Finished basic visualizer and mass refactoring on the audio analyzer to

be compatible with the structure

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

@@ -8,25 +8,31 @@ import org.jaudiotagger.audio.AudioHeader;
 import org.jaudiotagger.audio.exceptions.CannotReadException;
 import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException;
 import org.jaudiotagger.audio.exceptions.ReadOnlyFileException;
+import org.jaudiotagger.audio.mp3.MP3AudioHeader;
+import org.jaudiotagger.audio.mp3.MP3File;
 import org.jaudiotagger.tag.TagException;
 
 import com.badlogic.gdx.files.FileHandle;
 
 public class MinimalAudioHeader {
 	private int sampleRate, channelCount;
-	
+	private SupportedFormats format;
+	private FileHandle musicFile;
 	public MinimalAudioHeader(FileHandle musicFile) {
+		this.musicFile = musicFile;
+		format = SupportedFormats.valueOf(musicFile.extension().toUpperCase());
 		try {
 			AudioFile file = AudioFileIO.read(musicFile.file());
 			AudioHeader header = file.getAudioHeader();
 			sampleRate = header.getSampleRateAsNumber();
 			channelCount = (header.getChannels().equals("Mono") ? 1 : 2);
-		} catch (CannotReadException | IOException | TagException | ReadOnlyFileException
+		} catch (CannotReadException | IOException | TagException | ReadOnlyFileException | InvalidAudioFrameException e) {
-				| InvalidAudioFrameException e) {
 			e.printStackTrace();
 		}
 	}
 	
+	
+	
 	public int getSampleRate() {
 		return sampleRate;
 	}
@@ -34,4 +40,21 @@ public class MinimalAudioHeader {
 	public int getChannelCount() {
 		return channelCount;
 	}
+	
+	
+	public long estimateSampleFrames() {
+		switch (format) {
+		case MP3:
+			try {
+				MP3File file = (MP3File) AudioFileIO.read(musicFile.file());
+				MP3AudioHeader header = file.getMP3AudioHeader();
+				return header.getNumberOfFrames();
+			} catch (CannotReadException | IOException | TagException | ReadOnlyFileException | InvalidAudioFrameException e) {
+				e.printStackTrace();
+			}
+			return -1;
+		default:
+			return -1;
+		}
+	}
 }

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

@@ -177,7 +177,7 @@ public class MusicController extends Observable implements OnCompletionListener,
 		if (musicHeader != null) {
 			return musicHeader;
 		} else {
-			return musicList.newMinimalAudioHeader(getCurrentMusicFileHandle());
+			return musicHeader = musicList.newMinimalAudioHeader(getCurrentMusicFileHandle());
 		}
 	}
 	

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

@@ -41,13 +41,16 @@ public class MusicList extends Observable {
 	
 	/**
 	 * @param file
-	 * @return a {@link #zero1hd.rhythmbullet.audio.processor.AudioProcessor()} of the given music file. Will return null if theres a format error.
+	 * @return a {@link AudioProcessor} of the given music file. Will return null if theres a format error.
 	 */
 	public AudioProcessor newAudioProcessor(FileHandle file) {
-		if (file.extension().equalsIgnoreCase("wav")) {
+		switch (SupportedFormats.valueOf(file.extension().toUpperCase())) {
-			return new WAVAudioProcessor(file);
+		case MP3:
-		} else if (file.extension().equalsIgnoreCase("mp3")) {
 			return audioProcFactory.newMP3AudioProcessor(file);
+		case WAV:
+			return new WAVAudioProcessor(file);
+		default:
+			break;
 		}
 		return null;
 	}
@@ -124,8 +127,11 @@ public class MusicList extends Observable {
 				if (files[i].isDirectory()) {
 					musicFiles.addAll(recursiveMusicSearch(files[i]));
 				} else {
-					if (files[i].extension().equalsIgnoreCase("wav") || files[i].extension().equalsIgnoreCase("mp3")) {
+					try {
+						SupportedFormats.valueOf(files[i].extension().toUpperCase());
 						musicFiles.add(files[i]);
+					} catch (IllegalArgumentException e) {
+						Gdx.app.log("MusicList", "Unsupported file format: " + files[i].name());
 					}
 				}
 			}

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

@@ -77,10 +77,16 @@ public class MusicMetadataController implements Disposable, Observer {
 			for (int i = 0; i < musicList.getTotal(); i++) {
 				FileHandle musicFile = musicList.getMusicArray().get(i);
 				synchronized (this) {
-					if (musicFile.extension().equalsIgnoreCase("wav")) {
+					switch (SupportedFormats.valueOf(musicFile.extension().toUpperCase())) {
-						metadataArray.add(new WAVMetadata(musicFile));
+					case MP3:
-					} else if (musicFile.extension().equalsIgnoreCase("mp3")) {
 						metadataArray.add(new MP3Metadata(musicFile));
+						break;
+					case WAV:
+						metadataArray.add(new WAVMetadata(musicFile));
+						break;
+					default:
+						break;
+					
 					}
 				}
 			}

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

@@ -0,0 +1,5 @@
+package zero1hd.rhythmbullet.audio;
+
+public enum SupportedFormats {
+	WAV, MP3;
+}

core/src/zero1hd/rhythmbullet/audio/analyzer/AudioAnalyzer.java

@@ -1,53 +1,296 @@
 package zero1hd.rhythmbullet.audio.analyzer;
 
-import java.util.concurrent.ExecutorService;
+import com.badlogic.gdx.Gdx;
-import java.util.concurrent.Executors;
+import com.badlogic.gdx.math.MathUtils;
-
 import com.badlogic.gdx.utils.Disposable;
+import com.badlogic.gdx.utils.FloatArray;
 
-import zero1hd.rhythmbullet.audio.MusicManager;
+import edu.emory.mathcs.jtransforms.fft.FloatFFT_1D;
+import zero1hd.rhythmbullet.audio.processor.AudioProcessor;
 
-public class AudioAnalyzer implements Disposable {
+public class AudioAnalyzer implements Runnable, Disposable {
-	private ExecutorService exec;
+	private Thread thread;
+	private String threadName = "Audio-Analyzer";
 	
-	private SpectralFluxAnalysisRunnable sfar;
+	private volatile boolean work = true;
-	private ThresholdCalcRunnable tcr;
+	private int windowSize = 1024;
-	private PruneFluxRunnable pfr;
-	private PeakDetectionRunnable pdr;
 	
-	public AudioAnalyzer(MusicManager musicManager) {
+	private FloatArray bassSpectralFlux = new FloatArray();
-		exec = Executors.newSingleThreadExecutor();
+	private FloatArray mSpectralFlux = new FloatArray();
-		sfar = new SpectralFluxAnalysisRunnable(musicManager);
+	private FloatArray umSpectralFlux = new FloatArray();
-		tcr = new ThresholdCalcRunnable(sfar);
-		pfr = new PruneFluxRunnable(tcr);
-		pdr = new PeakDetectionRunnable(pfr, sfar.getPUID());
 
+	private FloatArray bassThreshold = new FloatArray();
+	private FloatArray mThreshold = new FloatArray();
+	private FloatArray umThreshold = new FloatArray();
+	
+	private FloatArray bassPrunned = new FloatArray();
+	private FloatArray mPrunned = new FloatArray();
+	private FloatArray umPrunned = new FloatArray();
+	
+	private FloatArray bassPeaks = new FloatArray();
+	private FloatArray mPeaks = new FloatArray();
+	private FloatArray umPeaks = new FloatArray();
+	
+	private float bassMaxValue, mMaxValue, umMaxValue, secondsPerWindow, mAvg, bassAvg, umAvg;
+	
+	AudioProcessor processor;
+	
+	private int PUID;
+	private int progress;
+	
+	public AudioAnalyzer(AudioProcessor audioProcessor) {
+		this.processor = audioProcessor;
 	}
 	
 	public void start() {
-		exec.submit(sfar);
+		if (thread == null || !thread.isAlive()) {
-		exec.submit(tcr);
+			work = true;
-		exec.submit(pfr);
+			thread = new Thread(this, threadName);
-		exec.submit(pdr);
+			thread.start();
+		}
 	}
 	
