Partager via

CBaseAllocator::Alloc

  • Article

Allocates a media sample object.

HRESULT Alloc(void);

Parameters

None.

Return Values

Returns an HRESULT value.

Remarks

Override this member function to allocate memory, instantiate CMediaSample objects, and add them to the free list represented by the m_lFree data member. The CMemAllocator::Alloc member function is an example of an override of this member function. It calls this member function first to ensure that allocator properties have been set.

This member function is called from the CBaseAllocator::Commit member function when entering the active state. The default implementation returns an error value if the IMemAllocator::SetProperties method has not been called yet, and checks that there are no outstanding buffers.

Requirements

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header:

Last updated on Wednesday, April 13, 2005

© 2005 Microsoft Corporation. All rights reserved.