ability to change audio track in theora video

drivers/theora/video_stream_theora.cpp

@@ -238,6 +238,8 @@ void VideoStreamPlaybackTheora::set_file(const String& p_file) {
 	/* Ogg file open; parse the headers */
 	/* Only interested in Vorbis/Theora streams */
 	int stateflag = 0;
+
+    int audio_track_skip=audio_track;
 	while(!stateflag){
 		int ret=buffer_data();
 		if(ret==0)break;
@@ -264,8 +266,14 @@ void VideoStreamPlaybackTheora::set_file(const String& p_file) {
 				theora_p=1;
 			}else if(!vorbis_p && vorbis_synthesis_headerin(&vi,&vc,&op)>=0){
 				/* it is vorbis */
-				copymem(&vo,&test,sizeof(test));
-				vorbis_p=1;
+                if (audio_track_skip) {
+                    vorbis_info_clear(&vi);
+                    vorbis_comment_clear(&vc);
+                    audio_track_skip--;
+                } else {
+                    copymem(&vo,&test,sizeof(test));
+                    vorbis_p=1;
+                }
 			}else{
 				/* whatever it is, we don't care about it */
 				ogg_stream_clear(&test);
@@ -677,7 +685,7 @@ int VideoStreamPlaybackTheora::get_channels() const{
 
 void VideoStreamPlaybackTheora::set_audio_track(int p_idx) {
 
-
+    audio_track=p_idx;
 }
 
 int VideoStreamPlaybackTheora::get_mix_rate() const{
@@ -701,6 +709,7 @@ VideoStreamPlaybackTheora::VideoStreamPlaybackTheora() {
 	texture = Ref<ImageTexture>( memnew(ImageTexture ));
 	mix_callback=NULL;
 	mix_udata=NULL;
+    audio_track=0;
 	delay_compensation=0;
 };
 

drivers/theora/video_stream_theora.h

@@ -65,6 +65,8 @@ class VideoStreamPlaybackTheora : public VideoStreamPlayback {
 	AudioMixCallback mix_callback;
 	void* mix_udata;
 
+    int audio_track;
+
 protected:
 
 	void clear();
@@ -113,15 +115,22 @@ class VideoStreamTheora : public VideoStream {
 	OBJ_TYPE(VideoStreamTheora,VideoStream);
 
 	String file;
+    int audio_track;
+
+
 public:
 
 	Ref<VideoStreamPlayback> instance_playback() {
 		Ref<VideoStreamPlaybackTheora> pb = memnew( VideoStreamPlaybackTheora );
+        pb->set_audio_track(audio_track);
 		pb->set_file(file);
 		return pb;
 	}
 
 	void set_file(const String& p_file) { file=p_file; }
+    void set_audio_track(int p_track) { audio_track=p_track; }
+
+    VideoStreamTheora() { audio_track=0; }
 
 };
 

scene/gui/video_player.cpp

@@ -195,7 +195,12 @@ void VideoPlayer::set_stream(const Ref<VideoStream> &p_stream) {
 	stop();
 
 	stream=p_stream;
-	playback=stream->instance_playback();
+    if (stream.is_valid()) {
+        stream->set_audio_track(audio_track);
+        playback=stream->instance_playback();
+    } else {
+        playback=Ref<VideoStreamPlayback>();
+    }
 
 	if (!playback.is_null()) {
 		playback->set_loop(loops);
@@ -280,6 +285,14 @@ int VideoPlayer::get_buffering_msec() const{
 	return buffering_ms;
 }
 
+void VideoPlayer::set_audio_track(int p_track) {
+    audio_track=p_track;
+}
+
+int VideoPlayer::get_audio_track() const {
+
+    return audio_track;
+}
 
 
 void VideoPlayer::set_volume(float p_vol) {
@@ -353,6 +366,9 @@ void VideoPlayer::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("set_volume_db","db"),&VideoPlayer::set_volume_db);
 	ObjectTypeDB::bind_method(_MD("get_volume_db"),&VideoPlayer::get_volume_db);
 
+    ObjectTypeDB::bind_method(_MD("set_audio_track","track"),&VideoPlayer::set_audio_track);
+    ObjectTypeDB::bind_method(_MD("get_audio_track"),&VideoPlayer::get_audio_track);
+
 	ObjectTypeDB::bind_method(_MD("get_stream_name"),&VideoPlayer::get_stream_name);
 
 	ObjectTypeDB::bind_method(_MD("get_stream_pos"),&VideoPlayer::get_stream_pos);
@@ -371,7 +387,8 @@ void VideoPlayer::_bind_methods() {
 	ADD_PROPERTY( PropertyInfo(Variant::REAL, "stream/volume_db", PROPERTY_HINT_RANGE,"-80,24,0.01"), _SCS("set_volume_db"), _SCS("get_volume_db") );
 	ADD_PROPERTY( PropertyInfo(Variant::BOOL, "stream/autoplay"), _SCS("set_autoplay"), _SCS("has_autoplay") );
 	ADD_PROPERTY( PropertyInfo(Variant::BOOL, "stream/paused"), _SCS("set_paused"), _SCS("is_paused") );
-	ADD_PROPERTY( PropertyInfo( Variant::BOOL, "expand" ), _SCS("set_expand"),_SCS("has_expand") );
+    ADD_PROPERTY( PropertyInfo(Variant::INT, "stream/audio_track",PROPERTY_HINT_RANGE,"0,128,1"), _SCS("set_audio_track"), _SCS("get_audio_track") );
+    ADD_PROPERTY( PropertyInfo( Variant::BOOL, "expand" ), _SCS("set_expand"),_SCS("has_expand") );
 }
 
 
@@ -384,6 +401,8 @@ VideoPlayer::VideoPlayer() {
 	expand = true;
 	loops = false;
 
+    audio_track=0;
+
 	buffering_ms=500;
 	server_mix_rate=44100;
 

scene/gui/video_player.h

@@ -70,7 +70,8 @@ class VideoPlayer : public Control {
 	bool expand;
 	bool loops;
 	int buffering_ms;
-	int server_mix_rate;
+    int server_mix_rate;
+    int audio_track;
 
 	static int _audio_mix_callback(void* p_udata,const int16_t *p_data,int p_frames);
 
@@ -109,6 +110,9 @@ public:
 	void set_autoplay(bool p_vol);
 	bool has_autoplay() const;
 
+    void set_audio_track(int p_track);
+    int get_audio_track() const;
+
 	void set_buffering_msec(int p_msec);
 	int get_buffering_msec() const;
 

scene/resources/video_stream.h

@@ -82,6 +82,7 @@ class VideoStream : public Resource {
 
 public:
 
+    virtual void set_audio_track(int p_track)=0;
 	virtual Ref<VideoStreamPlayback> instance_playback()=0;
 
 	VideoStream() {}