Add setIosCategory noop for web

README.md

@@ -84,6 +84,24 @@ If you wish to connect to non-HTTPS URLS, add the following to your `Info.plist`
 </dict>
 ```
 
+By default, iOS will mute your app's audio when your phone is switched to
+silent mode. Depending on the requirements of your app, you can change the
+default audio session category using `AudioPlayer.setIosCategory`. For example,
+if you are writing a media app, Apple recommends that you set the category to
+`AVAudioSessionCategoryPlayback`, which you can achieve by adding the following
+code to your app's initialisation:
+
+```dart
+AudioPlayer.setIosCategory(IosCategory.playback);
+```
+
+Note: If your app uses a number of different audio plugins in combination, e.g.
+for audio recording, or text to speech, or background audio, it is possible
+that those plugins may internally override the setting you choose here. You may
+consider asking the developer of each other plugin you use to provide a similar
+method so that you can configure the same audio session category universally
+across all plugins you use.
+
 ### MacOS
 
 To allow your MacOS application to access audio files on the Internet, add the following to your `DebugProfile.entitlements` and `Release.entitlements` files:

lib/just_audio.dart

@@ -50,18 +50,22 @@ class AudioPlayer {
     return MethodChannel('com.ryanheise.just_audio.methods.$id');
   }
 
-  /// Configure the audio session category on iOS. Has no effect on Android.
+  /// Configure the audio session category on iOS. This method should be called
+  /// before playing any audio. It has no effect on Android or Flutter for Web.
   ///
   /// Note that the default category on iOS is [IosCategory.soloAmbient], but
-  /// for a typical media app, you will probably want to change this to
-  /// [IosCategory.playback].  If you wish to override the default, call this
-  /// method before playing any audio.
+  /// for a typical media app, Apple recommends setting this to
+  /// [IosCategory.playback]. If you don't call this method, `just_audio` will
+  /// respect any prior category that was already set on your app's audio
+  /// session and will leave it alone. If it hasn't been previously set, this
+  /// will be [IosCategory.soloAmbient]. But if another audio plugin in your
+  /// app has configured a particular category, that will also be left alone.
   ///
   /// Note: If you use other audio plugins in conjunction with this one, it is
-  /// possible that the other audio plugin may override the setting you choose
-  /// here. (You may consider asking the developer of each other plugin you use
-  /// to provide a similar method so that you can configure the same category
-  /// universally.)
+  /// possible that each of those audio plugins may override the setting you
+  /// choose here. (You may consider asking the developers of the other plugins
+  /// to provide similar configurability so that you have complete control over
+  /// setting the overall category that you want for your app.)
   static Future<void> setIosCategory(IosCategory category) async {
     await _mainChannel.invokeMethod('setIosCategory', category.index);
   }
@@ -147,16 +151,25 @@ class AudioPlayer {
                           url: data[5][1][4],
                           isPublic: data[5][1][5])),
             ));
-    _eventChannelStreamSubscription =
-        _eventChannelStream.listen(_playbackEventSubject.add, onError: _playbackEventSubject.addError);
-    _playbackStateSubject
-        .addStream(playbackEventStream.map((state) => state.state).distinct().handleError((err,stack){ /* noop */ }));
-    _bufferingSubject.addStream(
-        playbackEventStream.map((state) => state.buffering).distinct().handleError((err,stack){ /* noop */ }));
-    _bufferedPositionSubject.addStream(
-        playbackEventStream.map((state) => state.bufferedPosition).distinct().handleError((err,stack){ /* noop */ }));
-    _icyMetadataSubject.addStream(
-        playbackEventStream.map((state) => state.icyMetadata).distinct().handleError((err,stack){ /* noop */ }));
+    _eventChannelStreamSubscription = _eventChannelStream.listen(
+        _playbackEventSubject.add,
+        onError: _playbackEventSubject.addError);
+    _playbackStateSubject.addStream(playbackEventStream
+        .map((state) => state.state)
+        .distinct()
+        .handleError((err, stack) {/* noop */}));
+    _bufferingSubject.addStream(playbackEventStream
+        .map((state) => state.buffering)
+        .distinct()
+        .handleError((err, stack) {/* noop */}));
+    _bufferedPositionSubject.addStream(playbackEventStream
+        .map((state) => state.bufferedPosition)
+        .distinct()
+        .handleError((err, stack) {/* noop */}));
+    _icyMetadataSubject.addStream(playbackEventStream
+        .map((state) => state.icyMetadata)
+        .distinct()
+        .handleError((err, stack) {/* noop */}));
     _fullPlaybackStateSubject.addStream(Rx.combineLatest3<AudioPlaybackState,
             bool, IcyMetadata, FullAudioPlaybackState>(
         playbackStateStream,

lib/just_audio_web.dart

@@ -27,6 +27,8 @@ class JustAudioPlugin {
         final String id = call.arguments[0];
         new Html5AudioPlayer(id: id, registrar: registrar);
         return null;
+      case 'setIosCategory':
+        return null;
       default:
         throw PlatformException(code: 'Unimplemented');
     }