CBaseInputPin::NotifyAllocator

  • 项目

Notifies the input pin as to which allocator the output pin is actually going to use.

HRESULT NotifyAllocator(
  IMemAllocator* pAllocator,
  BOOL bReadOnly
);

Parameters

  • pAllocator
    Pointer to the IMemAllocator object to use. This might or might not be the same IMemAllocator object that the input pin provided in the IMemInputPin::GetAllocator method (the output pin could provide its own allocator).
  • bReadOnly
    Flag to indicate if the samples from this allocator are read-only.

Return Values

Default implementation returns NOERROR.

Remarks

This member function implements the IMemInputPin::NotifyAllocator method, which is called by the connected output pin to inform the input pin of the chosen allocator for the memory transport. Override this member function if your filter cares about this information. By default, this sets the m_pAllocator data member to the allocator interface passed in after adding a reference count to that interface.

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

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