关于回调函数怎样改写成c#

ab_study_c 2010-07-05 01:34:01

关于回调函数怎样改写成c#:
BOOL NET_DVR_SetDVRMessageCallBack_V30(
MSGCallBack fMessageCallBack,
void *pUser
);

其中:fMessageCallBack 是回调函数

typedef void(CALLBACK *MSGCallBack)(
LONG lCommand,
NET_DVR_ALARMER *pAlarmer,
char *pAlarmInfo,
DWORD dwBufLen,
void *pUser
);

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liangbudao 2011-10-17

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请高手帮忙看看这段C#调用dll的回调函数的代码为什么运行C#程序总是提示写入受保护的内存，是不是哪个数据类型写错了，在线等待

/**********************************vc++**********************************************/

typedef struct VIDEO_INFO

{

	int nVideoWidth;/**< 像素宽度 */

	int nVideoHeight;/**< 像素高度 */

	int nVideoFPS;/**< 每秒多少帧 */

	unsigned char data[58];/**< 解码信息头 */

	DWORD dataSize;/**< 解码信息头长度 */

	struct timeval presentationTime;/**< 解码信息头时间戳 */

}VIDEO_INFO;





/** @brief 报警信息结构体 */

typedef struct MSG_INFO 

{

	char ip[16];/**< 报警设备IP */

	long object_id;/**< 对象ID */

	long rule_name;/**< 参考枚举 Rule_name */

	long rule_id;/**< 规则ID */

	double rel_center_x;

	double rel_center_y;

	double rel_dimension_x;

	double rel_dimension_y;

	double rel_velocity_x;

	double rel_velocity_y;

	long preset_id;

	double direction;

	double time_in_rule;

	double range;

}MSG_INFO;





typedef void (CALLBACK *MSGCallBack)(LONG lCommand,LONG nID,int nCh, char *pAlarmInfo, DWORD dwBufLen, void* Context);//报警回调函数

/**	

* @brief							视频流回调函数

* @param nStreamID					视频流的索引ID,AIIVS_OpenStream返回的

* @param nID						设备索引ID,AIIVS_Connect返回的

* @param nCh						设备的通道号

* @param pBuffer					视频流帧数据

* @param dwBufSize					帧数据长度

* @param presentationTime			此帧时间戳

* @param RealDataCallBackContext	AIIVS_OpenStream时候 RealDataCallBackContext传进的值

* @return 无返回值

*/

typedef void (CALLBACK *fRealDataCallBack) (LONG nStreamID,LONG nID, int nCh, const unsigned char *pBuffer, DWORD dwBufSize,struct timeval presentationTime, void* RealDataCallBackContext);//视频流回调



AIIVS_API void __stdcall	AIIVS_Init();//初始化SDK



AIIVS_API LONG __stdcall	AIIVS_Connect(char * sIp, int nPort , char * sName , char * sPwd ,MSGCallBack pMsgCallBack = NULL, void * Context = NULL);  //连接IVS设备

AIIVS_API int __stdcall		AIIVS_OpenStream(LONG nID , int nCh,fRealDataCallBack pRealDataCallBack = NULL,void *RealDataCallBackContext = NULL);//开启视频流,返回通道流ID



AIIVS_API int __stdcall		AIIVS_GetHeadStream(LONG nID , int nCh,VIDEO_INFO *pVideoInfo);//获取视频流头部





IVSPLAY_API BOOL _stdcall IVS_PLAY_Init();//初始化

IVSPLAY_API LONG _stdcall IVS_PLAY_OpenStream(HWND hWnd,VIDEO_INFO *pVideo_info,bool bRealdecode = true);//打开流播放

/*********************************C#*******************************************/



 public const string aiIvs = "AIIVS.dll";

        public delegate void MSGCallBack(long lCommand,long nID,int nCh, ref MSG_INFO pAlarmInfo,uint dwBufLen,ref int Context);

        public delegate void fRealDataCallBack(long nStreamID, long nID, int nCh, byte[] pBuffer, uint dwBufSize, timeval presentationTime,ref int RealDataCallBackContext);





