feat: 再重构
手作代码，从零重写，真正的犟人精神
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SHA256:rVnhx3DAKjujCwWE13aDl7uV6+9U1MvydLkNRXJrBiA
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@ -9,6 +9,7 @@ import { gsap } from 'gsap'
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import apis from '../apis'
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import { artistsOrganize } from '../utils'
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import { usePlayQueueStore } from '../stores/usePlayQueueStore'
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import { usePlayState } from '../stores/usePlayState'
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import TrackItem from './TrackItem.vue'
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import LoadingIndicator from '../assets/icons/loadingindicator.vue'
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import { debugUI } from '../utils/debug'
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@ -138,6 +139,7 @@ watch(
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)
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const playQueue = usePlayQueueStore()
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const playState = usePlayState()
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async function playTheAlbum(from: number = 0) {
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let newQueue = []
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@ -148,7 +150,7 @@ async function playTheAlbum(from: number = 0) {
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})
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}
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await playQueue.replaceQueue(newQueue)
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await playQueue.togglePlay(true)
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await playState.togglePlay(true)
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}
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function shuffle() {
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@ -1,275 +1,180 @@
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<script setup lang="ts">
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import { usePlayQueueStore } from '../stores/usePlayQueueStore'
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import { WebAudioGaplessPlayer } from '../utils/webAudioPlayer'
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import { usePlayState } from '../stores/usePlayState'
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import { debugPlayer } from '../utils/debug'
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import { watch, ref, onMounted, onUnmounted } from 'vue'
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import artistsOrganize from '../utils/artistsOrganize'
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const playQueue = usePlayQueueStore()
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const player = ref<WebAudioGaplessPlayer | null>(null)
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const isInitialized = ref(false)
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const currentTrackIndex = ref(-1)
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const playState = usePlayState()
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const playerInstance = ref<WebAudioPlayer | null>(null)
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class WebAudioPlayer {
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context: AudioContext
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audioBuffer: { [key: string]: AudioBuffer}
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dummyAudio: HTMLAudioElement
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constructor() {
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this.context = new window.AudioContext()
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this.audioBuffer = {}
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// 创建一个隐藏的 HTML Audio 元素来帮助同步媒体会话状态
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this.dummyAudio = new Audio()
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this.dummyAudio.style.display = 'none'
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this.dummyAudio.loop = true
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this.dummyAudio.volume = 0.001 // 极小音量
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// 使用一个很短的静音音频文件，或者生成一个
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this.createSilentAudioBlob()
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document.body.appendChild(this.dummyAudio)
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this.initMediaSession()
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}
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createSilentAudioBlob() {
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// 创建一个1秒的静音WAV文件
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const sampleRate = 44100
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const channels = 1
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const length = sampleRate * 1 // 1秒
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const arrayBuffer = new ArrayBuffer(44 + length * 2)
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const view = new DataView(arrayBuffer)
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// WAV 文件头
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const writeString = (offset: number, string: string) => {
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for (let i = 0; i < string.length; i++) {
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view.setUint8(offset + i, string.charCodeAt(i))
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}
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}
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writeString(0, 'RIFF')
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view.setUint32(4, 36 + length * 2, true)
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writeString(8, 'WAVE')
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writeString(12, 'fmt ')
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view.setUint32(16, 16, true)
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view.setUint16(20, 1, true)
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view.setUint16(22, channels, true)
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view.setUint32(24, sampleRate, true)
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view.setUint32(28, sampleRate * 2, true)
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view.setUint16(32, 2, true)
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view.setUint16(34, 16, true)
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writeString(36, 'data')
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view.setUint32(40, length * 2, true)
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// 静音数据（全零）
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for (let i = 0; i < length; i++) {
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view.setInt16(44 + i * 2, 0, true)
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}
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const blob = new Blob([arrayBuffer], { type: 'audio/wav' })
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this.dummyAudio.src = URL.createObjectURL(blob)
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}
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initMediaSession() {
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if ('mediaSession' in navigator) {
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navigator.mediaSession.setActionHandler('play', () => {
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console.log('Media session: play requested')
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this.play()
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})
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navigator.mediaSession.setActionHandler('pause', () => {
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console.log('Media session: pause requested')
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this.pause()
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})
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navigator.mediaSession.setActionHandler('stop', () => {
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console.log('Media session: stop requested')
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this.stop()
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})
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}
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}
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async loadResourceAndPlay() {
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try {
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debugPlayer("从播放器实例内部获取播放项目：")
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debugPlayer(`目前播放：${playQueue.currentTrack?.song.cid ?? "空"}`)
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debugPlayer(`上一首：${playQueue.previousTrack?.song.cid ?? "空"}`)
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debugPlayer(`下一首：${playQueue.nextTrack?.song.cid ?? "空"}`)
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if (playQueue.queue.length === 0) {
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// TODO: 如果当前正在播放，则可能需要停止播放
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}
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// 将音频 buffer 加载到缓存空间
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const loadBuffer = async (track: QueueItem) => {
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if (this.audioBuffer[track.song.cid]) return // 已经缓存了，直接跳
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const response = await fetch(track.sourceUrl ?? "")
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const arrayBuffer = await response.arrayBuffer()
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const audioBuffer = await this.context.decodeAudioData(arrayBuffer)
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this.audioBuffer[track.song.cid] = audioBuffer
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}
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if (playQueue.currentTrack){
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await loadBuffer(playQueue.currentTrack)
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this.play()
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}
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if (playQueue.nextTrack)
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await loadBuffer(playQueue.nextTrack)
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if (playQueue.previousTrack)
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await loadBuffer(playQueue.previousTrack)
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debugPlayer("缓存完成")
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} catch (error) {
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console.error('播放失败:', error)
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}
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}
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// 从头播放
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async play() {
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debugPlayer("开始播放")
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const source = this.context.createBufferSource()
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source.buffer = this.audioBuffer[playQueue.currentTrack.song.cid]
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source.connect(this.context.destination)
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source.start()
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}
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pause() {}
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resume() {}
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stop() {
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}
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togglePlay() {
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}
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getCurrentTime() {
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}
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updateMediaSessionState() {
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}
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// 定期更新播放位置
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startPositionUpdates() {
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}
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// 清理资源
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destroy() {
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}
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}
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// 初始化 Web Audio 播放器
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onMounted(() => {
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player.value = new WebAudioGaplessPlayer()
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// 注册事件回调
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player.value.onTrackStart((index) => {
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debugPlayer(`Track ${index} started`)
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currentTrackIndex.value = index
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// 更新 store 中的当前播放索引
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playQueue.toggleQueuePlay(index)
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// 更新媒体会话
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const track = playQueue.queue[index]
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if (track) {
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updateMediaSession(track)
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}
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playerInstance.value = new WebAudioPlayer()
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})
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player.value.onTrackEnd((index) => {
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debugPlayer(`Track ${index} ended`)
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// 根据循环模式处理
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if (playQueue.loopMode === 'single') {
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// 单曲循环：重新播放当前曲目
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player.value?.seekToTrack(index)
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} else if (index === playQueue.queue.length - 1) {
