fix: stop audio track on mute. (#207)

* fix: stop audio track on mute.

* chore: Let audioBitrate preset to music.

* update.

* update depends.

* update.

lib/src/options.dart

@@ -130,6 +130,9 @@ class AudioPreset {
   static const telephone = 12000;
   static const speech = 20000;
   static const music = 32000;
+  static const musicStereo = 48000;
+  static const musicHighQuality = 64000;
+  static const musicHighQualityStereo = 96000;
 }
 
 /// Options used when publishing audio.
@@ -142,9 +145,14 @@ class AudioPublishOptions {
   /// max audio bitrate
   final int audioBitrate;
 
+  /// Turn off the audio track when muted, to avoid the microphone
+  /// indicator light on.
+  final bool stopMicTrackOnMute;
+
   const AudioPublishOptions({
     this.dtx = true,
-    this.audioBitrate = AudioPreset.speech,
+    this.audioBitrate = AudioPreset.music,
+    this.stopMicTrackOnMute = true,
   });
 
   @override

lib/src/participant/local.dart

@@ -25,6 +25,7 @@ import 'participant.dart';
 /// Represents the current participant in the room. Instance of [LocalParticipant] is automatically
 /// created after successfully connecting to a [Room] and will be accessible from [Room.localParticipant].
 class LocalParticipant extends Participant<LocalTrackPublication> {
+  bool stopMicTrackOnMute = false;
   @internal
   LocalParticipant({
     required Room room,
@@ -53,6 +54,8 @@ class LocalParticipant extends Participant<LocalTrackPublication> {
     publishOptions =
         publishOptions ?? room.roomOptions.defaultAudioPublishOptions;
 
+    stopMicTrackOnMute = publishOptions.stopMicTrackOnMute;
+
     final trackInfo = await room.engine.addTrack(
       cid: track.getCid(),
       name: track.name,
@@ -310,13 +313,24 @@ class LocalParticipant extends Participant<LocalTrackPublication> {
     logger.fine('setSourceEnabled(source: $source, enabled: $enabled)');
     final publication = getTrackPublicationBySource(source);
     if (publication != null) {
+      var track = publication.track;
+      var stopOnMute = stopMicTrackOnMute && track is LocalAudioTrack;
       if (enabled) {
         await publication.unmute();
+        if (stopOnMute) {
+          await track.restartTrack();
+          await track.onTrackStarted();
+        }
       } else {
         if (source == TrackSource.screenShareVideo) {
           await unpublishTrack(publication.sid);
         } else {
           await publication.mute();
+          if (stopOnMute) {
+            await track.sender?.setTrack(null);
+            await track.stop();
+            await track.onTrackStopped();
+          }
         }
       }
       return publication;

lib/src/track/audio_management.dart

@@ -52,6 +52,20 @@ mixin LocalAudioManagementMixin on LocalTrack, AudioTrack {
     }
     return didUpdate;
   }
+
+  Future<void> onTrackStopped() async {
+    await _trackCounterLock.synchronized(() async {
+      _localTrackCount--;
+      await _onAudioTrackCountDidChange();
+    });
+  }
+
+  Future<void> onTrackStarted() async {
+    await _trackCounterLock.synchronized(() async {
+      _localTrackCount++;
+      await _onAudioTrackCountDidChange();
+    });
+  }
 }
 mixin RemoteAudioManagementMixin on RemoteTrack, AudioTrack {
   /// Start playing audio track. On web platform, create an audio element and

lib/src/utils.dart

@@ -312,6 +312,10 @@ class Utils {
       case ConnectivityResult.ethernet:
         networkType = 'wired';
         break;
+      case ConnectivityResult.vpn:
+        //TODO: will livekit-server handle vpn types correctly?
+        //  networkType = 'vpn';
+        break;
       case ConnectivityResult.none:
         networkType = 'empty';
         break;