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IMemInputPin::NotifyAllocator

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Microsoft DirectShow 9.0

IMemInputPin::NotifyAllocator

The NotifyAllocator method specifies an allocator for the connection.

Syntax

  HRESULT NotifyAllocator(
  IMemAllocator *pAllocator,
  BOOL bReadOnly
);

Parameters

pAllocator

[in] Pointer to the allocator's IMemAllocator interface.

bReadOnly

[out] Flag that specifies whether samples from this allocator are read-only. If TRUE, samples are read-only.

Return Values

Returns S_OK if successful, or an HRESULT value indicating the cause of the error.

Remarks

During the pin connection, the output pin chooses an allocator and calls this method to notify the input pin. The output pin might use the allocator that the input pin proposed in the IMemInputPin::GetAllocator method, or it might provide its own allocator.

If the bReadOnly parameter is TRUE, all samples in the allocator are read-only. The filter must copy them to modify the data.

Requirements

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also