117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
/* -*- c++ -*- */
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/*
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* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
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*
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* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
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*
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* This program 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 of the License, or
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* (at your option) any later version.
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*
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* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_SATNOGS_CW_TO_SYMBOL_IMPL_H
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#define INCLUDED_SATNOGS_CW_TO_SYMBOL_IMPL_H
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#include <satnogs/morse.h>
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#include <satnogs/cw_to_symbol.h>
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namespace gr
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{
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namespace satnogs
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{
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class cw_to_symbol_impl : public cw_to_symbol
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{
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typedef enum {
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IDLE,
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SHORT_ON_PERIOD,
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LONG_ON_PERIOD,
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SHORT_OFF_PERIOD,
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LONG_OFF_PERIOD
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} cw_state_t;
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/**
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* Different states during the WPM auto synchronization
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*/
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typedef enum {
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SYNC_TRIGGER_OFF,//!< SYNC_TRIGGER_OFF Signal is below threshold
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SYNC_TRIGGER_ON //!< SYNC_TRIGGER_ON Signal is above threshold
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} sync_state_t;
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private:
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const double d_sampling_rate;
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float d_act_thrshld;
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const float d_confidence_level;
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const size_t d_sync_limit;
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const bool d_auto_sync;
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size_t d_dot_samples;
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size_t d_dash_samples;
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size_t d_short_pause_samples;
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size_t d_long_pause_samples;
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cw_state_t d_state;
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size_t d_state_cnt;
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size_t d_pause_cnt;
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size_t d_est_cnt;
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size_t d_mean_cnt;
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bool d_have_sync;
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bool d_seq_started;
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sync_state_t d_sync_state;
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inline void
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set_idle ();
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inline void
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set_short_on ();
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inline void
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set_long_on ();
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inline void
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set_short_off ();
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inline void
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set_long_off ();
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inline void
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send_symbol_msg (morse_symbol_t s);
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void set_act_threshold_msg_handler(pmt::pmt_t msg);
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void sync_msg_handler(pmt::pmt_t msg);
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void estimate_dot_duration(size_t estimate);
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void set_symbols_duration();
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void reset_sync();
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public:
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cw_to_symbol_impl (double sampling_rate, float threshold,
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float conf_level, size_t wpm, bool auto_config);
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~cw_to_symbol_impl ();
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// Where all the action really happens
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int
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work (int noutput_items, gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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void set_act_threshold(float thrhld);
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void start_timing_recovery();
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};
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} // namespace satnogs
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} // namespace gr
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#endif /* INCLUDED_SATNOGS_CW_TO_SYMBOL_IMPL_H */
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