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// 最后一首歌
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if (playQueue.loopMode === 'all') {
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// 列表循环：从头开始
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player.value?.seekToTrack(0)
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} else {
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// 停止播放
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playQueue.togglePlay(false)
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}
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} else {
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// 立即播放下一首歌
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player.value?.playNext()
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}
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})
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isInitialized.value = true
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// 设置媒体会话处理器
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setupMediaSessionHandlers()
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})
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// 销毁播放器
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onUnmounted(() => {
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if (player.value) {
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player.value.destroy()
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player.value = null
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}
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})
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// 监听播放队列变化
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watch(
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() => playQueue.queue,
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async (newQueue) => {
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if (!player.value || !isInitialized.value) return
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debugPlayer('Queue changed, rebuilding Web Audio queue')
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// 清空当前队列
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player.value.clearQueue()
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currentTrackIndex.value = -1
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// 添加所有曲目到 Web Audio 队列
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for (const track of newQueue) {
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if (track.song.sourceUrl) {
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await player.value.addTrack(track.song.sourceUrl, {
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cid: track.song.cid,
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name: track.song.name,
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artists: track.song.artists,
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album: track.album,
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})
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}
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}
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debugPlayer(`Added ${newQueue.length} tracks to Web Audio queue`)
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},
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{ deep: true },
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)
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// 监听播放状态变化
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watch(
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() => playQueue.isPlaying,
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async (isPlaying) => {
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if (!player.value || !isInitialized.value) return
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if (isPlaying) {
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debugPlayer('Starting playback')
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// 如果是从暂停恢复
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const position = player.value.getCurrentPosition()
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if (position && position.trackTime > 0) {
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await player.value.resume()
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} else {
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// 从当前索引开始播放
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await player.value.play(playQueue.currentIndex)
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}
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} else {
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debugPlayer('Pausing playback')
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player.value.pause()
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}
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},
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)
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// 监听当前曲目变化（用户手动切换）
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watch(
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() => playQueue.currentIndex,
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async (newIndex, oldIndex) => {
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if (!player.value || !isInitialized.value) return
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// 如果是 Web Audio 触发的变化，跳过
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if (newIndex === currentTrackIndex.value) return
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debugPlayer(`User requested track change: ${oldIndex} -> ${newIndex}`)
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// 跳转到指定曲目
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await player.value.seekToTrack(newIndex)
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currentTrackIndex.value = newIndex
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},
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)
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// 监听音量变化（如果有音量控制）
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// Note: volume control not implemented in current store, default to 1
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watch(
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() => isInitialized.value,
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(initialized) => {
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if (initialized && player.value) {
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player.value.setVolume(1)
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}
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},
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{ immediate: true },
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)
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// 更新媒体会话信息
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function updateMediaSession(track: QueueItem) {
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if (!('mediaSession' in navigator)) return
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console.log('Updating media session for:', track.song.name)
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navigator.mediaSession.metadata = new MediaMetadata({
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title: track.song.name,
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artist: artistsOrganize(track.song.artists ?? []),
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album: track.album?.name,
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artwork: [
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{
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src: track.album?.coverUrl ?? '',
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sizes: '500x500',
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type: 'image/png',
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},
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],
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})
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// 设置播放状态
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navigator.mediaSession.playbackState = playQueue.isPlaying ? 'playing' : 'paused'
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}
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// 初始化媒体会话处理器（只需要设置一次）
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function setupMediaSessionHandlers() {
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if (!('mediaSession' in navigator)) return
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console.log('Setting up media session handlers')
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navigator.mediaSession.setActionHandler('play', () => {
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console.log('Media session: play')
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playQueue.togglePlay(true)
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})
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navigator.mediaSession.setActionHandler('pause', () => {
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console.log('Media session: pause')
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playQueue.togglePlay(false)
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})
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navigator.mediaSession.setActionHandler('previoustrack', () => {
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console.log('Media session: previous')
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const prevIndex = Math.max(0, playQueue.currentIndex - 1)
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playQueue.toggleQueuePlay(prevIndex)
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})
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navigator.mediaSession.setActionHandler('nexttrack', () => {
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console.log('Media session: next')
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playQueue.skipToNext()
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})
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}
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// 定期报告播放进度
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let progressInterval: number | null = null
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watch(
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() => playQueue.isPlaying,
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(isPlaying) => {
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// 同步媒体会话播放状态
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if ('mediaSession' in navigator) {
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navigator.mediaSession.playbackState = isPlaying ? 'playing' : 'paused'
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}
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if (isPlaying) {
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// 开始定期报告进度
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progressInterval = window.setInterval(() => {
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if (!player.value) return
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const position = player.value.getCurrentPosition()
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if (position) {
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playQueue.reportPlayProgress(position.trackTime)
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// 更新媒体会话位置信息
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if ('mediaSession' in navigator && 'setPositionState' in navigator.mediaSession) {
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const currentTrack = playQueue.queue[position.trackIndex]
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if (currentTrack) {
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try {
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navigator.mediaSession.setPositionState({
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duration: currentTrack.song.duration || 0,
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playbackRate: 1.0,
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position: position.trackTime,
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})
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} catch (error) {
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// 某些浏览器可能不支持 setPositionState
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console.debug('Media session setPositionState not supported:', error)
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}
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}
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}
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}
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}, 100) // 每100ms更新一次
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} else {
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// 停止报告进度
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if (progressInterval !== null) {
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clearInterval(progressInterval)
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progressInterval = null
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}
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}
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},
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)
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// 清理定时器
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onUnmounted(() => {
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if (progressInterval !== null) {
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clearInterval(progressInterval)
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}
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watch(() => playQueue.currentTrack, () => {
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debugPlayer(`检测到当前播放曲目更新`)
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playerInstance.value?.loadResourceAndPlay()
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})
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</script>
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<template>
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<!-- Web Audio Player 不需要 DOM 元素 -->
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<div class="web-audio-player" v-show="false">
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<div v-if="!isInitialized" class="text-white">
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Initializing Web Audio Player...
