/**
* Gets the SSRC of a <tt>ReceiveStream</tt> as a (non-negative) <tt>long</tt>.
*
* <p>FMJ stores the 32-bit SSRC values in <tt>int</tt>s, and the <tt>ReceiveStream.getSSRC()</tt>
* implementation(s) don't take care of converting the negative <tt>int</tt> values sometimes
* resulting from reading of a 32-bit field into the correct unsigned <tt>long</tt> value. So do
* the conversion here.
*
* @param receiveStream the <tt>ReceiveStream</tt> for which to get the SSRC.
* @return the SSRC of <tt>receiveStream</tt> an a (non-negative) <tt>long</tt>.
*/
private long getReceiveStreamSSRC(ReceiveStream receiveStream) {
return 0xffffffffL & receiveStream.getSSRC();
}
/**
* Implements {@link ReceiveStreamListener#update(ReceiveStreamEvent)}.
*
* <p>{@link #rtpManager} will use this to notify us of <tt>ReceiveStreamEvent</tt>s.
*/
@Override
public void update(ReceiveStreamEvent event) {
if (event == null) return;
ReceiveStream receiveStream = event.getReceiveStream();
if (event instanceof NewReceiveStreamEvent) {
if (receiveStream == null) {
logger.warn("NewReceiveStreamEvent: null");
return;
}
final long ssrc = getReceiveStreamSSRC(receiveStream);
ReceiveStreamDesc receiveStreamDesc = findReceiveStream(ssrc);
if (receiveStreamDesc != null) {
String s = "NewReceiveStreamEvent for an existing SSRC. ";
if (receiveStream != receiveStreamDesc.receiveStream)
s += "(but different ReceiveStream object)";
logger.warn(s);
return;
} else receiveStreamDesc = new ReceiveStreamDesc(receiveStream);
if (logger.isInfoEnabled()) logger.info("New ReceiveStream, ssrc=" + ssrc);
// Find the format of the ReceiveStream
DataSource dataSource = receiveStream.getDataSource();
if (dataSource instanceof PushBufferDataSource) {
Format format = null;
PushBufferDataSource pbds = (PushBufferDataSource) dataSource;
for (PushBufferStream pbs : pbds.getStreams()) {
if ((format = pbs.getFormat()) != null) break;
}
if (format == null) {
logger.error("Failed to handle new ReceiveStream: " + "Failed to determine format");
return;
}
receiveStreamDesc.format = format;
} else {
logger.error("Failed to handle new ReceiveStream: " + "Unsupported DataSource");
return;
}
int rtpClockRate = -1;
if (receiveStreamDesc.format instanceof AudioFormat)
rtpClockRate = (int) ((AudioFormat) receiveStreamDesc.format).getSampleRate();
else if (receiveStreamDesc.format instanceof VideoFormat) rtpClockRate = 90000;
getSynchronizer().setRtpClockRate(ssrc, rtpClockRate);
// create a Processor and configure it
Processor processor = null;
try {
processor = Manager.createProcessor(receiveStream.getDataSource());
} catch (NoProcessorException npe) {
logger.error("Failed to create Processor: ", npe);
return;
} catch (IOException ioe) {
logger.error("Failed to create Processor: ", ioe);
return;
}
if (logger.isInfoEnabled()) logger.info("Created processor for SSRC=" + ssrc);
processor.addControllerListener(this);
receiveStreamDesc.processor = processor;
final int streamCount;
synchronized (receiveStreams) {
receiveStreams.add(receiveStreamDesc);
streamCount = receiveStreams.size();
}
/*
* XXX TODO IRBABOON
* This is a terrible hack which works around a failure to realize()
* some of the Processor-s for audio streams, when multiple streams
* start nearly simultaneously. The cause of the problem is currently
* unknown (and synchronizing all FMJ calls in RecorderRtpImpl
* does not help).
* XXX TODO NOOBABRI
*/
if (receiveStreamDesc.format instanceof AudioFormat) {
final Processor p = processor;
new Thread() {
@Override
public void run() {
// delay configuring the processors for the different
// audio streams to decrease the probability that they
// run together.
try {
int ms = 450 * (streamCount - 1);
logger.warn(
"Sleeping for "
+ ms
+ "ms before"
+ " configuring processor for SSRC="
+ ssrc
+ " "
+ System.currentTimeMillis());
Thread.sleep(ms);
} catch (Exception e) {
}
p.configure();
}
}.run();
} else {
processor.configure();
}
} else if (event instanceof TimeoutEvent) {
if (receiveStream == null) {
// TODO: we might want to get the list of ReceiveStream-s from
// rtpManager and compare it to our list, to see if we should
// remove a stream.
logger.warn("TimeoutEvent: null.");
return;
}
// FMJ silently creates new ReceiveStream instances, so we have to
// recognize them by the SSRC.
ReceiveStreamDesc receiveStreamDesc = findReceiveStream(getReceiveStreamSSRC(receiveStream));
if (receiveStreamDesc != null) {
if (logger.isInfoEnabled()) {
logger.info("ReceiveStream timeout, ssrc=" + receiveStreamDesc.ssrc);
}
removeReceiveStream(receiveStreamDesc, true);
}
} else if (event != null && logger.isInfoEnabled()) {
logger.info("Unhandled ReceiveStreamEvent (" + event.getClass().getName() + "): " + event);
}
}