657 lines
19 KiB
Dart
657 lines
19 KiB
Dart
import 'package:audio_service/audio_service.dart';
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import 'package:collection/collection.dart';
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import 'package:dio/dio.dart';
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import 'package:fluttertoast/fluttertoast.dart';
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import 'package:freezer/api/deezer.dart';
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import 'package:freezer/ui/cached_image.dart';
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import 'package:just_audio/just_audio.dart';
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import 'package:connectivity/connectivity.dart';
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import 'package:path/path.dart' as p;
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import 'package:path_provider/path_provider.dart';
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import 'definitions.dart';
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import '../settings.dart';
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import 'dart:io';
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import 'dart:async';
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import 'dart:convert';
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PlayerHelper playerHelper = PlayerHelper();
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class PlayerHelper {
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StreamSubscription _customEventSubscription;
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StreamSubscription _playbackStateStreamSubscription;
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QueueSource queueSource;
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RepeatType repeatType = RepeatType.NONE;
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//Find queue index by id
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int get queueIndex => AudioService.queue.indexWhere((mi) => mi.id == AudioService.currentMediaItem?.id??'Random string so it returns -1');
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Future start() async {
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//Subscribe to custom events
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_customEventSubscription = AudioService.customEventStream.listen((event) async {
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if (!(event is Map)) return;
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if (event['action'] == 'onLoad') {
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//After audio_service is loaded, load queue, set quality
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await settings.updateAudioServiceQuality();
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await AudioService.customAction('load');
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return;
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}
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if (event['action'] == 'onRestore') {
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//Load queueSource from isolate
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this.queueSource = QueueSource.fromJson(event['queueSource']);
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}
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if (event['action'] == 'queueEnd') {
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//If last song is played, load more queue
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this.queueSource = QueueSource.fromJson(event['queueSource']);
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print(queueSource.toJson());
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return;
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}
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});
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_playbackStateStreamSubscription = AudioService.playbackStateStream.listen((event) {
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//Log song (if allowed)
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if (event == null) return;
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if (event.processingState == AudioProcessingState.ready && event.playing) {
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if (settings.logListen) deezerAPI.logListen(AudioService.currentMediaItem.id);
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}
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});
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//Start audio_service
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_startService();
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}
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Future _startService() async {
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if (AudioService.running) return;
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await AudioService.start(
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backgroundTaskEntrypoint: backgroundTaskEntrypoint,
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androidEnableQueue: true,
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androidStopForegroundOnPause: true,
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androidNotificationOngoing: false,
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androidNotificationClickStartsActivity: true,
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androidNotificationChannelDescription: 'Freezer',
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androidNotificationChannelName: 'Freezer',
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androidNotificationIcon: 'drawable/ic_logo'
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);
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}
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//Repeat toggle
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Future changeRepeat() async {
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//Change to next repeat type
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switch (repeatType) {
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case RepeatType.NONE:
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repeatType = RepeatType.LIST; break;
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case RepeatType.LIST:
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repeatType = RepeatType.TRACK; break;
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default:
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repeatType = RepeatType.NONE; break;
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}
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//Set repeat type
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await AudioService.customAction("repeatType", RepeatType.values.indexOf(repeatType));
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}
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//Executed before exit
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Future onExit() async {
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_customEventSubscription.cancel();
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_playbackStateStreamSubscription.cancel();
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}
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//Replace queue, play specified track id
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Future _loadQueuePlay(List<MediaItem> queue, String trackId) async {
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await _startService();
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await settings.updateAudioServiceQuality();
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await AudioService.updateQueue(queue);
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await AudioService.playFromMediaId(trackId);
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}
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//Play track from album
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Future playFromAlbum(Album album, String trackId) async {
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await playFromTrackList(album.tracks, trackId, QueueSource(
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id: album.id,
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text: album.title,
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source: 'album'
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));
