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/* -*- c++ -*- */
/*
* Copyright 2006,2012 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_FF_IMPL_H
#define INCLUDED_GR_SQUELCH_BASE_FF_IMPL_H
#include <gnuradio/analog/squelch_base_ff.h>
#include <pmt/pmt.h>
namespace gr {
namespace analog {
class squelch_base_ff_impl : public squelch_base_ff
{
private:
int d_ramp;
int d_ramped;
bool d_gate;
double d_envelope;
enum { ST_MUTED, ST_ATTACK, ST_UNMUTED, ST_DECAY } d_state;
const pmt::pmt_t d_sob_key, d_eob_key;
bool d_tag_next_unmuted;
protected:
virtual void update_state(const float& sample){};
virtual bool mute() const { return false; };
public:
squelch_base_ff_impl(const char* name, int ramp, bool gate);
~squelch_base_ff_impl();
int ramp() const;
void set_ramp(int ramp);
bool gate() const;
void set_gate(bool gate);
bool unmuted() const;
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);
};
} /* namespace analog */
} /* namespace gr */
#endif /* INCLUDED_ANALOG_SQUELCH_BASE_IMPL_FF_H */
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