GNU Radio 3.5.3.2 C++ API
gri_goertzel.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2006,2011 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.
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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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22 
23 #ifndef INCLUDED_GRI_GOERTZEL_H
24 #define INCLUDED_GRI_GOERTZEL_H
25 
26 #include <gr_core_api.h>
27 #include <gr_types.h>
28 
29 /*!
30  * \brief Implements Goertzel single-bin DFT calculation
31  * \ingroup misc
32  */
34 {
35 public:
37  gri_goertzel(int rate, int len, float freq);
38  void gri_setparms(int rate, int len, float freq);
39 
40  // Process a input array
41  gr_complex batch(float *in);
42 
43  // Process sample by sample
44  void input(const float &in);
45  gr_complex output();
46  bool ready() const { return d_processed == d_len; }
47 
48 private:
49  float d_d1;
50  float d_d2;
51  float d_wr;
52  float d_wi;
53  int d_len;
54  int d_processed;
55 };
56 
57 #endif /* INCLUDED_GRI_GOERTZEL_H */