Began work on music selection UI

build.gradle

@@ -47,6 +47,8 @@ project(":desktop") {
         compile "org.apache.commons:commons-math3:3.2"
 
         compile "com.github.rwl:jtransforms:2.4.0"
+        
+        compile "com.mpatric:mp3agic:0.9.0"
     }
 }
 
@@ -75,6 +77,8 @@ project(":android") {
         compile "org.apache.commons:commons-math3:3.2"
 
         compile "com.github.rwl:jtransforms:2.4.0"
+        
+        compile "com.mpatric:mp3agic:0.9.0"
     }
 }
 
@@ -91,6 +95,8 @@ project(":core") {
         compile "org.apache.commons:commons-math3:3.2"
 
         compile "com.github.rwl:jtransforms:2.4.0"
+        
+        compile "com.mpatric:mp3agic:0.9.0"
     }
 }
 

core/src/zero1hd/polyjet/audio/WavAudioData.java

@@ -1,8 +1,7 @@
 package zero1hd.polyjet.audio;
 
-import java.io.BufferedInputStream;
 import java.io.IOException;
-import java.io.InputStream;
+import java.security.InvalidParameterException;
 
 import javax.sound.sampled.AudioFormat;
 
@@ -11,19 +10,19 @@ import com.badlogic.gdx.audio.Music;
 import com.badlogic.gdx.files.FileHandle;
 
 import zero1hd.wavedecoder.WavDecoder;
+import zero1hd.wavedecoder.WavInfo;
 
 public class WavAudioData implements AudioData {
 	private int readWindowSize = 1024;
-	private InputStream inStream;
-	private InputStream bufferedAudioIn;
 	private AudioFormat format;
 	int readIndex;
 	Music playbackMusic;
 	WavDecoder decoder;
+	WavInfo wavinfo;
 	
 	@Override
 	public void readIndexUpdate() {
-		readIndex = (int) (playbackMusic.getPosition() * decoder.getSampleRate() / readWindowSize);
+		readIndex = (int) (playbackMusic.getPosition() * wavinfo.getSampleRate() / readWindowSize);
 	}
 	
 	@Override
@@ -31,15 +30,21 @@ public class WavAudioData implements AudioData {
 		return readIndex;
 	}
 	
+	public void setInfo(WavInfo wavinfo) {
+		this.wavinfo = wavinfo;
+	}
+	
 	@Override
 	public void setAudioFile(FileHandle audioFileHandler) {
 		reset();
-
-		inStream = audioFileHandler.read();
-		bufferedAudioIn = new BufferedInputStream(inStream);
-		decoder.setAudioFile(audioFileHandler.file());
+		try {
+			decoder.setAudioFile(wavinfo);
+		} catch (InvalidParameterException | IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
 		playbackMusic = Gdx.audio.newMusic(audioFileHandler);
-		format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, (float) decoder.getSampleRate(), 16, decoder.getChannels(), decoder.getChannels()*2, (float)decoder.getSampleRate(), false);
+		format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, (float) wavinfo.getSampleRate(), 16, wavinfo.getChannels(), wavinfo.getChannels()*2, (float) wavinfo.getSampleRate(), false);
 	}
 	
 	@Override
@@ -49,16 +54,6 @@ public class WavAudioData implements AudioData {
 			playbackMusic.dispose();
 			playbackMusic = null;
 		}
-
-		if (inStream != null) {
-			try {
-				bufferedAudioIn.close();
-				inStream.close();
-			} catch (IOException e) {
-				// TODO Auto-generated catch block
-				e.printStackTrace();
-			}
-		}
 	}
 	
 	@Override

core/src/zero1hd/polyjet/ui/builders/MusicSelectable.java

@@ -1,16 +1,65 @@
 package zero1hd.polyjet.ui.builders;
 
-import com.badlogic.gdx.files.FileHandle;
-import com.badlogic.gdx.graphics.Texture;
-import com.badlogic.gdx.scenes.scene2d.Actor;
-import com.badlogic.gdx.scenes.scene2d.ui.Image;
+import java.io.IOException;
 
