void ProxyRTSPClient::continueAfterPLAY(int resultCode) {
if (resultCode != 0) {
// The "PLAY" command failed, so reset the connection with the 'back-end' server and start over,
// just as if a periodic 'liveness' check with the 'back-end' server had failed:
continueAfterLivenessCommand(resultCode, fServerSupportsGetParameter);
}
}
void ProxyRTSPClient::checkInterPacketGaps_() {
if (fInterPacketGapMaxTime == 0) return; // we're not checking
// Check each subsession, counting up how many packets have been received:
unsigned newTotNumPacketsReceived = 0;
MediaSubsessionIterator iter(*fOurServerMediaSession.fClientMediaSession);
MediaSubsession* subsession;
while ((subsession = iter.next()) != NULL) {
RTPSource* src = subsession->rtpSource();
if (src == NULL) continue;
newTotNumPacketsReceived += src->receptionStatsDB().totNumPacketsReceived();
}
//envir() << *this << "::doLivenessCheck fTotNumPacketsReceived: " << fTotNumPacketsReceived
// << ", newTotNumPacketsReceived: " << newTotNumPacketsReceived << "\n";
if (newTotNumPacketsReceived == fTotNumPacketsReceived) {
// No additional packets have been received since the last time we
// checked, so end this stream:
// *env << "Closing session, because we stopped receiving packets.\n";
if (fVerbosityLevel > 0) {
envir() << *this << "::doLivenessCheck last packet received: >" << fInterPacketGapMaxTime
<< " seconds ago. Resetting session\n";
}
continueAfterLivenessCommand(1/*hack*/, fServerSupportsGetParameter);
} else {
fTotNumPacketsReceived = newTotNumPacketsReceived;
// Check again, after the specified delay:
fInterPacketGapsTask = envir().taskScheduler().scheduleDelayedTask(fInterPacketGapMaxTime*MILLION, checkInterPacketGaps, this);
}
}
void ProxyRTSPClient::continueAfterSETUP(int resultCode) {
if (resultCode != 0) {
// The "SETUP" command failed, so reset the connection with the 'back-end' server and start over,
// just as if a periodic 'liveness' check with the 'back-end' server had failed:
continueAfterLivenessCommand(resultCode, fServerSupportsGetParameter);
return;
}
if (fVerbosityLevel > 0) {
envir() << *this << "::continueAfterSETUP(): head codec: " << fSetupQueueHead->codecName()
<< "; numSubsessions " << fSetupQueueHead->fParentSession->numSubsessions() << "\n\tqueue:";
for (ProxyServerMediaSubsession* p = fSetupQueueHead; p != NULL; p = p->fNext) {
envir() << "\t" << p->codecName();
}
envir() << "\n";
}
envir().taskScheduler().unscheduleDelayedTask(fSubsessionTimerTask); // in case it had been set
// Dequeue the first "ProxyServerMediaSubsession" from our 'SETUP queue'. It will be the one for which this "SETUP" was done:
ProxyServerMediaSubsession* smss = fSetupQueueHead; // Assert: != NULL
fSetupQueueHead = fSetupQueueHead->fNext;
if (fSetupQueueHead == NULL) fSetupQueueTail = NULL;
if (fSetupQueueHead != NULL) {
// There are still entries in the queue, for tracks for which we have still to do a "SETUP".
// "SETUP" the first of these now:
sendSetupCommand(fSetupQueueHead->fClientMediaSubsession, ::continueAfterSETUP,
False, fStreamRTPOverTCP, False, fOurAuthenticator);
++fNumSetupsDone;
fSetupQueueHead->fHaveSetupStream = True;
} else {
if (fNumSetupsDone >= smss->fParentSession->numSubsessions()) {
// We've now finished setting up each of our subsessions (i.e., 'tracks').
// Continue by sending a "PLAY" command (an 'aggregate' "PLAY" command, on the whole session):
sendPlayCommand(smss->fClientMediaSubsession.parentSession(), ::continueAfterPLAY, -1.0f, -1.0f, 1.0f, fOurAuthenticator);
// the "-1.0f" "start" parameter causes the "PLAY" to be sent without a "Range:" header, in case we'd already done
// a "PLAY" before (as a result of a 'subsession timeout' (note below))
fLastCommandWasPLAY = True;
} else {
// Some of this session's subsessions (i.e., 'tracks') remain to be "SETUP". They might get "SETUP" very soon, but it's
// also possible - if the remote client chose to play only some of the session's tracks - that they might not.
// To allow for this possibility, we set a timer. If the timer expires without the remaining subsessions getting "SETUP",
// then we send a "PLAY" command anyway:
fSubsessionTimerTask
= envir().taskScheduler().scheduleDelayedTask(SUBSESSION_TIMEOUT_SECONDS*MILLION, (TaskFunc*)subsessionTimeout, this);
}
}
}
