[FFmpeg-devel] [PATCH v2 01/15] avfilter/vf_xbr: Fix left shift of negative number

[Paul B Mahol]

lgtm

On 9/28/19, Andreas Rheinhardt <andreas.rheinhardt at gmail.com> wrote:
> Affected every usage of vf_xbr, e.g. the FATE-tests filter-2xbr,
> filter-3xbr, filter-4xbr.
>
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> ---
>  libavfilter/vf_xbr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavfilter/vf_xbr.c b/libavfilter/vf_xbr.c
> index 2c71871d22..87810c88f1 100644
> --- a/libavfilter/vf_xbr.c
> +++ b/libavfilter/vf_xbr.c
> @@ -395,7 +395,7 @@ static int init(AVFilterContext *ctx)
>              int startg = FFMAX3(-bg, -rg, 0);
>              int endg = FFMIN3(255-bg, 255-rg, 255);
>              uint32_t y = (uint32_t)(( 299*rg + 1000*startg + 114*bg)/1000);
> -            c = bg + (rg<<16) + 0x010101 * startg;
> +            c = bg + rg * (1 << 16) + 0x010101 * startg;
>              for (g = startg; g <= endg; g++) {
>                  s->rgbtoyuv[c] = ((y++) << 16) + (u << 8) + v;
>                  c+= 0x010101;
> --
> 2.20.1
>
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