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;
}