how to render the video from the camera to a Picture Control?

Question

I don't know the whole procedure.

void tabTwo::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 DDX_Control(pDX, IDC_PICTURE, m_hWndCap);
}


void tabTwo::OnBnClickedStart()
{
 DWORD fsize;
 capSetCallbackOnError(m_hWndCap,(FARPROC)ErrorCallbackProc);
 capSetCallbackOnStatus(m_hWndCap,(FARPROC)StatusCallbackProc);
 capSetCallbackOnVideoStream(m_hWndCap,(FARPROC)VideoCallbackProc);
 capDriverConnect(m_hWndCap,0);
 capDriverGetCaps(m_hWndCap,&m_caps,sizeof(CAPDRIVERCAPS));
 
 if ( m_caps.fHasOverlay )
  capOverlay(m_hWndCap,TRUE);
 capPreviewRate(m_hWndCap,1000/25);
 capPreview(m_hWndCap,bPreview);

 fsize = capGetVideoFormatSize(m_hWndCap);
 capGetVideoFormat(m_hWndCap,lpbiIn,fsize);

 

 CRect rect;
 m_hWndCap.GetWindowRect(&rect);
 HWND m_hCapWnd = capCreateCaptureWindow(_T(""),NULL,0,0,rect.Width(),rect.Height(),m_hWndCap.GetSafeHwnd(),0);
    ASSERT(m_hCapWnd);

 if ( capDriverConnect(m_hCapWnd,0) )
 {

 }
}

Answer 1

Modern cameras should support WIA. old cameras may have their own SDK. Contact the hardware producer for details.

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Answer 2

My camera supports WIA. I just want to know the process.  Thank you.

#include "stdafx.h"
#include "FTP.h"
#include "tabTwo.h"

#pragma comment(lib,"vfw32.lib")

    unsigned char bufo[XDIM*YDIM*3+40];//???
	HIC  hic1;
	HIC  hic2;
	LPBITMAPINFO lpbiIn;
	LPBITMAPINFO lpbiTmp;
	LPBITMAPINFO lpbiOut;
	COMPVARS     pc;
	BOOL         IsKeyFrame;
	BOOL         bSaveAVI=FALSE;
	long         FrameSize;
	int          CurrentID;
	BOOL         bPreview = FALSE;
	int          nStreamLength;
	int          nOstreamSize;
	CFrameWnd    m_wndSource;
	HWND         m_hWndCap;
	CRect        disRect;
	enum         VFW_STATE{PREVIEW,ENCDEC};
	VFW_STATE    m_vfwSate = PREVIEW;
	CAPDRIVERCAPS m_caps;

LRESULT CALLBACK EXPORT ErrorCallbackProc(HWND hWnd, int nErrID, LPSTR lpErrorText)
{
	if ( nErrID == 0 )
		return TRUE;
	MessageBox(NULL,(LPCWSTR)lpErrorText,_T(""),MB_OK);
	return TRUE;
	
}

LRESULT FAR PASCAL StatusCallbackProc(HWND hWnd,int nID,LPSTR lpStatusText)
{
	if ( nID == IDS_CAP_END )
	{
		if ( ( CurrentID == IDS_CAP_STAT_VIDEOAUDIO) || (CurrentID==IDS_CAP_STAT_VIDEOONLY) )
		{
			return TRUE;
		}
	}
	CurrentID = nID;
	return  TRUE;
}

LRESULT FAR PASCAL VideoCallbackProc(HWND hWnd, LPVIDEOHDR lpVHdr)
{
	unsigned char *bufi, *buf;
	bufi = new unsigned char[lpVHdr->dwBytesUsed+40];
	buf = new unsigned char[lpVHdr->dwBytesUsed];
	memcpy((void*)(bufi),lpVHdr->lpData,lpVHdr->dwBytesUsed); //???
	unsigned char * buf1;
	buf1 = buf;

	if ( m_vfwSate == ENCDEC )
	{
		buf1 = (unsigned char*)ICSeqCompressFrame(&pc,0,bufi,&IsKeyFrame,&FrameSize);
		
		/*if ( bSaveAVI )
		{
			AVIStreamSetFormat(pMainFrame->ps,pMainFrame->m_Frame++,lpbiTmp,sizeof(BITMAPINFO));
			AVIStreamWrite(pMainFrame->ps,pMainFrame->m_Frame,1,(LPBYTE)buf1,FrameSize,AVIIF_KEYFRAME,NULL,NULL);
		}*/
		ICDecompress(hic2,0,&lpbiTmp->bmiHeader,buf1,&lpbiOut->bmiHeader,&bufo[40]);
	}
	else
	{
		memcpy(&buf[40],bufi,lpVHdr->dwBytesUsed);
	}

	
	delete bufi;
	delete buf;
	
	return (LRESULT) TRUE;
}