2 * Various utilities for command line tools
3 * copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef FFMPEG_CMDUTILS_H
23 #define FFMPEG_CMDUTILS_H
27 #include "libavcodec/avcodec.h"
28 #include "libavfilter/avfilter.h"
29 #include "libavformat/avformat.h"
30 #include "libswscale/swscale.h"
33 #undef main /* We don't want SDL to override our main() */
37 * program name, defined by the program for show_version().
39 extern const char program_name[];
42 * program birth year, defined by the program for show_banner()
44 extern const int program_birth_year;
46 extern const char **opt_names;
47 extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
48 extern AVFormatContext *avformat_opts;
49 extern struct SwsContext *sws_opts;
50 extern AVDictionary *format_opts, *video_opts, *audio_opts, *sub_opts;
53 * Initialize the cmdutils option system, in particular
54 * allocate the *_opts contexts.
58 * Uninitialize the cmdutils option system, in particular
59 * free the *_opts contexts and their contents.
61 void uninit_opts(void);
64 * Trivial log callback.
65 * Only suitable for show_help and similar since it lacks prefix handling.
67 void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
70 * Fallback for options that are not explicitly handled, these will be
71 * parsed through AVOptions.
73 int opt_default(const char *opt, const char *arg);
76 * Set the libav* libraries log level.
78 int opt_loglevel(const char *opt, const char *arg);
81 * Limit the execution time.
83 int opt_timelimit(const char *opt, const char *arg);
86 * Parse a string and return its corresponding value as a double.
87 * Exit from the application if the string cannot be correctly
88 * parsed or the corresponding value is invalid.
90 * @param context the context of the value to be set (e.g. the
91 * corresponding commandline option name)
92 * @param numstr the string to be parsed
93 * @param type the type (OPT_INT64 or OPT_FLOAT) as which the
94 * string should be parsed
95 * @param min the minimum valid accepted value
96 * @param max the maximum valid accepted value
98 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max);
101 * Parse a string specifying a time and return its corresponding
102 * value as a number of microseconds. Exit from the application if
103 * the string cannot be correctly parsed.
105 * @param context the context of the value to be set (e.g. the
106 * corresponding commandline option name)
107 * @param timestr the string to be parsed
108 * @param is_duration a flag which tells how to interpret timestr, if
109 * not zero timestr is interpreted as a duration, otherwise as a
114 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
119 #define HAS_ARG 0x0001
120 #define OPT_BOOL 0x0002
121 #define OPT_EXPERT 0x0004
122 #define OPT_STRING 0x0008
123 #define OPT_VIDEO 0x0010
124 #define OPT_AUDIO 0x0020
125 #define OPT_GRAB 0x0040
126 #define OPT_INT 0x0080
127 #define OPT_FLOAT 0x0100
128 #define OPT_SUBTITLE 0x0200
129 #define OPT_INT64 0x0400
130 #define OPT_EXIT 0x0800
131 #define OPT_DATA 0x1000
136 int (*func_arg)(const char *, const char *);
143 void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
146 * Parse the command line arguments.
147 * @param options Array with the definitions required to interpret every
148 * option of the form: -option_name [argument]
149 * @param parse_arg_function Name of the function called to process every
150 * argument without a leading option name flag. NULL if such arguments do
151 * not have to be processed.
153 void parse_options(int argc, char **argv, const OptionDef *options,
154 int (* parse_arg_function)(const char *opt, const char *arg));
156 void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec);
159 * Print an error message to stderr, indicating filename and a human
160 * readable description of the error code err.
162 * If strerror_r() is not available the use of this function in a
163 * multithreaded application may be unsafe.
167 void print_error(const char *filename, int err);
170 * Print the program banner to stderr. The banner contents depend on the
171 * current version of the repository and of the libav* libraries used by
174 void show_banner(void);
177 * Print the version of the program to stdout. The version message
178 * depends on the current versions of the repository and of the libav*
181 void show_version(void);
184 * Print the license of the program to stdout. The license depends on
185 * the license of the libraries compiled into the program.
187 void show_license(void);
190 * Print a listing containing all the formats supported by the
193 void show_formats(void);
196 * Print a listing containing all the codecs supported by the
199 void show_codecs(void);
202 * Print a listing containing all the filters supported by the
205 void show_filters(void);
208 * Print a listing containing all the bit stream filters supported by the
211 void show_bsfs(void);
214 * Print a listing containing all the protocols supported by the
217 void show_protocols(void);
220 * Print a listing containing all the pixel formats supported by the
223 void show_pix_fmts(void);
226 * Return a positive value if a line read from standard input
227 * starts with [yY], otherwise return 0.
229 int read_yesno(void);
232 * Read the file with name filename, and put its content in a newly
233 * allocated 0-terminated buffer.
235 * @param bufptr location where pointer to buffer is returned
236 * @param size location where size of buffer is returned
237 * @return 0 in case of success, a negative value corresponding to an
238 * AVERROR error code in case of failure.
240 int read_file(const char *filename, char **bufptr, size_t *size);
243 * Get a file corresponding to a preset file.
245 * If is_path is non-zero, look for the file in the path preset_name.
246 * Otherwise search for a file named arg.ffpreset in the directories
247 * $FFMPEG_DATADIR (if set), $HOME/.ffmpeg, and in the datadir defined
248 * at configuration time or in a "ffpresets" folder along the executable
249 * on win32, in that order. If no such file is found and
250 * codec_name is defined, then search for a file named
251 * codec_name-preset_name.ffpreset in the above-mentioned directories.
253 * @param filename buffer where the name of the found filename is written
254 * @param filename_size size in bytes of the filename buffer
255 * @param preset_name name of the preset to search
256 * @param is_path tell if preset_name is a filename path
257 * @param codec_name name of the codec for which to look for the
258 * preset, may be NULL
260 FILE *get_preset_file(char *filename, size_t filename_size,
261 const char *preset_name, int is_path, const char *codec_name);
264 enum PixelFormat pix_fmt;
267 extern AVFilter ffsink;
270 * Extract a frame from sink.
272 * @return a negative error in case of failure, 1 if one frame has
273 * been extracted successfully.
275 int get_filtered_video_frame(AVFilterContext *sink, AVFrame *frame,
276 AVFilterBufferRef **picref, AVRational *pts_tb);
278 #endif /* FFMPEG_CMDUTILS_H */