Help to execute AvTransmit and AVRecieve examples from JMF solution page

hi, all. i want to use the AVTransmit and AVRecieve classess from the JMF solutions page to transmit voice from one computer to another.
Please how can i specify the source locator to be the microphone connected to my PC. please help i want to implement a voive chat.
If u have any links that could help me on my voice chat project, i'l appreciate it if u could help me with it.
Thanks

Hi
I think this will be useful for you..
http://java.sun.com/products/java-media/jmf/2.1.1/solutions/AVTransmit.html#howto
To Transmit video use - "vfw://0" , to Transmit audio use - "javasound:/0/8000" - instead of "file:/avmedia.mov"
Karthikeyan R

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

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.

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

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thanks in advance.

My comments below are all between (((((( and ))))))
<html>
<body>
<h2 align="center"><u><b><span style="background-color: #FFFFFF"><font color="#C0C0C0" face="Comic Sans MS">Leave
Approval Requests</font></span></b></u></h2>
<form method="POST" name="f1" action="update.jsp">
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:employee_details");
PreparedStatement p=null;
p=con.prepareStatement("select * from emp_leave_application where approver='"+username+"'");
ResultSet r=p.executeQuery();
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%> <table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
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<table border="1" width="100%" height="171" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
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<td width="100%" height="165" valign="top">
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((((((( in the statement above, name="id" should be changed to something like name="id"<%=ii%>
Where ii is a counter that tells you how many times you have gone through the loop so far.
The reason for this is that each textfield you generate must have a unique name rather than all have the same name
such as 'id'. This change will give them names such as id0, id1, id2. Then when you submit the page, you can uniquely
identify each input textfield.))))))
<b>status</b>:<%=r.getString(5)%</p>
<p><b>Leave From</b> : <%=r.getString(2)%></p>
<p><b>Leave From</b> : <%=r.getString(3)%></p>
<p><b>Approve</b> : <select size="1" name="approved">
(((( the above select also has to have a unique name for each time through the loop. Change it to name="approved"<%=ii%>
<option value="Approved">Approved</option>
<option value="Cancelled">Cancelled</option> </select></p>
<%
con.close();
%>
<table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" bgcolor="#999966">
<p align="center"><input type="reset" value="Clear" name="B1">
<input type="submit" value="Submit" name="B2"></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>
(((((((note you would be better off long term to put your business logic in a servlet and dispatch to the JSP page which will only have the responsiblity to display the data.
Also, connection pooling is better than the above.

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