Move opt_loglevel() from ffmpeg.c to cmdutils.c.
[libav.git] / cmdutils.h
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 */
33 extern const char program_name[];
34
35 /**
36 * program birth year, defined by the program for show_banner()
37 */
38 extern const int program_birth_year;
39
40 extern const int this_year;
41
42 extern const char **opt_names;
43 extern AVCodecContext *avcodec_opts[CODEC_TYPE_NB];
44 extern AVFormatContext *avformat_opts;
45 extern struct SwsContext *sws_opts;
46
47 /**
48 * Fallback for options that are not explicitly handled, these will be
49 * parsed through AVOptions.
50 */
51 int opt_default(const char *opt, const char *arg);
52
53 /**
54 * Sets the libav* libraries log level.
55 */
56 int opt_loglevel(const char *opt, const char *arg);
57
58 /**
59 * Parses a string and returns its corresponding value as a double.
60 * Exits from the application if the string cannot be correctly
61 * parsed or the corresponding value is invalid.
62 *
63 * @param context the context of the value to be set (e.g. the
64 * corresponding commandline option name)
65 * @param numstr the string to be parsed
66 * @param type the type (OPT_INT64 or OPT_FLOAT) as which the
67 * string should be parsed
68 * @param min the minimum valid accepted value
69 * @param max the maximum valid accepted value
70 */
71 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
72
73 /**
74 * Parses a string specifying a time and returns its corresponding
75 * value as a number of microseconds. Exits from the application if
76 * the string cannot be correctly parsed.
77 *
78 * @param context the context of the value to be set (e.g. the
79 * corresponding commandline option name)
80 * @param timestr the string to be parsed
81 * @param is_duration a flag which tells how to interpret timestr, if
82 * not zero timestr is interpreted as a duration, otherwise as a
83 * date
84 *
85 * @see parse_date()
86 */
87 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
88
89 typedef struct {
90 const char *name;
91 int flags;
92 #define HAS_ARG 0x0001
93 #define OPT_BOOL 0x0002
94 #define OPT_EXPERT 0x0004
95 #define OPT_STRING 0x0008
96 #define OPT_VIDEO 0x0010
97 #define OPT_AUDIO 0x0020
98 #define OPT_GRAB 0x0040
99 #define OPT_INT 0x0080
100 #define OPT_FLOAT 0x0100
101 #define OPT_SUBTITLE 0x0200
102 #define OPT_FUNC2 0x0400
103 #define OPT_INT64 0x0800
104 #define OPT_EXIT 0x1000
105 union {
106 void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
107 int *int_arg;
108 char **str_arg;
109 float *float_arg;
110 int (*func2_arg)(const char *, const char *);
111 int64_t *int64_arg;
112 } u;
113 const char *help;
114 const char *argname;
115 } OptionDef;
116
117 void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
118
119 /**
120 * Parses the command line arguments.
121 * @param options Array with the definitions required to interpret every
122 * option of the form: -<option_name> [<argument>]
123 * @param parse_arg_function Name of the function called to process every
124 * argument without a leading option name flag. NULL if such arguments do
125 * not have to be processed.
126 */
127 void parse_options(int argc, char **argv, const OptionDef *options,
128 void (* parse_arg_function)(const char*));
129
130 void set_context_opts(void *ctx, void *opts_ctx, int flags);
131
132 void print_error(const char *filename, int err);
133
134 /**
135 * Prints the program banner to stderr. The banner contents depend on the
136 * current version of the repository and of the libav* libraries used by
137 * the program.
138 */
139 void show_banner(void);
140
141 /**
142 * Prints the version of the program to stdout. The version message
143 * depends on the current versions of the repository and of the libav*
144 * libraries.
145 */
146 void show_version(void);
147
148 /**
149 * Prints the license of the program to stdout. The license depends on
150 * the license of the libraries compiled into the program.
151 */
152 void show_license(void);
153
154 /**
155 * Prints a listing containing all the formats supported by the
156 * program.
157 */
158 void show_formats(void);
159
160 /**
161 * Returns a positive value if reads from standard input a line
162 * starting with [yY], otherwise returns 0.
163 */
164 int read_yesno(void);
165
166 #endif /* FFMPEG_CMDUTILS_H */