audiobookshelf/client/components/AudioPlayer.vue

<template>
  <div class="w-full -mt-4">
    <div class="w-full relative mb-2">
      <div class="absolute top-0 left-0 w-full h-full bg-red flex items-end pointer-events-none">
        <p ref="currentTimestamp" class="font-mono text-sm text-gray-100 pointer-events-auto">00:00:00</p>
        <p class="font-mono text-sm text-gray-100 pointer-events-auto">&nbsp;/&nbsp;{{ progressPercent }}%</p>
        <div class="flex-grow" />
        <p class="font-mono text-sm text-gray-100 pointer-events-auto">{{ timeRemainingPretty }}</p>
      </div>

      <div v-if="chapters.length" class="absolute right-20 top-0 bottom-0 h-full flex items-end">
        <div class="cursor-pointer text-gray-300" @mousedown.prevent @mouseup.prevent @click.stop="showChapters">
          <span class="material-icons text-3xl">format_list_bulleted</span>
        </div>
      </div>
      <div v-if="showExperimentalFeatures" class="absolute top-0 bottom-0 h-full flex items-end" :class="chapters.length ? ' right-32' : 'right-20'">
        <div class="cursor-pointer text-gray-300" @mousedown.prevent @mouseup.prevent @click.stop="showBookmarks">
          <span class="material-icons" style="font-size: 1.7rem">{{ bookmarks.length ? 'bookmarks' : 'bookmark_border' }}</span>
        </div>
      </div>
      <div class="absolute top-0 bottom-0 h-full flex items-end" :class="!showExperimentalFeatures ? (chapters.length ? ' right-32' : 'right-20') : chapters.length ? ' right-44' : 'right-32'">
        <controls-volume-control ref="volumeControl" v-model="volume" @input="updateVolume" />
      </div>

      <div class="flex pb-2">
        <div class="flex-grow" />
        <template v-if="!loading">
          <div class="cursor-pointer flex items-center justify-center text-gray-300 mr-8" @mousedown.prevent @mouseup.prevent @click.stop="restart">
            <span class="material-icons text-3xl">first_page</span>
          </div>
          <div class="cursor-pointer flex items-center justify-center text-gray-300" @mousedown.prevent @mouseup.prevent @click.stop="backward10">
            <span class="material-icons text-3xl">replay_10</span>
          </div>
          <div class="cursor-pointer p-2 shadow-sm bg-accent flex items-center justify-center rounded-full text-primary mx-8" :class="seekLoading ? 'animate-spin' : ''" @mousedown.prevent @mouseup.prevent @click.stop="playPauseClick">
            <span class="material-icons">{{ seekLoading ? 'autorenew' : isPaused ? 'play_arrow' : 'pause' }}</span>
          </div>
          <div class="cursor-pointer flex items-center justify-center text-gray-300" @mousedown.prevent @mouseup.prevent @click.stop="forward10">
            <span class="material-icons text-3xl">forward_10</span>
          </div>
          <controls-playback-speed-control v-model="playbackRate" @change="playbackRateChanged" />
        </template>
        <template v-else>
          <div class="cursor-pointer p-2 shadow-sm bg-accent flex items-center justify-center rounded-full text-primary mx-8 animate-spin">
            <span class="material-icons">autorenew</span>
          </div>
        </template>

