TYPEMAP
dvd_reader_t       *  O_OBJECT
ifo_handle_t       *  O_OBJECT
sv_pgc_t           *  O_OBJECT
sv_cell_playback_t *  O_OBJECT
dvd_file_t         *  O_OBJECT

INPUT
O_OBJECT
    if (sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG))
        $var = ($type)SvIV((SV*)SvRV( $arg ));
    else {
        warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
        XSRETURN_UNDEF;
    }

OUTPUT
O_OBJECT
        sv_setref_pv( $arg, (char *)CLASS, (void*)$var );