ffprobe.c

    { "of", OPT_STRING | HAS_ARG, {(void*)&print_format}, "alias for -print_format", "format" },
    { "select_streams", OPT_STRING | HAS_ARG, {(void*)&stream_specifier}, "select the specified streams", "stream_specifier" },
    { "sections", OPT_EXIT, {.func_arg = opt_sections}, "print sections structure and section information, and exit" },
    { "show_data",    OPT_BOOL, {(void*)&do_show_data}, "show packets data" },
    { "show_data_hash", OPT_STRING | HAS_ARG, {(void*)&show_data_hash}, "show packets data hash" },
    { "show_error",   0, {(void*)&opt_show_error},  "show probing error" },
    { "show_format",  0, {(void*)&opt_show_format}, "show format/container info" },
    { "show_frames",  0, {(void*)&opt_show_frames}, "show frames info" },
    { "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
      "show a particular entry from the format/container info", "entry" },
    { "show_entries", HAS_ARG, {.func_arg = opt_show_entries},
      "show a set of specified entries", "entry_list" },
    { "show_packets", 0, {(void*)&opt_show_packets}, "show packets info" },
    { "show_programs", 0, {(void*)&opt_show_programs}, "show programs info" },
    { "show_streams", 0, {(void*)&opt_show_streams}, "show streams info" },
    { "show_chapters", 0, {(void*)&opt_show_chapters}, "show chapters info" },
    { "count_frames", OPT_BOOL, {(void*)&do_count_frames}, "count the number of frames per stream" },
    { "count_packets", OPT_BOOL, {(void*)&do_count_packets}, "count the number of packets per stream" },
    { "show_program_version",  0, {(void*)&opt_show_program_version},  "show ffprobe version" },
    { "show_library_versions", 0, {(void*)&opt_show_library_versions}, "show library versions" },
    { "show_versions",         0, {(void*)&opt_show_versions}, "show program and library versions" },
    { "show_pixel_formats", 0, {(void*)&opt_show_pixel_formats}, "show pixel format descriptions" },
    { "show_private_data", OPT_BOOL, {(void*)&show_private_data}, "show private data" },
    { "private",           OPT_BOOL, {(void*)&show_private_data}, "same as show_private_data" },
    { "bitexact", OPT_BOOL, {&do_bitexact}, "force bitexact output" },
    { "read_intervals", HAS_ARG, {.func_arg = opt_read_intervals}, "set read intervals", "read_intervals" },
    { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default}, "generic catch all option", "" },
    { "i", HAS_ARG, {.func_arg = opt_input_file_i}, "read specified file", "input_file"},
    { NULL, },
};

static inline int check_section_show_entries(int section_id)
{
    int *id;
    struct section *section = &sections[section_id];
    if (sections[section_id].show_all_entries || sections[section_id].entries_to_show)
        return 1;
    for (id = section->children_ids; *id != -1; id++)
        if (check_section_show_entries(*id))
            return 1;
    return 0;
}

#define SET_DO_SHOW(id, varname) do {                                   \
        if (check_section_show_entries(SECTION_ID_##id))                \
            do_show_##varname = 1;                                      \
    } while (0)

int main(int argc, char **argv)
{
    const Writer *w;
    WriterContext *wctx;
    char *buf;
    char *w_name = NULL, *w_args = NULL;
    int ret, i;

    av_log_set_flags(AV_LOG_SKIP_REPEATED);
    register_exit(ffprobe_cleanup);

    options = real_options;
    parse_loglevel(argc, argv, options);
    av_register_all();
    avformat_network_init();
    init_opts();
#if CONFIG_AVDEVICE
    avdevice_register_all();
#endif

    show_banner(argc, argv, options);
    parse_options(NULL, argc, argv, options, opt_input_file);

