GNU Radio Manual and C++ API Reference 3.8.5.0
The Free & Open Software Radio Ecosystem
 
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goertzel.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2006,2011,2012 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
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)
10 * any later version.
11 *
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.
16 *
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.
21 */
22
23#ifndef INCLUDED_FFT_IMPL_GOERTZEL_H
24#define INCLUDED_FFT_IMPL_GOERTZEL_H
25
26#include <gnuradio/fft/api.h>
27#include <gnuradio/types.h>
28
29namespace gr {
30namespace fft {
31
32/*!
33 * \brief Implements Goertzel single-bin DFT calculation
34 * \ingroup misc
35 */
37{
38public:
39 goertzel(int rate, int len, float freq);
40
41 void set_params(int rate, int len, float freq);
42
43 // Process a input array
44 gr_complex batch(float* in);
45
46 // Process sample by sample
47 void input(const float& in);
49 bool ready() const { return d_processed == d_len; }
50
51private:
52 float d_d1;
53 float d_d2;
54 float d_wr;
55 float d_wi;
56 int d_len;
57 int d_processed;
58};
59
60} /* namespace fft */
61} /* namespace gr */
62
63#endif /* INCLUDED_FFT_IMPL_GOERTZEL_H */
Implements Goertzel single-bin DFT calculation.
Definition goertzel.h:37
goertzel(int rate, int len, float freq)
bool ready() const
Definition goertzel.h:49
void input(const float &in)
gr_complex output()
void set_params(int rate, int len, float freq)
gr_complex batch(float *in)
#define FFT_API
Definition gr-fft/include/gnuradio/fft/api.h:30
std::complex< float > gr_complex
Definition gr_complex.h:27
GNU Radio logging wrapper for log4cpp library (C++ port of log4j)
Definition basic_block.h:46