海康摄像头报警输出输入接法

海康相机的报警输出是无源开关量信号

官方资料：https://hkrobot.hikvision.com/servlet/WBShow?action=sac&wbId=-100&sysNum=145716889796196&FromUserName=null&sId=325191&subId=136617

一、报警输入

二、报警输出

三、测试代码

public class CountPassengers
{
    public static void ProcessCommAlarm(ref CHCNetSDK.NET_DVR_ALARMER pAlarmer, IntPtr pAlarmInfo, uint dwBufLen, IntPtr pUser)
    {
        CHCNetSDK.NET_DVR_ALARMINFO struAlarmInfo = new CHCNetSDK.NET_DVR_ALARMINFO();

        struAlarmInfo = (CHCNetSDK.NET_DVR_ALARMINFO)Marshal.PtrToStructure(pAlarmInfo, typeof(CHCNetSDK.NET_DVR_ALARMINFO));

        if (struAlarmInfo.dwAlarmType == 0)
        {
            Console.WriteLine("状态：开盖儿");
        }
        else
        {
            Console.WriteLine(0);
        }
    }
    public static void cbMessageCallback(int lCommand, ref CHCNetSDK.NET_DVR_ALARMER pAlarmer, IntPtr pAlarmInfo, uint dwBufLen, IntPtr pUser)
    {
        switch (lCommand)
        {
            case 16384: //(DS-8000老设备)移动侦测、视频丢失、遮挡、IO信号量等报警信息
                ProcessCommAlarm(ref pAlarmer, pAlarmInfo, dwBufLen, pUser);
            break;
        }
    }
    
    public static void Main(string[] args)
    {
        Camera camera = new Camera();
        camera.CameraIp = "192.168.99.1";
        camera.CameraPort = 8000;
        camera.Username = "admin";
        camera.Password = "admin";
        HKService service = new HKService();
        HkCamera hkcamera = service.LoginCamera(camera);

        /*bool enable = true;
        ModelEnum modelEnum = ModelEnum.HK_MOVE_DETECTION;
        List<HKRegionParam> hKRegionParams = new List<HKRegionParam>();

        HkCameraManager.OrdinaryDetection(hkcamera,modelEnum,enable, hKRegionParams);*/
        CHCNetSDK.NET_DVR_SetDVRMessageCallBack_V50(1, (CHCNetSDK.MSGCallBack)cbMessageCallback, IntPtr.Zero);

        // Set up alarm parameters
        CHCNetSDK.NET_DVR_SETUPALARM_PARAM setupParam = new CHCNetSDK.NET_DVR_SETUPALARM_PARAM();
        setupParam.dwSize = (uint)Marshal.SizeOf(setupParam);

        // Start receiving alarm messages
        int alarmHandle = CHCNetSDK.NET_DVR_SetupAlarmChan_V41(hkcamera.UserId, ref setupParam);
        if (alarmHandle < 0)
        {
            Console.WriteLine("NET_DVR_SetupAlarmChan_V41 error!");
            CHCNetSDK.NET_DVR_Logout(hkcamera.UserId);
            CHCNetSDK.NET_DVR_Cleanup();
            return;
        }
        Console.WriteLine("Press any key to stop...");
        int flag = 1;
        while (true)
        {
            flag = (flag == 1) ? 0 : 1;
            // 设置报警输出
            CHCNetSDK.NET_DVR_SetAlarmOut(hkcamera.UserId, 0x00ff, flag);
            Thread.Sleep(5000);
        }
    }
}