GNU Radio C++ API
gr_ctcss_squelch_ff.h
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/* -*- c++ -*- */
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/*
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* Copyright 2006 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_GR_CTCSS_SQUELCH_FF_H
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#define INCLUDED_GR_CTCSS_SQUELCH_FF_H
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#include <
gr_core_api.h
>
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#include <
gr_squelch_base_ff.h
>
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#include <
gri_goertzel.h
>
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class
gr_ctcss_squelch_ff
;
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typedef
boost::shared_ptr<gr_ctcss_squelch_ff>
gr_ctcss_squelch_ff_sptr
;
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GR_CORE_API
gr_ctcss_squelch_ff_sptr
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gr_make_ctcss_squelch_ff
(
int
rate,
float
freq,
float
level
=0.01,
int
len
=0,
int
ramp
=0,
bool
gate
=
false
);
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/*!
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* \brief gate or zero output if ctcss tone not present
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* \ingroup level_blk
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*/
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class
GR_CORE_API
gr_ctcss_squelch_ff
:
public
gr_squelch_base_ff
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{
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private
:
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float
d_freq;
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float
d_level;
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int
d_len;
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bool
d_mute;
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gri_goertzel
d_goertzel_l;
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gri_goertzel
d_goertzel_c;
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gri_goertzel
d_goertzel_r;
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friend
GR_CORE_API
gr_ctcss_squelch_ff_sptr
gr_make_ctcss_squelch_ff
(
int
rate,
float
freq,
float
level,
int
len,
int
ramp,
bool
gate);
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gr_ctcss_squelch_ff
(
int
rate,
float
freq,
float
level,
int
len,
int
ramp,
bool
gate);
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int
find_tone(
float
freq);
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protected
:
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virtual
void
update_state
(
const
float
&in);
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virtual
bool
mute
()
const
{
return
d_mute; }
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public
:
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std::vector<float>
squelch_range
()
const
;
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float
level
()
const
{
return
d_level; }
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void
set_level
(
float
level) { d_level = level; }
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int
len
()
const
{
return
d_len; }
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};
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#endif
/* INCLUDED_GR_CTCSS_SQUELCH_FF_H */
gnuradio-core
src
lib
general
gr_ctcss_squelch_ff.h
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