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https://github.com/Dr-Blank/Vaani.git
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更改播放音频方式
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rang
parent
4a02b757bc
commit
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25 changed files with 2102 additions and 1250 deletions
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import 'dart:async';
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import 'package:http/http.dart' as http;
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import 'package:logging/logging.dart';
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import 'package:shelfsdk/audiobookshelf_api.dart';
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import 'package:vaani/features/player/core/audiobook_player.dart';
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import 'package:vaani/shared/extensions/obfuscation.dart';
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final _logger = Logger('PlaybackReporter');
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/// this playback reporter will watch the player and report to the server
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///
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/// it will by default report every 10 seconds
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/// and also report when the player is paused/stopped/finished/playing
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class PlaybackReporter {
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/// The player to watch
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final AudiobookPlayer player;
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/// the api to report to
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final AudiobookshelfApi authenticatedApi;
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/// The stopwatch to keep track of the time since the last report
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///
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/// this should only run when media is playing
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final _stopwatch = Stopwatch();
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/// subscriptions to listen and then cancel when disposing
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final List<StreamSubscription> _subscriptions = [];
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Duration _reportingInterval;
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/// the duration to wait before reporting
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Duration get reportingInterval => _reportingInterval;
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set reportingInterval(Duration value) {
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_reportingInterval = value;
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_cancelReportTimer();
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_setReportTimerIfNotAlready();
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_logger.info('set interval: $value');
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}
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/// the minimum duration to report
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final Duration reportingDurationThreshold;
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/// the duration to wait before starting the reporting
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/// this is to ignore the initial duration in case user is browsing
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final Duration? minimumPositionForReporting;
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/// the duration to mark the book as complete when the time left is less than this
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final Duration markCompleteWhenTimeLeft;
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/// timer to report every 10 seconds
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/// tracking the time since the last report
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Timer? _reportTimer;
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PlaybackReporter(
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this.player,
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this.authenticatedApi, {
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required PlaybackSession session,
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this.reportingDurationThreshold = const Duration(seconds: 1),
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Duration reportingInterval = const Duration(seconds: 10),
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this.minimumPositionForReporting,
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this.markCompleteWhenTimeLeft = const Duration(seconds: 5),
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}) : _reportingInterval = reportingInterval,
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_session = session {
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// initial conditions
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if (player.playing) {
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_stopwatch.start();
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_setReportTimerIfNotAlready();
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_logger.fine('starting stopwatch');
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} else {
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_logger.fine('not starting stopwatch');
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}
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_subscriptions.add(
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player.playerStateStream.listen((state) async {
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// set timer if any book is playing and cancel if not
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if (player.book != null) {
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if (state.playing) {
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_setReportTimerIfNotAlready();
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} else {
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_cancelReportTimer();
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}
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} else if (player.book == null && _reportTimer != null) {
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_logger.info('book is null, closing session');
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await closeSession();
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_cancelReportTimer();
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}
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// start or stop the stopwatch based on the playing state
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if (state.playing) {
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_stopwatch.start();
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_logger.fine(
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'player state observed, starting stopwatch at ${_stopwatch.elapsed}',
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);
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} else if (!state.playing) {
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_stopwatch.stop();
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_logger.fine(
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'player state observed, stopping stopwatch at ${_stopwatch.elapsed}',
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);
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await tryReportPlayback(null);
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}
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}),
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);
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_logger.fine(
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'initialized with reportingInterval: $reportingInterval, reportingDurationThreshold: $reportingDurationThreshold',
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);
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_logger.fine(
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'initialized with minimumPositionForReporting: $minimumPositionForReporting, markCompleteWhenTimeLeft: $markCompleteWhenTimeLeft',
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);
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}
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Future<void> tryReportPlayback(_) async {
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_logger.fine(
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'callback called when elapsed ${_stopwatch.elapsed}',
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);
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if (player.book != null &&
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player.positionInBook >=
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player.book!.duration - markCompleteWhenTimeLeft) {
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_logger.info(
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'marking complete as time left is less than $markCompleteWhenTimeLeft',
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);
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await markComplete();
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return;
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}
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if (_stopwatch.elapsed > reportingDurationThreshold) {
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_logger.fine(
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'reporting now with elapsed ${_stopwatch.elapsed} > threshold $reportingDurationThreshold',
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);
