aboutsummaryrefslogtreecommitdiffstats
path: root/cmdutils.h
blob: 981f0faf1eb9788ae02df6189f22f5902abf2f03 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/*
 * 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>

/**
 * 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;

/**
 * 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 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);

#endif /* FFMPEG_CMDUTILS_H */