-public class MusicSelectable extends Actor {
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.files.FileHandle;
+import com.badlogic.gdx.graphics.Pixmap;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.scenes.scene2d.ui.Image;
+import com.badlogic.gdx.scenes.scene2d.ui.WidgetGroup;
+import com.mpatric.mp3agic.ID3v2;
+import com.mpatric.mp3agic.InvalidDataException;
+import com.mpatric.mp3agic.Mp3File;
+import com.mpatric.mp3agic.UnsupportedTagException;
+
+import zero1hd.wavedecoder.WavInfo;
+
+public class MusicSelectable extends WidgetGroup {
 	Image imageIcon;
 	FileHandle musicFile;
+	boolean invalidMusic;
+	long durationInSeconds;
+	String songName;
+	
+	WavInfo wavinfo;
+	
 	public MusicSelectable(FileHandle musicFile) {
 		this.musicFile = musicFile;
-		imageIcon = new Image(new Texture(musicFile));
 		
+		if (musicFile.extension().toLowerCase().equals("mp3")) {
+			try {
+				Mp3File mp3File = new Mp3File(musicFile.file());
+				durationInSeconds = mp3File.getLengthInSeconds();
+				
+				if (mp3File.hasId3v2Tag()) {
+					ID3v2 id3v2tag = mp3File.getId3v2Tag();
+					byte[] albumWorkBytes = id3v2tag.getAlbumImage();
+					
+					Pixmap albumArt = new Pixmap(albumWorkBytes, 0, albumWorkBytes.length);
+					Texture albumArtTexture = new Texture(albumArt);
+					imageIcon = new Image(albumArtTexture);
+					float scale = 0.25f*Gdx.graphics.getHeight()/imageIcon.getHeight();
+					
+					imageIcon.setScale(scale);
+					albumArtTexture.dispose();
+					
+					songName = id3v2tag.getTitle();
+				}
+			} catch (UnsupportedTagException | InvalidDataException | IOException e) {
+				e.printStackTrace();
+			}
+		} else {
+			wavinfo = new WavInfo(musicFile.file());
+			durationInSeconds = wavinfo.getDurationInSeconds();
+		}
+		if (durationInSeconds > 60 * 5) {
+			invalidMusic = true;
+		}
+		if (songName == null || songName.isEmpty()) {
+			songName = musicFile.name();
+		}
 	}
+	
+	
 }

core/src/zero1hd/wavedecoder/WavDecoder.java

@@ -1,96 +1,16 @@
 package zero1hd.wavedecoder;
 
-import java.io.DataInputStream;
-import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.security.InvalidParameterException;
 
 public class WavDecoder {
-	DataInputStream readStream;
-	private int channels;
-	private double sampleRate;
-	private int dataSize;
-	private int byteRate;
+	private WavInfo initialData;
 	
-	public void setAudioFile(File file) throws InvalidParameterException {
-		try {
-			FileInputStream audioFile = new FileInputStream(file);
-			readStream = new DataInputStream(audioFile);
-
-			if (!readBytesToString(4).equals("RIFF")) {
-				throw new InvalidParameterException("RIFF tag not found in header.");
-			}
-			dataSize = littleEndianIntBytes();
-
-			if (!readBytesToString(4).equals("WAVE")) {
-				throw new InvalidParameterException("WAVE format tag not found.");
-			}
-			
-			if (!readBytesToString(4).equals("fmt ")) {
-				throw new InvalidParameterException("fmt header not found.");
-			}
-			
-			if (readStream.readByte() != 16) {
-				throw new InvalidParameterException("Data not pcm?");
-			}
-			
-			readStream.skipBytes(3);
-			if (readStream.readByte() != 1) {
-				throw new InvalidParameterException("Data not pcm?");
-			}
-			readStream.skipBytes(1);
-
-			channels = readStream.readByte();
-			readStream.skipBytes(1);
-
-			sampleRate = littleEndianIntBytes();
-			
-			byteRate = littleEndianIntBytes();
-			
-			readStream.skipBytes(38);
-			
-			if (!readBytesToString(4).equals("data")) {
-				throw new InvalidParameterException("initial data section tag not found");
-			}
-			readStream.skipBytes(4);
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
+	public void setAudioFile(WavInfo info) throws InvalidParameterException, IOException {
+		initialData = info;
+		initialData.initDataStream();
+		initialData.getHeaderInfo();
 	}
-
-	private String readBytesToString(int bytesToRead) throws IOException {
-		byte byteString[] = new byte[bytesToRead];
-		readStream.read(byteString);
-		return new String(byteString);
-	}
-
-	private int littleEndianIntBytes() throws IOException {
-		int data = readStream.readInt();
-		return Integer.reverseBytes(data);
-	}
-	
-	private short readLittleEndianShort() throws IOException {
-		short data = readStream.readShort();
-		return Short.reverseBytes(data);
-	}
-	
-	public int getChannels() {
-		return channels;
-	}
-	
-	public double getSampleRate() {
-		return sampleRate;
-	}
-	
-	public int getByteRate() {
-		return byteRate;
-	}
-	
-	public int getDataSize() {
-		return dataSize;
-	}
-	
 	public int readSamples(float[] samples) {
 		int samplesRead = 0;
 		
