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., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <gr_filter_delay_fc.h>
28 #include <gr_fir_fff.h>
29 #include <gr_fir_util.h>
32 gr_filter_delay_fc_sptr
33 gr_make_filter_delay_fc (const std::vector<float> &taps)
35 return gr_filter_delay_fc_sptr (new gr_filter_delay_fc (taps));
38 gr_filter_delay_fc::gr_filter_delay_fc (const std::vector<float> &taps)
39 : gr_sync_block ("filter_delay_fc",
40 gr_make_io_signature (1, 2, sizeof (float)),
41 gr_make_io_signature (1, 1, sizeof (gr_complex)))
43 d_fir = gr_fir_util::create_gr_fir_fff (taps);
44 d_delay = d_fir->ntaps () / 2;
45 set_history (d_fir->ntaps ());
48 gr_filter_delay_fc::~gr_filter_delay_fc ()
54 gr_filter_delay_fc::work (int noutput_items,
55 gr_vector_const_void_star &input_items,
56 gr_vector_void_star &output_items)
58 float *in0 = (float *) input_items[0];
59 float *in1 = (float *) input_items[1];
60 gr_complex *out = (gr_complex *) output_items[0];
62 switch (input_items.size ()){
64 for (int i = 0; i < noutput_items; i++)
65 out[i] = gr_complex (in0[i + d_delay],
66 d_fir->filter (&in0[i]));
70 for (int j = 0; j < noutput_items; j++)
71 out[j] = gr_complex (in0[j + d_delay],
72 d_fir->filter (&in1[j]));