海康设备网络SDK开发NET_DVR_GetDeviceConfig

由于官方的例子中没有关于NET_DVR_GetDeviceConfig的示例，在此记录一下“NET_DVR_GET_FIELD_DETECTION 获取区域入侵侦测配置” ，避免其他小伙伴踩坑。

这里只记录主要代码，其中的一些常量自行添加：

1、HCNetSDK.java文件中增加接口NET_DVR_GetDeviceConfig

	boolean NET_DVR_GetDeviceConfig(NativeLong lUserID, int dwCommand, int dwCount, Pointer lpInBuffer,
			int dwInBufferSize, Pointer lpStatusList, Pointer lpOutBuffer, int dwOutBufferSize);
	
	boolean NET_DVR_SetDeviceConfig(NativeLong lUserID, int dwCommand, int dwCount, Pointer lpInBuffer,
			int dwInBufferSize, Pointer lpStatusList, Pointer lpOutBuffer, int dwOutBufferSize);

2、lpInBuffer对应结构体

	public static class NET_DVR_CHANNEL_GROUP extends Structure {
		public int dwSize;
		public int dwChannel;
		public int dwGroup;
		public byte byID;
		public byte[] byRes1 = new byte[3];
		public int dwPositionNo;
		public byte[] byRes2 = new byte[56];
	}

3、lpOutBuffer对应结构体，其中的二维数组不要直接使用[][]

	public static class NET_VCA_FIELDDETECION extends Structure {
		public int dwSize;
		public byte byEnable; //使能，是否开启
		public byte byEnableDualVca;// 启用支持智能后检索 0-不启用，1-启用
		public byte byEnableHumanMisinfoFilter;// 启用人体去误报 0-不启用，1-启用
		public byte byEnableVehicleMisinfoFilter;// 启用车辆去误报 0-不启用，1-启用
		public NET_VCA_INTRUSION[] struIntrusion = new NET_VCA_INTRUSION[MAX_INTRUSIONREGION_NUM];//每个区域的参数设置
		// 不要使用手册上是二维数组[][]
		// public NET_DVR_SCHEDTIME[][] struAlarmSched = new NET_DVR_SCHEDTIME[MAX_DAYS][MAX_TIMESEGMENT_V30];
		public NET_DVR_SCHEDTIMEWEEK[] struAlarmSched = new NET_DVR_SCHEDTIMEWEEK[MAX_DAYS]; //布防时间
		public NET_DVR_HANDLEEXCEPTION_V40 struHandleException; //异常处理方式
		public int dwMaxRelRecordChanNum; //报警触发的录象通道 数（只读）最大支持数量
		public int dwRelRecordChanNum; //报警触发的录象通道 数 实际支持的数量
		public int[] byRelRecordChan = new int[MAX_CHANNUM_V30];//触发录像通道
		public NET_DVR_SCHEDTIME[] struHolidayTime = new NET_DVR_SCHEDTIME[MAX_TIMESEGMENT_V30]; //假日布防时间
		public byte[] byRes2 = new byte[100];
	}
	
	public static class NET_VCA_INTRUSION extends Structure {
		public NET_VCA_POLYGON struRegion;
		public short wDuration;
		public byte bySensitivity;
		public byte byRate;
		public byte byDetectionTarget;
		public byte byPriority;
		public byte byAlarmConfidence;
		public byte byRecordConfidence;
	}
	
	public static class NET_VCA_POLYGON extends Structure {
		public int dwPointNum;
		public NET_VCA_POINT[] struPos = new NET_VCA_POINT[VCA_MAX_POLYGON_POINT_NUM];
	}
	
	public static class NET_VCA_POINT extends Structure {
		public float fX;
		public float fY;
	}

4、主要逻辑代码

	public static void getAndSetFieldDetection() throws UnsupportedEncodingException {
		// 获取参数
		NET_DVR_CHANNEL_GROUP channelGroup = new NET_DVR_CHANNEL_GROUP();
		channelGroup.dwSize = channelGroup.size();
		channelGroup.dwChannel = 1;
		channelGroup.write();
		Pointer lpInBuffer = channelGroup.getPointer();
		NET_VCA_FIELDDETECION userCfg = new NET_VCA_FIELDDETECION();
		Pointer lpOutBuffer = userCfg.getPointer();
		IntByReference lpBytesReturned = new IntByReference(0);
		boolean flag = hCNetSDK.NET_DVR_GetDeviceConfig(lUserID, HCNetSDK.NET_DVR_GET_FIELD_DETECTION, 1,
				lpInBuffer, channelGroup.size(), lpBytesReturned.getPointer(), lpOutBuffer, userCfg.size());
		userCfg.read();
		if (!flag) {
			System.out.println("获取区域入侵侦测配置失败，错误码为" + hCNetSDK.NET_DVR_GetLastError());
			return;
		}else {
			System.out.println("获取区域入侵侦测配置成功");
		}
		System.out.println(userCfg.toString());
		
		// 设置参数
		userCfg.byEnable = 0;
		userCfg.write();
		flag = hCNetSDK.NET_DVR_SetDeviceConfig(lUserID, HCNetSDK.NET_DVR_SET_FIELD_DETECTION, 1,
				lpInBuffer, channelGroup.size(), lpBytesReturned.getPointer(), lpOutBuffer, userCfg.size());
		if (!flag) {
			System.out.println("设置区域入侵侦测配置失败，错误码为" + hCNetSDK.NET_DVR_GetLastError());
			return;
		}else {
			System.out.println("设置区域入侵侦测配置成功");
		}
	}

5、《设备网络SDK开发使用手册》上面都是C++类型，java开发者写数据类型的时候需要格外小心。

C++和Java类型对应：

DWORD-----int

WORD-----short

char-----byte

BYTE-----byte

指针-----Pointer