/**
* BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
*
* Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; either version 3.0 of the License, or (at your option) any later
* version.
*
* BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
*
*/
package org.bigbluebutton.voiceconf.red5.media;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Random;
import org.slf4j.Logger;
import org.bigbluebutton.voiceconf.red5.media.net.RtpPacket;
import org.bigbluebutton.voiceconf.red5.media.net.RtpSocket;
import org.bigbluebutton.voiceconf.sip.SipConnectInfo;
import org.bigbluebutton.voiceconf.util.StackTraceUtil;
import org.red5.logging.Red5LoggerFactory;
public class RtpStreamSender {
private static Logger log = Red5LoggerFactory.getLogger(RtpStreamSender.class, "sip");
private static final int RTP_HEADER_SIZE = 12;
private RtpSocket rtpSocket = null;
private int sequenceNum = 0;
private final DatagramSocket srcSocket;
private final SipConnectInfo connInfo;
private boolean marked = false;
private long startTimestamp;
public RtpStreamSender(DatagramSocket srcSocket, SipConnectInfo connInfo) {
this.srcSocket = srcSocket;
this.connInfo = connInfo;
}
public void connect() throws StreamException {
try {
rtpSocket = new RtpSocket(srcSocket, InetAddress.getByName(connInfo.getRemoteAddr()), connInfo.getRemotePort());
Random rgen = new Random();
sequenceNum = rgen.nextInt(1000);
} catch (UnknownHostException e) {
log.error("Failed to connect to {}", connInfo.getRemoteAddr());
log.error(StackTraceUtil.getStackTrace(e));
throw new StreamException("Rtp sender failed to connect to " + connInfo.getRemoteAddr() + ".");
}
}
public void sendAudio(byte[] audioData, int codecId, long timestamp) {
byte[] transcodedAudioDataBuffer = new byte[audioData.length + RTP_HEADER_SIZE];
System.arraycopy(audioData, 0, transcodedAudioDataBuffer, RTP_HEADER_SIZE, audioData.length);
RtpPacket rtpPacket = new RtpPacket(transcodedAudioDataBuffer, transcodedAudioDataBuffer.length);
if (!marked) {
rtpPacket.setMarker(true);
marked = true;
startTimestamp = System.currentTimeMillis();
}
rtpPacket.setPadding(false);
rtpPacket.setExtension(false);
rtpPacket.setPayloadType(codecId);
rtpPacket.setSeqNum(sequenceNum++);
rtpPacket.setTimestamp(timestamp);
rtpPacket.setPayloadLength(audioData.length);
try {
rtpSocketSend(rtpPacket);
} catch (StreamException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private synchronized void rtpSocketSend(RtpPacket rtpPacket) throws StreamException {
try {
rtpSocket.send(rtpPacket);
} catch (IOException e) {
log.error("Exception while trying to send rtp packet");
log.error(StackTraceUtil.getStackTrace(e));
throw new StreamException("Failed to send data to server.");
}
}
}