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Code Issues Releases Activity

eval: add gcd()

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example: -vf 'scale=256:256,mp=geq=gcd(X\,Y)-2:128:128'

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-08 04:38:17 +02:00
parent 9e5e086b7e
commit 1339702540
1 changed files with 3 additions and 1 deletions
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4
libavutil/eval.c
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@ -126,7 +126,7 @@ struct AVExpr {
e_mod, e_max, e_min, e_eq, e_gt, e_gte,
e_pow, e_mul, e_div, e_add,
e_last, e_st, e_while, e_floor, e_ceil, e_trunc,
e_sqrt, e_not, e_random, e_hypot,
e_sqrt, e_not, e_random, e_hypot, e_gcd,
} type;
double value; // is sign in other types
union {
@ -174,6 +174,7 @@ static double eval_expr(Parser *p, AVExpr *e)
double d2 = eval_expr(p, e->param[1]);
switch (e->type) {
case e_mod: return e->value * (d - floor(d/d2)*d2);
case e_gcd: return e->value * av_gcd(d,d2);
case e_max: return e->value * (d > d2 ? d : d2);
case e_min: return e->value * (d < d2 ? d : d2);
case e_eq: return e->value * (d == d2 ? 1.0 : 0.0);
@ -304,6 +305,7 @@ static int parse_primary(AVExpr **e, Parser *p)
else if (strmatch(next, "pow" )) d->type = e_pow;
else if (strmatch(next, "random")) d->type = e_random;
else if (strmatch(next, "hypot" )) d->type = e_hypot;
else if (strmatch(next, "gcd" )) d->type = e_gcd;
else {
for (i=0; p->func1_names && p->func1_names[i]; i++) {
if (strmatch(next, p->func1_names[i])) {