diff options
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 df4f265..4f250df 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]; } |
