mirror of
https://github.com/f4exb/sdrangel.git
synced 2026-06-04 23:14:47 -04:00
Meshtastic demod: removed scheme button and useless decoders
This commit is contained in:
f4exb
@@ -20,10 +20,7 @@
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#include <cmath>
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#include "meshtasticdemoddecoder.h"
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#include "meshtasticdemoddecodertty.h"
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#include "meshtasticdemoddecoderascii.h"
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#include "meshtasticdemoddecoderlora.h"
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#include "meshtasticdemoddecoderft.h"
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#include "meshtasticdemodmsg.h"
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MeshtasticDemodDecoder::MeshtasticDemodDecoder() :
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@@ -66,98 +63,45 @@ void MeshtasticDemodDecoder::setNbSymbolBits(unsigned int spreadFactor, unsigned
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m_nbSymbolBits = m_spreadFactor - m_deBits;
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}
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void MeshtasticDemodDecoder::decodeSymbols(const std::vector<unsigned short>& symbols, QString& str)
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{
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switch(m_codingScheme)
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{
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case MeshtasticDemodSettings::CodingTTY:
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if (m_nbSymbolBits == 5) {
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MeshtasticDemodDecoderTTY::decodeSymbols(symbols, str);
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}
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break;
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case MeshtasticDemodSettings::CodingASCII:
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if (m_nbSymbolBits == 7) {
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MeshtasticDemodDecoderASCII::decodeSymbols(symbols, str);
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}
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break;
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default:
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break;
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}
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}
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void MeshtasticDemodDecoder::decodeSymbols(const std::vector<unsigned short>& symbols, QByteArray& bytes)
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{
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switch(m_codingScheme)
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if (m_nbSymbolBits >= 5)
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{
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case MeshtasticDemodSettings::CodingLoRa:
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if (m_nbSymbolBits >= 5)
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{
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unsigned int headerNbSymbolBits;
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unsigned int headerNbSymbolBits;
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if (m_hasHeader && (m_spreadFactor > 2U)) {
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headerNbSymbolBits = m_spreadFactor - 2U;
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} else {
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headerNbSymbolBits = m_nbSymbolBits;
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}
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MeshtasticDemodDecoderLoRa::decodeBytes(
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bytes,
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symbols,
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_hasHeader,
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m_hasCRC,
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m_nbParityBits,
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m_packetLength,
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m_earlyEOM,
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m_headerParityStatus,
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m_headerCRCStatus,
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m_payloadParityStatus,
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m_payloadCRCStatus
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);
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MeshtasticDemodDecoderLoRa::getCodingMetrics(
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_nbParityBits,
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m_packetLength,
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m_hasHeader,
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m_hasCRC,
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m_nbSymbols,
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m_nbCodewords
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);
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if (m_hasHeader && (m_spreadFactor > 2U)) {
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headerNbSymbolBits = m_spreadFactor - 2U;
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} else {
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headerNbSymbolBits = m_nbSymbolBits;
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}
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break;
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default:
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break;
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}
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}
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void MeshtasticDemodDecoder::decodeSymbols( //!< For FT coding scheme
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const std::vector<std::vector<float>>& mags, // vector of symbols magnitudes
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int nbSymbolBits, //!< number of bits per symbol
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std::string& msg, //!< formatted message
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std::string& call1, //!< 1st callsign or shorthand
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std::string& call2, //!< 2nd callsign
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std::string& loc, //!< locator, report or shorthand
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bool& reply //!< true if message is a reply report
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)
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{
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if (m_codingScheme != MeshtasticDemodSettings::CodingFT) {
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return;
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}
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MeshtasticDemodDecoderLoRa::decodeBytes(
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bytes,
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symbols,
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_hasHeader,
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m_hasCRC,
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m_nbParityBits,
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m_packetLength,
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m_earlyEOM,
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m_headerParityStatus,
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m_headerCRCStatus,
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m_payloadParityStatus,
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m_payloadCRCStatus
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);
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MeshtasticDemodDecoderFT::decodeSymbols(
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mags,
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nbSymbolBits,
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msg,
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call1,
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call2,
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loc,
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reply,
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m_payloadParityStatus,
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m_payloadCRCStatus
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);
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MeshtasticDemodDecoderLoRa::getCodingMetrics(
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_nbParityBits,
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m_packetLength,
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m_hasHeader,
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m_hasCRC,
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m_nbSymbols,
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m_nbCodewords
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);
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}
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}
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bool MeshtasticDemodDecoder::handleMessage(const Message& cmd)
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@@ -240,249 +184,197 @@ bool MeshtasticDemodDecoder::handleMessage(const Message& cmd)
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QDateTime dt = QDateTime::currentDateTime();
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QString msgTimestamp = dt.toString(Qt::ISODateWithMs);
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if (m_codingScheme == MeshtasticDemodSettings::CodingLoRa)
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QByteArray msgBytes;
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const std::vector<std::vector<float>>& msgMags = msg.getMagnitudes();
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const bool canSoftDecode = !msgMags.empty()
