12 April 2007

Sound over IP with jmf RTP

This code will allow you to send and recive sound over IP network using RTP protocol.


import java.io.IOException;
import java.util.Vector;

import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.DataSink;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.NoProcessorException;
import javax.media.NotRealizedError;
import javax.media.Player;
import javax.media.Processor;
import javax.media.control.FormatControl;
import javax.media.control.TrackControl;
import javax.media.format.AudioFormat;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.DataSource;

public class SimpleVoiceTransmiter {

/**
* @param args
*/
public static void main(String[] args) {
// First find a capture device that will capture linear audio
// data at 8bit 8Khz
AudioFormat format= new AudioFormat(AudioFormat.LINEAR,
8000,
8,
1);

Vector devices= CaptureDeviceManager.getDeviceList( format);

CaptureDeviceInfo di= null;

if (devices.size() > 0) {
di = (CaptureDeviceInfo) devices.elementAt( 0);
}
else {
// exit if we could not find the relevant capturedevice.
System.exit(-1);
}

// Create a processor for this capturedevice & exit if we
// cannot create it
Processor processor = null;
try {
processor = Manager.createProcessor(di.getLocator());
} catch (IOException e) {
System.exit(-1);
} catch (NoProcessorException e) {
System.exit(-1);
}

// configure the processor
processor.configure();

while (processor.getState() != Processor.Configured){
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

processor.setContentDescriptor(
new ContentDescriptor( ContentDescriptor.RAW));

TrackControl track[] = processor.getTrackControls();

boolean encodingOk = false;

// Go through the tracks and try to program one of them to
// output gsm data.

for (int i = 0; i < track.length; i++) {
if (!encodingOk && track[i] instanceof FormatControl) {
if (((FormatControl)track[i]).
setFormat( new AudioFormat(AudioFormat.GSM_RTP,
8000,
8,
1)) == null) {

track[i].setEnabled(false);
}
else {
encodingOk = true;
}
} else {
// we could not set this track to gsm, so disable it
track[i].setEnabled(false);
}
}

// At this point, we have determined where we can send out
// gsm data or not.
// realize the processor
if (encodingOk) {
processor.realize();
while (processor.getState() != Processor.Realized){
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// get the output datasource of the processor and exit
// if we fail
DataSource ds = null;

try {
ds = processor.getDataOutput();
} catch (NotRealizedError e) {
System.exit(-1);
}

// hand this datasource to manager for creating an RTP
// datasink our RTP datasink will multicast the audio
try {
String url= "rtp://224.0.0.1:22224/audio/16";

MediaLocator m = new MediaLocator(url);

DataSink d = Manager.createDataSink(ds, m);
d.open();
d.start();
processor.start();
} catch (Exception e) {
System.exit(-1);
}
}



}

}




import java.io.IOException;
import java.net.MalformedURLException;

import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.Player;

public class SimpleVoiceReciver{

/**
* @param args
*/
public static void main(String[] args) {
String url= "rtp://192.168.1.111:22224/audio/16";

MediaLocator mrl= new MediaLocator(url);

if (mrl == null) {
System.err.println("Can't build MRL for RTP");
System.exit(-1);
}

// Create a player for this rtp session
Player player = null;
try {
player = Manager.createPlayer(mrl);
} catch (NoPlayerException e) {
System.err.println("Error:" + e);
System.exit(-1);
} catch (MalformedURLException e) {
System.err.println("Error:" + e);
System.exit(-1);
} catch (IOException e) {
System.err.println("Error:" + e);
System.exit(-1);
}

if (player != null) {
System.out.println("Player created.");
player.realize();
// wait for realizing
while (player.getState() != Player.Realized){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
player.start();
} else {
System.err.println("Player doesn't created.");
System.exit(-1);
}
}

}

4 comments:

Anonymous said...

did you just copy this from http://snippets.dzone.com/posts/show/3108 without giving credit where credit is due?

Anonymous said...

hello friend first see this blog posted date with http://snippets.dzone.com/posts/show/3108 posted date . after that you will get who just copy this from

Anonymous said...

Hello!! Can somebody help me with this? It doesn't work with mine ...
Couldn't find any capturing device.

Anonymous said...

Can u please post code for full duplex voice chat?