progress on mp3 pcm processor

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

@@ -19,7 +19,7 @@ public class RhythmBulletAudioThread extends Thread {
 	public RhythmBulletAudioThread(int windowSize, VisualizableMusic vm) {
 		music = vm;
 		this.sp = vm.getSampleProcessor();
-		pcm = new short[sp.getChannels()*windowSize*2];
+		pcm = new short[(sp.isStereo() ? 2 : 1)*windowSize];
 		setName("RhythmBullet-AudioPlayback-Thread");
 		play();
 		start();
@@ -29,7 +29,7 @@ public class RhythmBulletAudioThread extends Thread {
 	@Override
 	public void run() {
 		sp.initiate();
-		this.ad = Gdx.audio.newAudioDevice(sp.getSampleRate(), (sp.getChannels() > 1 ? false : true));
+		this.ad = Gdx.audio.newAudioDevice(sp.getSampleRate(), !sp.isStereo());
 		
 		while (!terminated && sp.readSamples(pcm, this) > 0) {
 			ad.writeSamples(pcm, 0, pcm.length);

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

@@ -1,12 +1,11 @@
 package zero1hd.rhythmbullet.audio;
 
-import java.io.File;
 import java.io.IOException;
+import java.nio.file.Paths;
 
 import javax.sound.sampled.UnsupportedAudioFileException;
 
 import com.badlogic.gdx.audio.Music;
-import com.badlogic.gdx.files.FileHandle;
 
 import zero1hd.rhythmbullet.audio.processor.MP3PCMProcessor;
 import zero1hd.rhythmbullet.audio.processor.PCMProcessor;
@@ -17,19 +16,19 @@ public class VisualizableMusic implements Music {
 	private OnCompletionListener ocl;
 	private boolean looping;
 	private RhythmBulletAudioThread rat;
-	private File musicFile;
+	private String fileLoc;
 	private PCMProcessor sampleProcessor;
 	
-	public VisualizableMusic(FileHandle file) {
+	public VisualizableMusic(String fileLoc) {
-		musicFile = file.file();
+		this.fileLoc = fileLoc;
-		if (musicFile.getName().toLowerCase().endsWith("wav")) {
+		if (fileLoc.toLowerCase().endsWith("wav")) {
 			try {
-				sampleProcessor = new WAVPCMProcessor(musicFile, windowSize);
+				sampleProcessor = new WAVPCMProcessor(Paths.get(fileLoc), windowSize);
 			} catch (IOException | UnsupportedAudioFileException e) {
 				e.printStackTrace();
 			}
-		} else if (musicFile.getName().toLowerCase().endsWith("mp3")) {
+		} else if (fileLoc.toLowerCase().endsWith("mp3")) {
-			sampleProcessor = new MP3PCMProcessor(musicFile, windowSize);
+			sampleProcessor = new MP3PCMProcessor(Paths.get(fileLoc), windowSize);
 		}
 	}
 	

core/src/zero1hd/rhythmbullet/audio/processor/MP3PCMProcessor.java

@@ -1,68 +1,107 @@
 package zero1hd.rhythmbullet.audio.processor;
 
-import java.io.File;
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import fr.delthas.javamp3.Sound;
 
 public class MP3PCMProcessor implements PCMProcessor {
-	private int channels;
+	private boolean stereo;
 	private int sampleRate;
-	private byte[] buffer;
 	private volatile float volume, pan;
 	private boolean initiated;
+	private Sound audioInputStream;
+	private Path path;
+	private byte[] buffer;
 
-	public MP3PCMProcessor(File musicFile, int windowSize) {
+	public MP3PCMProcessor(Path path, int windowSize) {
-		
+		try(Sound sound = new Sound(new BufferedInputStream(Files.newInputStream(path)))) {
+			sampleRate = sound.getSamplingFrequency();
+			stereo = sound.isStereo();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 	}
 	
 	@Override
 	public void initiate() {
+		try {
+			audioInputStream = new Sound(new BufferedInputStream(Files.newInputStream(path)));
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		buffer = new byte[audioInputStream.getAudioFormat().getFrameSize()];
+		initiated = true;
 	}
 
 	@Override
-	public int getChannels() {
+	public boolean isStereo() {
-		// TODO Auto-generated method stub
+		return stereo;
-		return 0;
 	}
 
 	@Override
 	public int getSampleRate() {
-		// TODO Auto-generated method stub
+		return sampleRate;
-		return 0;
 	}
 
