diff options
| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-09-16 21:48:16 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-09-18 23:42:38 +0300 |
| commit | 0fe1c50e505125cf2b026d810458bc5cbc242792 (patch) | |
| tree | 50569c6d05c686c15aca5415cda7587da77ce296 /libavfilter/vf_xbr.c | |
| parent | e47564828b9b351f874f24d66306294b7741b768 (diff) | |
all: do standards compliant absdiff computation
This resolves implementation defined behavior, and also silences -Wabsolute-value in clang 3.5+.
Moreover, the generated asm is identical to before modulo nop padding.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavfilter/vf_xbr.c')
| -rw-r--r-- | libavfilter/vf_xbr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/libavfilter/vf_xbr.c b/libavfilter/vf_xbr.c index 858660873c..c92e9a8230 100644 --- a/libavfilter/vf_xbr.c +++ b/libavfilter/vf_xbr.c @@ -65,13 +65,14 @@ static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y) #define YMASK 0xff0000 #define UMASK 0x00ff00 #define VMASK 0x0000ff +#define ABSDIFF(a,b) (abs((int)(a)-(int)(b))) uint32_t yuv1 = r2y[x & 0xffffff]; uint32_t yuv2 = r2y[y & 0xffffff]; - return (abs((yuv1 & YMASK) - (yuv2 & YMASK)) >> 16) + - (abs((yuv1 & UMASK) - (yuv2 & UMASK)) >> 8) + - abs((yuv1 & VMASK) - (yuv2 & VMASK)); + return (ABSDIFF(yuv1 & YMASK, yuv2 & YMASK) >> 16) + + (ABSDIFF(yuv1 & UMASK, yuv2 & UMASK) >> 8) + + ABSDIFF(yuv1 & VMASK, yuv2 & VMASK); } #define ALPHA_BLEND_128_W(a, b) ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1)) |