Get new buffer during frame decoding in VB video decoder, not only once
[libav.git] / cmdutils.h
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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
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22#ifndef FFMPEG_CMDUTILS_H
23#define FFMPEG_CMDUTILS_H
01310af2 24
f0a838e5 25#include <inttypes.h>
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26#include "libavcodec/avcodec.h"
27#include "libavformat/avformat.h"
28#include "libswscale/swscale.h"
f0a838e5 29
60b5a745 30/**
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31 * program name, defined by the program for show_version().
32 */
33extern const char program_name[];
34
35/**
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36 * program birth year, defined by the program for show_banner()
37 */
38extern const int program_birth_year;
39
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40extern const int this_year;
41
85663ef3 42extern const char **opt_names;
636f1c4c 43extern AVCodecContext *avcodec_opts[CODEC_TYPE_NB];
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44extern AVFormatContext *avformat_opts;
45extern struct SwsContext *sws_opts;
46
47/**
b7438896 48 * Fallback for options that are not explicitly handled, these will be
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49 * parsed through AVOptions.
50 */
51int opt_default(const char *opt, const char *arg);
52
ea9c581f 53/**
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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.
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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
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63 * @param min the minimum valid accepted value
64 * @param max the maximum valid accepted value
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65 */
66double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
67
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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 *
748061de 80 * @see parse_date()
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81 */
82int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
83
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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
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91#define OPT_VIDEO 0x0010
92#define OPT_AUDIO 0x0020
93#define OPT_GRAB 0x0040
26d4f26b 94#define OPT_INT 0x0080
394c4d77 95#define OPT_FLOAT 0x0100
ae27975d 96#define OPT_SUBTITLE 0x0200
8bbf6db9 97#define OPT_FUNC2 0x0400
ffdf9a1f 98#define OPT_INT64 0x0800
a0b3bcd9 99#define OPT_EXIT 0x1000
ae27975d 100 union {
8bbf6db9 101 void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
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102 int *int_arg;
103 char **str_arg;
1f631450 104 float *float_arg;
8bbf6db9 105 int (*func2_arg)(const char *, const char *);
ffdf9a1f 106 int64_t *int64_arg;
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107 } u;
108 const char *help;
109 const char *argname;
110} OptionDef;
111
02d504a7 112void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
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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
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125void set_context_opts(void *ctx, void *opts_ctx, int flags);
126
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127void print_error(const char *filename, int err);
128
f35917b2 129/**
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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.
86074ed1 133 */
ea9c581f 134void show_banner(void);
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135
136/**
15067504 137 * Prints the version of the program to stdout. The version message
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138 * depends on the current versions of the repository and of the libav*
139 * libraries.
86074ed1 140 */
64555bd9 141void show_version(void);
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142
143/**
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144 * Prints the license of the program to stdout. The license depends on
145 * the license of the libraries compiled into the program.
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146 */
147void show_license(void);
148
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149/**
150 * Prints a listing containing all the formats supported by the
151 * program.
152 */
153void show_formats(void);
154
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155/**
156 * Returns a positive value if reads from standard input a line
157 * starting with [yY], otherwise returns 0.
158 */
159int read_yesno(void);
160
5b21bdab 161#endif /* FFMPEG_CMDUTILS_H */