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CBaseInputPin.NotifyAllocator method

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The NotifyAllocator method specifies an allocator for the connection. This method implements the IMemInputPin::NotifyAllocator method.

Syntax

HRESULT NotifyAllocator(
   IMemAllocator *pAllocator,
   BOOL          bReadOnly
);

Parameters

pAllocator

Pointer to the allocator's IMemAllocator interface.

bReadOnly

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

Return value

Returns S_OK.

Remarks

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

Requirements

Requirement Value
Header
Amfilter.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CBaseInputPin Class