diff options
| author | Martin Vignali <martin.vignali@gmail.com> | 2018-03-17 22:20:34 +0100 |
|---|---|---|
| committer | Martin Vignali <martin.vignali@gmail.com> | 2018-03-18 13:45:04 +0100 |
| commit | 3e7fa34d3b688b9b4b5b22344e8fc27c4b53286d (patch) | |
| tree | 31e953dc66a0c0895d68f98e9978947e9069a627 /libavfilter | |
| parent | b2bb1cb68be2627f4873ae1203197e1fca768650 (diff) | |
| download | ffmpeg-3e7fa34d3b688b9b4b5b22344e8fc27c4b53286d.tar.gz | |
avfilter/vf_premultiply : fix unpremultiply_offset for rgb input
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/vf_premultiply.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavfilter/vf_premultiply.c b/libavfilter/vf_premultiply.c index df4f26578d..4f250df3f4 100644 --- a/libavfilter/vf_premultiply.c +++ b/libavfilter/vf_premultiply.c @@ -272,7 +272,7 @@ static void unpremultiply8offset(const uint8_t *msrc, const uint8_t *asrc, for (y = 0; y < h; y++) { for (x = 0; x < w; x++) { if (asrc[x] > 0 && asrc[x] < 255) - dst[x] = FFMIN((msrc[x] - offset) * 255 / asrc[x] + offset, 255); + dst[x] = FFMIN(FFMAX(msrc[x] - offset, 0) * 255 / asrc[x] + offset, 255); else dst[x] = msrc[x]; } @@ -350,7 +350,7 @@ static void unpremultiply16offset(const uint8_t *mmsrc, const uint8_t *aasrc, for (y = 0; y < h; y++) { for (x = 0; x < w; x++) { if (asrc[x] > 0 && asrc[x] < max) - dst[x] = FFMAX(FFMIN((msrc[x] - offset) * (unsigned)max / asrc[x] + offset, max), 0); + dst[x] = FFMAX(FFMIN(FFMAX(msrc[x] - offset, 0) * (unsigned)max / asrc[x] + offset, max), 0); else dst[x] = msrc[x]; } |