mirror of
https://github.com/f4exb/sdrangel.git
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247 lines
8.4 KiB
C++
247 lines
8.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2024 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 "chirpchatmodencoderft.h"
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#ifndef HAS_FT8
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void ChirpChatModEncoderFT::encodeMsg(
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const QString& myCall,
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const QString& urCall,
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const QString& myLocator,
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const QString& myReport,
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const QString& textMessage,
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ChirpChatModSettings::MessageType messageType,
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unsigned int nbSymbolBits,
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std::vector<unsigned short>& symbols
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)
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{
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qDebug("ChirpChatModEncoderFT::encodeMsg: not implemented");
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}
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#else
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#include "ft8.h"
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#include "packing.h"
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void ChirpChatModEncoderFT::encodeMsg(
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const QString& myCall,
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const QString& urCall,
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const QString& myLocator,
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const QString& myReport,
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const QString& textMessage,
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ChirpChatModSettings::MessageType messageType,
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unsigned int nbSymbolBits,
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std::vector<unsigned short>& symbols
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)
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{
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int a174[174]; // FT payload is 174 bits
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if (messageType == ChirpChatModSettings::MessageNone) {
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return; // do nothing
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} else if (messageType == ChirpChatModSettings::MessageBeacon) {
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encodeMsgBeaconOrCQ(myCall, myLocator, "DE", a174);
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} else if (messageType == ChirpChatModSettings::MessageCQ) {
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encodeMsgBeaconOrCQ(myCall, myLocator, "CQ", a174);
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} else if (messageType == ChirpChatModSettings::MessageReply) {
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encodeMsgReply(myCall, urCall, myLocator, a174);
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} else if (messageType == ChirpChatModSettings::MessageReport) {
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encodeMsgReport(myCall, urCall, myReport, 0, a174);
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} else if (messageType == ChirpChatModSettings::MessageReplyReport) {
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encodeMsgReport(myCall, urCall, myReport, 1, a174);
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} else if (messageType == ChirpChatModSettings::MessageRRR) {
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encodeMsgReport(myCall, urCall, "RRR", 1, a174);
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} else if (messageType == ChirpChatModSettings::Message73) {
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encodeMsgReport(myCall, urCall, "73", 1, a174);
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} else {
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encodeTextMsg(textMessage, a174);
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}
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int allBits = ((174 / nbSymbolBits) + (174 % nbSymbolBits == 0 ? 0 : 1))*nbSymbolBits; // ensures zero bits padding
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int iBit;
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int symbol = 0;
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interleave174(a174);
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for (int i = 0; i < allBits; i++)
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{
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iBit = nbSymbolBits - (i % nbSymbolBits) - 1; // MSB first
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if (i < 174) {
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symbol += a174[i] * (1<<iBit);
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}
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if ((i % nbSymbolBits) == (nbSymbolBits - 1))
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{
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symbol = symbol ^ (symbol >> 1); // Gray code
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symbols.push_back(symbol);
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symbol = 0;
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}
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}
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}
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void ChirpChatModEncoderFT::encodeTextMsg(const QString& text, int a174[])
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{
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int a77[77];
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std::fill(a77, a77 + 77, 0);
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QString sentMsg = text.rightJustified(13, ' ', true);
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if (!FT8::Packing::packfree(a77, sentMsg.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeTextMsg: failed to encode free text message (%s)", qPrintable(sentMsg));
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return;
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}
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FT8::FT8::encode(a174, a77);
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}
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void ChirpChatModEncoderFT::encodeMsgBeaconOrCQ(const QString& myCall, const QString& myLocator, const QString& shorthand, int a174[])
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{
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int c28_1, c28_2, g15;
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if (!FT8::Packing::packcall_std(c28_1, shorthand.toUpper().toStdString())) //
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgBeaconOrCQ: failed to encode call1 (%s)", qPrintable(shorthand));
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return;
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}
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if (!FT8::Packing::packcall_std(c28_2, myCall.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgBeaconOrCQ: failed to encode call2 (%s)", qPrintable(myCall));