        <div class="flex-grow" />
      </div>
    </div>
    <div class="relative">
      <!-- Track -->
      <div ref="track" class="w-full h-2 bg-gray-700 relative cursor-pointer transform duration-100 hover:scale-y-125 overflow-hidden" @mousemove="mousemoveTrack" @mouseleave="mouseleaveTrack" @click.stop="clickTrack">
        <div ref="readyTrack" class="h-full bg-gray-600 absolute top-0 left-0 pointer-events-none" />
        <div ref="bufferTrack" class="h-full bg-gray-400 absolute top-0 left-0 pointer-events-none" />
        <div ref="playedTrack" class="h-full bg-gray-200 absolute top-0 left-0 pointer-events-none" />
        <div ref="trackCursor" class="h-full w-0.5 bg-gray-50 absolute top-0 left-0 opacity-0 pointer-events-none" />
        <div v-if="loading" class="h-full w-1/4 absolute left-0 top-0 loadingTrack pointer-events-none bg-white bg-opacity-25" />
      </div>
      <div ref="track" class="w-full h-2 relative overflow-hidden">
        <template v-for="(tick, index) in chapterTicks">
          <div :key="index" :style="{ left: tick.left + 'px' }" class="absolute top-0 w-px bg-white bg-opacity-50 h-1 pointer-events-none" />
        </template>
      </div>

      <!-- Hover timestamp -->
      <div ref="hoverTimestamp" class="absolute -top-8 left-0 bg-white text-black rounded-full opacity-0 pointer-events-none">
        <p ref="hoverTimestampText" class="text-xs font-mono text-center px-2 py-0.5 truncate whitespace-nowrap">00:00</p>
      </div>
      <div ref="hoverTimestampArrow" class="absolute -top-3 left-0 bg-white text-black rounded-full opacity-0 pointer-events-none">
        <div class="absolute -bottom-1.5 left-0 right-0 w-full flex justify-center">
          <div class="arrow-down" />
        </div>
      </div>
    </div>

    <audio ref="audio" @pause="paused" @playing="playing" @progress="progress" @timeupdate="timeupdate" @loadeddata="audioLoadedData" />

    <modals-chapters-modal v-model="showChaptersModal" :current-chapter="currentChapter" :chapters="chapters" @select="selectChapter" />
  </div>
</template>

<script>
import Hls from 'hls.js'

export default {
  props: {
    loading: Boolean,
    chapters: {
      type: Array,
      default: () => []
    },
    bookmarks: {
      type: Array,
      default: () => []
    }
  },
  data() {
    return {
      hlsInstance: null,
      staleHlsInstance: null,
      volume: 1,
      playbackRate: 1,
      trackWidth: 0,
      isPaused: true,
      url: null,
      src: null,
      playedTrackWidth: 0,
      bufferTrackWidth: 0,
      readyTrackWidth: 0,
      audioEl: null,
      totalDuration: 0,
      seekedTime: 0,
      seekLoading: false,
      showChaptersModal: false,
      currentTime: 0,
      trackOffsetLeft: 16 // Track is 16px from edge
    }
  },
  computed: {
    token() {
      return this.$store.getters['user/getToken']
    },
    totalDurationPretty() {
      return this.$secondsToTimestamp(this.totalDuration)
    },
    timeRemaining() {
      if (!this.audioEl) return 0
      return this.totalDuration - this.currentTime
    },
    timeRemainingPretty() {
      return '-' + this.$secondsToTimestamp(this.timeRemaining)
    },
    progressPercent() {
      if (!this.totalDuration) return 0
      return Math.round((100 * this.currentTime) / this.totalDuration)
    },
    chapterTicks() {
      return this.chapters.map((chap) => {
        var perc = chap.start / this.totalDuration
        return {
          title: chap.title,
          left: perc * this.trackWidth
        }
      })
    },
    currentChapter() {
      return this.chapters.find((chapter) => chapter.start <= this.currentTime && this.currentTime < chapter.end)
    },
    showExperimentalFeatures() {
      return this.$store.state.showExperimentalFeatures
    }
  },
  methods: {
    selectChapter(chapter) {
      this.seek(chapter.start)
      this.showChaptersModal = false
    },
    selectBookmark(bookmark) {
      if (bookmark) {
        this.seek(bookmark.time)
      }
    },
    seek(time) {
      if (this.loading) {
        return
      }
      if (this.seekLoading) {
        console.error('Already seek loading', this.seekedTime)
        return
      }
      if (!this.audioEl) {
        console.error('No Audio el for seek', time)
        return
      }
      this.seekedTime = time
      this.seekLoading = true

