| /* |
| * 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 "libavutil/libm.h" |
| #include "libavutil/timer.h" |
| #include "libavutil/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 |
| }; |
| int ret; |
| |
| for (expr = exprs; *expr; expr++) { |
| printf("Evaluating '%s'\n", *expr); |
| ret = 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); |
| if (ret < 0) |
| printf("av_expr_parse_and_eval failed\n"); |
| } |
| |
| ret = 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); |
| if (ret < 0) |
| printf("av_expr_parse_and_eval failed\n"); |
| ret = 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 (ret < 0) |
| printf("av_expr_parse_and_eval failed\n"); |
| |
| if (argc > 1 && !strcmp(argv[1], "-t")) { |
| for (i = 0; i < 1050; i++) { |
| START_TIMER; |
| ret = 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); |
| if (ret < 0) |
| printf("av_expr_parse_and_eval failed\n"); |
| STOP_TIMER("av_expr_parse_and_eval"); |
| } |
| } |
| |
| return 0; |
| } |