Replace Javax Sound with direct alsa access

src/com/limelight/binding/PlatformBinding.java

@@ -3,7 +3,7 @@ package com.limelight.binding;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 
-import com.limelight.binding.audio.JavaxAudioRenderer;
+import com.limelight.binding.audio.AlsaAudioRenderer;
 import com.limelight.binding.video.OmxDecoderRenderer;
 import com.limelight.nvstream.av.audio.AudioRenderer;
 import com.limelight.nvstream.av.video.VideoDecoderRenderer;
@@ -40,6 +40,6 @@ public class PlatformBinding {
 	 * @return an audio decoder and renderer
 	 */
 	public static AudioRenderer getAudioRenderer() {
-		return new JavaxAudioRenderer();
+		return new AlsaAudioRenderer();
 	}
 }

src/com/limelight/binding/audio/AlsaAudio.java

@@ -0,0 +1,17 @@
+package com.limelight.binding.audio;
+
+/**
+ * JNI Alsa bindings
+ * @author Iwan Timmer
+ */
+public class AlsaAudio {
+	static {
+		System.loadLibrary("nv_alsa");
+	}
+	
+	public static native int init(int channelCount, int sampleRate);
+	
+	public static native void close();
+	
+	public static native int play(byte[] indata, int inoff, int inlen);
+}

src/com/limelight/binding/audio/AlsaAudioRenderer.java

@@ -0,0 +1,26 @@
+package com.limelight.binding.audio;
+
+import com.limelight.nvstream.av.audio.AudioRenderer;
+
+/**
+ * Audio renderer implementation
+ * @author Iwan Timmer
+ */
+public class AlsaAudioRenderer implements AudioRenderer {
+
+	@Override
+	public void streamInitialized(int channelCount, int sampleRate) {
+		AlsaAudio.init(channelCount, sampleRate);
+	}
+
+	@Override
+	public void playDecodedAudio(byte[] bytes, int offset, int length) {
+		AlsaAudio.play(bytes, offset, length);
+	}
+
+	@Override
+	public void streamClosing() {
+		AlsaAudio.close();
+	}
+	
+}

src/com/limelight/binding/audio/JavaxAudioRenderer.java

@@ -1,87 +0,0 @@
-package com.limelight.binding.audio;
-
-import javax.sound.sampled.AudioFormat;
-import javax.sound.sampled.AudioSystem;
-import javax.sound.sampled.DataLine;
-import javax.sound.sampled.LineUnavailableException;
-import javax.sound.sampled.SourceDataLine;
-
-import com.limelight.nvstream.av.audio.AudioRenderer;
-import java.nio.ByteOrder;
-
-/**
- * Audio renderer implementation
- * @author Cameron Gutman<br>
- * Iwan Timmer
- */
-public class JavaxAudioRenderer implements AudioRenderer {
-
-	private SourceDataLine soundLine;
-	private int channelCount;
-	private int sampleRate;
-	
-	public static final int DEFAULT_BUFFER_SIZE = 4096;
-	
-	/**
-	 * Takes some audio data and writes it out to the renderer.
-	 * @param pcmData the array that contains the audio data
-	 * @param offset the offset at which the data starts in the array
-	 * @param length the length of data to be rendered
-	 */
-	@Override
-	public void playDecodedAudio(byte[] pcmData, int offset, int length) {
-		soundLine.write(pcmData, offset, length);
-	}
-
-	/**
-	 * Callback for when the stream session is closing and the audio renderer should stop.
-	 */
-	@Override
-	public void streamClosing() {
-		if (soundLine != null) {
-			soundLine.close();
-		}
-	}
-
-	private void createSoundLine(int bufferSize) {
-		AudioFormat audioFormat = new AudioFormat(sampleRate, 16, channelCount, true, ByteOrder.nativeOrder()==ByteOrder.BIG_ENDIAN);
-		
-		DataLine.Info info;
-		
-		if (bufferSize == DEFAULT_BUFFER_SIZE) {
-			info = new DataLine.Info(SourceDataLine.class, audioFormat);
-		}
-		else {
-			info = new DataLine.Info(SourceDataLine.class, audioFormat, bufferSize);
-		}
-		
-		try {
-			soundLine = (SourceDataLine) AudioSystem.getLine(info);
-			
-			if (bufferSize == DEFAULT_BUFFER_SIZE) {
-				soundLine.open(audioFormat);
-			}
-			else {
-				soundLine.open(audioFormat, bufferSize);
-			}
-			
-			soundLine.start();
-		} catch (LineUnavailableException e) {
-			soundLine = null;
-		}
-	}
-
-	/**
-	 * The callback for the audio stream being initialized and starting to receive.
-	 * @param channelCount the number of channels in the audio
-	 * @param sampleRate the sample rate for the audio.
-	 */
-	@Override
-	public void streamInitialized(int channelCount, int sampleRate) {
-		this.channelCount = channelCount;
-		this.sampleRate = sampleRate;
-		
-		createSoundLine(DEFAULT_BUFFER_SIZE);
-	}
-
-}