kopia lustrzana https://github.com/f4exb/sdrangel
369 wiersze
14 KiB
C++
369 wiersze
14 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2022 Edouard Griffiths, F4EXB //
|
|
// //
|
|
// 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 as 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 V3 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <codec2/codec2.h>
|
|
|
|
#include "M17Modulator.h"
|
|
#include "maincore.h"
|
|
|
|
#include "m17modax25.h"
|
|
#include "m17modprocessor.h"
|
|
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgSendSMS, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgSendAPRS, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgSendAudioFrame, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgStartAudio, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgStopAudio, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgStartBERT, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgSendBERTFrame, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgStopBERT, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgSetGNSS, Message)
|
|
MESSAGE_CLASS_DEFINITION(M17ModProcessor::MsgStopGNSS, Message)
|
|
|
|
M17ModProcessor::M17ModProcessor() :
|
|
m_m17Modulator("MYCALL", ""),
|
|
m_lichSegmentIndex(0),
|
|
m_audioFrameIndex(0),
|
|
m_audioFrameNumber(0)
|
|
{
|
|
m_basebandFifo.setSize(96000);
|
|
m_basebandFifoLow = 4096;
|
|
m_basebandFifoHigh = 96000 - m_basebandFifoLow;
|
|
m_decimator.initialize(8000.0, 3000.0, 6);
|
|
m_codec2 = ::codec2_create(CODEC2_MODE_3200);
|
|
connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
|
|
}
|
|
|
|
M17ModProcessor::~M17ModProcessor()
|
|
{
|
|
codec2_destroy(m_codec2);
|
|
}
|
|
|
|
bool M17ModProcessor::handleMessage(const Message& cmd)
|
|
{
|
|
if (MsgSendSMS::match(cmd))
|
|
{
|
|
const MsgSendSMS& notif = (const MsgSendSMS&) cmd;
|
|
QByteArray packetBytes = notif.getSMSText().toUtf8();
|
|
packetBytes.prepend(0x05); // SMS standard type
|
|
packetBytes.truncate(798); // Maximum packet size is 798 payload + 2 bytes CRC = 800 bytes (32*25)
|
|
processPacket(notif.getSourceCall(), notif.getDestCall(), notif.getCAN(), packetBytes);
|
|
// test(notif.getSourceCall(), notif.getDestCall());
|
|
return true;
|
|
}
|
|
else if (MsgSendAPRS::match(cmd))
|
|
{
|
|
const MsgSendAPRS& notif = (const MsgSendAPRS&) cmd;
|
|
M17ModAX25 modAX25;
|
|
QString strData;
|
|
|
|
if (notif.getInsertPosition())
|
|
{
|
|
if (m_insertPositionToggle) {
|
|
strData = "!" + formatAPRSPosition();
|
|
} else {
|
|
strData = notif.getData();
|
|
}
|
|
|
|
m_insertPositionToggle = !m_insertPositionToggle;
|
|
}
|
|
else
|
|
{
|
|
strData = notif.getData();
|
|
}
|
|
|
|
QByteArray packetBytes = modAX25.makePacket(notif.getCall(), notif.getTo(), notif.getVia(), strData);
|
|
packetBytes.prepend(0x02); // APRS standard type
|
|
packetBytes.truncate(798); // Maximum packet size is 798 payload + 2 bytes CRC = 800 bytes (32*25)
|
|
processPacket(notif.getSourceCall(), notif.getDestCall(), notif.getCAN(), packetBytes);
|
|
return true;
|
|
}
|
|
else if (MsgSendAudioFrame::match(cmd))
|
|
{
|
|
MsgSendAudioFrame& notif = (MsgSendAudioFrame&) cmd;
|
|
m_audioFrame = notif.getAudioFrame();
|
|
