {
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return this.libraryItem && (this.player instanceof LocalAudioPlayer)
}
get userToken() {
return this.ctx.$store.getters['user/getToken']
}
get playerPlaying() {
return this.playerState === 'PLAYING'
}
get episode() {
if (!this.episodeId) return null
return this.libraryItem.media.episodes.find(ep => ep.id === this.episodeId)
}
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load(libraryItem, episodeId, playWhenReady, playbackRate) {
this.libraryItem = libraryItem
this.episodeId = episodeId
this.playWhenReady = playWhenReady
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this.initialPlaybackRate = playbackRate
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this.isVideo = libraryItem.mediaType === 'video'
if (!this.player) this.switchPlayer(playWhenReady)
else this.prepare()
}
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switchPlayer(playWhenReady) {
if (this.isCasting && !(this.player instanceof CastPlayer)) {
console.log('[PlayerHandler] Switching to cast player')
this.stopPlayInterval()
this.playerStateChange('LOADING')
this.startTime = this.player ? this.player.getCurrentTime() : this.startTime
if (this.player) {
this.player.destroy()
}
this.player = new CastPlayer(this.ctx)
this.setPlayerListeners()
if (this.libraryItem) {
// libraryItem was already loaded - prepare for cast
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this.playWhenReady = playWhenReady
this.prepare()
}
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} else if (!this.isCasting && !(this.player instanceof LocalAudioPlayer) && !(this.player instanceof LocalVideoPlayer)) {
console.log('[PlayerHandler] Switching to local player')
this.stopPlayInterval()
this.playerStateChange('LOADING')
if (this.player) {
this.player.destroy()
}
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if (this.isVideo) {
this.player = new LocalVideoPlayer(this.ctx)
} else {
this.player = new LocalAudioPlayer(this.ctx)
}
this.setPlayerListeners()
if (this.libraryItem) {
// libraryItem was already loaded - prepare for local play
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this.playWhenReady = playWhenReady
this.prepare()
}
}
}
setPlayerListeners() {
this.player.on('stateChange', this.playerStateChange.bind(this))
this.player.on('timeupdate', this.playerTimeupdate.bind(this))
this.player.on('buffertimeUpdate', this.playerBufferTimeUpdate.bind(this))
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this.player.on('error', this.playerError.bind(this))
this.player.on('finished', this.playerFinished.bind(this))
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}
playerError() {
// Switch to HLS stream on error
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if (!this.isCasting && !this.currentStreamId && (this.player instanceof LocalAudioPlayer)) {
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console.log(`[PlayerHandler] Audio player error switching to HLS stream`)
this.prepare(true)
}
}
playerFinished() {
this.stopPlayInterval()
var currentTime = this.player.getCurrentTime()
this.ctx.setCurrentTime(currentTime)
// TODO: Add listening time between last sync and now?
this.sendProgressSync(currentTime)
}
playerStateChange(state) {
console.log('[PlayerHandler] Player state change', state)
this.playerState = state
if (this.playerState === 'PLAYING') {
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this.setPlaybackRate(this.initialPlaybackRate)
this.startPlayInterval()
} else {
this.stopPlayInterval()
}
if (this.playerState === 'LOADED' || this.playerState === 'PLAYING') {
this.ctx.setDuration(this.getDuration())
}
if (this.playerState !== 'LOADING') {
this.ctx.setCurrentTime(this.player.getCurrentTime())
}
this.ctx.setPlaying(this.playerState === 'PLAYING')
this.ctx.playerLoading = this.playerState === 'LOADING'
}
playerTimeupdate(time) {
this.ctx.setCurrentTime(time)
}
playerBufferTimeUpdate(buffertime) {
this.ctx.setBufferTime(buffertime)
}
async prepare(forceTranscode = false) {
var payload = {
supportedMimeTypes: this.player.playableMimeTypes,
mediaPlayer: this.isCasting ? 'chromecast' : 'html5',
forceTranscode,
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forceDirectPlay: this.isCasting || this.isVideo // TODO: add transcode support for chromecast
}
var path = this.episodeId ? `/api/items/${this.libraryItem.id}/play/${this.episodeId}` : `/api/items/${this.libraryItem.id}/play`
var session = await this.ctx.$axios.$post(path, payload).catch((error) => {
console.error('Failed to start stream', error)
})
this.prepareSession(session)
}
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prepareOpenSession(session, playbackRate) { // Session opened on init socket
this.libraryItem = session.libraryItem
