CBaseRenderer::CheckReady (Compact 2013)
3/26/2014
Determines if the renderer is ready to process the next sample.
Syntax
BOOL CheckReady(void);
Parameters
None.
Return Value
Returns TRUE if the m_evComplete event is currently set, but does not block.
Remarks
This member function calls the CAMEvent::Check member function.
This is mainly used in transitioning to paused states.
When a renderer is paused, it should not complete the state change until it receives data. So although the call to IMediaFilter::Pause completes immediately, if the application calls IMediaFilter::GetState it returns VFW_S_STATE_INTERMEDIATE.
When a sample arrives at the renderer, the event that is initially reset during the pause call is signaled. At this point, an application calling IMediaFilter::GetState returns NOERROR.
This process allows an application to pause a filter graph and wait until data is queued and ready to be rendered.
Requirements
Header |
dshow.h, |
Library |
ole32.lib, |