blob: d5c3fb250b2122daa584fafa853ad1a3cfc2cc02 (
plain)
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
|
/* -*- c++ -*- */
/*
* Copyright 2006,2011,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_FFT_IMPL_GOERTZEL_H
#define INCLUDED_FFT_IMPL_GOERTZEL_H
#include <gnuradio/fft/api.h>
#include <gnuradio/types.h>
namespace gr {
namespace fft {
/*!
* \brief Implements Goertzel single-bin DFT calculation
* \ingroup misc
*/
class FFT_API goertzel
{
public:
goertzel(int rate, int len, float freq);
void set_params(int rate, int len, float freq);
// Process a input array
gr_complex batch(const float* in);
// Process sample by sample
void input(const float& in);
gr_complex output();
bool ready() const { return d_processed == d_len; }
private:
float d_d1;
float d_d2;
float d_wr;
float d_wi;
int d_len;
int d_processed;
};
} /* namespace fft */
} /* namespace gr */
#endif /* INCLUDED_FFT_IMPL_GOERTZEL_H */
|