      this.audioEl.currentTime = time

      if (this.$refs.playedTrack) {
        var perc = time / this.audioEl.duration
        var ptWidth = Math.round(perc * this.trackWidth)
        this.$refs.playedTrack.style.width = ptWidth + 'px'
        this.playedTrackWidth = ptWidth

        this.$refs.playedTrack.classList.remove('bg-gray-200')
        this.$refs.playedTrack.classList.add('bg-yellow-300')
      }
    },
    updateVolume(volume) {
      if (this.audioEl) {
        this.audioEl.volume = volume
      }
    },
    updatePlaybackRate(playbackRate) {
      if (this.audioEl) {
        try {
          this.audioEl.playbackRate = playbackRate
          this.audioEl.defaultPlaybackRate = playbackRate
        } catch (error) {
          console.error('Update playback rate failed', error)
        }
      } else {
        console.error('No Audio El updatePlaybackRate')
      }
    },
    playbackRateChanged(playbackRate) {
      this.updatePlaybackRate(playbackRate)
      this.$store.dispatch('user/updateUserSettings', { playbackRate }).catch((err) => {
        console.error('Failed to update settings', err)
      })
    },
    mousemoveTrack(e) {
      var offsetX = e.offsetX
      var time = (offsetX / this.trackWidth) * this.totalDuration
      if (this.$refs.hoverTimestamp) {
        var width = this.$refs.hoverTimestamp.clientWidth
        this.$refs.hoverTimestamp.style.opacity = 1
        var posLeft = offsetX - width / 2
        if (posLeft + width + this.trackOffsetLeft > window.innerWidth) {
          posLeft = window.innerWidth - width - this.trackOffsetLeft
        } else if (posLeft < -this.trackOffsetLeft) {
          posLeft = -this.trackOffsetLeft
        }
        this.$refs.hoverTimestamp.style.left = posLeft + 'px'
      }

      if (this.$refs.hoverTimestampArrow) {
        var width = this.$refs.hoverTimestampArrow.clientWidth
        var posLeft = offsetX - width / 2
        this.$refs.hoverTimestampArrow.style.opacity = 1
        this.$refs.hoverTimestampArrow.style.left = posLeft + 'px'
      }
      if (this.$refs.hoverTimestampText) {
        var hoverText = this.$secondsToTimestamp(time)

