mirror of
https://github.com/Dr-Blank/Vaani.git
synced 2026-02-16 14:29:35 +00:00
462 lines
14 KiB
Dart
462 lines
14 KiB
Dart
// my_audio_handler.dart
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import 'dart:io';
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import 'package:audio_service/audio_service.dart';
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import 'package:collection/collection.dart';
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import 'package:flutter/foundation.dart';
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import 'package:hooks_riverpod/hooks_riverpod.dart';
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import 'package:just_audio/just_audio.dart';
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import 'package:logging/logging.dart';
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import 'package:rxdart/rxdart.dart';
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import 'package:shelfsdk/audiobookshelf_api.dart' hide NotificationSettings;
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import 'package:vaani/features/player/core/player_status.dart' as core;
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import 'package:vaani/features/player/providers/player_status_provider.dart';
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import 'package:vaani/features/settings/app_settings_provider.dart';
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import 'package:vaani/features/settings/models/app_settings.dart';
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import 'package:vaani/shared/extensions/chapter.dart';
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import 'package:vaani/shared/extensions/model_conversions.dart';
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// add a small offset so the display does not show the previous chapter for a split second
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final offset = Duration(milliseconds: 10);
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final _logger = Logger('AudiobookPlayer');
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class AbsAudioHandler extends BaseAudioHandler with QueueHandler, SeekHandler {
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final AudioPlayer _player = AudioPlayer();
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final Ref ref;
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BookExpanded? _book;
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BookExpanded? get book => _book;
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late NotificationSettings notificationSettings;
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final _currentChapterObject = BehaviorSubject<BookChapter?>.seeded(null);
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AbsAudioHandler(this.ref) {
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notificationSettings = ref.read(appSettingsProvider).notificationSettings;
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ref.listen(appSettingsProvider, (a, b) {
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if (a?.notificationSettings != b.notificationSettings) {
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notificationSettings = b.notificationSettings;
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}
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});
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final statusNotifier = ref.read(playerStatusProvider.notifier);
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// 转发播放状态
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_player.playbackEventStream.map(_transformEvent).pipe(playbackState);
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_player.playerStateStream.listen((event) {
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if (event.playing) {
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statusNotifier.setPlayStatusVerify(core.PlayStatus.playing);
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} else {
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statusNotifier.setPlayStatusVerify(core.PlayStatus.paused);
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}
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});
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_player.positionStream.distinct().listen((position) {
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final chapter = _book?.findChapterAtTime(positionInBook);
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if (chapter != currentChapter) {
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if (mediaItem.hasValue && chapter != null) {
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// updateMediaItem(
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// mediaItem.value!.copyWith(
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// duration: chapter.duration,
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// displayTitle: chapter.title,
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// ),
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// );
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}
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_currentChapterObject.sink.add(chapter);
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}
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});
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}
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// 加载有声书
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Future<void> setSourceAudiobook(
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BookExpanded book, {
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bool preload = true,
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required Uri baseUrl,
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required String token,
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Duration? initialPosition,
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List<Uri>? downloadedUris,
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}) async {
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final appSettings = loadOrCreateAppSettings();
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// if (book == null) {
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// _book = null;
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// _logger.info('Book is null, stopping player');
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// return stop();
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// }
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if (_book == book) {
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_logger.info('Book is the same, doing nothing');
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return;
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}
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_book = book;
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final trackToPlay = book.findTrackAtTime(initialPosition ?? Duration.zero);
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final trackToChapter =
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book.findChapterAtTime(initialPosition ?? Duration.zero);
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final initialIndex = book.tracks.indexOf(trackToPlay);
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final initialPositionInTrack = initialPosition != null
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? initialPosition - trackToPlay.startOffset
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: null;
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final title = appSettings.notificationSettings.primaryTitle
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.formatNotificationTitle(book);
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final album = appSettings.notificationSettings.secondaryTitle
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.formatNotificationTitle(book);
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// 添加所有音轨
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List<AudioSource> audioSources = book.tracks
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.map(
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(track) => AudioSource.uri(
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_getUri(track, downloadedUris, baseUrl: baseUrl, token: token),
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),
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)
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.toList();
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final item = MediaItem(
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id: book.libraryItemId,
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title: title,
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album: album,
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displayTitle: title,
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displaySubtitle: album,
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duration: trackToChapter.duration,
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artUri: Uri.parse(
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'$baseUrl/api/items/${book.libraryItemId}/cover?token=$token',
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),
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);
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addQueueItem(item);
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await _player
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.setAudioSources(
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audioSources,
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preload: preload,
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initialIndex: initialIndex,
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initialPosition: initialPositionInTrack,
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)
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.catchError((error) {
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_logger.shout('Error in setting audio source: $error');
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return null;
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});
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// _player.seek(initialPositionInTrack, index: initialIndex);
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await play();
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// 恢复上次播放位置（如果有）
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// if (initialPosition != null) {
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// await seekInBook(initialPosition);
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// }
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}
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// // 音轨切换处理
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// void _onTrackChanged(int trackIndex) {
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// if (_book == null) return;
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// // 可以在这里处理音轨切换逻辑，比如预加载下一音轨
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// // print('切换到音轨: ${_book!.tracks[trackIndex].title}');
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// }
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// 核心功能：跳转到指定章节