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await syncCurrentPosition();
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}
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}
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/// dispose the timer
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Future<void> dispose() async {
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for (var sub in _subscriptions) {
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sub.cancel();
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}
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await closeSession();
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_stopwatch.stop();
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_reportTimer?.cancel();
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_logger.fine('disposed');
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}
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/// current sessionId
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/// this is used to report the playback
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PlaybackSession? _session;
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String? get sessionId => _session?.id;
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Future<void> markComplete() async {
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if (player.book == null) {
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throw NoAudiobookPlayingError();
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}
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await authenticatedApi.me.createUpdateMediaProgress(
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libraryItemId: player.book!.libraryItemId,
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parameters: CreateUpdateProgressReqParams(
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isFinished: true,
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currentTime: player.positionInBook,
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duration: player.book!.duration,
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),
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responseErrorHandler: _responseErrorHandler,
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);
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_logger.info('Marked complete for book: ${player.book!.libraryItemId}');
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}
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Future<void> syncCurrentPosition() async {
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final data = _getSyncData();
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if (data == null) {
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await closeSession();
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}
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final currentPosition = player.positionInBook;
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await authenticatedApi.sessions.syncOpen(
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sessionId: sessionId!,
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parameters: _getSyncData()!,
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responseErrorHandler: _responseErrorHandler,
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);
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_logger.fine(
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'Synced position: $currentPosition with timeListened: ${_stopwatch.elapsed} for session: $sessionId',
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);
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// reset the stopwatch
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_stopwatch.reset();
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}
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Future<void> closeSession() async {
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if (sessionId == null) {
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_logger.warning('No session to close');
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return;
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}
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await authenticatedApi.sessions.closeOpen(
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sessionId: sessionId!,
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parameters: _getSyncData(),
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responseErrorHandler: _responseErrorHandler,
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);
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_session = null;
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_logger.info('Closed session');
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}
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void _setReportTimerIfNotAlready() {
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if (_reportTimer != null) return;
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_reportTimer = Timer.periodic(_reportingInterval, tryReportPlayback);
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_logger.fine('set timer with interval: $_reportingInterval');
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}
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void _cancelReportTimer() {
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_reportTimer?.cancel();
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_reportTimer = null;
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_logger.fine('cancelled timer');
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}
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void _responseErrorHandler(http.Response response, [error]) {
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if (response.statusCode != 200) {
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_logger.severe('Error with api: ${response.obfuscate()}, $error');
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throw PlaybackSyncError(
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'Error syncing position: ${response.body}, $error',
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);
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}
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}
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SyncSessionReqParams? _getSyncData() {
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if (player.book?.libraryItemId != _session?.libraryItemId) {
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_logger.info(
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'Book changed, not syncing position for session: $sessionId',
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);
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return null;
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}
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// if in the ignore duration, don't sync
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if (minimumPositionForReporting != null &&
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player.positionInBook < minimumPositionForReporting!) {
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// but if elapsed time is more than the minimumPositionForReporting, sync
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if (_stopwatch.elapsed > minimumPositionForReporting!) {
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_logger.info(
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'Syncing position despite being less than minimumPositionForReporting as elapsed time is more: ${_stopwatch.elapsed}',
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);
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} else {
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_logger.info(
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'Ignoring sync for position: ${player.positionInBook} < $minimumPositionForReporting',
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);
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return null;
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}
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}
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return SyncSessionReqParams(
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currentTime: player.positionInBook,
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timeListened: _stopwatch.elapsed,
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duration: player.book?.duration ?? Duration.zero,
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);
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}
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}
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class PlaybackSyncError implements Exception {
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String message;
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PlaybackSyncError([this.message = 'Error syncing playback']);
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@override
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String toString() {
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return 'PlaybackSyncError: $message';
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}
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}
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class NoAudiobookPlayingError implements Exception {
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String message;
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NoAudiobookPlayingError([this.message = 'No audiobook is playing']);
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@override
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String toString() {
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return 'NoAudiobookPlayingError: $message';
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}
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}
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