CTransformFilter::AlterQuality

  • 项目

Receives a quality-control notification and provides an opportunity to alter the media stream's quality.

virtual HRESULT AlterQuality(
  Quality q 
);

Parameters

  • q
    Quality-control notification message.

Return Values

Returns an HRESULT value. S_FALSE means to pass the message to the upstream filter (whether or not any action has been taken). An overriding member function can return NOERROR to indicate that the message has been handled completely (or as completely as possible) and no further action should be taken.

Remarks

This member function returns S_FALSE by default. It is called by the CTransformOutputPin::Notify member function before calling the CBaseInputPin::PassNotify member function to pass the quality control message upstream. If the filter is responsible for affecting the quality of the media stream, override this member function and respond to the quality-notification message.

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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