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SSB Demodulation.

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This commit is contained in:
Hexameron 2014-05-21 18:31:14 +01:00
parent 1361e55f47
commit c5fc860be9
9 changed files with 761 additions and 0 deletions
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1
plugins/channel/CMakeLists.txt
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@ -2,4 +2,5 @@ project(demod)
add_subdirectory(nfm)
add_subdirectory(tcpsrc)
add_subdirectory(ssb)
#add_subdirectory(tetra)

47
plugins/channel/ssb/CMakeLists.txt Normal file
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@ -0,0 +1,47 @@
project(ssb)
set(ssb_SOURCES
ssbdemod.cpp
ssbdemodgui.cpp
ssbplugin.cpp
)
set(ssb_HEADERS
ssbdemod.h
ssbdemodgui.h
ssbplugin.h
)
set(ssb_FORMS
ssbdemodgui.ui
)
include_directories(
.
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_SOURCE_DIR}/include
${CMAKE_SOURCE_DIR}/include-gpl
${OPENGL_INCLUDE_DIR}
)
#include(${QT_USE_FILE})
add_definitions(${QT_DEFINITIONS})
add_definitions(-DQT_PLUGIN)
add_definitions(-DQT_SHARED)
#qt5_wrap_cpp(ssb_HEADERS_MOC ${ssb_HEADERS})
qt5_wrap_ui(ssb_FORMS_HEADERS ${ssb_FORMS})
add_library(demodssb SHARED
${ssb_SOURCES}
${ssb_HEADERS_MOC}
${ssb_FORMS_HEADERS}
)
target_link_libraries(demodssb
${QT_LIBRARIES}
${OPENGL_LIBRARIES}
sdrbase
)
qt5_use_modules(demodssb Core Widgets OpenGL Multimedia)

126
plugins/channel/ssb/ssbdemod.cpp Normal file
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@ -0,0 +1,126 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// (c) 2014 Modified by John Greb
// //
// 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 //
// //
// 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 <QTime>
#include <stdio.h>
#include "ssbdemod.h"
#include "audio/audiooutput.h"
#include "dsp/dspcommands.h"
MESSAGE_CLASS_DEFINITION(SSBDemod::MsgConfigureSSBDemod, Message)
SSBDemod::SSBDemod(AudioFifo* audioFifo, SampleSink* sampleSink) :
m_sampleSink(sampleSink),
m_audioFifo(audioFifo)
{
m_Bandwidth = 10000;
m_volume = 2.0;
m_sampleRate = 96000;
m_frequency = 0;
m_nco.setFreq(m_frequency, m_sampleRate);
m_interpolator.create(16, m_sampleRate, 10000);
m_sampleDistanceRemain = (Real)m_sampleRate / 48000.0;
m_lowpass.create(21, 48000, 10000);
m_audioBuffer.resize(256);
m_audioBufferFill = 0;
}
SSBDemod::~SSBDemod()
{
}
void SSBDemod::configure(MessageQueue* messageQueue, Real Bandwidth, Real volume)
{
Message* cmd = MsgConfigureSSBDemod::create(Bandwidth, volume);
cmd->submit(messageQueue, this);
}
void SSBDemod::feed(SampleVector::const_iterator begin, SampleVector::const_iterator end, bool firstOfBurst)
{
Complex ci;
bool consumed;
for(SampleVector::const_iterator it = begin; it < end; ++it) {
Complex c(it->real() / 32768.0, it->imag() / 32768.0);
c *= m_nco.nextIQ();
consumed = false;
// could squelch audio if RTL_SDR samplerate is not being fully decimated.
if(m_interpolator.interpolate(&m_sampleDistanceRemain, c, &consumed, &ci)) {
Real demod = ci.imag() + ci.real();
demod = m_lowpass.filter(demod * 0.5);
m_sampleBuffer.push_back(Sample(demod * 32768.0, demod * 32768.0));
demod *= m_volume;
qint16 sample = demod * 16384;
m_audioBuffer[m_audioBufferFill].l = sample;
m_audioBuffer[m_audioBufferFill].r = sample;
++m_audioBufferFill;
if(m_audioBufferFill >= m_audioBuffer.size()) {
uint res = m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 1);
m_audioBufferFill = 0;
}
m_sampleDistanceRemain += (Real)m_sampleRate / 48000.0;
}
}
if(m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
;//qDebug("lost samples");
m_audioBufferFill = 0;
if(m_sampleSink != NULL)
m_sampleSink->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), firstOfBurst);
m_sampleBuffer.clear();
}
void SSBDemod::start()
{
}
void SSBDemod::stop()
{
}
bool SSBDemod::handleMessage(Message* cmd)
{
if(DSPSignalNotification::match(cmd)) {
DSPSignalNotification* signal = (DSPSignalNotification*)cmd;
qDebug("%d samples/sec, %lld Hz offset", signal->getSampleRate(), signal->getFrequencyOffset());
m_sampleRate = signal->getSampleRate();
m_nco.setFreq(-signal->getFrequencyOffset(), m_sampleRate);
m_interpolator.create(16, m_sampleRate, m_Bandwidth);
m_sampleDistanceRemain = m_sampleRate / 48000.0;
cmd->completed();
return true;
} else if(MsgConfigureSSBDemod::match(cmd)) {
MsgConfigureSSBDemod* cfg = (MsgConfigureSSBDemod*)cmd;
m_Bandwidth = cfg->getBandwidth();
m_interpolator.create(16, m_sampleRate, m_Bandwidth);
m_lowpass.create(21, 48000, cfg->getBandwidth());
m_volume = cfg->getVolume();
m_volume *= m_volume * 0.1;
cmd->completed();
return true;
} else {
if(m_sampleSink != NULL)
return m_sampleSink->handleMessage(cmd);
else return false;
}
}

