3 * Copyright 2004 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <trellis_encoder_bb.h>
28 #include <gr_io_signature.h>
31 trellis_encoder_bb_sptr
32 trellis_make_encoder_bb (const fsm &FSM, int ST)
34 return trellis_encoder_bb_sptr (new trellis_encoder_bb (FSM,ST));
37 trellis_encoder_bb::trellis_encoder_bb (const fsm &FSM, int ST)
38 : gr_sync_block ("encoder_bb",
39 gr_make_io_signature (1, -1, sizeof (unsigned char)),
40 gr_make_io_signature (1, -1, sizeof (unsigned char))),
49 trellis_encoder_bb::work (int noutput_items,
50 gr_vector_const_void_star &input_items,
51 gr_vector_void_star &output_items)
55 assert (input_items.size() == output_items.size());
56 int nstreams = input_items.size();
58 for (int m=0;m<nstreams;m++) {
59 const unsigned char *in = (const unsigned char *) input_items[m];
60 unsigned char *out = (unsigned char *) output_items[m];
63 // per stream processing
64 for (int i = 0; i < noutput_items; i++){
65 out[i] = (unsigned char) d_FSM.OS()[ST_tmp*d_FSM.I()+in[i]]; // direction of time?
66 ST_tmp = (int) d_FSM.NS()[ST_tmp*d_FSM.I()+in[i]];
68 // end per stream processing