Aggiunge il mute del microfono in diretta per evitare claim YouTube sulla musica in palestra.

Co-authored-by: Cursor <cursoragent@cursor.com>

native/ios/MatchLiveTv/Streaming/LiveBroadcastEngine.swift

@@ -47,6 +47,7 @@ final class LiveBroadcastEngine: ObservableObject {
     private var lastAppliedCaptureOrientation: AVCaptureVideoOrientation?
     private var orientationDebounceTask: Task<Void, Never>?
     private var rtmpSession: (any Session)?
+    private var audioMuted = false
     private static var rtmpFactoryRegistered = false
 
     private static func ensureRTMPFactoryRegistered() async {
@@ -173,12 +174,21 @@ final class LiveBroadcastEngine: ObservableObject {
         overlayRenderer.detach()
         try? await mixer.stopRunning()
         pipelineConfigured = false
+        audioMuted = false
     }
 
     func release() async {
         await stopBroadcast()
     }
 
+    /// Silenzia il microfono senza togliere la traccia AAC (YouTube/MediaMTX richiedono audio continuo).
+    func setAudioMuted(_ muted: Bool) async {
+        audioMuted = muted
+        await applyAudioMute()
+        metrics.audioMuted = muted
+        emitMetrics()
+    }
+
     /// Adattamento termico: aggiorna profilo video senza interrompere la sessione RTMP attiva.
     func applyThermalProfile(videoBitrate: Int, fps: Int) async {
         guard var current = config else { return }
@@ -219,7 +229,8 @@ final class LiveBroadcastEngine: ObservableObject {
             AudioMixerSettings(
                 sampleRate: BroadcastConfig.audioSampleRateHz,
                 channels: BroadcastConfig.audioChannels,
-                tracks: [0: AudioMixerTrackSettings(downmix: true, channelMap: [0])]
+                isMuted: audioMuted,
+                tracks: [0: AudioMixerTrackSettings(isMuted: audioMuted, downmix: true, channelMap: [0])]
             )
         )
         if let camera = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back) {
@@ -324,7 +335,8 @@ final class LiveBroadcastEngine: ObservableObject {
                     bitrateKbps: kbps,
                     fps: self.config?.fps ?? self.metrics.fps,
                     connected: self.phase == .live,
-                    lastError: self.metrics.lastError
+                    lastError: self.metrics.lastError,
+                    audioMuted: self.audioMuted
                 )
                 self.metricsListener?(self.metrics)
             }
@@ -496,6 +508,16 @@ final class LiveBroadcastEngine: ObservableObject {
         UIDevice.current.endGeneratingDeviceOrientationNotifications()
     }
 
+    private func applyAudioMute() async {
+        guard pipelineConfigured else { return }
+        var settings = await mixer.audioMixerSettings
+        settings.isMuted = audioMuted
+        var track = settings.tracks[0] ?? AudioMixerTrackSettings(downmix: true, channelMap: [0])
+        track.isMuted = audioMuted
+        settings.tracks[0] = track
+        try? await mixer.setAudioMixerSettings(settings)
+    }
+
     private func setPhase(_ newPhase: BroadcastPhase, error: String? = nil) {
         phase = newPhase
         metrics = BroadcastMetrics(
@@ -503,7 +525,8 @@ final class LiveBroadcastEngine: ObservableObject {
             bitrateKbps: metrics.bitrateKbps,
             fps: config?.fps ?? metrics.fps,
             connected: newPhase == .live,
-            lastError: error
+            lastError: error,
+            audioMuted: audioMuted
         )
         metricsListener?(metrics)
     }