int RTPSession::Create(int localportbase,unsigned long localip)
{
int status;
if (initialized)
return ERR_RTP_SESSIONALREADYINITIALIZED;
if ((status = rtpconn.Create(localportbase,localip)) < 0)
return status;
if ((status = contribsources.CreateLocalCNAME()) < 0)
{
rtpconn.Destroy();
return status;
}
CreateNewSSRC();
localinf.CreateSessionParameters();
rtcpmodule.Initialize();
initialized = true;
return 0;
}
int RTPPacketBuilder::Init(size_t max)
{
if (init)
return ERR_RTP_PACKBUILD_ALREADYINIT;
if (max <= 0)
return ERR_RTP_PACKBUILD_INVALIDMAXPACKETSIZE;
maxpacksize = max;
buffer = new uint8_t [max];
if (buffer == 0)
return ERR_RTP_OUTOFMEM;
packetlength = 0;
CreateNewSSRC();
deftsset = false;
defptset = false;
defmarkset = false;
numcsrcs = 0;
init = true;
return 0;
}
int RTPPacketBuilder::Init(size_t max)
{
if (init)
return ERR_RTP_PACKBUILD_ALREADYINIT;
if (max <= 0)
return ERR_RTP_PACKBUILD_INVALIDMAXPACKETSIZE;
maxpacksize = max;
buffer = RTPNew(GetMemoryManager(),RTPMEM_TYPE_BUFFER_RTPPACKETBUILDERBUFFER) uint8_t [max];
if (buffer == 0)
return ERR_RTP_OUTOFMEM;
packetlength = 0;
CreateNewSSRC();
deftsset = false;
defptset = false;
defmarkset = false;
numcsrcs = 0;
init = true;
return 0;
}
int RTPSession::PollData()
{
int status,len,port,prevnumsources;
unsigned char *data;
unsigned long ip,curtime;
bool collis;
if (!initialized)
return ERR_RTP_SESSIONNOTCREATED;
/* Save the number of sources for comparison */
prevnumsources = sources.GetNumberOfParticipants();
/* Process data on RTP port */
if ((status = rtpconn.PollRTP()) < 0)
return status;
while (rtpconn.RTPDataAvailable())
{
if ((status = rtpconn.ReceiveRTPData(&data,&len,&ip,&port)) < 0)
return status;
// the packet processor deletes 'data' in case of an error
if ((status = packetprocessor.ProcessRTPBlock(data,len,ip,port,&collis,acceptownpackets,localinf.tsunit)) < 0)
return status;
if (collis) // collision with local ssrc
{
if ((status = rtcpmodule.SendBYE()) < 0)
return status;
CreateNewSSRC();
localinf.octetcount = 0;
localinf.packetcount = 0;
}
}
/* Process data on RTCP port */
if ((status = rtpconn.PollRTCP()) < 0)
return status;
while (rtpconn.RTCPDataAvailable())
{
if ((status = rtpconn.ReceiveRTCPData(&data,&len,&ip,&port)) < 0)
return status;
// the packet processor deletes 'data' in case of an error
if ((status = packetprocessor.ProcessRTCPBlock(data,len,ip,port,&collis,localinf.tsunit)) < 0)
return status;
if (collis) // collision with local ssrc
{
if ((status = rtcpmodule.SendBYE()) < 0)
return status;
CreateNewSSRC();
localinf.octetcount = 0;
localinf.packetcount = 0;
}
}
/* Check if any sources have joined or left */
if (sources.GetNumberOfParticipants() != prevnumsources)
rtcpmodule.CalcNextRTCPTime();
/* Check if we have to send RTCP packets */
curtime = time(NULL);
if (rtcpmodule.RTCPCheck(curtime))
{
status = rtcpmodule.RTCPRoutine(curtime);
if (status < 0)
return status;
}
return 0;
}
