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@ -14,17 +14,37 @@ public class MusicService: NSObject { |
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public static let shared: MusicService = MusicService() |
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private var player: AVPlayer? |
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private var playlist: [[String: String]] = [] |
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private var playlist: [[String: Any]] = [] |
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private var currentIndex = 0 |
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public var isPlaying = false |
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private var flutterChannel: FlutterMethodChannel? |
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private var progressTimer: Timer? |
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// 音量控制相关 |
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private var currentVolume: Float = 1.0 |
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private var originalVolume: Float = 1.0 |
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private var isVolumeReduced: Bool = false |
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// 当前播放的歌曲ID |
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private var currentIdInternal: Int64? = nil |
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private override init() { |
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super.init() |
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setupRemoteCommandCenter() |
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setupAudioSession() |
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} |
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// MARK: - 音频会话设置 |
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private func setupAudioSession() { |
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do { |
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try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [.allowAirPlay, .allowBluetooth]) |
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try AVAudioSession.sharedInstance().setActive(true) |
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} catch { |
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print("设置音频会话失败: \(error)") |
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} |
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} |
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// MARK: - 基础播放控制 |
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func getCurrentUrlString() -> String? { |
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guard let urlAsset = player?.currentItem?.asset as? AVURLAsset else { |
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return nil |
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@ -32,53 +52,149 @@ public class MusicService: NSObject { |
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return urlAsset.url.absoluteString |
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} |
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public func play(song: [String: String]) { |
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guard let urlString = song["url"], let url = URL(string: urlString) else { return } |
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player = AVPlayer(url: url) |
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player?.play() |
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isPlaying = true |
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updateNowPlayingInfo(song: song) |
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func getCurrentId() -> Int64? { |
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return currentIdInternal |
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} |
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public func playPlaylist(songs: [[String: String]]) { |
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public func play(song: [String: Any]) { |
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guard let urlString = song["url"] as? String, let url = URL(string: urlString) else { return } |
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// 获取歌曲ID |
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if let id = song["id"] as? NSNumber { |
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currentIdInternal = id.int64Value |
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} else { |
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currentIdInternal = 0 |
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} |
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print("开始播放: \(urlString), ID: \(currentIdInternal ?? 0)") |
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// 检查是否已在播放列表中 |
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let existingIndex = playlist.firstIndex { existingSong in |
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if let existingId = existingSong["id"] as? NSNumber, |
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let currentId = song["id"] as? NSNumber { |
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return existingId.int64Value == currentId.int64Value |
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} |
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return false |
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} |
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if existingIndex == nil { |
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playlist.append(song) |
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currentIndex = playlist.count - 1 |
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} else { |
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currentIndex = existingIndex! |
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} |
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// 创建播放项 |
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let playerItem = AVPlayerItem(url: url) |
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player = AVPlayer(playerItem: playerItem) |
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// 设置播放器观察者 |
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setupPlayerObservers() |
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// 监听播放项状态变化 |
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setupPlayerItemObservers(playerItem: playerItem, song: song) |
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currentVolume = 1.0 |
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player?.volume = currentVolume |
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print("播放器已创建，等待加载完成...") |
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} |
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public func playPlaylist(songs: [[String: Any]]) { |
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playlist = songs |
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currentIndex = 0 |
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if !playlist.isEmpty { |
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play(song: playlist[currentIndex]) |
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} |
