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引入播放列表库，同时引入全新的播放控制器，以控制读库与播放模式的动作，但是功能仍在完善，需要确认部分边界问题

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lxh2875931338
2026-08-27 22:29:20 +08:00
parent ad6617592e
commit e58be9c17f
6 changed files with 677 additions and 126 deletions
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lib/services/audio_service.dart
+87 -10
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@@ -3,12 +3,14 @@ import 'dart:async';
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:media_kit/media_kit.dart';
import 'package:media_kit/media_kit.dart' as media_kit; // ⭐ 加别名
import 'package:path_provider/path_provider.dart';
import 'playback_service.dart';
import '../metadata/metadata_service.dart';
import '../database/song_database.dart';
import '../utils/artwork_helper.dart';
import '../repositories/playlist_repository.dart';
import '../models/playlist.dart'; // ⭐ 你的 Playlist 模型
enum PlayMode {
sequential,
@@ -48,6 +50,9 @@ class AudioService extends ChangeNotifier {
List<int> _shuffledIndices = [];
int _shuffledIndex = -1;
// ---- 当前播放的歌单 ID（用于模式同步） ----
String? _currentPlaylistId;
// ---- 高频进度 ----
final ValueNotifier<Duration> positionNotifier = ValueNotifier(Duration.zero);
final ValueNotifier<Duration> durationNotifier = ValueNotifier(Duration.zero);
@@ -64,6 +69,10 @@ class AudioService extends ChangeNotifier {
// ⭐ 播放代数：每次切歌递增，用于校验异步任务是否过期
int _playbackGeneration = 0;
// ---- Repository ----
final SongDatabase _db = SongDatabase();
final PlaylistRepository _playlistRepo = PlaylistRepository();
// ---- Getter ----
Song? get currentSong => _currentSong;
bool get isPlaying => _isPlaying;
@@ -71,6 +80,7 @@ class AudioService extends ChangeNotifier {
List<Song> get queue => List.unmodifiable(_queue);
int get currentIndex => _currentIndex;
bool get hasQueue => _queue.isNotEmpty;
String? get currentPlaylistId => _currentPlaylistId;
Duration get position => positionNotifier.value;
Duration get duration => durationNotifier.value;
@@ -91,6 +101,7 @@ class AudioService extends ChangeNotifier {
_onSongChanged = callback;
}
// ---- 切换播放模式（同步更新歌单） ----
void togglePlayMode() {
switch (_playMode) {
case PlayMode.sequential:
@@ -104,8 +115,14 @@ class AudioService extends ChangeNotifier {
break;
}
notifyListeners();
// ⭐ 如果有当前歌单，同步更新歌单的播放模式
if (_currentPlaylistId != null) {
_playlistRepo.updatePlaylistPlayMode(_currentPlaylistId!, _playMode);
}
}
// ---- 设置播放队列 ----
void setQueue(List<Song> queue, {int startIndex = 0}) {
if (queue.isEmpty) {
_clearQueue();
@@ -131,10 +148,14 @@ class AudioService extends ChangeNotifier {
_currentIndex = -1;
_shuffledIndices.clear();
_shuffledIndex = -1;
_currentPlaylistId = null;
stopPlay();
}
// ---- 播放指定歌曲 ----
Future<void> playSong(Song song) async {
// 播放单曲时清除歌单上下文
_currentPlaylistId = null;
if (_queue.isEmpty || _queue[_currentIndex].id != song.id) {
setQueue([song], startIndex: 0);
} else {
@@ -142,6 +163,66 @@ class AudioService extends ChangeNotifier {
}
}
// ════════════════════════════════════════════════════════════
// 播放歌单
// ════════════════════════════════════════════════════════════
/// 播放整个歌单
Future<void> playPlaylist(String playlistId, {int startIndex = 0}) async {
_currentPlaylistId = playlistId;
// 1. 获取歌单的播放模式
final playlist = await _playlistRepo.getPlaylist(playlistId);
if (playlist != null) {
_playMode = playlist.playMode;
