void ProxyRTSPClient::continueAfterSETUP(int resultCode) {
if (resultCode != 0) {
// The "SETUP" command failed, so arrange to reset the state after the next RTSP 'liveness'
// command. (We don't do this now, because it deletes the "ProxyServerMediaSubsession",
// and we can't do that during "ProxyServerMediaSubsession::createNewStreamSource()".)
fResetOnNextLivenessTest = True;
envir().taskScheduler().rescheduleDelayedTask(fLivenessCommandTask, 0, sendLivenessCommand, this);
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();
if (p->fNext == fSetupQueueHead || p->fNext == p) { fprintf(stderr, "##### INTERNAL ERROR 1\n"); break; } //##### TEMP FOR DEBUGGING
}
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
if (fSetupQueueHead == NULL) fprintf(stderr, "##### INTERNAL ERROR 2\n"); else //##### TEMP FOR DEBUGGING
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);
}
}
}
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);
}
}
}
void ProxyRTSPClient::continueAfterOPTIONS(int resultCode) {
if (resultCode < 0) {
// The "OPTIONS" command failed without getting a response from the server (otherwise "resultCode" would have been >= 0).
// From this, we infer that the server (which had previously been running) has now failed - perhaps temporarily.
// We handle this by resetting our connection state with this server. Any current clients will have to time out, but
// subsequent clients will cause new RTSP "SETUP"s and "PLAY"s to get done, restarting the stream.
if (fVerbosityLevel > 0) {
envir() << *this << ": lost connection to server ('errno': " << -resultCode << "). Resetting...\n";
}
reset();
// Also "reset()" each of our "ProxyServerMediaSubsession"s:
ServerMediaSubsessionIterator iter(fOurServerMediaSession);
ProxyServerMediaSubsession* psmss;
while ((psmss = (ProxyServerMediaSubsession*)(iter.next())) != NULL) {
psmss->reset();
}
}
// Schedule the next RTSP "OPTIONS" command (to show client liveness):
scheduleLivenessCommand();
}
