FFMPEGPlayer Audio Sink Refactoring ..

- AudioSink w/ AudioFrame and formats public

- ALAudioSink uses a circular buffer now, hence relaxes the one-threaded player mode

- FFMPEGMediaPlayer uses multiple audio frames (equal to the ALAudioSink number)
  and wraps data to NIO buffer w/o copy.

- FFMPEGMediaPlayer audio threading currently disabled: distorted sound
  Seems that the ALAudioSink's circular buffer usage is good enough for now.

- Verbosity only w/ DEBUG flag

- New SyncedRingbuffer for effcient synced buffering

14 files changed, 1217 insertions, 344 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/av/AudioSink.java b/src/jogl/classes/com/jogamp/opengl/util/av/AudioSink.java
new file mode 100644
index 000000000..5caeb969a
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/av/AudioSink.java
@@ -0,0 +1,168 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.opengl.util.av;
+
+import java.nio.ByteBuffer;
+
+import jogamp.opengl.Debug;
+
+public interface AudioSink {
+    public static final boolean DEBUG = Debug.debug("AudioSink");
+    
+    /** Specifies the audio data type. Currently only PCM is supported. */
+    public static enum AudioDataType { PCM };
+    
+    /**
+     * Specifies the audio data format.
+     */
+    public static class AudioDataFormat {
+        public AudioDataFormat(AudioDataType dataType, int sampleRate, int sampleSize, int channelCount, boolean signed, boolean littleEndian) {
+            this.dataType = dataType;
+            this.sampleRate = sampleRate;
+            this.sampleSize = sampleSize;
+            this.channelCount = channelCount;
+            this.signed = signed;
+            this.littleEndian = littleEndian;
+        }
+        /** Audio data type. */
+        public final AudioDataType dataType;
+        /** Sample rate in Hz (1/s). */
+        public final int sampleRate;
+        /** Sample size in bits. */
+        public final int sampleSize;
+        /** Number of channels. */
+        public final int channelCount;
+        public final boolean signed;
+        public final boolean littleEndian;
+        
+        public String toString() { 
+            return "AudioDataFormat[type "+dataType+", sampleRate "+sampleRate+", sampleSize "+sampleSize+", channelCount "+channelCount+
+                   ", signed "+signed+", "+(littleEndian?"little":"big")+"endian]"; }
+    }
+    /** Default {@link AudioDataFormat}, [type PCM, sampleRate 44100, sampleSize 16, channelCount 2, signed, littleEndian]. */    
+    public static final AudioDataFormat DefaultFormat = new AudioDataFormat(AudioDataType.PCM, 44100, 16, 2, true /* signed */, true /* littleEndian */);
+    
+    public static class AudioFrame {
+        public final ByteBuffer data;
+        public final int dataSize;
+        public final int audioPTS;
+        
+        public AudioFrame(ByteBuffer data, int dataSize, int audioPTS) {
+            if( dataSize > data.remaining() ) {
+                throw new IllegalArgumentException("Give size "+dataSize+" exceeds remaining bytes in ls "+data+". "+this);
+            }
+            this.data=data;
+            this.dataSize=dataSize;
+            this.audioPTS=audioPTS;
+        }
+        
+        public String toString() { return "AudioFrame[apts "+audioPTS+", data "+data+", payloadSize "+dataSize+"]"; }
+    }
+    
+    /** 
+     * Returns the <code>initialized state</code> of this instance.
+     * <p>
+     * The <code>initialized state</code> is affected by this instance
+     * overall availability, i.e. after instantiation,
+     * as well as by {@link #destroy()}.
+     * </p> 
+     */
+    public boolean isInitialized();
+
+    /** 
+     * Returns the preferred {@link AudioDataFormat} by this sink.
+     * <p>
+     * The preferred format shall reflect this sinks most native format,
+     * i.e. best performance w/o data conversion. 
+     * </p>
+     * @see #initSink(AudioDataFormat) 
+     */
+    public AudioDataFormat getPreferredFormat();
+    
+    /**
+     * Initializes the sink.
+     * <p>
+     * Implementation shall try to match the given <code>requestedFormat</code> {@link AudioDataFormat}
+     * as close as possible, regarding it's capabilities.
+     * </p>
+     * <p>
+     * A user may consider {@link #getPreferredFormat()} and pass this value
+     * to utilize best performance and <i>behavior</i>. 
+     * </p>
+     * The {@link #DefaultFormat} <i>should be</i> supported by all implementations.
+     * </p>
+     * @param requestedFormat the requested {@link AudioDataFormat}. 
+     * @param bufferCount number of buffers for sink
+     * @return if successful the chosen AudioDataFormat based on the <code>requestedFormat</code> and this sinks capabilities, otherwise <code>null</code>. 
+     */
+    public AudioDataFormat initSink(AudioDataFormat requestedFormat, int bufferCount);
+
+    
+    /** Destroys this instance, i.e. closes all streams and devices allocated. */
+    public void destroy();
+    
+    /** 
+     * Returns the number of bytes queued for playing.
+     * <p>
+     * {@link #initSink(AudioDataFormat)} must be called first.
+     * </p>
+     */
+    public int getQueuedByteCount();
+
+    /** 
+     * Returns the queued buffer time in milliseconds for playing.
+     * <p>
+     * {@link #initSink(AudioDataFormat)} must be called first.
+     * </p>
+     */
+    public int getQueuedTime();
+    
+    /** 
+     * Returns the number of buffers in the sink available for writing.
+     * <p>
+     * {@link #initSink(AudioDataFormat)} must be called first.
+     * </p>
+     */
+    public int getWritableBufferCount();
+    
+    /** 
+     * Returns true if data is available to be written in the sink.
+     * <p>
+     * {@link #initSink(AudioDataFormat)} must be called first.
+     * </p>
+     */
+    public boolean isDataAvailable(int data_size);
+
+    /** 
+     * Writes the remaining bytes of the given direct ByteBuffer to this sink.
+     * <p>
+     * The data must comply with the chosen {@link AudioDataFormat} as returned by {@link #initSink(AudioDataFormat)}.
+     * </p>
+     */
+    public void writeData(AudioFrame audioFrame);
+}
diff --git a/src/jogl/classes/com/jogamp/opengl/util/av/AudioSinkFactory.java b/src/jogl/classes/com/jogamp/opengl/util/av/AudioSinkFactory.java
new file mode 100644
index 000000000..40321fb6f
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/av/AudioSinkFactory.java
@@ -0,0 +1,65 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.opengl.util.av;
+
+import jogamp.opengl.util.av.NullAudioSink;
+
+import com.jogamp.common.util.ReflectionUtil;
+
+public class AudioSinkFactory {
+    private static final String ALAudioSinkClazzName = "jogamp.opengl.openal.av.ALAudioSink";
+    private static final String JavaAudioSinkClazzName = "jogamp.opengl.util.av.JavaSoundAudioSink";
+
+    public static AudioSink createDefault() {
+        final ClassLoader cl = GLMediaPlayerFactory.class.getClassLoader();
+        AudioSink sink = create(cl, ALAudioSinkClazzName);
+        if( null == sink ) {
+            sink = create(cl, JavaAudioSinkClazzName);
+        }
+        if( null == sink ) {
+            sink = new NullAudioSink();
+        }
+        return sink;
+    }
+
+    public static AudioSink create(final ClassLoader cl, String implName) {
+        final AudioSink audioSink;
+        if(ReflectionUtil.isClassAvailable(implName, cl)){
+            try {
+                audioSink = (AudioSink) ReflectionUtil.createInstance(implName, cl);
+                if( audioSink.isInitialized() ) {
+                    return audioSink;
+                }
+            } catch (Throwable t) { 
+                if(AudioSink.DEBUG) { System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage()); t.printStackTrace(); }
+            }
+        }
+        return null;
+    }
+
+}
diff --git a/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayer.java b/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayer.java
index 3eca01986..1825dbd47 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayer.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayer.java
@@ -57,6 +57,14 @@ import com.jogamp.opengl.util.texture.TextureSequence;
  * </ul>
  * </p>
  * <p>
+ * Implementations of this interface must implement:
+ * <pre>
+ *    public static final boolean isAvailable();
+ * </pre>
+ * to be properly considered by {@link GLMediaPlayerFactory#create(ClassLoader, String)}
+ * and {@link GLMediaPlayerFactory#createDefault()}.
+ * </p>
+ * <p>
  * Variable type, value range and dimension has been chosen to suit embedded CPUs
  * and characteristics of audio and video streaming.
  * Milliseconds of type integer with a maximum value of {@link Integer#MAX_VALUE} 
diff --git a/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayerFactory.java b/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayerFactory.java
index 6fcf20ed2..f09531f7f 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayerFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/av/GLMediaPlayerFactory.java
@@ -38,18 +38,24 @@ public class GLMediaPlayerFactory {
     private static final String FFMPEGMediaPlayerClazzName = "jogamp.opengl.util.av.impl.FFMPEGMediaPlayer";
     private static final String isAvailableMethodName = "isAvailable";
     
