[FFmpeg-devel] [PATCH] lavfi/minterpolate: fix blending calc issue.

[mypopy at gmail.com]

On Fri, Jul 6, 2018 at 3:21 PM Steven Liu <lingjiujianke at gmail.com> wrote:
>
> mypopy at gmail.com <mypopy at gmail.com> 于2018年7月4日周三 下午3:05写道：
> >
> > On Wed, Jun 27, 2018 at 5:52 PM Jun Zhao <mypopydev at gmail.com> wrote:
> > >
> > > the right blending calc is:
> > > (alpha * Frame_2 + (MAX - alpha) * Frame_1 + 512) >> 10
> > >
> > > Signed-off-by: Jun Zhao <mypopydev at gmail.com>
> > > ---
> > >  libavfilter/vf_minterpolate.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/libavfilter/vf_minterpolate.c b/libavfilter/vf_minterpolate.c
> > > index d534315..c6a5e63 100644
> > > --- a/libavfilter/vf_minterpolate.c
> > > +++ b/libavfilter/vf_minterpolate.c
> > > @@ -1122,8 +1122,8 @@ static void interpolate(AVFilterLink *inlink,
> > AVFrame *avf_out)
> > >                  for (y = 0; y < height; y++) {
> > >                      for (x = 0; x < width; x++) {
> > >                          avf_out->data[plane][x + y * avf_out->linesize[plane]]
> > =
> > > -                                          alpha  * mi_ctx->frames[2].avf->data[plane][x
> > + y * mi_ctx->frames[2].avf->linesize[plane]] +
> > > -                            ((ALPHA_MAX - alpha) * mi_ctx->frames[1].avf->data[plane][x
> > + y * mi_ctx->frames[1].avf->linesize[plane]] + 512) >> 10;
> > > +                            (alpha  * mi_ctx->frames[2].avf->data[plane][x
> > + y * mi_ctx->frames[2].avf->linesize[plane]] +
> > > +                             (ALPHA_MAX - alpha) * mi_ctx->frames[1].avf->data[plane][x
> > + y * mi_ctx->frames[1].avf->linesize[plane]] + 512) >> 10;
> > >                      }
> > >                  }
> > >              }
> > > --
> > > 2.7.4
> > >
> > ping, any comments for this fix?
>
> LGTM
Applied, thanks
>