processAudioFrame();
|
|
return true;
|
|
}
|
|
else if (MsgStartAudio::match(cmd))
|
|
{
|
|
MsgStartAudio& notif = (MsgStartAudio&) cmd;
|
|
qDebug("M17ModProcessor::handleMessage: MsgStartAudio: %s to %s",
|
|
qPrintable(notif.getSourceCall()), qPrintable(notif.getDestCall()));
|
|
audioStart(notif.getSourceCall(), notif.getDestCall(), notif.getCAN());
|
|
return true;
|
|
}
|
|
else if (MsgStopAudio::match(cmd))
|
|
{
|
|
qDebug("M17ModProcessor::handleMessage: MsgStopAudio");
|
|
audioStop();
|
|
return true;
|
|
}
|
|
else if (MsgStartBERT::match(cmd))
|
|
{
|
|
qDebug("M17ModProcessor::handleMessage: MsgStartBERT");
|
|
m_prbs.reset();
|
|
send_preamble(); // preamble
|
|
return true;
|
|
}
|
|
else if (MsgSendBERTFrame::match(cmd))
|
|
{
|
|
processBERTFrame();
|
|
return true;
|
|
}
|
|
else if (MsgStopBERT::match(cmd))
|
|
{
|
|
qDebug("M17ModProcessor::handleMessage: MsgStopBERT");
|
|
send_eot(); // EOT
|
|
return true;
|
|
}
|
|
else if (MsgSetGNSS::match(cmd))
|
|
{
|
|
qDebug("M17ModProcessor::handleMessage: MsgSetGNSS");
|
|
MsgSetGNSS& notif = (MsgSetGNSS&) cmd;
|
|
m_m17Modulator.set_gnss(notif.getLat(), notif.getLon(), notif.getAlt());
|
|
return true;
|
|
}
|
|
else if (MsgStopGNSS::match(cmd))
|
|
{
|
|
qDebug("M17ModProcessor::handleMessage: MsgStopGNSS");
|
|
m_m17Modulator.reset_gnss();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
void M17ModProcessor::handleInputMessages()
|
|
{
|
|
Message* message;
|
|
|
|
while ((message = m_inputMessageQueue.pop()) != nullptr)
|
|
{
|
|
if (handleMessage(*message)) {
|
|
delete message;
|
|
}
|
|
}
|
|
}
|
|
|
|
void M17ModProcessor::test(const QString& sourceCall, const QString& destCall)
|
|
{
|
|
m_m17Modulator.source(sourceCall.toStdString());
|
|
m_m17Modulator.dest(destCall.toStdString());
|
|
|
|
for (int i = 0; i < 25; i++) {
|
|
send_preamble();
|
|
}
|
|
}
|
|
|
|
void M17ModProcessor::processPacket(const QString& sourceCall, const QString& destCall, uint8_t can, const QByteArray& packetBytes)
|
|
{
|
|
qDebug("M17ModProcessor::processPacket: %s to %s: %s", qPrintable(sourceCall), qPrintable(destCall), qPrintable(packetBytes));
|
|
m_m17Modulator.source(sourceCall.toStdString());
|
|
m_m17Modulator.dest(destCall.toStdString());
|
|
m_m17Modulator.can(can);
|
|
|
|
send_preamble(); // preamble
|
|
|
|
// LSF
|
|
std::array<uint8_t, 30> lsf;
|
|
std::array<int8_t, 368> lsf_frame = m_m17Modulator.make_lsf(lsf);
|
|
output_baseband(modemm17::M17Modulator::LSF_SYNC_WORD, lsf_frame);
|
|
|
|
// Packets
|
|
int remainderCount = packetBytes.size();
|
|
int packetCount = 0;
|
|
std::array<int8_t, 368> packet_frame;
|
|
// std::copy(modemm17::M17Modulator::DATA_SYNC_WORD.begin(), modemm17::M17Modulator::DATA_SYNC_WORD.end(), fullframe_symbols.begin());
|
|
modemm17::M17Modulator::packet_t packet;
|
|
|
|
while (remainderCount > 25)
|
|
{
|
|
std::copy(packetBytes.begin() + (packetCount*25), packetBytes.begin() + ((packetCount+1)*25), packet.begin());
|
|
packet_frame = m_m17Modulator.make_packet_frame(packetCount, 25, false, packet);
|
|
output_baseband(modemm17::M17Modulator::PACKET_SYNC_WORD, packet_frame);
|
|
remainderCount -= 25;
|
|
packetCount++;
|
|
}
|
|
|
|
