How to send audio stream over UDP in java?

Question

I have a problem, I installed MediaLocator to input the microphone, and then created a Player. I need to capture this sound from a microphone, encode it to some lower quality stream and send it as a datagram packet via UDP. Here's the code, I found most of it on the Internet and adapted it to my application:

public class AudioSender extends Thread {

private MediaLocator ml = new MediaLocator("javasound://44100");
private DatagramSocket socket;
private boolean transmitting;
private Player player;
TargetDataLine mic;
byte[] buffer;
private AudioFormat format;


private DatagramSocket datagramSocket(){
    try {
        return new DatagramSocket();
    } catch (SocketException ex) {
        return null;
    }
}

private void startMic() {
    try {
        format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 8000.0F, 16, 2, 4, 8000.0F, true);
        DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
        mic = (TargetDataLine) AudioSystem.getLine(info);
        mic.open(format);
        mic.start();
        buffer = new byte[1024];
    } catch (LineUnavailableException ex) {
        Logger.getLogger(AudioSender.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private Player createPlayer() {
    try {
        return Manager.createRealizedPlayer(ml);
    } catch (IOException ex) {
        return null;
    } catch (NoPlayerException ex) {
        return null;
    } catch (CannotRealizeException ex) {
        return null;
    }
}

private void send() {
    try {
        mic.read(buffer, 0, 1024);
        DatagramPacket packet = 
            new DatagramPacket(
                buffer, buffer.length, InetAddress.getByName(Util.getRemoteIP()), 91);
        socket.send(packet);
    } catch (IOException ex) {
        Logger.getLogger(AudioSender.class.getName()).log(Level.SEVERE, null, ex);
    }
}

@Override
public void run() {
    player = createPlayer();
    player.start();
    socket = datagramSocket();
    transmitting = true;
    startMic();
    while (transmitting) {
        send();
    }  
}

public static void main(String[] args) {
    AudioSender as = new AudioSender();
    as.start();
}

}

And only when I run the receiver class, I hear this Player from the sender class. And it seems that I do not see the connection between TargetDataLine and Player. Basically, I need to get a sound player and somehow convert it to bytes [], so I can send it as a datagram. Any ideas? Everything is acceptable if it works :)

Answer 1

Player , javax.sound.sampled. , Player , .

, .read TargetDataLine, , , .