-    public static GLMediaPlayer create() {
+    public static GLMediaPlayer createDefault() {
         final ClassLoader cl = GLMediaPlayerFactory.class.getClassLoader();
-        if(Platform.OS_TYPE.equals(Platform.OSType.ANDROID)) {
-            if(AndroidVersion.SDK_INT >= 14) {
-                if(((Boolean)ReflectionUtil.callStaticMethod(AndroidGLMediaPlayerAPI14ClazzName, isAvailableMethodName, null, null, cl)).booleanValue()) {
-                    return (GLMediaPlayer) ReflectionUtil.createInstance(AndroidGLMediaPlayerAPI14ClazzName, cl);
-                }
-            }
+        GLMediaPlayer sink = create(cl, AndroidGLMediaPlayerAPI14ClazzName);
+        if( null == sink ) {
+            sink = create(cl, FFMPEGMediaPlayerClazzName);
         }
-        if(((Boolean)ReflectionUtil.callStaticMethod(FFMPEGMediaPlayerClazzName, isAvailableMethodName, null, null, cl)).booleanValue()) {
-            return (GLMediaPlayer) ReflectionUtil.createInstance(FFMPEGMediaPlayerClazzName, cl);
+        if( null == sink ) {
+            sink = new NullGLMediaPlayer();
         }
-        return new NullGLMediaPlayer();
+        return sink;
+    }
+    
+    public static GLMediaPlayer create(final ClassLoader cl, String implName) {
+        try {
+            if(((Boolean)ReflectionUtil.callStaticMethod(implName, isAvailableMethodName, null, null, cl)).booleanValue()) {
+                return (GLMediaPlayer) ReflectionUtil.createInstance(implName, cl);
+            }
+        } catch (Throwable t) { if(GLMediaPlayer.DEBUG) { System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage()); t.printStackTrace(); } }
+        return null;
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java b/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
index 23f9161d4..8356a2bae 100644
--- a/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
+++ b/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
@@ -32,6 +32,8 @@ import java.io.IOException;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLES2;
 
+import com.jogamp.common.os.AndroidVersion;
+import com.jogamp.common.os.Platform;
 import com.jogamp.opengl.util.texture.TextureSequence;
 
 import jogamp.common.os.android.StaticContext;
@@ -60,7 +62,13 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
     static final boolean available;
     
     static {
-        available = true; // default .. TODO: May restrict availability ? 
+        boolean _avail = false;
+        if(Platform.OS_TYPE.equals(Platform.OSType.ANDROID)) {
+            if(AndroidVersion.SDK_INT >= 14) {
+                _avail = true;
+            }
+        }
+        available = _avail;
     }
     
     public static final boolean isAvailable() { return available; }
diff --git a/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java
index 690948c5a..87c7b937a 100644
--- a/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java
+++ b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java
@@ -1,176 +1,428 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
 package jogamp.opengl.openal.av;
 
-import java.nio.Buffer;
-import java.nio.ByteBuffer;
 
-import java.lang.InterruptedException;
+import jogamp.opengl.util.av.SyncedRingbuffer;
 
-import jogamp.opengl.util.av.AudioSink;
-
-import com.jogamp.common.nio.Buffers;
-import com.jogamp.openal.*;
+import com.jogamp.openal.AL;
+import com.jogamp.openal.ALC;
+import com.jogamp.openal.ALCcontext;
+import com.jogamp.openal.ALCdevice;
+import com.jogamp.openal.ALFactory;
+import com.jogamp.opengl.util.av.AudioSink;
 
+/***
+ * OpenAL Audio Sink
+ */
 public class ALAudioSink implements AudioSink {
 
-    static ALC alc;
-    static AL al;
-    static ALCdevice device;
-    static ALCcontext context;
-
-    // AudioFormat parameters
-    public  static final int     SAMPLE_RATE = 44100;
-
-    // Chunk of audio processed at one time
-    public static final int BUFFER_SIZE = 1000;
+    /** Chunk of audio processed at one time. FIXME: Parameterize .. */
+    public static final int BUFFER_SIZE = 4096;
     public static final int SAMPLES_PER_BUFFER = BUFFER_SIZE / 2;
     
-    // Sample time values
-    public static final double SAMPLE_TIME_IN_SECS = 1.0 / SAMPLE_RATE;
-    public static final double BUFFER_TIME_IN_SECS = SAMPLE_TIME_IN_SECS * SAMPLES_PER_BUFFER;
+    private static final ALC alc;
+    private static final AL al;
+    private static final boolean staticAvailable;    
     
-    private static int NUM_BUFFERS = 5;
-    private static int bufferNumber = 0;
-    private static int[] buffers = new int[NUM_BUFFERS];
-    private static int[] source = new int[1];
-    private static boolean initBuffer = true;
-    private static int frequency = 44100;
-    private static int format = AL.AL_FORMAT_STEREO16;
+    private String deviceSpecifier;
+    private ALCdevice device;
+    private ALCcontext context;
+
+    /** Sample period in seconds */
+    public float samplePeriod;
+    /** Buffer period in seconds */
+    public float bufferPeriod;
     
-    private static boolean available = false;
+    static class ActiveBuffer {
+        ActiveBuffer(Integer name, int size) {
+            this.name = name;
+            this.size = size;
+        }
+        public final Integer name;
+        public final int size;
+        public String toString() { return "ABuffer[name "+name+", size "+size+"]"; }
+    }
     
+    int[] alBuffers = null;
+    private SyncedRingbuffer<Integer> alBufferAvail = null;
+    private SyncedRingbuffer<ActiveBuffer> alBufferPlaying = null;
+    private int alBufferBytesQueued = 0;
+
+    private int[] alSource = null;
+    private AudioDataFormat chosenFormat;
+    private int alFormat;    
+    private boolean initialized;
+
     static {
-        
-        boolean joalFound = false;
+        ALC _alc = null;
+        AL _al = null;
         try {
-            Class.forName("com.jogamp.openal.ALFactory");
-            joalFound = true;
-        } catch(ClassNotFoundException e){
-            // Joal not found on classpath
-        }            
-            
-        if(joalFound) {
+            _alc = ALFactory.getALC();            
+            _al = ALFactory.getAL();
+        } catch(Throwable t) {
+            if( DEBUG ) {
+                System.err.println("ALAudioSink: Catched "+t.getClass().getName()+": "+t.getMessage());
+                t.printStackTrace();
+            }
+        }
+        alc = _alc;
+        al = _al;
+        staticAvailable = null != alc && null != al;
+    }
+    
+    public ALAudioSink() {
+        initialized = false;
+        chosenFormat = null;
         
-            alc = ALFactory.getALC();            
-            String deviceSpecifier;
-
+        if( !staticAvailable ) {
+            return;
+        }
+        
+        try {
             // Get handle to default device.
             device = alc.alcOpenDevice(null);
             if (device == null) {
-                throw new ALException("Error opening default OpenAL device");
+                throw new RuntimeException("ALAudioSink: Error opening default OpenAL device");
             }
         
             // Get the device specifier.
             deviceSpecifier = alc.alcGetString(device, ALC.ALC_DEVICE_SPECIFIER);
             if (deviceSpecifier == null) {
-                throw new ALException("Error getting specifier for default OpenAL device");
+                throw new RuntimeException("ALAudioSink: Error getting specifier for default OpenAL device");
             }
                 
             // Create audio context.
             context = alc.alcCreateContext(device, null);
             if (context == null) {
-                throw new ALException("Error creating OpenAL context");
+                throw new RuntimeException("ALAudioSink: Error creating OpenAL context");
             }
         
             // Set active context.
             alc.alcMakeContextCurrent(context);
         
             // Check for an error.
-            if (alc.alcGetError(device) != ALC.ALC_NO_ERROR) {
-                throw new ALException("Error making OpenAL context current");
+            if ( alc.alcGetError(device) != ALC.ALC_NO_ERROR ) {
+                throw new RuntimeException("ALAudioSink: Error making OpenAL context current");
             }
             
-            al = ALFactory.getAL();
-            
-            // Allocate buffers
-            al.alGenBuffers(NUM_BUFFERS, buffers, 0);                       
-            al.alGenSources(1, source, 0);
+            // Create source
+            {
+                alSource = new int[1];
+                al.alGenSources(1, alSource, 0);
+                final int err = al.alGetError();
+                if( err != AL.AL_NO_ERROR ) {
+                    alSource = null;
+                    throw new RuntimeException("ALAudioSink: Error generating Source: 0x"+Integer.toHexString(err));
+                }       
+            }
             