std::copy(packetBytes.begin() + (packetCount*25), packetBytes.begin() + (packetCount*25) + remainderCount, packet.begin());
|
|
packet_frame = m_m17Modulator.make_packet_frame(packetCount, remainderCount, true, packet);
|
|
output_baseband(modemm17::M17Modulator::PACKET_SYNC_WORD, packet_frame);
|
|
qDebug("M17ModProcessor::processPacket: last: packetCount: %d remainderCount: %d", packetCount, remainderCount);
|
|
|
|
send_eot(); // EOT
|
|
}
|
|
|
|
void M17ModProcessor::audioStart(const QString& sourceCall, const QString& destCall, uint8_t can)
|
|
{
|
|
qDebug("M17ModProcessor::audioStart");
|
|
m_m17Modulator.source(sourceCall.toStdString());
|
|
m_m17Modulator.dest(destCall.toStdString());
|
|
m_m17Modulator.can(can);
|
|
m_audioFrameNumber = 0;
|
|
|
|
send_preamble(); // preamble
|
|
|
|
// LSF
|
|
std::array<uint8_t, 30> lsf;
|
|
std::array<int8_t, 368> lsf_frame = m_m17Modulator.make_lsf(lsf, true);
|
|
output_baseband(modemm17::M17Modulator::LSF_SYNC_WORD, lsf_frame);
|
|
|
|
// Prepare LICH
|
|
for (size_t i = 0; i < m_lich.size(); ++i)
|
|
{
|
|
std::array<uint8_t, 5> segment;
|
|
std::copy(lsf.begin() + i*5, lsf.begin() + (i + 1)*5, segment.begin());
|
|
modemm17::M17Modulator::lich_segment_t lich_segment = modemm17::M17Modulator::make_lich_segment(segment, i);
|
|
std::copy(lich_segment.begin(), lich_segment.end(), m_lich[i].begin());
|
|
}
|
|
}
|
|
|
|
void M17ModProcessor::audioStop()
|
|
{
|
|
qDebug("M17ModProcessor::audioStop");
|
|
if (m_audioFrameIndex > 0) // send remainder audio + null samples
|
|
{
|
|
std::fill(m_audioFrame.begin() + m_audioFrameIndex, m_audioFrame.end(), 0);
|
|
processAudioFrame();
|
|
m_audioFrameIndex = 0;
|
|
}
|
|
|
|
send_eot(); // EOT
|
|
}
|
|
|
|
void M17ModProcessor::send_preamble()
|
|
{
|
|
// Preamble is simple... bytes -> symbols -> baseband.
|
|
std::array<uint8_t, 48> preamble_bytes;
|
|
preamble_bytes.fill(0x77);
|
|
std::array<int8_t, 192> preamble_symbols = modemm17::M17Modulator::bytes_to_symbols(preamble_bytes);
|
|
std::array<int16_t, 1920> preamble_baseband = m_m17Modulator.symbols_to_baseband(preamble_symbols);
|
|
m_basebandFifo.write(preamble_baseband.data(), 1920);
|
|
}
|
|
|
|
void M17ModProcessor::processAudioFrame()
|
|
{
|
|
std::array<uint8_t, 16> audioPayload = encodeAudio(m_audioFrame);
|
|
std::array<int8_t, 272> audioDataBits = modemm17::M17Modulator::make_stream_data_frame(m_audioFrameNumber++, audioPayload);
|
|
|
|
if (m_audioFrameNumber == 0x8000) {
|
|
m_audioFrameNumber = 0;
|
|
}
|
|
|
|
std::array<uint8_t, 96>& lich = m_lich[m_lichSegmentIndex++];
|
|
|
|
if (m_lichSegmentIndex == 6) {
|
|
m_lichSegmentIndex = 0;
|
|
}
|
|
|
|
std::array<int8_t, 368> temp;
|
|
auto it = std::copy(lich.begin(), lich.end(), temp.begin());
|
|
std::copy(audioDataBits.begin(), audioDataBits.end(), it);
|
|
modemm17::M17Modulator::interleave_and_randomize(temp);
|
|
|
|
output_baseband(modemm17::M17Modulator::STREAM_SYNC_WORD, temp);
|
|
}
|
|
|
|
void M17ModProcessor::processBERTFrame()
|
|
{
|
|
std::array<int8_t, 368> temp = modemm17::M17Modulator::make_bert_frame(m_prbs);
|
|
modemm17::M17Modulator::interleave_and_randomize(temp);
|
|
output_baseband(modemm17::M17Modulator::BERT_SYNC_WORD, temp);
|
|
}