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</div>
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<div v-else class="text-white">
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Web Audio Player Ready ({{ playQueue.queue.length }} tracks)
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</div>
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</div>
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</template>
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<style scoped>
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.web-audio-player {
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position: absolute;
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pointer-events: none;
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opacity: 0;
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z-index: -1;
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}
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</style>
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|
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@ -1,6 +1,7 @@
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import { defineStore } from 'pinia'
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import { ref, computed } from 'vue'
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import { debugStore } from '../utils/debug'
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import apis from '../apis'
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export const usePlayQueueStore = defineStore('queue', () => {
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// 内部状态
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@ -10,8 +11,6 @@ export const usePlayQueueStore = defineStore('queue', () => {
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const queueReplaceLock = ref(false)
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const currentPlaying = ref(0) // 当前播放指针，指针在 queueOrder 中寻址（无论是否开启了随机播放）
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const queueOrder = ref<number[]>([]) // 播放队列顺序
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const isPlaying = ref(false)
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const playProgress = ref(0) // 当前曲目的播放时间指针
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// 暴露给外部的响应式只读引用
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const queueState = computed(() =>
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|
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@ -29,18 +28,27 @@ export const usePlayQueueStore = defineStore('queue', () => {
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return queue.value[actualIndex] || null
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})
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// 获取当前播放时间
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const playProgressState = computed(() => playProgress.value)
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// 获取上一曲目
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const previousTrack = computed(() => {
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const actualIndex = queueOrder.value[currentPlaying.value - 1]
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return queue.value[actualIndex] || null
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})
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// 获取当前是否正在播放
|
||||
const playingState = computed(() => isPlaying.value)
|
||||
// 获取下一曲目
|
||||
const nextTrack = computed(() => {
|
||||
const actualIndex = queueOrder.value[currentPlaying.value + 1]
|
||||
return queue.value[actualIndex] || null
|
||||
})
|
||||
|
||||
/************
|
||||
* 播放队列相关
|
||||
***********/
|
||||
// 使用新队列替换老队列
|
||||
// 队列替换锁开启时启用确认，确认后重置该锁
|
||||
async function replaceQueue(newQueue: QueueItem[]) {
|
||||
async function replaceQueue(newQueue: {
|
||||
song: Song,
|
||||
album?: Album
|
||||
}[]) {
|
||||
if (queueReplaceLock.value) {
|
||||
if (
|
||||
!confirm(
|
||||
|
|
@ -53,13 +61,32 @@ export const usePlayQueueStore = defineStore('queue', () => {
|
|||
queueReplaceLock.value = false
|
||||
}
|
||||
|
||||
// 将新队列替换已有队列
|
||||
queue.value = newQueue
|
||||
|
||||
// 初始化播放顺序
|
||||
queueOrder.value = Array.from({ length: newQueue.length }, (_, i) => i)
|
||||
// 以空队列向外部监听器回报队列已被修改
|
||||
queue.value = []
|
||||
queueOrder.value = []
|
||||
currentPlaying.value = 0
|
||||
|
||||
// 获取最新资源地址
|
||||
let newQueueWithUrl: QueueItem[] = []
|
||||
|
||||
for (const track of newQueue) {
|
||||
const res = await apis.getSong(track.song.cid)
|
||||
newQueueWithUrl[newQueueWithUrl.length] = {
|
||||
song: track.song,
|
||||
album: track.album,
|
||||
sourceUrl: res.sourceUrl ?? "",
|
||||
lyricUrl: res.lyricUrl
|
||||
}
|
||||
}
|
||||
|
||||
debugStore(newQueueWithUrl)
|
||||
|
||||
// 将新队列替换已有队列
|
||||
queue.value = newQueueWithUrl
|
||||
|
||||
// 正式初始化播放顺序
|
||||
queueOrder.value = Array.from({ length: newQueue.length }, (_, i) => i)
|
||||
|
||||
