GNU Radio 3.6.5.1 C++ API
gr_probe_avg_mag_sqrd_c.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2005,2006 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  *
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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 #ifndef INCLUDED_GR_PROBE_AVG_MAG_SQRD_C_H
23 #define INCLUDED_GR_PROBE_AVG_MAG_SQRD_C_H
24 
25 #include <gr_core_api.h>
26 #include <gr_sync_block.h>
27 #include <gr_single_pole_iir.h>
28 
31 
33 gr_make_probe_avg_mag_sqrd_c (double threshold_db, double alpha = 0.0001);
34 
35 /*!
36  * \brief compute avg magnitude squared.
37  *
38  * input: gr_complex
39  *
40  * Compute a running average of the magnitude squared of the the input.
41  * The level and indication as to whether the level exceeds threshold
42  * can be retrieved with the level and unmuted accessors.
43  */
45 {
46  double d_threshold;
48  bool d_unmuted;
49  double d_level;
50 
52  gr_make_probe_avg_mag_sqrd_c (double threshold_db, double alpha);
53 
54  gr_probe_avg_mag_sqrd_c (double threshold_db, double alpha);
55 
56 public:
58 
59  int work (int noutput_items,
60  gr_vector_const_void_star &input_items,
61  gr_vector_void_star &output_items);
62 
63  // ACCESSORS
64  bool unmuted () const { return d_unmuted; }
65  double level () const { return d_level; }
66 
67  double threshold() const;
68 
69  // SETTERS
70  void set_alpha (double alpha);
71  void set_threshold (double decibels);
72 };
73 
74 #endif /* INCLUDED_GR_PROBE_AVG_MAG_SQRD_C_H */