海康威视多摄像头实时视频预览(基于SDK的二次开发)

其他 2018-09-11 19:18:56 阅读次数: 0

项目背景

   很久没有做工程项目了，最近突然接单，要做多摄像头下运动物体入侵检测及拌线检测，本文测试用到的摄像头是海康威视的DS-2CD23**D摄像头。


环境配置：

1.下载SDK

2.vs2010开发环境

3..opencv2.4.8

具体配置自行百度吧。下面贴上我这边的主要配置，需要注意的是需要在x64环境下编译。

将摄像头插入以太网口后，那么我们就可以通过官方提供的“设备网络搜索软件“——SADP工具，这个软件可以在海康威视的官方网站下载最新版本。本篇文章的很大程度上参照了lonelyrains的教程，在此基础上进行改进，同时在此表示感谢。


1.先在官网下载到SDK开发包：



下载下来SDK后我们解压，就可以看到里面包含一些开发文档以及一些Demo示例：



2.VS2010下环境配置

首先，配置属性---常规

1）输出目录：$(SolutionDir)\bin\

2.）中间目录：$(SolutionDir)\Temp\Compile\$(ProjectName)\$(ConfigurationName)




接着，配置属性---调试




VC++目录

包含目录：

..\include




opencv目录也要包含进来，继承值里如果没有的话



库目录：



接着C/C++

常规--附加包含目录 ../include/

链接器--常规 --附加库目录  ../lib/




链接器--输入--附加依赖项 

HCNetSDK.lib

ws2_32.lib
PlayCtrl.lib
winmm.lib
GdiPlus.lib
IPHlpApi.Lib



3.opencv配置，参见这里


视频采集

下面进入重点，实时视频采集。

先看看SDK里的demo函数，参见这里


代码如下：

NesunCamDriver.h 

添加了进程锁，由于考虑到项目保密性，下面开放部分源码。


.cpp源码开放出来：

#include "StdAfx.h"
#include "NesunCamDriver.h"
#include <windows.h>

IplImage * NesunCamDriver::m_pImg = NULL;
long NesunCamDriver::nPort = -1;
float NesunCamDriver::Scalefactor = 1.0f;
MTCMutex NesunCamDriver::m_hMutex;
HWND NesunCamDriver::m_hPlayWnd=NULL;
NesunCamDriver::NesunCamDriver(void)
	: lUserID(0)
	, lRealPlayHandle(-1)
{
	/*  Create a mutex Lock when a object create */
	//m_pImg = NULL;
	//hMutex = CreateMutex(NULL,FALSE,NULL);
	
}


NesunCamDriver::~NesunCamDriver(void)
{
	ReleaseCamera();
}



int NesunCamDriver::ReleaseCamera(void)
{
    if(!NET_DVR_StopRealPlay(lRealPlayHandle)){
        printf("NET_DVR_StopRealPlay error! Error number: %d\n",NET_DVR_GetLastError());
        return 0;
    }
    NET_DVR_Logout(lUserID);
    NET_DVR_Cleanup();
	
	cvReleaseImage(&m_pImg);//gavin++
	if (m_pImg)
	{
		m_pImg = NULL;
	}
	
    return 1;
}

void NesunCamDriver::InitHKNetSDK(void)
{
    /*  SDK Init                                 */
    NET_DVR_Init();
    /*  Set the Connect Time and Reconnect time  */
    NET_DVR_SetConnectTime(200, 1);
    NET_DVR_SetReconnect(10000, true);


}

CamHandle NesunCamDriver::InitCamera(char *sIP,char *UsrName,char *PsW, HWND hPlayWnd,int Port)
{
	m_hPlayWnd = hPlayWnd;
    NET_DVR_DEVICEINFO_V30 struDeviceInfo;
	memset(&struDeviceInfo,0,sizeof(NET_DVR_DEVICEINFO_V30));

    lUserID = NET_DVR_Login_V30(sIP, Port,UsrName,PsW, &struDeviceInfo);

    if (lUserID < 0){
        printf("Login error, %d\n", NET_DVR_GetLastError());
        NET_DVR_Cleanup();
        return -1;
    }

    NET_DVR_SetExceptionCallBack_V30(0, NULL,ExceptionCallBack, NULL);