-	private void stop() {
+	@Override
-		sfar.work = false;
+	public void run() {
-		tcr.work = false;
+		spectralFluxAnalysis();
-		pfr.work = false;
+		thresholdCalculation();
-		pdr.work = false;
+		pruneFluxValues();
+		peakDetection();
+	}
+	
+	private void spectralFluxAnalysis() {
+		progress = 0;
+		int tasksDone = 0;
+		long totalTasks = MathUtils.round((float)processor.getSampleFrames()/windowSize);
+		
+		float[] audioPCM = new float[windowSize];
+		float[] spectrum = new float[(windowSize/2)+1];
+		float[] lastSpectrum = new float[(windowSize/2)+1];
+		
+		int bassBinBegin = 1;
+		int bassBinEnd = 11;
+		
+		int mBinBegin = 50;
+		int mBinEnd = 250;
+		
+		int umBinBegin = 350;
+		int umBinEnd = 513;
+		
+		Gdx.app.debug("Read freq", String.valueOf(processor.getSampleRate()));
+		Gdx.app.debug("Using following bin ranges", "\nBass freq begin: " + bassBinBegin + "\nBass freq end: " + bassBinEnd + "\nMain freq begin: " + umBinBegin + "\nMain freq end: " + umBinEnd);
+
+		Gdx.app.debug("Total tasks", String.valueOf(totalTasks));
+		
+		FloatFFT_1D fft = new FloatFFT_1D(windowSize);
+		int seedDigit = 0;
+		
+		while (processor.readFrames(audioPCM) > 0 && work) {
+			
+			fft.realForward(audioPCM);
+			
+			//Building a PUID (Pseudo unique ID)
+			if (tasksDone == (seedDigit*totalTasks/9)) {
+				float avg = 0;
+				for (int frame = 0; frame < spectrum.length; frame++) {
+					avg += spectrum[frame];
+				}
+				avg /= spectrum.length;
+				if (avg < 0) {
+					avg *= -1f;
+				}
+				PUID +=(int) Math.pow(10, 9-seedDigit) * ((int)(avg*1000f)-(int)(avg*100f)*10);
+				seedDigit ++;
+			}
+			
+			System.arraycopy(spectrum, 0, lastSpectrum, 0, spectrum.length);
+			System.arraycopy(audioPCM, 0, spectrum, 0, spectrum.length);
+			
+			float fluxVal;
+			//bass detection
+			fluxVal = 0;
+			for (int i = bassBinBegin; i < bassBinEnd; i++) {
+				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
+						? 0 : (spectrum[i] - lastSpectrum[i]);
+			}
+			bassSpectralFlux.add(fluxVal);
+			
+			//m detection
+			fluxVal = 0;
+			for (int i = mBinBegin; i < mBinEnd; i++) {
+				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
+						? 0 : (spectrum[i] - lastSpectrum[i]);
+			}
+			mSpectralFlux.add(fluxVal);
+			
+			//um detection
+			fluxVal = 0;
+			for (int i = umBinBegin; i < umBinEnd; i++) {
+				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
+						? 0 : (spectrum[i] - lastSpectrum[i]);
+			}
+			umSpectralFlux.add(fluxVal);
+			tasksDone++;
+			progress = (int) (100f*tasksDone/totalTasks);
+		}
+		
+		if (work) {
+			Gdx.app.debug("Audio Analyzer", "Done getting spectral flux.");
+			Gdx.app.debug("Audio Analyzer", "window count: " + bassSpectralFlux.size);
+			Gdx.app.debug("Audio Analyzer", "USING SEED: " + PUID);
+			progress = 100;
+		}
+	}
+	
+	private void thresholdCalculation() {
+		Gdx.app.debug("Audio Analyzer", "beginning threshold calc.");
+
+		float bassThresholdMultiplier = 1.5f;
+		float mThresholdMultiplier = 1.4f;
+		float umThresholdMultiplier = 1.4f;
+		
+		int bassThresholdCalcRange = (int) (0.27/(windowSize/processor.getSampleRate()));
+		int mThresholdCalcRange = (int) (0.4/(windowSize/processor.getSampleRate()));
+		int umThresholdCalcRange = (int) (0.4/(windowSize/processor.getSampleRate()));
+		//threshold calculation
+		for (int i = 0; i < umSpectralFlux.size && work; i++) {
+			int start = Math.max(0, i - bassThresholdCalcRange/2);
+			int end = Math.min(umSpectralFlux.size - 1, i + bassThresholdCalcRange/2);
+			float average = 0;
+			for (int j = start; j <= end; j++) {
+				average += bassSpectralFlux.get(j);
+			}
+			average /= (end - start);
+			bassThreshold.add(average * bassThresholdMultiplier);
+			
+			start = Math.max(0, i - mThresholdCalcRange/2);
+			end = Math.min(umSpectralFlux.size - 1, i + mThresholdCalcRange/2);
+			average = 0;
+			for (int j = start; j <= end; j++) {
+				average+= mSpectralFlux.get(j);
+			}
+			average /= (end - start);
+			mThreshold.add(average*mThresholdMultiplier);
+			
+			start = Math.max(0, i - umThresholdCalcRange/2);
+			end = Math.min(umSpectralFlux.size - 1, i + umThresholdCalcRange/2);
+			average = 0;
+			for (int j = start; j <= end; j++) {
+				average+= umSpectralFlux.get(j);
+			}
+			average /= (end - start);
+			umThreshold.add(average*umThresholdMultiplier);
+		}
+		Gdx.app.debug("Audio Analyzer", "Threshold calculated.");
+	}
+	
+	private void pruneFluxValues() {
+		//pruning data
+		float prunnedCurrentVal;
+
+		for (int i = 0; i < umSpectralFlux.size && work; i++) {
+			prunnedCurrentVal = bassSpectralFlux.get(i) - bassThreshold.get(i);
+			if (prunnedCurrentVal >= 0) {
+				bassPrunned.add(prunnedCurrentVal);
+			} else {
+				bassPrunned.add(0);
+			}
+			
+			prunnedCurrentVal = mSpectralFlux.get(i) - mThreshold.get(i);
+			if (prunnedCurrentVal >= 0 ) {
+				mPrunned.add(prunnedCurrentVal);
+			} else {
+				mPrunned.add(0);
+			}
+			
+			prunnedCurrentVal = umSpectralFlux.get(i) - umThreshold.get(i);
+			if (prunnedCurrentVal >= 0 ) {
+				umPrunned.add(prunnedCurrentVal);
+			} else {
+				umPrunned.add(0);
+			}
+		}
+		Gdx.app.debug("Audio Analyzer", "Data prunned.");
+	}
+	
+	private void peakDetection() {
+		int lastBeatID = 0;
+		float bassBeats = 0;
+		float mBeats = 0;
+		float umBeats = 0;
+		float avgSPB = -1f;
+
+		for (int i = 0; i < umPrunned.size-1 && work; i++) {
+			bassPeaks.add((bassPrunned.get(i) > bassPrunned.get(i+1) ? bassPrunned.get(i) : 0f));
+			if (bassPeaks.get(i) > bassMaxValue) {
+				bassMaxValue = bassPeaks.get(i);
+			}
+			
+			mPeaks.add((mPrunned.get(i) > mPrunned.get(i+1) ? mPrunned.get(i) : 0f));
+			if (mPeaks.get(i) > mMaxValue) {
+				mMaxValue = mPeaks.get(i);
+			}
+			
+			umPeaks.add((umPrunned.get(i) > umPrunned.get(i+1) ? umPrunned.get(i) : 0f));
+			if (umPeaks.get(i) > umMaxValue) {
+				umMaxValue = umPeaks.get(i);
+			}
+			
+
+			if (avgSPB != -1) {
+				if (bassPeaks.get(i) == 0) {
+					avgSPB ++;
+				} else {
+					lastBeatID = i;
+				}
+			} else if (bassPeaks.get(i) != 0) {
+				avgSPB = 0;
+			}
+
+			if (bassPeaks.get(i) != 0) {
+				bassAvg += bassPeaks.get(i);
+				bassBeats++;
+			}
+			
+			if (mPeaks.get(i) != 0) {
+				mAvg += mPeaks.get(i);
+				mBeats++;
+			}
+			
+			if (umPeaks.get(i) != 0) {
+				umAvg += umPeaks.get(i);
+				umBeats++;
+			}
+		}
+		
+		secondsPerWindow = windowSize/processor.getSampleRate();
+
+		//then we minus one from the beats so it actually works out
+		avgSPB -= bassPrunned.size-lastBeatID;
+		avgSPB *= secondsPerWindow;
+		avgSPB /= bassBeats;
+		Gdx.app.debug("Audio Analyzer", "Avg SPB: " + avgSPB);
+
+		bassAvg /= bassBeats;
+		mAvg /= mBeats;
+		umAvg /= umBeats;
+		Gdx.app.debug("Audio Analyzer", "Avg bass: " + bassAvg);
+		Gdx.app.debug("Audio Analyzer", "Avg M: " + mAvg);
+		Gdx.app.debug("Audio Analyzer", "Avg UM: " + umAvg);
+		
+	}
+	
+	public int getProgress() {
+		return progress;
 	}
 
