package com.inspect.tcpserver.sip.stream;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class RtpSender {

    private static final int MTU = 1400;
    private static final int PAYLOAD_TYPE = 98;

    private int seq = 0;
    private final int ssrc;
    private final RtpSocket socket;
    private final RtpClock clock = new RtpClock();

    public RtpSender(String ip, int port, int ssrc) throws Exception {
        this.ssrc = ssrc;
        this.socket = new RtpSocket(ip, port);
    }

    public void sendPs(byte[] ps) throws Exception {
        long ts = clock.next();

        int offset = 0;
        while (offset < ps.length) {
            int size = Math.min(MTU, ps.length - offset);
            boolean marker = (offset + size) >= ps.length;

            RtpPacket pkt = new RtpPacket(size);
            pkt.setHeader(PAYLOAD_TYPE, seq++, ts, ssrc, marker);

            System.arraycopy(ps, offset, pkt.buffer, RtpPacket.HEADER_SIZE, size);
            pkt.length = RtpPacket.HEADER_SIZE + size;


            socket.send(pkt.buffer, pkt.length);
            offset += size;
            log.info("sendPs offset = {}", offset);
        }
    }

    public void close() {
        socket.close();
    }
}