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avutil/eval: change sqrt to hypot 

This improves the mathematical behavior of hypotenuse computation.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
This commit is contained in:
Ganesh Ajjanagadde 2015-11-14 12:04:53 -05:00
parent 275aca8fba
commit 401c93ddb7
1 changed files with 1 additions and 1 deletions
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2
libavutil/eval.c
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@ -299,7 +299,7 @@ static double eval_expr(Parser *p, AVExpr *e)
case e_add: return e->value * (d + d2); case e_add: return e->value * (d + d2);
case e_last:return e->value * d2; case e_last:return e->value * d2;
case e_st : return e->value * (p->var[av_clip(d, 0, VARS-1)]= d2); case e_st : return e->value * (p->var[av_clip(d, 0, VARS-1)]= d2);
case e_hypot:return e->value * (sqrt(d*d + d2*d2)); case e_hypot:return e->value * hypot(d, d2);
case e_bitand: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d & (long int)d2); case e_bitand: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d & (long int)d2);
case e_bitor: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d | (long int)d2); case e_bitor: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d | (long int)d2);
} }