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Future<void> skipToChapter(int chapterId) async {
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if (_book == null) return;
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final chapter = _book!.chapters.firstWhere(
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(ch) => ch.id == chapterId,
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orElse: () => throw Exception('Chapter not found'),
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);
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await seekInBook(chapter.start + offset);
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}
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BookExpanded? get Book => _book;
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// 当前音轨
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AudioTrack? get currentTrack {
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if (_book == null || _player.currentIndex == null) {
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return null;
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}
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return _book!.tracks[_player.currentIndex!];
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}
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// 当前章节
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BookChapter? get currentChapter {
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return _currentChapterObject.value;
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}
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Duration get position => _player.position;
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Duration get positionInChapter {
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return _player.position +
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(currentTrack?.startOffset ?? Duration.zero) -
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(currentChapter?.start ?? Duration.zero);
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}
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Duration get positionInBook {
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return _player.position + (currentTrack?.startOffset ?? Duration.zero);
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}
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Duration get bufferedPositionInBook {
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return _player.bufferedPosition +
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(currentTrack?.startOffset ?? Duration.zero);
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}
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Duration? get chapterDuration => currentChapter?.duration;
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Stream<PlayerState> get playerStateStream => _player.playerStateStream;
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Stream<Duration> get positionStream => _player.positionStream;
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Stream<Duration> get positionStreamInBook {
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return _player.positionStream.map((position) {
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return position + (currentTrack?.startOffset ?? Duration.zero);
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});
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}
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Stream<Duration> get slowPositionStreamInBook {
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final superPositionStream = _player.createPositionStream(
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steps: 100,
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minPeriod: const Duration(milliseconds: 500),
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maxPeriod: const Duration(seconds: 1),
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);
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return superPositionStream.map((position) {
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return position + (currentTrack?.startOffset ?? Duration.zero);
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});
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}
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Stream<Duration> get bufferedPositionStreamInBook {
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return _player.bufferedPositionStream.map((position) {
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return position + (currentTrack?.startOffset ?? Duration.zero);
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});
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}
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Stream<Duration> get positionStreamInChapter {
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return _player.positionStream.distinct().map((position) {
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return position +
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(currentTrack?.startOffset ?? Duration.zero) -
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(currentChapter?.start ?? Duration.zero);
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});
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}
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Stream<BookChapter?> get chapterStream => _currentChapterObject.stream;
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Future<void> togglePlayPause() async {
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// check if book is set
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if (_book == null) {
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_logger.warning('No book is set, not toggling play/pause');
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}
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return switch (_player.playerState) {
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PlayerState(playing: var isPlaying) => isPlaying ? pause() : play(),
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};
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}
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// 播放控制方法
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@override
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Future<void> play() async {
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await _player.play();
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}
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@override
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Future<void> pause() async {
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await _player.pause();
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}
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// 重写上一曲/下一曲为章节导航
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@override
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Future<void> skipToNext() async {
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if (_book == null) {
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// 回退到默认行为
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return _player.seekToNext();
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}
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final chapter = currentChapter;
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if (chapter == null) {
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// 回退到默认行为
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return _player.seekToNext();
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}
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final chapterIndex = _book!.chapters.indexOf(chapter);
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if (chapterIndex < _book!.chapters.length - 1) {
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// 跳到下一章
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final nextChapter = _book!.chapters[chapterIndex + 1];
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await skipToChapter(nextChapter.id);
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}
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}
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@override
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Future<void> skipToPrevious() async {
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final chapter = currentChapter;
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if (_book == null || chapter == null) {
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return _player.seekToPrevious();
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}
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final currentIndex = _book!.chapters.indexOf(chapter);
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if (currentIndex > 0) {
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// 跳到上一章
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final prevChapter = _book!.chapters[currentIndex - 1];
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await skipToChapter(prevChapter.id);
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} else {
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// 已经是第一章，回到开头
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await seekInBook(Duration.zero);
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}
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}
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@override
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Future<void> seek(Duration position) async {
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// 这个 position 是当前音轨内的位置，我们不直接使用
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// 而是通过全局位置来控制
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final track = currentTrack;
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Duration startOffset = Duration.zero;
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if (track != null) {
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startOffset = track.startOffset;
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}
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await seekInBook(startOffset + position);
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}
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Future<void> setVolume(double volume) async {
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await _player.setVolume(volume);
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}
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@override
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Future<void> setSpeed(double speed) async {
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await _player.setSpeed(speed);
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}
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// 核心功能：跳转到全局时间位置
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Future<void> seekInBook(Duration globalPosition) async {
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if (_book == null) return;
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// 找到目标音轨和在音轨内的位置
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final track = _book!.findTrackAtTime(globalPosition);
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final index = _book!.tracks.indexOf(track);
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Duration positionInTrack = globalPosition - track.startOffset;
