cmdutils.h

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/*
 * 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 <stdint.h>

#include "libavcodec/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"

#ifdef __MINGW32__
#undef main /* We don't want SDL to override our main() */
#endif

extern const char program_name[];

extern const int program_birth_year;

extern const int this_year;

extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
extern AVFormatContext *avformat_opts;
extern struct SwsContext *sws_opts;
extern struct SwrContext *swr_opts;
extern AVDictionary *format_opts, *codec_opts;

void init_opts(void);
void uninit_opts(void);

void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);

int opt_default(const char *opt, const char *arg);

int opt_loglevel(const char *opt, const char *arg);

int opt_report(const char *opt);

int opt_max_alloc(const char *opt, const char *arg);

int opt_cpuflags(const char *opt, const char *arg);

int opt_codec_debug(const char *opt, const char *arg);

int opt_timelimit(const char *opt, const char *arg);

double parse_number_or_die(const char *context, const char *numstr, int type,
                           double min, double max);

int64_t parse_time_or_die(const char *context, const char *timestr,
                          int is_duration);

typedef struct SpecifierOpt {
    char *specifier;    
    union {
        uint8_t *str;
        int        i;
        int64_t  i64;
        float      f;
        double   dbl;
    } u;
} SpecifierOpt;

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_INT64  0x0400
#define OPT_EXIT   0x0800
#define OPT_DATA   0x1000
#define OPT_FUNC2  0x2000
#define OPT_OFFSET 0x4000       /* option is specified as an offset in a passed optctx */
#define OPT_SPEC   0x8000       /* option is to be stored in an array of SpecifierOpt.
                                   Implies OPT_OFFSET. Next element after the offset is
                                   an int containing element count in the array. */
#define OPT_TIME  0x10000
#define OPT_DOUBLE 0x20000
     union {
        void *dst_ptr;
        int (*func_arg)(const char *, const char *);
        int (*func2_arg)(void *, const char *, const char *);
        size_t off;
    } u;
    const char *help;
    const char *argname;
} OptionDef;

void show_help_options(const OptionDef *options, const char *msg, int mask,
                       int value);

void show_help_children(const AVClass *class, int flags);

void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
                   void (* parse_arg_function)(void *optctx, const char*));

int parse_option(void *optctx, const char *opt, const char *arg,
                 const OptionDef *options);

void parse_loglevel(int argc, char **argv, const OptionDef *options);

int locate_option(int argc, char **argv, const OptionDef *options,
                  const char *optname);

int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);

AVDictionary *filter_codec_opts(AVDictionary *opts, AVCodec *codec,
                                AVFormatContext *s, AVStream *st);

AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
                                           AVDictionary *codec_opts);

void print_error(const char *filename, int err);

void show_banner(int argc, char **argv, const OptionDef *options);

int opt_version(const char *opt, const char *arg);

int opt_license(const char *opt, const char *arg);

int opt_formats(const char *opt, const char *arg);

int opt_codecs(const char *opt, const char *arg);

int opt_filters(const char *opt, const char *arg);

int opt_bsfs(const char *opt, const char *arg);

int opt_protocols(const char *opt, const char *arg);

int opt_pix_fmts(const char *opt, const char *arg);

int show_sample_fmts(const char *opt, const char *arg);

int read_yesno(void);

int cmdutils_read_file(const char *filename, char **bufptr, size_t *size);

FILE *get_preset_file(char *filename, size_t filename_size,
                      const char *preset_name, int is_path, const char *codec_name);

void exit_program(int ret);

void *grow_array(void *array, int elem_size, int *size, int new_size);

#endif /* CMDUTILS_H */

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