Please, help with Live Audio/Video example from jmf solutions

Question

Hello,
I�m desperate looking for a solution for a particular problem.
I�m trying to feed JMF with an AudioInputStream generated via Java Sound, so that I can send it via RTP. The problem is that I don�t know how to properly create a DataSource from an InputStream. I know the example Live Audio/Video Data from the jmf solutions focuses on something similar.
The problem is that I don�t know exactly how it works, os, the question is, how can I modify that example in order to use it and try to create a proper DataSource from the AudioInputStream, and then try to send it via RTP?
I think that I manage to create a DataSource and pass it to the class AVTransmit2 from the jmf examples, and from that DataSource create a processor, which creates successfully, and then find a corresponding format and try to send it, but when i try to send it or play it I get garbage sound, so I�m not really sure whether I create the DataSource correctly or not, as I�ve made some changes on the Live Audio/Video Data from the jmf solutions to construct a livestream from the audioinputstream. Actually, I don�t understand where in the code does it construct the DataSource from the livestream, from an inputStream, because there�s not constructor like this DataSource(InputStream) neither nothing similar.
Please help me as I�m getting very stuck with this, I would really appreciate your help,
thanks for your time, bye.

Answer 1

import javax.media.*;
import javax.media.format.*;
import javax.media.protocol.*;
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
public class LiveAudioStream implements PushBufferStream, Runnable {
    protected ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW);
    protected int maxDataLength;
    protected int vez = 0;
    protected AudioInputStream data;
    public AudioInputStream audioStream;
    protected byte[] audioBuffer;
    protected javax.media.format.AudioFormat audioFormat;
    protected boolean started;
    protected Thread thread;
    protected float frameRate = 20f;
    protected BufferTransferHandler transferHandler;
    protected Control [] controls = new Control[0];
    public LiveAudioStream(byte[] audioBuf) {
         audioBuffer = audioBuf;
                  audioFormat = new AudioFormat(AudioFormat.ULAW,
                      8000.0,
                      8,
                      1,
                      Format.NOT_SPECIFIED,
                      AudioFormat.SIGNED,
                      8,
                      Format.NOT_SPECIFIED,
                      Format.byteArray);
                  maxDataLength = 40764;
                  thread = new Thread(this);
     * SourceStream
    public ContentDescriptor getContentDescriptor() {
     return cd;
    public long getContentLength() {
     return LENGTH_UNKNOWN;
    public boolean endOfStream() {
     return false;
     * PushBufferStream
    int seqNo = 0;
    double freq = 2.0;
    public Format getFormat() {
         return audioFormat;
    public void read(Buffer buffer) throws IOException {
     synchronized (this) {
         Object outdata = buffer.getData();
         if (outdata == null || !(outdata.getClass() == Format.byteArray) ||
          ((byte[])outdata).length < maxDataLength) {
          outdata = new byte[maxDataLength];
          buffer.setData(audioBuffer);          
          buffer.setFormat( audioFormat );
          buffer.setTimeStamp( 1000000000 / 8 );
         buffer.setSequenceNumber( seqNo );
         buffer.setLength(maxDataLength);
         buffer.setFlags(0);
         buffer.setHeader( null );
         seqNo++;
    public void setTransferHandler(BufferTransferHandler transferHandler) {
     synchronized (this) {
         this.transferHandler = transferHandler;
         notifyAll();
    void start(boolean started) {
     synchronized ( this ) {
         this.started = started;
         if (started && !thread.isAlive()) {
          thread = new Thread(this);
          thread.start();
         notifyAll();
     * Runnable
    public void run() {
     while (started) {
         synchronized (this) {
          while (transferHandler == null && started) {
              try {
               wait(1000);
              } catch (InterruptedException ie) {
          } // while
         if (started && transferHandler != null) {
          transferHandler.transferData(this);
          try {
              Thread.currentThread().sleep( 10 );
          } catch (InterruptedException ise) {
     } // while (started)
    } // run
    // Controls
    public Object [] getControls() {
     return controls;
    public Object getControl(String controlType) {
       try {
          Class  cls = Class.forName(controlType);
          Object cs[] = getControls();
          for (int i = 0; i < cs.length; i++) {
             if (cls.isInstance(cs))
return cs[i];
return null;
} catch (Exception e) {   // no such controlType or such control
return null;
and the other one, the DataSource,
import javax.media.Time;
import javax.media.protocol.*;
import java.io.IOException;
import java.io.InputStream;
import javax.sound.sampled.AudioInputStream;
public class CustomDataSource extends PushBufferDataSource {
    protected Object [] controls = new Object[0];
    protected boolean started = false;
    protected String contentType = "raw";
    protected boolean connected = false;
    protected Time duration = DURATION_UNKNOWN;
    protected LiveAudioStream [] streams = null;
    protected LiveAudioStream stream = null;
    public CustomDataSource(LiveAudioStream ls) {
         streams = new LiveAudioStream[1];
         stream = streams[0]= ls;
    public String getContentType() {
     if (!connected){
            System.err.println("Error: DataSource not connected");
            return null;
     return contentType;
    public byte[] getData() {
         return stream.audioBuffer;
    public void connect() throws IOException {
      if (connected)
            return;
      connected = true;
    public void disconnect() {
     try {
            if (started)
                stop();
        } catch (IOException e) {}
     connected = false;
    public void start() throws IOException {
     // we need to throw error if connect() has not been called
        if (!connected)
            throw new java.lang.Error("DataSource must be connected before it can be started");
        if (started)
            return;
     started = true;
     stream.start(true);
    public void stop() throws IOException {
     if ((!connected) || (!started))
         return;
     started = false;
     stream.start(false);
    public Object [] getControls() {
     return controls;
    public Object getControl(String controlType) {
       try {
          Class  cls = Class.forName(controlType);
          Object cs[] = getControls();
          for (int i = 0; i < cs.length; i++) {
             if (cls.isInstance(cs))
return cs[i];
return null;
} catch (Exception e) {   // no such controlType or such control
return null;
public Time getDuration() {
     return duration;
public PushBufferStream [] getStreams() {
     return streams;
hope this helps