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7542157d8a
Patch by Stefano Sabatini (stefano sabatini-lala poste it) Originally committed as revision 12647 to svn://svn.ffmpeg.org/ffmpeg/trunk
124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/*
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* Various utilities for command line tools
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* copyright (c) 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef FFMPEG_CMDUTILS_H
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#define FFMPEG_CMDUTILS_H
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#include <inttypes.h>
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/**
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* Parses a string and returns its corresponding value as a double.
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* Exits from the application if the string cannot be correctly
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* parsed or the corresponding value is invalid.
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*
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* @param context the context of the value to be set (e.g. the
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* corresponding commandline option name)
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* @param numstr the string to be parsed
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* @param type the type (OPT_INT64 or OPT_FLOAT) as which the
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* string should be parsed
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* @param min the minimum valid accepted value
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* @param max the maximum valid accepted value
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*/
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double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
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/**
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* Parses a string specifying a time and returns its corresponding
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* value as a number of microseconds. Exits from the application if
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* the string cannot be correctly parsed.
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*
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* @param context the context of the value to be set (e.g. the
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* corresponding commandline option name)
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* @param timestr the string to be parsed
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* @param is_duration a flag which tells how to interpret \p timestr, if
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* not zero \p timestr is interpreted as a duration, otherwise as a
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* date
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*
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* @see av_parse_date()
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*/
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int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
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typedef struct {
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const char *name;
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int flags;
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#define HAS_ARG 0x0001
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#define OPT_BOOL 0x0002
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#define OPT_EXPERT 0x0004
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#define OPT_STRING 0x0008
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#define OPT_VIDEO 0x0010
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#define OPT_AUDIO 0x0020
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#define OPT_GRAB 0x0040
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#define OPT_INT 0x0080
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#define OPT_FLOAT 0x0100
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#define OPT_SUBTITLE 0x0200
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#define OPT_FUNC2 0x0400
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#define OPT_INT64 0x0800
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union {
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void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
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int *int_arg;
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char **str_arg;
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float *float_arg;
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int (*func2_arg)(const char *, const char *);
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int64_t *int64_arg;
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} u;
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const char *help;
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const char *argname;
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} OptionDef;
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void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
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/**
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* Parses the command line arguments.
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* @param options Array with the definitions required to interpret every
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* option of the form: -<option_name> [<argument>]
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* @param parse_arg_function Name of the function called to process every
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* argument without a leading option name flag. NULL if such arguments do
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* not have to be processed.
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*/
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void parse_options(int argc, char **argv, const OptionDef *options,
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void (* parse_arg_function)(const char*));
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void print_error(const char *filename, int err);
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/**
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* Prints the program banner to stderr. The banner contents depend on the
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* current version of the repository and of the libav* libraries used by
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* the program.
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* @param program_name name of the program
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* @param program_birth_year year of birth of the program
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*/
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void show_banner(const char *program_name, int program_birth_year);
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/**
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* Prints the version of the program to stdout. The version message
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* depends on the current versions of the repository and of the libav*
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* libraries.
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* @param program_name name of the program
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*/
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void show_version(const char *program_name);
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/**
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* Prints the license of the program to stdout. The license depends on
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* the license of the libraries compiled into the program.
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*/
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void show_license(void);
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#endif /* FFMPEG_CMDUTILS_H */
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