 	@Override
 	public int readSamples(short[] pcm, Object syncObj) {
-		// TODO Auto-generated method stub
+		if (initiated) {
-		return 0;
+			synchronized (syncObj) {
+				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));
+							pcm[sampleID] *= volume * (Math.min(1-pan, 1));
+							if (stereo) {
+								short secondChan = (short) ((buffer[3] << 8) + (buffer[2] & 0x00ff));
+								secondChan *= volume * (Math.min(1+pan, 1));
+								sampleID++;
+								pcm[sampleID] = secondChan;
+							}
+							framesRead++;
+						}
+					} catch (IOException e) {
+						e.printStackTrace();
+					}
+				}
+				return framesRead;
+			}
+		} else {
+			throw new IllegalStateException("Stream has not been initialized.");
+		}
 	}
 
 	@Override
 	public void setVolume(float volume) {
-		// TODO Auto-generated method stub
+		this.volume = volume;
-		
 	}
 
 	@Override
 	public float getVolume() {
-		// TODO Auto-generated method stub
+		return volume;
-		return 0;
 	}
 
 	@Override
 	public void setPan(float pan) {
-		// TODO Auto-generated method stub
+		this.pan = pan;
-		
 	}
 
 	@Override
 	public float getPan() {
-		// TODO Auto-generated method stub
+		return pan;
-		return 0;
 	}
 	
 
 	@Override
 	public void dispose() {
-		// TODO Auto-generated method stub
+		try {
-		
+			audioInputStream.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 	}
 }

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

@@ -13,7 +13,7 @@ public interface PCMProcessor extends Disposable {
 	/**
 	 * @return number of channels
 	 */
-	public int getChannels();
+	public boolean isStereo();
 	
 	/**
 	 * @return sample rate

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

@@ -1,7 +1,7 @@
 package zero1hd.rhythmbullet.audio.processor;
 
-import java.io.File;
 import java.io.IOException;
+import java.nio.file.Path;
 
 import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioInputStream;
@@ -9,18 +9,18 @@ import javax.sound.sampled.AudioSystem;
 import javax.sound.sampled.UnsupportedAudioFileException;
 
 public class WAVPCMProcessor implements PCMProcessor {
-	private int channels;
+	private boolean stereo;
 	private int sampleRate;
 	private byte[] buffer;
-	private File file;
+	private Path path;
 	private AudioInputStream audioInputStream;
 	private volatile float volume, pan;
 	private boolean initiated;
 	
-	public WAVPCMProcessor(File musicFile, int windowSize) throws IOException, UnsupportedAudioFileException {
+	public WAVPCMProcessor(Path path, int windowSize) throws IOException, UnsupportedAudioFileException {
-		this.file = musicFile;
+		this.path = path;
-		AudioFormat format = AudioSystem.getAudioFileFormat(file).getFormat();
+		AudioFormat format = AudioSystem.getAudioFileFormat(path.toFile()).getFormat();
-		channels = format.getChannels();
+		stereo = format.getChannels() > 1 ? true : false;
 		sampleRate = (int) format.getSampleRate();
 		volume = 1f;
 	}
@@ -28,7 +28,7 @@ public class WAVPCMProcessor implements PCMProcessor {
 	@Override
 	public void initiate() {
 		try {
-			audioInputStream = AudioSystem.getAudioInputStream(file);
+			audioInputStream = AudioSystem.getAudioInputStream(path.toFile());
 		} catch (UnsupportedAudioFileException | IOException e) {
 			e.printStackTrace();
 		}
@@ -36,8 +36,8 @@ public class WAVPCMProcessor implements PCMProcessor {
 		initiated = true;
 	}
 	
-	public int getChannels() {
+	public boolean isStereo() {
-		return channels;
+		return stereo;
 	}
 	
 	public int getSampleRate() {
@@ -54,7 +54,7 @@ public class WAVPCMProcessor implements PCMProcessor {
 						if (audioInputStream.read(buffer) > 0) {
 							pcm[sampleID] = (short) ((buffer[1] << 8) + (buffer[0] & 0x00ff));
 							pcm[sampleID] *= volume * (Math.min(1-pan, 1));
-							if (audioInputStream.getFormat().getChannels() > 1) {
+							if (stereo) {
 								short secondChan = (short) ((buffer[3] << 8) + (buffer[2] & 0x00ff));
 								secondChan *= volume * (Math.min(1+pan, 1));
 								sampleID++;
@@ -96,7 +96,10 @@ public class WAVPCMProcessor implements PCMProcessor {
 
 	@Override
 	public void dispose() {
-		// TODO Auto-generated method stub
+		try {
-		
+			audioInputStream.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 	}
 }