libavcodec/eval.h

   1 /*
   2  * simple arithmetic expression evaluator
   3  *
   4  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file eval.h
  25  * eval header.
  26  */
  27
  28 #ifndef AVCODEC_EVAL_H
  29 #define AVCODEC_EVAL_H
  30
  31 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
  32 double ff_eval(char *s, double *const_value, const char **const_name,
  33                double (**func1)(void *, double), const char **func1_name,
  34                double (**func2)(void *, double, double), char **func2_name,
  35                void *opaque);
  36 #endif
  37 double ff_eval2(char *s, double *const_value, const char **const_name,
  38                double (**func1)(void *, double), const char **func1_name,
  39                double (**func2)(void *, double, double), char **func2_name,
  40                void *opaque, char **error);
  41
  42 typedef struct ff_expr_s AVEvalExpr;
  43 AVEvalExpr * ff_parse(char *s, const char **const_name,
  44                double (**func1)(void *, double), const char **func1_name,
  45                double (**func2)(void *, double, double), char **func2_name,
  46                char **error);
  47 double ff_parse_eval(AVEvalExpr * e, double *const_value, void *opaque);
  48 void ff_eval_free(AVEvalExpr * e);
  49
  50 #endif /* AVCODEC_EVAL_H */