 	@Override
 	public void dispose() {
-		stop();
+		if (thread != null) {
-		exec.shutdown();
+			work = false;
+		}
 	}
 	
-	public boolean isDone() {
+	public void stop() {
-		if ((sfar.isDone() && tcr.isDone() && pfr.isDone() && pdr.isDone())) {
+		work = false;
-			return true;
-		}
-		return false;
 	}
 }

core/src/zero1hd/rhythmbullet/audio/analyzer/PeakDetectionRunnable.java

@@ -1,125 +0,0 @@
-package zero1hd.rhythmbullet.audio.analyzer;
-
-import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.utils.FloatArray;
-
-import zero1hd.rhythmbullet.audio.AudioDataPackage;
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public class PeakDetectionRunnable implements Runnable {
-	boolean work = true, done;
-	private FloatArray bassPrunned;
-	private FloatArray mPrunned;
-	private FloatArray umPrunned;
-	private FloatArray bassPeaks = new FloatArray();
-	private FloatArray mPeaks = new FloatArray();
-	private FloatArray umPeaks = new FloatArray();
-	private float bassMaxValue;
-	private float mMaxValue;
-	private float umMaxValue;
-	private float secondsPerWindow;
-	private float mAvg;
-	private float bassAvg;
-	private float umAvg;
-	private MusicManager musicManager;
-	private AudioDataPackage pack;
-	private int PUID;
-	
-	public PeakDetectionRunnable(PruneFluxRunnable pfr, int PUID) {
-		bassPrunned = pfr.getBassPrunned();
-		mPrunned = pfr.getmPrunned();
-		umPrunned = pfr.getUmPrunned();
-		musicManager = pfr.getMusicManager();
-		this.PUID = PUID;
-	}
-	
-	@Override
-	public void run() {
-		int lastBeatID = 0;
-		float bassBeats = 0;
-		float mBeats = 0;
-		float umBeats = 0;
-		float avgSPB = -1f;
-
-		for (int i = 0; i < umPrunned.size-1 && work; i++) {
-			bassPeaks.add((bassPrunned.get(i) > bassPrunned.get(i+1) ? bassPrunned.get(i) : 0f));
-			if (bassPeaks.get(i) > bassMaxValue) {
-				bassMaxValue = bassPeaks.get(i);
-			}
-			
-			mPeaks.add((mPrunned.get(i) > mPrunned.get(i+1) ? mPrunned.get(i) : 0f));
-			if (mPeaks.get(i) > mMaxValue) {
-				mMaxValue = mPeaks.get(i);
-			}
-			
-			umPeaks.add((umPrunned.get(i) > umPrunned.get(i+1) ? umPrunned.get(i) : 0f));
-			if (umPeaks.get(i) > umMaxValue) {
-				umMaxValue = umPeaks.get(i);
-			}
-			
-
-			if (avgSPB != -1) {
-				if (bassPeaks.get(i) == 0) {
-					avgSPB ++;
-				} else {
-					lastBeatID = i;
-				}
-			} else if (bassPeaks.get(i) != 0) {
-				avgSPB = 0;
-			}
-
-			if (bassPeaks.get(i) != 0) {
-				bassAvg += bassPeaks.get(i);
-				bassBeats++;
-			}
-			
-			if (mPeaks.get(i) != 0) {
-				mAvg += mPeaks.get(i);
-				mBeats++;
-			}
-			
-			if (umPeaks.get(i) != 0) {
-				umAvg += umPeaks.get(i);
-				umBeats++;
-			}
-		}
-		
-		secondsPerWindow = musicManager.getReadWindowSize()/musicManager.getSampleRate();
-
-		//then we minus one from the beats so it actually works out
-		avgSPB -= bassPrunned.size-lastBeatID;
-		avgSPB *= secondsPerWindow;
-		avgSPB /= bassBeats;
-		Gdx.app.debug("Audio Analyzer", "Avg SPB: " + avgSPB);
-
-		bassAvg /= bassBeats;
-		mAvg /= mBeats;
-		umAvg /= umBeats;
-		Gdx.app.debug("Audio Analyzer", "Avg bass: " + bassAvg);
-		Gdx.app.debug("Audio Analyzer", "Avg M: " + mAvg);
-		Gdx.app.debug("Audio Analyzer", "Avg UM: " + umAvg);
-		
-		pack = new AudioDataPackage();
-		pack.setBassData(bassPeaks, bassMaxValue, bassAvg);
-		pack.setmData(mPeaks, mMaxValue, mAvg);
-		pack.setUmData(umPeaks, umMaxValue, umAvg);
-		
-		pack.setPUID(PUID);
-		pack.setAvgSPB(avgSPB);
-		pack.setSecPerWin(secondsPerWindow);
-		pack.setMusicInfo(musicManager);
-		if (work) {
-			Gdx.app.debug("Audio Analyzer", "Peak detection complete. Data ready for map gen.");
-		}
-		
-		done = true;
-	}
-	
-	public AudioDataPackage getPack() {
-		return pack;
-	}
-	
-	public boolean isDone() {
-		return done;
-	}
-}

