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avfilter/vf_eq: Fix clipping code

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Found-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-01-26 23:46:44 +01:00
parent 5a1e524ba7
commit 530bf8ece6
2 changed files with 2 additions and 2 deletions
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2
libavfilter/vf_eq.c
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@ -91,7 +91,7 @@ static void process_c(EQParameters *param, uint8_t *dst, int dst_stride,
for (x = 0; x < w; x++) { for (x = 0; x < w; x++) {
pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness; pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness;
if (pel & 768) if (pel & ~255)
pel = (-pel) >> 31; pel = (-pel) >> 31;
dst[y * dst_stride + x] = pel; dst[y * dst_stride + x] = pel;

2
libavfilter/x86/vf_eq.c
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@ -72,7 +72,7 @@ static void process_MMX(EQParameters *param, uint8_t *dst, int dst_stride,
for (i = w&7; i; i--) { for (i = w&7; i; i--) {
pel = ((*src++ * contrast) >> 12) + brightness; pel = ((*src++ * contrast) >> 12) + brightness;
if (pel & 768) if (pel & ~255)
pel = (-pel) >> 31; pel = (-pel) >> 31;
*dst++ = pel; *dst++ = pel;
} }