73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2006, 2007 Frank (Radio Rausch)
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* Copyright 2011 Steve Glass
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*
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* This file is part of OP25.
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*
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* This 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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* This software 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 this software; 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_OP25_FSK4_DEMOD_FF_IMPL_H
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#define INCLUDED_OP25_FSK4_DEMOD_FF_IMPL_H
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#include <op25/fsk4_demod_ff.h>
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namespace gr {
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namespace op25 {
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class fsk4_demod_ff_impl : public fsk4_demod_ff
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{
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private:
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const float d_block_rate;
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boost::scoped_array<float> d_history;
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size_t d_history_last;
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gr::msg_queue::sptr d_queue;
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double d_symbol_clock;
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double d_symbol_spread;
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const float d_symbol_time;
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double fine_frequency_correction;
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double coarse_frequency_correction;
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/**
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* Called when we want the input frequency to be adjusted.
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*/
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void send_frequency_correction();
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/**
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* Tracking loop.
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*/
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bool tracking_loop_mmse(float input, float *output);
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public:
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fsk4_demod_ff_impl(gr::msg_queue::sptr queue, float sample_rate_Hz, float symbol_rate_Hz);
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~fsk4_demod_ff_impl();
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// Where all the action really happens
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void forecast (int noutput_items, gr_vector_int &ninput_items_required);
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int general_work(int noutput_items,
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gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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};
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} // namespace op25
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} // namespace gr
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#endif /* INCLUDED_OP25_FSK4_DEMOD_FF_IMPL_H */
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