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this.isVideo = session.libraryItem.mediaType === 'video'
this.playWhenReady = false
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this.initialPlaybackRate = playbackRate
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if (!this.player) this.switchPlayer()
this.prepareSession(session)
}
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prepareSession(session) {
this.startTime = session.currentTime
this.currentSessionId = session.id
this.displayTitle = session.displayTitle
this.displayAuthor = session.displayAuthor
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console.log('[PlayerHandler] Preparing Session', session)
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if (session.videoTrack) {
var videoTrack = new VideoTrack(session.videoTrack, this.userToken)
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this.ctx.playerLoading = true
this.isHlsTranscode = true
if (session.playMethod === this.ctx.$constants.PlayMethod.DIRECTPLAY) {
this.isHlsTranscode = false
}
this.player.set(this.libraryItem, videoTrack, this.isHlsTranscode, this.startTime, this.playWhenReady)
} else {
var audioTracks = session.audioTracks.map(at => new AudioTrack(at, this.userToken))
this.ctx.playerLoading = true
this.isHlsTranscode = true
if (session.playMethod === this.ctx.$constants.PlayMethod.DIRECTPLAY) {
this.isHlsTranscode = false
}
this.player.set(this.libraryItem, audioTracks, this.isHlsTranscode, this.startTime, this.playWhenReady)
}
// browser media session api
this.ctx.setMediaSession()
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}
closePlayer() {
console.log('[PlayerHandler] Close Player')
this.sendCloseSession()
if (this.player) {
this.player.destroy()
}
this.player = null
this.playerState = 'IDLE'
this.libraryItem = null
this.startTime = 0
this.stopPlayInterval()
}
resetStream(startTime, streamId) {
if (this.isHlsTranscode && this.currentSessionId === streamId) {
this.player.resetStream(startTime)
} else {
console.warn('resetStream mismatch streamId', this.currentSessionId, streamId)
}
}
startPlayInterval() {
clearInterval(this.playInterval)
var lastTick = Date.now()
this.playInterval = setInterval(() => {
// Update UI
if (!this.player) return
var currentTime = this.player.getCurrentTime()
this.ctx.setCurrentTime(currentTime)
var exactTimeElapsed = ((Date.now() - lastTick) / 1000)
lastTick = Date.now()
this.listeningTimeSinceSync += exactTimeElapsed
if (this.listeningTimeSinceSync >= 5) {
this.sendProgressSync(currentTime)
}
}, 1000)
}
sendCloseSession() {
var syncData = null
if (this.player) {
var listeningTimeToAdd = Math.max(0, Math.floor(this.listeningTimeSinceSync))
syncData = {
timeListened: listeningTimeToAdd,
duration: this.getDuration(),
currentTime: this.getCurrentTime()
}
}
this.listeningTimeSinceSync = 0
return this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/close`, syncData, { timeout: 1000 }).catch((error) => {
console.error('Failed to close session', error)
})
}
sendProgressSync(currentTime) {
var diffSinceLastSync = Math.abs(this.lastSyncTime - currentTime)
if (diffSinceLastSync < 1) return
this.lastSyncTime = currentTime
var listeningTimeToAdd = Math.max(0, Math.floor(this.listeningTimeSinceSync))
var syncData = {
timeListened: listeningTimeToAdd,
duration: this.getDuration(),
currentTime
}
this.listeningTimeSinceSync = 0
this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/sync`, syncData, { timeout: 1000 }).catch((error) => {
console.error('Failed to update session progress', error)
})
}
stopPlayInterval() {
clearInterval(this.playInterval)
this.playInterval = null
}
playPause() {
if (this.player) this.player.playPause()
}
play() {
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if (this.player) this.player.play()
}
pause() {
if (this.player) this.player.pause()
}
getCurrentTime() {
return this.player ? this.player.getCurrentTime() : 0
}
getDuration() {
return this.player ? this.player.getDuration() : 0
}
jumpBackward() {
if (!this.player) return
var currentTime = this.getCurrentTime()
this.seek(Math.max(0, currentTime - 10))
}
jumpForward() {
if (!this.player) return
var currentTime = this.getCurrentTime()
this.seek(Math.min(currentTime + 10, this.getDuration()))
}
setVolume(volume) {
if (!this.player) return
this.player.setVolume(volume)
}
setPlaybackRate(playbackRate) {
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this.initialPlaybackRate = playbackRate // Might be loaded from settings before player is started
if (!this.player) return
this.player.setPlaybackRate(playbackRate)
}
seek(time) {
if (!this.player) return
this.player.seek(time, this.playerPlaying)
this.ctx.setCurrentTime(time)
// Update progress if paused
if (!this.playerPlaying) {
this.sendProgressSync(time)
}
}
}