CBaseStreamControl::NotifyFilterState (Windows Embedded CE 6.0)
1/6/2010
Notifies the pin of your filter's state.
Syntax
void NotifyFilterState(
FILTER_STATE new_state,
REFERENCE_TIME tStart = 0
);
Parameters
- new_state
Filter's new state.
- tStart
Time at which streaming starts (only valid when new_state is in State_Running).
Return Value
None.
Remarks
This member function notifies the pin of a filter's new state by setting a FILTER_STATE enumeration type variable.
If you implement your own filter, inform your pin's CBaseStreamControl::NotifyFilterState member function what state your filter is in every time your filter changes state, as shown in the following example.
STDMETHODIMP CMyFilter::Run(REFERENCE_TIME tStart)
{
//once error check is successful
m_pMyPin->NotifyFilterState(State_Running, tStart);
//now continue with whatever should occur next, for example...
return CBaseFilter::Run(tStart);
}
STDMETHODIMP CMyFilter::Pause()
{
//Once error check is successful
m_pMyPin->NotifyFilterState(State_Paused, 0);
//Now continue with whatever should occur next, for example...
return CBaseFilter::Pause();
}
STDMETHODIMP CMyFilter::Stop()
{
//Once error check is successful
m_pMyPin->NotifyFilterState(State_Stopped, 0);
//Now continue with whatever should occur next, for example...
return CBaseFilter::Stop(tStart);
}
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |