EVEN_F
field = ( bktr_status & BT848_INT_FIELD ) ? EVEN_F : ODD_F;
(VBI_CAPTURE|VBI_OPEN) && (field == EVEN_F)) {
case METEOR_WANT_EVEN : w_field = EVEN_F ; break;
default : w_field = (ODD_F|EVEN_F); break;
case METEOR_ONLY_EVEN_FIELDS : req_field = EVEN_F ; break;
default : req_field = (ODD_F|EVEN_F);
if (( field == EVEN_F ) && ( w_field == EVEN_F ))
else if (( field == ODD_F ) && ( req_field == (ODD_F|EVEN_F) ) &&
( w_field == (ODD_F|EVEN_F) ))
else if (( field == ODD_F ) && ( req_field == (ODD_F|EVEN_F) ) &&