添加歌曲预加载功能

publish/changeLog.md

@@ -4,6 +4,7 @@
 
 ### 优化
 
+- 优化正常播放结束时的下一首歌曲播放衔接度，在歌曲即将播放结束时将预获取下一首歌曲的播放链接，减少自动切歌时的等待时间
 - 首次使用的提示窗口可以点击背景或者返回键关闭（#577）
 - 上移 Toast 位置避免遮挡播放模式图标（#603 @sibojia）
 

src/core/init/player/index.ts

@@ -4,6 +4,7 @@ import initPlayStatus from './playStatus'
 import initPlayerEvent from './playerEvent'
 import initWatchList from './watchList'
 import initPlayProgress from './playProgress'
+import initPreloadNextMusic from './preloadNextMusic'
 import initLyric from './lyric'
 
 export default async(setting: LX.AppSetting) => {
@@ -14,4 +15,5 @@ export default async(setting: LX.AppSetting) => {
   initPlayerEvent()
   initWatchList()
   initPlayProgress()
+  initPreloadNextMusic()
 }

src/core/init/player/preloadNextMusic.ts

@@ -0,0 +1,66 @@
+import { getMusicUrl } from '@/core/music'
+import { getNextPlayMusicInfo, resetRandomNextMusicInfo } from '@/core/player/player'
+import { checkUrl } from '@/utils/request'
+import playerState from '@/store/player/state'
+
+
+const preloadMusicInfo = {
+  isLoading: false,
+  preProgress: 0,
+  info: null as LX.Player.PlayMusicInfo | null,
+}
+const resetPreloadInfo = () => {
+  preloadMusicInfo.preProgress = 0
+  preloadMusicInfo.info = null
+  preloadMusicInfo.isLoading = false
+}
+const preloadNextMusicUrl = async(curTime: number) => {
+  if (preloadMusicInfo.isLoading || curTime - preloadMusicInfo.preProgress < 3) return
+  preloadMusicInfo.isLoading = true
+  console.log('preload next music url')
+  const info = await getNextPlayMusicInfo()
+  if (info) {
+    preloadMusicInfo.info = info
+    const url = await getMusicUrl({ musicInfo: info.musicInfo }).catch(() => '')
+    if (url) {
+      console.log('preload url', url)
+      const result = await checkUrl(url).then(() => true).catch(() => false)
+      if (!result) {
+        const url = await getMusicUrl({ musicInfo: info.musicInfo, isRefresh: true }).catch(() => '')
+        console.log('preload url refresh', url)
+      }
+    }
+  }
+  preloadMusicInfo.isLoading = false
+}
+
+export default () => {
+  const setProgress = (time: number) => {
+    if (!playerState.musicInfo.id) return
+    preloadMusicInfo.preProgress = time
+  }
+
+  const handleSetPlayInfo = () => {
+    resetPreloadInfo()
+  }
+
+  const handleConfigUpdated: typeof global.state_event.configUpdated = (keys, settings) => {
+    if (!keys.includes('player.togglePlayMethod')) return
+    if (!preloadMusicInfo.info || preloadMusicInfo.info.isTempPlay) return
+    resetRandomNextMusicInfo()
+    preloadMusicInfo.info = null
+    preloadMusicInfo.preProgress = playerState.progress.nowPlayTime
+  }
+
+  const handlePlayProgressChanged: typeof global.state_event.playProgressChanged = (progress) => {
+    const duration = progress.maxPlayTime
+    if (duration > 10 && duration - progress.nowPlayTime < 10 && !preloadMusicInfo.info) {
+      void preloadNextMusicUrl(progress.nowPlayTime)
+    }
+  }
+
+  global.app_event.on('setProgress', setProgress)
+  global.app_event.on('musicToggled', handleSetPlayInfo)
+  global.state_event.on('configUpdated', handleConfigUpdated)
+  global.state_event.on('playProgressChanged', handlePlayProgressChanged)
+}

src/core/init/userApi/request.js

@@ -71,7 +71,7 @@ const blobToBuffer = (blob) => {
   })
 }
 
-export const fetchData = (url, { timeout = 15000, ...options }) => {
+export const fetchData = (url, { timeout = 13_000, ...options }) => {
   // console.log('---start---', url)
 
   const controller = new global.AbortController()

src/core/music/utils.ts

@@ -15,12 +15,14 @@ import { apis } from '@/utils/musicSdk/api-source'
 
 const getOtherSourcePromises = new Map()
 export const existTimeExp = /\[\d{1,2}:.*\d{1,4}\]/
+const otherSourceCache = new Map<LX.Music.MusicInfo | LX.Download.ListItem, LX.Music.MusicInfoOnline[]>()
 
