NewTOAPIA.Net.Rtp.RtpSession.ProcessSDESPacket C# (CSharp) Method

RtpSession Class Documentation Show file Open project: Wiladams/NewTOAPIA

ProcessSDESPacket() private method

An SdesPacket can contain multiple Sdes reports (ssrc, SdesData) which we process here Due to our architecture with 1 RtpSession / RtpParticipant and multiple RtpSenders / RtpStreams (each of which get their own ssrc and SdesData) it is difficult to properly map the SdesData to the participant, because they all share the same CName. The participant properties will have a CName, Name, Email, Phone, etc plus any private extensions for the participant. In order to conserve Rtcp bandwidth, the streams will only send out CName, Name and any private extensions for the stream. And the stream's Name may be completely different from the participant's name. The problem is that we don't want the participant to be updated from the stream's properties due to sharing a CName. So we use the private extension "Source" to distinguish between a participant's SdesData and a Stream's SdesData The last complication is that AccessGrid doesn't have this private extension, probably because they have a 1:1 mapping between a sender and receiver. In order to not break interop, we allow for the case of the private extension not being there, in which case the participant data will be updated from any and all SdesData that share that CName

private ProcessSDESPacket ( SdesPacket packet, IPAddress ipAddress ) : void
packet	SdesPacket	Rtcp packet to process
ipAddress	System.Net.IPAddress	Originating IP address of the packet
return	void

        private void ProcessSDESPacket(SdesPacket packet, IPAddress ipAddress)
        {
            foreach(SdesReport report in packet.Reports())
            {
                uint ssrc = report.ssrc;
                SdesData sdes = report.sdes;

                // Check for SSRC conflict
                AddSsrcToIp(ssrc, ipAddress);

                // Find out what source generated this data
                string role = sdes.GetPrivateExtension(Rtcp.PEP_SOURCE);

                if(role != null)
                {
                    // Update the participant's properties
                    if(role == Rtcp.PED_PARTICIPANT)
                    {
                        AddOrUpdateParticipant(ssrc, sdes, ipAddress);
                    }
                    else if(role == Rtcp.PED_STREAM)
                    {
                        if(RtpTraffic)
                        {
                            AddOrUpdateStream(ssrc, sdes);
                        }
                    }
                    else
                    {
                        Debug.Assert(false);
                        throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, 
                            Strings.UnsupportedRole, role));
                    }
                }
                else // Doesn't have CXP specific extensions
                {
                    // This code is not currently guaranteed to work
                    Debug.Assert(false);
                }
            }
        }

RtpSession

AddBye

AddOrUpdateParticipant

AddOrUpdateStream

AddParticipant

AddReceiverReport

AddSdes

AddSenderReport

AddSsrcToIp

CheckForCNameConflict

CheckForStaleParticipants

CheckForStaleStreams