1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* -*- c++ -*- */
/*
* Copyright 2005,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gr_nlog10_ff.h>
#include <gr_io_signature.h>
#include <algorithm>
gr_nlog10_ff_sptr
gr_make_nlog10_ff (float n, unsigned vlen, float k)
{
return gnuradio::get_initial_sptr(new gr_nlog10_ff(n, vlen, k));
}
gr_nlog10_ff::gr_nlog10_ff(float n, unsigned vlen, float k)
: gr_sync_block("nlog10_ff",
gr_make_io_signature(1, 1, sizeof(float) * vlen),
gr_make_io_signature(1, 1, sizeof(float) * vlen)),
d_vlen(vlen), d_n(n), d_k(k)
{
}
gr_nlog10_ff::~gr_nlog10_ff()
{
}
int
gr_nlog10_ff::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];
int noi = noutput_items * d_vlen;
float n = d_n;
float k = d_k;
for (int i = 0; i < noi; i++)
out[i] = n * log10(std::max(in[i], (float) 1e-18)) + k;
return noutput_items;
}
|
