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avfilter/vf_paletteuse: Fix left shift outside of range of int 

by keeping the variable uint32_t which in this situation is the natural
type anyway. This affected the FATE-test filter-paletteuse-sierra2_4a.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-01-22 01:47:21 +01:00 committed by Andreas Rheinhardt
parent 55b46902c1
commit 797c2ecc8f
1 changed files with 3 additions and 2 deletions
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5
libavfilter/vf_paletteuse.c
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@ -152,9 +152,10 @@ static int query_formats(AVFilterContext *ctx)
return 0;
}
static av_always_inline int dither_color(uint32_t px, int er, int eg, int eb, int scale, int shift)
static av_always_inline uint32_t dither_color(uint32_t px, int er, int eg,
int eb, int scale, int shift)
{
return av_clip_uint8( px >> 24 ) << 24
return px >> 24 << 24
| av_clip_uint8((px >> 16 & 0xff) + ((er * scale) / (1<<shift))) << 16
| av_clip_uint8((px >> 8 & 0xff) + ((eg * scale) / (1<<shift))) << 8
| av_clip_uint8((px & 0xff) + ((eb * scale) / (1<<shift)));