CBaseRenderer.ShouldDrawSampleNow 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 ShouldDrawSampleNow method determines how a sample is scheduled for rendering.
Syntax
virtual HRESULT ShouldDrawSampleNow(
IMediaSample *pMediaSample,
REFERENCE_TIME *pStartTime,
REFERENCE_TIME *pEndTime
);
Parameters
-
pMediaSample
-
Pointer to the sample's IMediaSample interface.
-
pStartTime
-
Pointer to a variable that contains the sample's start time.
-
pEndTime
-
Pointer to a variable that contains the sample's end time.
Return value
Returns S_FALSE. If the derived class overrides this method, return one of the values shown in the following table.
| Return code | Description |
|---|---|
|
The sample should be rendered immediately. |
|
The sample should be scheduled for rendering, based on the time stamps. |
|
Do not render this sample. |
Remarks
The CBaseRenderer::GetSampleTimes method calls this method. By default, samples are always scheduled for rendering based on their time stamps. The derived class can override this method; for example, to implement quality control.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|