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1765
lib/audio_service.dart
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1765
lib/audio_service.dart
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354
lib/audio_service_web.dart
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354
lib/audio_service_web.dart
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import 'dart:async';
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import 'dart:html' as html;
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import 'dart:js' as js;
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import 'package:audio_service/js/media_metadata.dart';
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import 'js/media_session_web.dart';
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import 'package:audio_service/audio_service.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_web_plugins/flutter_web_plugins.dart';
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const String _CUSTOM_PREFIX = 'custom_';
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class Art {
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String src;
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String type;
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String sizes;
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Art({this.src, this.type, this.sizes});
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}
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class AudioServicePlugin {
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int fastForwardInterval;
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int rewindInterval;
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Map params;
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bool started = false;
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ClientHandler clientHandler;
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BackgroundHandler backgroundHandler;
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static void registerWith(Registrar registrar) {
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AudioServicePlugin(registrar);
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}
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AudioServicePlugin(Registrar registrar) {
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clientHandler = ClientHandler(this, registrar);
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backgroundHandler = BackgroundHandler(this, registrar);
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}
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}
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class ClientHandler {
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final AudioServicePlugin plugin;
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final MethodChannel channel;
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ClientHandler(this.plugin, Registrar registrar)
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: channel = MethodChannel(
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'ryanheise.com/audioService',
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const StandardMethodCodec(),
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registrar.messenger,
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) {
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channel.setMethodCallHandler(handleServiceMethodCall);
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}
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Future<T> invokeMethod<T>(String method, [dynamic arguments]) =>
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channel.invokeMethod(method, arguments);
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Future<dynamic> handleServiceMethodCall(MethodCall call) async {
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switch (call.method) {
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case 'start':
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plugin.fastForwardInterval = call.arguments['fastForwardInterval'];
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plugin.rewindInterval = call.arguments['rewindInterval'];
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plugin.params = call.arguments['params'];
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plugin.started = true;
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return plugin.started;
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case 'connect':
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// No-op not really anything for us to do with connect on the web, the
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// streams should all be hydrated
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break;
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case 'disconnect':
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// No-op not really anything for us to do with disconnect on the web,
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// the streams should stay hydrated because everything is static and we
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// aren't working with isolates
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break;
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case 'isRunning':
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return plugin.started;
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case 'rewind':
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return plugin.backgroundHandler.invokeMethod('onRewind');
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case 'fastForward':
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return plugin.backgroundHandler.invokeMethod('onFastForward');
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case 'skipToPrevious':
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return plugin.backgroundHandler.invokeMethod('onSkipToPrevious');
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case 'skipToNext':
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return plugin.backgroundHandler.invokeMethod('onSkipToNext');
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case 'play':
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return plugin.backgroundHandler.invokeMethod('onPlay');
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case 'pause':
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return plugin.backgroundHandler.invokeMethod('onPause');
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case 'stop':
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return plugin.backgroundHandler.invokeMethod('onStop');
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case 'seekTo':
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return plugin.backgroundHandler
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.invokeMethod('onSeekTo', [call.arguments]);
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case 'prepareFromMediaId':
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return plugin.backgroundHandler
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.invokeMethod('onPrepareFromMediaId', [call.arguments]);
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case 'playFromMediaId':
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return plugin.backgroundHandler
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.invokeMethod('onPlayFromMediaId', [call.arguments]);
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case 'setBrowseMediaParent':
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return plugin.backgroundHandler
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.invokeMethod('onLoadChildren', [call.arguments]);
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case 'onClick':
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// No-op we don't really have the idea of a bluetooth button click on
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// the web
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break;
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case 'addQueueItem':
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return plugin.backgroundHandler
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.invokeMethod('onAddQueueItem', [call.arguments]);
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case 'addQueueItemAt':
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return plugin.backgroundHandler
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.invokeMethod('onQueueItemAt', call.arguments);
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case 'removeQueueItem':
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return plugin.backgroundHandler
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.invokeMethod('onRemoveQueueItem', [call.arguments]);
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case 'updateQueue':
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return plugin.backgroundHandler
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.invokeMethod('onUpdateQueue', [call.arguments]);
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case 'updateMediaItem':
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return plugin.backgroundHandler
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.invokeMethod('onUpdateMediaItem', [call.arguments]);
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case 'prepare':
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return plugin.backgroundHandler.invokeMethod('onPrepare');
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case 'playMediaItem':
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return plugin.backgroundHandler
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.invokeMethod('onPlayMediaItem', [call.arguments]);
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case 'skipToQueueItem':
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return plugin.backgroundHandler
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.invokeMethod('onSkipToMediaItem', [call.arguments]);
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case 'setRepeatMode':
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return plugin.backgroundHandler
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.invokeMethod('onSetRepeatMode', [call.arguments]);
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case 'setShuffleMode':
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return plugin.backgroundHandler
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.invokeMethod('onSetShuffleMode', [call.arguments]);
