Voice echo in UDP based voice transmission [closed]
- by Meherzad
I have coded a java application for voice transmission between to ip in LAN.
Here the code.
public static Boolean flag= true;
public static Boolean recFlag=true;
DatagramSocket UDPSocket=null;
AudioFormat format = null;
TargetDataLine microphone=null;
byte[] buffer=null;
DatagramPacket UDPPacket=null;
public void startChat(String ipAddress){
try{
buffer = new byte[1000];
UDPSocket=new DatagramSocket(1987);
Thread th=new Thread(new Listener());
th.start();
microphone = AudioSystem.getTargetDataLine(format);
format= new AudioFormat(8000.0f, 16, 1, true, true);
UDPPacket = new DatagramPacket(buffer, buffer.length, InetAddress.getByName(ipAddress), 1988);
microphone.open(format);
microphone.start();
while (flag) {
microphone.read(buffer, 0, buffer.length);
UDPSocket.send(UDPPacket);
}
}
catch(Exception e){
System.out.println(" ssss "+e.getMessage());
}
}
public class Listener extends Thread{
byte[] buff=new byte[1000];
DatagramSocket UDPSocket1=null;
DatagramPacket recPacket=null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
SourceDataLine line=null;
@Override
public void run(){
try{
UDPSocket1=new DatagramSocket(1988);
format= new AudioFormat(8000.0f, 16, 1, true, true);
line = (SourceDataLine) AudioSystem.getLine(info);
line.open(format);
line.start();
}
catch(Exception e){
System.out.println("list "+ e.getMessage());
}
recPacket=new DatagramPacket(buff, buff.length);
while(recFlag){
try{
UDPSocket1.receive(recPacket);
buff = (byte[])recPacket.getData();
line.write(buff, 0, buff.length);
}
catch(Exception e){
System.out.println("errr "+e.getMessage());
}
}
line.drain();
line.close();
}
}
Main problem which I am facing that I am getting only echo of my own voice. I am unable to hear voice from the other end only I am hearing is my own voice. Please suggest any solution.