    [StructLayout(LayoutKind.Sequential, Pack = 1)]

    public struct VIDEO_INFO

    {

	 public int nVideoWidth;//视频像素宽度

	 public int nVideoHeight;//视频像素高度

	 public int nVideoFPS;//视频每秒播放帧数

	 public byte[] data;//解码头

	 public int dataSize;//解码头长度

	 public timeval presentationTime;//解码头时间戳

    }





    [StructLayout(LayoutKind.Sequential, Pack = 1)]

    public struct MSG_INFO

    {

        public string ip;/**报警设备IP */

        public long object_id;/**对象ID */

        public long rule_name;/**参考枚举 Rule_name */

        public long rule_id;/**规则ID */

        public double rel_center_x;

        public double rel_center_y;

        public double rel_dimension_x;

        public double rel_dimension_y;

        public double rel_velocity_x;

        public double rel_velocity_y;

        public long preset_id;

        public double direction;

        public double time_in_rule;

        public double range;

    }

    public struct timeval

    {

       public long tv_sec;

       public long tv_usec;

    }





        [DllImport(aiIvs]

        public static extern void AIIVS_Init();



        [DllImport(aiIvs]

        public static extern long AIIVS_Connect(string sIp, int nPort , string sName , string sPwd ,MSGCallBack pMsgCallBack, ref int Context);

        [DllImport(aiIvs, EntryPoint = "_AIIVS_OpenStream@16")]

        public static extern int AIIVS_OpenStream(ref long nID ,ref int nCh,ref fRealDataCallBack pRealDataCallBack, ref int RealDataCallBackContext);//开启视频流,返回通道流ID





        public const string ivsPlay = "IVSPlay.dll";

        [DllImport(ivsPlay]

        public static extern bool IVS_PLAY_Init();

        [DllImport(ivsPlay]

        public static extern long IVS_PLAY_OpenStream(IntPtr hWnd,ref VIDEO_INFO pVideo_info, bool bRealdecode);



    public partial class frmVido : Form

    {

        public frmVido()

        {

            InitializeComponent();

        }

        public int n_lUserID = -1;

        public int RealDataCallBackContext = -1;

        public IvsAPI.MSGCallBack MsgBack;

        public IvsAPI.fRealDataCallBack FrdcBack;

        private void frmVido_Load(object sender, EventArgs e)

        {

            IvsAPI.AIIVS_Init();

            VIDEO_INFO video = new VIDEO_INFO();

            MsgBack = new IvsAPI.MSGCallBack(msgCallBack);

            FrdcBack = new IvsAPI.fRealDataCallBack(frcBack);

            int ibi = 0;







            long ll = IvsAPI.AIIVS_Connect("192.168.1.15", 80, "admin", "admin",MsgBack, ref n_lUserID);

            int ii = IvsAPI.AIIVS_OpenStream(ref ll, ref ibi,ref FrdcBack, ref RealDataCallBackContext);

            int it = IvsAPI.AIIVS_GetHeadStream(ll, 1, ref video);

            bool bolt = PlayAPI.IVS_PLAY_Init();

            long lon = PlayAPI.IVS_PLAY_OpenStream(pictureBox1.Handle, ref video, true);

        }

        private void ListenAlarmThreadProc()

        {

        }

        private void msgCallBack(long lCommand, long nID, int nCh, ref MSG_INFO pAlarmInfo, uint dwBufLen, ref int Context)

        {

            MessageBox.Show("成功");

        }

        private void frcBack(long nStreamID, long nID, int nCh, byte[] pBuffer, uint dwBufSize, timeval presentationTime,ref int RealDataCallBackContext)

        {

            bool bol1 = PlayAPI.IVS_PLAY_InputData(nStreamID, pBuffer, dwBufSize);

        }

    }

zhenlisuozai 2010-10-11

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同理，请问转成vb.net怎么转，谢谢！

ab_study_c 2010-07-13

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好的,谢谢了,先试试

Baesky 2010-07-13

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BOOL NET_DVR_SetDVRMessageCallBack_V30(

  MSGCallBack fMessageCallBack,

  void *pUser

);



BOOL NET_DVR_SetDVRMessageCallBack_V30(

  in MSGCallBack fMessageCallBack,

  in IntPtr pUser

);



Callback Function

typedef void(CALLBACK *MSGCallBack)(

  LONG lCommand,

  NET_DVR_ALARMER *pAlarmer,

  char *pAlarmInfo,

  DWORD dwBufLen,

  void *pUser

);



 delegate void MSGCallBack(

  Int64 lCommand,

  ref NET_DVR_ALARMER pAlarmer,

  string pAlarmInfo,

  Int32 dwBufLen,

  IntPtr pUser

);

