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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_ANALOG_PWR_SQUELCH_FF_IMPL_H
#define INCLUDED_ANALOG_PWR_SQUELCH_FF_IMPL_H
#include <analog/pwr_squelch_ff.h>
#include "squelch_base_ff_impl.h"
#include <filter/single_pole_iir.h>
#include <cmath>
namespace gr {
namespace analog {
class ANALOG_API pwr_squelch_ff_impl :
public pwr_squelch_ff, squelch_base_ff_impl
{
private:
double d_threshold;
double d_pwr;
filter::single_pole_iir<double,double,double> d_iir;
protected:
virtual void update_state(const float &in);
virtual bool mute() const { return d_pwr < d_threshold; }
public:
pwr_squelch_ff_impl(double db, double alpha=0.0001,
int ramp=0, bool gate=false);
~pwr_squelch_ff_impl();
std::vector<float> squelch_range() const;
double threshold() const { return 10*log10(d_threshold); }
void set_threshold(double db) { d_threshold = std::pow(10.0, db/10); }
void set_alpha(double alpha) { d_iir.set_taps(alpha); }
int ramp() const { return squelch_base_ff_impl::ramp(); }
void set_ramp(int ramp) { squelch_base_ff_impl::set_ramp(ramp); }
bool gate() const { return squelch_base_ff_impl::gate(); }
void set_gate(bool gate) { squelch_base_ff_impl::set_gate(gate); }
bool unmuted() const { return squelch_base_ff_impl::unmuted(); }
int general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
return squelch_base_ff_impl::general_work(noutput_items,
ninput_items,
input_items,
output_items);
}
};
} /* namespace analog */
} /* namespace gr */
#endif /* INCLUDED_ANALOG_PWR_SQUELCH_FF_IMPL_H */
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