Some Media Foundation helper functions are not mapped

[EzeKees]

Hello. First, thanks again for this great library, I am using it extensively in my project. Something I noticed or didn't find is that some media foundation helper functions were not mapped, for example:

MFGetAttributeSize
MFSetAttributeSize

This is so? In case they are not, is there any interest in mapping them? Thank you

[smourier]

Hi,

These are not DLL exports but C inline utility/wrapper functions, actually defined as this in mfapi.h:

inline
HRESULT
MFGetAttributeSize(
    IMFAttributes*  pAttributes,
    REFGUID         guidKey,
    _Out_ UINT32*   punWidth,
    _Out_ UINT32*   punHeight
    )
{
    return MFGetAttribute2UINT32asUINT64(pAttributes, guidKey, punWidth, punHeight);
}

inline
HRESULT
MFGetAttribute2UINT32asUINT64(
    IMFAttributes*  pAttributes,
    REFGUID         guidKey,
    _Out_ UINT32*   punHigh32,
    _Out_ UINT32*   punLow32
    )
{
    UINT64 unPacked;
    HRESULT hr = S_OK;

    hr = pAttributes->GetUINT64(guidKey, &unPacked);
    if (FAILED(hr)) {
        return hr;
    }
    Unpack2UINT32AsUINT64(unPacked, punHigh32, punLow32);

    return hr;
}

inline
void
Unpack2UINT32AsUINT64(UINT64 unPacked, _Out_ UINT32* punHigh, _Out_ UINT32* punLow)
{
    *punHigh = HI32(unPacked);
    *punLow = LO32(unPacked);
}

So they cannot be used from C# at all. However, with the extensions functions, you can easily do the same, for example:

IComObject<IMFAttributes> atts = get from somewhere...

var MF_MT_FRAME_SIZE = new Guid("1652c33d-d6b2-4012-b834-72030849a37d"); // https://www.magnumdb.com/search?q=MF_MT_FRAME_SIZE

var size = atts.GetUInt64(MF_MT_FRAME_SIZE);
var width = (uint)(size >> 32);
var height = (uint)(size & 0xFFFFFFFF);

[EzeKees]

I'll write the functions manually then. Thank you so much!!