smourier
commented
2 years ago Hi,
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Yes, not all guids are declared in DirectN. You get get all guid values from headers or from this online tool here: https://www.magnumdb.com
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Same for this: https://www.magnumdb.com/search?q=*AVEncCommonQuality
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This depends on how they are declared in the original header files. And actually, this is how it's declared in
Windows Kits\10\Include\10.0.22000.0\um\mfreadwrite.h:
enum __MIDL___MIDL_itf_mfreadwrite_0000_0001_0001
{
MF_SOURCE_READER_INVALID_STREAM_INDEX = 0xffffffff,
MF_SOURCE_READER_ALL_STREAMS = 0xfffffffe,
MF_SOURCE_READER_ANY_STREAM = 0xfffffffe,
MF_SOURCE_READER_FIRST_AUDIO_STREAM = 0xfffffffd,
MF_SOURCE_READER_FIRST_VIDEO_STREAM = 0xfffffffc,
MF_SOURCE_READER_MEDIASOURCE = 0xffffffff
} ;- The generator kinda guess where functions are defined, but there's unfortunately no magic here. In fact this one is not a function exported from a DLL, it's a native utility function implemented directly in the header, so I've updated Functions.cs to remove it. Here is its corresponding native code in
Windows Kits\10\Include\10.0.22000.0\um\mfapi.h, it can be easily adapted to C#:
MFGetAttributeRatio(
IMFAttributes* pAttributes,
REFGUID guidKey,
_Out_ UINT32* punNumerator,
_Out_ UINT32* punDenominator
)
{
return MFGetAttribute2UINT32asUINT64(pAttributes, guidKey, punNumerator, punDenominator);
}
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;
}
Unpack2UINT32AsUINT64(UINT64 unPacked, _Out_ UINT32* punHigh, _Out_ UINT32* punLow)
{
*punHigh = HI32(unPacked);
*punLow = LO32(unPacked);
}
HI32(UINT64 unPacked)
{
return (UINT32)(unPacked >> 32);
}
LO32(UINT64 unPacked)
{
return (UINT32)unPacked;
}
- This is not needed, in C#,
typeof(AnyType).Guidwill give you an interface guid.
Steph55
Thank you for your last correction! I was able to progress in my test of DirectN.
1) Now it seems that DMOs are missing, like this one, for instance:
CColorConvertDMO (CLSID_CColorConvertDMO)
2) Guids are missing like: CODECAPI_AVEncCommonQuality
3) This enum of DirectN is far from user friendly:
public enum __MIDL___MIDL_itf_mfreadwrite_0000_0001_0001 { MF_SOURCE_READER_INVALID_STREAM_INDEX = -1, MF_SOURCE_READER_ALL_STREAMS = -2, MF_SOURCE_READER_ANY_STREAM = -2, MF_SOURCE_READER_FIRST_AUDIO_STREAM = -3, MF_SOURCE_READER_FIRST_VIDEO_STREAM = -4, MF_SOURCE_READER_MEDIASOURCE = -1, }4) When I call the following function with valid parameters:
Functions.MFGetAttributeRatio(pType, MFConstants.MF_MT_FRAME_RATE_RANGE_MAX, out uint frameRateNum, out uint frameRateDem).ThrowOnError();I get the error:
System.EntryPointNotFoundException : 'Unable to find an entry point named 'MFGetAttributeRatio' in DLL 'mfplat'.'
5) Also, in order to replace the C++ function __uuidof, I wrote the following, because I did not find how in DirectN. You can include it, if needed:
public Guid __uuidof<T>() { var attribs = Attribute.GetCustomAttributes(typeof(T), typeof(GuidAttribute)); foreach (GuidAttribute attrib in attribs) { if (attrib.GetType() == typeof(GuidAttribute)) return new Guid(attrib.Value); } return new Guid(); }