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}
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//Play from artist top tracks
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Future playFromTopTracks(List<Track> tracks, String trackId, Artist artist) async {
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await playFromTrackList(tracks, trackId, QueueSource(
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id: artist.id,
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text: 'Top ${artist.name}',
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source: 'topTracks'
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));
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}
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Future playFromPlaylist(Playlist playlist, String trackId) async {
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await playFromTrackList(playlist.tracks, trackId, QueueSource(
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id: playlist.id,
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text: playlist.title,
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source: 'playlist'
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));
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}
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//Load tracks as queue, play track id, set queue source
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Future playFromTrackList(List<Track> tracks, String trackId, QueueSource queueSource) async {
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await _startService();
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List<MediaItem> queue = tracks.map<MediaItem>((track) => track.toMediaItem()).toList();
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await setQueueSource(queueSource);
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await _loadQueuePlay(queue, trackId);
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}
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//Load smart track list as queue, start from beginning
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Future playFromSmartTrackList(SmartTrackList stl) async {
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//Load from API if no tracks
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if (stl.tracks == null || stl.tracks.length == 0) {
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if (settings.offlineMode) {
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Fluttertoast.showToast(
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msg: "Offline mode, can't play flow/smart track lists.",
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gravity: ToastGravity.BOTTOM,
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toastLength: Toast.LENGTH_SHORT
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);
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return;
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}
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//Flow songs cannot be accessed by smart track list call
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if (stl.id == 'flow') {
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stl.tracks = await deezerAPI.flow();
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} else {
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stl = await deezerAPI.smartTrackList(stl.id);
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}
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}
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QueueSource queueSource = QueueSource(
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id: stl.id,
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source: (stl.id == 'flow')?'flow':'smarttracklist',
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text: stl.title
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);
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await playFromTrackList(stl.tracks, stl.tracks[0].id, queueSource);
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}
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Future setQueueSource(QueueSource queueSource) async {
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await _startService();
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this.queueSource = queueSource;
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await AudioService.customAction('queueSource', queueSource.toJson());
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}
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}
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void backgroundTaskEntrypoint() async {
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AudioServiceBackground.run(() => AudioPlayerTask());
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}
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class AudioPlayerTask extends BackgroundAudioTask {
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AudioPlayer _audioPlayer = AudioPlayer();
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List<MediaItem> _queue = <MediaItem>[];
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int _queueIndex = -1;
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bool _playing;
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bool _interrupted;
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AudioProcessingState _skipState;
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Duration _lastPosition;
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ImagesDatabase imagesDB;
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int mobileQuality;
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int wifiQuality;
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StreamSubscription _eventSub;
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StreamSubscription _playerStateSub;
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QueueSource queueSource;
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int repeatType = 0;
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MediaItem get mediaItem => _queue[_queueIndex];
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//Controls
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final playControl = MediaControl(
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androidIcon: 'drawable/ic_play_arrow',
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label: 'Play',
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action: MediaAction.play
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);
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final pauseControl = MediaControl(
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androidIcon: 'drawable/ic_pause',
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label: 'Pause',
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action: MediaAction.pause
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);
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final stopControl = MediaControl(
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androidIcon: 'drawable/ic_stop',
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label: 'Stop',
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action: MediaAction.stop
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);
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final nextControl = MediaControl(
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androidIcon: 'drawable/ic_skip_next',
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label: 'Next',
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action: MediaAction.skipToNext
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);
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final previousControl = MediaControl(
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androidIcon: 'drawable/ic_skip_previous',
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label: 'Previous',
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action: MediaAction.skipToPrevious
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);
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@override
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Future onStart(Map<String, dynamic> params) async {
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_playerStateSub = _audioPlayer.playbackStateStream
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.where((state) => state == AudioPlaybackState.completed)
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.listen((_event) {