// 关闭随机播放和循环（外部可在此方法执行完毕后再更新播放模式）
|
||||
isShuffle.value = false
|
||||
loopingMode.value = 'off'
|
||||
|
|
@ -68,12 +95,6 @@ export const usePlayQueueStore = defineStore('queue', () => {
|
|||
/***********
|
||||
* 播放控制相关
|
||||
**********/
|
||||
// 控制播放
|
||||
const togglePlay = (turnTo?: boolean) => {
|
||||
const newPlayState = turnTo ?? !isPlaying.value
|
||||
if (newPlayState === isPlaying.value) return
|
||||
isPlaying.value = newPlayState
|
||||
}
|
||||
|
||||
// 跳转至队列的某首歌曲
|
||||
const toggleQueuePlay = (turnTo: number) => {
|
||||
|
|
@ -90,15 +111,10 @@ export const usePlayQueueStore = defineStore('queue', () => {
|
|||
// 通常为当前曲目播放完毕，需要通过循环模式判断应该重置进度或队列指针 +1
|
||||
const continueToNext = () => {
|
||||
debugStore(loopingMode.value)
|
||||
// TODO: 需要留意 progress seeking 相关
|
||||
if (loopingMode.value === 'single') playProgress.value = 0
|
||||
else currentPlaying.value = currentPlaying.value + 1
|
||||
// 注意：单曲循环时的进度重置需要在播放状态管理中处理
|
||||
if (loopingMode.value !== 'single') {
|
||||
currentPlaying.value = currentPlaying.value + 1
|
||||
}
|
||||
|
||||
// 回报播放进度
|
||||
const reportPlayProgress = (progress: number) => {
|
||||
debugStore(`进度更新回报: ${progress}`)
|
||||
playProgress.value = progress
|
||||
}
|
||||
|
||||
/************
|
||||
|
|
@ -178,17 +194,15 @@ export const usePlayQueueStore = defineStore('queue', () => {
|
|||
loopMode: loopModeState,
|
||||
currentTrack,
|
||||
currentIndex: currentPlaying,
|
||||
isPlaying: playingState,
|
||||
playProgress: playProgressState,
|
||||
previousTrack,
|
||||
nextTrack,
|
||||
|
||||
// 修改方法
|
||||
replaceQueue,
|
||||
toggleShuffle,
|
||||
toggleLoop,
|
||||
togglePlay,
|
||||
toggleQueuePlay,
|
||||
skipToNext,
|
||||
continueToNext,
|
||||
reportPlayProgress,
|
||||
}
|
||||
})
|
||||
|
|
|
|||
203
src/stores/usePlayState.ts
Normal file
203
src/stores/usePlayState.ts
Normal file
|
|
@ -0,0 +1,203 @@
|
|||
import { defineStore } from 'pinia'
|
||||
import { ref, computed, watch } from 'vue'
|
||||
import { debugStore } from '../utils/debug'
|
||||
import artistsOrganize from '../utils/artistsOrganize'
|
||||
|
||||
export const usePlayState = defineStore('playState', () => {
|
||||
// 播放状态
|
||||
const isPlaying = ref(false)
|
||||
const playProgress = ref(0) // 播放进度
|
||||
const currentTrackDuration = ref(0) // 曲目总时长
|
||||
const currentTrack = ref<QueueItem | null>(null) // 当前播放的曲目
|
||||
const mediaSessionInitialized = ref(false)
|
||||
|
||||
// 外显播放状态方法
|
||||
const playingState = computed(() => isPlaying.value)
|
||||
const playProgressState = computed(() => playProgress.value)
|
||||
const trackDurationState = computed(() => currentTrackDuration.value)
|
||||
|
||||
// 回报目前播放进度百分比
|
||||
const playProgressPercent = computed(() => {
|
||||
if (currentTrackDuration.value === 0) return 0
|
||||
return Math.min(playProgress.value / currentTrackDuration.value, 1)
|
||||
})
|
||||
|
||||
// 回报剩余时间
|
||||
const remainingTime = computed(() => {
|
||||
return Math.max(currentTrackDuration.value - playProgress.value, 0)
|
||||
})
|
||||
|
||||
/***********
|
||||
* 修改状态
|
||||
**********/
|
||||
// 触发播放
|
||||
const togglePlay = (turnTo?: boolean) => {
|
||||
const newPlayState = turnTo ?? !isPlaying.value
|
||||
if (newPlayState === isPlaying.value) return
|
||||
isPlaying.value = newPlayState
|
||||
debugStore(`播放状态更新: ${newPlayState}`)
|
||||
}
|
||||
|
||||
// 回报播放位置
|
||||
const reportPlayProgress = (progress: number) => {
|
||||
debugStore(`播放位置回报: ${progress}`)
|
||||
playProgress.value = progress
|
||||
}
|
||||
|
||||
// 回报曲目进度
|
||||
const setCurrentTrackDuration = (duration: number) => {
|
||||
debugStore(`曲目进度回报: ${duration}`)
|
||||
currentTrackDuration.value = duration
|
||||
}
|
||||
|
||||
// 重置播放进度
|
||||
const resetProgress = () => {
|
||||
debugStore('重置播放进度')
|
||||
playProgress.value = 0
|
||||
}
|
||||
|
||||
// 用户触发进度条跳转
|
||||
const seekTo = (time: number) => {
|
||||
const clampedTime = Math.max(0, Math.min(time, currentTrackDuration.value))
|
||||
debugStore(`进度条跳转: ${clampedTime}`)
|
||||
playProgress.value = clampedTime
|
||||
}
|
||||
|
||||
/***********
|
||||
* 媒体会话管理
|
||||
**********/
|
||||
// 设置当前播放曲目
|
||||
const setCurrentTrack = (track: QueueItem | null) => {
|
||||
debugStore('设置当前曲目:', track?.song.name || 'null')
|
||||
currentTrack.value = track
|
||||
if (track) {
|
||||
updateMediaSession(track)
|
||||
}
|
||||
}
|
||||
|
||||
// 初始化媒体会话处理器
|
||||
const setupMediaSessionHandlers = () => {
|
||||
if (!('mediaSession' in navigator) || mediaSessionInitialized.value) return
|
||||
|
||||
debugStore('设置媒体会话处理器')
|
||||
|
||||
navigator.mediaSession.setActionHandler('play', () => {
|
||||
debugStore('媒体会话: 播放')
|
||||
togglePlay(true)
|
||||
})
|
||||
|
||||
navigator.mediaSession.setActionHandler('pause', () => {
|
||||
debugStore('媒体会话: 暂停')
|
||||
togglePlay(false)
|
||||
})
|
||||
|
||||
// 上一首和下一首需要从外部传入回调
|
||||
mediaSessionInitialized.value = true
|
||||
}
|
||||
|
||||
// 设置上一首/下一首处理器
|
||||
const setTrackNavigationHandlers = (