|
|
|
|
std::array<uint8_t, 16> M17ModProcessor::encodeAudio(std::array<int16_t, 320*6>& audioFrame)
|
|
{
|
|
std::array<int16_t, 320> audioFrame8k;
|
|
m_decimator.decimate(audioFrame.data(), audioFrame8k.data(), 320);
|
|
std::array<uint8_t, 16> result;
|
|
codec2_encode(m_codec2, &result[0], const_cast<int16_t*>(&audioFrame8k[0]));
|
|
codec2_encode(m_codec2, &result[8], const_cast<int16_t*>(&audioFrame8k[160]));
|
|
return result;
|
|
}
|
|
|
|
void M17ModProcessor::send_eot()
|
|
{
|
|
std::array<uint8_t, 2> EOT_SYNC = { 0x55, 0x5D };
|
|
std::array<uint8_t, 48> eot_bytes;
|
|
|
|
for (unsigned int i = 0; i < eot_bytes.size(); i += 2) {
|
|
std::copy(EOT_SYNC.begin(), EOT_SYNC.end(), eot_bytes.begin() + i);
|
|
}
|
|
|
|
std::array<int8_t, 192> eot_symbols = modemm17::M17Modulator::bytes_to_symbols(eot_bytes);
|
|
std::array<int16_t, 1920> eot_baseband = m_m17Modulator.symbols_to_baseband(eot_symbols);
|
|
m_basebandFifo.write(eot_baseband.data(), 1920);
|
|
}
|
|
|
|
void M17ModProcessor::output_baseband(std::array<uint8_t, 2> sync_word, const std::array<int8_t, 368>& frame)
|
|
{
|
|
std::array<int8_t, 184> symbols = modemm17::M17Modulator::bits_to_symbols(frame); // 368 bits -> 184 dibit symbols
|
|
std::array<int8_t, 8> sw = modemm17::M17Modulator::bytes_to_symbols(sync_word); // 16 bits -> 8 dibit symbols
|
|
|
|
std::array<int8_t, 192> temp; // 384 = 368 + 16 bits -> 192 dibit symbols
|
|
auto fit = std::copy(sw.begin(), sw.end(), temp.begin()); // start with sync word dibits
|
|
std::copy(symbols.begin(), symbols.end(), fit); // then the frame dibits
|
|
std::array<int16_t, 1920> baseband = m_m17Modulator.symbols_to_baseband(temp); // 1920 48 kS/s int16_t samples
|
|
m_basebandFifo.write(baseband.data(), 1920);
|
|
}
|
|
|
|
QString M17ModProcessor::formatAPRSPosition()
|
|
{
|
|
float latitude = MainCore::instance()->getSettings().getLatitude();
|
|
float longitude = MainCore::instance()->getSettings().getLongitude();
|
|
|
|
int latDeg, latMin, latFrac, latNorth;
|
|
int longDeg, longMin, longFrac, longEast;
|
|
|
|
// Convert decimal latitude to degrees, min and hundreths of a minute
|
|
latNorth = latitude >= 0.0f;
|
|
latitude = abs(latitude);
|
|
latDeg = (int) latitude;
|
|
latitude -= (float) latDeg;
|
|
latitude *= 60.0f;
|
|
latMin = (int) latitude;
|
|
latitude -= (float) latMin;
|
|
latitude *= 100.0f;
|
|
latFrac = round(latitude);
|
|
|
|
// Convert decimal longitude
|
|
longEast = longitude >= 0.0f;
|
|
longitude = abs(longitude);
|
|
longDeg = (int) longitude;
|
|
longitude -= (float) longDeg;
|
|
longitude *= 60.0f;
|
|
longMin = (int) longitude;
|
|
longitude -= (float) longMin;
|
|
longitude *= 100.0f;
|
|
longFrac = round(longitude);
|
|
|
|
// Insert position with house symbol (-) in to data field
|
|
QString latStr = QString("%1%2.%3%4")
|
|
.arg(latDeg, 2, 10, QChar('0'))
|
|
.arg(latMin, 2, 10, QChar('0'))
|
|
.arg(latFrac, 2, 10, QChar('0'))
|
|
.arg(latNorth ? 'N' : 'S');
|
|
QString longStr = QString("%1%2.%3%4")
|
|
.arg(longDeg, 3, 10, QChar('0'))
|
|
.arg(longMin, 2, 10, QChar('0'))
|
|
.arg(longFrac, 2, 10, QChar('0'))
|
|
.arg(longEast ? 'E' : 'W');
|
|
return QString("%1/%2-").arg(latStr).arg(longStr);
|
|
}
|