103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
/* -*- c++ -*- */
|
|
/*
|
|
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
|
|
*
|
|
* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef INCLUDED_SATNOGS_MORSE_TREE_H
|
|
#define INCLUDED_SATNOGS_MORSE_TREE_H
|
|
|
|
#include <satnogs/api.h>
|
|
#include <memory>
|
|
#include <string>
|
|
#include <satnogs/morse.h>
|
|
|
|
namespace gr {
|
|
namespace satnogs {
|
|
|
|
/*!
|
|
* \brief Binary tree node containing the corresponding character
|
|
*/
|
|
class SATNOGS_API tree_node {
|
|
private:
|
|
const char d_char;
|
|
tree_node *d_left;
|
|
tree_node *d_right;
|
|
|
|
public:
|
|
tree_node(char c);
|
|
|
|
void
|
|
set_left_child(tree_node *child);
|
|
|
|
void
|
|
set_right_child(tree_node *child);
|
|
|
|
tree_node *
|
|
get_left_child();
|
|
|
|
tree_node *
|
|
get_right_child();
|
|
|
|
char
|
|
get_char();
|
|
};
|
|
|
|
/*!
|
|
* \brief A Binary tree representation of the Morse coding scheme.
|
|
* Left transitions occur when a dot is received, whereas right transitions
|
|
* are performed during the reception of a dash.
|
|
*
|
|
* The tree follows the ITU International Morse code representation
|
|
* ITU-R M.1677-1
|
|
*/
|
|
class SATNOGS_API morse_tree {
|
|
public:
|
|
morse_tree();
|
|
morse_tree(char unrecognized);
|
|
~morse_tree();
|
|
void
|
|
reset();
|
|
bool
|
|
received_symbol(morse_symbol_t s);
|
|
std::string
|
|
get_word();
|
|
size_t
|
|
get_max_word_len() const;
|
|
size_t
|
|
get_word_len();
|
|
|
|
private:
|
|
const char d_unrecognized_symbol;
|
|
tree_node *d_root;
|
|
tree_node *d_current;
|
|
const size_t d_buff_len;
|
|
size_t d_word_len;
|
|
std::unique_ptr<char[]> d_word_buffer;
|
|
|
|
void
|
|
construct_tree();
|
|
void
|
|
delete_tree(tree_node *node);
|
|
};
|
|
|
|
} // namespace satnogs
|
|
} // namespace gr
|
|
|
|
#endif /* INCLUDED_SATNOGS_MORSE_TREE_H */
|
|
|