yfyf510/dsc-codec

COder/DECoder of Digital Selective Call (DSC)

Codec (coder/decoder) for Digitical Selective Call

Description

This codec implements R-REC-M.493-14-201509.

For any questions please contact me on flyenj@gmail.com

Quick start

Transmission

Distress distress = new Distress(
  new Mmsi(123456789),
  COLLISION,
  new Coordinates("12345", "4321"),
  TimeUTC.now(),
  F1B_J2B_TTY_FEC
);

RTPSender sender = new RTPSender();
byte[] data = distress.encode();
sender.send(data);

Receive

```java public class TestReceive {

public static void main(String[] args) throws SocketException, UnknownHostException {

  RtpReceiver receiver = new RtpReceiver();

  receiver.start();

}

static class RtpReceiver implements RTPAppIntf {

private final String address = "192.168.4.79";

private final int port = 7100;

private final DscDecoder dscDecoder = new DscDecoder();

public void start() throws SocketException, UnknownHostException {
  RTPSession rtpSession = new RTPSession(
    new DatagramSocket(port, InetAddress.getByName(address)),
    new DatagramSocket(port + 1, InetAddress.getByName(address))
);

  rtpSession.naivePktReception(true);
  rtpSession.RTPSessionRegister(this, null, null);
}

@Override
public void receiveData(DataFrame dataFrame, Participant participant) {
  byte[] data = dataFrame.getConcatenatedData();

  for (int i = 0; i < data.length; i += 2) {
    dscDecoder.onBit(data[i] == 0 ? (byte) 1 : (byte) 0);
  }
}

} }