videocapture.cpp

Netmeeting是Windows系统自带的网上聊天软件

// VideoCapture.cpp: implementation of the CVideoCapture class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "NetMeeting.h"
#include "VideoCapture.h"

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

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
#include "NetMeetingDlg.h"
CVideoCapture::CVideoCapture(CWnd *pWnd)
{
	m_hWndCap = NULL;
	m_pVideoBuffer = NULL;
	m_pWnd = pWnd;
}

CVideoCapture::~CVideoCapture()
{

}
//////////////////////////////////////////////////////////////////////////
//			初始化设备
//////////////////////////////////////////////////////////////////////////
BOOL CVideoCapture::InitDevice()
{
	m_hWndCap = capCreateCaptureWindow("CaptureWindow",WS_POPUP,0,0,1,1,NULL,NULL);
	if (m_hWndCap == NULL)
	{
		AfxMessageBox("capCreateCaptureWindow error...");
		return FALSE;
	}
	capSetUserData(m_hWndCap,this);
	if(!capSetCallbackOnVideoStream(m_hWndCap,OnCaptureVideo))
	{
		AfxMessageBox("capSetCallbackOnVideoStream error...");
		return FALSE;
	}
	if (!capDriverConnect(m_hWndCap,0))
	{
		AfxMessageBox("capDriverConnect error...");
		return FALSE;
	}
	if (!SetCapturePara())
	{
		capDriverDisconnect(m_hWndCap);
		return FALSE;
	}
	return TRUE;
}
LRESULT CALLBACK CVideoCapture::OnCaptureVideo(HWND mwnd,LPVIDEOHDR lphdr)
{
	CVideoCapture *pVideoCapture = (CVideoCapture *)capGetUserData(mwnd);
	
	PBYTE pBuffer = new BYTE[lphdr->dwBytesUsed+1];
	memcpy(pBuffer,lphdr->lpData,lphdr->dwBytesUsed);

	((CNetMeetingDlg *)pVideoCapture->m_pWnd)->Display(
		pVideoCapture->m_stBMPInfo,pBuffer);


	((CNetMeetingDlg *)pVideoCapture->m_pWnd)->Display263Video(
		pVideoCapture->m_stBMPInfo,pBuffer,lphdr->dwBytesUsed);
	

	delete []pBuffer;
	pBuffer = NULL;

	return 0;
}

BOOL CVideoCapture::SetCapturePara()
{
	CAPTUREPARMS captureParam = {0};
	if(!capCaptureGetSetup(m_hWndCap,&captureParam,sizeof(captureParam)))
	{
		AfxMessageBox("capCaptureGetSetup error...");
		return FALSE;
	}
	captureParam.fAbortLeftMouse = FALSE;
	captureParam.fAbortRightMouse = FALSE;
	captureParam.fYield = TRUE;
	if (!capCaptureSetSetup(m_hWndCap,&captureParam,sizeof(captureParam)))
	{
		AfxMessageBox("capCaptureSetSetup error...");
		return FALSE;
	}
	if(capGetVideoFormat(m_hWndCap,&m_stBMPInfo,sizeof(BITMAPINFO)) == 0)
	{
		AfxMessageBox("capGetVideoFormat error...");
		return FALSE;
	}

	m_stBMPInfo.bmiHeader.biWidth = IMAGE_WIDTH;
	m_stBMPInfo.bmiHeader.biHeight = IMAGE_HEIGHT;
	if (!capSetVideoFormat(m_hWndCap,&m_stBMPInfo,sizeof(m_stBMPInfo)))
	{
		AfxMessageBox("capSetVideoFormat error...");
		return FALSE;
	}
	return TRUE;
}

void CVideoCapture::StartVideo()
{
	if(!capCaptureSequenceNoFile(m_hWndCap))
	{
		AfxMessageBox("capCaptureSequenceNoFile error...");
		return ;
	}
	capGetVideoFormat(m_hWndCap,&m_stBMPInfo,sizeof(BITMAPINFO));
}

void CVideoCapture::StopVideo()
{
	capSetCallbackOnVideoStream(m_hWndCap,NULL);
	capCaptureStop(m_hWndCap);
	capDriverDisconnect(m_hWndCap);
}