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return;
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}
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if (myLocator.size() < 4)
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgBeaconOrCQ: locator invalid (%s)", qPrintable(myLocator));
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return;
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}
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if (!FT8::Packing::packgrid(g15, myLocator.left(4).toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgBeaconOrCQ: failed to encode locator (%s)", qPrintable(myLocator));
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return;
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}
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int a77[77];
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std::fill(a77, a77 + 77, 0);
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FT8::Packing::pack1(a77, c28_1, c28_2, g15, 0);
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FT8::FT8::encode(a174, a77);
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}
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void ChirpChatModEncoderFT::encodeMsgReply(const QString& myCall, const QString& urCall, const QString& myLocator, int a174[])
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{
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int c28_1, c28_2, g15;
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if (!FT8::Packing::packcall_std(c28_1, urCall.toUpper().toStdString())) //
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReply: failed to encode call1 (%s)", qPrintable(urCall));
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return;
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}
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if (!FT8::Packing::packcall_std(c28_2, myCall.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReply: failed to encode call2 (%s)", qPrintable(myCall));
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return;
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}
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if (myLocator.size() < 4)
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReply: locator invalid (%s)", qPrintable(myLocator));
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return;
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}
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if (!FT8::Packing::packgrid(g15, myLocator.left(4).toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReply: failed to encode locator (%s)", qPrintable(myLocator));
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return;
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}
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int a77[77];
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std::fill(a77, a77 + 77, 0);
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FT8::Packing::pack1(a77, c28_1, c28_2, g15, 0);
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FT8::FT8::encode(a174, a77);
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}
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void ChirpChatModEncoderFT::encodeMsgReport(const QString& myCall, const QString& urCall, const QString& myReport, int reply, int a174[])
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{
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int c28_1, c28_2, g15;
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if (!FT8::Packing::packcall_std(c28_1, urCall.toUpper().toStdString())) //
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReport: failed to encode call1 (%s)", qPrintable(urCall));
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return;
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}
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if (!FT8::Packing::packcall_std(c28_2, myCall.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReport: failed to encode call2 (%s)", qPrintable(myCall));
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return;
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}
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if (!FT8::Packing::packgrid(g15, myReport.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgReport: failed to encode report (%s)", qPrintable(myReport));
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return;
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}
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int a77[77];
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std::fill(a77, a77 + 77, 0);
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FT8::Packing::pack1(a77, c28_1, c28_2, g15, reply);
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FT8::FT8::encode(a174, a77);
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}
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void ChirpChatModEncoderFT::encodeMsgFinish(const QString& myCall, const QString& urCall, const QString& shorthand, int a174[])
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{
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int c28_1, c28_2, g15;
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if (!FT8::Packing::packcall_std(c28_1, urCall.toUpper().toStdString())) //
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgFinish: failed to encode call1 (%s)", qPrintable(urCall));
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return;
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}
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if (!FT8::Packing::packcall_std(c28_2, myCall.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgFinish: failed to encode call2 (%s)", qPrintable(myCall));
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return;
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}
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if (!FT8::Packing::packgrid(g15, shorthand.toUpper().toStdString()))
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{
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qDebug("ChirpChatModEncoderFT::encodeMsgFinish: failed to encode shorthand (%s)", qPrintable(shorthand));
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return;
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}
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int a77[77];
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std::fill(a77, a77 + 77, 0);
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FT8::Packing::pack1(a77, c28_1, c28_2, g15, 0);
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FT8::FT8::encode(a174, a77);
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}
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void ChirpChatModEncoderFT::interleave174(int a174[])
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{
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// 174 = 2*3*29
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int t174[174];
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std::copy(a174, a174+174, t174);
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for (int i = 0; i < 174; i++) {
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a174[i] = t174[(i%6)*29 + (i%29)];
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}
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}
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#endif // HAS_FT8
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