void AmB2BMedia::changeSessionUnsafe(bool a_leg, AmB2BSession *new_session)
{
TRACE("changing %s leg session to %p\n", a_leg ? "A" : "B", new_session);
if (a_leg) a = new_session;
else b = new_session;
bool needs_processing = a && b && a->getRtpRelayMode() == AmB2BSession::RTP_Transcoding;
// update all streams
for (AudioStreamIterator i = audio.begin(); i != audio.end(); ++i) {
// stop processing first to avoid unexpected results
i->a.stopStreamProcessing();
i->b.stopStreamProcessing();
// replace session
if (a_leg) {
i->a.changeSession(new_session);
}
else {
i->b.changeSession(new_session);
}
updateStreamPair(*i);
if (i->requiresProcessing()) needs_processing = true;
// reset logger (needed if a stream changes)
i->setLogger(logger);
// return back for processing if needed
i->a.resumeStreamProcessing();
i->b.resumeStreamProcessing();
}
for (RelayStreamIterator j = relay_streams.begin(); j != relay_streams.end(); ++j) {
AmRtpStream &a = (*j)->a;
AmRtpStream &b = (*j)->b;
// FIXME: is stop & resume receiving needed here?
if (a_leg)
a.changeSession(new_session);
else
b.changeSession(new_session);
}
if (needs_processing) {
if (!isProcessingMedia()) {
addToMediaProcessorUnsafe();
}
}
else if (isProcessingMedia()) AmMediaProcessor::instance()->removeSession(this);
TRACE("session changed\n");
}
void AmB2BMedia::updateAudioStreams()
{
// SDP was updated
TRACE("handling SDP change, A leg: %c%c, B leg: %c%c\n",
have_a_leg_local_sdp ? 'X' : '-',
have_a_leg_remote_sdp ? 'X' : '-',
have_b_leg_local_sdp ? 'X' : '-',
have_b_leg_remote_sdp ? 'X' : '-');
// if we have all necessary information we can initialize streams and start
// their processing
if (audio.empty() && relay_streams.empty()) return; // no streams
bool have_a = have_a_leg_local_sdp && have_a_leg_remote_sdp;
bool have_b = have_b_leg_local_sdp && have_b_leg_remote_sdp;
if (!(
(have_a || have_b)
)) return;
bool needs_processing = a && b && a->getRtpRelayMode() == AmB2BSession::RTP_Transcoding;
// initialize streams to be able to relay & transcode (or use local audio)
for (AudioStreamIterator i = audio.begin(); i != audio.end(); ++i) {
i->a.stopStreamProcessing();
i->b.stopStreamProcessing();
updateStreamPair(*i);
if (i->requiresProcessing()) needs_processing = true;
i->a.resumeStreamProcessing();
i->b.resumeStreamProcessing();
}
// start media processing (only if transcoding or regular audio processing
// required)
// Note: once we send local SDP to the other party we have to expect RTP but
// we need to be fully initialised (both legs) before we can correctly handle
// the media, right?
if (needs_processing) {
if (!isProcessingMedia()) {
addToMediaProcessorUnsafe();
}
}
else if (isProcessingMedia()) AmMediaProcessor::instance()->removeSession(this);
}