CgwMonitorManage.T28181.SipStackAdapter.StartRecvStream C# (CSharp) Method

        public UInt32 StartRecvStream(string cameraCode, string domain, string iSipPort, string localPort)
        {
            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: SipStackAdapter.StartRecvStream  cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);

            try
            {
                //接收视频码流RTP端口号
                uint uiLocalRecvStreamVideoRtpPort = 0;
                //接收音频码流RTP端口号
                uint uiLocalRecvStreamAudioRtpPort = 0;
                //通道号
                UInt32 uiChannel = 0;
                //string strLocal = GetLocalIP(domain, Convert.ToInt32(iSipPort), Convert.ToInt32(localPort));

                if (string.IsNullOrEmpty(localIP))
                {
                    localIP = GetLocalIP(domain, Convert.ToInt32(iSipPort), Convert.ToInt32(localPort));
                }
                string strLocal = localIP;

                //获取可用通道
                NetSourcedInterface.IVS_NETSOURCE_GetChannel(ref uiChannel);

                //用户参数,4字节整数
                IntPtr pUser = Marshal.AllocHGlobal(4);
                Marshal.Copy(new int[1] { Convert.ToInt32(uiChannel) }, 0, pUser, 1);

                //设置媒体流回调函数
                NetSourcedInterface.IVS_NETSOURCE_SetDataCallBack(uiChannel, cbDataCallBack, pUser);
                //异常回调函数
                IVS_NETSOURCE_RESULT iRet = NetSourcedInterface.IVS_NETSOURCE_SetExceptionCallBack(cbNetExceptionCallBack, pUser);

                //协议类型 UDP
                iRet = NetSourcedInterface.IVS_NETSOURCE_SetProtocolType(uiChannel, 1);
                if (iRet != IVS_NETSOURCE_RESULT.SUCCESS)
                {
                    logEx.Error("SipStackAdapter.StartRecvStream.IVS_NETSOURCE_SetProtocolType failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    return CgwConst.T28181_ERROR_HANDLE;
                }

                iRet = NetSourcedInterface.IVS_NETSOURCE_SetLocalRecvStreamIP(uiChannel, localIP);
                if (iRet != IVS_NETSOURCE_RESULT.SUCCESS)
                {
                    logEx.Error("SipStackAdapter.StartRecvStream.IVS_NETSOURCE_SetLocalRecvStreamIP failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    return CgwConst.T28181_ERROR_HANDLE;
                }

                iRet = NetSourcedInterface.IVS_NETSOURCE_GetLocalRecvStreamPort(uiChannel, ref  uiLocalRecvStreamVideoRtpPort, ref  uiLocalRecvStreamAudioRtpPort);
                if (iRet != IVS_NETSOURCE_RESULT.SUCCESS)
                {
                    logEx.Error("SipStackAdapter.StartRecvStream.IVS_NETSOURCE_GetLocalRecvStreamPort failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    return CgwConst.T28181_ERROR_HANDLE;
                }

                //Invite消息体
                string strRealPlay = "v=0\r\n"
                                  + "o=" + cameraCode + @" 0 0 IN IP4 " + strLocal + "\r\n"
                                  + "s=Play\r\n"
                                  + "c=IN IP4 " + strLocal + "\r\n"
                                  + "t=0 0\r\n"
                                  + "m=video " + uiLocalRecvStreamVideoRtpPort + " RTP/AVP 96 98 97\r\n"
                                  + "a=recvonly\r\n"
                                  + "a=rtpmap:96 PS/90000\r\n"
                                  + "a=rtpmap:98 H264/90000\r\n"
                                  + "a=rtpmap:97 MPEG4/90000\r\n";

                //发送SIP Invite消息
                int iResponseID = 0;
                //制定字符串长度为1024
                StringBuilder strRemoteBody = new StringBuilder(1024);
                //发送SIP Invite消息
                EM_SIP_RESULT iSip = SIP_SDK_INVITE(cameraCode, strRealPlay, ref iResponseID, strRemoteBody);
                if (iSip != EM_SIP_RESULT.RET_SUCCESS)
                {
                    logEx.Error("SipStackAdapter.SIP_SDK_INVITE failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    return CgwConst.T28181_ERROR_HANDLE;
                }

                //源端发送码流IP;
                string pRemoteSendStreamIp = "";
                //源端发送视频码流RTP端口号
                uint uiRemoteSendStreamVideoPort = 0;
                GetInviteRemoteIPPort(strRemoteBody.ToString(), ref pRemoteSendStreamIp, ref uiRemoteSendStreamVideoPort);

                iRet = NetSourcedInterface.IVS_NETSOURCE_OpenNetStream(uiChannel, pRemoteSendStreamIp, uiRemoteSendStreamVideoPort, 0);//无音频，传入0
                if (iRet != IVS_NETSOURCE_RESULT.SUCCESS)
                {
                    logEx.Error("SipStackAdapter.StartRecvStream failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    return CgwConst.T28181_ERROR_HANDLE;
                }

                iRet = NetSourcedInterface.IVS_NETSOURCE_StartRecvStream(uiChannel);
                if (iRet == IVS_NETSOURCE_RESULT.SUCCESS)
                {
                    channelResponseIDDic.Add(uiChannel, iResponseID);
                    channelInPtrDic.Add(uiChannel, pUser);
                    logEx.Info("SipStackAdapter.StartRecvStream pChannel: {0}, cameraCode :{1},domain = {2},iSipPort ={3} ", uiChannel, cameraCode, domain, iSipPort);
                    return uiChannel;
                }
                else
                {
                    logEx.Error("SipStackAdapter.StartRecvStream failed. cameraCode :{0},domain = {1},iSipPort ={2}", cameraCode, domain, iSipPort);
                    StopRecvStream(uiChannel);
                    Marshal.FreeHGlobal(pUser);
                    return CgwConst.T28181_ERROR_HANDLE;
                }
            }
            catch (System.Exception ex)
            {
                logEx.Error("StartRecvStream failed.Exception message:{0},cameraCode :{0},domain = {1},iSipPort ={2}", ex.Message, cameraCode, domain, iSipPort);
                return CgwConst.T28181_ERROR_HANDLE;
            }
        }