COutputQueue::IsSpecialSample (Windows CE 5.0)
Determines if a sample is one of the special control samples (containing no data).
BOOL IsSpecialSample(IMediaSample* pSample);
Parameters
- pSample
Pointer to the sample to be passed to the connected input pin.
Return Values
Returns one of the following values.
| Value | Description |
|---|---|
| TRUE | pSample is a special control sample. |
| FALSE | pSample is an IMediaSample interface. |
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::ThreadProc member function detects these special samples on the queue by using IsSpecialSample and 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 COutputQueue in a derived class. Normal use of the COutputQueue class does not require the use of control samples.
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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