Voice chat or sound call using socket in java

Scenario 1: Voice chat between two users / clients performing well if and only if both use headphones.

Scenario 2: If either of them is not using headphones, voice chat works, but the noise gradually increases.

How it works

The sound of the microphone of client 1 and its transmission to client 2. But the sound of the speaker of client 1 is also recorded and sent to client 2. Thus, client 2 hears its own sound and the sound of client 1 many times, and the noise grows and increases.

purpose

I need to stop recording speaker sound. How can I read / write only the microphone input sound while filtering the speaker sound? Please, help.

Here is my code:

public class Server {
ServerSocket MyService;
Socket clientSocket = null;
InputStream input;
TargetDataLine targetDataLine;
OutputStream out;
AudioFormat audioFormat;
SourceDataLine sourceDataLine;
byte tempBuffer[] = new byte[10000];
static Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();

Server() throws LineUnavailableException {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.show();
    try {
        Mixer mixer_ = AudioSystem.getMixer(mixerInfo[0]);
        audioFormat = getAudioFormat();
        DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, audioFormat);
        sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
        sourceDataLine.open(audioFormat);
        sourceDataLine.start();
        MyService = new ServerSocket(500);
        clientSocket = MyService.accept();
        captureAudio();
        input = new BufferedInputStream(clientSocket.getInputStream());
        out = new BufferedOutputStream(clientSocket.getOutputStream());
        while (input.read(tempBuffer) != -1) {
            sourceDataLine.write(tempBuffer, 0, 10000);

        }

    } catch (IOException e) {

        e.printStackTrace();
    }

}

private AudioFormat getAudioFormat() {
    float sampleRate = 8000.0F;
    int sampleSizeInBits = 8;
    int channels = 1;
    boolean signed = true;
    boolean bigEndian = false;
    return new AudioFormat(
            sampleRate,
            sampleSizeInBits,
            channels,
            signed,
            bigEndian);
}

public static void main(String s[]) throws LineUnavailableException {
    Server s2 = new Server();
}

private void captureAudio() {
    try {

        audioFormat = getAudioFormat();
        DataLine.Info dataLineInfo = new DataLine.Info(
                TargetDataLine.class, audioFormat);
        Mixer mixer = null;
        System.out.println("Available mixers:");
        for (int cnt = 0; cnt < mixerInfo.length; cnt++) {
            mixer = AudioSystem.getMixer(mixerInfo[3]);
            if (mixer.isLineSupported(dataLineInfo)) {
                System.out.println(mixerInfo[cnt].getName());
                targetDataLine = (TargetDataLine) mixer.getLine(dataLineInfo);
            }
        }
        targetDataLine.open(audioFormat);
        targetDataLine.start();

        Thread captureThread = new CaptureThread();
        captureThread.start();
    } catch (Exception e) {
        System.out.println(e);
        System.exit(0);
    }
}

class CaptureThread extends Thread {

    byte tempBuffer[] = new byte[10000];

    @Override
    public void run() {
        try {
            while (true) {
                int cnt = targetDataLine.read(tempBuffer, 0, tempBuffer.length);
                out.write(tempBuffer);
                out.flush();

            }

        } catch (Exception e) {
            System.out.println(e);
            System.exit(0);
        }
    }
}}

      

        
        
        
      

    

AND

public class Client {
boolean stopCapture = false;
ByteArrayOutputStream byteArrayOutputStream;
AudioFormat audioFormat;
TargetDataLine targetDataLine;
AudioInputStream audioInputStream;
BufferedOutputStream out = null;
BufferedInputStream in = null;
Socket sock = null;
SourceDataLine sourceDataLine;

public static void main(String[] args) {
    Client tx = new Client();
    tx.captureAudio();
}

private void captureAudio() {
    try {
        sock = new Socket("192.168.1.3", 500);
        out = new BufferedOutputStream(sock.getOutputStream());
        in = new BufferedInputStream(sock.getInputStream());

        Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();
        System.out.println("Available mixers:");
        for (int cnt = 0; cnt < mixerInfo.length; cnt++) {
            System.out.println(mixerInfo[cnt].getName());
        }
        audioFormat = getAudioFormat();

        DataLine.Info dataLineInfo = new DataLine.Info(
                TargetDataLine.class, audioFormat);

        Mixer mixer = AudioSystem.getMixer(mixerInfo[2]);

        targetDataLine = (TargetDataLine) mixer.getLine(dataLineInfo);

        targetDataLine.open(audioFormat);
        targetDataLine.start();

        Thread captureThread = new CaptureThread();
        captureThread.start();

        DataLine.Info dataLineInfo1 = new DataLine.Info(
                SourceDataLine.class, audioFormat);
        sourceDataLine = (SourceDataLine) AudioSystem
                .getLine(dataLineInfo1);
        sourceDataLine.open(audioFormat);
        sourceDataLine.start();

        Thread playThread = new PlayThread();
        playThread.start();

    } catch (Exception e) {
        System.out.println(e);
        System.exit(0);
    }
}

class CaptureThread extends Thread {

    byte tempBuffer[] = new byte[10000];

    @Override
    public void run() {
        byteArrayOutputStream = new ByteArrayOutputStream();
        stopCapture = false;
        try {
            while (!stopCapture) {

                int cnt = targetDataLine.read(tempBuffer, 0,
                        tempBuffer.length);

                out.write(tempBuffer);

                if (cnt > 0) {

                    byteArrayOutputStream.write(tempBuffer, 0, cnt);

                }
            }
            byteArrayOutputStream.close();
        } catch (Exception e) {
            System.out.println(e);
            System.exit(0);
        }
    }
}

private AudioFormat getAudioFormat() {
    float sampleRate = 8000.0F;

    int sampleSizeInBits = 8;

    int channels = 1;

    boolean signed = true;

    boolean bigEndian = false;

    return new AudioFormat(sampleRate, sampleSizeInBits, channels, signed,
            bigEndian);
}

class PlayThread extends Thread {

    byte tempBuffer[] = new byte[10000];

    @Override
    public void run() {
        try {
            while (in.read(tempBuffer) != -1) {
                sourceDataLine.write(tempBuffer, 0, 10000);

            }
            sourceDataLine.drain();
            sourceDataLine.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
  }

      

        
        
        
      

    

}