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if (positionInTrack < Duration.zero) {
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positionInTrack = Duration.zero;
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}
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// 切换到目标音轨具体位置
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await _player.seek(positionInTrack, index: index);
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}
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AudioPlayer get player => _player;
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PlaybackState _transformEvent(PlaybackEvent event) {
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return PlaybackState(
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controls: [
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if ((kIsWeb || !Platform.isAndroid) &&
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notificationSettings.mediaControls
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.contains(NotificationMediaControl.skipToPreviousChapter))
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MediaControl.skipToPrevious,
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if (notificationSettings.mediaControls
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.contains(NotificationMediaControl.rewind))
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MediaControl.rewind,
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if (_player.playing) MediaControl.pause else MediaControl.play,
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if (notificationSettings.mediaControls
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.contains(NotificationMediaControl.fastForward))
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MediaControl.fastForward,
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if ((kIsWeb || !Platform.isAndroid) &&
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notificationSettings.mediaControls
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.contains(NotificationMediaControl.skipToNextChapter))
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MediaControl.skipToNext,
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if (notificationSettings.mediaControls
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.contains(NotificationMediaControl.stop))
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MediaControl.stop,
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],
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systemActions: {
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// if (kIsWeb || !Platform.isAndroid) MediaAction.skipToPrevious,
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// MediaAction.rewind,
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MediaAction.seek,
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MediaAction.seekForward,
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MediaAction.seekBackward,
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// MediaAction.fastForward,
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// MediaAction.stop,
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// MediaAction.setSpeed,
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// if (kIsWeb || !Platform.isAndroid) MediaAction.skipToNext,
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},
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androidCompactActionIndices: const [1, 2, 3],
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processingState: const {
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ProcessingState.idle: AudioProcessingState.idle,
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ProcessingState.loading: AudioProcessingState.loading,
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ProcessingState.buffering: AudioProcessingState.buffering,
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ProcessingState.ready: AudioProcessingState.ready,
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ProcessingState.completed: AudioProcessingState.completed,
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}[_player.processingState] ??
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AudioProcessingState.idle,
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playing: _player.playing,
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updatePosition: positionInChapter,
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bufferedPosition: _player.bufferedPosition,
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speed: _player.speed,
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queueIndex: event.currentIndex,
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captioningEnabled: false,
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);
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}
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}
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Uri _getUri(
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AudioTrack track,
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List<Uri>? downloadedUris, {
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required Uri baseUrl,
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required String token,
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}) {
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// check if the track is in the downloadedUris
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final uri = downloadedUris?.firstWhereOrNull(
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(element) {
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return element.pathSegments.last == track.metadata?.filename;
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},
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);
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return uri ??
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Uri.parse('${baseUrl.toString()}${track.contentUrl}?token=$token');
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}
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extension FormatNotificationTitle on String {
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String formatNotificationTitle(BookExpanded book) {
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return replaceAllMapped(
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RegExp(r'\$(\w+)'),
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(match) {
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final type = match.group(1);
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return NotificationTitleType.values
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.firstWhere((element) => element.name == type)
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.extractFrom(book) ??
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match.group(0) ??
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'';
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},
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);
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}
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}
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extension NotificationTitleUtils on NotificationTitleType {
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String? extractFrom(BookExpanded book) {
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var bookMetadataExpanded = book.metadata.asBookMetadataExpanded;
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switch (this) {
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case NotificationTitleType.bookTitle:
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return bookMetadataExpanded.title;
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case NotificationTitleType.chapterTitle:
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// TODO: implement chapter title; depends on https://github.com/Dr-Blank/Vaani/issues/2
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return bookMetadataExpanded.title;
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case NotificationTitleType.author:
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return bookMetadataExpanded.authorName;
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case NotificationTitleType.narrator:
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return bookMetadataExpanded.narratorName;
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case NotificationTitleType.series:
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return bookMetadataExpanded.seriesName;
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case NotificationTitleType.subtitle:
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return bookMetadataExpanded.subtitle;
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case NotificationTitleType.year:
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return bookMetadataExpanded.publishedYear;
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}
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}
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}
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extension BookExpandedExtension on BookExpanded {
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BookChapter findChapterAtTime(Duration position) {
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return chapters.firstWhere(
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(element) {
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return element.start <= position && element.end >= position + offset;
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},
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orElse: () => chapters.first,
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);
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}
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AudioTrack findTrackAtTime(Duration position) {
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return tracks.firstWhere(
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(element) {
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return element.startOffset <= position &&
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element.startOffset + element.duration >= position + offset;
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},
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orElse: () => tracks.first,
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);
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}
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int findTrackIndexAtTime(Duration position) {
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return tracks.indexWhere((element) {
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return element.startOffset <= position &&
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element.startOffset + element.duration >= position + offset;
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});
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}
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Duration getTrackStartOffset(int index) {
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return tracks[index].startOffset;
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}
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}
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