COutputQueue.IsSpecialSample method
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The IsSpecialSample method determines whether queued data is a control message.
Syntax
BOOL IsSpecialSample(
IMediaSample *pSample
);
Parameters
-
pSample
-
Pointer to an item in the queue.
Return value
Returns TRUE if pSample is a control message, or FALSE otherwise.
Remarks
The COutputQueue::QueueSample method can receive control messages in addition to media samples. A control message is a defined constant (cast to a LONG_PTR type) that instructs the thread to perform an action. Control messages do not contain media data. For more information, see COutputQueue::QueueSample.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|