CBaseStreamControl::NotifyFilterState (Windows CE 5.0)
Notifies the pin of your filter's state.
void NotifyFilterState(FILTER_STATEnew_state,REFERENCE_TIMEtStart= 0 );
Parameters
- new_state
Filter's new state. - tStart
Time at which streaming starts (only valid when new_state is in State_Running).
Return Values
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
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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