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sdrangel/plugins/channelrx/demodnfm/nfmdemodbaseband.cpp

197 lines
7.1 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2019 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 <QDebug>
#include "dsp/dspengine.h"
#include "dsp/dspcommands.h"
#include "nfmdemodbaseband.h"
MESSAGE_CLASS_DEFINITION(NFMDemodBaseband::MsgConfigureNFMDemodBaseband, Message)
NFMDemodBaseband::NFMDemodBaseband() :
m_channelizer(&m_sink)
{
m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(48000));
qDebug("NFMDemodBaseband::NFMDemodBaseband");
QObject::connect(
&m_sampleFifo,
&SampleSinkFifo::dataReady,
this,
&NFMDemodBaseband::handleData,
Qt::QueuedConnection
);
DSPEngine::instance()->getAudioDeviceManager()->addAudioSink(m_sink.getAudioFifo(), getInputMessageQueue());
m_sink.applyAudioSampleRate(DSPEngine::instance()->getAudioDeviceManager()->getOutputSampleRate());
m_channelSampleRate = 0;
QObject::connect(
&m_inputMessageQueue,
&MessageQueue::messageEnqueued,
this,
&NFMDemodBaseband::handleInputMessages,
Qt::QueuedConnection
);
}
NFMDemodBaseband::~NFMDemodBaseband()
{
DSPEngine::instance()->getAudioDeviceManager()->removeAudioSink(m_sink.getAudioFifo());
}
void NFMDemodBaseband::reset()
{
QMutexLocker mutexLocker(&m_mutex);
m_sampleFifo.reset();
m_channelSampleRate = 0;
}
void NFMDemodBaseband::setChannel(ChannelAPI *channel)
{
m_sink.setChannel(channel);
}
void NFMDemodBaseband::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
{
m_sampleFifo.write(begin, end);
}
void NFMDemodBaseband::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 NFMDemodBaseband::handleInputMessages()
{
Message* message;
while ((message = m_inputMessageQueue.pop()) != nullptr)
{
if (handleMessage(*message)) {
delete message;
}
}
}
bool NFMDemodBaseband::handleMessage(const Message& cmd)
{
if (MsgConfigureNFMDemodBaseband::match(cmd))
{
QMutexLocker mutexLocker(&m_mutex);
MsgConfigureNFMDemodBaseband& cfg = (MsgConfigureNFMDemodBaseband&) cmd;
qDebug() << "NFMDemodBaseband::handleMessage: MsgConfigureNFMDemodBaseband";
applySettings(cfg.getSettings(), cfg.getForce());
return true;
}
else if (DSPSignalNotification::match(cmd))
{
QMutexLocker mutexLocker(&m_mutex);
DSPSignalNotification& notif = (DSPSignalNotification&) cmd;
qDebug() << "NFMDemodBaseband::handleMessage: DSPSignalNotification: basebandSampleRate: " << notif.getSampleRate();
m_sampleFifo.setSize(SampleSinkFifo::getSizePolicy(notif.getSampleRate()));
m_channelizer.setBasebandSampleRate(notif.getSampleRate());
m_sink.applyChannelSettings(m_channelizer.getChannelSampleRate(), m_channelizer.getChannelFrequencyOffset());
if (m_channelSampleRate != m_channelizer.getChannelSampleRate())
{
m_sink.applyAudioSampleRate(m_sink.getAudioSampleRate()); // reapply when channel sample rate changes
m_channelSampleRate = m_channelizer.getChannelSampleRate();
}
return true;
}
else
{
return false;
}
}
void NFMDemodBaseband::applySettings(const NFMDemodSettings& settings, bool force)
{
if ((settings.m_inputFrequencyOffset != m_settings.m_inputFrequencyOffset) || force)
{
m_channelizer.setChannelization(m_sink.getAudioSampleRate(), settings.m_inputFrequencyOffset);
m_sink.applyChannelSettings(m_channelizer.getChannelSampleRate(), m_channelizer.getChannelFrequencyOffset());
if (m_channelSampleRate != m_channelizer.getChannelSampleRate())
{
m_sink.applyAudioSampleRate(m_sink.getAudioSampleRate()); // reapply when channel sample rate changes
m_channelSampleRate = m_channelizer.getChannelSampleRate();
}
}
if ((settings.m_audioDeviceName != m_settings.m_audioDeviceName) || force)
{
AudioDeviceManager *audioDeviceManager = DSPEngine::instance()->getAudioDeviceManager();
int audioDeviceIndex = audioDeviceManager->getOutputDeviceIndex(settings.m_audioDeviceName);
//qDebug("AMDemod::applySettings: audioDeviceName: %s audioDeviceIndex: %d", qPrintable(settings.m_audioDeviceName), audioDeviceIndex);
audioDeviceManager->removeAudioSink(m_sink.getAudioFifo());
audioDeviceManager->addAudioSink(m_sink.getAudioFifo(), getInputMessageQueue(), audioDeviceIndex);
int audioSampleRate = audioDeviceManager->getOutputSampleRate(audioDeviceIndex);
if (m_sink.getAudioSampleRate() != audioSampleRate)
{
m_channelizer.setChannelization(audioSampleRate, settings.m_inputFrequencyOffset);
m_sink.applyChannelSettings(m_channelizer.getChannelSampleRate(), m_channelizer.getChannelFrequencyOffset());
m_sink.applyAudioSampleRate(audioSampleRate);
}
}
m_sink.applySettings(settings, force);
m_settings = settings;
}
int NFMDemodBaseband::getChannelSampleRate() const
{
return m_channelizer.getChannelSampleRate();
}
void NFMDemodBaseband::setBasebandSampleRate(int sampleRate)
{
m_channelizer.setBasebandSampleRate(sampleRate);
m_sink.applyChannelSettings(m_channelizer.getChannelSampleRate(), m_channelizer.getChannelFrequencyOffset());
}