        var chapter = this.chapters.find((chapter) => chapter.start <= time && time < chapter.end)
        if (chapter && chapter.title) {
          hoverText += ` - ${chapter.title}`
        }
        this.$refs.hoverTimestampText.innerText = hoverText
      }
      if (this.$refs.trackCursor) {
        this.$refs.trackCursor.style.opacity = 1
        this.$refs.trackCursor.style.left = offsetX - 1 + 'px'
      }
    },
    mouseleaveTrack() {
      if (this.$refs.hoverTimestamp) {
        this.$refs.hoverTimestamp.style.opacity = 0
      }
      if (this.$refs.hoverTimestampArrow) {
        this.$refs.hoverTimestampArrow.style.opacity = 0
      }
      if (this.$refs.trackCursor) {
        this.$refs.trackCursor.style.opacity = 0
      }
    },
    restart() {
      this.seek(0)
      this.$nextTick(this.sendStreamUpdate)
    },
    backward10() {
      var newTime = this.audioEl.currentTime - 10
      newTime = Math.max(0, newTime)
      this.seek(newTime)
    },
    forward10() {
      var newTime = this.audioEl.currentTime + 10
      newTime = Math.min(this.audioEl.duration, newTime)
      this.seek(newTime)
    },
    sendStreamUpdate() {
      if (!this.audioEl) return
      this.$emit('updateTime', this.audioEl.currentTime)
    },
    setStreamReady() {
      this.readyTrackWidth = this.trackWidth
      this.$refs.readyTrack.style.width = this.trackWidth + 'px'
    },
    setChunksReady(chunks, numSegments) {
      var largestSeg = 0
      for (let i = 0; i < chunks.length; i++) {
        var chunk = chunks[i]
        if (typeof chunk === 'string') {
          var chunkRange = chunk.split('-').map((c) => Number(c))
          if (chunkRange.length < 2) continue
          if (chunkRange[1] > largestSeg) largestSeg = chunkRange[1]
        } else if (chunk > largestSeg) {
          largestSeg = chunk
        }
      }
      var percentageReady = largestSeg / numSegments
      var widthReady = Math.round(this.trackWidth * percentageReady)
      if (this.readyTrackWidth === widthReady) return
      this.readyTrackWidth = widthReady
      this.$refs.readyTrack.style.width = widthReady + 'px'
    },
    updateTimestamp() {
      var ts = this.$refs.currentTimestamp
      if (!ts) {
        console.error('No timestamp el')
        return
      }
      if (!this.audioEl) {
        console.error('No Audio El')
        return
      }
      var currTimeClean = this.$secondsToTimestamp(this.audioEl.currentTime)
      ts.innerText = currTimeClean
    },
    clickTrack(e) {
      var offsetX = e.offsetX
      var perc = offsetX / this.trackWidth
      var time = perc * this.audioEl.duration
      if (isNaN(time) || time === null) {
        console.error('Invalid time', perc, time)
        return
      }
      this.seek(time)
    },
    playPauseClick() {
      if (this.isPaused) {
        this.play()
      } else {
        this.pause()
      }
    },
    isValidDuration(duration) {
      if (duration && !isNaN(duration) && duration !== Number.POSITIVE_INFINITY && duration !== Number.NEGATIVE_INFINITY) {
        return true
      }
      return false
    },
    getBufferedRanges() {
      if (!this.audioEl) return []

      const ranges = []
      const seekable = this.audioEl.buffered || []

      let offset = 0

      for (let i = 0, length = seekable.length; i < length; i++) {
        let start = seekable.start(i)
        let end = seekable.end(i)
        if (!this.isValidDuration(start)) {
          start = 0
        }
        if (!this.isValidDuration(end)) {
          end = 0
          continue
        }

        ranges.push({
          start: start + offset,
          end: end + offset
        })
      }
      return ranges
    },
    getLastBufferedTime() {
      var bufferedRanges = this.getBufferedRanges()
      if (!bufferedRanges.length) return 0

      var buff = bufferedRanges.find((buff) => buff.start < this.audioEl.currentTime && buff.end > this.audioEl.currentTime)
      if (buff) return buff.end

      var last = bufferedRanges[bufferedRanges.length - 1]
      return last.end
    },
    progress() {
      if (!this.audioEl) {
        return
      }
      var lastbuff = this.getLastBufferedTime()

      var bufferlen = (lastbuff / this.audioEl.duration) * this.trackWidth
      bufferlen = Math.round(bufferlen)
      if (this.bufferTrackWidth === bufferlen || !this.$refs.bufferTrack) return
      this.$refs.bufferTrack.style.width = bufferlen + 'px'
      this.bufferTrackWidth = bufferlen
    },
    timeupdate() {
      if (!this.$refs.playedTrack) {
        console.error('Invalid no played track ref')
        return
      }
      if (!this.audioEl) {
        console.error('No Audio El')
        return
      }

      if (this.seekLoading) {
        this.seekLoading = false
        if (this.$refs.playedTrack) {
          this.$refs.playedTrack.classList.remove('bg-yellow-300')
          this.$refs.playedTrack.classList.add('bg-gray-200')
        }
      }

      this.updateTimestamp()

