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122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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 <QDebug>
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#include "meshtasticmodencoder.h"
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#include "meshtasticmodencoderlora.h"
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#include "meshtasticpacket.h"
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const MeshtasticModSettings::CodingScheme MeshtasticModEncoder::m_codingScheme = MeshtasticModSettings::CodingLoRa;
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MeshtasticModEncoder::MeshtasticModEncoder() :
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m_nbSymbolBits(5),
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m_nbParityBits(1),
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m_hasCRC(true),
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m_hasHeader(true)
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{}
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MeshtasticModEncoder::~MeshtasticModEncoder()
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{}
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void MeshtasticModEncoder::setNbSymbolBits(unsigned int spreadFactor, unsigned int deBits)
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{
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m_spreadFactor = spreadFactor;
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if (deBits >= spreadFactor) {
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m_deBits = m_spreadFactor - 1;
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} else {
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m_deBits = deBits;
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}
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m_nbSymbolBits = m_spreadFactor - m_deBits;
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}
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void MeshtasticModEncoder::encode(MeshtasticModSettings settings, std::vector<unsigned short>& symbols)
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{
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if (m_nbSymbolBits >= 5)
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{
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QByteArray bytes;
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QString summary;
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QString error;
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if (modemmeshtastic::Packet::isCommand(settings.m_textMessage))
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{
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if (!modemmeshtastic::Packet::buildFrameFromCommand(settings.m_textMessage, bytes, summary, error))
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{
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qWarning() << "MeshtasticModEncoder::encode: Meshtastic command error:" << error;
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return;
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}
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qInfo() << "MeshtasticModEncoder::encode:" << summary;
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}
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else
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{
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bytes = settings.m_textMessage.toUtf8();
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}
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encodeBytesLoRa(bytes, symbols);
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}
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}
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void MeshtasticModEncoder::encodeBytes(const QByteArray& bytes, std::vector<unsigned short>& symbols)
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{
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switch (m_codingScheme)
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{
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case MeshtasticModSettings::CodingLoRa:
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{
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QByteArray payload(bytes);
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if (modemmeshtastic::Packet::isCommand(QString::fromUtf8(bytes)))
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{
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QString summary;
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QString error;
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if (!modemmeshtastic::Packet::buildFrameFromCommand(QString::fromUtf8(bytes), payload, summary, error))
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{
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qWarning() << "MeshtasticModEncoder::encodeBytes: Meshtastic command error:" << error;
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return;
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}
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qInfo() << "MeshtasticModEncoder::encodeBytes:" << summary;
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}
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encodeBytesLoRa(payload, symbols);
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break;
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}
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default:
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break;
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};
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}
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void MeshtasticModEncoder::encodeBytesLoRa(const QByteArray& bytes, std::vector<unsigned short>& symbols)
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{
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QByteArray payload(bytes);
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if ((payload.size() + (m_hasCRC ? 2 : 0)) > 255)
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{
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qWarning() << "MeshtasticModEncoder::encodeBytesLoRa: payload too large:" << payload.size();
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return;
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}
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if (m_hasCRC) {
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MeshtasticModEncoderLoRa::addChecksum(payload);
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}
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MeshtasticModEncoderLoRa::encodeBytes(payload, symbols, m_nbSymbolBits, m_hasHeader, m_hasCRC, m_nbParityBits);
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}
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