344 lines
11 KiB
Dart
344 lines
11 KiB
Dart
// Author: fengshengxiong
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// Date: 2024/5/30
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// Description: 音乐播放器控制器
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import 'dart:async';
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import 'dart:io';
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import 'package:flutter_cache_manager/flutter_cache_manager.dart';
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import 'package:get/get.dart';
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import 'package:just_audio/just_audio.dart';
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import 'package:tone_snap/components/base_easyloading.dart';
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import 'package:tone_snap/data/api/music_api.dart';
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import 'package:tone_snap/data/cache/music_cache_manager.dart';
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import 'package:tone_snap/data/enum/play_mode.dart';
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import 'package:tone_snap/data/models/music_model.dart';
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import 'package:tone_snap/data/models/player_model.dart';
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import 'package:tone_snap/data/storage/music_box.dart';
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import 'package:tone_snap/data/storage/offline_box.dart';
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import 'package:tone_snap/modules/sideb/music_bar/music_bar.dart';
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import 'package:tone_snap/routes/app_routes.dart';
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import 'package:tone_snap/utils/audio_util.dart';
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import 'package:tone_snap/utils/log_util.dart';
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import 'package:tone_snap/utils/num_util.dart';
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import 'package:tone_snap/utils/obj_util.dart';
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class MusicPlayerController extends GetxController {
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static MusicPlayerController get to => Get.put(MusicPlayerController(), permanent: true);
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final _player = AudioPlayer();
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StreamSubscription<Duration>? _bufferedSubscription;
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StreamSubscription<Duration?>? _durationSubscription;
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StreamSubscription<Duration>? _positionSubscription;
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StreamSubscription<PlayerState>? _playerStateSubscription;
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/// 总时长、已播放的时长、缓冲时长
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var totalDuration = Duration.zero.obs;
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var positionDuration = Duration.zero.obs;
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var bufferedDuration = Duration.zero.obs;
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/// 缓存管理器
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// final _cacheManager = DefaultCacheManager();
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final _cacheManager = MusicCacheManager.instance;
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/// 是否正在播放
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var isPlaying = false.obs;
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/// 播放器处理状态
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var processingState = ProcessingState.idle.obs;
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/// _player.seek(Duration.zero) 时，这可能会导致播放状态再次变为 completed。
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/// 为了避免这种情况，在处理 completed 状态时添加一个标志位，确保在处理完成状态时不会重复触发
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/// 是否已经处理过 completed 状态
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var _isCompletedHandled = false;
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/// 拖动开始时是否是播放状态
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var _seekFrontPlaying = true;
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/// 播放模式，默认列表循环
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var playMode = MusicBox().getPlayMode().obs;
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var _playModeIndex = 0;
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/// 播放历史 videoId 集合
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/// 随机播放切换到上一首时，从历史记录中取出上一个播放的 videoId
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final List<String> _playHistory = [];
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/// 播放列表
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var playlist = <Rx<MusicModel>>[].obs;
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/// 当前播放的歌曲索引
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var currentIndex = 0.obs;
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@override
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void onInit() {
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super.onInit();
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AudioUtil.configAudioSession();
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}
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@override
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void onClose() {
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MusicBar().hide();
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_cancelListening();
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_player.dispose();
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super.onClose();
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}
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void playMusic(String? videoId, {List<MusicModel>? playList, bool isCurrentPlaylist = false}) {
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if (videoId == null) return;
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if (!isCurrentPlaylist) {
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if (playList == null || playList.isEmpty) return;
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_playHistory.clear();
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playlist.value = playList.map((e) => e.obs).toList();
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}
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Rx<MusicModel>? model = playlist.firstWhereOrNull((e) => e.value.videoId == videoId);
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currentIndex.value = model != null ? playlist.indexOf(model) : 0;
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_startPlay();
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}
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Rx<MusicModel>? getMusicModel() {
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return playlist.isNotEmpty ? playlist[currentIndex.value] : null;
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}
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/// 播放歌曲
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Future<void> _startPlay() async {
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if (playlist.isNotEmpty) {
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resetPlaybackStatus();
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Get.currentRoute == AppRoutes.playPage ? MusicBar().hide() : MusicBar().show();
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try {
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MusicModel? model = OfflineBox().getList().firstWhereOrNull((e) => e.videoId == getMusicModel()!.value.videoId!);
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if (model != null && ObjUtil.isNotEmpty(model.localPath)) {
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// 有下载
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LogUtil.d('读取下载路径=${model.localPath}');
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if (!await File(model.localPath!).exists()) {
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BaseEasyLoading.toast('file does not exist');
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return;
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}
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await _player.setFilePath(model.localPath!);
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} else {
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// 无下载
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FileInfo? fileInfo = await MusicCacheManager.checkCache(getMusicModel()!.value.videoId!);
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if (fileInfo != null) {
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// 有缓存
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LogUtil.d('读取缓存路径=${fileInfo.file.path}');
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// 如果有缓存，使用缓存文件
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await _player.setFilePath(fileInfo.file.path);
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} else {
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// 无缓存
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final url = await _getMusicUrl();
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if (ObjUtil.isEmpty(url)) {
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return;
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}
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await _player.setUrl(url!);
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// 同时启动缓存下载
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_cacheManager.downloadFile(url, key: MusicCacheManager.getCacheKey(getMusicModel()!.value.videoId!)).then((fileInfo) {
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LogUtil.d('缓存下载路径=${fileInfo.file.path}');
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});
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}
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}
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_cancelListening();
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_addListening();
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_player.play();
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} catch (e) {
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LogUtil.e('Play failed: $e');
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BaseEasyLoading.toast('Play failed');
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}
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}
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}
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/// 获取当前歌曲的播放 url
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Future<String?> _getMusicUrl() async {
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PlayerModel? model = await MusicApi.player(videoId: playlist[currentIndex.value].value.videoId);
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if (model != null && model.streamingData != null) {
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var formats = model.streamingData?.formats;
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if (formats != null && playlist.isNotEmpty) {
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return formats[0].url;
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}
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}
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return null;
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}
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/// 监听
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void _addListening() {
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_durationSubscription = _player.durationStream.listen((duration) {
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totalDuration.value = duration ?? Duration.zero;
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});
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_positionSubscription = _player.positionStream.listen((position) {
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int comparison = position.compareTo(totalDuration.value);
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if (comparison > 0) {
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positionDuration.value = totalDuration.value;
