Function split_commandline

ffmpeg-single-cmd/src/main/cpp/cmdutils.c:753–857

}

int split_commandline(OptionParseContext *octx, int argc, char *argv[],
                      const OptionDef *options,
                      const OptionGroupDef *groups, int nb_groups)
{
    int optindex = 1;
    int dashdash = -2;

    /* perform system-dependent conversions for arguments list */
    prepare_app_arguments(&argc, &argv);

    init_parse_context(octx, groups, nb_groups);
    av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");

    while (optindex < argc) {
        const char *opt = argv[optindex++], *arg;
        const OptionDef *po;
        int ret;

        av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);

        if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
            dashdash = optindex;
            continue;
        }
        /* unnamed group separators, e.g. output filename */
        if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
            finish_group(octx, 0, opt);
            av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
            continue;
        }
        opt++;

#define GET_ARG(arg)                                                           \
do {                                                                           \
    arg = argv[optindex++];                                                    \
    if (!arg) {                                                                \
        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
        return AVERROR(EINVAL);                                                \
    }                                                                          \
} while (0)

        /* named group separators, e.g. -i */
        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
            GET_ARG(arg);
            finish_group(octx, ret, arg);
            av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
                   groups[ret].name, arg);
            continue;
        }

        /* normal options */
        po = find_option(options, opt);
        if (po->name) {
            if (po->flags & OPT_EXIT) {
                /* optional argument, e.g. -h */
                arg = argv[optindex++];
            } else if (po->flags & HAS_ARG) {
                GET_ARG(arg);