CBaseInputPin::GetAllocator (Windows Embedded CE 6.0)
1/6/2010
Retrieves the allocator interface that this input pin identifies as the interface for the output pin to use.
Syntax
HRESULT GetAllocator(
IMemAllocator** ppAllocator
);
Parameters
- ppAllocator
Pointer to an obtained IMemAllocator object.
Return Value
Default implementation returns either E_OUTOFMEMORY, if an allocator cannot be created, or NOERROR upon success.
Remarks
This member function implements the IMemInputPin::GetAllocator method, which is called by the connected output pin to retrieve an allocator to use for transporting media samples.
By default, this member function creates a CMemAllocator object and obtains the IMemAllocator interface, to which it adds a reference count for the pin when assigning it to the m_pAllocator data member, and adds another reference count before passing it back to the output pin.
Override this member function if your filter has another allocator, such as one from a downstream pin, or a specialized allocator to offer the connected output pin.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |