Added support for setting current audio track and getting audio track…

… count

dartvlc/api/api.cc

@@ -223,6 +223,16 @@ void PlayerTakeSnapshot(int32_t id, const char* file_path, int32_t width,
   player->TakeSnapshot(file_path, width, height);
 }
 
+void PlayerSetAudioTrack(int32_t id, int32_t track) {
+    Player* player = g_players->Get(id);
+    player->SetAudioTrack(track);
+}
+
+int32_t PlayerAudioTrackCount(int32_t id) {
+    Player* player = g_players->Get(id);
+    return player->AudioTrackCount();
+}
+
 void MediaClearMap(void*, void* peer) {
   delete reinterpret_cast<std::map<std::string, std::string>*>(peer);
 }

dartvlc/api/api.h

@@ -91,6 +91,10 @@ DLLEXPORT void PlayerMove(int32_t id, int32_t initial_index,
 DLLEXPORT void PlayerTakeSnapshot(int32_t id, const char* file_path,
                                   int32_t width, int32_t height);
 
+DLLEXPORT void PlayerSetAudioTrack(int32_t id, int32_t track);
+
+DLLEXPORT int32_t PlayerAudioTrackCount(int32_t id);                                  
+
 DLLEXPORT const char** MediaParse(Dart_Handle object, const char* type,
                                   const char* resource, int32_t timeout);
 

dartvlc/internal/setters.h

@@ -220,4 +220,12 @@ class PlayerSetters : public PlayerEvents {
   void SetVideoHeight(int32_t video_height) {
     preferred_video_height_ = video_height;
   }
+
+  void SetAudioTrack(int32_t track) {
+    vlc_media_player_.setAudioTrack(track);
+  }
+
+  int32_t AudioTrackCount() {
+    return vlc_media_player_.audioTrackCount();
+  }
 };

ffi/lib/src/internal/ffi.dart

@@ -104,6 +104,14 @@ abstract class PlayerFFI {
   static final PlayerTakeSnapshotDart takeSnapshot = dynamicLibrary
       .lookup<NativeFunction<PlayerTakeSnapshotCXX>>('PlayerTakeSnapshot')
       .asFunction();
+
+  static final PlayerSetAudioTrackDart setAudioTrack = dynamicLibrary
+    .lookup<NativeFunction<PlayerSetAudioTrackCXX>>('PlayerSetAudioTrack')
+    .asFunction();
+
+  static final PlayerAudioTrackCountDart audioTrackCount = dynamicLibrary
+    .lookup<NativeFunction<PlayerAudioTrackCountCXX>>('PlayerAudioTrackCount')
+    .asFunction();
 }
 
 abstract class MediaFFI {

ffi/lib/src/internal/typedefs/player.dart

@@ -58,3 +58,7 @@ typedef PlayerTakeSnapshotCXX = Void Function(
     Int32 id, Pointer<Utf8> filePath, Int32 width, Int32 height);
 typedef PlayerTakeSnapshotDart = void Function(
     int id, Pointer<Utf8> filePath, int width, int height);
+typedef PlayerSetAudioTrackCXX = Void Function(Int32 id, Int32 index);
+typedef PlayerSetAudioTrackDart = void Function(int id, int index);
+typedef PlayerAudioTrackCountCXX = Int32 Function(Int32 id);
+typedef PlayerAudioTrackCountDart = int Function(int id);

ffi/lib/src/player.dart

@@ -340,6 +340,19 @@ class Player {
     );
   }
 
+  /// Sets Current Audio Track for the current [MediaSource]
+  void setAudioTrack(int track) {
+    return PlayerFFI.setAudioTrack(this.id, track);
+  }
+
+  /// Gets audio track count from current [MediaSource]
+  int audioTrackCount() {
+    int count = PlayerFFI.audioTrackCount(this.id);
+    // for some reason this value returns 0 when no tracks exists
+    // and 2 or more if there's 1 or more audio tracks for this [MediaSource].
+    return count > 1 ? count - 1 : count;
+  }
+
   /// Destroys the instance of [Player] & closes all [StreamController]s in it.
   void dispose() {
     this.currentController.close();