[FFmpeg-devel] [PATCH] avfilter/vf_nlmeans: round values toward nearest integer

[Clément Bœsch]

On Sun, Oct 20, 2019 at 09:54:16PM +0200, Paul B Mahol wrote:
> Instead of rounding toward zero and thus producing
> darker output.
> 
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  libavfilter/vf_nlmeans.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavfilter/vf_nlmeans.c b/libavfilter/vf_nlmeans.c
> index dcb5a03953..06233b0dd4 100644
> --- a/libavfilter/vf_nlmeans.c
> +++ b/libavfilter/vf_nlmeans.c
> @@ -419,7 +419,7 @@ static void weight_averages(uint8_t *dst, ptrdiff_t dst_linesize,
>              // Also weight the centered pixel
>              wa[x].total_weight += 1.f;
>              wa[x].sum += 1.f * src[x];
> -            dst[x] = av_clip_uint8(wa[x].sum / wa[x].total_weight);
> +            dst[x] = av_clip_uint8(wa[x].sum / wa[x].total_weight + 0.5f);
>          }
>          dst += dst_linesize;
>          src += src_linesize;

LGTM

-- 
Clément B.