package com.inspect.tcpserver.sip.stream;

public class RtpPacket {

    public static final int HEADER_SIZE = 12;

    public byte[] buffer;
    public int length;

    public RtpPacket(int payloadSize) {
        buffer = new byte[HEADER_SIZE + payloadSize];
    }

    public void setHeader(
            int payloadType,
            int seq,
            long timestamp,
            int ssrc,
            boolean marker
    ) {
        buffer[0] = (byte) 0x80;
        buffer[1] = (byte) (payloadType & 0x7F);
        if (marker) buffer[1] |= 0x80;

        buffer[2] = (byte) (seq >> 8);
        buffer[3] = (byte) (seq);

        buffer[4] = (byte) (timestamp >> 24);
        buffer[5] = (byte) (timestamp >> 16);
        buffer[6] = (byte) (timestamp >> 8);
        buffer[7] = (byte) (timestamp);

        buffer[8] = (byte) (ssrc >> 24);
        buffer[9] = (byte) (ssrc >> 16);
        buffer[10] = (byte) (ssrc >> 8);
        buffer[11] = (byte) (ssrc);
    }
}