CgwMonitorManage.T28181.T28181VideoMonitor.StopReceiveVideo C# (CSharp) Method

        public SmcErr StopReceiveVideo(string cameraNo)
        {
            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: T28181VideoMonitor.StopReceiveVideo({0}).", cameraNo);
            SmcErr err = new CgwError();
            //需要停止的预览句柄
            uint needToStopChannel = 0;
            if (this.handelOperateLock.TryEnterWriteLock(CgwConst.ENTER_LOCK_WAIT_TIME))
            {
                try
                {
                    if (this.cameraVideoChannelDic.ContainsKey(cameraNo))
                    {
                        needToStopChannel = this.cameraVideoChannelDic[cameraNo];
                        this.videoChannelDataSenderDic.Remove(needToStopChannel);
                        this.cameraVideoChannelDic.Remove(cameraNo);

                        //用户参数,4字节整数
                        IntPtr pUser = Marshal.AllocHGlobal(4);
                        NetSourcedInterface.IVS_NETSOURCE_SetDataCallBack(needToStopChannel, null, pUser);

                        //释放NETSOURCE通道资源
                        IVS_NETSOURCE_RESULT iNet = NetSourcedInterface.IVS_NETSOURCE_CloseNetStream(needToStopChannel);
                        if (iNet != IVS_NETSOURCE_RESULT.SUCCESS)
                        {
                            logEx.Error("IVS_NETSOURCE_CloseNetStream failed channel={0}", needToStopChannel);
                            err.SetErrorNo(CgwError.STOP_RECEIVE_VIDEO_FAILED);
                        }

                        //关闭rtp回调
                        rtpAdapter.ESDK_RTP_CloseChannel(needToStopChannel);
                    }
                    else
                    {
                        logEx.Warn("Stop Receive camera video data failed. Don't need to end the preview.Camera No:{0}.", cameraNo);
                        //如果预览句柄不存在，不需要处理，直接返回
                        return err;
                    }
                }
                catch (Exception ex)
                {
                    err.SetErrorNo(CgwError.STOP_RECEIVE_VIDEO_FAILED);
                    logEx.Error("Stop Receive camera video data failed.Execption message:{0}", ex.Message);
                    return err;
                }
                finally
                {
                    this.handelOperateLock.ExitWriteLock();
                }
            }

            //调用sdk的停止方法，放在handelOperateLock外面，防止长时间占用锁
            if (needToStopChannel != 0)
            {
                EM_SIP_RESULT iRet = sipStack.StopRecvStream(needToStopChannel);
                //如果不为0，表示预览失败
                if (iRet != EM_SIP_RESULT.RET_SUCCESS)
                {
                    err.SetErrorNo(CgwError.STOP_RECEIVE_VIDEO_FAILED);
                    logEx.Error("Stop Receive camera video data failed. error code:{0}", iRet);
                    return err;
                }
                logEx.Info("Stop Receive camera video data success.Camera No:{0},Handle:{1}.", cameraNo, needToStopChannel);
            }

            return err;
        }