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&& (msgMags.size() >= msg.getSymbols().size())
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&& (m_spreadFactor >= 5U)
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&& (m_loRaBandwidth > 0U);
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struct LoRaDecodeState
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{
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QByteArray msgBytes;
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const std::vector<std::vector<float>>& msgMags = msg.getMagnitudes();
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const bool canSoftDecode = !msgMags.empty()
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&& (msgMags.size() >= msg.getSymbols().size())
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&& (m_spreadFactor >= 5U)
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&& (m_loRaBandwidth > 0U);
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QByteArray bytes;
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bool hasCRC;
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unsigned int nbParityBits;
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unsigned int packetLength;
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unsigned int nbSymbols;
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unsigned int nbCodewords;
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bool earlyEOM;
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int headerParityStatus;
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bool headerCRCStatus;
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int payloadParityStatus;
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bool payloadCRCStatus;
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};
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struct LoRaDecodeState
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{
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QByteArray bytes;
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bool hasCRC;
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unsigned int nbParityBits;
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unsigned int packetLength;
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unsigned int nbSymbols;
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unsigned int nbCodewords;
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bool earlyEOM;
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int headerParityStatus;
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bool headerCRCStatus;
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int payloadParityStatus;
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bool payloadCRCStatus;
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};
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auto captureLoRaState = [this](const QByteArray& bytes) -> LoRaDecodeState {
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LoRaDecodeState s;
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s.bytes = bytes;
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s.hasCRC = m_hasCRC;
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s.nbParityBits = m_nbParityBits;
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s.packetLength = m_packetLength;
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s.nbSymbols = m_nbSymbols;
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s.nbCodewords = m_nbCodewords;
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s.earlyEOM = m_earlyEOM;
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s.headerParityStatus = m_headerParityStatus;
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s.headerCRCStatus = m_headerCRCStatus;
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s.payloadParityStatus = m_payloadParityStatus;
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s.payloadCRCStatus = m_payloadCRCStatus;
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return s;
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};
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auto captureLoRaState = [this](const QByteArray& bytes) -> LoRaDecodeState {
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LoRaDecodeState s;
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s.bytes = bytes;
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s.hasCRC = m_hasCRC;
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s.nbParityBits = m_nbParityBits;
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s.packetLength = m_packetLength;
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s.nbSymbols = m_nbSymbols;
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s.nbCodewords = m_nbCodewords;
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s.earlyEOM = m_earlyEOM;
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s.headerParityStatus = m_headerParityStatus;
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s.headerCRCStatus = m_headerCRCStatus;
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s.payloadParityStatus = m_payloadParityStatus;
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s.payloadCRCStatus = m_payloadCRCStatus;
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return s;
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};
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auto restoreLoRaState = [this, &msgBytes](const LoRaDecodeState& s) {
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msgBytes = s.bytes;
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m_hasCRC = s.hasCRC;
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m_nbParityBits = s.nbParityBits;
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m_packetLength = s.packetLength;
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m_nbSymbols = s.nbSymbols;
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m_nbCodewords = s.nbCodewords;
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m_earlyEOM = s.earlyEOM;
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m_headerParityStatus = s.headerParityStatus;
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m_headerCRCStatus = s.headerCRCStatus;
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m_payloadParityStatus = s.payloadParityStatus;
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m_payloadCRCStatus = s.payloadCRCStatus;
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};
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auto restoreLoRaState = [this, &msgBytes](const LoRaDecodeState& s) {
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msgBytes = s.bytes;
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m_hasCRC = s.hasCRC;
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m_nbParityBits = s.nbParityBits;
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m_packetLength = s.packetLength;
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m_nbSymbols = s.nbSymbols;
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m_nbCodewords = s.nbCodewords;
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m_earlyEOM = s.earlyEOM;
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m_headerParityStatus = s.headerParityStatus;
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m_headerCRCStatus = s.headerCRCStatus;
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m_payloadParityStatus = s.payloadParityStatus;
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m_payloadCRCStatus = s.payloadCRCStatus;
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};
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if (canSoftDecode)
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{
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unsigned int headerNbSymbolBits;
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if (m_hasHeader && (m_spreadFactor > 2U)) {
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headerNbSymbolBits = m_spreadFactor - 2U;
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} else {
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headerNbSymbolBits = m_nbSymbolBits;
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}
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MeshtasticDemodDecoderLoRa::decodeBytesSoft(
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msgBytes,
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msgMags,
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msg.getSymbols(),
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m_spreadFactor,
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m_loRaBandwidth,
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_hasHeader,
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m_hasCRC,
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m_nbParityBits,
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m_packetLength,
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m_earlyEOM,
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m_headerParityStatus,
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m_headerCRCStatus,
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m_payloadParityStatus,
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m_payloadCRCStatus
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);
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MeshtasticDemodDecoderLoRa::getCodingMetrics(
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_nbParityBits,
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m_packetLength,
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m_hasHeader,
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m_hasCRC,
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m_nbSymbols,
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m_nbCodewords
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);
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const LoRaDecodeState softState = captureLoRaState(msgBytes);
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// Soft path is canonical for gr-lora_sdr, but if this approximation misses CRC
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// on noisy captures, retry hard decode once and keep whichever path validates.
