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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "timer.h"
#include "eval.h"
static const double const_values[] = {
M_PI,
M_E,
0
};
static const char *const const_names[] = {
"PI",
"E",
0
};
int main(int argc, char **argv)
{
int i;
double d;
const char *const *expr;
static const char *const exprs[] = {
"",
"1;2",
"-20",
"-PI",
"+PI",
"1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)",
"80G/80Gi",
"1k",
"1Gi",
"1gi",
"1GiFoo",
"1k+1k",
"1Gi*3foo",
"foo",
"foo(",
"foo()",
"foo)",
"sin",
"sin(",
"sin()",
"sin)",
"sin 10",
"sin(1,2,3)",
"sin(1 )",
"1",
"1foo",
"bar + PI + E + 100f*2 + foo",
"13k + 12f - foo(1, 2)",
"1gi",
"1Gi",
"st(0, 123)",
"st(1, 123); ld(1)",
"lte(0, 1)",
"lte(1, 1)",
"lte(1, 0)",
"lt(0, 1)",
"lt(1, 1)",
"gt(1, 0)",
"gt(2, 7)",
"gte(122, 122)",
/* compute 1+2+...+N */
"st(0, 1); while(lte(ld(0), 100), st(1, ld(1)+ld(0));st(0, ld(0)+1)); ld(1)",
/* compute Fib(N) */
"st(1, 1); st(2, 2); st(0, 1); while(lte(ld(0),10), st(3, ld(1)+ld(2)); st(1, ld(2)); st(2, ld(3)); st(0, ld(0)+1)); ld(3)",
"while(0, 10)",
"st(0, 1); while(lte(ld(0),100), st(1, ld(1)+ld(0)); st(0, ld(0)+1))",
"isnan(1)",
"isnan(NAN)",
"isnan(INF)",
"isinf(1)",
"isinf(NAN)",
"isinf(INF)",
"floor(NAN)",
"floor(123.123)",
"floor(-123.123)",
"trunc(123.123)",
"trunc(-123.123)",
"ceil(123.123)",
"ceil(-123.123)",
"sqrt(1764)",
"isnan(sqrt(-1))",
"not(1)",
"not(NAN)",
"not(0)",
"6.0206dB",
"-3.0103dB",
"pow(0,1.23)",
"pow(PI,1.23)",
"PI^1.23",
"pow(-1,1.23)",
"if(1, 2)",
"if(1, 1, 2)",
"if(0, 1, 2)",
"ifnot(0, 23)",
"ifnot(1, NaN) + if(0, 1)",
"ifnot(1, 1, 2)",
"ifnot(0, 1, 2)",
"taylor(1, 1)",
"taylor(eq(mod(ld(1),4),1)-eq(mod(ld(1),4),3), PI/2, 1)",
"root(sin(ld(0))-1, 2)",
"root(sin(ld(0))+6+sin(ld(0)/12)-log(ld(0)), 100)",
"7000000B*random(0)",
"squish(2)",
"gauss(0.1)",
"hypot(4,3)",
"gcd(30,55)*print(min(9,1))",
"bitor(42, 12)",
"bitand(42, 12)",
"bitand(NAN, 1)",
"between(10, -3, 10)",
"between(-4, -2, -1)",
"between(1,2)",
"clip(0, 2, 1)",
"clip(0/0, 1, 2)",
"clip(0, 0/0, 1)",
NULL
};
for (expr = exprs; *expr; expr++) {
printf("Evaluating '%s'\n", *expr);
av_expr_parse_and_eval(&d, *expr,
const_names, const_values,
NULL, NULL, NULL, NULL, NULL, 0, NULL);
if (isnan(d))
printf("'%s' -> nan\n\n", *expr);
else
printf("'%s' -> %f\n\n", *expr, d);
}
av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)",
const_names, const_values,
NULL, NULL, NULL, NULL, NULL, 0, NULL);
printf("%f == 12.7\n", d);
av_expr_parse_and_eval(&d, "80G/80Gi",
const_names, const_values,
NULL, NULL, NULL, NULL, NULL, 0, NULL);
printf("%f == 0.931322575\n", d);
if (argc > 1 && !strcmp(argv[1], "-t")) {
for (i = 0; i < 1050; i++) {
START_TIMER;
av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)",
const_names, const_values,
NULL, NULL, NULL, NULL, NULL, 0, NULL);
STOP_TIMER("av_expr_parse_and_eval");
}
}
return 0;
}
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