core/src/zero1hd/rhythmbullet/audio/analyzer/PruneFluxRunnable.java

@@ -1,96 +0,0 @@
-package zero1hd.rhythmbullet.audio.analyzer;
-
-import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.utils.FloatArray;
-
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public class PruneFluxRunnable implements Runnable {
-	boolean work = true;
-	private boolean done;
-	private FloatArray bassSpectralFlux;
-	private FloatArray mSpectralFlux;
-	private FloatArray umSpectralFlux;
-	private FloatArray bassThreshold, mThreshold, umThreshold;
-	private FloatArray bassPrunned = new FloatArray();
-	private FloatArray mPrunned = new FloatArray();
-	private FloatArray umPrunned = new FloatArray();
-	private MusicManager musicManager;
-	public PruneFluxRunnable(ThresholdCalcRunnable tcr) {
-		bassSpectralFlux = tcr.getBassSpectralFlux();
-		mSpectralFlux = tcr.getmSpectralFlux();
-		umSpectralFlux = tcr.getUmSpectralFlux();
-		
-		bassThreshold = tcr.getBassThreshold();
-		umThreshold = tcr.getUmThreshold();
-		mThreshold = tcr.getmThreshold();
-		
-		this.musicManager = tcr.getMusicManager();
-	}
-	
-	@Override
-	public void run() {
-		//pruning data
-		float prunnedCurrentVal;
-
-		for (int i = 0; i < umSpectralFlux.size && work; i++) {
-			prunnedCurrentVal = bassSpectralFlux.get(i) - bassThreshold.get(i);
-			if (prunnedCurrentVal >= 0) {
-				bassPrunned.add(prunnedCurrentVal);
-			} else {
-				bassPrunned.add(0);
-			}
-			
-			prunnedCurrentVal = mSpectralFlux.get(i) - mThreshold.get(i);
-			if (prunnedCurrentVal >= 0 ) {
-				mPrunned.add(prunnedCurrentVal);
-			} else {
-				mPrunned.add(0);
-			}
-			
-			prunnedCurrentVal = umSpectralFlux.get(i) - umThreshold.get(i);
-			if (prunnedCurrentVal >= 0 ) {
-				umPrunned.add(prunnedCurrentVal);
-			} else {
-				umPrunned.add(0);
-			}
-		}
-		done = true;
-		Gdx.app.debug("Audio Analyzer", "Data prunned.");
-	}
-	
-	public FloatArray getBassSpectralFlux() {
-		return bassSpectralFlux;
-	}
-	public FloatArray getmSpectralFlux() {
-		return mSpectralFlux;
-	}
-	public FloatArray getBassThreshold() {
-		return bassThreshold;
-	}
-	public FloatArray getmThreshold() {
-		return mThreshold;
-	}
-	public FloatArray getUmSpectralFlux() {
-		return umSpectralFlux;
-	}
-	public FloatArray getUmThreshold() {
-		return umThreshold;
-	}
-	public FloatArray getBassPrunned() {
-		return bassPrunned;
-	}
-	public FloatArray getmPrunned() {
-		return mPrunned;
-	}
-	public FloatArray getUmPrunned() {
-		return umPrunned;
-	}
-	public boolean isDone() {
-		return done;
-	}
-	
-	public MusicManager getMusicManager() {
-		return musicManager;
-	}
-}

core/src/zero1hd/rhythmbullet/audio/analyzer/SpectralFluxAnalysisRunnable.java

@@ -1,141 +0,0 @@
-package zero1hd.rhythmbullet.audio.analyzer;
-
-import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.math.MathUtils;
-import com.badlogic.gdx.utils.FloatArray;
-
-import edu.emory.mathcs.jtransforms.fft.FloatFFT_1D;
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public class SpectralFluxAnalysisRunnable implements Runnable {
-	boolean work = true;
-	private boolean done;
-
-	private FloatArray bassSpectralFlux = new FloatArray();
-	private FloatArray mSpectralFlux = new FloatArray();
-	private FloatArray umSpectralFlux = new FloatArray();
-
-	
-	MusicManager musicManager;
-
-	private int PUID;
-	private int progress;
-	
-	public SpectralFluxAnalysisRunnable(MusicManager mm) {
-		this.musicManager = mm;
-	}
-	
-	@Override
-	public void run() {
-		progress = 0;
-		int tasksDone = 0;
-		long totalTasks = MathUtils.round((float)musicManager.getSampleCount()/musicManager.getChannelCount()/musicManager.getReadWindowSize());
-		
-		float[] audioPCM = new float[musicManager.getReadWindowSize()];
-		float[] spectrum = new float[(musicManager.getReadWindowSize()/2)+1];
-		float[] lastSpectrum = new float[(musicManager.getReadWindowSize()/2)+1];
-		
-		int bassBinBegin = 1;
-		int bassBinEnd = 11;
-		
-		int mBinBegin = 50;
-		int mBinEnd = 250;
-		
-		int umBinBegin = 350;
-		int umBinEnd = 513;
-		
-		Gdx.app.debug("Analyzing Song", musicManager.getBasicSongName());
-		Gdx.app.debug("Read freq", String.valueOf(musicManager.getSampleRate()));
-		Gdx.app.debug("Using following bin ranges", "\nBass freq begin: " + bassBinBegin + "\nBass freq end: " + bassBinEnd + "\nMain freq begin: " + umBinBegin + "\nMain freq end: " + umBinEnd);
-
-		Gdx.app.debug("Total tasks", String.valueOf(totalTasks));
-		
-		FloatFFT_1D fft = new FloatFFT_1D(musicManager.getReadWindowSize());
-		int seedDigit = 0;
-		
-		while (musicManager.readSampleFrames(audioPCM) > 0 && work) {
-			
-			fft.realForward(audioPCM);
-			
-			//Building a PUID (Pseudo unique ID)
-			if (tasksDone == (seedDigit*totalTasks/9)) {
-				float avg = 0;
-				for (int frame = 0; frame < spectrum.length; frame++) {
-					avg += spectrum[frame];
-				}
-				avg /= spectrum.length;
-				if (avg < 0) {
-					avg *= -1f;
-				}
-				PUID +=(int) Math.pow(10, 9-seedDigit) * ((int)(avg*1000f)-(int)(avg*100f)*10);
-				seedDigit ++;
-			}
-			
-			System.arraycopy(spectrum, 0, lastSpectrum, 0, spectrum.length);
-			System.arraycopy(audioPCM, 0, spectrum, 0, spectrum.length);
-			
-			float fluxVal;
-			//bass detection
-			fluxVal = 0;
-			for (int i = bassBinBegin; i < bassBinEnd; i++) {
-				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
-						? 0 : (spectrum[i] - lastSpectrum[i]);
-			}
-			bassSpectralFlux.add(fluxVal);
-			
-			//m detection
-			fluxVal = 0;
-			for (int i = mBinBegin; i < mBinEnd; i++) {
-				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
-						? 0 : (spectrum[i] - lastSpectrum[i]);
-			}
-			mSpectralFlux.add(fluxVal);
-			
-			//um detection
-			fluxVal = 0;
-			for (int i = umBinBegin; i < umBinEnd; i++) {
-				fluxVal += ((spectrum[i] - lastSpectrum[i])) < 0
-						? 0 : (spectrum[i] - lastSpectrum[i]);
-			}
-			umSpectralFlux.add(fluxVal);
-			tasksDone++;
-			progress = (int) (100f*tasksDone/totalTasks);
-		}
-		
-		if (work) {
-			Gdx.app.debug("Audio Analyzer", "Done getting spectral flux.");
-			Gdx.app.debug("Audio Analyzer", "window count: " + bassSpectralFlux.size);
-			Gdx.app.debug("Audio Analyzer", "USING SEED: " + PUID);
-			progress = 100;
-		}
-		done = true;
-	}
-	
-	public synchronized int getProgress() {
-		return progress;
-	}
-	public FloatArray getBassSpectralFlux() {
-		return bassSpectralFlux;
-	}
-	public FloatArray getmSpectralFlux() {
-		return mSpectralFlux;
-	}
-	public FloatArray getUmSpectralFlux() {
-		return umSpectralFlux;
-	}
-	public int getPUID() {
-		return PUID;
-	}
-	public boolean isDone() {
-		return done;
-	}
-	public boolean isWorking() {
-		return work;
-	}
-	public void setWork(boolean work) {
-		this.work = work;
-	}
-	public MusicManager getMusicManager() {
-		return musicManager;
-	}
-}

