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MFGetAttributeUINT64 function

Returns a UINT64 value from an attribute store, or a default value if the attribute is not present.

Syntax


UINT64 MFGetAttributeUINT64(
  _In_  IMFAttributes *pAttributes,
  _In_  REFGUID guidKey,
  _In_  UINT64 unDefault
);

Parameters

pAttributes [in]

Pointer to the IMFAttributes interface of the attribute store.

guidKey [in]

GUID that identifies which value to retrieve.

unDefault [in]

Default value to return if the attribute store does not contain the specified attribute.

Return value

Returns a UINT64 value.

Remarks

This helper function queries the attribute store for the UINT64 value specified by guidKey. If the value is not present, the function returns unDefault.

This function is convenient because it never returns a failure code. However, if the attribute in question does not have a meaningful default value, you should call IMFAttributes::GetUINT64 and check for MF_E_ATTRIBUTENOTFOUND.

Requirements

Minimum supported client

Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2008 [desktop apps | Windows Store apps]

Header

Mfapi.h

See also

IMFAttributes::GetUINT64
Media Foundation Functions
Attributes and Properties

 

 

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