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} |
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func pause() { |
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player?.pause() |
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isPlaying = false |
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updatePlaybackState() |
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updateMediaSessionPlaybackState(isPlaying: false) |
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stopProgressTimer() |
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print("已暂停") |
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} |
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func resume() { |
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player?.play() |
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isPlaying = true |
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updatePlaybackState() |
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updateMediaSessionPlaybackState(isPlaying: true) |
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startProgressTimer() |
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print("继续播放") |
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} |
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func next() { |
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guard currentIndex + 1 < playlist.count else { return } |
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currentIndex += 1 |
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play(song: playlist[currentIndex]) |
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playNext() |
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} |
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func previous() { |
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guard currentIndex - 1 >= 0 else { return } |
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currentIndex -= 1 |
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playPrevious() |
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} |
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private func playNext() { |
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guard !playlist.isEmpty else { return } |
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currentIndex = (currentIndex + 1) % playlist.count |
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play(song: playlist[currentIndex]) |
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} |
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private func playPrevious() { |
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guard !playlist.isEmpty else { return } |
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currentIndex = currentIndex - 1 < 0 ? playlist.count - 1 : currentIndex - 1 |
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play(song: playlist[currentIndex]) |
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} |
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private func playNextOrStop() { |
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if currentIndex + 1 < playlist.count { |
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currentIndex += 1 |
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play(song: playlist[currentIndex]) |
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} else { |
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stop() |
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} |
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} |
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func stop() { |
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player?.pause() |
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player?.replaceCurrentItem(with: nil) |
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isPlaying = false |
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currentIdInternal = nil |
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updatePlaybackState() |
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updateMediaSessionPlaybackState(isPlaying: false) |
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stopProgressTimer() |
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print("已停止") |
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} |
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// MARK: - 音量控制 |
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func setVolume(volume: Float) { |
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player?.volume = volume |
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let clampedVolume = max(0.0, min(1.0, volume)) |
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currentVolume = clampedVolume |
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player?.volume = clampedVolume |
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print("设置音量: \(clampedVolume)") |
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} |
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/// 降低音量（AI说话时） |
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func reduceVolume() { |
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if !isVolumeReduced { |
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originalVolume = currentVolume |
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let reducedVolume = max(0.0, min(1.0, currentVolume * 0.3)) // 降低到30% |
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setVolume(volume: reducedVolume) |
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isVolumeReduced = true |
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print("AI说话开始，音量从 \(originalVolume) 降低到 \(reducedVolume)") |
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} |
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} |
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/// 恢复原始音量（AI说话结束时） |
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func restoreVolume() { |
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if isVolumeReduced { |
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setVolume(volume: originalVolume) |
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isVolumeReduced = false |
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print("AI说话结束，音量恢复到 \(originalVolume)") |
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} |
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} |
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// MARK: - 进度控制 |
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func getProgress() -> [String: Any] { |
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guard let player = player, let currentItem = player.currentItem else { |
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return [ |
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@ -91,23 +207,55 @@ public class MusicService: NSObject { |
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let currentTime = CMTimeGetSeconds(player.currentTime()) |
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let duration = CMTimeGetSeconds(currentItem.duration) |
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// 处理无效值 |
