msf2hsg
th->len = msf2hsg(sc->volinfo.vol_msf, 0);
lba = msf2hsg(sc->toc[trk].toc.absolute_pos, 0);
static daddr_t msf2hsg(bcd_t *, int);
lba = msf2hsg(q.current.relative_pos, 1);
lba = msf2hsg(q.current.absolute_pos, 0);
size = msf2hsg(sc->volinfo.vol_msf, 0);