    /* mark things to show, based on -show_entries */
    SET_DO_SHOW(CHAPTERS, chapters);
    SET_DO_SHOW(ERROR, error);
    SET_DO_SHOW(FORMAT, format);
    SET_DO_SHOW(FRAMES, frames);
    SET_DO_SHOW(LIBRARY_VERSIONS, library_versions);
    SET_DO_SHOW(PACKETS, packets);
    SET_DO_SHOW(PIXEL_FORMATS, pixel_formats);
    SET_DO_SHOW(PIXEL_FORMAT_FLAGS, pixel_format_flags);
    SET_DO_SHOW(PIXEL_FORMAT_COMPONENTS, pixel_format_components);
    SET_DO_SHOW(PROGRAM_VERSION, program_version);
    SET_DO_SHOW(PROGRAMS, programs);
    SET_DO_SHOW(STREAMS, streams);
    SET_DO_SHOW(STREAM_DISPOSITION, stream_disposition);
    SET_DO_SHOW(PROGRAM_STREAM_DISPOSITION, stream_disposition);

    SET_DO_SHOW(CHAPTER_TAGS, chapter_tags);
    SET_DO_SHOW(FORMAT_TAGS, format_tags);
    SET_DO_SHOW(FRAME_TAGS, frame_tags);
    SET_DO_SHOW(PROGRAM_TAGS, program_tags);
    SET_DO_SHOW(STREAM_TAGS, stream_tags);

    if (do_bitexact && (do_show_program_version || do_show_library_versions)) {
        av_log(NULL, AV_LOG_ERROR,
               "-bitexact and -show_program_version or -show_library_versions "
               "options are incompatible\n");
        ret = AVERROR(EINVAL);
        goto end;
    }

    writer_register_all();

    if (!print_format)
        print_format = av_strdup("default");
    if (!print_format) {
        ret = AVERROR(ENOMEM);
        goto end;
    }
    w_name = av_strtok(print_format, "=", &buf);
    w_args = buf;

    if (show_data_hash) {
        if ((ret = av_hash_alloc(&hash, show_data_hash)) < 0) {
            if (ret == AVERROR(EINVAL)) {
                const char *n;
                av_log(NULL, AV_LOG_ERROR,
                       "Unknown hash algorithm '%s'\nKnown algorithms:",
                       show_data_hash);
                for (i = 0; (n = av_hash_names(i)); i++)
                    av_log(NULL, AV_LOG_ERROR, " %s", n);
                av_log(NULL, AV_LOG_ERROR, "\n");
            }
            goto end;
        }
    }

    w = writer_get_by_name(w_name);
    if (!w) {
        av_log(NULL, AV_LOG_ERROR, "Unknown output format with name '%s'\n", w_name);
        ret = AVERROR(EINVAL);
        goto end;
    }

    if ((ret = writer_open(&wctx, w, w_args,
                           sections, FF_ARRAY_ELEMS(sections))) >= 0) {
        if (w == &xml_writer)
            wctx->string_validation_utf8_flags |= AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES;

        writer_print_section_header(wctx, SECTION_ID_ROOT);

        if (do_show_program_version)
            ffprobe_show_program_version(wctx);
        if (do_show_library_versions)
            ffprobe_show_library_versions(wctx);
        if (do_show_pixel_formats)
            ffprobe_show_pixel_formats(wctx);

        if (!input_filename &&
            ((do_show_format || do_show_programs || do_show_streams || do_show_chapters || do_show_packets || do_show_error) ||
             (!do_show_program_version && !do_show_library_versions && !do_show_pixel_formats))) {
            show_usage();
            av_log(NULL, AV_LOG_ERROR, "You have to specify one input file.\n");
            av_log(NULL, AV_LOG_ERROR, "Use -h to get full help or, even better, run 'man %s'.\n", program_name);
            ret = AVERROR(EINVAL);
        } else if (input_filename) {
            ret = probe_file(wctx, input_filename);
            if (ret < 0 && do_show_error)
                show_error(wctx, ret);
        }

        writer_print_section_footer(wctx);
        writer_close(&wctx);
    }

end:
    av_freep(&print_format);
    av_freep(&read_intervals);
    av_hash_freep(&hash);

    uninit_opts();
    for (i = 0; i < FF_ARRAY_ELEMS(sections); i++)
        av_dict_free(&(sections[i].entries_to_show));

    avformat_network_deinit();

    return ret < 0;
}