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/* -*- c++ -*- */
/*
* Copyright 2006 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_SQUELCH_BASE_CC_H
#define INCLUDED_GR_SQUELCH_BASE_CC_H
#include <gr_core_api.h>
#include <gr_block.h>
class GR_CORE_API gr_squelch_base_cc : public gr_block
{
private:
int d_ramp;
int d_ramped;
bool d_gate;
double d_envelope;
enum { ST_MUTED, ST_ATTACK, ST_UNMUTED, ST_DECAY } d_state;
protected:
virtual void update_state(const gr_complex &sample) {};
virtual bool mute() const { return false; };
public:
gr_squelch_base_cc(const char *name, int ramp, bool gate);
int ramp() const { return d_ramp; }
void set_ramp(int ramp) { d_ramp = ramp; }
bool gate() const { return d_gate; }
void set_gate(bool gate) { d_gate = gate; }
bool unmuted() const { return (d_state == ST_UNMUTED || d_state == ST_ATTACK); }
virtual std::vector<float> squelch_range() const = 0;
int general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_GR_SQUELCH_BASE_CC_H */
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