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if (_queue.length > _queueIndex + 1) {
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onSkipToNext();
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return;
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} else {
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//Repeat whole list (if enabled)
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if (repeatType == 1) {
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_skip(-_queueIndex);
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return;
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}
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//Ask for more tracks in queue
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AudioServiceBackground.sendCustomEvent({
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'action': 'queueEnd',
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'queueSource': (queueSource??QueueSource()).toJson()
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});
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if (_playing) _playing = false;
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_setState(AudioProcessingState.none);
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return;
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}
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});
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//Read audio player events
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_eventSub = _audioPlayer.playbackEventStream.listen((event) {
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AudioProcessingState bufferingState = event.buffering ? AudioProcessingState.buffering : null;
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switch (event.state) {
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case AudioPlaybackState.paused:
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case AudioPlaybackState.playing:
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_setState(bufferingState ?? AudioProcessingState.ready, pos: event.position);
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break;
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case AudioPlaybackState.connecting:
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_setState(_skipState ?? AudioProcessingState.connecting, pos: event.position);
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break;
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default:
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break;
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}
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});
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//Initialize later
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//await imagesDB.init();
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AudioServiceBackground.setQueue(_queue);
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AudioServiceBackground.sendCustomEvent({'action': 'onLoad'});
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}
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@override
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Future onSkipToNext() {
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//If repeating allowed
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if (repeatType == 2) {
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_skip(0);
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return null;
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}
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_skip(1);
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}
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@override
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Future onSkipToPrevious() => _skip(-1);
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Future _skip(int offset) async {
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int newPos = _queueIndex + offset;
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//Out of bounds
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if (newPos >= _queue.length || newPos < 0) return;
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//First song
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if (_playing == null) {
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_playing = true;
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} else if (_playing) {
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await _audioPlayer.stop();
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}
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//Update position, album art source, queue source text
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_queueIndex = newPos;
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//Get uri
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String uri = await _getTrackUri(mediaItem);
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//Modify extras
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Map<String, dynamic> extras = mediaItem.extras;
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extras.addAll({"qualityString": await _getQualityString(uri, mediaItem.duration)});
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_queue[_queueIndex] = mediaItem.copyWith(
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artUri: await _getArtUri(mediaItem.artUri),
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extras: extras
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);
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//Play
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AudioServiceBackground.setMediaItem(mediaItem);
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_skipState = offset > 0 ? AudioProcessingState.skippingToNext:AudioProcessingState.skippingToPrevious;
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//Load
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await _audioPlayer.setUrl(uri);
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_skipState = null;
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await _saveQueue();
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(_playing??false) ? onPlay() : _setState(AudioProcessingState.ready);
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}
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@override
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void onPlay() async {
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//Start playing preloaded queue
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if (AudioServiceBackground.state.processingState == AudioProcessingState.none && _queue.length > 0) {
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if (_queueIndex < 0 || _queueIndex == null) {
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await this._skip(1);
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} else {
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await this._skip(0);
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}
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//Restore position from saved queue
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if (_lastPosition != null) {
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onSeekTo(_lastPosition);
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_lastPosition = null;
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}
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return;
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}
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if (_skipState == null) {
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_playing = true;
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_audioPlayer.play();
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}
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}
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@override
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void onPause() {
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if (_skipState == null && _playing) {
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_playing = false;
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_audioPlayer.pause();
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}
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}
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@override
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void onSeekTo(Duration pos) {
