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Determines if a sample is one of the special control samples (containing no data).
BOOL IsSpecialSample(I MediaSample *pSample );
Parameters
- pSample
- Pointer to the sample to be passed to the connected input pin.
Return Values
Returns one of the following values.
TRUE pSampleis a special control sample. FALSE pSampleis an IMediaSampleinterface. Remarks
Special control samples are queued in line with the data by methods (such as COutputQueue::EOS) that require processing once all queued data has been delivered. The COutputQueue::ThreadProcmember function detects these special samples on the queue by using IsSpecialSampleand processes them appropriately.
A special sample is one of following types and contains no media data.
- EOS_PACKET
- NEW_SEGMENT
- RESET_PACKET
- SEND_PACKET
Special control samples are relevant only if you plan to change or extend the default base class implementation of COutputQueuein a derived class. Normal use of the COutputQueueclass does not require the use of control samples.