105 lines
2.6 KiB
C++
105 lines
2.6 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) 2016,2017
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* 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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{
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NO_SYNC, SEARCH_DOT, SEARCH_DASH, SEARCH_SPACE
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} cw_dec_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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size_t d_dot_samples;
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size_t d_window_size;
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size_t d_window_cnt;
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size_t d_idle_cnt;
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size_t d_dot_windows_num;
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size_t d_dash_windows_num;
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size_t d_short_pause_windows_num;
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size_t d_long_pause_windows_num;
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cw_dec_state_t d_dec_state;
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bool d_prev_space_symbol;
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float *d_const_val;
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float *d_tmp;
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int32_t *d_out;
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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_search_space ();
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inline void
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clamp_input (int32_t *out, const float *in, size_t len);
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inline bool
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is_triggered (const float *in, size_t len);
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inline void
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send_symbol_msg (morse_symbol_t s);
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inline bool
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check_conf_level(size_t cnt, size_t target);
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void
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set_act_threshold_msg_handler (pmt::pmt_t msg);
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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, size_t hysteresis);
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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
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set_act_threshold (float thrhld);
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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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