@@ -98,13 +18,18 @@ public class WavDecoder {
 			try {
 				
 				int currentSample = 0;
-				for (int channel = 0; channel < channels; channel++) {
-					currentSample += readLittleEndianShort();
+				for (int channel = 0; channel < initialData.getChannels(); channel++) {
+					currentSample += initialData.readLittleEndianShort();
 				}
-				currentSample /= channels*Short.MAX_VALUE+1;
+				currentSample /= initialData.getChannels()*Short.MAX_VALUE+1;
 				samples[i] = currentSample;
 				samplesRead++;
 			} catch (IOException e) {
+				try {
+					initialData.closeStreams();
+				} catch (IOException e1) {
+					e1.printStackTrace();
+				}
 				break;
 			}
 		}

core/src/zero1hd/wavedecoder/WavInfo.java

@@ -0,0 +1,114 @@
+package zero1hd.wavedecoder;
+
+import java.io.DataInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.security.InvalidParameterException;
+
+public class WavInfo {
+	private int channels;
+	private double sampleRate;
+	private int dataSize;
+	private int byteRate;
+	private FileInputStream audioFile;
+	private DataInputStream readStream;
+	
+	public WavInfo(File file) throws InvalidParameterException {
+		try {
+			audioFile = new FileInputStream(file);
+			initDataStream();
+			getHeaderInfo();
+			closeStreams();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+	
+	protected void getHeaderInfo() throws IOException {
+		if (!readBytesToString(4).equals("RIFF")) { //4
+			throw new InvalidParameterException("RIFF tag not found in header.");
+		}
+		dataSize = littleEndianIntBytes(); //4
+
+		if (!readBytesToString(4).equals("WAVE")) { //4
+			throw new InvalidParameterException("WAVE format tag not found.");
+		}
+		
+		if (!readBytesToString(4).equals("fmt ")) { //4
+			throw new InvalidParameterException("fmt header not found.");
+		}
+		
+		if (readStream.readByte() != 16) { //1
+			throw new InvalidParameterException("Data not pcm?");
+		}
+		
+		readStream.skipBytes(3); //3
+		if (readStream.readByte() != 1) { //1
+			throw new InvalidParameterException("Data not pcm?");
+		}
+		readStream.skipBytes(1); //1
+
+		channels = readStream.readByte(); //1
+		readStream.skipBytes(1); //1
+
+		sampleRate = littleEndianIntBytes(); //4
+		
+		byteRate = littleEndianIntBytes(); //4
+		
+		readStream.skipBytes(38); //38
+		
+		if (!readBytesToString(4).equals("data")) { // 4
+			throw new InvalidParameterException("initial data section tag not found");
+		}
+	}
+	
+	protected void initDataStream() {
+		readStream = new DataInputStream(audioFile);
+	}
+	
+	protected void closeStreams() throws IOException {
+		readStream.close();
+		audioFile.close();
+	}
+	
+	private String readBytesToString(int bytesToRead) throws IOException {
+		byte byteString[] = new byte[bytesToRead];
+		readStream.read(byteString);
+		return new String(byteString);
+	}
+
+	private int littleEndianIntBytes() throws IOException {
+		int data = readStream.readInt();
+		return Integer.reverseBytes(data);
+	}
+	
+	protected short readLittleEndianShort() throws IOException {
+		short data = readStream.readShort();
+		return Short.reverseBytes(data);
+	}
+	
+	protected DataInputStream getReadStream() {
+		return readStream;
+	}
+	
+	public int getChannels() {
+		return channels;
+	}
+	
+	public int getByteRate() {
+		return byteRate;
+	}
+	
+	public int getDataSize() {
+		return dataSize;
+	}
+	
+	public double getSampleRate() {
+		return sampleRate;
+	}
+	
+	public long getDurationInSeconds() {
+		return (long) (dataSize/sampleRate);
+	}
+}