Re: [FFmpeg-devel] [PATCH] avcodec/mpegvideo_enc: Fix 1 line and one column images

[Michael Niedermayer <michael@niedermayer.cc>]

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On Mon, Apr 08, 2024 at 08:00:58PM +0200, Andreas Rheinhardt wrote:
> Paul B Mahol:
> > On Mon, Apr 8, 2024 at 6:49 PM Michael Niedermayer <michael@niedermayer.cc>
> > wrote:
> > 
> >> Fixes: Ticket10952
> >> Fixes: poc21ffmpeg
> >> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> >> ---
> >>  libavcodec/mpegvideo_enc.c | 4 ++--
> >>  1 file changed, 2 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
> >> index d1b19178247..40844b2f682 100644
> >> --- a/libavcodec/mpegvideo_enc.c
> >> +++ b/libavcodec/mpegvideo_enc.c
> >> @@ -1199,8 +1199,8 @@ static int load_input_picture(MpegEncContext *s,
> >> const AVFrame *pic_arg)
> >>                  ptrdiff_t dst_stride = i ? s->uvlinesize : s->linesize;
> >>                  int h_shift = i ? s->chroma_x_shift : 0;
> >>                  int v_shift = i ? s->chroma_y_shift : 0;
> >> -                int w = s->width  >> h_shift;
> >> -                int h = s->height >> v_shift;
> >> +                int w = -((-s->width)  >> h_shift);
> >> +                int h = -((-s->height) >> v_shift);
> >>                  const uint8_t *src = pic_arg->data[i];
> >>                  uint8_t *dst = pic->f->data[i];
> >>                  int vpad = 16;
> >>
> > 
> > What that does? Its not same as aligned rshift macro?
> > 
> 
> It is the same, just more complicated. And maybe with more instructions.

will apply with "aligned rshift" macro

thx

[...]
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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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