|
||||
previousHandler: () => void,
|
||||
nextHandler: () => void,
|
||||
) => {
|
||||
if (!('mediaSession' in navigator)) return
|
||||
|
||||
navigator.mediaSession.setActionHandler('previoustrack', () => {
|
||||
debugStore('媒体会话: 上一首')
|
||||
previousHandler()
|
||||
})
|
||||
|
||||
navigator.mediaSession.setActionHandler('nexttrack', () => {
|
||||
debugStore('媒体会话: 下一首')
|
||||
nextHandler()
|
||||
})
|
||||
}
|
||||
|
||||
// 更新媒体会话信息
|
||||
const updateMediaSession = (track: QueueItem) => {
|
||||
if (!('mediaSession' in navigator)) return
|
||||
|
||||
debugStore('更新媒体会话:', track.song.name)
|
||||
|
||||
try {
|
||||
navigator.mediaSession.metadata = new MediaMetadata({
|
||||
title: track.song.name,
|
||||
artist: artistsOrganize(track.song.artists ?? []),
|
||||
album: track.album?.name,
|
||||
artwork: [
|
||||
{
|
||||
src: track.album?.coverUrl ?? '',
|
||||
sizes: '500x500',
|
||||
type: 'image/png',
|
||||
},
|
||||
],
|
||||
})
|
||||
} catch (error) {
|
||||
console.error('更新媒体会话元数据失败:', error)
|
||||
}
|
||||
}
|
||||
|
||||
// 更新媒体会话播放状态
|
||||
const updateMediaSessionPlaybackState = () => {
|
||||
if (!('mediaSession' in navigator)) return
|
||||
|
||||
navigator.mediaSession.playbackState = isPlaying.value
|
||||
? 'playing'
|
||||
: 'paused'
|
||||
debugStore('媒体会话状态更新:', navigator.mediaSession.playbackState)
|
||||
}
|
||||
|
||||
// 更新媒体会话位置信息
|
||||
const updateMediaSessionPosition = () => {
|
||||
if (
|
||||
!('mediaSession' in navigator) ||
|
||||
!('setPositionState' in navigator.mediaSession)
|
||||
)
|
||||
return
|
||||
|
||||
try {
|
||||
navigator.mediaSession.setPositionState({
|
||||
duration: currentTrackDuration.value || 0,
|
||||
playbackRate: 1.0,
|
||||
position: playProgress.value,
|
||||
})
|
||||
} catch (error) {
|
||||
debugStore('媒体会话位置更新失败:', error)
|
||||
}
|
||||
}
|
||||
|
||||
// 监听播放状态变化，自动更新媒体会话
|
||||
watch(isPlaying, () => {
|
||||
updateMediaSessionPlaybackState()
|
||||
})
|
||||
|
||||
// 监听播放进度变化，定期更新位置信息
|
||||
watch(playProgress, () => {
|
||||
updateMediaSessionPosition()
|
||||
})
|
||||
|
||||
return {
|
||||
// 状态读取
|
||||
isPlaying: playingState,
|
||||
playProgress: playProgressState,
|
||||
trackDuration: trackDurationState,
|
||||
playProgressPercent,
|
||||
remainingTime,
|
||||
currentTrack: computed(() => currentTrack.value),
|
||||
|
||||
// 修改方法
|
||||
togglePlay,
|
||||
reportPlayProgress,
|
||||
setCurrentTrackDuration,
|
||||
resetProgress,
|
||||
seekTo,
|
||||
|
||||
// 媒体会话方法
|
||||
setCurrentTrack,
|
||||
setupMediaSessionHandlers,
|
||||
setTrackNavigationHandlers,
|
||||
updateMediaSession,
|
||||
updateMediaSessionPlaybackState,
|
||||
updateMediaSessionPosition,
|
||||
}
|
||||
})
|
||||
|
|
@ -1,415 +1,298 @@
|
|||
interface AudioTrack {
|
||||
url: string
|
||||
buffer: AudioBuffer | null
|
||||
source: AudioBufferSourceNode | null
|
||||
gainNode: GainNode | null
|
||||
class SimpleAudioPlayer {
|
||||
context: AudioContext
|
||||
currentSource: AudioBufferSourceNode | null
|
||||
audioBuffer: AudioBuffer | null
|
||||
playing: boolean
|
||||
startTime: number
|
||||
pauseTime: number
|
||||
duration: number
|
||||
metadata?: any
|
||||
}
|
||||
|
||||
interface PlaybackState {
|
||||
isPlaying: boolean
|
||||
currentIndex: number
|
||||
pausedAt: number
|
||||
pausedOffset: number
|
||||
}
|
||||
|
||||
export class WebAudioGaplessPlayer {
|
||||
private context: AudioContext
|
||||
private masterGain: GainNode
|
||||
private tracks: AudioTrack[] = []
|
||||
private state: PlaybackState = {
|
||||
isPlaying: false,
|
||||
currentIndex: 0,
|
||||
pausedAt: 0,
|
||||
pausedOffset: 0,
|
||||
}
|
||||
private bufferCache: Map<string, AudioBuffer> = new Map()
|
||||
private onTrackEndCallbacks: ((index: number) => void)[] = []
|
||||
private onTrackStartCallbacks: ((index: number) => void)[] = []
|
||||
private preloadAhead = 2
|
||||
private maxCacheSize = 5
|
||||
dummyAudio: HTMLAudioElement
|
||||
|
||||
constructor() {
|
||||
this.context = new (
|
||||
window.AudioContext || (window as any).webkitAudioContext
|
||||
)()
|
||||
this.masterGain = this.context.createGain()
|
||||
this.masterGain.connect(this.context.destination)
|
||||
this.context = new window.AudioContext()
|
||||
this.currentSource = null
|
||||
this.audioBuffer = null
|
||||
this.playing = false
|
||||
this.startTime = 0
|
||||
this.pauseTime = 0
|
||||
this.duration = 0
|
||||
|
||||
// 创建一个隐藏的 HTML Audio 元素来帮助同步媒体会话状态
|
||||
this.dummyAudio = new Audio()
|
||||
this.dummyAudio.style.display = 'none'
|
||||
this.dummyAudio.loop = true
|
||||
this.dummyAudio.volume = 0.001 // 极小音量
|
||||
// 使用一个很短的静音音频文件，或者生成一个
|
||||
this.createSilentAudioBlob()
|
||||
|
||||
document.body.appendChild(this.dummyAudio)
|
||||
|
||||
this.initMediaSession()
|
||||
}
|
||||
|
||||
/**
|
||||
* Load and decode audio from URL
|
||||
*/
|
||||
private async loadAudio(url: string): Promise<AudioBuffer> {
|
||||
if (this.bufferCache.has(url)) {
|
||||
return this.bufferCache.get(url)!