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if (m_hasCRC && !m_payloadCRCStatus)
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{
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QByteArray hardBytes;
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decodeSymbols(msg.getSymbols(), hardBytes); // hard path updates decoder state
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const LoRaDecodeState hardState = captureLoRaState(hardBytes);
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if (hardState.payloadCRCStatus) {
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restoreLoRaState(hardState);
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} else {
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restoreLoRaState(softState);
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}
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}
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}
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else
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{
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decodeSymbols(msg.getSymbols(), msgBytes);
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}
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if (m_hasCRC && !m_payloadCRCStatus && (m_spreadFactor >= 5U))
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{
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const LoRaDecodeState baseState = captureLoRaState(msgBytes);
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const unsigned int headerNbSymbolBits = (m_hasHeader && (m_spreadFactor > 2U))
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? (m_spreadFactor - 2U)
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: m_nbSymbolBits;
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bool recovered = false;
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for (int delta : {-1, 1})
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{
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std::vector<unsigned short> shifted = msg.getSymbols();
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for (size_t i = 0; i < shifted.size(); i++)
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{
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const bool isHeader = m_hasHeader && (i < 8U);
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const unsigned int bits = isHeader ? headerNbSymbolBits : m_nbSymbolBits;
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const unsigned int mod = 1U << std::max(1U, bits);
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const int s = static_cast<int>(shifted[i]);
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const int v = (s + delta) % static_cast<int>(mod);
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shifted[i] = static_cast<unsigned short>(v < 0 ? (v + static_cast<int>(mod)) : v);
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}
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QByteArray shiftedBytes;
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decodeSymbols(shifted, shiftedBytes); // hard-path decode with adjusted symbol indices
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const LoRaDecodeState shiftedState = captureLoRaState(shiftedBytes);
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if (shiftedState.payloadCRCStatus)
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{
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restoreLoRaState(shiftedState);
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recovered = true;
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break;
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}
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}
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if (!recovered) {
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restoreLoRaState(baseState);
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}
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}
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qDebug(
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"MeshtasticDemodDecoder::handleMessage: decode symbols=%zu bytes=%lld earlyEOM=%d hCRC=%d pCRC=%d hParity=%d pParity=%d",
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msg.getSymbols().size(),
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static_cast<long long>(msgBytes.size()),
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m_earlyEOM ? 1 : 0,
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m_headerCRCStatus ? 1 : 0,
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m_payloadCRCStatus ? 1 : 0,
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m_headerParityStatus,
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m_payloadParityStatus
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);
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if (m_outputMessageQueue)
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{
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qDebug(
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"MeshtasticDemodDecoder::handleMessage: push report ts=%s bytes=%lld pCRC=%d",
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qPrintable(msgTimestamp),
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static_cast<long long>(msgBytes.size()),
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m_payloadCRCStatus ? 1 : 0
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);
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MeshtasticDemodMsg::MsgReportDecodeBytes *outputMsg = MeshtasticDemodMsg::MsgReportDecodeBytes::create(msgBytes);
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outputMsg->setFrameId(msg.getFrameId());
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outputMsg->setSyncWord(msgSyncWord);
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outputMsg->setSignalDb(msgSignalDb);
