GNU Radio Manual and C++ API Reference  3.7.9.2
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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
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10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
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14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
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17  * You should have received a copy of the GNU General Public License
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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 
29 namespace gr {
30  namespace fft {
31 
32  /*!
33  * \brief Implements Goertzel single-bin DFT calculation
34  * \ingroup misc
35  */
37  {
38  public:
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);
48  gr_complex output();
49  bool ready() const { return d_processed == d_len; }
50 
51  private:
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 */
#define FFT_API
Definition: gr-fft/include/gnuradio/fft/api.h:30
std::complex< float > gr_complex
Definition: gr_complex.h:27
bool ready() const
Definition: goertzel.h:49
Implements Goertzel single-bin DFT calculation.
Definition: goertzel.h:36
Include this header to use the message passing features.
Definition: logger.h:131