/* * 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> #include "libavcodec/avcodec.h" #include "libavformat/avformat.h" #include "libswscale/swscale.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; extern const int this_year; extern const char **opt_names; extern AVCodecContext *avcodec_opts[CODEC_TYPE_NB]; extern AVFormatContext *avformat_opts; extern struct SwsContext *sws_opts; /** * Fallback for options that are not explicitly handled, these will be * parsed through AVOptions. */ int opt_default(const char *opt, const char *arg); /** * 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 set_context_opts(void *ctx, void *opts_ctx, int flags); 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); /** * Returns a positive value if reads from standard input a line * starting with [yY], otherwise returns 0. */ int read_yesno(void); #endif /* FFMPEG_CMDUTILS_H */