Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
An AVStream minidriver's AVStrMiniAllocate routine allocates a frame using the allocator specified in the Context parameter.
Syntax
PFNKSDEFAULTALLOCATE Pfnksdefaultallocate;
PVOID Pfnksdefaultallocate(
[in] PVOID Context
)
{...}
Parameters
[in] Context
Pointer to the allocator's context structure created in AVStrMiniInitializeAllocator.
Return value
Allocate returns a pointer to the newly allocated memory. Return NULL if the attempt to allocate memory failed.
Remarks
The minidriver specifies this routine's address in the Allocate member of its KSALLOCATOR_DISPATCH structure. The minidriver passes this structure to the class driver in KSPIN_DISPATCH.
AVStream calls this routine to allocate a frame. The handler should allocate a frame as described by the allocator framing context passed into the initialization dispatch.
For more information, see KS Allocators.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Microsoft Windows XP and later operating systems and DirectX 8.0 and later DirectX versions. |
| Target Platform | Desktop |
| Header | ks.h (include Ks.h) |