Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for
4/8/2010

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

Syntax 

virtual HRESULT AlterQuality(
  Quality 
q 
);

Parameters

q

Quality-control notification message.

Return Value

This member function returns E_FAIL by default.

Remarks

This member function overrides the CTransformFilter::AlterQualitymember function.

It is called by the CTransformOutputPin::Notifymember function before calling the CBaseInputPin::PassNotifymember function to pass the quality control message upstream.

This function sets the m_itrLatedata member to the value Qualitystructure's Latemember so the filter can determine whether to skip frames.

It returns E_FAIL so that the renderer downstream will continue to handle quality control.

Requirements

Windows Embedded CE Windows CE 2.12 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