progress on asynchronous song property loading

core/src/zero1hd/rhythmbullet/audio/Mp3Manager.java

@@ -1,6 +1,8 @@
 package zero1hd.rhythmbullet.audio;
 
 import java.io.IOException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException;
 import org.jaudiotagger.audio.exceptions.ReadOnlyFileException;
@@ -39,7 +41,12 @@ public class Mp3Manager implements MusicManager {
 	private byte[] workset;
 	private int indexHead = -1;
 	
+	private ExecutorService exec;
+	private boolean loadComplete;
+	
 	public Mp3Manager(FileHandle audioFile) {
+		exec = Executors.newSingleThreadExecutor();
+		exec.submit(() -> {
 			try {
 				MP3File mp3File = new MP3File(audioFile.file());
 				sampleCount = MathUtils.round((float) (mp3File.getAudioHeader().getSampleRateAsNumber()*mp3File.getMP3AudioHeader().getPreciseTrackLength())); 
@@ -49,6 +56,9 @@ public class Mp3Manager implements MusicManager {
 				e.printStackTrace();
 			}
 			
+			loadComplete = true;
+		});
+		
 		bitstream = new Bitstream(audioFile.read());
 		decoder = new MP3Decoder();
 		
@@ -91,6 +101,7 @@ public class Mp3Manager implements MusicManager {
 	public void dispose() {
 		playbackMusic.stop();
 		playbackMusic.dispose();
+		exec.shutdown();
 		try {
 			bitstream.close();
 		} catch (BitstreamException e) {
@@ -121,9 +132,8 @@ public class Mp3Manager implements MusicManager {
 				samples[sid] /= Short.MAX_VALUE+1;
 			}
 		}
-		if (framesRead != 0) {
 		currentReadWindowIndex++;
-		}
+
 		return framesRead;
 	}
 	
@@ -209,4 +219,9 @@ public class Mp3Manager implements MusicManager {
 	public void setVolume(float percent) {
 		playbackMusic.setVolume(percent);
 	}
+
+	@Override
+	public boolean isFinishedLoading() {
+		return loadComplete;
+	}
 }

core/src/zero1hd/rhythmbullet/audio/MusicManager.java

@@ -68,4 +68,10 @@ public interface MusicManager extends Disposable {
 	public void setOnCompletionListener(OnCompletionListener listener);
 
 	public void setVolume(float percent);
+	
+	/**
+	 * If the the properties of the song are done loading
+	 * @return whether its done loading
+	 */
+	public boolean isFinishedLoading();
 }

core/src/zero1hd/rhythmbullet/audio/WAVManager.java

@@ -19,7 +19,6 @@ public class WAVManager implements MusicManager {
 	private int currentReadWindowIndex;
 	private Music playbackMusic;
 	WavDecoder decoder;
-	
 	public WAVManager(FileHandle file) {
 		try {
 			decoder = new WavDecoder(file);
@@ -122,4 +121,9 @@ public class WAVManager implements MusicManager {
 	public void setVolume(float percent) {
 		playbackMusic.setVolume(percent);
 	}
+
+	@Override
+	public boolean isFinishedLoading() {
+		return true;
+	}
 }

core/src/zero1hd/rhythmbullet/audio/visualizer/BasicVisualizer.java

@@ -95,9 +95,9 @@ public class BasicVisualizer extends VisualizerCore {
 	}
 	
 	@Override
-	public void setMM(MusicManager mdp) {
-		super.setMM(mdp);
-		float validBins = (5000/((mdp.getSampleRate()/2)/((audioPCM.length/2)+1)));
+	public void setMM(MusicManager mm) {
+		super.setMM(mm);
+		float validBins = (5000/((mm.getSampleRate()/2)/((audioPCM.length/2)+1)));
 		Gdx.app.debug("Visualizer", "valid frequency bins " + validBins);
 		binsPerBar = MathUtils.round((validBins/barCount));
 	}

core/src/zero1hd/rhythmbullet/audio/visualizer/VisualizerCore.java

@@ -24,14 +24,12 @@ public class VisualizerCore implements Disposable {
 	public void calculate() {
 		if (mm != null) {
 			mm.playbackIndexUpdate();
-			if (mm.getPlaybackIndexPosition() > mm.getCurrentReadWindowIndex()) {
-				while (mm.getPlaybackIndexPosition() > mm.getCurrentReadWindowIndex()) {
+			while (mm.isPlaying() && mm.getPlaybackIndexPosition() > mm.getCurrentReadWindowIndex()) {
 				mm.readSamples(audioPCM);
 				fft.realForward(audioPCM);
 			}
 		}
 	}
-	}
 	
 	public void setMM(MusicManager mm) {
 		this.mm = mm;

core/src/zero1hd/rhythmbullet/graphics/ui/components/Visualizer.java

@@ -10,6 +10,8 @@ import zero1hd.rhythmbullet.audio.visualizer.BasicVisualizer;
 public class Visualizer extends Widget {
 	private BasicVisualizer vis;
 	private boolean updatePositioning = true;
+	private boolean mmSet;
+	private MusicManager mm;
 	public Visualizer() {
 		vis = new BasicVisualizer();
 	}
@@ -32,12 +34,18 @@ public class Visualizer extends Widget {
 			vis.updatePositionInfo();
 		}
 		vis.calculate();
+		
+		if (mm != null && mm.isFinishedLoading() && !mmSet) {
+			vis.setMM(mm);
+			mmSet = true;
+		}
 		super.act(delta);
 	}
 	
 	
-	public void setMDP(MusicManager mdp) {
-		vis.setMM(mdp);
+	public void setMM(MusicManager mm) {
+		this.mm = mm;
+		mmSet = false;
 	}
 	
 	@Override

core/src/zero1hd/rhythmbullet/graphics/ui/pages/MainPage.java

@@ -22,7 +22,7 @@ public class MainPage extends Page implements OnDifferentSongListener {
 		titleBar = new TitleBarVisualizer(core.getAssetManager(), camera);
 		addActor(titleBar);
 		
-		titleBar.getHvisual().setMDP(sc.getCurrentSong());
+		titleBar.getHvisual().setMM(sc.getCurrentSong());
 		
 		sc.addOnDifferentSongListener(this);
 		
@@ -44,7 +44,7 @@ public class MainPage extends Page implements OnDifferentSongListener {
 
 	@Override
 	public void onDifferentSong(MusicManager mdp) {
-		titleBar.getHvisual().setMDP(mdp);
+		titleBar.getHvisual().setMM(mdp);
 	}
 	
 	@Override