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/*
* Various utilities for command line tools
* copyright (c) 2003 Fabrice Bellard
*
* 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
*/

#ifndef FFMPEG_CMDUTILS_H
#define FFMPEG_CMDUTILS_H

#include <inttypes.h>
#include <FFmpegDecoder/libavcodec/avcodec.h>
#include <FFmpegDecoder/libavformat/avformat.h>
#include <FFmpegDecoder/libswscale/swscale.h>

/**
* program name, defined by the program for show_version().
*/
extern const char program_name[];

/**
* program birth year, defined by the program for show_banner()
*/
extern const int program_birth_year;

extern const int this_year;

extern const char **opt_names;
extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
extern AVFormatContext *avformat_opts;
extern struct SwsContext *sws_opts;

/**
* Fallback for options that are not explicitly handled, these will be
* parsed through AVOptions.
*/
int opt_default(const char *opt, const char *arg);

/**
* Parses a string and returns its corresponding value as a double.
* Exits from the application if the string cannot be correctly
* parsed or the corresponding value is invalid.
*
* @param context the context of the value to be set (e.g. the
* corresponding commandline option name)
* @param numstr the string to be parsed
* @param type the type (OPT_INT64 or OPT_FLOAT) as which the
* string should be parsed
* @param min the minimum valid accepted value
* @param max the maximum valid accepted value
*/
double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);

/**
* Parses a string specifying a time and returns its corresponding
* value as a number of microseconds. Exits from the application if
* the string cannot be correctly parsed.
*
* @param context the context of the value to be set (e.g. the
* corresponding commandline option name)
* @param timestr the string to be parsed
* @param is_duration a flag which tells how to interpret \p timestr, if
* not zero \p timestr is interpreted as a duration, otherwise as a
* date
*
* @see parse_date()
*/
int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);

typedef struct {
    const char *name;
    int flags;
#define HAS_ARG 0x0001
#define OPT_BOOL 0x0002
#define OPT_EXPERT 0x0004
#define OPT_STRING 0x0008
#define OPT_VIDEO 0x0010
#define OPT_AUDIO 0x0020
#define OPT_GRAB 0x0040
#define OPT_INT 0x0080
#define OPT_FLOAT 0x0100
#define OPT_SUBTITLE 0x0200
#define OPT_FUNC2 0x0400
#define OPT_INT64 0x0800
#define OPT_EXIT 0x1000
     union {
        void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
        int *int_arg;
        char **str_arg;
        float *float_arg;
        int (*func2_arg)(const char *, const char *);
        int64_t *int64_arg;
    } u;
    const char *help;
    const char *argname;
} OptionDef;

void show_help_options(const OptionDef *options, const char *msg, int mask, int value);

/**
* Parses the command line arguments.
* @param options Array with the definitions required to interpret every
* option of the form: -<option_name> [<argument>]
* @param parse_arg_function Name of the function called to process every
* argument without a leading option name flag. NULL if such arguments do
* not have to be processed.
*/
void parse_options(int argc, char **argv, const OptionDef *options,
                   void (* parse_arg_function)(const char*));

void set_context_opts(void *ctx, void *opts_ctx, int flags);

void print_error(const char *filename, int err);

/**
* Prints the program banner to stderr. The banner contents depend on the
* current version of the repository and of the libav* libraries used by
* the program.
*/
void show_banner(void);

/**
* Prints the version of the program to stdout. The version message
* depends on the current versions of the repository and of the libav*
* libraries.
*/
void show_version(void);

/**
* Prints the license of the program to stdout. The license depends on
* the license of the libraries compiled into the program.
*/
void show_license(void);

/**
* Prints a listing containing all the formats supported by the
* program.
*/
void show_formats(void);

/**
* Returns a positive value if reads from standard input a line
* starting with [yY], otherwise returns 0.
*/
int read_yesno(void);


#endif /* FFMPEG_CMDUTILS_H */
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