// Create a new RTP session. If multicast is not being used then multicastIP
// should be set to an empty string.
static RTPSession createRtpSession(const std::string& multicastIP,
unsigned int port)
{
RTPSession session;
//if (setenv("LOGNAME", "video", 0) != 0) {
// throw std::runtime_error("Error setting LOGNAME environment variable");
//}
// Set up session params
RTPSessionParams sessionparams;
sessionparams.SetUsePollThread(false);
sessionparams.SetMaximumPacketSize(1400);
sessionparams.SetAcceptOwnPackets(true);
sessionparams.SetOwnTimestampUnit(1.0f/900000.0f);
sessionparams.SetResolveLocalHostname(false);
sessionparams.SetSessionBandwidth(9000000);
sessionparams.SetReceiveMode(RTPTransmitter::AcceptAll);
RTPUDPv4TransmissionParams transparams;
transparams.SetPortbase(port);
int status = session.Create(sessionparams, &transparams);
if (status < 0) {
throw std::runtime_error("Error creating RTP session");
}
// Join multicast groups if they are specified
if (multicastIP.size() > 0) {
if (!session.SupportsMulticasting()) {
throw std::runtime_error("Multicast not supported!");
} else {
int joinip = ntohl(inet_addr(multicastIP.c_str()));
RTPIPv4Address joinaddr(joinip, port);
int jstatus = session.JoinMulticastGroup(joinaddr);
if (jstatus < 0) {
throw std::runtime_error("Unable to join multicast group");
}
}
}
return session;
}
bool MediaStream::start(QHostAddress ip, int port, int localPort, int codecPayload )
{
if ( isRunning() )
stop();
printf("%s %d | %d | %d\n",ip.toString().toAscii().data(), port, localPort, codecPayload);
if(d->processThread == NULL)
d->processThread = new MediaThread(this);
d->outBufferPos = 0;
d->outBufferTime = 0;
// int localPort = 3000;
printf("getFactory(%d)\n", codecPayload);
VoiceCodecFactory *factory = CodecsManager::instance()->codecFactory(codecPayload);
if ( !factory ) {
printf("VoiceCodecFactory not found!\n");
return true;
}
d->codecPayload = codecPayload;
d->decoder = factory->decoder();
d->encoder = factory->encoder();
printf("transparams\n");
// Now, we'll create a RTP session and set the destination
// d->transparams.mediaChannel = mediaChannel;
// d->transparams.incomingPackets = incomingPackets;
d->transparams.SetPortbase(localPort);
RTPSessionParams sessparams;
sessparams.SetReceiveMode(RTPTransmitter::AcceptAll);
sessparams.SetOwnTimestampUnit(1.0/8000.0); // 8KHz
sessparams.SetAcceptOwnPackets(true);
printf("session.Create()\n");
int status = d->session.Create( sessparams, &d->transparams, RTPTransmitter::SynapseProto );
if ( status<0 ) {
qDebug("can't create RTP session, %s", RTPGetErrorString(status).c_str() );
d->session.Destroy();
return false;
}
printf("session.AddDestination()\n");
RTPIPv4Address addr(ip.toIPv4Address(),port);
status = d->session.AddDestination(addr);
if ( status<0 ) {
qDebug("can't add rtp destination, %s", RTPGetErrorString(status).c_str() );
d->session.Destroy();
return false;
}
d->session.SetDefaultPayloadType(codecPayload);
d->session.SetDefaultMark(false);
d->session.SetDefaultTimestampIncrement(160);
//initialise audio
status = Pa_Initialize();
//////////////////// FOR TESTING
if( status != paNoError ) {
qDebug( "PortAudio error: %s", Pa_GetErrorText(status) );
// stop();
// return true;
}
if(status == paNoError) {
status = Pa_OpenDefaultStream(
&d->audioStream,/* passes back stream pointer */
1, /* 1 input channel */
1, /* mono output */
paInt16, /* 16 bit fixed point output */
8000, /* sample rate */
240, /* frames per buffer */
16, /* number of buffers, if zero then use default minimum */
audioCallback, /* specify our custom callback */
d ); /* pass our data through to callback */
status = Pa_StartStream( d->audioStream );
if( status != paNoError ) {
qDebug( "PortAudio error: %s", Pa_GetErrorText(status) );
// stop();
// return true;
}
}
// put something to dsp buffer
/*
char emptyData[160*8];
memset( emptyData, 1, sizeof(emptyData) );
d->dspBuffer->lock();
d->dspBuffer->put( emptyData, sizeof(emptyData) );
d->dspBuffer->unlock();
*/
//d->timer.start(1,false);
d->isRunning = true;
d->processThread->start();
// qDebug("mediastream started");
printf("mediastream started\n");
return true;
} // }}}