IAMDevMemoryAllocator::Alloc method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
Syntax
HRESULT Alloc(
[out] BYTE **ppBuffer,
[in, out] DWORD *pdwcbBuffer
);
Parameters
[out] ppBuffer
Pointer that will receive the address of the allocated memory buffer.
[in, out] pdwcbBuffer
Pointer to a DWORD whose input value is the number of bytes to allocate and whose output value is the actual number of bytes allocated.
Return value
Returns S_OK if the desired quantity of memory was allocated, S_FALSE if memory was unavailable.
Remarks
Call this method to allocate a block of memory from the available pool.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |