[FFmpeg-devel] [PATCH] H264 DXVA2 implementation

[Reimar Döffinger]

On Sun, Jan 10, 2010 at 01:21:47PM +0000, M?ns Rullg?rd wrote:
> Ramiro Polla <ramiro.polla at gmail.com> writes:
> 
> > On Sat, Jan 9, 2010 at 9:46 PM, Laurent Aimar <fenrir at videolan.org> wrote:
> >> New patch (v5) attached.
> >
> > j-b pointed me to the vlc buildbot where this doesn't compile under
> > "-std=c99" (which is set by default in FFmpeg). I'm no C guru and I'm
> > quite tired right now, but it seems you can't use anonymous unions in
> > your dxva2api.h, such as:
> >
> > typedef struct {
> >     union {
> >         struct {
> >             UCHAR Index7Bits     : 7;
> >             UCHAR AssociatedFlag : 1;
> >         };
> >         UCHAR bPicEntry;
> >     };
> > } DXVA_PicEntry_H264;
> 
> WTF?  How would you even begin to access those fields?

It's a Microsoft/GNU extension.
DXVA_PicEntry_H264.Index7Bits
accesses right into the union/struct