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_wvps_ff.h>
28 #include <gr_io_signature.h>
35 for (int n = k-1; n > 0; n >>= 1) m++;
40 gr_make_wvps_ff(int ilen)
42 return gr_wvps_ff_sptr(new gr_wvps_ff(ilen));
45 gr_wvps_ff::gr_wvps_ff(int ilen)
46 : gr_sync_block("wvps_ff",
47 gr_make_io_signature(1, 1, sizeof(float) * ilen),
48 gr_make_io_signature(1, 1, sizeof(float) * ceil_log2(ilen))),
49 d_ilen(ilen), d_olen(ceil_log2(ilen))
53 // input vector assumed to be output from gsl wavelet computation
56 gr_wvps_ff::work(int noutput_items,
57 gr_vector_const_void_star &input_items,
58 gr_vector_void_star &output_items)
60 const float *in = (const float *) input_items[0];
61 float *out = (float *) output_items[0];
63 for (int count = 0; count < noutput_items; count++) {
68 for (int i = 0; i < d_olen; i++)
73 // get power normalization from 0-th wavelet coefficient
75 float scl = 1.0/(in[0]*in[0]);
78 // sum powers over sequences of bins,
79 // sequence lengths in increasing powers of 2
81 for (int e = 0; e < d_olen; e++) {
85 for (int l = 0; l < m; l++)
86 sum += (in[k+l]*in[k+l]);