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case 'setRating':
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return plugin.backgroundHandler.invokeMethod('onSetRating',
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[call.arguments['rating'], call.arguments['extras']]);
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case 'setSpeed':
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return plugin.backgroundHandler
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.invokeMethod('onSetSpeed', [call.arguments]);
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default:
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if (call.method.startsWith(_CUSTOM_PREFIX)) {
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final result = await plugin.backgroundHandler
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.invokeMethod(call.method, call.arguments);
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return result;
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}
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throw PlatformException(
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code: 'Unimplemented',
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details: "The audio Service plugin for web doesn't implement "
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"the method '${call.method}'");
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}
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}
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}
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class BackgroundHandler {
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final AudioServicePlugin plugin;
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final MethodChannel channel;
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MediaItem mediaItem;
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BackgroundHandler(this.plugin, Registrar registrar)
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: channel = MethodChannel(
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'ryanheise.com/audioServiceBackground',
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const StandardMethodCodec(),
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registrar.messenger,
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) {
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channel.setMethodCallHandler(handleBackgroundMethodCall);
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}
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Future<T> invokeMethod<T>(String method, [dynamic arguments]) =>
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channel.invokeMethod(method, arguments);
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Future<dynamic> handleBackgroundMethodCall(MethodCall call) async {
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switch (call.method) {
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case 'started':
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return started(call);
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case 'ready':
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return ready(call);
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case 'stopped':
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return stopped(call);
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case 'setState':
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return setState(call);
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case 'setMediaItem':
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return setMediaItem(call);
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case 'setQueue':
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return setQueue(call);
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case 'androidForceEnableMediaButtons':
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//no-op
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break;
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default:
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throw PlatformException(
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code: 'Unimplemented',
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details:
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"The audio service background plugin for web doesn't implement "
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"the method '${call.method}'");
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}
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}
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Future<bool> started(MethodCall call) async => true;
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Future<dynamic> ready(MethodCall call) async => {
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'fastForwardInterval': plugin.fastForwardInterval ?? 30000,
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'rewindInterval': plugin.rewindInterval ?? 30000,
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'params': plugin.params
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};
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Future<void> stopped(MethodCall call) async {
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final session = html.window.navigator.mediaSession;
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session.metadata = null;
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plugin.started = false;
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mediaItem = null;
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plugin.clientHandler.invokeMethod('onStopped');
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}
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Future<void> setState(MethodCall call) async {
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final session = html.window.navigator.mediaSession;
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final List args = call.arguments;
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final List<MediaControl> controls = call.arguments[0]
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.map<MediaControl>((element) => MediaControl(
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action: MediaAction.values[element['action']],
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androidIcon: element['androidIcon'],
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label: element['label']))
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.toList();
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// Reset the handlers
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// TODO: Make this better... Like only change ones that have been changed
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try {
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session.setActionHandler('play', null);
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session.setActionHandler('pause', null);
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session.setActionHandler('previoustrack', null);
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session.setActionHandler('nexttrack', null);
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session.setActionHandler('seekbackward', null);
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session.setActionHandler('seekforward', null);
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session.setActionHandler('stop', null);
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} catch (e) {}
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int actionBits = 0;
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for (final control in controls) {
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try {
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switch (control.action) {
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case MediaAction.play:
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session.setActionHandler('play', AudioService.play);
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break;
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case MediaAction.pause:
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session.setActionHandler('pause', AudioService.pause);
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break;
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case MediaAction.skipToPrevious:
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session.setActionHandler(
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'previoustrack', AudioService.skipToPrevious);
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break;
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case MediaAction.skipToNext:
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session.setActionHandler('nexttrack', AudioService.skipToNext);
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break;
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// The naming convention here is a bit odd but seekbackward seems more
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// analagous to rewind than seekBackward
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case MediaAction.rewind:
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session.setActionHandler('seekbackward', AudioService.rewind);
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break;
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case MediaAction.fastForward:
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session.setActionHandler('seekforward', AudioService.fastForward);
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break;
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case MediaAction.stop:
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session.setActionHandler('stop', AudioService.stop);
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break;
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default:
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// no-op
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break;
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}
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} catch (e) {}
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int actionCode = 1 << control.action.index;
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actionBits |= actionCode;
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}
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for (int rawSystemAction in call.arguments[1]) {
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MediaAction action = MediaAction.values[rawSystemAction];