-            if(al.alGetError() != AL.AL_NO_ERROR) {
-                throw new ALException("Error generating :(");                 
-            }            
-        
-            System.out.println("OpenAL audio sink using device: " + deviceSpecifier);        
-            available = true;
+            if( DEBUG ) {                
+                System.err.println("ALAudioSink: Using device: " + deviceSpecifier);
+            }
+            initialized = true;
+            return;
+        } catch ( Exception e ) {
+            if( DEBUG ) {
+                System.err.println(e.getMessage());
+            }
+            destroy();
         }
     }
     
     @Override
-    public boolean isDataAvailable(int data_size) {               
-        return true;
+    public String toString() {
+        final int alSrcName = null != alSource ? alSource[0] : 0;
+        final int alBuffersLen = null != alBuffers ? alBuffers.length : 0;
+        return "ALAudioSink[init "+initialized+", device "+deviceSpecifier+", ctx "+context+", alSource "+alSrcName+
+               ", chosen "+chosenFormat+", alFormat "+toHexString(alFormat)+
+               ", buffers[total "+alBuffersLen+", avail "+alBufferAvail.size()+", "+alBufferPlaying.getFreeSlots()+
+               ", queued[bufferCount "+alBufferPlaying.size()+", "+getQueuedTime() + " ms, " + alBufferBytesQueued+" bytes]";
     }
     
     @Override
-    public void writeData(byte[] sampleData, int data_size) {
-        // OpenAL consumes buffers in the background
-        // we first need to initialize the OpenAL buffers then
-        // start continous playback.
-        alc.alcMakeContextCurrent(context);
-        if(initBuffer) {
-
-            ByteBuffer data = Buffers.newDirectByteBuffer(sampleData);
-            al.alBufferData(buffers[bufferNumber], format, data, data_size, frequency);
-            int error = al.alGetError();
-            if(error != AL.AL_NO_ERROR) {
-                System.out.println("bufferNumber"+bufferNumber+" Data "+sampleData+" size"+data_size);
-                throw new ALException("Error loading :( error code: " + error);                
+    public AudioDataFormat getPreferredFormat() {
+        return DefaultFormat;
+    }
+    
+    @Override
+    public AudioDataFormat initSink(AudioDataFormat requestedFormat, int bufferCount) {
+        if( !staticAvailable ) {
+            return null;
+        }
+        samplePeriod = 1.0f / requestedFormat.sampleRate;
+        bufferPeriod = samplePeriod * SAMPLES_PER_BUFFER;
+        switch( requestedFormat.channelCount ) {
+            case 1: { 
+                switch ( requestedFormat.sampleSize ) {
+                    case 8: 
+                        alFormat = AL.AL_FORMAT_MONO8; break;
+                    case 16:
+                        alFormat = AL.AL_FORMAT_MONO16; break;
+                    default:
+                        return null;
+                }
+            } break;
+            case 2: 
+                switch ( requestedFormat.sampleSize ) {
+                    case 8: 
+                        alFormat = AL.AL_FORMAT_STEREO8; break;
+                    case 16:
+                        alFormat = AL.AL_FORMAT_STEREO16; break;
+                    default:
+                        return null;
+                }
+        }
+        // Allocate buffers
+        destroyBuffers();
+        {
+            alBuffers = new int[bufferCount];
+            al.alGenBuffers(bufferCount, alBuffers, 0);
+            final int err = al.alGetError();
+            if( err != AL.AL_NO_ERROR ) {
+                alBuffers = null;
+                throw new RuntimeException("ALAudioSink: Error generating Buffers: 0x"+Integer.toHexString(err));
             }
-
-            if(bufferNumber==NUM_BUFFERS-1){
-                // all buffers queued
-                al.alSourceQueueBuffers(source[0], NUM_BUFFERS, buffers, 0);
-                // start playback
-                al.alSourcePlay(source[0]);
-                if(al.alGetError() != AL.AL_NO_ERROR) {
-                    throw new ALException("Error starting :(");                 
+            final Integer[] alBufferRingArray = new Integer[bufferCount];
+            for(int i=0; i<bufferCount; i++) {
+                alBufferRingArray[i] = Integer.valueOf(alBuffers[i]);
+            }
+            alBufferAvail = new SyncedRingbuffer<Integer>(alBufferRingArray, true /* full */);
+            alBufferPlaying = new SyncedRingbuffer<ActiveBuffer>(new ActiveBuffer[bufferCount], false /* full */);
+        }
+        
+        
+        chosenFormat = requestedFormat;
+        return chosenFormat;
+    }
+    
+    private void destroyBuffers() {
+        if( !staticAvailable ) {
+            return;
+        }
+        if( null != alBuffers ) {
+            try {
+                al.alDeleteBuffers(alBufferAvail.capacity(), alBuffers, 0);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
                 }
-                initBuffer=false;
             }
-
-            // update buffer number to fill
-            bufferNumber=(bufferNumber+1)%NUM_BUFFERS;
-        } else {
-            // OpenAL is playing in the background.
-            // one new frame with audio data is ready
-
-            // first wait for openal to release one buffer
-            int[] buffer=new int[1];
-            int[] val=new int[1];
-            do {
-                al.alGetSourcei(source[0], AL.AL_BUFFERS_PROCESSED, val, 0);
-                if(val[0] <= 0){
-                    try {
-                        Thread.sleep(1);
-                    } catch (InterruptedException e){
-                    }
+            alBufferAvail.clear(true);
+            alBufferAvail = null;
+            alBufferPlaying.clear(true);
+            alBufferPlaying = null;
+            alBufferBytesQueued = 0;
+            alBuffers = null;
+        }
+    }
+    
+    @Override
+    public void destroy() {
+        initialized = false;
+        if( !staticAvailable ) {
+            return;
+        }
+        if( null != alSource ) {
+            try {
+                al.alDeleteSources(1, alSource, 0);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
                 }
-            } while (val[0] <= 0);
-
-            // fill and requeue the empty buffer
-            al.alSourceUnqueueBuffers(source[0], 1, buffer , 0);
-            Buffer data = Buffers.newDirectByteBuffer(sampleData);
-            al.alBufferData(buffer[0], format, data, data_size, frequency);
-            al.alSourceQueueBuffers(source[0], 1, buffer, 0);
-            if(al.alGetError() != AL.AL_NO_ERROR) {
-                throw new ALException("Error buffering :(");                 
             }
+            alSource = null;
+        }
+        
+        destroyBuffers();
 
-            // Restart openal playback if needed
-            al.alGetSourcei(source[0], AL.AL_SOURCE_STATE, val, 0);
-            if(val[0] != al.AL_PLAYING) {
-                al.alSourcePlay(source[0]);
+        if( null != context ) {
+            try {
+                alc.alcDestroyContext(context);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
+                }
+            }
+            context = null;            
+        }
+        if( null != device ) {
+            try {
+                alc.alcCloseDevice(device);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
+                }
             }
+            device = null;            
         }
+        chosenFormat = null;
+    }
+    
+    @Override
+    public boolean isInitialized() {
+        return initialized;
     }
+    
+    private final void dequeueBuffer(boolean wait) {
+        int alErr = AL.AL_NO_ERROR;
+        final int[] val=new int[1];
+        do {
+            al.alGetSourcei(alSource[0], AL.AL_BUFFERS_PROCESSED, val, 0);
+            alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException("ALError "+toHexString(alErr)+" while quering processed buffers at source. "+this);                 
+            }
+            if( wait && val[0] <= 0 ) {
+                try {
+                    Thread.sleep(1);
+                } catch (InterruptedException e){
+                }
+            }
+        } while (val[0] <= 0);
+        final int processedBuffers = val[0];
 
