private IWMWriterAdvanced GetWriterAdvanced(IBaseFilter asfWriter)
{
int hr;
IWMWriterAdvanced pWriterAdvanced = null;
// I don't understand why we can't just QueryInterface for a IWMWriterAdvanced, but
// we just can't. So, we use an IServiceProvider
DirectShowLib.IServiceProvider pProvider = asfWriter as DirectShowLib.IServiceProvider;
if (pProvider != null)
{
object opro;
hr = pProvider.QueryService(typeof(IWMWriterAdvanced2).GUID, typeof(IWMWriterAdvanced2).GUID, out opro);
WMError.ThrowExceptionForHR(hr);
pWriterAdvanced = opro as IWMWriterAdvanced;
if (pWriterAdvanced == null)
{
throw new Exception("Can't get IWMWriterAdvanced");
}
}
return(pWriterAdvanced);
}
private void HookupGraphEventService(IFilterGraph pGraph)
{
object o;
int hr;
DirectShowLib.IServiceProvider spServiceProvider = (DirectShowLib.IServiceProvider)pGraph;
hr = spServiceProvider.QueryService(typeof(BroadcastEventService).GUID,
typeof(IBroadcastEventEx).GUID,
out o);
spBroadcastEvent = o as IBroadcastEventEx;
if (hr < 0 || spBroadcastEvent == null)
{
// Create the Broadcast Event Service object.
spBroadcastEvent = new BroadcastEventService() as IBroadcastEventEx;
IRegisterServiceProvider spRegService = (IRegisterServiceProvider)pGraph;
// Register the Broadcast Event Service object as a service.
hr = spRegService.RegisterService(
typeof(BroadcastEventService).GUID,
spBroadcastEvent);
}
DsError.ThrowExceptionForHR(hr);
}
private void TestQuery()
{
int hr;
object o;
hr = m_isp.QueryService(typeof(foo2).GUID, typeof(IAMGraphBuilderCallback).GUID, out o);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(o == m_f);
}