fix(android): wire ExoPlayer passthrough control

android/app/src/main/kotlin/com/edde746/plezy/exoplayer/ExoPlayerPlugin.kt

@@ -169,6 +169,7 @@ class ExoPlayerPlugin :
       "setVideoZoom" -> handleSetVideoZoom(call, result)
       "setDvConversionMode" -> handleSetDvConversionMode(call, result)
       "setAudioNormalization" -> handleSetAudioNormalization(call, result)
+      "setAudioPassthrough" -> handleSetAudioPassthrough(call, result)
       "observeProperty" -> handleObserveProperty(call, result)
       "setMpvProperty" -> handleSetMpvProperty(call, result)
       "setLogLevel" -> {
@@ -201,6 +202,7 @@ class ExoPlayerPlugin :
     val bufferSizeBytes = call.argument<Int>("bufferSizeBytes")
     val tunnelingEnabled = call.argument<Boolean>("tunnelingEnabled") ?: true
     val dvConversionMode = call.argument<String>("dvConversionMode") ?: "auto"
+    val audioPassthroughEnabled = call.argument<Boolean>("audioPassthroughEnabled") ?: false
     configuredBufferSizeBytes = bufferSizeBytes
 
     currentActivity.runOnUiThread {
@@ -224,7 +226,8 @@ class ExoPlayerPlugin :
         }
         val success = playerCore?.initialize(
           bufferSizeBytes = bufferSizeBytes,
-          tunnelingEnabled = tunnelingEnabled
+          tunnelingEnabled = tunnelingEnabled,
+          audioPassthroughEnabled = audioPassthroughEnabled
         ) ?: false
         if (success && playerCore?.setDebugDvConversionMode(dvConversionMode) != true) {
           Log.w(TAG, "Invalid DV conversion mode during initialize: $dvConversionMode")
@@ -647,6 +650,25 @@ class ExoPlayerPlugin :
     } ?: result.error("NO_ACTIVITY", "Activity not available", null)
   }
 
+  private fun handleSetAudioPassthrough(call: MethodCall, result: MethodChannel.Result) {
+    val enabled = call.argument<Boolean>("enabled")
+    if (enabled == null) {
+      result.error("INVALID_ARGS", "Missing 'enabled'", null)
+      return
+    }
+    val audioSpdif = if (enabled) "ac3,eac3,dts,dts-hd,truehd" else ""
+    pendingMpvProperties["audio-spdif"] = audioSpdif
+    if (usingMpvFallback) {
+      mpvCore?.setProperty("audio-spdif", audioSpdif)
+      result.success(true)
+      return
+    }
+    activity?.runOnUiThread {
+      playerCore?.setAudioPassthrough(enabled)
+      result.success(true)
+    } ?: result.error("NO_ACTIVITY", "Activity not available", null)
+  }
+
   private fun handleSetMpvProperty(call: MethodCall, result: MethodChannel.Result) {
     val name = call.argument<String>("name")
     val value = call.argument<String>("value")

lib/mpv/player/platform/player_android.dart

@@ -13,6 +13,9 @@ class PlayerAndroid extends PlayerBase {
   bool _tunnelingEnabled = true;
   String _dvConversionMode = 'auto';
   bool _audioNormalizationEnabled = false;
+  bool _audioPassthroughEnabled = false;
+
+  static const String _passthroughCodecs = 'ac3,eac3,dts,dts-hd,truehd';
 
   /// The native plugin switched from ExoPlayer to its mpv fallback for this
   /// session. Sticky for the instance lifetime, mirroring the native flag
@@ -55,6 +58,9 @@ class PlayerAndroid extends PlayerBase {
   @override
   bool get providesNativeStats => true;
 
+  @override
+  bool get audioPassthroughActive => _audioPassthroughEnabled;
+
   @override
   void handlePlayerEvent(String name, Map? data) {
     if (name == 'backend-switched') {
@@ -88,6 +94,7 @@ class PlayerAndroid extends PlayerBase {
         'bufferSizeBytes': _bufferSizeBytes,
         'tunnelingEnabled': _tunnelingEnabled,
         'dvConversionMode': _dvConversionMode,
+        'audioPassthroughEnabled': _audioPassthroughEnabled,
       });
       if (result != true) {
         throw Exception('Failed to initialize ExoPlayer');
@@ -280,6 +287,22 @@ class PlayerAndroid extends PlayerBase {
     await super.setAudioNormalization(enabled);
   }
 
+  @override
+  Future<void> setAudioPassthrough(bool enabled) async {
+    if (disposed) return;
+    _audioPassthroughEnabled = enabled;
+    final initFuture = _initFuture;
+    if (initialized) {
+      await invoke('setAudioPassthrough', {'enabled': enabled});
+    } else if (initFuture != null) {
+      await initFuture;
+      if (!disposed && initialized && _audioPassthroughEnabled == enabled) {
+        await invoke('setAudioPassthrough', {'enabled': enabled});
+      }
+    }
+    await setProperty('audio-spdif', enabled ? _passthroughCodecs : '');
+  }
+
   @override
   Future<String?> getProperty(String name) async {
     if (disposed) return null;