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Optimize sign handling in get_symbol(). 

Originally committed as revision 18672 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-04-24 00:26:49 +00:00
parent a39b76ea7d
commit 3788e661f1
2 changed files with 4 additions and 8 deletions
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6
libavcodec/ffv1.c
View File

@ -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;
}
}

6
libavcodec/snow.c
View File

@ -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;
}
}