CTransformFilter.InitializeOutputSample method

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 InitializeOutputSample method retrieves a new output sample and initializes it.

Syntax

HRESULT InitializeOutputSample(
   IMediaSample *pSample,
   IMediaSample **ppOutSample
);

Parameters

pSample

Pointer to the input sample's IMediaSample interface.

ppOutSample

Receives a pointer to the output sample's IMediaSample interface.

Return value

Returns S_OK or another HRESULT value.

Remarks

This method is called by the CTransformFilter::Receive method to prepare the output sample. Generally you do not have to call this method in your derived class, unless you override the Receive method.

This method retrieves a new sample from the output pin's allocator. Then it copies the sample properties from the input sample to the output sample. The sample properties are defined in the AM_SAMPLE2_PROPERTIES structure.

Requirements

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

See also

CTransformFilter Class