gr-baz Package
squelch_base_ff_impl.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
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef INCLUDED_GR_SQUELCH_BASE_FF_IMPL_H
24 #define INCLUDED_GR_SQUELCH_BASE_FF_IMPL_H
25 
26 #include <analog/squelch_base_ff.h>
27 
28 namespace gr {
29  namespace analog {
30 
32  {
33  private:
34  int d_ramp;
35  int d_ramped;
36  bool d_gate;
37  double d_envelope;
38  enum { ST_MUTED, ST_ATTACK, ST_UNMUTED, ST_DECAY } d_state;
39 
40  protected:
41  virtual void update_state(const float &sample) {};
42  virtual bool mute() const { return false; };
43 
44  public:
45  squelch_base_ff_impl(const char *name, int ramp, bool gate);
47 
48  int ramp() const;
49  void set_ramp(int ramp);
50  bool gate() const;
51  void set_gate(bool gate);
52  bool unmuted() const;
53 
54  virtual std::vector<float> squelch_range() const = 0;
55 
56  int general_work(int noutput_items,
57  gr_vector_int &ninput_items,
58  gr_vector_const_void_star &input_items,
59  gr_vector_void_star &output_items);
60  };
61 
62  } /* namespace analog */
63 } /* namespace gr */
64 
65 #endif /* INCLUDED_ANALOG_SQUELCH_BASE_IMPL_FF_H */