[PATCH] xaudio2: Don't return XAudio28 interface for XAudio2[0..7] objects in QueryInterface()

[Roger Zoellner]

Sure :)

Am Fr., 12. Okt. 2018 um 19:52 Uhr schrieb Andrew Eikum <
aeikum at codeweavers.com>:

> Thanks, Roger. Could you add a test for this? I think it could go
> right after the CoCreateInstance in <dlls/xaudio2_7/tests/xaudio2.c>.
>
> Andrew
>
> On Fri, Oct 12, 2018 at 07:36:48PM +0200, Roger Zoellner wrote:
> > Fixes bug
> > https://bugs.winehq.org/show_bug.cgi?id=43660
> > (DOS2 classic client is affected as well)
> >
> > In this specific case, the bug is caused by a call to QueryInterface
> inside bink2w64.dll, which then
> > will treat a precreated XAudio27 object as XAudio28. This leads to a
> crash.
> >
> > This fix may affect other games, that use BINK2, too.
> >
> > Signed-off-by: Roger Zoellner <zoellner.roger at gmail.com>
> > ---
> >  dlls/xaudio2_7/xaudio_dll.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/dlls/xaudio2_7/xaudio_dll.c b/dlls/xaudio2_7/xaudio_dll.c
> > index 28cf98565b..461ac56ffe 100644
> > --- a/dlls/xaudio2_7/xaudio_dll.c
> > +++ b/dlls/xaudio2_7/xaudio_dll.c
> > @@ -1262,7 +1262,9 @@ static HRESULT WINAPI
> IXAudio2Impl_QueryInterface(IXAudio2 *iface, REFIID riid,
> >      TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppvObject);
> >
> >      if(IsEqualGUID(riid, &IID_IUnknown) ||
> > +#if XAUDIO2_VER == 8
> >              IsEqualGUID(riid, &IID_IXAudio28) ||
> > +#endif
> >              IsEqualGUID(riid, &IID_IXAudio2))
> >          *ppvObject = &This->IXAudio2_iface;
> >      else if(IsEqualGUID(riid, &IID_IXAudio27)){
> > --
> > 2.19.0
> >
> >
> >
>
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