兔子-顾问 2010-07-13

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public class User

{

   ....你定义

}

public class NET_DVR_ALARMER

{

   ....你定义

}



public delegate MSGCallBackDelegate(long lCommand,ref NET_DVR_ALARMER pAlarmer,StringBuilder pAlarmInfo,uint dwBufferLen,ref User puser);



在声明一个这样签名的方法

public MSGCallBackMethod(long lCommand,ref NET_DVR_ALARMER pAlarmer,StringBuilder pAlarmInfo,uint dwBufferLen,ref User puser)

{

    ......

}

定义一个成员字段：MSGCallBackDelegate MSGCallBack;



调用

MSGCallBack = new MSGCallBack(MSGCallBackMethod);

调用时候用这个MSGCallBack

I520WUCHAN 2010-07-13

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学习了.

兔子-顾问 2010-07-13

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很简单的一个结构

Callback Function
typedef void(CALLBACK *MSGCallBack)(
LONG lCommand,
NET_DVR_ALARMER *pAlarmer,
char *pAlarmInfo,
DWORD dwBufLen,
void *pUser
);
你需要首先声明
NET_DVR_ALARMER
结构体
LONG->long
char*->StringBuilder
DWORD->uint
void*这个要看看实际对应是什么。

ab_study_c 2010-07-13

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还是没搞懂........

qqiuzaihui 2010-07-09

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参考

ab_study_c 2010-07-09

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请哪位帮帮忙改一下.

微醺_zZ 2010-07-09

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用AJAX去调写在C#中的函数就可以了吧？

yuanhuiqiao 2010-07-06

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Unsafe编程

ab_study_c 2010-07-06

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谢谢各位.

是这样的:此函数是海康sdk里的,原是用其所长C++写的,

NET_DVR_SetDVRMessageCallBack_V30注册回调函数，接收设备报警消息等。

BOOL NET_DVR_SetDVRMessageCallBack_V30(
MSGCallBack fMessageCallBack,
void *pUser
);
Parameters
fMessageCallBack
[in] 回调函数
pUser
[in] 用户数据

Callback Function
typedef void(CALLBACK *MSGCallBack)(
LONG lCommand,
NET_DVR_ALARMER *pAlarmer,
char *pAlarmInfo,
DWORD dwBufLen,
void *pUser
);

Callback Function Parameters
lCommand
上传的消息类型，见下表宏定义宏定义值含义
COMM_ALARM 0x1100 V3.0以下版本支持的设备的报警信息上传
COMM_ALARM_RULE 0x1102 行为分析信息上传
COMM_TRADEINFO 0x1500 ATM DVR交易信息上传
COMM_ALARM_V30 0x4000 V3.0以上版本支持的设备的报警信息上传
COMM_IPCCFG 0x4001 混合型DVR在IPC接入配置改变时的报警信息上传
COMM_IPCCFG_V31 0x4002 混合型DVR在IPC接入配置改变时的报警信息上传（扩展）

pAlarmer
报警设备信息
pAlarmInfo
报警信息
dwBufLen
报警信息缓存大小
pUser
用户数据
Return Values
TRUE表示成功，FALSE表示失败。获取错误码调用NET_DVR_GetLastError

Remarks
该接口中回调函数的第一个参数（lCommand）和第三个参数（pAlarmInfo）是密切关联的，其关系见下表：消息类型（lCommand）上传内容 pAlarmInfo对应的结构体
COMM_ALARM V3.0以下版本支持的设备的报警信息 NET_DVR_ALARMINFO
COMM_ALARM_RULE 行为分析信息 NET_VCA_RULE_ALARM
COMM_TRADEINFO ATM DVR交易信息 NET_DVR_TRADEINFO
COMM_ALARM_V30 V3.0以上版本支持的设备的报警信息 NET_DVR_ALARMINFO_V30
COMM_IPCCFG 混合型DVR在IPC接入配置改变时的报警信息 NET_DVR_IPALARMINFO
COMM_IPCCFG_V31 混合型DVR在IPC接入配置改变时的报警信息（扩展） NET_DVR_IPALARMINFO

现在的问题是不知怎样改写成c#