if( !bOneShot )return 0;
if (!pBuffer)return E_POINTER;
SaveBitmap(pBuffer, lBufferSize);
bOneShot = FALSE;
return 0;
}
//创建位图文件
BOOL SaveBitmap(BYTE * pBuffer, long lBufferSize )
{
HANDLE hf = CreateFile(
m_szFileName, GENERIC_WRITE, FILE_SHARE_READ, NULL,
CREATE_ALWAYS, NULL, NULL );
if( hf == INVALID_HANDLE_VALUE )return 0;
// 写文件头
BITMAPFILEHEADER bfh;
memset( &bfh, 0, sizeof( bfh ) );
bfh.bfType = ’MB’;
bfh.bfSize = sizeof( bfh ) lBufferSize sizeof( BITMAPINFOHEADER );
bfh.bfOffBits = sizeof( BITMAPINFOHEADER ) sizeof( BITMAPFILEHEADER );
DWORD dwWritten = 0;
WriteFile( hf, &bfh, sizeof( bfh ), &dwWritten, NULL );
// 写位图格式
BITMAPINFOHEADER bih;
memset( &bih, 0, sizeof( bih ) );
bih.biSize = sizeof( bih );
bih.biWidth = lWidth;
bih.biHeight = lHeight;
bih.biPlanes = 1;
bih.biBitCount = 24;
WriteFile( hf, &bih, sizeof( bih ), &dwWritten, NULL );
// 写位图数据
WriteFile( hf, pBuffer, lBufferSize, &dwWritten, NULL );
CloseHandle( hf );
return 0;
}
};
CSampleGrabberCB mCB;
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CCaptureVideo::CCaptureVideo()
{
//COM Library Intialization
if(FAILED(CoInitialize(NULL))) /*, COINIT_APARTMENTTHREADED)))*/
{
AfxMessageBox("CoInitialize Failed!\r\n");
return;
}
m_hWnd = NULL;
m_pVW = NULL;
m_pMC = NULL;
m_pGB = NULL;
m_pCapture = NULL;
}
CCaptureVideo::~CCaptureVideo()
{
// Stop media playback
if(m_pMC)m_pMC->Stop();
if(m_pVW){
m_pVW->put_Visible(OAFALSE);
m_pVW->put_Owner(NULL);
}
SAFE_RELEASE(m_pCapture);
SAFE_RELEASE(m_pMC);
SAFE_RELEASE(m_pGB);
SAFE_RELEASE(m_pBF);
CoUninitialize( );
}
int CCaptureVideo::EnumDevices(HWND hList)
{
if (!hList)
return -1;
int id = 0;
//枚举视频扑捉设备
ICreateDevEnum *pCreateDevEnum;
HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,IID_ICreateDevEnum, (void**)&pCreateDevEnum);
if (hr != NOERROR)return -1;
CComPtr<IEnumMoniker> pEm;
hr = pCreateDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory,&pEm, 0);
if (hr != NOERROR)return -1;
pEm->Reset();
ULONG cFetched;
IMoniker *pM;
while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK)
{
IPropertyBag *pBag;
hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
if(SUCCEEDED(hr))
{
VARIANT var;
var.vt = VT_BSTR;
hr = pBag->Read(L"FriendlyName", &var, NULL);
if (hr == NOERROR)
{
TCHAR str[2048];
id ;
WideCharToMultiByte(CP_ACP,0,var.bstrVal, -1, str, 2048, NULL, NULL);
::SendMessage(hList, CB_ADDSTRING, 0,(LPARAM)str);
SysFreeString(var.bstrVal);
}
pBag->Release();
}
pM->Release();
}
return id;
}
HRESULT CCaptureVideo::Init(int iDeviceID, HWND hWnd)
{
HRESULT hr;
hr = InitCaptureGraphBuilder();
if (FAILED(hr)){
AfxMessageBox("Failed to get video interfaces!");
return hr;
}
// Bind Device Filter. We know the device because the id was passed in
if(!BindFilter(iDeviceID, &m_pBF))return S_FALSE;
hr = m_pGB->AddFilter(m_pBF, L"Capture Filter");
// hr = m_pCapture->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video,
// m_pBF, NULL, NULL);
// create a sample grabber
hr = m_pGrabber.CoCreateInstance( CLSID_SampleGrabber );
if( !m_pGrabber ){
AfxMessageBox("Fail to create SampleGrabber, maybe qedit.dll is not registered?");
return hr;
}
CComQIPtr< IBaseFilter, &IID_IBaseFilter > pGrabBase( m_pGrabber );
//设置视频格式
AM_MEDIA_TYPE mt;
ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE));
mt.majortype = MEDIATYPE_Video;
mt.subtype = MEDIASUBTYPE_RGB24;
hr = m_pGrabber->SetMediaType(&mt);
if( FAILED( hr ) ){
AfxMessageBox("Fail to set media type!");
return hr;
}
hr = m_pGB->AddFilter( pGrabBase, L"Grabber" );
if( FAILED( hr ) ){
AfxMessageBox("Fail to put sample grabber in graph");
return hr;
}
// try to render preview/capture pin
hr = m_pCapture->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video,m_pBF,pGrabBase,NULL);
if( FAILED( hr ) )
hr = m_pCapture->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,m_pBF,pGrabBase,NULL);
if( FAILED( hr ) ){
AfxMessageBox("Can’t build the graph");
return hr;
}
hr = m_pGrabber->GetConnectedMediaType( &mt );
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