fftools_cmdutils.h

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/*
 * Various utilities for command line tools
 * copyright (c) 2003 Fabrice Bellard
 * copyright (c) 2018-2022 Taner Sener
 * copyright (c) 2023 ARTHENICA LTD
 *
 * 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
 */
 
/*
 * This file is the modified version of cmdutils.h file living in ffmpeg source code under the fftools folder. We
 * manually update it each time we depend on a new ffmpeg version. Below you can see the list of changes applied
 * by us to develop mobile-ffmpeg and later ffmpeg-kit libraries.
 *
 * ffmpeg-kit changes by ARTHENICA LTD
 *
 * 07.2023
 * --------------------------------------------------------
 * - FFmpeg 6.0 changes migrated
 *
 * mobile-ffmpeg / ffmpeg-kit changes by Taner Sener
 *
 * 09.2022
 * --------------------------------------------------------
 * - config.h include added back
 *
 * 01.2020
 * --------------------------------------------------------
 * - ffprobe support added (variables used by ffprobe marked with "__thread" specifier)
 * - AV_LOG_STDERR log level added
 *
 * 12.2019
 * --------------------------------------------------------
 * - concurrent execution support ("__thread" specifier added to variables used by multiple threads)
 *
 * 03.2019
 * --------------------------------------------------------
 * - config.h include removed
 *
 * 08.2018
 * --------------------------------------------------------
 * - fftools_ prefix added to file name and include guards
 *
 * 07.2018
 * --------------------------------------------------------
 * - include guards renamed
 * - unused headers removed
 */
 
#ifndef FFTOOLS_CMDUTILS_H
#define FFTOOLS_CMDUTILS_H
 
#include <stdint.h>
 
#include "config.h"
#include "libavcodec/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
 
#ifdef _WIN32
#undef main /* We don't want SDL to override our main() */
#endif
 
#define AV_LOG_STDERR    -16
 
extern __thread char *program_name;
 
extern __thread int program_birth_year;
 
extern __thread AVDictionary *sws_dict;
extern __thread AVDictionary *swr_opts;
extern __thread AVDictionary *format_opts, *codec_opts;
extern __thread int hide_banner;
extern __thread int find_stream_info;
 
void register_exit(void (*cb)(int ret));
 
void report_and_exit(int ret) av_noreturn;
 
void exit_program(int ret) av_noreturn;
 
void init_dynload(void);
 
void uninit_opts(void);
 
void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
 
int opt_default(void *optctx, const char *opt, const char *arg);
 
int opt_timelimit(void *optctx, 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;
        uint64_t ui64;
        float      f;
        double   dbl;
    } u;
} SpecifierOpt;
 
typedef struct OptionDef {
    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_INT    0x0080
#define OPT_FLOAT  0x0100
#define OPT_SUBTITLE 0x0200
#define OPT_INT64  0x0400
#define OPT_EXIT   0x0800
#define OPT_DATA   0x1000
#define OPT_PERFILE  0x2000     /* the option is per-file (currently ffmpeg-only).
                                   implied by OPT_OFFSET or OPT_SPEC */
#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
#define OPT_INPUT  0x40000
#define OPT_OUTPUT 0x80000
     union {
        void *dst_ptr;
        int (*func_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 req_flags,
                       int rej_flags, int alt_flags);
 
void show_help_children(const AVClass *clazz, int flags);
 
void show_help_default_ffmpeg(const char *opt, const char *arg);
void show_help_default_ffprobe(const char *opt, const char *arg);
 
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);
 
typedef struct Option {
    const OptionDef  *opt;
    const char       *key;
    const char       *val;
} Option;
 
typedef struct OptionGroupDef {
    const char *name;
    const char *sep;
    int flags;
} OptionGroupDef;
 
typedef struct OptionGroup {
    const OptionGroupDef *group_def;
    const char *arg;
 
    Option *opts;
    int  nb_opts;
 
    AVDictionary *codec_opts;
    AVDictionary *format_opts;
    AVDictionary *sws_dict;
    AVDictionary *swr_opts;
} OptionGroup;
 
typedef struct OptionGroupList {
    const OptionGroupDef *group_def;
 
    OptionGroup *groups;
    int       nb_groups;
} OptionGroupList;
 
typedef struct OptionParseContext {
    OptionGroup global_opts;
 
    OptionGroupList *groups;
    int           nb_groups;
 
    /* parsing state */
    OptionGroup cur_group;
} OptionParseContext;
 
int parse_optgroup(void *optctx, OptionGroup *g);
 
int split_commandline(OptionParseContext *octx, int argc, char *argv[],
                      const OptionDef *options,
                      const OptionGroupDef *groups, int nb_groups);
 
void uninit_parse_context(OptionParseContext *octx);
 
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, enum AVCodecID codec_id,
                                AVFormatContext *s, AVStream *st, const AVCodec *codec);
 
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 read_yesno(void);
 
FILE *get_preset_file(char *filename, size_t filename_size,
                      const char *preset_name, int is_path, const char *codec_name);
 
void *grow_array(void *array, int elem_size, int *size, int new_size);
 
void *allocate_array_elem(void *array, size_t elem_size, int *nb_elems);
 
#define GROW_ARRAY(array, nb_elems)\
    array = grow_array(array, sizeof(*array), &nb_elems, nb_elems + 1)
 
#define ALLOC_ARRAY_ELEM(array, nb_elems)\
    allocate_array_elem(&array, sizeof(*array[0]), &nb_elems)
 
#define GET_PIX_FMT_NAME(pix_fmt)\
    const char *name = av_get_pix_fmt_name(pix_fmt);
 
#define GET_CODEC_NAME(id)\
    const char *name = avcodec_descriptor_get(id)->name;
 
#define GET_SAMPLE_FMT_NAME(sample_fmt)\
    const char *name = av_get_sample_fmt_name(sample_fmt)
 
#define GET_SAMPLE_RATE_NAME(rate)\
    char name[16];\
    snprintf(name, sizeof(name), "%d", rate);
 
double get_rotation(int32_t *displaymatrix);
 
#endif /* FFTOOLS_CMDUTILS_H */