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| author | Clément Bœsch <clement@stupeflix.com> | 2015-02-18 11:17:10 +0100 |
|---|---|---|
| committer | Clément Bœsch <clement@stupeflix.com> | 2015-02-23 09:56:22 +0100 |
| commit | b0f5227558999df36d9980f23dbf811c980a13c4 (patch) | |
| tree | fce6d69922e2fd46972a727bd7d20698ad1e9bbf | |
| parent | 29bbc1be488ea4fc591d3e0ef12f0fc7c8812afb (diff) | |
avfilter/paletteuse: fix error dithering accuracy
| -rw-r--r-- | libavfilter/vf_paletteuse.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavfilter/vf_paletteuse.c b/libavfilter/vf_paletteuse.c index a8defc7582..87a90d0a35 100644 --- a/libavfilter/vf_paletteuse.c +++ b/libavfilter/vf_paletteuse.c @@ -133,9 +133,9 @@ static int query_formats(AVFilterContext *ctx) static av_always_inline int dither_color(uint32_t px, int er, int eg, int eb, int scale, int shift) { - return av_clip_uint8((px >> 16 & 0xff) + ((er * scale) >> shift)) << 16 - | av_clip_uint8((px >> 8 & 0xff) + ((eg * scale) >> shift)) << 8 - | av_clip_uint8((px & 0xff) + ((eb * scale) >> shift)); + return 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))); } static av_always_inline int diff(const uint8_t *c1, const uint8_t *c2) |