/** Creates a new socket, cleaning up if anything goes wrong in the process */
private MulticastSocket createMulticastSocket(String label, InetAddress intf, int port)
throws Exception {
MulticastSocket socket = null;
try {
_logger.info(
"Preparing {} socket. interface:{}, port:{}, group:{}",
label,
(intf == null ? "default" : intf),
(port == 0 ? "any" : port),
_group);
// in previous versions the interface was selected using constructor instead of
// 'socket.setInterface(intf)'
// but that uncovered side-effect in OSX which caused 'cannot assign address' Java bug
socket = new MulticastSocket(port); // (port '0' means any port)
if (intf != null) socket.setInterface(intf);
// join the multicast group
socket.joinGroup(_group);
_logger.info("{} ready. localAddr:{}", label, socket.getLocalSocketAddress());
return socket;
} catch (Exception exc) {
Stream.safeClose(socket);
throw exc;
}
}
/**
* Send data to all participants registered as receivers, using the current timeStamp and payload
* type. The RTP timestamp will be the same for all the packets.
*
* @param buffers A buffer of bytes, should not bed padded and less than 1500 bytes on most
* networks.
* @param csrcArray an array with the SSRCs of contributing sources
* @param markers An array indicating what packets should be marked. Rarely anything but the first
* one
* @param rtpTimestamp The RTP timestamp to be applied to all packets
* @param seqNumbers An array with the sequence number associated with each byte[]
* @return null if there was a problem sending the packets, 2-dim array with {RTP Timestamp,
* Sequence number}
*/
public long[][] sendData(
byte[][] buffers, long[] csrcArray, boolean[] markers, long rtpTimestamp, long[] seqNumbers) {
logger.debug("-> RTPSession.sendData(byte[])");
// Same RTP timestamp for all
if (rtpTimestamp < 0) rtpTimestamp = System.currentTimeMillis();
// Return values
long[][] ret = new long[buffers.length][2];
for (int i = 0; i < buffers.length; i++) {
byte[] buf = buffers[i];
boolean marker = false;
if (markers != null) marker = markers[i];
if (buf.length > 1500) {
System.out.println(
"RTPSession.sendData() called with buffer exceeding 1500 bytes (" + buf.length + ")");
}
// Get the return values
ret[i][0] = rtpTimestamp;
if (seqNumbers == null) {
ret[i][1] = getNextSeqNum();
} else {
ret[i][1] = seqNumbers[i];
}
// Create a new RTP Packet
RtpPkt pkt = new RtpPkt(rtpTimestamp, this.ssrc, (int) ret[i][1], this.payloadType, buf);
if (csrcArray != null) pkt.setCsrcs(csrcArray);
pkt.setMarked(marker);
// Creates a raw packet
byte[] pktBytes = pkt.encode();
// System.out.println(Integer.toString(StaticProcs.bytesToUIntInt(pktBytes, 2)));
// Pre-flight check, are resolving an SSRC conflict?
if (this.conflict) {
System.out.println("RTPSession.sendData() called while trying to resolve conflict.");
return null;
}
if (this.mcSession) {
DatagramPacket packet = null;
try {
packet =
new DatagramPacket(pktBytes, pktBytes.length, this.mcGroup, this.rtpMCSock.getPort());
} catch (Exception e) {
System.out.println("RTPSession.sendData() packet creation failed.");
e.printStackTrace();
return null;
}
try {
rtpMCSock.send(packet);
// Debug
if (this.debugAppIntf != null) {
this.debugAppIntf.packetSent(
1,
(InetSocketAddress) packet.getSocketAddress(),
new String(
"Sent multicast RTP packet of size "
+ packet.getLength()
+ " to "
+ packet.getSocketAddress().toString()
+ " via "
+ rtpMCSock.getLocalSocketAddress().toString()));
}
} catch (Exception e) {
System.out.println("RTPSession.sendData() multicast failed.");
e.printStackTrace();
return null;
}
} else {
// Loop over recipients
Iterator<Participant> iter = partDb.getUnicastReceivers();
while (iter.hasNext()) {
InetSocketAddress receiver = iter.next().rtpAddress;
DatagramPacket packet = null;
logger.debug(" Sending to {}", receiver);
try {
packet = new DatagramPacket(pktBytes, pktBytes.length, receiver);
} catch (Exception e) {
System.out.println("RTPSession.sendData() packet creation failed.");
e.printStackTrace();
return null;
}
// Actually send the packet
try {
rtpSock.send(packet);
// Debug
if (this.debugAppIntf != null) {
this.debugAppIntf.packetSent(
0,
(InetSocketAddress) packet.getSocketAddress(),
new String(
"Sent unicast RTP packet of size "
+ packet.getLength()
+ " to "
+ packet.getSocketAddress().toString()
+ " via "
+ rtpSock.getLocalSocketAddress().toString()));
}
} catch (Exception e) {
System.out.println("RTPSession.sendData() unicast failed.");
e.printStackTrace();
return null;
}
}
}
// Update our stats
this.sentPktCount++;
this.sentOctetCount++;
logger.info("<- RTPSession.sendData(byte[])", pkt.getSeqNumber());
}
return ret;
}
@Override
protected SocketAddress localAddress0() {
return socket.getLocalSocketAddress();
}