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Determines if the filter should start, continue, or stop skipping frames.
BOOL ShouldSkipFrame( IMediaSample * pIn );
Parameters
- pIn
- Received sample to be transformed or skipped.
Return Values
Returns TRUE if the filter should skip this sample; otherwise, returns FALSE.
Remarks
This member function sets the m_bSkippingmember variable to FALSE if the sample is a key frame (sync point) and returns FALSE. This stops any skipping that has started. This member function starts skipping samples (sets m_bSkippingto TRUE and returns TRUE) only if all of the following conditions are true.
- The average time to decode is more than one-fourth of the frame time.
- The filter is running at least one frame late.
- The next anticipated key frame is estimated to be no more than one frame early.
- The occurrence of key frames is sufficiently frequent.
This member function sends an EC_QUALITY_CHANGEnotification when sample skipping starts. Once skipping starts, all samples are skipped until the next key frame arrives.