3 * Copyright 2005 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.
26 #include <gr_rms_ff.h>
27 #include <gr_io_signature.h>
31 gr_make_rms_ff(double alpha)
33 return gr_rms_ff_sptr(new gr_rms_ff(alpha));
36 gr_rms_ff::gr_rms_ff (double alpha)
37 : gr_sync_block ("rms_ff",
38 gr_make_io_signature(1, 1, sizeof(float)),
39 gr_make_io_signature(1, 1, sizeof(float))),
45 gr_rms_ff::~gr_rms_ff()
51 gr_rms_ff::work(int noutput_items,
52 gr_vector_const_void_star &input_items,
53 gr_vector_void_star &output_items)
55 const float *in = (const float *) input_items[0];
56 float *out = (float *) output_items[0];
58 for (int i = 0; i < noutput_items; i++){
59 double mag_sqrd = in[i]*in[i];
60 double f = d_iir.filter(mag_sqrd);
68 gr_rms_ff::set_alpha(double alpha)
70 d_iir.set_taps(alpha);