Re: [PATCH 2/6] quartz: Add support for filtermapper3 to filtergraph

[Alexandre Julliard]

Maarten Lankhorst  writes:
> @@ -269,6 +269,9 @@ static HRESULT WINAPI FilterGraphInner_QueryInterface(IUnknown * iface,
>      } else if (IsEqualGUID(&IID_IFilterMapper2, riid)) {
>          *ppvObj = This->pFilterMapper2;
>          TRACE("   returning IFilterMapper2 interface from aggregated filtermapper (%p)\n", *ppvObj);
> - } else if (IsEqualGUID(&IID_IFilterMapper3, riid)) {
> -
>    *ppvObj = This->pFilterMapper2;
> -
>    TRACE("   returning IFilterMapper3 interface from aggregated filtermapper (%p)\n", *ppvObj);

You have to query that interface first.