eval.h
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
26 #ifndef AVUTIL_EVAL_H
27 #define AVUTIL_EVAL_H
28 
29 #include "avutil.h"
30 
31 typedef struct AVExpr AVExpr;
32 
51 int av_expr_parse_and_eval(double *res, const char *s,
52  const char * const *const_names, const double *const_values,
53  const char * const *func1_names, double (* const *funcs1)(void *, double),
54  const char * const *func2_names, double (* const *funcs2)(void *, double, double),
55  void *opaque, int log_offset, void *log_ctx);
56 
74 int av_expr_parse(AVExpr **expr, const char *s,
75  const char * const *const_names,
76  const char * const *func1_names, double (* const *funcs1)(void *, double),
77  const char * const *func2_names, double (* const *funcs2)(void *, double, double),
78  int log_offset, void *log_ctx);
79 
87 double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
88 
92 void av_expr_free(AVExpr *e);
93 
111 double av_strtod(const char *numstr, char **tail);
112 
113 #endif /* AVUTIL_EVAL_H */
external API header
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:185
static double(*const funcs1[])(void *, double)
Definition: vf_lut.c:196
Definition: eval.c:119
static const double const_values[]
Definition: opt.c:105
static const char *const const_names[]
Definition: opt.c:112
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:465
int av_expr_parse_and_eval(double *res, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:524
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:515
double av_strtod(const char *numstr, char **tail)
Parse the string in numstr and return its value as a double.
Definition: eval.c:75