static int skip_input(DBEContext *s, int nb_words)
{
    if (nb_words > s->input_size) {
        av_log(s->avctx, AV_LOG_ERROR, "Packet too short\n");
        return AVERROR_INVALIDDATA;
    }

    s->input      += nb_words * s->word_bytes;
    s->input_size -= nb_words;
    return 0;
}