From 04826b7ff02f3ad2b7ffa4257587df64ee88882c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= Date: Thu, 7 Jan 2016 22:34:04 +0100 Subject: [PATCH] lavu/common: add an explanation to FF_CEIL_RSHIFT() --- libavutil/common.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavutil/common.h b/libavutil/common.h index bc6842edc0..9ac04daf95 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -54,7 +54,7 @@ #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)) -/* assume a>=0 and b>=0 */ +/* Fast a/(1<=0 and b>=0 */ #define FF_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \ : ((a) + (1<<(b)) - 1) >> (b)) #define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))