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68 lines
2.9 KiB
C++
68 lines
2.9 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Edouard Griffiths, F4EXB //
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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 as 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 V3 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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#include "chirpchatdemoddecodertty.h"
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const char ChirpChatDemodDecoderTTY::ttyLetters[32] = {
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'_', 'E', '\n', 'A', ' ', 'S', 'I', 'U',
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'\r', 'D', 'R', 'J', 'N', 'F', 'C', 'K',
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'T', 'Z', 'L', 'W', 'H', 'Y', 'P', 'Q',
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'O', 'B', 'G', ' ', 'M', 'X', 'V', ' '
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};
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const char ChirpChatDemodDecoderTTY::ttyFigures[32] = { // U.S. standard
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'_', '3', '\n', '-', ' ', '\a', '8', '7',
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'\r', '$', '4', '\'', ',', '!', ':', '(',
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'5', '"', ')', '2', '#', '6', '0', '1',
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'9', '?', '&', ' ', '.', '/', ';', ' '
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};
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void ChirpChatDemodDecoderTTY::decodeSymbols(const std::vector<unsigned short>& symbols, QString& str)
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{
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std::vector<unsigned short>::const_iterator it = symbols.begin();
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QByteArray bytes;
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TTYState ttyState = TTYLetters;
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for (; it != symbols.end(); ++it)
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{
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char ttyChar = *it & 0x1F;
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if (ttyChar == lettersTag) {
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ttyState = TTYLetters;
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} else if (ttyChar == figuresTag) {
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ttyState = TTYFigures;
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}
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else
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{
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signed char asciiChar = -1;
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if (ttyState == TTYLetters) {
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asciiChar = ttyLetters[(int) ttyChar];
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} else if (ttyState == TTYFigures) {
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asciiChar = ttyFigures[(int) ttyChar];
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}
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if (asciiChar >= 0) {
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bytes.push_back(asciiChar);
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}
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}
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}
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str = QString(bytes.toStdString().c_str());
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}
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