}
// 2. 获取歌单歌曲 ID 列表
final songIds = await _playlistRepo.getPlaylistSongIds(playlistId);
if (songIds.isEmpty) return;
// 3. 将 song_id 转换为 Song 对象
final songs = <Song>[];
for (final id in songIds) {
final dbSong = await _db.getSongByPath(id);
if (dbSong != null) {
songs.add(Song(
id: dbSong['remote_path'] as String,
title: dbSong['title'] as String? ?? '',
artist: dbSong['artist'] as String? ?? '未知艺术家',
url: dbSong['remote_path'] as String,
));
} else {
// 如果 songs 表中没有记录，用路径作为 fallback
songs.add(Song(
id: id,
title: id.split('/').last.replaceAll(RegExp(r'\.[^.]*$'), ''),
artist: '未知艺术家',
url: id,
));
}
}
if (songs.isNotEmpty) {
setQueue(songs, startIndex: startIndex);
}
}
/// 将当前播放队列保存为歌单
Future<Playlist> saveQueueAsPlaylist(String name) async {
// ⭐ 等待 createPlaylist 返回 Playlist 对象
final playlist = await _playlistRepo.createPlaylist(name);
for (int i = 0; i < _queue.length; i++) {
final song = _queue[i];
await _playlistRepo.addSong(playlist.id, song.id);
}
return playlist; // ⭐ 直接返回 Playlist 对象
}
// ════════════════════════════════════════════════════════════
// 播放核心
// ════════════════════════════════════════════════════════════
void _playCurrent() {
if (_currentIndex < 0 || _currentIndex >= _queue.length) {
stopPlay();
@@ -177,9 +258,6 @@ class AudioService extends ChangeNotifier {
return raw.hashCode.toString();
}
// ⭐ 核心：带 generation 校验的 metadata 加载
// lib/services/audio_service.dart
Future<void> _loadMetadataForCurrentSong(int generation) async {
if (_currentIndex < 0 || _currentIndex >= _queue.length) return;
@@ -188,7 +266,6 @@ class AudioService extends ChangeNotifier {
final songId = song.id;
if (song.url == null || song.url!.isEmpty) {
// 没有 URL，直接推送 fallback
_onSongChanged?.call(song);
return;
}
@@ -200,7 +277,6 @@ class AudioService extends ChangeNotifier {
fileId: song.id,
);
// generation 校验
if (_playbackGeneration != generation) {
debugPrint('⚠️ [AudioService] metadata stale (generation), ignoring');
return;
@@ -215,7 +291,6 @@ class AudioService extends ChangeNotifier {
return;
}
// 更新 Song
final updatedSong = Song(
id: song.id,
title: metadata.title.isNotEmpty ? metadata.title : song.title,
@@ -227,18 +302,16 @@ class AudioService extends ChangeNotifier {
_currentSong = updatedSong;
notifyListeners();
// ⭐ 一次性推送完整数据（含 artwork）
_onSongChanged?.call(updatedSong);
debugPrint(
'✅ [AudioService] metadata updated: ${updatedSong.title} - ${updatedSong.artist} (generation $generation)');
} catch (e) {
debugPrint('⚠️ [AudioService] metadata load failed: $e, using fallback');
// 异常时推送 fallback（无 artwork）
_onSongChanged?.call(song);
}
}
/// 清除当前歌曲的缓存（metadata + 封面图 + 文件缓存），并强制重新播放
/// 清除当前歌曲的缓存
Future<void> clearCurrentSongCache() async {
if (_currentSong == null) return;
final song = _currentSong!;
@@ -294,6 +367,7 @@ class AudioService extends ChangeNotifier {
}
}
// ---- 下一首 ----
void next() {
if (_queue.isEmpty) return;
@@ -311,6 +385,7 @@ class AudioService extends ChangeNotifier {
_playCurrent();
}
// ---- 上一首 ----
void previous() {
if (_queue.isEmpty) return;
@@ -336,6 +411,7 @@ class AudioService extends ChangeNotifier {
_playCurrent();
}
// ---- 播放/暂停 ----
void togglePlay() {
if (_currentSong == null) return;
@@ -371,6 +447,7 @@ class AudioService extends ChangeNotifier {
_currentIndex = -1;
_shuffledIndices.clear();
_shuffledIndex = -1;
_currentPlaylistId = null;
stopPlay();
notifyListeners();
}