+        if( processedBuffers > 0 ) {
+            int[] buffers=new int[processedBuffers];
+            al.alSourceUnqueueBuffers(alSource[0], processedBuffers, buffers, 0);
+            alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException("ALError "+toHexString(alErr)+" while dequeueing "+processedBuffers+" processed buffers. "+this);                 
+            }
+            for ( int i=0; i<processedBuffers; i++ ) {
+                final ActiveBuffer releasedBuffer = alBufferPlaying.get(true /* clearRef */);
+                if( null == releasedBuffer ) {
+                    throw new InternalError("Internal Error: "+this);
+                }
+                if( releasedBuffer.name.intValue() != buffers[i] ) {                    
+                    throw new InternalError("Buffer name mismatch: dequeued: "+buffers[i]+", released "+releasedBuffer);
+                    // System.err.println("XXX ["+i+"]: dequeued: "+buffers[i]+", released "+releasedBuffer);
+                }
+                alBufferBytesQueued -= releasedBuffer.size;
+                if( !alBufferAvail.put(releasedBuffer.name) ) {
+                    throw new InternalError("Internal Error: "+this);
+                }
+                if( DEBUG ) {
+                    System.err.println("ALAudioSink: Dequeued "+processedBuffers+", wait "+wait+", "+this);
+                }                
+            }
+        }
+    }
+    
+    private static final String toHexString(int v) {
+        return "0x"+Integer.toHexString(v);
+    }
+        
     @Override
-    public int getDataAvailable() {
-        int[] val=new int[1];       
-        al.alGetSourcei(source[0], AL.AL_BUFFERS_PROCESSED, val, 0);
-        return (NUM_BUFFERS-val[0])*4096;
+    public void writeData(AudioFrame audioFrame) {
+        if( !initialized || null == chosenFormat ) {
+            return;
+        }
+        int alErr = AL.AL_NO_ERROR;
+            
+        // OpenAL consumes buffers in the background
+        // we first need to initialize the OpenAL buffers then
+        // start continuous playback.
+        alc.alcMakeContextCurrent(context);
+        alErr = al.alGetError();
+        if(al.alGetError() != AL.AL_NO_ERROR) {
+            throw new RuntimeException("ALError "+toHexString(alErr)+" while makeCurrent. "+this);
+        }
+        
+        if( alBufferAvail.isEmpty() ) {
+            dequeueBuffer(true);
+        }
+        
+        final Integer alBufferName = alBufferAvail.get(true /* clearRef */);
+        if( null == alBufferName ) {
+            throw new InternalError("Internal Error: "+this);
+        }
+        if( !alBufferPlaying.put( new ActiveBuffer(alBufferName, audioFrame.dataSize) ) ) {
+            throw new InternalError("Internal Error: "+this);
+        }
+        al.alBufferData(alBufferName.intValue(), alFormat, audioFrame.data, audioFrame.dataSize, chosenFormat.sampleRate);
+        final int[] alBufferNames = new int[] { alBufferName.intValue() };
+        al.alSourceQueueBuffers(alSource[0], 1, alBufferNames, 0);
+        alErr = al.alGetError();
+        if(al.alGetError() != AL.AL_NO_ERROR) {
+            throw new RuntimeException("ALError "+toHexString(alErr)+" while queueing buffer "+toHexString(alBufferNames[0])+". "+this);
+        }
+        alBufferBytesQueued += audioFrame.dataSize;
+        
+        // Restart openal playback if needed
+        {
+            int[] val = new int[1];
+            al.alGetSourcei(alSource[0], AL.AL_SOURCE_STATE, val, 0);
+            if(val[0] != AL.AL_PLAYING) {
+                if( DEBUG ) {
+                    System.err.println("ALAudioSink: Start playing: "+this);
+                }
+                al.alSourcePlay(alSource[0]);
+                alErr = al.alGetError();
+                if(al.alGetError() != AL.AL_NO_ERROR) {
+                    throw new RuntimeException("ALError "+toHexString(alErr)+" while start playing. "+this);
+                }
+            }
+        }
     }
 
     @Override
-    public boolean isAudioSinkAvailable() {
-        return available;
+    public int getQueuedByteCount() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return alBufferBytesQueued;
+    }
+    
+    @Override
+    public int getQueuedTime() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        final int bps = chosenFormat.sampleSize / 8;
+        return alBufferBytesQueued / ( chosenFormat.channelCount * bps * ( chosenFormat.sampleRate / 1000 ) );
     }
+    
+    @Override
+    public int getWritableBufferCount() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return alBufferPlaying.getFreeSlots();
+    }
+    
+    @Override
+    public boolean isDataAvailable(int data_size) {               
+        return initialized && null != chosenFormat;
+    }
+    
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/AudioSink.java b/src/jogl/classes/jogamp/opengl/util/av/AudioSink.java
deleted file mode 100644
index 504e4b2db..000000000
--- a/src/jogl/classes/jogamp/opengl/util/av/AudioSink.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package jogamp.opengl.util.av;
-
-public interface AudioSink {
-
-    boolean isAudioSinkAvailable();
-    
-    int getDataAvailable();
-
-    boolean isDataAvailable(int data_size);
-
-    void writeData(byte[] sampleData, int data_size);
-    
-}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
index 27c926704..2ff91a3f6 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
@@ -72,7 +72,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     
     protected URLConnection urlConn = null;
     
-    protected float playSpeed = 1.0f;
+    protected volatile float playSpeed = 1.0f;
     
     /** Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
     protected int width = 0;
@@ -215,7 +215,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     }
     
     @Override
-    public final synchronized float getPlaySpeed() {
+    public final float getPlaySpeed() {
         return playSpeed;
     }
     
diff --git a/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java b/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java
index 653a02111..a5fedce59 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java
@@ -2,39 +2,67 @@ package jogamp.opengl.util.av;
 
 import java.util.Arrays;
 
-import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioSystem;
 import javax.sound.sampled.DataLine;
 import javax.sound.sampled.SourceDataLine;
 
-public class JavaSoundAudioSink implements AudioSink {
+import com.jogamp.opengl.util.av.AudioSink;
 
-    // AudioFormat parameters
-    public  static final int     SAMPLE_RATE = 44100;
-    private static final int     SAMPLE_SIZE = 16;
-    private static final int     CHANNELS = 2;
-    private static final boolean SIGNED = true;
-    private static final boolean BIG_ENDIAN = false;
+/***
+ * JavaSound Audio Sink
+ * <p>
+ * FIXME: Parameterize .. all configs .. best via an init-method, passing requested
+ * audio capabilities
+ * </p>
+ */
+public class JavaSoundAudioSink implements AudioSink {
 
     // Chunk of audio processed at one time
     public static final int BUFFER_SIZE = 1000;
     public static final int SAMPLES_PER_BUFFER = BUFFER_SIZE / 2;
+    private static final boolean staticAvailable;
     
     // Sample time values
-    public static final double SAMPLE_TIME_IN_SECS = 1.0 / SAMPLE_RATE;
-    public static final double BUFFER_TIME_IN_SECS = SAMPLE_TIME_IN_SECS * SAMPLES_PER_BUFFER;
+    // public static final double SAMPLE_TIME_IN_SECS = 1.0 / DEFAULT_SAMPLE_RATE;
+    // public static final double BUFFER_TIME_IN_SECS = SAMPLE_TIME_IN_SECS * SAMPLES_PER_BUFFER;
     
-    private static AudioFormat format;
-    private static DataLine.Info info;
-    private static SourceDataLine auline;
-    private static int bufferCount;
-    private static byte [] sampleData = new byte[BUFFER_SIZE];  
-    
-    private static boolean available;
+    private javax.sound.sampled.AudioFormat format;
+    private DataLine.Info info;
+    private SourceDataLine auline;
+    private int bufferCount;
+    private byte [] sampleData = new byte[BUFFER_SIZE];  
+    private boolean initialized = false;
+    private AudioDataFormat chosenFormat = null;
     
     static {
-     // Create the audio format we wish to use
-        format = new AudioFormat(SAMPLE_RATE, SAMPLE_SIZE, CHANNELS, SIGNED, BIG_ENDIAN);
+        boolean ok = false;
+        try {
+            AudioSystem.getAudioFileTypes();
+            ok = true;
+        } catch (Throwable t) {
+            
+        }
+        staticAvailable=ok;
+    }   
+    
+    @Override
+    public String toString() {
+        return "JavaSoundSink[init "+initialized+", dataLine "+info+", source "+auline+", bufferCount "+bufferCount+
+               ", chosen "+chosenFormat+", jsFormat "+format;
+    }
+    
+    @Override
+    public AudioDataFormat getPreferredFormat() {
+        return DefaultFormat;
+    }
+    
+    @Override
+    public AudioDataFormat initSink(AudioDataFormat requestedFormat, int bufferCount) {
+        if( !staticAvailable ) {
+            return null;
+        }
+        // Create the audio format we wish to use
+        format = new javax.sound.sampled.AudioFormat(requestedFormat.sampleRate, requestedFormat.sampleSize, requestedFormat.channelCount, requestedFormat.signed, !requestedFormat.littleEndian);
 
         // Create dataline info object describing line format
         info = new DataLine.Info(SourceDataLine.class, format);
@@ -47,33 +75,61 @@ public class JavaSoundAudioSink implements AudioSink {
             auline.open(format);
             auline.start();
             System.out.println("JavaSound audio sink");
-            available=true;
+            initialized=true;
+            chosenFormat = requestedFormat;
         } catch (Exception e) {
-            available=false;
+            initialized=false;
         }
-    }   
+        return chosenFormat;
+    }
     
