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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]
Implements an allocator that supports the IMemAllocator interface.
This class derives from CBaseAllocator. For more information about allocators, refer to the documentation for CBaseAllocator.
| Protected Member Variables | Description |
|---|---|
| m_pBuffer | Pointer to the memory block that contains the buffers. |
| Protected Methods | Description |
| Free | Placeholder method; called during a decommit operation. |
| ReallyFree | Releases the memory for the buffers. |
| Alloc | Allocates memory for the buffers. |
| Public Methods | Description |
| CMemAllocator | Constructor method. |
| ~ CMemAllocator | Destructor method. |
| CreateInstance | Creates a new instance of the CMemAllocator class. |
| IMemAllocator Methods | Description |
| SetProperties | Specifies the number of buffers to allocate and the size of each buffer. |
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|