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} else {
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positionDuration.value = position;
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}
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});
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_bufferedSubscription = _player.bufferedPositionStream.listen((bufferedPosition) {
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int comparison = bufferedPosition.compareTo(totalDuration.value);
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if (comparison > 0) {
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bufferedDuration.value = totalDuration.value;
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} else {
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bufferedDuration.value = bufferedPosition;
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}
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});
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_playerStateSubscription = _player.playerStateStream.listen((playerState) {
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isPlaying.value = _player.playing;
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processingState.value = playerState.processingState;
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switch (playerState.processingState) {
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case ProcessingState.idle:
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break;
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case ProcessingState.loading:
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break;
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case ProcessingState.buffering:
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break;
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case ProcessingState.ready:
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_isCompletedHandled = false;
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break;
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case ProcessingState.completed:
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if (!_isCompletedHandled) {
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_isCompletedHandled = true;
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_player.seek(Duration.zero);
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nextTrack(manualSwitch: false);
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}
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break;
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}
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});
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}
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/// 取消监听
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void _cancelListening() {
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_bufferedSubscription?.cancel();
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_durationSubscription?.cancel();
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_positionSubscription?.cancel();
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_playerStateSubscription?.cancel();
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}
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/// 将播放器的播放位置设置为指定的时间
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void seekToPosition(double value) {
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if (processingState.value == ProcessingState.ready) {
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positionDuration.value = Duration(seconds: value.toInt());
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_player.seek(positionDuration.value);
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}
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}
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/// 开始/结束拖动进度条
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Future<void> seekStartEnd(int value) async {
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if (processingState.value == ProcessingState.buffering || processingState.value == ProcessingState.ready) {
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if (value == 0) {
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_seekFrontPlaying = _player.playing;
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if (_player.playing) {
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_player.pause();
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}
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} else {
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// 拖动前如果是播放状态，拖动完成后恢复播放
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if (_seekFrontPlaying) {
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_player.play();
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}
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}
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}
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}
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/// 播放/暂停
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Future<void> playPause() async {
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if (_player.playing) {
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_player.pause();
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} else {
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if (processingState.value == ProcessingState.ready) {
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_player.play();
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}
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}
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}
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/// 上一首
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Future<void> previousTrack() async {
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if (playlist.length > 1) {
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switch(playMode.value) {
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case PlayMode.listLoop:
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currentIndex.value = (currentIndex.value - 1 + playlist.length) % playlist.length;
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_startPlay();
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break;
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case PlayMode.random:
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bool historyExist = false;
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for (var i = _playHistory.length - 1; i >= 0; --i) {
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var history = _playHistory[i];
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Rx<MusicModel>? model = playlist.firstWhereOrNull((e) => e.value.videoId == history);
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if (model != null) {
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currentIndex.value = playlist.indexOf(model);
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_playHistory.remove(history);
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historyExist = true;
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break;
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} else {
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_playHistory.remove(history);
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}
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}
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if (!historyExist) {
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currentIndex.value = _getRandomNumber();
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}
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_startPlay();
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break;
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case PlayMode.singleCycle:
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currentIndex.value = (currentIndex.value - 1 + playlist.length) % playlist.length;
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_startPlay();
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break;
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}
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}
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}
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/// 下一首
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Future<void> nextTrack({bool manualSwitch = true}) async {
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if (playlist.length > 1) {
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switch(playMode.value) {
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case PlayMode.listLoop:
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currentIndex.value = (currentIndex.value + 1) % playlist.length;
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_startPlay();
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break;
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case PlayMode.random:
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// 记录当前播放的索引
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_playHistory.add(getMusicModel()!.value.videoId!);
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currentIndex.value = _getRandomNumber();
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_startPlay();
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break;
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case PlayMode.singleCycle:
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if (manualSwitch) {
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currentIndex.value = (currentIndex.value + 1) % playlist.length;
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_startPlay();
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}
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break;
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}
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}
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}
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/// 在列表范围内生成一个不包括当前索引的随机数
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int _getRandomNumber() {
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return NumUtil.getRandomNumberExcludingCurrent(0, playlist.length, currentIndex.value);
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}
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/// 切换播放模式
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void switchPlayMode() {
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if (_playModeIndex >= PlayMode.values.length - 1) {
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_playModeIndex = 0;
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} else {
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_playModeIndex++;
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}
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playMode.value = PlayMode.values[_playModeIndex];
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MusicBox().putPlayMode(playMode.value);
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if (playMode.value == PlayMode.listLoop) {
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BaseEasyLoading.toast('List loop');
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}
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if (playMode.value == PlayMode.random) {
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BaseEasyLoading.toast('Shuffle Playback');
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}
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if (playMode.value == PlayMode.singleCycle) {
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BaseEasyLoading.toast('Single cycle');
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}
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}
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/// 重置播放状态
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Future<void> resetPlaybackStatus() async {
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await _player.stop();
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_player.seek(Duration.zero);
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totalDuration.value = Duration.zero;
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positionDuration.value = Duration.zero;
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bufferedDuration.value = Duration.zero;
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}
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}
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