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outputMsg->setNoiseDb(msgNoiseDb);
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outputMsg->setMsgTimestamp(msgTimestamp);
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outputMsg->setPacketSize(getPacketLength());
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outputMsg->setNbParityBits(getNbParityBits());
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outputMsg->setHasCRC(getHasCRC());
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outputMsg->setNbSymbols(getNbSymbols());
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outputMsg->setNbCodewords(getNbCodewords());
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outputMsg->setEarlyEOM(getEarlyEOM());
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outputMsg->setHeaderParityStatus(getHeaderParityStatus());
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outputMsg->setHeaderCRCStatus(getHeaderCRCStatus());
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outputMsg->setPayloadParityStatus(getPayloadParityStatus());
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outputMsg->setPayloadCRCStatus(getPayloadCRCStatus());
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outputMsg->setPipelineMetadata(m_pipelineId, m_pipelineName, m_pipelinePreset);
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outputMsg->setDechirpedSpectrum(msg.getDechirpedSpectrum());
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m_outputMessageQueue->push(outputMsg);
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}
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}
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else if (m_codingScheme == MeshtasticDemodSettings::CodingFT)
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if (canSoftDecode)
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{
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std::string fmsg, call1, call2, loc;
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bool reply;
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decodeSymbols(
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msg.getMagnitudes(),
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unsigned int headerNbSymbolBits;
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if (m_hasHeader && (m_spreadFactor > 2U)) {
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headerNbSymbolBits = m_spreadFactor - 2U;
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} else {
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headerNbSymbolBits = m_nbSymbolBits;
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}
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MeshtasticDemodDecoderLoRa::decodeBytesSoft(
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msgBytes,
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msgMags,
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msg.getSymbols(),
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m_spreadFactor,
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m_loRaBandwidth,
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m_nbSymbolBits,
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fmsg,
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call1,
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call2,
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loc,
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reply
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headerNbSymbolBits,
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m_hasHeader,
|
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m_hasCRC,
|
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m_nbParityBits,
|
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m_packetLength,
|
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m_earlyEOM,
|
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m_headerParityStatus,
|
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m_headerCRCStatus,
|
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m_payloadParityStatus,
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m_payloadCRCStatus
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);
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if (m_outputMessageQueue)
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MeshtasticDemodDecoderLoRa::getCodingMetrics(
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m_nbSymbolBits,
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headerNbSymbolBits,
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m_nbParityBits,
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m_packetLength,
|
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m_hasHeader,
|
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m_hasCRC,
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m_nbSymbols,
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m_nbCodewords
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);
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const LoRaDecodeState softState = captureLoRaState(msgBytes);
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// Soft path is canonical for gr-lora_sdr, but if this approximation misses CRC
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// on noisy captures, retry hard decode once and keep whichever path validates.
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if (m_hasCRC && !m_payloadCRCStatus)
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{
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MeshtasticDemodMsg::MsgReportDecodeFT *outputMsg = MeshtasticDemodMsg::MsgReportDecodeFT::create();
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outputMsg->setSyncWord(msgSyncWord);
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outputMsg->setSignalDb(msgSignalDb);
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outputMsg->setNoiseDb(msgNoiseDb);
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outputMsg->setMsgTimestamp(msgTimestamp);
