From f4b6bf8ace68f90bcd890aade3f374fd1c4b2377 Mon Sep 17 00:00:00 2001 From: michael Date: Fri, 24 Apr 2009 00:26:49 +0000 Subject: [PATCH] Optimize sign handling in get_symbol(). git-svn-id: file:///var/local/repositories/ffmpeg/trunk@18672 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b --- libavcodec/ffv1.c | 6 ++---- libavcodec/snow.c | 6 ++---- 2 files changed, 4 insertions(+), 8 deletions(-) diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c index 9eef531d5..62b12ede1 100644 --- a/libavcodec/ffv1.c +++ b/libavcodec/ffv1.c @@ -258,10 +258,8 @@ static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ a += a + get_rac(c, state+22 + i); //22..31 } - if(is_signed && get_rac(c, state+11 + e)) //11..21 - return -a; - else - return a; + e= -(is_signed && get_rac(c, state+11 + e)); //11..21 + return (a^e)-e; } } diff --git a/libavcodec/snow.c b/libavcodec/snow.c index 5d9577bc0..995c1a202 100644 --- a/libavcodec/snow.c +++ b/libavcodec/snow.c @@ -665,10 +665,8 @@ static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31 } - if(is_signed && get_rac(c, state+11 + FFMIN(e,10))) //11..21 - return -a; - else - return a; + e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21 + return (a^e)-e; } } -- 2.39.2