      // Send update to server when currentTime > 0
      //   this prevents errors when seeking to position not yet transcoded
      //   seeking to position not yet transcoded will cause audio element to set currentTime to 0
      if (this.audioEl.currentTime) {
        this.sendStreamUpdate()
      }

      this.currentTime = this.audioEl.currentTime

      var perc = this.audioEl.currentTime / this.audioEl.duration
      var ptWidth = Math.round(perc * this.trackWidth)
      if (this.playedTrackWidth === ptWidth) {
        return
      }
      this.$refs.playedTrack.style.width = ptWidth + 'px'
      this.playedTrackWidth = ptWidth
    },
    paused() {
      if (!this.$refs.audio) {
        console.error('No audio on paused()')
        return
      }
      this.isPaused = this.$refs.audio.paused
    },
    playing() {
      if (!this.$refs.audio) {
        console.error('No audio on playing()')
        return
      }
      this.isPaused = this.$refs.audio.paused
    },
    audioLoadedData() {
      this.totalDuration = this.audioEl.duration
      this.$emit('loaded', this.totalDuration)
    },
    set(url, currentTime, playOnLoad = false) {
      if (this.hlsInstance) {
        this.terminateStream()
      }
      if (!this.$refs.audio) {
        console.error('No audio widget')
        return
      }
      this.url = url
      if (process.env.NODE_ENV === 'development') {
        url = `${process.env.serverUrl}${url}`
      }
      this.src = url
      console.log('[AudioPlayer-Set] Set url', url)

      var hlsOptions = {
        startPosition: currentTime || -1,
        xhrSetup: (xhr) => {
          xhr.setRequestHeader('Authorization', `Bearer ${this.token}`)
        }
      }
      // console.log('[AudioPlayer-Set] HLS Config', hlsOptions)
      this.hlsInstance = new Hls(hlsOptions)
      var audio = this.$refs.audio
      audio.volume = this.volume
      audio.defaultPlaybackRate = this.playbackRate

      this.hlsInstance.attachMedia(audio)
      this.hlsInstance.on(Hls.Events.MEDIA_ATTACHED, () => {
        // console.log('[HLS] MEDIA ATTACHED')
        this.hlsInstance.loadSource(url)

        this.hlsInstance.on(Hls.Events.MANIFEST_PARSED, function () {
          console.log('[HLS] Manifest Parsed')
          if (playOnLoad) {
            audio.play()
          }
        })

        this.hlsInstance.on(Hls.Events.ERROR, (e, data) => {
          console.error('[HLS] Error', data.type, data.details, data)
          if (data.details === Hls.ErrorDetails.BUFFER_STALLED_ERROR) {
            console.error('[HLS] BUFFER STALLED ERROR')
          }
        })
        this.hlsInstance.on(Hls.Events.DESTROYING, () => {
          console.log('[HLS] Destroying HLS Instance')
        })
      })
    },
    showChapters() {
      if (!this.chapters.length) return
      this.showChaptersModal = !this.showChaptersModal
    },
    showBookmarks() {
      this.$emit('showBookmarks', this.currentTime)
    },
    play() {
      if (!this.$refs.audio) {
        console.error('No Audio ref')
        return
      }
      this.$refs.audio.play()
    },
    pause() {
      if (!this.$refs.audio) return
      this.$refs.audio.pause()
    },
    terminateStream() {
      if (this.hlsInstance) {
        if (!this.hlsInstance.destroy) {
          console.error('HLS Instance has no destroy property', this.hlsInstance)
          return
        }
        this.staleHlsInstance = this.hlsInstance
        this.staleHlsInstance.destroy()
        this.hlsInstance = null
      }
    },
    async resetStream(startTime) {
      if (this.$refs.audio) this.$refs.audio.pause()
      this.terminateStream()
      await new Promise((resolve) => setTimeout(resolve, 1000))
      console.log('Waited 1 second after terminating stream to start again')
      this.set(this.url, startTime, true)
    },
    init() {
      this.playbackRate = this.$store.getters['user/getUserSetting']('playbackRate') || 1

