GNU Radio Manual and C++ API Reference  3.7.9.2
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ctcss_squelch_ff.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2006,2012 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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15  * GNU General Public License for more details.
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22 
23 #ifndef INCLUDED_ANALOG_CTCSS_SQUELCH_FF_H
24 #define INCLUDED_ANALOG_CTCSS_SQUELCH_FF_H
25 
26 #include <gnuradio/analog/api.h>
28 #include <gnuradio/block.h>
29 
30 namespace gr {
31  namespace analog {
32 
33  /*!
34  * \brief gate or zero output if CTCSS tone not present
35  * \ingroup level_controllers_blk
36  */
38  public squelch_base_ff, virtual public block
39  {
40  protected:
41  virtual void update_state(const float &in) = 0;
42  virtual bool mute() const = 0;
43 
44  public:
45  // gr::analog::ctcss_squelch_ff::sptr
46  typedef boost::shared_ptr<ctcss_squelch_ff> sptr;
47 
48  /*!
49  * \brief Make CTCSS tone squelch block.
50  *
51  * \param rate gain of the internal frequency filters.
52  * \param freq frequency value to use as the squelch tone.
53  * \param level threshold level for the squelch tone.
54  * \param len length of the frequency filters.
55  * \param ramp sets response characteristic.
56  * \param gate if true, no output if no squelch tone.
57  * if false, output 0's if no squelch tone.
58  */
59  static sptr make(int rate, float freq, float level,
60  int len, int ramp, bool gate);
61 
62  virtual std::vector<float> squelch_range() const = 0;
63  virtual float level() const = 0;
64  virtual void set_level(float level) = 0;
65  virtual int len() const = 0;
66  virtual float frequency() const = 0;
67  virtual void set_frequency(float frequency) = 0;
68 
69  virtual int ramp() const = 0;
70  virtual void set_ramp(int ramp) = 0;
71  virtual bool gate() const = 0;
72  virtual void set_gate(bool gate) = 0;
73  virtual bool unmuted() const = 0;
74  };
75 
76  } /* namespace analog */
77 } /* namespace gr */
78 
79 #endif /* INCLUDED_ANALOG_CTCSS_SQUELCH_FF_H */
basic squelch block; to be subclassed for other squelches.
Definition: squelch_base_ff.h:36
Include this header to use the message passing features.
Definition: logger.h:131
gate or zero output if CTCSS tone not present
Definition: ctcss_squelch_ff.h:37
boost::shared_ptr< ctcss_squelch_ff > sptr
Definition: ctcss_squelch_ff.h:46
#define ANALOG_API
Definition: gr-analog/include/gnuradio/analog/api.h:30
The abstract base class for all 'terminal' processing blocks.A signal processing flow is constructed ...
Definition: block.h:60