115 lines
3.4 KiB
C++
115 lines
3.4 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) 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include "cw_encoder_impl.h"
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namespace gr {
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namespace satnogs {
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const std::vector<char> cw_encoder_impl::cw_chars (
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{ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
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'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2',
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'3', '4', '5', '6', '7', '8', '9', '0' });
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const std::vector<std::string> cw_encoder_impl::cw_symbols (
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{ ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..",
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".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.",
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"...", "-", "..-", "...-", ".--", "-..-", "-.--", "--..", ".----",
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"..---", "...--", "....-", ".....", "-....", "--...", "---..",
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"----.", "-----" });
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cw_encoder::sptr
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cw_encoder::make(double samp_rate, double cw_freq, size_t wpm)
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{
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return gnuradio::get_initial_sptr
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(new cw_encoder_impl(samp_rate, cw_freq, wpm));
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}
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/*
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* The private constructor
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*/
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cw_encoder_impl::cw_encoder_impl(double samp_rate, double cw_freq,
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size_t wpm)
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: gr::sync_block("cw_encoder",
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gr::io_signature::make(0, 0, 0),
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gr::io_signature::make(1, 1, sizeof(gr_complex))),
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d_samp_rate (samp_rate),
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d_cw_freq (cw_freq),
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d_wpm (wpm),
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d_nco (),
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d_word (new uint8_t[2048]),
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d_remaining (0)
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{
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message_port_register_in(pmt::mp("word"));
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d_nco.set_freq ((2 * M_PI * cw_freq) / samp_rate);
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}
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/*
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* Our virtual destructor.
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*/
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cw_encoder_impl::~cw_encoder_impl()
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{
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delete [] d_word;
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}
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static inline size_t
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find_char_idx(const char* characters, size_t len, char c)
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{
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size_t i;
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for(i = 0; i < len; i++) {
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if(characters[i] == c){
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return i;
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}
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}
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return len;
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}
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std::string
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cw_encoder_impl::get_cw_symbol (char c)
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{
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size_t i;
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for(i = 0; i < cw_chars.size(); i++) {
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if(cw_chars[i] == c) {
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return cw_symbols[i];
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}
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}
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return "";
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}
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int
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cw_encoder_impl::work(int noutput_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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gr_complex *out = (gr_complex *) output_items[0];
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// Tell runtime system how many output items we produced.
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return noutput_items;
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}
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} /* namespace satnogs */
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} /* namespace gr */
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