|
||||
createSilentAudioBlob() {
|
||||
// 创建一个1秒的静音WAV文件
|
||||
const sampleRate = 44100
|
||||
const channels = 1
|
||||
const length = sampleRate * 1 // 1秒
|
||||
|
||||
const arrayBuffer = new ArrayBuffer(44 + length * 2)
|
||||
const view = new DataView(arrayBuffer)
|
||||
|
||||
// WAV 文件头
|
||||
const writeString = (offset: number, string: string) => {
|
||||
for (let i = 0; i < string.length; i++) {
|
||||
view.setUint8(offset + i, string.charCodeAt(i))
|
||||
}
|
||||
}
|
||||
|
||||
writeString(0, 'RIFF')
|
||||
view.setUint32(4, 36 + length * 2, true)
|
||||
writeString(8, 'WAVE')
|
||||
writeString(12, 'fmt ')
|
||||
view.setUint32(16, 16, true)
|
||||
view.setUint16(20, 1, true)
|
||||
view.setUint16(22, channels, true)
|
||||
view.setUint32(24, sampleRate, true)
|
||||
view.setUint32(28, sampleRate * 2, true)
|
||||
view.setUint16(32, 2, true)
|
||||
view.setUint16(34, 16, true)
|
||||
writeString(36, 'data')
|
||||
view.setUint32(40, length * 2, true)
|
||||
|
||||
// 静音数据（全零）
|
||||
for (let i = 0; i < length; i++) {
|
||||
view.setInt16(44 + i * 2, 0, true)
|
||||
}
|
||||
|
||||
const blob = new Blob([arrayBuffer], { type: 'audio/wav' })
|
||||
this.dummyAudio.src = URL.createObjectURL(blob)
|
||||
}
|
||||
|
||||
initMediaSession() {
|
||||
if ('mediaSession' in navigator) {
|
||||
navigator.mediaSession.setActionHandler('play', () => {
|
||||
console.log('Media session: play requested')
|
||||
this.play()
|
||||
})
|
||||
navigator.mediaSession.setActionHandler('pause', () => {
|
||||
console.log('Media session: pause requested')
|
||||
this.pause()
|
||||
})
|
||||
navigator.mediaSession.setActionHandler('stop', () => {
|
||||
console.log('Media session: stop requested')
|
||||
this.stop()
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
async loadResource() {
|
||||
try {
|
||||
const response = await fetch(url)
|
||||
if (!response.ok) {
|
||||
throw new Error(`Failed to fetch audio: ${response.status}`)
|
||||
// 如果已经加载过，直接播放
|
||||
if (this.audioBuffer) {
|
||||
this.play()
|
||||
return
|
||||
}
|
||||
|
||||
// 加载音频
|
||||
const response = await fetch(
|
||||
'https://s3-us-west-2.amazonaws.com/s.cdpn.io/858/outfoxing.mp3'
|
||||
)
|
||||
const arrayBuffer = await response.arrayBuffer()
|
||||
const audioBuffer = await this.context.decodeAudioData(arrayBuffer)
|
||||
this.audioBuffer = await this.context.decodeAudioData(arrayBuffer)
|
||||
this.duration = this.audioBuffer.duration
|
||||
|
||||
this.bufferCache.set(url, audioBuffer)
|
||||
this.cleanupCache()
|
||||
// 设置媒体元数据
|
||||
if ('mediaSession' in navigator) {
|
||||
navigator.mediaSession.metadata = new MediaMetadata({
|
||||
title: 'Outfoxing the Fox',
|
||||
artist: 'Kevin MacLeod',
|
||||
album: 'YouTube Audio Library',
|
||||
})
|
||||
}
|
||||
|
||||
return audioBuffer
|
||||
// 开始播放
|
||||
this.play()
|
||||
} catch (error) {
|
||||
console.error('Failed to load audio:', error)
|
||||
throw error
|
||||
console.error('播放失败:', error)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Clean up cache
|
||||
*/
|
||||
private cleanupCache(): void {
|
||||
if (this.bufferCache.size <= this.maxCacheSize) return
|
||||
|
||||
const currentUrls = new Set(
|
||||
this.tracks
|
||||
.slice(
|
||||
Math.max(0, this.state.currentIndex - 1),
|
||||
this.state.currentIndex + this.preloadAhead + 1,
|
||||
)
|
||||
.map((t) => t.url),
|
||||
)
|
||||
|
||||
for (const [url] of this.bufferCache) {
|
||||
if (!currentUrls.has(url) && this.bufferCache.size > this.maxCacheSize) {
|
||||
this.bufferCache.delete(url)
|
||||
}
|
||||
}
|
||||
async play() {
|
||||
if (!this.audioBuffer) {
|
||||
this.loadResource()
|
||||
return
|
||||
}
|
||||
|
||||
/**
|
||||
* Add a track to the queue
|
||||
*/
|
||||
async addTrack(url: string, metadata?: any): Promise<number> {
|
||||
const track: AudioTrack = {
|
||||
url,
|
||||
buffer: null,
|
||||
source: null,
|
||||
gainNode: null,
|
||||
duration: 0,
|
||||
metadata,
|
||||
if (this.playing) {
|
||||
console.log('Already playing, ignoring play request')
|
||||
return
|
||||
}
|
||||
|
||||
this.tracks.push(track)
|
||||
const index = this.tracks.length - 1
|
||||
console.log('Starting playback from position:', this.pauseTime)
|
||||
|
||||
// Preload if within range
|
||||
if (this.shouldPreload(index)) {
|
||||
await this.preloadTrack(index)
|
||||
}
|
||||
|
||||
return index
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a track should be preloaded
|
||||
*/
|
||||
private shouldPreload(index: number): boolean {
|
||||
const distance = index - this.state.currentIndex
|
||||
return distance >= 0 && distance <= this.preloadAhead
|
||||
}
|
||||
|
||||
/**
|
||||
* Preload a track
|
||||
*/
|
||||
private async preloadTrack(index: number): Promise<void> {
|
||||
const track = this.tracks[index]
|
||||
if (!track || track.buffer) return
|
||||
|
||||
try {
|
||||
track.buffer = await this.loadAudio(track.url)
|
||||
track.duration = track.buffer.duration
|
||||
} catch (error) {
|
||||
console.error(`Failed to preload track ${index}:`, error)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Stop current track if playing
|
||||
*/
|
||||
private stopCurrentTrack(): void {
|
||||
const currentTrack = this.tracks[this.state.currentIndex]
|
||||
if (currentTrack?.source) {
|
||||
try {
|
||||
currentTrack.source.stop()
|
||||
} catch (e) {
|
||||
// Source might have already ended
|
||||
}
|
||||
currentTrack.source = null
|
||||
