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4/8/2010

Performs transform operations of the filter.

Syntax 

virtual HRESULT Transform(
  IMediaSample* 
pIn,
  IMediaSample* 
pOut
) PURE;

Parameters

pIn

Pointer to the input IMediaSampleinterface.

pOut

Pointer to the output IMediaSampleinterface.

Return Value

The overriding member function returns an HRESULTvalue. If it returns S_FALSE, the default implementation of the sample will not be delivered by the default implementation of the CTransformFilter::Receivemember function.

Remarks

The CTransformFilter::Receivemember function calls this member function, which must be overridden with a member function that implements the transform intended for the filter.

Perform your transform operation in the implementation of this member function, reading the data from the input IMediaSampleinterface and writing the data to the output IMediaSampleinterface.

The member function returns when the transform is complete, without releasing or delivering either of the samples.

Change properties on the output sample if they are not the same as the input sample. For example, change the start and stop time IMediaSample::SetTime), sample status flags ( IMediaSample::IsSyncPoint), and so on.

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment,
Version 2.12 requires DXPAK 1.0 or later