core/src/zero1hd/rhythmbullet/audio/analyzer/ThresholdCalcRunnable.java

@@ -1,102 +0,0 @@
-package zero1hd.rhythmbullet.audio.analyzer;
-
-import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.utils.FloatArray;
-
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public class ThresholdCalcRunnable implements Runnable {
-	boolean work = true;
-	private boolean done;
-	
-	private MusicManager musicManager;
-	
-	private FloatArray bassSpectralFlux;
-	private FloatArray mSpectralFlux;
-	private FloatArray umSpectralFlux;
-	private FloatArray bassThreshold = new FloatArray();
-	private FloatArray mThreshold = new FloatArray();
-	private FloatArray umThreshold = new FloatArray();
-	
-	public ThresholdCalcRunnable(SpectralFluxAnalysisRunnable sfar) {
-		this.bassSpectralFlux = sfar.getBassSpectralFlux();
-		this.mSpectralFlux = sfar.getmSpectralFlux();
-		this.umSpectralFlux = sfar.getUmSpectralFlux();
-		this.musicManager = sfar.getMusicManager();
-	}
-	
-	@Override
-	public void run() {
-		Gdx.app.debug("Audio Analyzer", "beginning threshold calc.");
-
-		float bassThresholdMultiplier = 1.5f;
-		float mThresholdMultiplier = 1.4f;
-		float umThresholdMultiplier = 1.4f;
-		
-		int bassThresholdCalcRange = thresholdRangeCalc(0.27f);
-		int mThresholdCalcRange = thresholdRangeCalc(0.4f);
-		int umThresholdCalcRange = thresholdRangeCalc(0.4f);
-		//threshold calculation
-		for (int i = 0; i < umSpectralFlux.size && work; i++) {
-			int start = Math.max(0, i - bassThresholdCalcRange/2);
-			int end = Math.min(umSpectralFlux.size - 1, i + bassThresholdCalcRange/2);
-			float average = 0;
-			for (int j = start; j <= end; j++) {
-				average += bassSpectralFlux.get(j);
-			}
-			average /= (end - start);
-			bassThreshold.add(average * bassThresholdMultiplier);
-			
-			start = Math.max(0, i - mThresholdCalcRange/2);
-			end = Math.min(umSpectralFlux.size - 1, i + mThresholdCalcRange/2);
-			average = 0;
-			for (int j = start; j <= end; j++) {
-				average+= mSpectralFlux.get(j);
-			}
-			average /= (end - start);
-			mThreshold.add(average*mThresholdMultiplier);
-			
-			start = Math.max(0, i - umThresholdCalcRange/2);
-			end = Math.min(umSpectralFlux.size - 1, i + umThresholdCalcRange/2);
-			average = 0;
-			for (int j = start; j <= end; j++) {
-				average+= umSpectralFlux.get(j);
-			}
-			average /= (end - start);
-			umThreshold.add(average*umThresholdMultiplier);
-		}
-		Gdx.app.debug("Audio Analyzer", "Threshold calculated.");
-		done = true;
-	}
-	
-	private int thresholdRangeCalc(float durationOfRange) {
-		return (int) (durationOfRange/(musicManager.getReadWindowSize()/musicManager.getSampleRate()));
-	}
-	
-	public boolean isDone() {
-		return done;
-	}
-	
-	public FloatArray getBassSpectralFlux() {
-		return bassSpectralFlux;
-	}
-	public FloatArray getmSpectralFlux() {
-		return mSpectralFlux;
-	}
-	public FloatArray getUmSpectralFlux() {
-		return umSpectralFlux;
-	}
-	public FloatArray getBassThreshold() {
-		return bassThreshold;
-	}
-	public FloatArray getmThreshold() {
-		return mThreshold;
-	}
-	public FloatArray getUmThreshold() {
-		return umThreshold;
-	}
-	
-	public MusicManager getMusicManager() {
-		return musicManager;
-	}
-}

core/src/zero1hd/rhythmbullet/audio/processor/AudioProcessor.java

@@ -1,14 +1,9 @@
 package zero1hd.rhythmbullet.audio.processor;
 
+import com.badlogic.gdx.files.FileHandle;
 import com.badlogic.gdx.utils.Disposable;
 
 public interface AudioProcessor extends Disposable {
-	/**
-	 * Called once, contains the initiation to the stream, only called when play-back begins.
-	 * Not thread safe as it should be the first thing to be called during read process.
-	 */
-	public void initiate();
-	
 	/**
 	 * @return number of channels
 	 */
@@ -20,12 +15,30 @@ public interface AudioProcessor extends Disposable {
 	public int getSampleRate();
 	
 	/**
-	 * <b>Thread safe</b>
+	 * Reads samples with interwoven data for stereo.
-	 * Reads samples (NOT FRAMES) with interwoven data for stereo.
 	 * stored in 16 bit format (first 8 are the first byte of data while the second 8 are the second byte of data that composes a short value) 
 	 * @param pcm the array the samples should fill
-	 * @param syncObj the object that this object should use to synchronize multiple threads.
 	 * @return the amount of samples read.
 	 */
-	public int readSamples(short[] pcm, Object syncObj);
+	public int readSamples(short[] pcm);
+	
+	/**
+	 * Reads frames with interwoven data for stereo.
+	 * stored in 16 bit format (first 8 are the first byte of data while the second 8 are the second byte of data that composes a short value)
+	 * @param pcm the array the samples should fill
+	 * @return the amount of samples read.
+	 */
+	public int readFrames(float[] pcm);
+	
+	/**
+	 * 
+	 * @return The music file's {@link FileHandle}
+	 */
+	public FileHandle getMusicFileHandle();
+	
+	/**
+	 * 
+	 * @return the number of sample frames in the song.
+	 */
+	public long getSampleFrames();
 }

core/src/zero1hd/rhythmbullet/audio/processor/WAVAudioProcessor.java

@@ -16,31 +16,23 @@ public class WAVAudioProcessor implements AudioProcessor {
 	private byte[] buffer;
 	private FileHandle fileHandle;
 	private AudioInputStream audioInputStream;
-	private boolean initiated;
+	private long sampleFrames;
 	
 	public WAVAudioProcessor(FileHandle fileHandle) {
 		this.fileHandle = fileHandle;
 		AudioFormat format;
 		try {
-			format = AudioSystem.getAudioFileFormat(fileHandle.file()).getFormat();
+			audioInputStream = AudioSystem.getAudioInputStream(fileHandle.file());
+			format = audioInputStream.getFormat();
 			stereo = format.getChannels() > 1 ? true : false;
 			sampleRate = (int) format.getSampleRate();
+			sampleFrames = audioInputStream.getFrameLength();
 		} catch (UnsupportedAudioFileException | IOException e) {
 			Gdx.app.debug("WAVAudioProcessor", "Couldn't instantiate WAVAUdioProcessor due to error.");
 			e.printStackTrace();
 		}
-
-	}
-	
-	@Override
-	public void initiate() {
-		try {
-			audioInputStream = AudioSystem.getAudioInputStream(fileHandle.file());
-		} catch (UnsupportedAudioFileException | IOException e) {
-			e.printStackTrace();
-		}
 		buffer = new byte[audioInputStream.getFormat().getFrameSize()];
-		initiated = true;
+
 	}
 	
 	public boolean isStereo() {
@@ -52,9 +44,7 @@ public class WAVAudioProcessor implements AudioProcessor {
 	}
 	