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_audioPlayer.seek(pos);
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}
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@override
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void onClick(MediaButton button) {
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if (_playing) onPause();
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onPlay();
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}
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@override
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Future onUpdateQueue(List<MediaItem> q) async {
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this._queue = q;
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AudioServiceBackground.setQueue(_queue);
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await _saveQueue();
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}
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@override
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void onPlayFromMediaId(String mediaId) async {
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int pos = this._queue.indexWhere((mi) => mi.id == mediaId);
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await _skip(pos - _queueIndex);
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if (_playing == null || !_playing) onPlay();
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}
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@override
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Future onFastForward() async {
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await _seekRelative(fastForwardInterval);
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}
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@override
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void onAddQueueItemAt(MediaItem mi, int index) {
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_queue.insert(index, mi);
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AudioServiceBackground.setQueue(_queue);
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_saveQueue();
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}
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@override
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void onAddQueueItem(MediaItem mi) {
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_queue.add(mi);
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AudioServiceBackground.setQueue(_queue);
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_saveQueue();
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}
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@override
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Future onRewind() async {
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await _seekRelative(rewindInterval);
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}
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Future _seekRelative(Duration offset) async {
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Duration newPos = _audioPlayer.playbackEvent.position + offset;
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if (newPos < Duration.zero) newPos = Duration.zero;
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if (newPos > mediaItem.duration) newPos = mediaItem.duration;
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onSeekTo(_audioPlayer.playbackEvent.position + offset);
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}
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//Audio interruptions
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@override
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void onAudioFocusLost(AudioInterruption interruption) {
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if (_playing) _interrupted = true;
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switch (interruption) {
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case AudioInterruption.pause:
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case AudioInterruption.temporaryPause:
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case AudioInterruption.unknownPause:
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if (_playing) onPause();
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break;
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case AudioInterruption.temporaryDuck:
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_audioPlayer.setVolume(0.5);
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break;
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}
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}
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@override
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void onAudioFocusGained(AudioInterruption interruption) {
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switch (interruption) {
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case AudioInterruption.temporaryPause:
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if (!_playing && _interrupted) onPlay();
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break;
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case AudioInterruption.temporaryDuck:
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_audioPlayer.setVolume(1.0);
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break;
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default:
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break;
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}
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_interrupted = false;
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}
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@override
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void onAudioBecomingNoisy() {
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onPause();
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}
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@override
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Future onCustomAction(String name, dynamic args) async {
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if (name == 'updateQuality') {
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//Pass wifi & mobile quality by custom action
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//Isolate can't access globals
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this.wifiQuality = args['wifiQuality'];
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this.mobileQuality = args['mobileQuality'];
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}
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if (name == 'saveQueue') {
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await this._saveQueue();
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}
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//Load queue, called after start
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if (name == 'load') {
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await _loadQueue();
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}
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//Change queue source
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if (name == 'queueSource') {
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this.queueSource = QueueSource.fromJson(Map<String, dynamic>.from(args));
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}
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//Shuffle
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if (name == 'shuffleQueue') {
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MediaItem mi = mediaItem;
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shuffle(this._queue);
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_queueIndex = _queue.indexOf(mi);
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AudioServiceBackground.setQueue(this._queue);
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}
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//Repeating
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if (name == 'repeatType') {
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this.repeatType = args;
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}
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return true;
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}
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Future<String> _getArtUri(String url) async {
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//Load from cache