currentTrack.gainNode = null
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Play a specific track
|
||||
*/
|
||||
async playTrack(index: number): Promise<void> {
|
||||
if (index < 0 || index >= this.tracks.length) return
|
||||
|
||||
// Stop any currently playing track
|
||||
this.stopCurrentTrack()
|
||||
|
||||
// Resume context if suspended
|
||||
// 恢复 AudioContext（如果被暂停）
|
||||
if (this.context.state === 'suspended') {
|
||||
await this.context.resume()
|
||||
}
|
||||
|
||||
// Ensure track is loaded
|
||||
await this.preloadTrack(index)
|
||||
// 开始播放隐藏的 audio 元素
|
||||
try {
|
||||
await this.dummyAudio.play()
|
||||
} catch (e) {
|
||||
console.log('Dummy audio play failed (expected):', e)
|
||||
}
|
||||
|
||||
const track = this.tracks[index]
|
||||
if (!track?.buffer) {
|
||||
console.error(`Track ${index} not loaded`)
|
||||
// 创建新的源节点
|
||||
this.currentSource = this.context.createBufferSource()
|
||||
this.currentSource.buffer = this.audioBuffer
|
||||
this.currentSource.connect(this.context.destination)
|
||||
|
||||
// 从暂停位置开始播放
|
||||
const offset = this.pauseTime
|
||||
this.currentSource.start(0, offset)
|
||||
|
||||
this.startTime = this.context.currentTime - offset
|
||||
this.playing = true
|
||||
|
||||
// 播放结束处理 - 只在自然结束时触发
|
||||
this.currentSource.onended = () => {
|
||||
console.log('Audio naturally ended')
|
||||
// 检查是否真的播放到了结尾
|
||||
const currentTime = this.getCurrentTime()
|
||||
if (currentTime >= this.duration - 0.1) { // 允许小误差
|
||||
console.log('Natural end of track')
|
||||
this.stop()
|
||||
} else {
|
||||
console.log('Audio ended prematurely (likely paused), current time:', currentTime)
|
||||
// 这是由于暂停导致的结束，不做任何处理
|
||||
}
|
||||
}
|
||||
|
||||
// 更新媒体会话状态
|
||||
this.updateMediaSessionState()
|
||||
}
|
||||
|
||||
pause() {
|
||||
console.log('Pause requested, current state - playing:', this.playing, 'hasSource:', !!this.currentSource)
|
||||
|
||||
// 暂停隐藏的 audio 元素
|
||||
this.dummyAudio.pause()
|
||||
|
||||
if (!this.playing) {
|
||||
console.log('Already paused, but updating media session state')
|
||||
// 即使已经暂停，也要确保媒体会话状态正确
|
||||
this.updateMediaSessionState()
|
||||
return
|
||||
}
|
||||
|
||||
// Update state
|
||||
this.state.currentIndex = index
|
||||
this.state.isPlaying = true
|
||||
this.state.pausedOffset = 0
|
||||
|
||||
// Create audio nodes
|
||||
const source = this.context.createBufferSource()
|
||||
source.buffer = track.buffer
|
||||
|
||||
const gainNode = this.context.createGain()
|
||||
source.connect(gainNode)
|
||||
gainNode.connect(this.masterGain)
|
||||
|
||||
// Set up callbacks
|
||||
source.onended = () => {
|
||||
this.handleTrackEnded(index)
|
||||
if (!this.currentSource) {
|
||||
console.log('No current source, but updating media session state')
|
||||
this.updateMediaSessionState()
|
||||
return
|
||||
}
|
||||
|
||||
// Store references
|
||||
track.source = source
|
||||
track.gainNode = gainNode
|
||||
console.log('Pausing playback at position:', this.getCurrentTime())
|
||||
|
||||
// Start playing immediately
|
||||
source.start(this.context.currentTime)
|
||||
// 计算当前播放位置
|
||||
this.pauseTime = this.getCurrentTime()
|
||||
|
||||
// Notify track started
|
||||
this.onTrackStartCallbacks.forEach((cb) => cb(index))
|
||||
// 移除 onended 事件处理器，避免干扰
|
||||
this.currentSource.onended = null
|
||||
|
||||
// Preload next tracks
|
||||
for (let i = 1; i <= this.preloadAhead; i++) {
|
||||
const nextIndex = index + i
|
||||
if (nextIndex < this.tracks.length) {
|
||||
this.preloadTrack(nextIndex).catch(console.error)
|
||||
}
|
||||
}
|
||||
// 停止当前源
|
||||
this.currentSource.stop()
|
||||
this.currentSource = null
|
||||
this.playing = false
|
||||
|
||||
// 更新媒体会话状态
|
||||
this.updateMediaSessionState()
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle track ended event
|
||||
*/
|
||||
private handleTrackEnded(index: number): void {
|
||||
const track = this.tracks[index]
|
||||
if (track) {
|
||||
track.source = null
|
||||
track.gainNode = null
|
||||
stop() {
|
||||
console.log('Stopping playback')
|
||||
|
||||
// 停止隐藏的 audio 元素
|
||||
this.dummyAudio.pause()
|
||||
this.dummyAudio.currentTime = 0
|
||||
|
||||
if (this.currentSource) {
|
||||
this.currentSource.stop()
|
||||
this.currentSource = null
|
||||
}
|
||||
|
||||
// Only notify if this is still the current track
|
||||
if (index === this.state.currentIndex) {
|
||||
this.onTrackEndCallbacks.forEach((cb) => cb(index))
|
||||
}
|
||||
this.playing = false
|
||||
this.pauseTime = 0
|
||||
this.startTime = 0
|
||||
|
||||
// 更新媒体会话状态
|
||||
this.updateMediaSessionState()
|
||||
}
|
||||
|
||||
/**
|
||||
* Start playing from a specific index
|
||||
*/
|
||||
async play(startIndex = 0): Promise<void> {
|
||||
await this.playTrack(startIndex)
|
||||
}
|
||||
|
||||
/**
|
||||
* Play next track
|
||||
*/
|
||||
async playNext(): Promise<void> {
|
||||
const nextIndex = this.state.currentIndex + 1
|
||||
if (nextIndex < this.tracks.length) {
|
||||
await this.playTrack(nextIndex)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Pause playback
|
||||
*/
|
||||
pause(): void {
|
||||
if (!this.state.isPlaying) return
|
||||
|
||||
this.state.pausedAt = this.context.currentTime
|
||||
this.state.isPlaying = false
|
||||
|
||||
// Calculate paused offset
|
||||
const position = this.getCurrentPosition()
|
||||
if (position) {
|
||||
this.state.pausedOffset = position.trackTime
|
||||
}
|
||||
|
||||
