IAMBufferNegotiation::GetAllocatorProperties method (strmif.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetAllocatorProperties method retrieves the allocator properties that the pin is using.

Syntax

HRESULT GetAllocatorProperties(
  [out] ALLOCATOR_PROPERTIES *pprop
);

Parameters

[out] pprop

Pointer to an ALLOCATOR_PROPERTIES structure, allocated by the caller, that receives the allocator properties.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
S_OK	Success.
E_POINTER	NULL pointer argument.
VFW_E_NOT_CONNECTED	Pin is not connected.

Remarks

Call this method after the pins connect, to find out the allocator properties that were chosen.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib