diff options
| author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-05-23 13:13:50 +0200 |
|---|---|---|
| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-05-25 12:42:19 +0200 |
| commit | 3c2c52baecb6c8c2af62989462804af7765694c4 (patch) | |
| tree | d8fa87db9c675efbf8150f5afec196f4a114effb /libavutil/eval.c | |
| parent | cf06e3e4dd8c1023fb1dcad905f3f77fdc1cf3fb (diff) | |
eval: implement not() expression
Diffstat (limited to 'libavutil/eval.c')
| -rw-r--r-- | libavutil/eval.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/libavutil/eval.c b/libavutil/eval.c index 9271fd6cbc..331221515e 100644 --- a/libavutil/eval.c +++ b/libavutil/eval.c @@ -125,7 +125,7 @@ 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_sqrt, e_not, } type; double value; // is sign in other types union { @@ -153,6 +153,7 @@ static double eval_expr(Parser *p, AVExpr *e) case e_ceil : return e->value * ceil (eval_expr(p, e->param[0])); case e_trunc: return e->value * trunc(eval_expr(p, e->param[0])); case e_sqrt: return e->value * sqrt (eval_expr(p, e->param[0])); + case e_not: return e->value * eval_expr(p, e->param[0]) == 0; case e_while: { double d = NAN; while (eval_expr(p, e->param[0])) @@ -288,6 +289,7 @@ static int parse_primary(AVExpr **e, Parser *p) else if (strmatch(next, "ceil" )) d->type = e_ceil; else if (strmatch(next, "trunc" )) d->type = e_trunc; else if (strmatch(next, "sqrt" )) d->type = e_sqrt; + else if (strmatch(next, "not" )) d->type = e_not; else { for (i=0; p->func1_names && p->func1_names[i]; i++) { if (strmatch(next, p->func1_names[i])) { @@ -456,6 +458,7 @@ static int verify_expr(AVExpr *e) case e_ceil: case e_trunc: case e_sqrt: + case e_not: return verify_expr(e->param[0]); default: return verify_expr(e->param[0]) && verify_expr(e->param[1]); } @@ -637,6 +640,9 @@ int main(void) "ceil(-123.123)", "sqrt(1764)", "sqrt(-1)", + "not(1)", + "not(NAN)", + "not(0)", NULL }; |