CBaseRenderer.GetSampleTimes 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetSampleTimes method retrieves the time stamps from a sample.
Syntax
virtual HRESULT GetSampleTimes(
IMediaSample *pMediaSample,
REFERENCE_TIME *pStartTime,
REFERENCE_TIME *pEndTime
);
Parameters
-
pMediaSample
-
Pointer to the sample's IMediaSample interface.
-
pStartTime
-
Pointer to a variable that receives the start time.
-
pEndTime
-
Pointer to a variable that receives the end time.
Return value
Returns an HRESULT value. Possible values include those 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. |
|
Bad time stamp: The end time is earlier than the start time. |
Remarks
The filter calls this method to determine how it should handle a sample. If the return value is S_OK, the filter renders the sample immediately. If the return value is S_FALSE, the filter schedules the sample for rendering, based on the time stamps. If the return value is an error code, the filter rejects the sample.
This method returns S_OK if the sample has no time stamps, or if the filter does not have a reference clock. Otherwise, it returns the value of the CBaseRenderer::ShouldDrawSampleNow method. In the base class, ShouldDrawSampleNow always returns S_FALSE. The derived class can override this behavior. For example, if the derived class implements quality control management, it might return E_FAIL to drop a sample.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|