 	@Override
-	public int readSamples(short[] pcm, Object syncObj) {
+	public int readSamples(short[] pcm) {
-		if (initiated) {
-			synchronized (syncObj) {
 		int framesRead = 0;
 		for (int sampleID = 0; sampleID < pcm.length; sampleID++) {
 			try {
@@ -74,9 +64,37 @@ public class WAVAudioProcessor implements AudioProcessor {
 		}
 		return framesRead;
 	}
-		} else {
+	
-			throw new IllegalStateException("Stream has not been initialized.");
+	@Override
+	public int readFrames(float[] pcm) {
+		int framesRead = 0;
+		for (int sampleID = 0; sampleID < pcm.length; sampleID++) {
+			try {
+				if (audioInputStream.read(buffer) > 0) {
+					pcm[sampleID] = (short) ((buffer[1] << 8) + (buffer[0] & 0x00ff));
+					if (stereo) {
+						short secondChan = (short) ((buffer[3] << 8) + (buffer[2] & 0x00ff));
+						pcm[sampleID] = secondChan > pcm[sampleID] ? secondChan : pcm[sampleID];
 					}
+					framesRead++;
+					pcm[sampleID] /= Short.MAX_VALUE+1;
+				}
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+			
+		}
+		return framesRead;
+	}
+	
+	@Override
+	public FileHandle getMusicFileHandle() {
+		return fileHandle;
+	}
+	
+	@Override
+	public long getSampleFrames() {
+		return sampleFrames;
 	}
 	
 	@Override

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

@@ -0,0 +1,15 @@
+package zero1hd.rhythmbullet.audio.visualizer;
+
+import edu.emory.mathcs.jtransforms.fft.FloatFFT_1D;
+
+public class BasicFFT {
+	private FloatFFT_1D fft;
+	
+	public BasicFFT(int window) {
+		fft = new FloatFFT_1D(window);
+	}
+	
+	public void fft(float[] PCM) {
+		fft.realForward(PCM);
+	}
+}

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

@@ -1,75 +0,0 @@
-package zero1hd.rhythmbullet.audio.visualizer;
-
-import com.badlogic.gdx.graphics.Color;
-import com.badlogic.gdx.graphics.g2d.Batch;
-import com.badlogic.gdx.graphics.g2d.Sprite;
-import com.badlogic.gdx.math.MathUtils;
-import com.badlogic.gdx.math.Vector2;
-
-public class MirrorVisualizer {
-	private int xPos, yPos;
-	private float rotation;
-	private Sprite[] bars;
-	private boolean flip;
-	
-	private Vector2 rectCoordRot;
-	public MirrorVisualizer() {
-		rectCoordRot = new Vector2();
-	}
-	
-	public void setup(Sprite[] bars, float xPos, float yPos, float rotation) {
-		this.bars = new Sprite[bars.length];
-		this.xPos = (int) xPos;
-		this.yPos = (int) yPos;
-		this.rotation = rotation;
-		rectCoordRot.set(MathUtils.cosDeg(rotation), MathUtils.sinDeg(rotation));
-
-		for (int i = 0; i < bars.length; i++) {
-			this.bars[i] = new Sprite(bars[i]);
-		}
-	}
-	
-	public void render(int renderIndex, Batch batch, float parentAlpha, Sprite[] bars) {
-		this.bars[renderIndex].setSize(bars[renderIndex].getWidth(), bars[renderIndex].getHeight());
-		this.bars[renderIndex].draw(batch);
-	}
-	
-	public void position(int positionIndex, int barWidth, int spaceBetweenBars) {
-		if (flip) {
-			bars[positionIndex].setRotation(rotation+180);
-		} else {
-			bars[positionIndex].setRotation(rotation);
-		}
-		int barSpace = positionIndex*(barWidth+spaceBetweenBars);
-		bars[positionIndex].setPosition(xPos + barSpace*rectCoordRot.x, yPos + barSpace*rectCoordRot.y);
-	}
-	
-	public void setColor(Color color) {
-		for (int i = 0; i < bars.length; i++) {
-			bars[i].setColor(color);
-		}
-	}
-	
-	public void setColor(float r, float g, float b, float a) {
-		for (int i = 0; i < bars.length; i++) {
-			bars[i].setColor(r, g, b, a);
-		}
-	}
-	
-	public float getRotation() {
-		return rotation;
-	}
-	
-	public void setRotation(float rotation) {
-		this.rotation = rotation;
-	}
-	
-	public void setyPos(int yPos) {
-		this.yPos = yPos;
-	}
-	
-	public void setxPos(int xPos) {
-		this.xPos = xPos;
-	}
-
-}

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

@@ -1,51 +0,0 @@
-package zero1hd.rhythmbullet.audio.visualizer;
-
-import java.util.concurrent.locks.ReentrantLock;
-
-import com.badlogic.gdx.utils.Disposable;
-
-import edu.emory.mathcs.jtransforms.fft.FloatFFT_1D;
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public class MusicManagerFFT implements Disposable {
-	protected MusicManager mm;
-	private FloatFFT_1D fft;
-	private boolean calc;
-	private ReentrantLock lock;
-	protected float[] audioPCM;
-	
-	public MusicManagerFFT() {
-		lock = new ReentrantLock();
-	}
-	
-	public void calculate() {
-		if (mm != null && calc && mm.isPlaying()) {
-			lock.lock();
-			fft.realForward(audioPCM);
-			lock.unlock();
-		}
-	}
-	
-	public void setMM(MusicManager mm) {
-		lock.lock();
-		calc = false;
-		if (audioPCM == null || audioPCM.length != mm.getReadWindowSize()) {
-			audioPCM = new float[mm.getReadWindowSize()];
-			fft = new FloatFFT_1D(mm.getReadWindowSize());
-		}
-		this.mm = mm;
-		calc = true;
-		lock.unlock();
-	}
-	
-	@Override
-	public void dispose() {
-	}
-	
-	public MusicManager getMm() {
-		return mm;
-	}
-	public float[] getAudioPCM() {
-		return audioPCM;
-	}
-}

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

@@ -1,21 +0,0 @@
-package zero1hd.rhythmbullet.audio.visualizer;
-
-import com.badlogic.gdx.graphics.g2d.Batch;
-import com.badlogic.gdx.utils.Disposable;
-
-import zero1hd.rhythmbullet.audio.MusicManager;
-
-public interface Visualizer extends Disposable {
-
-	void calcPCMData();
-
-	void setMM(MusicManager mm);
-	
-	MusicManager getMM();
-	
-	void render(Batch batch, float delta);
-	
-	float[] getAudioPCMData();
-	
-	void fft();
-}

desktop/src/zero1hd/rhythmbullet/desktop/audio/processor/DesktopAudioProcessorFactory.java

@@ -3,11 +3,12 @@ package zero1hd.rhythmbullet.desktop.audio.processor;
 import com.badlogic.gdx.files.FileHandle;
 
 import zero1hd.rhythmbullet.audio.AudioProcessorFactory;
+import zero1hd.rhythmbullet.audio.MinimalAudioHeader;
 import zero1hd.rhythmbullet.audio.processor.AudioProcessor;
 
 public class DesktopAudioProcessorFactory implements AudioProcessorFactory {
 	@Override
 	public AudioProcessor newMP3AudioProcessor(FileHandle fileHandle) {
-		return new MP3AudioProcessor(fileHandle);
+		return new MP3AudioProcessor(fileHandle, new MinimalAudioHeader(fileHandle));
 	}
 }

desktop/src/zero1hd/rhythmbullet/desktop/audio/processor/MP3AudioProcessor.java

@@ -2,7 +2,6 @@ package zero1hd.rhythmbullet.desktop.audio.processor;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.files.FileHandle;
-import com.badlogic.gdx.utils.GdxRuntimeException;
 
 import javazoom.jl.decoder.Bitstream;
 import javazoom.jl.decoder.BitstreamException;
@@ -10,12 +9,14 @@ import javazoom.jl.decoder.DecoderException;
 import javazoom.jl.decoder.Header;
 import javazoom.jl.decoder.MP3Decoder;
 import javazoom.jl.decoder.OutputBuffer;
+import zero1hd.rhythmbullet.audio.MinimalAudioHeader;
 import zero1hd.rhythmbullet.audio.processor.AudioProcessor;
 
 
 public class MP3AudioProcessor implements AudioProcessor {
 	private boolean stereo;
 	private int sampleRate;
+	private long sampleFrames;
 	private FileHandle fileHandle;
 	private byte[] currentByteSet;
 	private byte[] workset;
@@ -25,30 +26,16 @@ public class MP3AudioProcessor implements AudioProcessor {
 	private int indexHead = -1;
 	
