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 2, 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., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
27 #include <trellis_metrics_i.h>
28 #include <gr_io_signature.h>
34 trellis_metrics_i_sptr
35 trellis_make_metrics_i (const int O, const int D, const std::vector<int> &TABLE, trellis_metric_type_t TYPE)
37 return trellis_metrics_i_sptr (new trellis_metrics_i (O,D,TABLE,TYPE));
42 trellis_metrics_i::trellis_metrics_i (const int O, const int D, const std::vector<int> &TABLE, trellis_metric_type_t TYPE)
43 : gr_block ("metrics_i",
44 gr_make_io_signature (1, -1, sizeof (int)),
45 gr_make_io_signature (1, -1, sizeof (float))),
51 set_relative_rate (1.0 * d_O / ((double) d_D));
52 set_output_multiple ((int)d_O);
59 trellis_metrics_i::forecast (int noutput_items, gr_vector_int &ninput_items_required)
61 assert (noutput_items % d_O == 0);
62 int input_required = d_D * noutput_items / d_O;
63 unsigned ninputs = ninput_items_required.size();
64 for (unsigned int i = 0; i < ninputs; i++)
65 ninput_items_required[i] = input_required;
71 trellis_metrics_i::general_work (int noutput_items,
72 gr_vector_int &ninput_items,
73 gr_vector_const_void_star &input_items,
74 gr_vector_void_star &output_items)
77 assert (noutput_items % d_O == 0);
78 assert (input_items.size() == output_items.size());
79 int nstreams = input_items.size();
81 for (int m=0;m<nstreams;m++) {
82 const int *in = (int *) input_items[m];
83 float *out = (float *) output_items[m];
85 for (int i = 0; i < noutput_items / d_O ; i++){
87 calc_metric_s(d_O, d_D, d_TABLE,&(in[i*d_D]),&(out[i*d_O]), d_TYPE);
89 calc_metric_i(d_O, d_D, d_TABLE,&(in[i*d_D]),&(out[i*d_O]), d_TYPE);
91 calc_metric_f(d_O, d_D, d_TABLE,&(in[i*d_D]),&(out[i*d_O]), d_TYPE);
93 calc_metric_c(d_O, d_D, d_TABLE,&(in[i*d_D]),&(out[i*d_O]), d_TYPE);
98 consume_each (d_D * noutput_items / d_O);