CVideoTransformFilter::AlterQuality
| Microsoft DirectShow 9.0 |
CVideoTransformFilter::AlterQuality
The AlterQuality method notifies the filter that a quality change is requested. This method overrides the CTransformFilter::AlterQuality method.
Syntax
virtual HRESULT AlterQuality(
Quality q
);
Parameters
q
Quality structure that contains the quality control message.
Return Value
Returns E_FAIL.
Remarks
This method is called when the output pin receives a quality message (through the IQualityControl::Notify method).
The lateness value from q is stored in the m_itrLate member variable. The return value of E_FAIL indicates that the renderer should catch up by dropping frames, although the CVideoTransformFilter class will also drop frames under the right conditions.
Requirements
** Header:** Declared in Vtrans.h; include Streams.h.
** Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).
See Also