      this.audioEl = this.$refs.audio
      this.setTrackWidth()
    },
    setTrackWidth() {
      if (this.$refs.track) {
        this.trackWidth = this.$refs.track.clientWidth
      } else {
        console.error('Track not loaded', this.$refs)
      }
    },
    settingsUpdated(settings) {
      if (settings.playbackRate && this.playbackRate !== settings.playbackRate) {
        this.updatePlaybackRate(settings.playbackRate)
      }
    },
    volumeUp() {
      if (this.volume >= 1) return
      this.volume = Math.min(1, this.volume + 0.1)
      this.updateVolume(this.volume)
    },
    volumeDown() {
      if (this.volume <= 0) return
      this.volume = Math.max(0, this.volume - 0.1)
      this.updateVolume(this.volume)
    },
    toggleMute() {
      if (this.$refs.volumeControl && this.$refs.volumeControl.toggleMute) {
        this.$refs.volumeControl.toggleMute()
      }
    },
    increasePlaybackRate() {
      var rates = [0.25, 0.5, 0.8, 1, 1.3, 1.5, 2, 2.5, 3]
      var currentRateIndex = rates.findIndex((r) => r === this.playbackRate)
      if (currentRateIndex >= rates.length - 1) return
      this.playbackRate = rates[currentRateIndex + 1] || 1
      this.playbackRateChanged(this.playbackRate)
    },
    decreasePlaybackRate() {
      var rates = [0.25, 0.5, 0.8, 1, 1.3, 1.5, 2, 2.5, 3]
      var currentRateIndex = rates.findIndex((r) => r === this.playbackRate)
      if (currentRateIndex <= 0) return
      this.playbackRate = rates[currentRateIndex - 1] || 1
      this.playbackRateChanged(this.playbackRate)
    },
    closePlayer() {
      if (this.loading) return
      this.$emit('close')
    },
    hotkey(action) {
      if (action === this.$hotkeys.AudioPlayer.PLAY_PAUSE) this.playPauseClick()
      else if (action === this.$hotkeys.AudioPlayer.JUMP_FORWARD) this.forward10()
      else if (action === this.$hotkeys.AudioPlayer.JUMP_BACKWARD) this.backward10()
      else if (action === this.$hotkeys.AudioPlayer.VOLUME_UP) this.volumeUp()
      else if (action === this.$hotkeys.AudioPlayer.VOLUME_DOWN) this.volumeDown()
      else if (action === this.$hotkeys.AudioPlayer.MUTE_UNMUTE) this.toggleMute()
      else if (action === this.$hotkeys.AudioPlayer.SHOW_CHAPTERS) this.showChapters()
      else if (action === this.$hotkeys.AudioPlayer.INCREASE_PLAYBACK_RATE) this.increasePlaybackRate()
      else if (action === this.$hotkeys.AudioPlayer.DECREASE_PLAYBACK_RATE) this.decreasePlaybackRate()
      else if (action === this.$hotkeys.AudioPlayer.CLOSE) this.closePlayer()
    },
    windowResize() {
      this.setTrackWidth()
    }
  },
  mounted() {
    window.addEventListener('resize', this.windowResize)
    this.$store.commit('user/addSettingsListener', { id: 'audioplayer', meth: this.settingsUpdated })
    this.init()
    this.$eventBus.$on('player-hotkey', this.hotkey)
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.windowResize)
    this.$store.commit('user/removeSettingsListener', 'audioplayer')
    this.$eventBus.$off('player-hotkey', this.hotkey)
  }
}
</script>

<style>
.loadingTrack {
  animation-name: loadingTrack;
  animation-duration: 1s;
  animation-iteration-count: infinite;
}
@keyframes loadingTrack {
  0% {
    left: -25%;
  }
  100% {
    left: 100%;
  }
}
</style>