Add `VideoSource::useHDMIForAudio flag` to be used before init

src/Sources/OMXPlayerCache.cpp

@@ -18,7 +18,7 @@ ofxOMXPlayer * OMXPlayerCache::load(string moviePath){
 	if(_players.find(moviePath) == _players.end()){
 		ofxOMXPlayerSettings settings;
 		settings.videoPath = moviePath;
-		settings.useHDMIForAudio = true;
+		settings.useHDMIForAudio = VideoSource::useHDMIForAudio;
 		settings.enableTexture = true;
 		settings.enableLooping = true;
 		settings.enableAudio = VideoSource::enableAudio;

src/Sources/VideoSource.cpp

@@ -4,6 +4,7 @@ namespace ofx {
 namespace piMapper {
 
 bool VideoSource::enableAudio = false;
+bool VideoSource::useHDMIForAudio = false;
 
 VideoSource::VideoSource(){
 	loadable = true;

src/Sources/VideoSource.h

@@ -18,6 +18,7 @@ class VideoSource : public BaseSource {
 		// TODO: Create enableAudio() and disableAudio() methods
 		//       for live audio enabling and disabling.
 		static bool enableAudio;
+		static bool useHDMIForAudio;
 
 		VideoSource();
 		~VideoSource();