protected void ExtractAndNotifyPacket(byte[] bData)
{
/// See if we have enough data to examine the rest of our header, if not, wait until the
/// next time around
///
ByteBuffer.AppendData(bData);
while (true)
{
if (nCurrentLength == 0)
{
if (ByteBuffer.Size < 2)
{
return;
}
byte [] bLength = ByteBuffer.GetNSamples(2);
/// Little Endian for RTP, right?
nCurrentLength = (ushort)(bLength[0] | (bLength[1] << 8));
}
if (ByteBuffer.Size < nCurrentLength)
{
return;
}
else
{
byte [] bRTPPacket = ByteBuffer.GetNSamples(nCurrentLength);
RTPPacket packet = RTPPacket.BuildPacket(bRTPPacket);
ProcessRTPPacket(packet);
nCurrentLength = 0;
}
}
}
void OnRecvSocket(IAsyncResult result)
{
byte [] bBuffer = (byte [] )result.AsyncState;
try
{
EndPoint ep = (EndPoint)MulticastAddress;
int nRecv = MultiCastRecvSocket.EndReceiveFrom(result, ref ep);
// Notify the man of the incoming data
if (OnNewFrame != null)
{
byte[] bPacketCopy = new byte[nRecv];
Array.Copy(bBuffer, 0, bPacketCopy, 0, nRecv);
RTPPacket packet = RTPPacket.BuildPacket(bPacketCopy);
VideoFrameFragmentor.NewFragmentReceived(packet);
}
}
catch (Exception)
{
}
finally
{
BufferPool.Checkin(bBuffer);
}
DoReceive();
}
void RTPUDPClient_OnReceiveMessage(byte[] bData, int nLength, IPEndPoint epfrom, IPEndPoint epthis, DateTime dtReceived)
{
/// if we are an performing ICE, see if this is an ICE packet instead of an RTP one
if (nLength >= 8)
{
//0x2112A442
if ((bData[4] == 0x21) && (bData[5] == 0x12) && (bData[6] == 0xA4) && (bData[7] == 0x42))
{
/// STUN message
STUNMessage smsg = new STUN2Message();
byte[] bStun = new byte[nLength];
Array.Copy(bData, 0, bStun, 0, nLength);
try
{
smsg.Bytes = bStun;
}
catch (Exception ex)
{
smsg = new STUNMessage();
smsg.Bytes = bStun;
}
STUNRequestResponse foundreq = null;
lock (StunLock)
{
foreach (STUNRequestResponse queuedreq in StunRequestResponses)
{
if (queuedreq.IsThisYourResponseSetIfItIs(smsg) == true)
{
foundreq = queuedreq;
break;
}
}
if (foundreq != null)
{
StunRequestResponses.Remove(foundreq);
return;
}
}
if (OnUnhandleSTUNMessage != null)
{
OnUnhandleSTUNMessage(smsg, epfrom);
}
return;
}
}
RTPPacket packet = RTPPacket.BuildPacket(bData, 0, nLength);
if (packet != null) /// Seems we get some TURN channel data messages from google talk
{
if (ReceiveSSRC == 0)
{
ReceiveSSRC = packet.SSRC;
}
if ((packet.PayloadType == this.Payload) && (packet.SSRC == this.ReceiveSSRC))
{
IncomingRTPPacketBuffer.AddPacket(packet);
}
}
}