    NET_DVR_CLIENTINFO ClientInfo;
    ClientInfo.lChannel = 1;                    /* Channel number Device channel number. */
	ClientInfo.hPlayWnd = NULL;					//NULL;  窗口为空，设备SDK不解码只取流	
    ClientInfo.lLinkMode = 0;                   /* Main Stream                           */
    ClientInfo.sMultiCastIP = NULL;

    lRealPlayHandle = NET_DVR_RealPlay_V30(lUserID,&ClientInfo,fRealDataCallBack,NULL,TRUE);

	if(-1 == lRealPlayHandle)
	{
		DWORD err=NET_DVR_GetLastError();
		printf("NET_DVR_RealPlay_V30 failed! Error number: %d\n", err);
		CString sErr;
		sErr.Format("播放出错,错误代码：%d",err);
		AfxMessageBox(sErr);
		return 0;
	}

    return lRealPlayHandle;
}

void CALLBACK  NesunCamDriver::DecCBFun(long nPort,char * pBuf,long nSize,FRAME_INFO * pFrameInfo, long nReserved1,long nReserved2)
{
    long lFrameType = pFrameInfo->nType;  
    char WindowName[15];
    static IplImage* pImgYCrCb =NULL;
    sprintf_s(WindowName,"Windows:%d",nPort);

    if(lFrameType ==T_YV12)
    {
		m_hMutex.Lock();

        /*    Single Camera decode 3.5%    */
	
		
		if(pImgYCrCb == NULL)
		{
			pImgYCrCb = cvCreateImage(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight), 8, 3);        
		}
		if (m_pImg == NULL)
		{
			m_pImg = cvCreateImage(cvSize((int)(pFrameInfo->nWidth*Scalefactor),(int)(pFrameInfo->nHeight*Scalefactor)), 8, 3); 
		}

        /*    CPU: 0.1%                    */
		
        yv12toYUV(pImgYCrCb->imageData, pBuf, pFrameInfo->nWidth,
                    pFrameInfo->nHeight,pImgYCrCb->widthStep);  

        cvResize(pImgYCrCb,m_pImg, CV_INTER_LINEAR);

        /*    CPU  3.4%                    */
        cvCvtColor(m_pImg,m_pImg,CV_YCrCb2RGB); 

        /*   1080p Video Display Need 3.5%
             per Cmaera                    */
        m_hMutex.UnLock();
		cvReleaseImage(&pImgYCrCb);//gavin++
    }
}

void CALLBACK  NesunCamDriver::ExceptionCallBack(DWORD dwType, LONG lUserID, LONG lHandle, void *pUser)
{
    char tempbuf[256] = {0};
    switch(dwType) 
    {
    case EXCEPTION_RECONNECT:    /* Reconnet when Error Happen */
        break;
    default:
        break;
    }
}

void NesunCamDriver::yv12toYUV(char *outYuv, char *inYv12, int width, int height,int widthStep)
{
    int col,row;
    unsigned int Y,U,V;
    int tmp;
    int idx;
    for (row=0; row<height; row++)
	{
        idx=row * widthStep;
        int rowptr=row*width;
        for (col=0; col<width; col++)
		{
            tmp = (row/2)*(width/2)+(col/2);
            Y=(unsigned int) inYv12[row*width+col];
            U=(unsigned int) inYv12[width*height+width*height/4+tmp];
            V=(unsigned int) inYv12[width*height+tmp];
            outYuv[idx+col*3]   = Y;
            outYuv[idx+col*3+1] = U;
            outYuv[idx+col*3+2] = V;
        }
    }
}
/*     Realtime Steam Callback           */
void CALLBACK NesunCamDriver::fRealDataCallBack(LONG lRealHandle,DWORD dwDataType,BYTE *pBuffer,DWORD dwBufSize,void *pUser)
{
    DWORD dRet;
    DWORD CameraIndex = 0;

    CameraIndex  = lRealHandle;
    printf("lRealHandle = %ld\n",CameraIndex);
    switch (dwDataType)
    {
        /*  System Head    */
        case NET_DVR_SYSHEAD:    
            if (!PlayM4_GetPort(&nPort))
				break;
            if(dwBufSize > 0)
			{
                if (!PlayM4_OpenStream(nPort,pBuffer,dwBufSize,1024*1024))
				{
                    dRet=PlayM4_GetLastError(nPort);
                    break;
                }
            
				//fix by gavin
				//设置解码回调函数 只解码不显示
				// 		if (!PlayM4_SetDecCallBack(nPort,DecCBFun))
				// 		{
				// 			dRet=PlayM4_GetLastError(nPort);
				// 			break;
				// 		}

				//设置解码回调函数 解码且显示
				if (!PlayM4_SetDecCallBackEx(nPort,DecCBFun,NULL,NULL))
				{
					dRet=PlayM4_GetLastError(nPort);
					break;
				}

				/*
                if (!PlayM4_Play(nPort,NULL))
				{
                    dRet=PlayM4_GetLastError(nPort);
                    break;
                }   */

