avicap.cpp

一个用VC写的停车场管理系统 带视频监控程控

// AviCap.cpp : implementation file
//

#include "stdafx.h"
#include "ParkSys.h"
#include "AviCap.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// AviCap

CAviCap::CAviCap()
{
}

CAviCap::~CAviCap()
{
}

BOOL CAviCap::capInit(CWnd* pParentWnd, int tx, int ty,
					  int bx, int by, int avi_WindowID,
					  int DeviceIndex)
{
		m_hWndCap = capCreateCaptureWindow((LPSTR)"Capture Window",
					WS_CHILD|WS_VISIBLE,
					tx,ty,bx,by, 
					 pParentWnd->GetSafeHwnd(), avi_WindowID);

	capDriverConnect(m_hWndCap, DeviceIndex);
	capOverlay (m_hWndCap, TRUE);

	if (m_hWndCap == NULL)
		return FALSE;

	//设置错误处理函数
	capSetCallbackOnError(m_hWndCap, CAviCap::ErrorCallbackProc);
	return TRUE;
}
void CAviCap::capClose()
{
	capOverlay(m_hWndCap, 0);
	capDriverDisconnect(m_hWndCap);

}

/////////////////////////////////////////////////////////////////////////////
// AviCap message handlers
// ErrorCallbackProc: error callback function 
// hWnd:              capture window handle 
// nErrID:            error code for the encountered error 
// lpErrorText:       error text string for the encountered error 
// 

LRESULT CAviCap::ErrorCallbackProc(HWND hWnd, int nErrID, LPSTR lpErrorText)
{
	if (!hWnd) 
        return FALSE; 
	
    if (nErrID == 0)            // Starting a new major function. 
        return TRUE;            // Clear out old errors. 
	
    // Show the error identifier and text. 
	CString strMsg;
	strMsg.Format("%s。错误号：%d", lpErrorText, nErrID);
	
    AfxMessageBox(strMsg, MB_OK | MB_ICONEXCLAMATION); 
	
    return (LRESULT) TRUE; 
}