CTransformFilter::Transform

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Performs transform operations of the filter.

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

Parameters

Return Values

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

Remarks

The CTransformFilter::Receive member 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 IMediaSample interface and writing the data to the output IMediaSample interface. 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

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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Last updated on Wednesday, April 13, 2005

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