 	
-	public MP3AudioProcessor(FileHandle fileHandle) {
+	public MP3AudioProcessor(FileHandle fileHandle, MinimalAudioHeader minimalAudioHeader) {
 		this.fileHandle = fileHandle;
 		
 		bitstream = new Bitstream(fileHandle.read());
 		
-		try {
-			Header header = bitstream.readFrame();
-			if (header == null) throw new GdxRuntimeException("Empty MP3");
-			stereo = header.mode() == Header.DUAL_CHANNEL;
-			sampleRate = header.getSampleRate();
-		} catch (BitstreamException e) {
-			throw new GdxRuntimeException("error while preloading mp3", e);
-		}
 		
-		try {
+		stereo = minimalAudioHeader.getChannelCount() == 1 ? false : true;
-			bitstream.close();
+		sampleRate = minimalAudioHeader.getSampleRate();
-		} catch (BitstreamException e) {
+		sampleFrames = minimalAudioHeader.estimateSampleFrames();
-			e.printStackTrace();
-		}
-	}
 		
-	@Override
-	public void initiate() {
-		bitstream = new Bitstream(fileHandle.read());
 		decoder = new MP3Decoder();
 		sampleBuffer = new OutputBuffer(stereo ? 2 : 1, false);
 		decoder.setOutputBuffer(sampleBuffer);
@@ -67,8 +54,8 @@ public class MP3AudioProcessor implements AudioProcessor {
 	}
 	
 	@Override
-	public int readSamples(short[] pcm, Object syncObj) {
+	public int readSamples(short[] pcm) {
-		int framesRead = 0;
+		int samplesRead = 0;
 		for (int sid = 0; sid < pcm.length; sid++) {
 			for (int wsid = 0; wsid < workset.length; wsid++) {
 				workset[wsid] = nextByte();
@@ -78,9 +65,28 @@ public class MP3AudioProcessor implements AudioProcessor {
 				if (stereo) {
 					short altChan = (short) ((workset[3] << 8) + (workset[2] & 0x00ff));
 					sid++;
+					pcm[sid] = altChan;
+				}
+				samplesRead ++;
+			}
+		}
+		return samplesRead;
+	}
+	
+	@Override
+	public int readFrames(float[] pcm) {
+		int framesRead = 0;
+		for (int sid = 0; sid < pcm.length; sid++) {
+			for (int wsid = 0; wsid < workset.length; wsid++) {
+				workset[wsid] = nextByte();
+			}
+			if (currentByteSet != null) {
+				pcm[sid] += (workset[1] << 8) + (workset[0] & 0x00ff);
+				if (stereo) {
+					short altChan = (short) ((workset[3] << 8) + (workset[2] & 0x00ff));
 					pcm[sid] = altChan > pcm[sid] ? altChan : pcm[sid];
 				}
-				framesRead ++;
+				framesRead++;
 				pcm[sid] /= Short.MAX_VALUE+1;
 			}
 		}
@@ -129,6 +135,16 @@ public class MP3AudioProcessor implements AudioProcessor {
 		}
 	}
 	
+	@Override
+	public FileHandle getMusicFileHandle() {
+		return fileHandle;
+	}
+	
+	@Override
+	public long getSampleFrames() {
+		return sampleFrames;
+	}
+	
 	@Override
 	public void dispose() {
 		Gdx.app.debug("MP3Manager", "Disposing...");

desktop/src/zero1hd/rhythmbullet/desktop/audio/visualizer/DoubleHorizontalVisualizer.java

@@ -0,0 +1,112 @@
+package zero1hd.rhythmbullet.desktop.audio.visualizer;
+
+import com.badlogic.gdx.graphics.g2d.Batch;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
+
+import zero1hd.rhythmbullet.audio.MusicController;
+
+public class DoubleHorizontalVisualizer {
+	private int width, height, barCount, barWidth, spaceBetweenBars;
+	private int x, y;
+	private float barRate = 0.75f;
+	private ShapeRenderer shapeRenderer;
+	private PCMMachine pcm;
+	private int smoothRange;
+	private int multiplier = 300;
+	private int[] amplitudes;
+	private int[] barHeights;
+	private int binsPerBar;
+	
+	/**
+	 * 
+	 * @param barCount amount of bars this visualizer should have.
+	 * @param width the width of the visualizer.
+	 * @param spacePercentage the percentage of a bar that should be space.
+	 */
+	public DoubleHorizontalVisualizer(int barCount, int width, float spacePercentage, int height, MusicController musicController) {
+		this.barCount = barCount;
+		this.barWidth = width/barCount;
+		this.spaceBetweenBars = (int) (barWidth * spacePercentage);
+		this.barWidth -= spaceBetweenBars;
+		if (barWidth < 1) throw new IllegalArgumentException("The arguments you passed caused the bar width to be 0.");
+		binsPerBar = (pcm.getWindowSize()/barCount);
+		this.width = width;
+		this.height = height;
+		pcm = new PCMMachine(musicController);
+		amplitudes = new int[barCount];
+		barHeights = new int[barCount];
+		shapeRenderer = new ShapeRenderer();
+		shapeRenderer.set(ShapeType.Filled);
+	}
+	
+	public void act(float delta) {
+		for (int bar = 0; bar < amplitudes.length; bar++) {
+			float normalizedAmplitude = 0;
+			for (int freq = bar*binsPerBar; freq < bar*binsPerBar + binsPerBar; freq++) {
+				normalizedAmplitude += Math.abs(pcm.getFrequencyBins()[freq]);
+			}
+			amplitudes[bar] = (int) (normalizedAmplitude*multiplier);
+			amplitudes[bar] /= binsPerBar;
+			
+			float cappedDelta = Math.max(0, delta);
+			cappedDelta = Math.min(1f, delta);
+			
+			barHeights[bar] += Math.max(0, (amplitudes[bar] - barHeights[bar]) * barRate * cappedDelta);
+			
+		}
+		for (int bar = 1; bar <= barHeights.length; bar++) {
+			int smoothCount = 1;
+			for (int range = 0; range < smoothRange; range++) {
+				if (bar+range < amplitudes.length) {
+					barHeights[bar] += amplitudes[bar+range];
+					smoothCount++;
+				}
+				if (bar-range > 0) {
+					barHeights[bar] += amplitudes[bar-range];
+					smoothCount++;
+				}
+			}
+			barHeights[bar] /= smoothCount;
+		}
+	}
+	
+	public void draw(Batch batch, float parentAlpha) {
+		shapeRenderer.begin();
+		int beginX = x + spaceBetweenBars/2, beginY = y;
+		for (int bar = 0; bar < barCount; bar++) {
+			shapeRenderer.rect(beginX + spaceBetweenBars*bar, beginY+height, beginX+barWidth, beginY+barHeights[bar]+height);
+			shapeRenderer.rect(beginX + spaceBetweenBars*bar, beginY, beginX+barWidth, beginY+barHeights[barHeights.length - 1 - bar]);
+		}
+		shapeRenderer.end();
+	}
+	
+	public int getWidth() {
+		return width;
+	}
+	
+	public int getHeight() {
+		return height;
+	}
+	
+	public void setX(int x) {
+		this.x = x;
+	}
+	
+	public void setY(int y) {
+		this.y = y;
+	}
+	
+	public void setPosition(int x, int y) {
+		this.x = x;
+		this.y = y;
+	}
+	
+	public int getX() {
+		return x;
+	}
+	
+	public int getY() {
+		return y;
+	}
+}

desktop/src/zero1hd/rhythmbullet/desktop/audio/visualizer/PCMMachine.java

@@ -11,17 +11,20 @@ import org.lwjgl.openal.AL11;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.backends.lwjgl.audio.OpenALMusic;
+import com.badlogic.gdx.utils.Disposable;
 import com.badlogic.gdx.utils.TimeUtils;
 import com.badlogic.gdx.utils.reflect.ClassReflection;
 import com.badlogic.gdx.utils.reflect.Field;
 import com.badlogic.gdx.utils.reflect.ReflectionException;
 
