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 <gr_single_pole_avg_filter_ff.h>
28 #include <gr_io_signature.h>
32 gr_single_pole_avg_filter_ff_sptr
33 gr_make_single_pole_avg_filter_ff (double alpha, unsigned int vlen)
35 return gr_single_pole_avg_filter_ff_sptr(new gr_single_pole_avg_filter_ff(alpha, vlen));
38 gr_single_pole_avg_filter_ff::gr_single_pole_avg_filter_ff (
39 double alpha, unsigned int vlen)
40 : gr_sync_block ("single_pole_avg_filter_ff",
41 gr_make_io_signature (1, 1, sizeof (float) * vlen),
42 gr_make_io_signature (1, 1, sizeof (float) * vlen)),
43 d_vlen(vlen), d_rec(vlen)
48 gr_single_pole_avg_filter_ff::~gr_single_pole_avg_filter_ff ()
54 gr_single_pole_avg_filter_ff::set_taps (double alpha)
56 for (unsigned int i = 0; i < d_vlen; i++)
57 d_rec[i].set_taps(alpha);
61 gr_single_pole_avg_filter_ff::work (int noutput_items,
62 gr_vector_const_void_star &input_items,
63 gr_vector_void_star &output_items)
65 const float *in = (const float *) input_items[0];
66 float *out = (float *) output_items[0];
67 unsigned int vlen = d_vlen;
70 for (int i = 0; i < noutput_items; i++)
71 out[i] = d_rec[0].filter (in[i]);
74 for (int i = 0; i < noutput_items; i++){
75 for (unsigned int j = 0; j < vlen; j++){
76 *out++ = d_rec[j].filter (*in++);