-    public void writeData(byte[] sampleData, int data_size) {
-         int written = 0;
-         int len;
-         while (data_size > 0) {
-            len = auline.write(sampleData, written, data_size);
+    @Override
+    public boolean isInitialized() {
+        return initialized;
+    }
+
+    @Override
+    public void destroy() {
+        initialized = false;
+        chosenFormat = null;
+        // FIXEM: complete code!
+    }
+    
+    public void writeData(AudioFrame audioFrame) {
+        int data_size = audioFrame.dataSize;
+        final byte[] lala = new byte[data_size];
+        final int p = audioFrame.data.position();
+        audioFrame.data.get(lala, 0, data_size);
+        audioFrame.data.position(p);
+        
+        int written = 0;
+        int len;
+        while (data_size > 0) {
+            // Nope: We don't make compromises for this crappy API !
+            len = auline.write(lala, written, data_size);
             data_size -= len;
             written += len;
         }        
     }
 
-    public int getDataAvailable() {
+    @Override
+    public int getQueuedByteCount() {
         return auline.available();
     }
     
-    public boolean isDataAvailable(int data_size) {
-        return auline.available()>=data_size;
+    @Override
+    public int getQueuedTime() {
+        return 0; // FIXME
     }
 
+    
     @Override
-    public boolean isAudioSinkAvailable() {
-        return available;
+    public int getWritableBufferCount() {
+        return 1;
+    }
+    
+    public boolean isDataAvailable(int data_size) {
+        return auline.available()>=data_size;
     }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java b/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java
index d92967849..cef1c3361 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java
@@ -1,23 +1,50 @@
 package jogamp.opengl.util.av;
 
+
+import com.jogamp.opengl.util.av.AudioSink;
+
 public class NullAudioSink implements AudioSink {
 
     @Override
-    public int getDataAvailable() {
-        return 0;
+    public boolean isInitialized() {
+        return true;
     }
 
     @Override
-    public boolean isDataAvailable(int data_size) {
-        return false;
+    public AudioDataFormat getPreferredFormat() {
+        return DefaultFormat;
+    }
+
+    @Override
+    public AudioDataFormat initSink(AudioDataFormat requestedFormat, int bufferCount) {
+        return requestedFormat;
+    }
+    
+    @Override
+    public void destroy() {
+    }
+    
+    @Override
+    public int getQueuedByteCount() {
+        return 0;
+    }
+    
+    @Override
+    public int getQueuedTime() {
+        return 0;
     }
 
     @Override
-    public void writeData(byte[] sampleData, int data_size) {
+    public int getWritableBufferCount() {
+        return 1;        
+    }
+    
+    @Override
+    public boolean isDataAvailable(int data_size) {
+        return false;
     }
 
     @Override
-    public boolean isAudioSinkAvailable() {
-        return true;
+    public void writeData(AudioFrame audioFrame) {
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/SyncedRingbuffer.java b/src/jogl/classes/jogamp/opengl/util/av/SyncedRingbuffer.java
new file mode 100644
index 000000000..5f5d69cf8
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/SyncedRingbuffer.java
@@ -0,0 +1,286 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl.util.av;
+
+/** 
+ * Simple synchronized ring buffer implementation.
+ * <p>
+ * Caller can chose whether to block until get / put is able to proceed or not.
+ * </p>
+ * <p>
+ * Caller can chose whether to pass an empty array and clear references at get,
+ * or using a preset array for circular access of same objects.
+ * </p>
+ * <p>
+ * Circular write position is equal to the read position if buffer is full or if buffer is empty. 
+ * </p>
+ */
+public class SyncedRingbuffer<T> {
+
+    protected final Object sync = new Object();
+    protected final T[] array;
+    protected final int capacity;
+    protected int readPos;
+    protected int writePos;
+    protected int size;
+    
+    public final String toString() {
+        return "SyncedRingbuffer<?>[filled "+size+" / "+capacity+", writePos "+writePos+", readPos "+readPos+"]";
+    }
+    
+    /** 
+     * Create instance w/ the given array and it's capacity, e.g.:
+     * <pre>
+     *      SyncedRingbuffer r = new SyncedRingbuffer<Integer>(new Integer[10]);
+     * </pre>
+     * <p>
+     * The array may either be clear, or preset w/ elements!
+     * </p>
+     * @param full if true, given array is assumed to be full, i.e. {@link #isFull()} will return true.
+     * @param array
+     */
+    public SyncedRingbuffer(T[] array, boolean full) {
+        this.array = array;
+        this.capacity = array.length;
+        clearImpl(false);
+        if(full) {
+            size = capacity;
+        }
+    }
+    
+    public final int capacity() {
+        return capacity;
+    }
+    
+    /**
+     * Resets all ring buffer pointer to zero.
+     * <p>
+     * {@link #isEmpty()} will return <code>true</code> after calling this method.
+     * </p>
+     * <p>
+     * If <code>clearRefs</code> is true, all ring buffer slots will be set to <code>null</code>.
+     * </p>
+     * @param clearRefs if true, all ring buffer slots will be flushed, otherwise they remain intact.
+     */
+    public final void clear(boolean clearRefs) {
+        synchronized ( sync ) {
+            clearImpl(clearRefs);
+        }
+    }
+    
+    private final void clearImpl(boolean clearRefs) {
+        readPos = 0;
+        writePos = 0;
+        size = 0;
+        if( clearRefs ) {
+            for(int i=0; i<capacity; i++) {
+                this.array[i] = null;
+            }
+        }
+    }
+    
+    /** Returns the number of elements in this ring buffer. */
+    public final int size() {
+        synchronized ( sync ) {
+            return size;
+        }
+    }
+    
+    /** Returns the number of free slots available to put.  */
+    public final int getFreeSlots() {
+        synchronized ( sync ) {
+            return capacity - size;
+        }
+    }
+
+    /** Returns true if this ring buffer is empty, otherwise false. */
+    public final boolean isEmpty() {
+        synchronized ( sync ) {
+            return 0 == size;
+        }
+    }
+    
+    /** Returns true if this ring buffer is full, otherwise false. */
+    public final boolean isFull() {
+        synchronized ( sync ) {
+            return capacity == size;
+        }
+    }
+    
+    /**
+     * Returns the oldest put element if available, otherwise null.
+     * <p>
+     * Impl. returns the element at the current read position
+     * and advances the read position - if available.
+     * </p>
+     * <p>
+     * If <code>clearRef</code> is true, the returned ring buffer slot will be set to <code>null</code>.
+     * </p>
+     * <p>
+     * Method is non blocking and returns immediately;.
+     * </p>
+     * @param clearRef if true, the returned ring buffer slot will be flushed, otherwise it remains intact.
+     * @return the oldest put element if available, otherwise null.  
+     */
+    public final T get(boolean clearRef) {
+        try {
+            return getImpl(clearRef, false, false);
+        } catch (InterruptedException ie) { throw new RuntimeException(ie); }
+    }
+
+    /**
+     * Returns the oldest put element.
+     * <p>
+     * Impl. returns the element at the current read position
+     * and advances the read position.
+     * </p>
+     * <p>
+     * If <code>clearRef</code> is true, the returned ring buffer slot will be set to <code>null</code>.
+     * </p>
+     * <p>
+     * Methods blocks until an element becomes available via put.
+     * </p>
+     * @param clearRef if true, the returned ring buffer slot will be flushed, otherwise it remains intact.
+     * @return the oldest put element  
+     * @throws InterruptedException 
+     */
+    public final T getBlocking(boolean clearRef) throws InterruptedException {
+        return getImpl(clearRef, true, false);
+    }
+    
+    public final T peek() throws InterruptedException {
+        return getImpl(false, false, true);
+    }
+    public final T peekBlocking() throws InterruptedException {
+        return getImpl(false, true, true);
+    }
+    
+    private final T getImpl(boolean clearRef, boolean blocking, boolean peek) throws InterruptedException {
+        synchronized ( sync ) {
+            if( 0 == size ) {
+                if( blocking ) {
+                    while( 0 == size ) {
+                        sync.wait();
+                    }
+                } else {
+                    return null;
+                }
+            }
+            final T r = array[readPos];
+            if( !peek ) {
+                if( clearRef ) {
+                    array[readPos] = null;
+                }
+                readPos = (readPos + 1) % capacity;
+                size--;
+                sync.notifyAll(); // notify waiting putter
+            }
+            return r;
+        }
+    }
+    
+    /** 
+     * Puts the element <code>e</code> at the current write position
+     * and advances the write position.
+     * <p>
+     * Returns true if successful, otherwise false in case buffer is full.
+     * </p>
+     * <p>
+     * Method is non blocking and returns immediately;.
+     * </p>
+     */
+    public final boolean put(T e) {
+        try {
+            return putImpl(e, false, false);
+        } catch (InterruptedException ie) { throw new RuntimeException(ie); }
+    }
+    
+    /** 
+     * Puts the element <code>e</code> at the current write position
+     * and advances the write position.
+     * <p>
+     * Method blocks until a free slot becomes available via get.
+     * </p>
+     * @throws InterruptedException 
+     */
+    public final void putBlocking(T e) throws InterruptedException {
+        if( !putImpl(e, false, true) ) {
+            throw new InternalError("Blocking put failed: "+this);
+        }
+    }
+    
+    /** 
+     * Keeps the element at the current write position intact
+     * and advances the write position. 
+     * <p>
+     * Returns true if successful, otherwise false in case buffer is full.
+     * </p>
+     * <p>
+     * If <code>blocking</code> is true, method blocks until a free slot becomes available via get.
+     * </p>
+     * @param blocking if true, wait until a free slot becomes available via get.
+     * @throws InterruptedException 
+     */
+    public final boolean putSame(boolean blocking) throws InterruptedException {
+        return putImpl(null, true, blocking);
+    }
+    
+    private final boolean putImpl(T e, boolean sameRef, boolean blocking) throws InterruptedException {
+        synchronized ( sync ) {
+            if( capacity <= size ) {
+                if( blocking ) {
+                    while( capacity <= size ) {
+                        sync.wait();
+                    }
+                } else { 
+                    return false;
+                }
+            }
+            if( !sameRef ) {
+                array[ writePos ] = e;
+            }
+            writePos = (writePos + 1) % capacity;
+            size++;
+            sync.notifyAll(); // notify waiting getter
+            return true;
+        }
+    }
+    
+    public final void waitForFreeSlots(int count) throws InterruptedException {
+        synchronized ( sync ) {
+            if( capacity - size < count ) {
+                while( capacity - size < count ) {
+                    System.err.println("XXXX AAA XXX");
+                    sync.wait();
+                }
+            }
+        }
+    }
+    
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
index 33b5b3b20..65b867ba1 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
@@ -38,20 +38,17 @@ import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 import javax.media.opengl.GLException;
 
