mirror of
https://github.com/f4exb/sdrangel.git
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167 lines
5.6 KiB
C++
167 lines
5.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019 Edouard Griffiths, F4EXB //
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// Copyright (C) 2020 Jon Beniston, M7RCE //
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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 "dsp/dspengine.h"
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#include "dsp/dspcommands.h"
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#include "dsp/downchannelizer.h"
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#include "adsbdemodbaseband.h"
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#include "adsb.h"
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MESSAGE_CLASS_DEFINITION(ADSBDemodBaseband::MsgConfigureADSBDemodBaseband, Message)
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ADSBDemodBaseband::ADSBDemodBaseband()
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{
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m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(8000000));
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m_channelizer = new DownChannelizer(&m_sink);
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qDebug("ADSBDemodBaseband::ADSBDemodBaseband");
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QObject::connect(
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&m_sampleFifo,
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&SampleSinkFifo::dataReady,
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this,
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&ADSBDemodBaseband::handleData,
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Qt::QueuedConnection
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);
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
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}
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ADSBDemodBaseband::~ADSBDemodBaseband()
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{
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delete m_channelizer;
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}
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void ADSBDemodBaseband::reset()
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{
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QMutexLocker mutexLocker(&m_mutex);
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m_sampleFifo.reset();
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}
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void ADSBDemodBaseband::startWork()
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{
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m_sink.startWorker();
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}
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void ADSBDemodBaseband::stopWork()
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{
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m_sink.stopWorker();
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}
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void ADSBDemodBaseband::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
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{
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m_sampleFifo.write(begin, end);
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}
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void ADSBDemodBaseband::handleData()
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{
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QMutexLocker mutexLocker(&m_mutex);
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while ((m_sampleFifo.fill() > 0) && (m_inputMessageQueue.size() == 0))
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{
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SampleVector::iterator part1begin;
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SampleVector::iterator part1end;
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SampleVector::iterator part2begin;
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SampleVector::iterator part2end;
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std::size_t count = m_sampleFifo.readBegin(m_sampleFifo.fill(), &part1begin, &part1end, &part2begin, &part2end);
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// first part of FIFO data
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if (part1begin != part1end) {
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m_channelizer->feed(part1begin, part1end);
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}
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// second part of FIFO data (used when block wraps around)
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if(part2begin != part2end) {
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m_channelizer->feed(part2begin, part2end);
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}
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m_sampleFifo.readCommit((unsigned int) count);
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}
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}
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void ADSBDemodBaseband::handleInputMessages()
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{
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Message* message;
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while ((message = m_inputMessageQueue.pop()) != nullptr)
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{
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if (handleMessage(*message)) {
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delete message;
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}
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}
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}
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bool ADSBDemodBaseband::handleMessage(const Message& cmd)
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{
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if (MsgConfigureADSBDemodBaseband::match(cmd))
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{
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QMutexLocker mutexLocker(&m_mutex);
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MsgConfigureADSBDemodBaseband& cfg = (MsgConfigureADSBDemodBaseband&) cmd;
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qDebug() << "ADSBDemodBaseband::handleMessage: MsgConfigureADSBDemodBaseband";
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applySettings(cfg.getSettings(), cfg.getForce());
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return true;
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}
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else if (DSPSignalNotification::match(cmd))
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{
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QMutexLocker mutexLocker(&m_mutex);
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DSPSignalNotification& notif = (DSPSignalNotification&) cmd;
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qDebug() << "ADSBDemodBaseband::handleMessage: DSPSignalNotification: basebandSampleRate: " << notif.getSampleRate();
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m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(8*notif.getSampleRate())); // Need a large FIFO otherwise we get overflows - revist after better upsampling
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m_channelizer->setBasebandSampleRate(notif.getSampleRate());
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m_sink.applyChannelSettings(m_channelizer->getChannelSampleRate(), m_channelizer->getChannelFrequencyOffset());
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return true;
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}
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else
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{
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return false;
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}
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}
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void ADSBDemodBaseband::applySettings(const ADSBDemodSettings& settings, bool force)
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{
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if ((settings.m_inputFrequencyOffset != m_settings.m_inputFrequencyOffset)
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|| (settings.m_samplesPerBit != m_settings.m_samplesPerBit) || force)
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{
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int requestedRate = ADS_B_BITS_PER_SECOND * settings.m_samplesPerBit;
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m_channelizer->setChannelization(requestedRate, settings.m_inputFrequencyOffset);
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m_sink.applyChannelSettings(m_channelizer->getChannelSampleRate(), m_channelizer->getChannelFrequencyOffset());
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}
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m_sink.applySettings(settings, force);
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m_settings = settings;
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}
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int ADSBDemodBaseband::getChannelSampleRate() const
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{
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return m_channelizer->getChannelSampleRate();
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}
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void ADSBDemodBaseband::setBasebandSampleRate(int sampleRate)
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{
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m_channelizer->setBasebandSampleRate(sampleRate);
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m_sink.applyChannelSettings(m_channelizer->getChannelSampleRate(), m_channelizer->getChannelFrequencyOffset());
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}
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