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49 lines
1.3 KiB
49 lines
1.3 KiB
package com.inspect.tcpserver.sip.media;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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public class RtpSender {
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private DatagramSocket socket;
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private InetAddress address;
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private int port;
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private int seq = 0;
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private long timestamp = 0;
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private int ssrc;
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public RtpSender(String ip, int port, int ssrc) throws Exception {
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this.socket = new DatagramSocket();
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this.address = InetAddress.getByName(ip);
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this.port = port;
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this.ssrc = ssrc;
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}
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public void send(byte[] payload, boolean mark) throws Exception {
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byte[] rtp = new byte[12 + payload.length];
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rtp[0] = (byte) 0x80;
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rtp[1] = (byte) (96 | (mark ? 0x80 : 0));
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rtp[2] = (byte) (seq >> 8);
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rtp[3] = (byte) (seq);
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seq++;
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timestamp += 3600; // 90k时钟
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rtp[4] = (byte) (timestamp >> 24);
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rtp[5] = (byte) (timestamp >> 16);
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rtp[6] = (byte) (timestamp >> 8);
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rtp[7] = (byte) (timestamp);
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rtp[8] = (byte) (ssrc >> 24);
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rtp[9] = (byte) (ssrc >> 16);
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rtp[10] = (byte) (ssrc >> 8);
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rtp[11] = (byte) (ssrc);
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System.arraycopy(payload, 0, rtp, 12, payload.length);
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socket.send(new DatagramPacket(rtp, rtp.length, address, port));
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}
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}
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