-import java.util.Arrays;
-import java.util.Queue;
-
-import com.jogamp.common.util.ReflectionUtil;
 import com.jogamp.common.util.VersionNumber;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.opengl.util.GLPixelStorageModes;
-import com.jogamp.opengl.util.av.GLMediaPlayerFactory;
+import com.jogamp.opengl.util.av.AudioSink;
+import com.jogamp.opengl.util.av.AudioSinkFactory;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureSequence;
 
 import jogamp.opengl.GLContextImpl;
-import jogamp.opengl.util.av.AudioSink;
 import jogamp.opengl.util.av.EGLMediaPlayerImpl;
+import jogamp.opengl.util.av.SyncedRingbuffer;
 
 /***
  * Implementation utilizes <a href="http://libav.org/">Libav</a>
@@ -111,13 +108,10 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
     private static final int TEMP_BUFFER_COUNT = 20;
 
     // Instance data
-    private static AudioSink audioSink;
-    private static int maxAvailableAudio;
-
     public static final VersionNumber avUtilVersion;
     public static final VersionNumber avFormatVersion;
     public static final VersionNumber avCodecVersion;    
-    static boolean available;
+    static final boolean available;
     
     static {
         if(FFMPEGDynamicLibraryBundleInfo.initSingleton()) {
@@ -129,24 +123,6 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
             System.err.println("LIB_AV Codec : "+avCodecVersion);
             initIDs0();            
             available = true;
-            final ClassLoader cl = GLMediaPlayerFactory.class.getClassLoader();
-            
-            if(ReflectionUtil.isClassAvailable("com.jogamp.openal.ALFactory", cl)){
-              // Only instance ALAudioSink if JOAL is found on the classpath.
-              audioSink = (AudioSink) ReflectionUtil.createInstance("jogamp.opengl.openal.av.ALAudioSink", cl);
-              if(!audioSink.isAudioSinkAvailable()){
-            	  // Failed to initialize OpenAL.
-            	  audioSink=null;
-              }
-            }
-            if(audioSink==null) {
-                audioSink = (AudioSink) ReflectionUtil.createInstance("jogamp.opengl.util.av.JavaSoundAudioSink", cl);
-                if(!audioSink.isAudioSinkAvailable()) {
-                    audioSink = (AudioSink) ReflectionUtil.createInstance("jogamp.opengl.util.av.NullAudioSink", cl);
-                }
-            }
-            maxAvailableAudio = audioSink.getDataAvailable();
-
         } else {
             avUtilVersion = null;
             avFormatVersion = null;
@@ -163,6 +139,10 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
                                   ( vers >>  0 ) & 0xFF );
     }
     
+    //
+    // Video
+    //
+    
     protected long moviePtr = 0;    
     protected long procAddrGLTexSubImage2D = 0;
     protected EGLMediaPlayerImpl.EGLTextureFrame lastTex = null;
@@ -176,17 +156,29 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
     protected int texWidth, texHeight; // overall (stuffing planes in one texture)
     protected ByteBuffer texCopy;
 
+    //
+    // Audio
+    //
+    
+    protected final int AudioFrameCount = 8;        
+    protected final AudioSink audioSink;    
+    protected final int maxAvailableAudio;
+    protected AudioSink.AudioDataFormat chosenAudioFormat; 
+    protected final SyncedRingbuffer<AudioSink.AudioFrame> audioFramesBuffer = new SyncedRingbuffer<AudioSink.AudioFrame>(new AudioSink.AudioFrame[AudioFrameCount], false /* full */);
+    
     public FFMPEGMediaPlayer() {
         super(TextureType.GL, false);
         if(!available) {
             throw new RuntimeException("FFMPEGMediaPlayer not available");
         }
         setTextureCount(1);
-        moviePtr = createInstance0(true);
+        moviePtr = createInstance0(DEBUG);
         if(0==moviePtr) {
             throw new GLException("Couldn't create FFMPEGInstance");
         }
         psm = new GLPixelStorageModes();
+        audioSink = AudioSinkFactory.createDefault(); 
+        maxAvailableAudio = audioSink.getQueuedByteCount();
     }
     
     @Override
@@ -221,9 +213,11 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         }
         final String urlS=urlConn.getURL().toExternalForm();
     
-        System.out.println("setURL: p1 "+this);
-        setStream0(moviePtr, urlS, -1, -1);
-        System.out.println("setURL: p2 "+this);
+        chosenAudioFormat = audioSink.initSink(audioSink.getPreferredFormat(), AudioFrameCount);
+        System.err.println("setURL: p1 "+this);
+        setStream0(moviePtr, urlS, -1, -1, AudioFrameCount);
+        System.err.println("setURL: p2 "+this);
+        
         int tf, tif=GL.GL_RGBA; // texture format and internal format
         switch(vBytesPerPixelPerPlane) {
             case 1:
@@ -264,74 +258,103 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
     }
 
 
-    private class AudioFrame {
-        final byte[] sampleData; 
-        final int data_size;
-        final int audio_pts;
-        AudioFrame(byte[] sampleData, int data_size, int audio_pts) {
-            this.sampleData=sampleData;
-            this.data_size=data_size;
-            this.audio_pts=audio_pts;
+    private final void pushSound(ByteBuffer sampleData, int data_size, int audio_pts) {
+        if( audioPusher != null && audioPusher.isRunning() ) {
+            try {
+                audioFramesBuffer.putBlocking(new AudioSink.AudioFrame(sampleData, data_size, audio_pts));
+            } catch (InterruptedException e) {
+                e.printStackTrace(); // oops
+            }
+            if( null != audioPusher ) {
+                audioPusher.pushOne();
+            }
         }
     }
 