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outputMsg->setMessage(QString(fmsg.c_str()));
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outputMsg->setCall1(QString(call1.c_str()));
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outputMsg->setCall2(QString(call2.c_str()));
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outputMsg->setLoc(QString(loc.c_str()));
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outputMsg->setReply(reply);
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outputMsg->setPayloadParityStatus(getPayloadParityStatus());
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outputMsg->setPayloadCRCStatus(getPayloadCRCStatus());
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outputMsg->setPipelineMetadata(m_pipelineId, m_pipelineName, m_pipelinePreset);
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m_outputMessageQueue->push(outputMsg);
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QByteArray hardBytes;
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decodeSymbols(msg.getSymbols(), hardBytes); // hard path updates decoder state
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const LoRaDecodeState hardState = captureLoRaState(hardBytes);
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if (hardState.payloadCRCStatus) {
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restoreLoRaState(hardState);
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} else {
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restoreLoRaState(softState);
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}
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}
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}
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else
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{
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QString msgString;
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decodeSymbols(msg.getSymbols(), msgString);
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decodeSymbols(msg.getSymbols(), msgBytes);
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}
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if (m_outputMessageQueue)
|
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if (m_hasCRC && !m_payloadCRCStatus && (m_spreadFactor >= 5U))
|
||||
{
|
||||
const LoRaDecodeState baseState = captureLoRaState(msgBytes);
|
||||
const unsigned int headerNbSymbolBits = (m_hasHeader && (m_spreadFactor > 2U))
|
||||
? (m_spreadFactor - 2U)
|
||||
: m_nbSymbolBits;
|
||||
bool recovered = false;
|
||||
|
||||
for (int delta : {-1, 1})
|
||||
{
|
||||
MeshtasticDemodMsg::MsgReportDecodeString *outputMsg = MeshtasticDemodMsg::MsgReportDecodeString::create(msgString);
|
||||
outputMsg->setFrameId(msg.getFrameId());
|
||||
outputMsg->setSyncWord(msgSyncWord);
|
||||
outputMsg->setSignalDb(msgSignalDb);
|
||||
outputMsg->setNoiseDb(msgNoiseDb);
|
||||
outputMsg->setMsgTimestamp(msgTimestamp);
|
||||
outputMsg->setPipelineMetadata(m_pipelineId, m_pipelineName, m_pipelinePreset);
|
||||
m_outputMessageQueue->push(outputMsg);
|
||||
std::vector<unsigned short> shifted = msg.getSymbols();
|
||||
|
||||
for (size_t i = 0; i < shifted.size(); i++)
|
||||
{
|
||||
const bool isHeader = m_hasHeader && (i < 8U);
|
||||
const unsigned int bits = isHeader ? headerNbSymbolBits : m_nbSymbolBits;
|
||||
const unsigned int mod = 1U << std::max(1U, bits);
|
||||
const int s = static_cast<int>(shifted[i]);
|
||||
const int v = (s + delta) % static_cast<int>(mod);
|
||||
shifted[i] = static_cast<unsigned short>(v < 0 ? (v + static_cast<int>(mod)) : v);
|
||||
}
|
||||
|
||||
QByteArray shiftedBytes;
|
||||
decodeSymbols(shifted, shiftedBytes); // hard-path decode with adjusted symbol indices
|
||||
const LoRaDecodeState shiftedState = captureLoRaState(shiftedBytes);
|
||||
|
||||
if (shiftedState.payloadCRCStatus)
|
||||
{
|
||||
restoreLoRaState(shiftedState);
|
||||
recovered = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!recovered) {
|
||||
restoreLoRaState(baseState);
|
||||
}
|
||||
}
|
||||
|
||||
qDebug(
|
||||
"MeshtasticDemodDecoder::handleMessage: decode symbols=%zu bytes=%lld earlyEOM=%d hCRC=%d pCRC=%d hParity=%d pParity=%d",
|
||||
msg.getSymbols().size(),
|
||||
static_cast<long long>(msgBytes.size()),
|
||||
m_earlyEOM ? 1 : 0,
|
||||
m_headerCRCStatus ? 1 : 0,
|
||||
m_payloadCRCStatus ? 1 : 0,
|
||||
m_headerParityStatus,
|
||||
m_payloadParityStatus
|
||||
);
|
||||
|
||||
if (m_outputMessageQueue)
|
||||
{
|
||||
qDebug(
|
||||
"MeshtasticDemodDecoder::handleMessage: push report ts=%s bytes=%lld pCRC=%d",
|
||||
qPrintable(msgTimestamp),
|
||||
static_cast<long long>(msgBytes.size()),
|
||||
m_payloadCRCStatus ? 1 : 0
|
||||
);
|
||||
MeshtasticDemodMsg::MsgReportDecodeBytes *outputMsg = MeshtasticDemodMsg::MsgReportDecodeBytes::create(msgBytes);
|
||||
outputMsg->setFrameId(msg.getFrameId());
|
||||
outputMsg->setSyncWord(msgSyncWord);
|
||||
outputMsg->setSignalDb(msgSignalDb);
|
||||
outputMsg->setNoiseDb(msgNoiseDb);
|
||||
outputMsg->setMsgTimestamp(msgTimestamp);
|
||||
outputMsg->setPacketSize(getPacketLength());
|
||||
outputMsg->setNbParityBits(getNbParityBits());
|
||||
outputMsg->setHasCRC(getHasCRC());
|
||||
outputMsg->setNbSymbols(getNbSymbols());
|
||||
outputMsg->setNbCodewords(getNbCodewords());
|
||||
outputMsg->setEarlyEOM(getEarlyEOM());
|
||||
outputMsg->setHeaderParityStatus(getHeaderParityStatus());
|
||||
outputMsg->setHeaderCRCStatus(getHeaderCRCStatus());
|
||||
outputMsg->setPayloadParityStatus(getPayloadParityStatus());
|
||||
outputMsg->setPayloadCRCStatus(getPayloadCRCStatus());
|
||||
outputMsg->setPipelineMetadata(m_pipelineId, m_pipelineName, m_pipelinePreset);
|
||||
outputMsg->setDechirpedSpectrum(msg.getDechirpedSpectrum());
|
||||
m_outputMessageQueue->push(outputMsg);
|
||||
}
|
||||
|
||||
return true;
|
||||
|
||||
Reference in New Issue
Block a user