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let currentPosition = currentTime.isNaN || currentTime.isInfinite ? 0 : Int(currentTime * 1000) |
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let totalDuration = duration.isNaN || duration.isInfinite ? 0 : Int(duration * 1000) |
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let progress = totalDuration > 0 ? currentTime / duration : 0.0 |
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// 更严格的有效性检查 |
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let currentPosition = (currentTime.isNaN || currentTime.isInfinite || currentTime < 0) ? 0 : Int(currentTime * 1000) |
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let totalDuration = (duration.isNaN || duration.isInfinite || duration <= 0) ? 0 : Int(duration * 1000) |
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let progress = (totalDuration > 0 && currentTime >= 0) ? currentTime / duration : 0.0 |
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return [ |
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let result = [ |
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"currentPosition": currentPosition, |
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"duration": totalDuration, |
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"progress": progress.isNaN || progress.isInfinite ? 0.0 : progress |
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] |
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// 添加调试日志 |
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if totalDuration == 0 { |
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print("警告: 音频时长为0，可能还在加载中。原始duration: \(duration)") |
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} |
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return result |
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} |
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func seekTo(positionMs: Int) { |
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guard let player = player else { return } |
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// 记录当前播放状态 |
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let wasPlaying = isPlaying |
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let time = CMTime(seconds: Double(positionMs) / 1000.0, preferredTimescale: CMTimeScale(NSEC_PER_SEC)) |
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player.seek(to: time) |
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player.seek(to: time) { [weak self] completed in |
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if completed { |
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print("跳转到位置: \(positionMs)ms") |
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// 如果之前是播放状态，确保继续播放 |
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if wasPlaying { |
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self?.player?.play() |
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self?.isPlaying = true |
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self?.updateMediaSessionPlaybackState(isPlaying: true) |
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self?.startProgressTimer() |
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} |
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// 立即更新进度信息到系统媒体控制中心 |
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self?.updateProgressInfoImmediately() |
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// 通知Flutter层 |
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self?.flutterChannel?.invokeMethod("onMediaSessionSeekTo", arguments: ["position": positionMs]) |
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} |
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} |
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} |
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// MARK: - 媒体会话控制 |
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private func setupRemoteCommandCenter() { |
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let commandCenter = MPRemoteCommandCenter.shared() |
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@ -130,22 +278,42 @@ public class MusicService: NSObject { |
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self.previous() |
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return .success |
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} |
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commandCenter.stopCommand.addTarget { [unowned self] _ in |
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self.stop() |
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return .success |
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} |
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} |
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private func updateNowPlayingInfo(song: [String: String]) { |
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private func updateNowPlayingInfo(song: [String: Any]) { |
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let title = song["title"] as? String ?? song["name"] as? String ?? "未知标题" |
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let artist = song["artist"] as? String ?? song["sgener"] as? String ?? "未知歌手" |
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let coverUrl = song["coverUrl"] as? String ?? song["image"] as? String ?? "" |
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var nowPlayingInfo: [String: Any] = [ |
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MPMediaItemPropertyTitle: song["title"] ?? "Unknown Title", |
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MPMediaItemPropertyArtist: song["artist"] ?? "Unknown Artist" |
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MPMediaItemPropertyTitle: title, |
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MPMediaItemPropertyArtist: artist |
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] |
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if let coverUrlString = song["coverUrl"], let coverUrl = URL(string: coverUrlString), |
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let data = try? Data(contentsOf: coverUrl), |
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// 异步加载封面图片 |
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if !coverUrl.isEmpty, let url = URL(string: coverUrl) { |
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DispatchQueue.global(qos: .background).async { |
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if let data = try? Data(contentsOf: url), |
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let image = UIImage(data: data) { |
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DispatchQueue.main.async { |
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nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { _ in image } |
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MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo |
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} |
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} else { |
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DispatchQueue.main.async { |
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MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo |
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} |