-    static final Queue<AudioFrame> audioFrameBuffer = new java.util.LinkedList<AudioFrame>(); 
-
-    private void updateSound(byte[] sampleData, int data_size, int audio_pts) {
-/*
-        // Visualize incomming data
-        int c=0; 
-        for(byte b: sampleData){
-            if(b<0) {
-                System.out.print(" ");
-            } else if(b<64) {
-                System.out.print("_");
-            } else if(b < 128) {
-                System.out.print("-");
-            } else if(b == 128) {
-                System.out.print("=");
-            } else if(b < 256-64) {
-                System.out.print("\"");
-            } else {
-                System.out.print("'");
+    class AudioPusher extends Thread {
+        volatile boolean shallStop = false;
+        volatile boolean isBlocked = false;
+        
+        AudioPusher() {
+            setDaemon(true);
+        }
+        public void requestStop() {
+            shallStop = true;
+            if( isBlocked ) {
+                // interrupt();
             }
-                        
-            c++;
-            if(c>=40)
-                break;                   
         }
-        System.out.println("jA");
-*/
-
-        //TODO reduce GC
-        audioFrameBuffer.add(new AudioFrame(sampleData, data_size, audio_pts));
-        pumpAudio();
-    }
-
-    private void pumpAudio() {
-        if(audioSink.getDataAvailable()==maxAvailableAudio){
-           System.out.println("warning: audio buffer underrun");
+        public boolean isRunning() { return !shallStop; }
+        
+        public void run() {
+            setName(getName()+"-AudioPusher_"+AudioPusherInstanceId);
+            AudioPusherInstanceId++;
+            
+            while( !shallStop ){
+                pushOne();
+            }
         }
-        while(audioFrameBuffer.peek()!=null){
-            AudioFrame a = audioFrameBuffer.peek();
-
-            // poor mans audio sync .. TODO: off thread
-            final long now = System.currentTimeMillis();
-            final long now_d = now - lastAudioTime;
-            final long pts_d = a.audio_pts - lastAudioPTS;
-            final long dt = (long) ( (float) ( pts_d - now_d ) / getPlaySpeed() ) ;
-           
-            System.err.println("s: pts-a "+a.audio_pts+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt); 
-            lastAudioTime = now;
-            if( (dt<audio_dt_d  ) && audioSink.isDataAvailable(a.data_size)) {
-                audioFrameBuffer.poll(); /* remove first item from the queue */
-                audioSink.writeData(a.sampleData, a.data_size);                
-                lastAudioPTS=a.audio_pts; 
-            } else {
-                break;
+        public void pushOne() {
+            final AudioSink.AudioFrame audioFrame;
+            try {
+                isBlocked = true;
+                audioFrame = audioFramesBuffer.getBlocking(true /* clearRef */);
+            } catch (InterruptedException e) {
+                if( !shallStop ) {
+                    e.printStackTrace(); // oops
+                }
+                shallStop = true;
+                return;
+            }
+            isBlocked = false;
+            
+            if( null != audioFrame ) {  
+                // poor mans audio sync ..
+                final long now = System.currentTimeMillis();
+                final long now_d = now - lastAudioTime;
+                final long pts_d = audioFrame.audioPTS - lastAudioPTS;
+                final long dt = (long) ( (float) ( pts_d - now_d ) / getPlaySpeed() ) ;
+                final boolean sleep = dt > audio_dt_d && !shallStop;
+                final long sleepP = dt - ( audio_dt_d / 2 );
+                if(DEBUG) {
+                    final int qAT = audioSink.getQueuedTime();
+                    System.err.println("s: pts-a "+audioFrame.audioPTS+", qAT "+qAT+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt+", sleep "+sleep+", sleepP "+sleepP+" ms");
+                }
+                if( sleep ) {
+                    try {
+                        isBlocked = true;
+                        Thread.sleep( sleepP );
+                    } catch (InterruptedException e) {
+                        e.printStackTrace(); // oops
+                    }
+                    isBlocked = false;
+                    lastAudioTime = System.currentTimeMillis();
+                } else {
+                    lastAudioTime = now;
+                }
+                if( !shallStop && audioSink.isDataAvailable(audioFrame.dataSize) ) {
+                    audioSink.writeData(audioFrame);
+                    lastAudioPTS=audioFrame.audioPTS;
+                }
             }
         }
     }
+    
+    static int AudioPusherInstanceId = 0;    
+    private AudioPusher audioPusher = null;
+    
+    private final void stopAudioPusher() {
+        if( null != audioPusher ) {
+            audioPusher.requestStop();
+            audioPusher = null;
+        }
+        audioFramesBuffer.clear(true);
+    }
+    private final void startAudioPusher() {
+        stopAudioPusher();
+        audioPusher = new AudioPusher();
+        // audioPusher.start();
+    }
 
     private void updateAttributes2(int pixFmt, int planes, int bitsPerPixel, int bytesPerPixelPerPlane,
                                    int lSz0, int lSz1, int lSz2,
@@ -448,6 +471,7 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         if(0==moviePtr) {
             return false;
         }
+        startAudioPusher();
         return true;
     }
 
@@ -457,6 +481,7 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         if(0==moviePtr) {
             return false;
         }
+        stopAudioPusher();
         return true;
     }
 
@@ -466,6 +491,7 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         if(0==moviePtr) {
             return false;
         }
+        stopAudioPusher();
         return true;
     }
 
@@ -475,12 +501,13 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         if(0==moviePtr) {
             throw new GLException("FFMPEG native instance null");
         }
+        stopAudioPusher();
         int pts0 = getVideoPTS0(moviePtr);
         int pts1 = seek0(moviePtr, msec);
         System.err.println("Seek: "+pts0+" -> "+msec+" : "+pts1);
-        audioFrameBuffer.clear();
         lastAudioPTS=pts1;
         lastVideoPTS=pts1;
+        startAudioPusher();
         return pts1;
     }
 
@@ -509,6 +536,12 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
                 tex.enable(gl);
                 tex.bind(gl);
 
+                try {
+                    audioFramesBuffer.waitForFreeSlots(2);
+                } catch (InterruptedException e) {
+                    e.printStackTrace(); // oops
+                }
+
                 /* try decode 10 packets to find one containing video
                    (res == 2) */
                 int res = 0;
@@ -529,27 +562,27 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
                 final long pts_d = pts - lastAudioPTS - 444; /* hack 444 == play video 444ms ahead of audio */
                 final long dt = Math.min(47, (long) ( (float) ( pts_d - now_d ) / getPlaySpeed() ) ) ;
                 //final long dt = (long) ( (float) ( pts_d - now_d ) / getPlaySpeed() ) ;
-                lastVideoTime = now;
-                System.err.println("s: pts-v "+pts+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt);
-                
-                if(dt>video_dt_d && dt<1000 && audioSink.getDataAvailable()<maxAvailableAudio-10000) {
+                final boolean sleep = dt>video_dt_d && dt<1000 && audioSink.getQueuedByteCount()<maxAvailableAudio-10000;
+                final long sleepP = dt-video_dt_d;
+                if(DEBUG) {
+                    final int qAT = audioSink.getQueuedTime();
+                    System.err.println("s: pts-v "+pts+", qAT "+qAT+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt+", sleep "+sleep+", sleepP "+sleepP+" ms");
+                }
+                // ?? Maybe use audioSink.getQueuedTime();
+                if( sleep ) {
                     try {
-                        Thread.sleep(dt-video_dt_d);
+                        Thread.sleep(sleepP);
                     } catch (InterruptedException e) { }
-                } /* else if(0>pts_d) {
-                    System.err.println("s: pts-v "+pts+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt);
-                } */
+                    lastVideoTime = System.currentTimeMillis();
+                } else { 
+                    lastVideoTime = now;
+                }
             }
-            pumpAudio();
             lastVideoPTS = pts;
         }
         return lastTex;
     }
     
-    private void consumeAudio(int len) {
-        
-    }
-    
     private static native int getAvUtilVersion0();
     private static native int getAvFormatVersion0();
     private static native int getAvCodecVersion0();
@@ -557,7 +590,7 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
     private native long createInstance0(boolean verbose);    
     private native void destroyInstance0(long moviePtr);
     
-    private native void setStream0(long moviePtr, String url, int vid, int aid);
+    private native void setStream0(long moviePtr, String url, int vid, int aid, int audioFrameCount);
 
     private native int getVideoPTS0(long moviePtr);    
     
diff --git a/src/jogl/native/libav/ffmpeg_tool.h b/src/jogl/native/libav/ffmpeg_tool.h
index 3181a8a8f..5560b8617 100644
--- a/src/jogl/native/libav/ffmpeg_tool.h
+++ b/src/jogl/native/libav/ffmpeg_tool.h
@@ -82,7 +82,9 @@ typedef struct {
     AVStream*        pAStream;
     AVCodecContext*  pACodecCtx;
     AVCodec*         pACodec;
-    AVFrame*         pAFrame;
+    AVFrame**        pAFrames;
+    int32_t          aFrameCount;
+    int32_t          aFrameCurrent;
     int32_t          aSampleRate;
     int32_t          aChannels;
     int32_t          aFrameSize;
diff --git a/src/jogl/native/libav/jogamp_opengl_util_av_impl_FFMPEGMediaPlayer.c b/src/jogl/native/libav/jogamp_opengl_util_av_impl_FFMPEGMediaPlayer.c
index d93caa30b..623bdcac7 100644
--- a/src/jogl/native/libav/jogamp_opengl_util_av_impl_FFMPEGMediaPlayer.c
+++ b/src/jogl/native/libav/jogamp_opengl_util_av_impl_FFMPEGMediaPlayer.c
@@ -38,7 +38,7 @@ typedef void (APIENTRYP PFNGLTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLi
 static const char * const ClazzNameFFMPEGMediaPlayer = "jogamp/opengl/util/av/impl/FFMPEGMediaPlayer";
 
 static jclass ffmpegMediaPlayerClazz = NULL;
-static jmethodID jni_mid_updateSound = NULL;
+static jmethodID jni_mid_pushSound = NULL;
 static jmethodID jni_mid_updateAttributes1 = NULL;
 static jmethodID jni_mid_updateAttributes2 = NULL;
 
