IMemAllocatorCallbackTemp::GetFreeCount method (strmif.h)

Artículo
10/13/2021
Tiempo de lectura: 2 minutos

The GetFreeCount method returns the number of free media samples. This number equals the total number of media samples minus the number of samples that are currently held by filters.

Syntax

HRESULT GetFreeCount(
  [out] LONG *plBuffersFree
);

Parameters

[out] plBuffersFree

Pointer to a variable that receives the number of free media samples.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
E_POINTER	NULL pointer argument
S_OK	Success

Remarks

A filter holds a sample by keeping a reference count on it. It releases the sample by releasing the reference count.

Until the allocator is committed, the samples are not guaranteed to be allocated.

Requirements


Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib