On Wed, May 25, 2022 at 05:53:12PM +0200, Michael Niedermayer wrote:
> On Tue, May 24, 2022 at 08:50:51PM +0200, Andreas Rheinhardt wrote:
> > Michael Niedermayer:
> > > Fixes: CID1435168
> > >
> > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> > > ---
> > > libavcodec/vc1_loopfilter.c | 5 +----
> > > 1 file changed, 1 insertion(+), 4 deletions(-)
> > >
> > > diff --git a/libavcodec/vc1_loopfilter.c b/libavcodec/vc1_loopfilter.c
> > > index 0f990cccef..ee694ede28 100644
> > > --- a/libavcodec/vc1_loopfilter.c
> > > +++ b/libavcodec/vc1_loopfilter.c
> > > @@ -1125,10 +1125,7 @@ static av_always_inline void
> > > vc1_b_h_intfi_loop_filter(VC1Context *v, uint8_t *d
> > > dst = dest + (block_num & 2) * 4 * s->linesize + (block_num & 1)
> > > * 8;
> > >
> > > if (!(flags & RIGHT_EDGE) || !(block_num & 5)) {
> > > - if (block_num > 3)
> > > - v->vc1dsp.vc1_h_loop_filter8(dst + 8, linesize, pq);
> > > - else
> > > - v->vc1dsp.vc1_h_loop_filter8(dst + 8, linesize, pq);
> > > + v->vc1dsp.vc1_h_loop_filter8(dst + 8, linesize, pq);
> > > }
> > >
> > > tt = ttblk[0] >> (block_num * 4) & 0xf;
> >
> > Are you certain that the current code is actually correct or whether
> > something else was intended?
>
> iam not certain no but the vc1_b_v_intfi_loop_filter() function also
> treats luma and chroma the same
>
> if(!(flags & BOTTOM_EDGE) || block_num < 2)
> v->vc1dsp.vc1_v_loop_filter8(dst + 8 * linesize, linesize, pq);
>
> this is just the matching function for horizontal instead of vertical
>
> also whan looking at the 4x4 4x8 and 8x4 cases i see no difference
> between horizontal and vertical for intfi. But ultimately yes of course
> it could be buggy and something else could be correct.
>
> but if i replace this by an abort()
> make: *** [fate-vc1_sa10143] Error 134
> make: *** [fate-vc1_ilaced_twomv] Error 134
>
> Fate fails, so it should be testedwill apply this unless someone has some further insight in this or objection as i just run into this again thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB In fact, the RIAA has been known to suggest that students drop out of college or go to community college in order to be able to afford settlements. -- The RIAA
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