@@ -192,41 +192,6 @@ JNIEXPORT jboolean JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGDynamicLibraryB
     return JNI_TRUE;
 }
 
-static void _updateSound(JNIEnv *env, jobject instance, int8_t *data, int32_t data_size, int32_t aPTS) {
-    if(NULL!=env) {
-        jbyteArray jbArray = (*env)->NewByteArray(env, data_size);
-        if (jbArray == NULL) {
-            fprintf(stderr, "FFMPEGMediaPlayer out of memory at native code _updateSound");
-            return; /* out of memory error thrown */
-        }
-
-/*
-        // Visualize sample waveform
-        int i;
-        for(i=0;i<40;i++){
-            int8_t b = data[i];
-            if(b<0) {
-                printf(" ");
-            } else if(b<64) {
-                printf("_");
-            } else if(b < 128) {
-                printf("-");
-            } else if(b == 128) {
-                printf("=");
-            } else if(b < 256-64) {
-                printf("\"");
-            } else {
-                printf("'");
-            }
-        }
-        printf("nA\n");
-*/
-
-        (*env)->SetByteArrayRegion(env, jbArray, 0, data_size, data);
-        (*env)->CallVoidMethod(env, instance, jni_mid_updateSound, jbArray, data_size, aPTS);
-    }
-}
-
 static void _updateJavaAttributes(JNIEnv *env, jobject instance, FFMPEGToolBasicAV_t* pAV)
 {
     // int shallBeDetached = 0;
@@ -277,9 +242,12 @@ static void freeInstance(FFMPEGToolBasicAV_t* pAV) {
             sp_av_free(pAV->pVFrame);
             pAV->pVFrame = NULL;
         }
-        if(NULL != pAV->pAFrame) {
-            sp_av_free(pAV->pAFrame);
-            pAV->pAFrame = NULL;
+        if(NULL != pAV->pAFrames) {
+            for(i=0; i<pAV->aFrameCount; i++) {
+                sp_av_free(pAV->pAFrames[i]);
+            }
+            free(pAV->pAFrames);
+            pAV->pAFrames = NULL;
         }
 
         // Close the video file
@@ -370,11 +338,11 @@ JNIEXPORT jboolean JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_ini
         JoglCommon_FatalError(env, "JOGL FFMPEG: can't use %s", ClazzNameFFMPEGMediaPlayer);
     }
 
-    jni_mid_updateSound = (*env)->GetMethodID(env, ffmpegMediaPlayerClazz, "updateSound", "([BII)V");
+    jni_mid_pushSound = (*env)->GetMethodID(env, ffmpegMediaPlayerClazz, "pushSound", "(Ljava/nio/ByteBuffer;II)V");
     jni_mid_updateAttributes1 = (*env)->GetMethodID(env, ffmpegMediaPlayerClazz, "updateAttributes", "(IIIIIFIILjava/lang/String;Ljava/lang/String;)V");
     jni_mid_updateAttributes2 = (*env)->GetMethodID(env, ffmpegMediaPlayerClazz, "updateAttributes2", "(IIIIIIIIII)V");
 
-    if(jni_mid_updateSound == NULL ||
+    if(jni_mid_pushSound == NULL ||
        jni_mid_updateAttributes1 == NULL ||
        jni_mid_updateAttributes2 == NULL) {
         return JNI_FALSE;
@@ -415,7 +383,7 @@ JNIEXPORT void JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_destroy
 }
 
 JNIEXPORT void JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_setStream0
-  (JNIEnv *env, jobject instance, jlong ptr, jstring jURL, jint vid, jint aid)
+  (JNIEnv *env, jobject instance, jlong ptr, jstring jURL, jint vid, jint aid, jint audioFrameCount)
 {
     int res, i;
     jboolean iscopy;
@@ -525,11 +493,17 @@ JNIEXPORT void JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_setStre
         pAV->aChannels = pAV->pACodecCtx->channels;
         pAV->aFrameSize = pAV->pACodecCtx->frame_size;
         pAV->aSampleFmt = pAV->pACodecCtx->sample_fmt;
-        pAV->pAFrame=sp_avcodec_alloc_frame();
-        if(pAV->pAFrame==NULL) {
-            JoglCommon_throwNewRuntimeException(env, "Couldn't alloc audio frame");
-            return;
+
+        pAV->aFrameCount = audioFrameCount;
+        pAV->pAFrames = calloc(audioFrameCount, sizeof(AVFrame*));
+        for(i=0; i<pAV->aFrameCount; i++) {
+            pAV->pAFrames[i]=sp_avcodec_alloc_frame();
+            if(pAV->pAFrames[i]==NULL) {
+                JoglCommon_throwNewRuntimeException(env, "Couldn't alloc audio frame %d / %d", i, audioFrameCount);
+                return;
+            }
         }
+        pAV->aFrameCurrent = 0;
     }
 
     if(0<=pAV->vid) {
@@ -622,11 +596,12 @@ JNIEXPORT jint JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_readNex
     if(sp_av_read_frame(pAV->pFormatCtx, &packet)>=0) {
         if(packet.stream_index==pAV->aid) {
             // Decode audio frame
-            if(NULL == pAV->pAFrame) {
+            if(NULL == pAV->pAFrames) { // no audio registered
                 sp_av_free_packet(&packet);
                 return res;
             }
-
+            AVFrame* pAFrameCurrent = pAV->pAFrames[pAV->aFrameCurrent];
+            pAV->aFrameCurrent = ( pAV->aFrameCurrent + 1 ) % pAV->aFrameCount ;
             int new_packet = 1;
             int len1;
             int flush_complete = 0;
@@ -636,7 +611,7 @@ JNIEXPORT jint JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_readNex
                     break;
                 }
                 if(HAS_FUNC(sp_avcodec_decode_audio4)) {
-                    len1 = sp_avcodec_decode_audio4(pAV->pACodecCtx, pAV->pAFrame, &frameFinished, &packet);
+                    len1 = sp_avcodec_decode_audio4(pAV->pACodecCtx, pAFrameCurrent, &frameFinished, &packet);
                 } else {
                     #if 0
                     len1 = sp_avcodec_decode_audio3(pAV->pACodecCtx, int16_t *samples, int *frame_size_ptr, &frameFinished, &packet);
@@ -664,11 +639,11 @@ JNIEXPORT jint JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_readNex
                 if(HAS_FUNC(sp_av_samples_get_buffer_size)) {
                     data_size = sp_av_samples_get_buffer_size(NULL /* linesize, may be NULL */,
                                                               pAV->aChannels,
-                                                              pAV->pAFrame->nb_samples,
-                                                              pAV->pAFrame->format,
+                                                              pAFrameCurrent->nb_samples,
+                                                              pAFrameCurrent->format,
                                                               1 /* align */);
                 }
-                int32_t pts = (int64_t) ( pAV->pAFrame->pkt_pts * (int64_t) 1000 * (int64_t) pAV->pAStream->time_base.num )
+                int32_t pts = (int64_t) ( pAFrameCurrent->pkt_pts * (int64_t) 1000 * (int64_t) pAV->pAStream->time_base.num )
                               / (int64_t) pAV->pAStream->time_base.den;
                 #if 0
                 printf("channels %d sample_rate %d \n", pAV->aChannels , pAV->aSampleRate);
@@ -679,10 +654,10 @@ JNIEXPORT jint JNICALL Java_jogamp_opengl_util_av_impl_FFMPEGMediaPlayer_readNex
                 if( pAV->verbose ) {
                     printf("A pts %d - %d\n", pts, pAV->aPTS);
                 }
-                // TODO: Wrap audio buffer data in a com.jogamp.openal.sound3d.Buffer or similar
-                // and hand it over to the user using a suitable API.
-                // TODO: OR send the audio buffer data down to sound card directly using JOAL.
-                _updateSound(env, instance, pAV->pAFrame->data[0], data_size, pAV->aPTS);
+                if( NULL != env ) {
+                    jobject jSampleData = (*env)->NewDirectByteBuffer(env, pAFrameCurrent->data[0], data_size);
+                    (*env)->CallVoidMethod(env, instance, jni_mid_pushSound, jSampleData, data_size, pAV->aPTS);
+                }
 
                 res = 1;
             }