 export const getOtherSource = async(musicInfo: LX.Music.MusicInfo | LX.Download.ListItem, isRefresh = false): Promise<LX.Music.MusicInfoOnline[]> => {
   // if (!isRefresh) {
   //   const cachedInfo = await getOtherSourceFromStore(musicInfo.id)
   //   if (cachedInfo.length) return cachedInfo
   // }
+  if (otherSourceCache.has(musicInfo)) return otherSourceCache.get(musicInfo)!
   let key: string
   let searchMusicInfo: {
     name: string
@@ -54,9 +56,12 @@ export const getOtherSource = async(musicInfo: LX.Music.MusicInfo | LX.Download.
     let timeout: null | number = BackgroundTimer.setTimeout(() => {
       timeout = null
       reject(new Error('find music timeout'))
-    }, 15_000)
+    }, 12_000)
     findMusic(searchMusicInfo).then((otherSource) => {
-      resolve(otherSource.map(toNewMusicInfo) as LX.Music.MusicInfoOnline[])
+      if (otherSourceCache.size > 100) otherSourceCache.clear()
+      const source = otherSource.map(toNewMusicInfo) as LX.Music.MusicInfoOnline[]
+      otherSourceCache.set(musicInfo, source)
+      resolve(source)
     }).catch(reject).finally(() => {
       if (timeout) BackgroundTimer.clearTimeout(timeout)
     })

src/core/player/player.ts

@@ -238,6 +238,7 @@ const handlePlay = async() => {
   }
 
   global.lx.isPlayedStop &&= false
+  resetRandomNextMusicInfo()
 
   if (global.lx.restorePlayInfo) {
     void handleRestorePlay(global.lx.restorePlayInfo)
@@ -284,6 +285,108 @@ const handleToggleStop = async() => {
   })
 }
 
+
+const randomNextMusicInfo = {
+  info: null as LX.Player.PlayMusicInfo | null,
+  index: -1,
+}
+export const resetRandomNextMusicInfo = () => {
+  if (randomNextMusicInfo.info) {
+    randomNextMusicInfo.info = null
+    randomNextMusicInfo.index = -1
+  }
+}
+
+export const getNextPlayMusicInfo = async(): Promise<LX.Player.PlayMusicInfo | null> => {
+  if (playerState.tempPlayList.length) { // 如果稍后播放列表存在歌曲则直接播放改列表的歌曲
+    const playMusicInfo = playerState.tempPlayList[0]
+    return playMusicInfo
+  }
+
+  if (playerState.playMusicInfo.musicInfo == null) return null
+
+  if (randomNextMusicInfo.info) return randomNextMusicInfo.info
+
+  const playMusicInfo = playerState.playMusicInfo
+  const playInfo = playerState.playInfo
+  // console.log(playInfo.playerListId)
+  const currentListId = playInfo.playerListId
+  if (!currentListId) return null
+  const currentList = getList(currentListId)
+
+  const playedList = playerState.playedList
+  if (playedList.length) { // 移除已播放列表内不存在原列表的歌曲
+    let currentId: string
+    if (playMusicInfo.isTempPlay) {
+      const musicInfo = currentList[playInfo.playerPlayIndex]
+      if (musicInfo) currentId = musicInfo.id
+    } else {
+      currentId = playMusicInfo.musicInfo!.id
+    }
+    // 从已播放列表移除播放列表已删除的歌曲
+    let index
+    for (index = playedList.findIndex(m => m.musicInfo.id === currentId) + 1; index < playedList.length; index++) {
+      const playMusicInfo = playedList[index]
+      const currentId = playMusicInfo.musicInfo.id
+      if (playMusicInfo.listId == currentListId && !currentList.some(m => m.id === currentId)) {
+        removePlayedList(index)
+        continue
+      }
+      break
+    }
+
+    if (index < playedList.length) return playedList[index]
+  }
+  // const isCheckFile = findNum > 2 // 针对下载列表，如果超过两次都碰到无效歌曲，则过滤整个列表内的无效歌曲
+  let { filteredList, playerIndex } = await filterList({ // 过滤已播放歌曲
+    listId: currentListId,
+    list: currentList,
+    playedList,
+    playerMusicInfo: currentList[playInfo.playerPlayIndex],
+    isNext: true,
+  })
+
+  if (!filteredList.length) return null
+  // let currentIndex: number = filteredList.indexOf(currentList[playInfo.playerPlayIndex])
+  if (playerIndex == -1 && filteredList.length) playerIndex = 0
+  let nextIndex = playerIndex
+
+  let togglePlayMethod = settingState.setting['player.togglePlayMethod']
+  switch (togglePlayMethod) {
+    case 'listLoop':
+      nextIndex = playerIndex === filteredList.length - 1 ? 0 : playerIndex + 1
+      break
+    case 'random':
+      nextIndex = getRandom(0, filteredList.length)
+      break
+    case 'list':
+      nextIndex = playerIndex === filteredList.length - 1 ? -1 : playerIndex + 1
+      break
+    case 'singleLoop':
+      break
+    default:
+      return null
+  }
+  if (nextIndex < 0) return null
+
+  const nextPlayMusicInfo = {
+    musicInfo: filteredList[nextIndex],
+    listId: currentListId,
+    isTempPlay: false,
+  }
+
+  if (togglePlayMethod == 'random') {
+    randomNextMusicInfo.info = nextPlayMusicInfo
+    randomNextMusicInfo.index = nextIndex
+  }
+  return nextPlayMusicInfo
+}
+
+const handlePlayNext = async(playMusicInfo: LX.Player.PlayMusicInfo) => {
+  await pause()
+  setPlayMusicInfo(playMusicInfo.listId, playMusicInfo.musicInfo, playMusicInfo.isTempPlay)
+  await handlePlay()
+}
 /**
  * 下一曲
  * @param isAutoToggle 是否自动切换
@@ -293,9 +396,7 @@ export const playNext = async(isAutoToggle = false): Promise<void> => {
   if (playerState.tempPlayList.length) { // 如果稍后播放列表存在歌曲则直接播放改列表的歌曲
     const playMusicInfo = playerState.tempPlayList[0]
     removeTempPlayList(0)
-    await pause()
-    setPlayMusicInfo(playMusicInfo.listId, playMusicInfo.musicInfo, playMusicInfo.isTempPlay)
-    await handlePlay()
+    await handlePlayNext(playMusicInfo)
     return
   }
 