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} |
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} |
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} else { |
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MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo |
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} |
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} |
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private func updatePlaybackState() { |
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// iOS manages playback state automatically, but you can update NowPlayingInfo if needed |
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@ -170,14 +338,22 @@ public class MusicService: NSObject { |
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flutterChannel = channel |
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setupEnhancedRemoteCommandCenter() |
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startProgressTimer() |
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print("媒体会话回调已启用") |
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} |
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/// 更新媒体会话元数据 |
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public func updateMediaSessionMetadata(song: [String: Any]) { |
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let title = song["title"] as? String ?? song["name"] as? String ?? "Unknown Title" |
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let artist = song["artist"] as? String ?? song["sgener"] as? String ?? "Unknown Artist" |
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let title = song["title"] as? String ?? song["name"] as? String ?? "未知标题" |
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let artist = song["artist"] as? String ?? song["sgener"] as? String ?? "未知歌手" |
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let coverUrl = song["coverUrl"] as? String ?? song["image"] as? String ?? "" |
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// 更新当前歌曲ID |
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if let id = song["id"] as? NSNumber { |
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currentIdInternal = id.int64Value |
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} |
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print("updateMediaSessionMetadata currentIdInternal: \(currentIdInternal ?? 0)") |
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var nowPlayingInfo: [String: Any] = [ |
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MPMediaItemPropertyTitle: title, |
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MPMediaItemPropertyArtist: artist |
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@ -201,6 +377,8 @@ public class MusicService: NSObject { |
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} else { |
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MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo |
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} |
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print("媒体会话元数据已更新: \(title) - \(artist)") |
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} |
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/// 更新媒体会话播放状态 |
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@ -215,6 +393,8 @@ public class MusicService: NSObject { |
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} else { |
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stopProgressTimer() |
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} |
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print("媒体会话播放状态已更新: \(isPlaying)") |
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} |
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/// 设置增强的远程控制中心 |
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@ -226,6 +406,7 @@ public class MusicService: NSObject { |
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commandCenter.pauseCommand.removeTarget(nil) |
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commandCenter.nextTrackCommand.removeTarget(nil) |
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commandCenter.previousTrackCommand.removeTarget(nil) |
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commandCenter.changePlaybackPositionCommand.removeTarget(nil) |
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// 播放命令 |
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commandCenter.playCommand.addTarget { [weak self] _ in |
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@ -255,13 +436,12 @@ public class MusicService: NSObject { |
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return .success |
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} |
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// 跳转命令 |
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// 跳转命令 - 关键升级点 |
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commandCenter.changePlaybackPositionCommand.isEnabled = true |
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commandCenter.changePlaybackPositionCommand.addTarget { [weak self] event in |
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if let event = event as? MPChangePlaybackPositionCommandEvent { |
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let positionMs = Int(event.positionTime * 1000) |
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self?.seekTo(positionMs: positionMs) |
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self?.flutterChannel?.invokeMethod("onMediaSessionSeekTo", arguments: ["position": positionMs]) |
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return .success |
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} |
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return .commandFailed |
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@ -273,6 +453,8 @@ public class MusicService: NSObject { |
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self?.flutterChannel?.invokeMethod("onMediaSessionStop", arguments: nil) |
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return .success |
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} |
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print("增强的远程控制中心已设置，支持进度条滑动") |
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} |
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/// 启动进度定时器 |
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@ -297,11 +479,147 @@ public class MusicService: NSObject { |
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let duration = CMTimeGetSeconds(currentItem.duration) |
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if !currentTime.isNaN && !currentTime.isInfinite && !duration.isNaN && !duration.isInfinite { |
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// 更新系统媒体信息 - 关键升级点 |
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updateSystemMediaInfo(currentTime: currentTime, duration: duration) |
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// 通知Flutter层 |
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let currentPosition = Int(currentTime * 1000) |
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let totalDuration = Int(duration * 1000) |
