enc_sil_do
void enc_sil_do(struct conv *, unsigned char *, int);
enc_sil_do(&s->sub.enc, data, s->round);
enc_sil_do(&s->sub.enc, odata, s->round);
void enc_sil_do(struct conv *, unsigned char *, int);
enc_sil_do(&conv, data, f->ralign / s->mix.bpf);