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switch (action) {
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case MediaAction.seekTo:
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try {
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setActionHandler('seekto', js.allowInterop((ActionResult ev) {
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print(ev.action);
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print(ev.seekTime);
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// Chrome uses seconds for whatever reason
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AudioService.seekTo(Duration(
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milliseconds: (ev.seekTime * 1000).round(),
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));
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}));
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} catch (e) {}
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break;
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default:
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// no-op
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break;
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}
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int actionCode = 1 << rawSystemAction;
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actionBits |= actionCode;
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}
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try {
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// Dart also doesn't expose setPositionState
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if (mediaItem != null) {
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print(
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'Setting positionState Duration(${mediaItem.duration.inSeconds}), PlaybackRate(${args[6] ?? 1.0}), Position(${Duration(milliseconds: args[4]).inSeconds})');
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// Chrome looks for seconds for some reason
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setPositionState(PositionState(
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duration: (mediaItem.duration?.inMilliseconds ?? 0) / 1000,
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playbackRate: args[6] ?? 1.0,
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position: (args[4] ?? 0) / 1000,
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));
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}
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} catch (e) {
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print(e);
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}
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plugin.clientHandler.invokeMethod('onPlaybackStateChanged', [
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args[2], // Processing state
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args[3], // Playing
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actionBits, // Action bits
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args[4], // Position
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args[5], // bufferedPosition
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args[6] ?? 1.0, // speed
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args[7] ?? DateTime.now().millisecondsSinceEpoch, // updateTime
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args[9], // repeatMode
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args[10], // shuffleMode
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]);
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}
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Future<void> setMediaItem(MethodCall call) async {
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mediaItem = MediaItem.fromJson(call.arguments);
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// This would be how we could pull images out of the cache... But nothing is actually cached on web
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final artUri = /* mediaItem.extras['artCacheFile'] ?? */
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mediaItem.artUri;
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try {
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metadata = MediaMetadata(MetadataLiteral(
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album: mediaItem.album,
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title: mediaItem.title,
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artist: mediaItem.artist,
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artwork: [
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MetadataArtwork(
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src: artUri,
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sizes: '512x512',
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)
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],
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));
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} catch (e) {
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print('Metadata failed $e');
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}
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plugin.clientHandler.invokeMethod('onMediaChanged', [mediaItem.toJson()]);
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}
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Future<void> setQueue(MethodCall call) async {
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plugin.clientHandler.invokeMethod('onQueueChanged', [call.arguments]);
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}
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}
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32
lib/js/media_metadata.dart
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32
lib/js/media_metadata.dart
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@ -0,0 +1,32 @@
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@JS()
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library media_metadata;
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import 'package:js/js.dart';
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@JS('MediaMetadata')
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class MediaMetadata {
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external MediaMetadata(MetadataLiteral md);
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}
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@JS()
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@anonymous
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class MetadataLiteral {
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external String get title;
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external String get album;
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external String get artist;
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external List<MetadataArtwork> get artwork;
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external factory MetadataLiteral(
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{String title,
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String album,
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String artist,
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List<MetadataArtwork> artwork});
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}
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@JS()
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@anonymous
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class MetadataArtwork {
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external String get src;
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external String get sizes;
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external String get type;
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external factory MetadataArtwork({String src, String sizes, String type});
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}
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36
lib/js/media_session_web.dart
Normal file
36
lib/js/media_session_web.dart
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@ -0,0 +1,36 @@
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@JS('navigator.mediaSession')
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library media_session_web;
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import 'package:js/js.dart';
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import 'media_metadata.dart';
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@JS('setActionHandler')
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external void setActionHandler(String action, Function(ActionResult) callback);
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@JS('setPositionState')
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external void setPositionState(PositionState state);
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@JS()
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@anonymous
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class ActionResult {
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external String get action;
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external double get seekTime;
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external factory ActionResult({String action, double seekTime});
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}
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@JS()
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@anonymous
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class PositionState {
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external double get duration;
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external double get playbackRate;
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external double get position;
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external factory PositionState({
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double duration,
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double playbackRate,
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double position,
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});
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}
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@JS('metadata')
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external set metadata(MediaMetadata metadata);
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