sdrangel/plugins/channelrx/demodais/aisdemodbaseband.cpp

177 wiersze
5.8 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
// Copyright (C) 2021 Jon Beniston, M7RCE //
// //
// 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 <QDebug>
#include "dsp/dspengine.h"
#include "dsp/dspcommands.h"
#include "dsp/downchannelizer.h"
#include "aisdemodbaseband.h"
MESSAGE_CLASS_DEFINITION(AISDemodBaseband::MsgConfigureAISDemodBaseband, Message)
AISDemodBaseband::AISDemodBaseband(AISDemod *aisDemod) :
m_sink(aisDemod),
m_running(false),
m_mutex(QMutex::Recursive)
{
qDebug("AISDemodBaseband::AISDemodBaseband");
m_sink.setScopeSink(&m_scopeSink);
m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(48000));
m_channelizer = new DownChannelizer(&m_sink);
}
AISDemodBaseband::~AISDemodBaseband()
{
m_inputMessageQueue.clear();
delete m_channelizer;
}
void AISDemodBaseband::reset()
{
QMutexLocker mutexLocker(&m_mutex);
m_inputMessageQueue.clear();
m_sampleFifo.reset();
}
void AISDemodBaseband::startWork()
{
QMutexLocker mutexLocker(&m_mutex);
QObject::connect(
&m_sampleFifo,
&SampleSinkFifo::dataReady,
this,
&AISDemodBaseband::handleData,
Qt::QueuedConnection
);
connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
m_running = true;
}
void AISDemodBaseband::stopWork()
{
QMutexLocker mutexLocker(&m_mutex);
disconnect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
QObject::disconnect(
&m_sampleFifo,
&SampleSinkFifo::dataReady,
this,
&AISDemodBaseband::handleData
);
m_running = false;
}
void AISDemodBaseband::setChannel(ChannelAPI *channel)
{
m_sink.setChannel(channel);
}
void AISDemodBaseband::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
{
m_sampleFifo.write(begin, end);
}
void AISDemodBaseband::handleData()
{
QMutexLocker mutexLocker(&m_mutex);
while ((m_sampleFifo.fill() > 0) && (m_inputMessageQueue.size() == 0))
{
SampleVector::iterator part1begin;
SampleVector::iterator part1end;
SampleVector::iterator part2begin;
SampleVector::iterator part2end;
std::size_t count = m_sampleFifo.readBegin(m_sampleFifo.fill(), &part1begin, &part1end, &part2begin, &part2end);
// first part of FIFO data
if (part1begin != part1end) {
m_channelizer->feed(part1begin, part1end);
}
// second part of FIFO data (used when block wraps around)
if(part2begin != part2end) {
m_channelizer->feed(part2begin, part2end);
}
m_sampleFifo.readCommit((unsigned int) count);
}
}
void AISDemodBaseband::handleInputMessages()
{
Message* message;
while ((message = m_inputMessageQueue.pop()) != nullptr)
{
if (handleMessage(*message)) {
delete message;
}
}
}
bool AISDemodBaseband::handleMessage(const Message& cmd)
{
if (MsgConfigureAISDemodBaseband::match(cmd))
{
QMutexLocker mutexLocker(&m_mutex);
MsgConfigureAISDemodBaseband& cfg = (MsgConfigureAISDemodBaseband&) cmd;
qDebug() << "AISDemodBaseband::handleMessage: MsgConfigureAISDemodBaseband";
applySettings(cfg.getSettings(), cfg.getForce());
return true;
}
else if (DSPSignalNotification::match(cmd))
{
QMutexLocker mutexLocker(&m_mutex);
DSPSignalNotification& notif = (DSPSignalNotification&) cmd;
qDebug() << "AISDemodBaseband::handleMessage: DSPSignalNotification: basebandSampleRate: " << notif.getSampleRate();
setBasebandSampleRate(notif.getSampleRate());
m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(notif.getSampleRate()));
return true;
}
else
{
return false;
}
}
void AISDemodBaseband::applySettings(const AISDemodSettings& settings, bool force)
{
if ((settings.m_inputFrequencyOffset != m_settings.m_inputFrequencyOffset) || force)
{
m_channelizer->setChannelization(AISDemodSettings::AISDEMOD_CHANNEL_SAMPLE_RATE, settings.m_inputFrequencyOffset);
m_sink.applyChannelSettings(m_channelizer->getChannelSampleRate(), m_channelizer->getChannelFrequencyOffset());
}
m_sink.applySettings(settings, force);
m_settings = settings;
}
void AISDemodBaseband::setBasebandSampleRate(int sampleRate)
{
m_channelizer->setBasebandSampleRate(sampleRate);
m_sink.applyChannelSettings(m_channelizer->getChannelSampleRate(), m_channelizer->getChannelFrequencyOffset());
}