TYPE_NONE
sc->sc_chan_type[sc->sc_chan_swap ? 1 : 0] = TYPE_NONE;
sc->sc_chan_type[sc->sc_chan_swap ? 1 : 0] = TYPE_NONE;
sc->sc_chan_type[sc->sc_chan_swap ? 0 : 1] = TYPE_NONE;
if (sc->sc_chan_type[0] == TYPE_NONE &&
sc->sc_chan_type[1] == TYPE_NONE)
case TYPE_NONE:
if (jmidesc->sc_chan_type[channel] == TYPE_NONE) {