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avutil: add divide & modulo that round like unsigned ones do that is down.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Michael Niedermayer 2011-05-09 17:47:22 +02:00
parent 5deedf3552
commit 5192788321
1 changed files with 2 additions and 0 deletions
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2
libavutil/common.h
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@ -47,6 +47,8 @@
#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
/* assume b>0 */
#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
#define FFSIGN(a) ((a) > 0 ? 1 : -1)