				//打开视频解码
				if (!PlayM4_Play(nPort,m_hPlayWnd))
				{
					dRet=PlayM4_GetLastError(nPort);
					break;
				}

				//打开音频解码, 需要码流是复合流
				if (!PlayM4_PlaySound(nPort))
				{
					dRet=PlayM4_GetLastError(nPort);
					break;
				}
				break;
            }
            break;
        /* Code steam data    */
        case NET_DVR_STREAMDATA:   
            if (dwBufSize > 0 && nPort != -1) 
			{
                BOOL inData=PlayM4_InputData(nPort,pBuffer,dwBufSize);
                while (!inData)
				{
                    Sleep(10);
                    inData=PlayM4_InputData(nPort,pBuffer,dwBufSize);
                }
            }
            break;  
        }       
}

int NesunCamDriver::GetCamMat(Mat &Img,CamHandle handle,float factor)
{
    /*  Get the Port using handle    */
    int iPort = nPort;
    /*  Check the iPort is vaild     */
    if(iPort != -1)
	{
        //WaitForSingleObject(hMutex[iPort],INFINITE);
		m_hMutex.Lock();
        Mat(m_pImg).copyTo(Img);
        //ReleaseMutex(hMutex[iPort]);
		cvReleaseImage(&m_pImg);//gavin++
		m_pImg = NULL;//gavin++
		m_hMutex.UnLock();
		
        resize(Img,Img,cv::Size(),factor,factor);
        return 1;
    }
    /* If iPort is invaild, return 
       empty                         */
    return 0;
}

void NesunCamDriver::SetScaleFactor(float factor)
{
    Scalefactor = factor;
}


// 抓图保存到指定路径
int NesunCamDriver::CaptureImg(char* szPath,char* szError)
{
	FILE *file=NULL;
	static long iPicNum = 0;
	NET_DVR_JPEGPARA JpegPara;
	JpegPara.wPicQuality=0;
	JpegPara.wPicSize=0xff;

	char *JpegPicBuffer= new char[352*288*2]; 
	//这里的缓冲区大小需要根据抓图的分辨率大小自己调节，建议设置成2*图片的分辨率宽*图片的分辨率高
	LONG iPChannel = 1;//Channel number 设备通道号
	DWORD  SizeReturned=0;	
	BOOL bRet= NET_DVR_CaptureJPEGPicture_NEW(lUserID, iPChannel,&JpegPara,JpegPicBuffer,352*288*2,&SizeReturned);
	if (!bRet)
	{
		sprintf(szError, "NET_DVR_CaptureJPEGPicture_NEW failed! Error number: %d\n", NET_DVR_GetLastError());
		return 0;
	}
	
	if (file==NULL)
	{
		sprintf(szPath,"%s\\JpegCAP%d_%d.jpg",szPath,lUserID,iPicNum);
		file = fopen(szPath,"wb");
	}
	fwrite(JpegPicBuffer,SizeReturned,1,file);
	iPicNum++;

	delete JpegPicBuffer;
	fclose(file);
	file=NULL;
	return 1;
}

调用：

        CString strMode;
	GetDlgItemText(IDC_BT_PLAY, strMode);	
	if (_T("播放") == strMode)
	{
		m_hkCamDriver[0].InitHKNetSDK();
		m_hkCamDriver[0].SetScaleFactor(0.5f);

		Sleep(500);
		

		if (m_hkHandle[0] >= 0)
		{
			NET_DVR_StopRealPlay(m_hkHandle[0]);
			m_hkHandle[0] = -1;
		}

		//m_lPlayHandle = NET_DVR_RealPlay_V30(m_lUserID, &struPlayInfo, NULL, NULL, TRUE); 
		m_hkHandle[0] = m_hkCamDriver[0].InitCamera("192.168.1.222","admin","12345",m_hPlayWnd[0]);

		if (m_hkHandle[0] < 0)
		{
			char szTemp[128] = {0};
			sprintf(szTemp, "视频播放出错， %s", NET_DVR_GetErrorMsg());
			AfxMessageBox(szTemp);
		}

		GetDlgItem(IDC_BT_PLAY)->SetWindowText("停止");
		
	}
	else if (_T("停止") == strMode)
	{
		m_hkCamDriver[0].ReleaseCamera();
		GetDlgItem(IDC_BT_PLAY)->SetWindowText("播放");
	}
注意对应窗口显示区域，HWND m_hPlayWnd[12]；

m_hPlayWnd[0] = GetDlgItem(IDC_STATIC_PLAY)->GetSafeHwnd();


其他参考：

1.https://blog.csdn.net/log_zhan/article/details/75041352#commentsedit

2.https://blog.csdn.net/qq_15029743/article/details/79733960

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