// Stop current track
|
||||
this.stopCurrentTrack()
|
||||
|
||||
// Suspend context to save resources
|
||||
this.context.suspend()
|
||||
}
|
||||
|
||||
/**
|
||||
* Resume playback
|
||||
*/
|
||||
async resume(): Promise<void> {
|
||||
if (this.state.isPlaying) return
|
||||
|
||||
await this.context.resume()
|
||||
|
||||
const currentTrack = this.tracks[this.state.currentIndex]
|
||||
if (!currentTrack?.buffer) return
|
||||
|
||||
this.state.isPlaying = true
|
||||
|
||||
// Create new source for resume
|
||||
const source = this.context.createBufferSource()
|
||||
source.buffer = currentTrack.buffer
|
||||
|
||||
const gainNode = this.context.createGain()
|
||||
source.connect(gainNode)
|
||||
gainNode.connect(this.masterGain)
|
||||
|
||||
// Calculate remaining duration
|
||||
const remainingDuration = currentTrack.duration - this.state.pausedOffset
|
||||
|
||||
// Resume from offset
|
||||
source.start(this.context.currentTime, this.state.pausedOffset, remainingDuration)
|
||||
|
||||
source.onended = () => this.handleTrackEnded(this.state.currentIndex)
|
||||
|
||||
// Store references
|
||||
currentTrack.source = source
|
||||
currentTrack.gainNode = gainNode
|
||||
|
||||
this.state.pausedOffset = 0
|
||||
}
|
||||
|
||||
/**
|
||||
* Stop playback
|
||||
*/
|
||||
stop(): void {
|
||||
togglePlay() {
|
||||
if (this.playing) {
|
||||
this.pause()
|
||||
this.state.currentIndex = 0
|
||||
this.state.pausedOffset = 0
|
||||
}
|
||||
|
||||
/**
|
||||
* Seek to a specific track
|
||||
*/
|
||||
async seekToTrack(index: number): Promise<void> {
|
||||
if (index < 0 || index >= this.tracks.length) return
|
||||
await this.playTrack(index)
|
||||
}
|
||||
|
||||
/**
|
||||
* Get current playback position
|
||||
*/
|
||||
getCurrentPosition(): {
|
||||
trackIndex: number
|
||||
trackTime: number
|
||||
totalTime: number
|
||||
} | null {
|
||||
if (!this.state.isPlaying) {
|
||||
return {
|
||||
trackIndex: this.state.currentIndex,
|
||||
trackTime: this.state.pausedOffset,
|
||||
totalTime: 0,
|
||||
} else {
|
||||
this.play()
|
||||
}
|
||||
}
|
||||
|
||||
const currentTrack = this.tracks[this.state.currentIndex]
|
||||
if (!currentTrack?.source) return null
|
||||
getCurrentTime(): number {
|
||||
if (this.playing && this.currentSource) {
|
||||
return Math.min(this.context.currentTime - this.startTime, this.duration)
|
||||
}
|
||||
return this.pauseTime
|
||||
}
|
||||
|
||||
// Estimate current time (not perfectly accurate but good enough)
|
||||
const elapsed = this.context.currentTime - (this.state.pausedAt || 0)
|
||||
const trackTime = Math.min(elapsed + this.state.pausedOffset, currentTrack.duration)
|
||||
updateMediaSessionState() {
|
||||
if ('mediaSession' in navigator) {
|
||||
let state = 'none'
|
||||
if (this.playing) {
|
||||
state = 'playing'
|
||||
} else if (this.audioBuffer) {
|
||||
// 只要有音频缓冲区就应该是暂停状态
|
||||
state = 'paused'
|
||||
}
|
||||
|
||||
return {
|
||||
trackIndex: this.state.currentIndex,
|
||||
trackTime,
|
||||
totalTime: trackTime,
|
||||
console.log('Updating media session state to:', state, '(playing:', this.playing, ', hasBuffer:', !!this.audioBuffer, ')')
|
||||
|
||||
// 强制设置状态
|
||||
try {
|
||||
navigator.mediaSession.playbackState = state as any
|
||||
|
||||
// 更新位置信息
|
||||
if ('setPositionState' in navigator.mediaSession && this.duration > 0) {
|
||||
navigator.mediaSession.setPositionState({
|
||||
duration: this.duration,
|
||||
playbackRate: 1.0,
|
||||
position: this.getCurrentTime()
|
||||
})
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('Error updating media session:', error)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Set volume (0.0 to 1.0)
|
||||
*/
|
||||
setVolume(volume: number): void {
|
||||
this.masterGain.gain.value = Math.max(0, Math.min(1, volume))
|
||||
// 定期更新播放位置
|
||||
startPositionUpdates() {
|
||||
setInterval(() => {
|
||||
if (this.audioBuffer) {
|
||||
this.updateMediaSessionState()
|
||||
}
|
||||
}, 1000)
|
||||
}
|
||||
|
||||
/**
|
||||
* Get volume
|
||||
*/
|
||||
getVolume(): number {
|
||||
return this.masterGain.gain.value
|
||||
}
|
||||
|
||||
/**
|
||||
* Clear all tracks
|
||||
*/
|
||||
clearQueue(): void {
|
||||
// 清理资源
|
||||
destroy() {
|
||||
this.stop()
|
||||
this.tracks = []
|
||||
this.bufferCache.clear()
|
||||
if (this.dummyAudio) {
|
||||
document.body.removeChild(this.dummyAudio)
|
||||
}
|
||||
|
||||
/**
|
||||
* Register callback for track end event
|
||||
*/
|
||||
onTrackEnd(callback: (index: number) => void): void {
|
||||
this.onTrackEndCallbacks.push(callback)
|
||||
}
|
||||
|
||||
/**
|
||||
* Register callback for track start event
|
||||
*/
|
||||
onTrackStart(callback: (index: number) => void): void {
|
||||
this.onTrackStartCallbacks.push(callback)
|
||||
}
|
||||
|
||||
/**
|
||||
* Get audio context
|
||||
*/
|
||||
getContext(): AudioContext {
|
||||
return this.context
|
||||
}
|
||||
|
||||
/**
|
||||
* Get master gain node
|
||||
*/
|
||||
getMasterGain(): GainNode {
|
||||
return this.masterGain
|
||||
}
|
||||
|
||||
/**
|
||||
* Destroy the player
|
||||
*/
|
||||
destroy(): void {
|
||||
this.stop()
|
||||
this.clearQueue()
|
||||
this.onTrackEndCallbacks = []
|
||||
this.onTrackStartCallbacks = []
|
||||
|
||||
if (this.context.state !== 'closed') {
|
||||
this.context.close()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
export default SimpleWebAudioPlayer
|
||||
Loading…
Reference in New Issue
Block a user