1/*
2 * Various utilities for command line tools
3 * copyright (c) 2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef FFMPEG_CMDUTILS_H
23#define FFMPEG_CMDUTILS_H
24
25#include <inttypes.h>
26#include "libavcodec/avcodec.h"
27#include "libavformat/avformat.h"
28#include "libswscale/swscale.h"
29
30/**
31 * program name, defined by the program for show_version().
32 */
33extern const char program_name[];
34
35/**
36 * program birth year, defined by the program for show_banner()
37 */
38extern const int program_birth_year;
39
40extern const int this_year;
41
42extern const char **opt_names;
43extern AVCodecContext *avctx_opts[CODEC_TYPE_NB];
44extern AVFormatContext *avformat_opts;
45extern struct SwsContext *sws_opts;
46
47/**
48 * Fallback for options that are not explicitly handled, these will be
49 * parsed through AVOptions.
50 */
51int opt_default(const char *opt, const char *arg);
52
53/**
54 * Parses a string and returns its corresponding value as a double.
55 * Exits from the application if the string cannot be correctly
56 * parsed or the corresponding value is invalid.
57 *
58 * @param context the context of the value to be set (e.g. the
59 * corresponding commandline option name)
60 * @param numstr the string to be parsed
61 * @param type the type (OPT_INT64 or OPT_FLOAT) as which the
62 * string should be parsed
63 * @param min the minimum valid accepted value
64 * @param max the maximum valid accepted value
65 */
66double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
67
68/**
69 * Parses a string specifying a time and returns its corresponding
70 * value as a number of microseconds. Exits from the application if
71 * the string cannot be correctly parsed.
72 *
73 * @param context the context of the value to be set (e.g. the
74 * corresponding commandline option name)
75 * @param timestr the string to be parsed
76 * @param is_duration a flag which tells how to interpret \p timestr, if
77 * not zero \p timestr is interpreted as a duration, otherwise as a
78 * date
79 *
80 * @see parse_date()
81 */
82int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
83
84typedef struct {
85    const char *name;
86    int flags;
87#define HAS_ARG    0x0001
88#define OPT_BOOL   0x0002
89#define OPT_EXPERT 0x0004
90#define OPT_STRING 0x0008
91#define OPT_VIDEO  0x0010
92#define OPT_AUDIO  0x0020
93#define OPT_GRAB   0x0040
94#define OPT_INT    0x0080
95#define OPT_FLOAT  0x0100
96#define OPT_SUBTITLE 0x0200
97#define OPT_FUNC2  0x0400
98#define OPT_INT64  0x0800
99#define OPT_EXIT   0x1000
100     union {
101        void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
102        int *int_arg;
103        char **str_arg;
104        float *float_arg;
105        int (*func2_arg)(const char *, const char *);
106        int64_t *int64_arg;
107    } u;
108    const char *help;
109    const char *argname;
110} OptionDef;
111
112void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
113
114/**
115 * Parses the command line arguments.
116 * @param options Array with the definitions required to interpret every
117 * option of the form: -<option_name> [<argument>]
118 * @param parse_arg_function Name of the function called to process every
119 * argument without a leading option name flag. NULL if such arguments do
120 * not have to be processed.
121 */
122void parse_options(int argc, char **argv, const OptionDef *options,
123                   void (* parse_arg_function)(const char*));
124
125void set_context_opts(void *ctx, void *opts_ctx, int flags);
126
127void print_error(const char *filename, int err);
128
129/**
130 * Prints the program banner to stderr. The banner contents depend on the
131 * current version of the repository and of the libav* libraries used by
132 * the program.
133 */
134void show_banner(void);
135
136/**
137 * Prints the version of the program to stdout. The version message
138 * depends on the current versions of the repository and of the libav*
139 * libraries.
140 */
141void show_version(void);
142
143/**
144 * Prints the license of the program to stdout. The license depends on
145 * the license of the libraries compiled into the program.
146 */
147void show_license(void);
148
149/**
150 * Prints a listing containing all the formats supported by the
151 * program.
152 */
153void show_formats(void);
154
155#endif /* FFMPEG_CMDUTILS_H */
156