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if (url.startsWith('http')) {
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//Prepare db
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if (imagesDB == null) {
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imagesDB = ImagesDatabase();
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await imagesDB.init();
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}
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String path = await imagesDB.getImage(url);
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return 'file://$path';
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}
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//If file
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if (url.startsWith('/')) return 'file://' + url;
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return url;
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}
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Future<String> _getTrackUri(MediaItem mi) async {
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String prefix = 'DEEZER|${mi.id}|';
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//Check if song is available offline
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String _offlinePath = p.join((await getExternalStorageDirectory()).path, 'offline/');
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File f = File(p.join(_offlinePath, mi.id));
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if (await f.exists()) return f.path;
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//Get online url
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Track t = Track(
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id: mi.id,
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playbackDetails: jsonDecode(mi.extras['playbackDetails']) //JSON Because of audio_service bug
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);
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ConnectivityResult conn = await Connectivity().checkConnectivity();
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if (conn == ConnectivityResult.wifi) {
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return prefix + t.getUrl(wifiQuality);
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}
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return prefix + t.getUrl(mobileQuality);
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}
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Future<String> _getQualityString(String uri, Duration duration) async {
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//Get url/path
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String url = uri;
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List<String> split = uri.split('|');
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if (split.length >= 3) url = split[2];
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int size;
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String format;
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String source;
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//Local file
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if (url.startsWith('/')) {
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//Read first 4 bytes of file, get format
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File f = File(url);
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Stream<List<int>> reader = f.openRead(0, 4);
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List<int> magic = await reader.first;
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format = _magicToFormat(magic);
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size = await f.length();
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source = 'Offline';
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}
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//URL
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if (url.startsWith('http')) {
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Dio dio = Dio();
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Response response = await dio.head(url);
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size = int.parse(response.headers['Content-Length'][0]);
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//Parse format
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format = response.headers['Content-Type'][0];
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if (format.trim() == 'audio/mpeg') format = 'MP3';
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if (format.trim() == 'audio/flac') format = 'FLAC';
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source = 'Stream';
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}
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//Calculate
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int bitrate = ((size / 125) / duration.inSeconds).floor();
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return '$format ${bitrate}kbps ($source)';
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}
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//Magic number to string, source: https://en.wikipedia.org/wiki/List_of_file_signatures
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String _magicToFormat(List<int> magic) {
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Function eq = const ListEquality().equals;
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if (eq(magic.sublist(0, 4), [0x66, 0x4c, 0x61, 0x43])) return 'FLAC';
|
|
//MP3 With ID3
|
|
if (eq(magic.sublist(0, 3), [0x49, 0x44, 0x33])) return 'MP3';
|
|
//MP3
|
|
List<int> m = magic.sublist(0, 2);
|
|
if (eq(m, [0xff, 0xfb]) ||eq(m, [0xff, 0xf3]) || eq(m, [0xff, 0xf2])) return 'MP3';
|
|
//Unknown
|
|
return 'UNK';
|
|
}
|
|
|
|
@override
|
|
void onTaskRemoved() async {
|
|
await _saveQueue();
|
|
onStop();
|
|
}
|
|
|
|
@override
|
|
Future onStop() async {
|
|
await _saveQueue();
|
|
|
|
if (_playing != null) _audioPlayer.stop();
|
|
if (_playerStateSub != null) _playerStateSub.cancel();
|
|
if (_eventSub != null) _eventSub.cancel();
|
|
|
|
await super.onStop();
|
|
}
|
|
|
|
@override
|
|
void onClose() async {
|
|
//await _saveQueue();
|
|
//Gets saved in onStop()
|
|
await onStop();
|
|
}
|
|
|
|
//Update state
|
|
void _setState(AudioProcessingState state, {Duration pos}) {
|
|
AudioServiceBackground.setState(
|
|
controls: _getControls(),
|
|
systemActions: (_playing == null) ? [] : [MediaAction.seekTo],
|
|
processingState: state ?? AudioServiceBackground.state.processingState,
|
|
playing: _playing ?? false,
|
|
position: pos ?? _audioPlayer.playbackEvent.position,
|
|
bufferedPosition: pos ?? _audioPlayer.playbackEvent.position,
|
|
speed: _audioPlayer.speed
|
|
);
|
|
}
|
|
|
|
List<MediaControl> _getControls() {
|
|
if (_playing == null || !_playing) {
|
|
//Paused / not-started
|
|
return [
|
|
previousControl,
|
|
playControl,
|
|
nextControl
|
|
];
|
|
}
|
|
//Playing
|
|
return [
|
|
previousControl,
|
|
pauseControl,
|
|
nextControl
|
|
];
|
|
}
|
|
|
|
//Get queue saved file path
|
|
Future<String> _getQueuePath() async {
|
|
Directory dir = await getApplicationDocumentsDirectory();
|
|
return p.join(dir.path, 'offline.json');
|
|
}
|
|
|
|
//Export queue to JSON
|
|
Future _saveQueue() async {
|
|
print('save');
|
|
File f = File(await _getQueuePath());
|
|
await f.writeAsString(jsonEncode({
|
|
'index': _queueIndex,
|
|
'queue': _queue.map<Map<String, dynamic>>((mi) => mi.toJson()).toList(),
|
|
'position': _audioPlayer.playbackEvent.position.inMilliseconds,
|
|
'queueSource': (queueSource??QueueSource()).toJson(),
|
|
}));
|
|
}
|
|
|
|
Future _loadQueue() async {
|
|
File f = File(await _getQueuePath());
|
|
if (await f.exists()) {
|
|
Map<String, dynamic> json = jsonDecode(await f.readAsString());
|
|
this._queue = (json['queue']??[]).map<MediaItem>((mi) => MediaItem.fromJson(mi)).toList();
|
|
this._queueIndex = json['index'] ?? -1;
|
|
this._lastPosition = Duration(milliseconds: json['position']??0);
|
|
this.queueSource = QueueSource.fromJson(json['queueSource']??{});
|
|
if (_queue != null) {
|
|
AudioServiceBackground.setQueue(_queue);
|
|
AudioServiceBackground.setMediaItem(mediaItem);
|
|
//Update state to allow play button in notification
|
|
this._setState(AudioProcessingState.none, pos: _lastPosition);
|
|
}
|
|
//Send restored queue source to ui
|
|
AudioServiceBackground.sendCustomEvent({'action': 'onRestore', 'queueSource': (queueSource??QueueSource()).toJson()});
|
|
return true;
|
|
}
|
|
}
|
|
|
|
} |