3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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 2, or (at your option)
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.
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.
23 #ifndef INCLUDED_GR_SQUELCH_BASE_CC_H
24 #define INCLUDED_GR_SQUELCH_BASE_CC_H
28 class gr_squelch_base_cc : public gr_block
35 enum { ST_MUTED, ST_ATTACK, ST_UNMUTED, ST_DECAY } d_state;
38 virtual void update_state(const gr_complex &sample) {};
39 virtual bool mute() const { return false; };
42 gr_squelch_base_cc(const char *name, int ramp, bool gate);
44 int ramp() const { return d_ramp; }
45 void set_ramp(int ramp) { d_ramp = ramp; }
46 bool gate() const { return d_gate; }
47 void set_gate(bool gate) { d_gate = gate; }
48 bool unmuted() const { return (d_state == ST_UNMUTED || d_state == ST_ATTACK); }
50 virtual std::vector<float> squelch_range() const = 0;
52 int general_work (int noutput_items,
53 gr_vector_int &ninput_items,
54 gr_vector_const_void_star &input_items,
55 gr_vector_void_star &output_items);
58 #endif /* INCLUDED_GR_SQUELCH_BASE_CC_H */