Function parse_option

fftools/cmdutils.c:380–418

}

int parse_option(void *optctx, const char *opt, const char *arg,
                 const OptionDef *options)
{
    static const OptionDef opt_avoptions = {
        .name       = "AVOption passthrough",
        .type       = OPT_TYPE_FUNC,
        .flags      = OPT_FUNC_ARG,
        .u.func_arg = opt_default,
    };

    const OptionDef *po;
    int ret;

    po = find_option(options, opt);
    if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
        /* handle 'no' bool option */
        po = find_option(options, opt + 2);
        if ((po->name && po->type == OPT_TYPE_BOOL))
            arg = "0";
    } else if (po->type == OPT_TYPE_BOOL)
        arg = "1";

    if (!po->name)
        po = &opt_avoptions;
    if (!po->name) {
        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
        return AVERROR(EINVAL);
    }
    if (opt_has_arg(po) && !arg) {
        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
        return AVERROR(EINVAL);
    }

    ret = write_option(optctx, po, opt, arg, options);
    if (ret < 0)
        return ret;

    return opt_has_arg(po);
}

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