ADLINK Technology HDV62A, User Manual, Page: 76 / 110

64 DirectShow Programming Guide
FilterInfo.achName,// Caption for the dialog box
1,// Number of filters
(IUnknown **)&m_pFilter,// Pointer to the filter
caGUID.cElems,// Number of property pages
caGUID.pElems,// Pointer to property page CLSIDs
0,// Locale identifier
0,// Reserved
NULL// Reserved
);
CoTaskMemFree(caGUID.pElems);
}
3.2.2 COM interfaces
The IAMVideoProcAmp interface of the standard DirectShow
Interface provide acquisition or setting of incoming video signal
attributes, such as brightness, contrast, saturation, and others. For
other interfaces please refer to the DirectX SDK help.
// pFilter points to an ADLINK HDV62A A/V Video Capture
filter
IAMVideoProcAmp *pAmp;
HRESULT hr;
long contrast, flags;
hr = pFilter->QueryInterface(IID_IAMVideoProcAmp,
(void **)&pAmp);
if (SUCCEEDED(hr))
{
pAmp->Get(VideoProcAmp_Contrast, &contrast, &flags);
pAmp->Release();
}