-import zero1hd.rhythmbullet.audio.MinimalAudioHeader;
 import zero1hd.rhythmbullet.audio.MusicController;
+import zero1hd.rhythmbullet.audio.visualizer.BasicFFT;
 
-public class DesktopVisualizer implements Observer {
+public class PCMMachine implements Observer, Disposable {
 	private int windowSize = 1024;
 	private float[] PCM = new float[windowSize];
+	private float[] frequencyBins = new float[windowSize/2];
+	private BasicFFT fft = new BasicFFT(windowSize);
 	private ShortBuffer playingBuffer;
 	private ShortBuffer compareBuffer;
 	private ShortBuffer buffer;
@@ -32,8 +35,11 @@ public class DesktopVisualizer implements Observer {
 	private BufferStreamReadThread streamReadThread;
 	private int windowsRead;
 	private int currentPlaybackWindow;
+	private volatile boolean updated;
 
-	public DesktopVisualizer() {
+	public PCMMachine(MusicController musicController) {
+		this.mc = musicController;
+		mc.addObserver(this);
 		try {
 			Field bufferField = ClassReflection.getDeclaredField(OpenALMusic.class, "tempBuffer");
 			bufferField.setAccessible(true);
@@ -109,7 +115,7 @@ public class DesktopVisualizer implements Observer {
 		windowsRead = (int) ((mc.getCurrentPosition()*sampleRate)/windowSize);
 	}
 	
-	public void setMusic(MinimalAudioHeader header) {
+	private void setMusic() {
 		try {
 			Field sourceIDField = ClassReflection.getDeclaredField(OpenALMusic.class, "sourceID");
 			sourceIDField.setAccessible(true);
@@ -117,8 +123,9 @@ public class DesktopVisualizer implements Observer {
 		} catch (ReflectionException e) {
 			e.printStackTrace();
 		}
-		channelCount = header.getChannelCount();
+		
-		sampleRate = header.getSampleRate();
+		channelCount = mc.getCurrentMusicHeader().getChannelCount();
+		sampleRate = mc.getCurrentMusicHeader().getSampleRate();
 		
 		playingBuffer = ShortBuffer.allocate(buffer.capacity()*2);
 		buffer.rewind();
@@ -133,15 +140,26 @@ public class DesktopVisualizer implements Observer {
 		buffer.rewind();
 	}
 	
-	public synchronized float[] getAudioPCM() {
+	public float[] getFrequencyBins() {
-		return PCM;
+		if (updated) {
+			synchronized (PCM) {
+				fft.fft(PCM);
+				System.arraycopy(PCM, 0, frequencyBins, 0, frequencyBins.length);
+			}
+		}
+		return frequencyBins;
 	}
 	
-	public class BufferStreamReadThread implements Runnable {
+	public int getWindowSize() {
+		return windowSize;
+	}
+	
+	private class BufferStreamReadThread implements Runnable {
 		private String name = "PCM-Audio-Processing";
 		private Thread thread;
-		private boolean run, paused;
+		private volatile boolean run;
-		private volatile long timeOfLastRead;
+		private boolean paused;
+		private long timeOfLastRead;
 		private int waitTime;
 		
 		@Override
@@ -155,10 +173,10 @@ public class DesktopVisualizer implements Observer {
 					waitTime = sampleRate/windowSize/Gdx.graphics.getFramesPerSecond();
 					if (TimeUtils.timeSinceMillis(timeOfLastRead) >= waitTime) {
 						calcPCMData();
+						updated = true;
 						windowsRead++;
 						timeOfLastRead = TimeUtils.millis();
 						
-						
 						currentPlaybackWindow = (int) ((mc.getCurrentPosition()*sampleRate)/windowSize);
 						if (windowsRead != currentPlaybackWindow) {
 							synchronizeBufferWithPlayback();
@@ -177,22 +195,28 @@ public class DesktopVisualizer implements Observer {
 			}
 		}
 		
-		public synchronized void start() {
+		public void start() {
 			if (thread == null && !thread.isAlive()) {
 				thread = new Thread(this, name);
 				thread.start();
 			} else {
+				synchronized (this) {
 					notify();
 				}
 			}
 		}
 		
+		public void stop() {
+			run = false;
+		}
+	}
+
 	@Override
 	public void update(Observable o, Object arg) {
 		if (o == mc) {
 			switch ((MusicController.States) arg) {
 			case Loaded:
-				setMusic(mc.getCurrentMusicHeader());
+				setMusic();
 				break;
 			case Playing:
 				streamReadThread.start();
@@ -202,4 +226,9 @@ public class DesktopVisualizer implements Observer {
 			}
 		}
 	}
+
+	@Override
+	public void dispose() {
+		streamReadThread.stop();
+	}
 }

desktop/src/zero1hd/rhythmbullet/desktop/graphics/ui/components/HorizontalVisualizerWidget.java

@@ -8,7 +8,7 @@ import com.badlogic.gdx.scenes.scene2d.ui.Widget;
 import com.badlogic.gdx.utils.Disposable;
 
 import zero1hd.rhythmbullet.audio.visualizer.HorizontalVisualizer;
-import zero1hd.rhythmbullet.desktop.audio.visualizer.DesktopVisualizer;
+import zero1hd.rhythmbullet.desktop.audio.visualizer.PCMMachine;
 
 public class HorizontalVisualizerWidget extends Widget implements Disposable {
 	private HorizontalVisualizer vis;
@@ -18,7 +18,7 @@ public class HorizontalVisualizerWidget extends Widget implements Disposable {
 	private float visRefreshRate;
 	private float timer;
 	public HorizontalVisualizerWidget() {
-		vis = new HorizontalVisualizer(new DesktopVisualizer());
+		vis = new HorizontalVisualizer(new PCMMachine());
 	}
 	
 	@Override

desktop/src/zero1hd/rhythmbullet/desktop/screens/GameScreen.java

@@ -11,7 +11,7 @@ import com.badlogic.gdx.utils.viewport.ExtendViewport;
 
 import zero1hd.rhythmbullet.RhythmBullet;
 import zero1hd.rhythmbullet.audio.visualizer.CircularVisualizer;
-import zero1hd.rhythmbullet.desktop.audio.visualizer.DesktopVisualizer;
+import zero1hd.rhythmbullet.desktop.audio.visualizer.PCMMachine;
 import zero1hd.rhythmbullet.game.GameController;
 
 public class GameScreen extends ScreenAdapter {
@@ -25,7 +25,7 @@ public class GameScreen extends ScreenAdapter {
 		this.assets = assets;
 		batch = new SpriteBatch();
 		viewport = new ExtendViewport(RhythmBullet.WORLD_WIDTH, RhythmBullet.WORLD_HEIGHT);
-		circleVisualizer = new CircularVisualizer(new DesktopVisualizer());
+		circleVisualizer = new CircularVisualizer(new PCMMachine());
 		circleVisualizer.setCenter(Gdx.graphics.getWidth()/2, Gdx.graphics.getHeight()/2);
 		circleVisualizer.setCamera(viewport.getCamera());
 		circleVisualizer.setColor(Color.CYAN.toFloatBits());