https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-ifiltergraph2-addsourcefilterformoniker
IFilterGraph2::AddSourceFilterForMoniker (strmif.h) - Win32 apps | Microsoft Learn
The AddSourceFilterForMoniker method creates a source filter from an IMoniker pointer and adds the filter to the graph.
happsmicrosoftlearn