@@ -331,13 +432,14 @@ export const playNext = async(isAutoToggle = false): Promise<void> => {
     }
 
     if (index < playedList.length) {
-      const playMusicInfo = playedList[index]
-      await pause()
-      setPlayMusicInfo(playMusicInfo.listId, playMusicInfo.musicInfo, playMusicInfo.isTempPlay)
-      await handlePlay()
+      await handlePlayNext(playedList[index])
       return
     }
   }
+  if (randomNextMusicInfo.info) {
+    await handlePlayNext(randomNextMusicInfo.info)
+    return
+  }
   // const isCheckFile = findNum > 2 // 针对下载列表，如果超过两次都碰到无效歌曲，则过滤整个列表内的无效歌曲
   let { filteredList, playerIndex } = await filterList({ // 过滤已播放歌曲
     listId: currentListId,
@@ -379,15 +481,11 @@ export const playNext = async(isAutoToggle = false): Promise<void> => {
   }
   if (nextIndex < 0) return
 
-  const nextPlayMusicInfo = {
+  await handlePlayNext({
     musicInfo: filteredList[nextIndex],
     listId: currentListId,
     isTempPlay: false,
-  }
-
-  await pause()
-  setPlayMusicInfo(nextPlayMusicInfo.listId, nextPlayMusicInfo.musicInfo)
-  await handlePlay()
+  })
 }
 
 /**
@@ -424,10 +522,7 @@ export const playPrev = async(isAutoToggle = false): Promise<void> => {
     }
 
     if (index > -1) {
-      const playMusicInfo = playedList[index]
-      await pause()
-      setPlayMusicInfo(playMusicInfo.listId, playMusicInfo.musicInfo, playMusicInfo.isTempPlay)
-      await handlePlay()
+      await handlePlayNext(playedList[index])
       return
     }
   }
@@ -472,15 +567,12 @@ export const playPrev = async(isAutoToggle = false): Promise<void> => {
     if (nextIndex < 0) return
   }
 
-  const nextPlayMusicInfo = {
+
+  await handlePlayNext({
     musicInfo: filteredList[nextIndex],
     listId: currentListId,
     isTempPlay: false,
-  }
-
-  await pause()
-  setPlayMusicInfo(nextPlayMusicInfo.listId, nextPlayMusicInfo.musicInfo)
-  await handlePlay()
+  })
 }
 
 /**

src/utils/request.js

@@ -215,3 +215,13 @@ const fetchData = (url, { timeout = 15000, ...options }) => {
     },
   }
 }
+
+export const checkUrl = async(url, options = {}) => {
+  return fetchData(url, { method: 'head', ...options }).request.then(resp => {
+    if (resp.statusCode === 200) {
+      return Promise.resolve()
+    } else {
+      throw new Error(resp.statusCode)
+    }
+  })
+}