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let progress = totalDuration > 0 ? Float(currentTime / duration) : 0.0 |
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flutterChannel?.invokeMethod("onMediaSessionProgress", arguments: [ |
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"currentIdInternal": currentIdInternal ?? 0, |
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"currentPosition": currentPosition, |
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"duration": totalDuration, |
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"progress": progress |
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|
]) |
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} |
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} |
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/// 立即更新进度信息（用于seekTo后） |
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private func updateProgressInfoImmediately() { |
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guard let player = player, let currentItem = player.currentItem else { return } |
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let currentTime = CMTimeGetSeconds(player.currentTime()) |
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let duration = CMTimeGetSeconds(currentItem.duration) |
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if !currentTime.isNaN && !currentTime.isInfinite && !duration.isNaN && !duration.isInfinite { |
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updateSystemMediaInfo(currentTime: currentTime, duration: duration) |
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} |
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} |
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/// 更新系统媒体信息 |
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|
|
private func updateSystemMediaInfo(currentTime: Double, duration: Double) { |
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|
var nowPlayingInfo = MPNowPlayingInfoCenter.default().nowPlayingInfo ?? [:] |
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|
nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = currentTime |
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|
nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = duration |
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|
nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = 1.0 |
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|
nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = isPlaying ? 1.0 : 0.0 |
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|
|
MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo |
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|
} |
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|
// MARK: - 播放完成处理 |
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|
|
private func setupPlayerObservers() { |
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|
guard let player = player else { return } |
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|
|
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|
|
NotificationCenter.default.addObserver( |
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|
|
forName: .AVPlayerItemDidPlayToEndTime, |
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|
object: player.currentItem, |
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|
|
queue: .main |
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|
|
) { [weak self] _ in |
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|
self?.stopProgressTimer() |
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|
|
self?.playNextOrStop() |
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|
|
} |
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|
|
} |
|
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|
|
|
|
|
// MARK: - 播放项观察者设置 |
|
|
|
private func setupPlayerItemObservers(playerItem: AVPlayerItem, song: [String: Any]) { |
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|
|
// 移除之前的观察者 |
|
|
|
NotificationCenter.default.removeObserver(self, name: .AVPlayerItemDidPlayToEndTime, object: nil) |
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|
|
NotificationCenter.default.removeObserver(self, name: .AVPlayerItemFailedToPlayToEndTime, object: nil) |
|
|
|
|
|
|
|
// 监听播放项状态 |
|
|
|
playerItem.addObserver(self, forKeyPath: "status", options: [.new, .initial], context: nil) |
|
|
|
playerItem.addObserver(self, forKeyPath: "duration", options: [.new], context: nil) |
|
|
|
playerItem.addObserver(self, forKeyPath: "loadedTimeRanges", options: [.new], context: nil) |
|
|
|
|
|
|
|
// 播放完成通知 |
|
|
|
NotificationCenter.default.addObserver( |
|
|
|
forName: .AVPlayerItemDidPlayToEndTime, |
|
|
|
object: playerItem, |
|
|
|
queue: .main |
|
|
|
) { [weak self] _ in |
|
|
|
print("歌曲播放完成") |
|
|
|
self?.stopProgressTimer() |
|
|
|
self?.playNextOrStop() |
|
|
|
} |
|
|
|
|
|
|
|
// 播放失败通知 |
|
|
|
NotificationCenter.default.addObserver( |
|
|
|
forName: .AVPlayerItemFailedToPlayToEndTime, |
|
|
|
object: playerItem, |
|
|
|
queue: .main |
|
|
|
) { [weak self] notification in |
|
|
|
print("播放失败: \(notification)") |
|
|
|
self?.isPlaying = false |
|
|
|
self?.updateMediaSessionPlaybackState(isPlaying: false) |
|
|
|
} |
|
|
|
|
|
|
|
// 存储歌曲信息，用于状态变化时更新 |
|
|
|
objc_setAssociatedObject(playerItem, "songInfo", song, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) |
|
|
|
} |
|
|
|
} |
|
|
|
// MARK: - KVO 观察者 |
|
|
|
override public func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) { |
|
|
|
guard let playerItem = object as? AVPlayerItem else { return } |
|
|
|
|
|
|
|
switch keyPath { |
|
|
|
case "status": |
|
|
|
switch playerItem.status { |
|
|
|
case .readyToPlay: |
|
|
|
print("播放项准备就绪，开始播放") |
|
|
|
|
|
|
|
// 获取关联的歌曲信息 |
|
|
|
if let song = objc_getAssociatedObject(playerItem, "songInfo") as? [String: Any] { |
|
|
|
updateNowPlayingInfo(song: song) |
|
|
|
} |
|
|
|
|
|
|
|
// 开始播放 |
|
|
|
player?.play() |
|
|
|
isPlaying = true |
|
|
|
updateMediaSessionPlaybackState(isPlaying: true) |
|
|
|
startProgressTimer() |
|
|
|
|
|
|
|
case .failed: |
|
|
|
print("播放项加载失败: \(playerItem.error?.localizedDescription ?? "未知错误")") |
|
|
|
isPlaying = false |
|
|
|
updateMediaSessionPlaybackState(isPlaying: false) |
|
|
|
|
|
|
|
case .unknown: |
|
|
|
print("播放项状态未知") |
|
|
|
|
|
|
|
@unknown default: |
|
|
|
break |
|
|
|
} |
|
|
|
|
|
|
|
case "duration": |
|
|
|
let duration = CMTimeGetSeconds(playerItem.duration) |
|
|
|
if !duration.isNaN && !duration.isInfinite && duration > 0 { |
|
|
|
print("获取到音频时长: \(duration) 秒") |
|
|
|
// 更新系统媒体信息 |
|
|
|
updateProgressInfoImmediately() |
|
|
|
} |
|
|
|
|
|
|
|
case "loadedTimeRanges": |
|
|
|
if let timeRange = playerItem.loadedTimeRanges.first?.timeRangeValue { |
|
|
|
let loadedDuration = CMTimeGetSeconds(CMTimeAdd(timeRange.start, timeRange.duration)) |
|
|
|
let totalDuration = CMTimeGetSeconds(playerItem.duration) |
|
|
|
if !totalDuration.isNaN && !totalDuration.isInfinite && totalDuration > 0 { |
|
|
|
let loadedPercentage = loadedDuration / totalDuration * 100 |
|
|
|
print("缓冲进度: \(String(format: "%.1f", loadedPercentage))%") |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
default: |
|
|
|
break |
|
|
|
} |
|
|
|
} |
|
|
|
|
