cmdutils.h

/*
 * 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