diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2009-04-24 00:26:49 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2009-04-24 00:26:49 +0000 |
| commit | 3788e661f1e50558b92544c8e2d373aa553e9124 (patch) | |
| tree | e7e52d96ad5b5749004957c05d02748ece039e5f | |
| parent | a39b76ea7d98c63b83584ff761977cf41b61b314 (diff) | |
| download | ffmpeg-3788e661f1e50558b92544c8e2d373aa553e9124.tar.gz | |
Optimize sign handling in get_symbol().
Originally committed as revision 18672 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/ffv1.c | 6 | ||||
| -rw-r--r-- | libavcodec/snow.c | 6 |
2 files changed, 4 insertions, 8 deletions
diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c index 9eef531d59..62b12ede16 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 5d9577bc03..995c1a2024 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; } } |