91
plugins/channel/ssb/ssbdemod.h Normal file
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@ -0,0 +1,91 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// 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 //
// //
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_SSBDEMOD_H
#define INCLUDE_SSBDEMOD_H
#include <vector>
#include "dsp/samplesink.h"
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/lowpass.h"
#include "audio/audiofifo.h"
#include "util/message.h"
class AudioFifo;
class SSBDemod : public SampleSink {
public:
SSBDemod(AudioFifo* audioFifo, SampleSink* sampleSink);
~SSBDemod();
void configure(MessageQueue* messageQueue, Real Bandwidth, Real volume);
void feed(SampleVector::const_iterator begin, SampleVector::const_iterator end, bool firstOfBurst);
void start();
void stop();
bool handleMessage(Message* cmd);
private:
class MsgConfigureSSBDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
Real getBandwidth() const { return m_Bandwidth; }
Real getVolume() const { return m_volume; }
static MsgConfigureSSBDemod* create(Real Bandwidth, Real volume)
{
return new MsgConfigureSSBDemod(Bandwidth, volume);
}
private:
Real m_Bandwidth;
Real m_volume;
MsgConfigureSSBDemod(Real Bandwidth, Real volume) :
Message(),
m_Bandwidth(Bandwidth),
m_volume(volume)
{ }
};
struct AudioSample {
qint16 l;
qint16 r;
};
typedef std::vector<AudioSample> AudioVector;
Real m_Bandwidth;
Real m_volume;
int m_sampleRate;
int m_frequency;
NCO m_nco;
Interpolator m_interpolator;
Real m_sampleDistanceRemain;
Lowpass<Real> m_lowpass;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo* m_audioFifo;
SampleSink* m_sampleSink;
SampleVector m_sampleBuffer;
};
#endif // INCLUDE_SSBDEMOD_H

182
plugins/channel/ssb/ssbdemodgui.cpp Normal file
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@ -0,0 +1,182 @@
#include <QDockWidget>
#include <QMainWindow>
#include "ssbdemodgui.h"
#include "ui_ssbdemodgui.h"
#include "ssbdemodgui.h"
#include "ui_ssbdemodgui.h"
#include "dsp/threadedsamplesink.h"
#include "dsp/channelizer.h"
#include "ssbdemod.h"
#include "dsp/spectrumvis.h"
#include "gui/glspectrum.h"
#include "plugin/pluginapi.h"
#include "util/simpleserializer.h"
#include "gui/basicchannelsettingswidget.h"
SSBDemodGUI* SSBDemodGUI::create(PluginAPI* pluginAPI)
{
SSBDemodGUI* gui = new SSBDemodGUI(pluginAPI);
return gui;
}
void SSBDemodGUI::destroy()
{
delete this;
}
void SSBDemodGUI::setName(const QString& name)
{
setObjectName(name);
}
void SSBDemodGUI::resetToDefaults()
{
ui->BW->setValue(3);
ui->volume->setValue(4);
applySettings();
}
QByteArray SSBDemodGUI::serialize() const
{
SimpleSerializer s(1);
s.writeS32(1, m_channelMarker->getCenterFrequency());
s.writeS32(2, ui->BW->value());
s.writeS32(3, ui->volume->value());
s.writeBlob(4, ui->spectrumGUI->serialize());
s.writeU32(5, m_channelMarker->getColor().rgb());
return s.final();
}
bool SSBDemodGUI::deserialize(const QByteArray& data)
{
SimpleDeserializer d(data);
if(!d.isValid()) {
resetToDefaults();
return false;
}
if(d.getVersion() == 1) {
QByteArray bytetmp;
quint32 u32tmp;
qint32 tmp;
d.readS32(1, &tmp, 0);
m_channelMarker->setCenterFrequency(tmp);
d.readS32(2, &tmp, 3);
ui->BW->setValue(tmp);
d.readS32(3, &tmp, 20);
ui->volume->setValue(tmp);
d.readBlob(4, &bytetmp);
ui->spectrumGUI->deserialize(bytetmp);
if(d.readU32(5, &u32tmp))
m_channelMarker->setColor(u32tmp);
applySettings();
return true;
} else {
resetToDefaults();
return false;
}
}
bool SSBDemodGUI::handleMessage(Message* message)
{
return false;
}
void SSBDemodGUI::viewChanged()
{
applySettings();
}
void SSBDemodGUI::on_BW_valueChanged(int value)
{
ui->BWText->setText(QString("%1 kHz").arg(value));
m_channelMarker->setBandwidth(value * 1000);
applySettings();
}
void SSBDemodGUI::on_volume_valueChanged(int value)
{
ui->volumeText->setText(QString("%1").arg(value / 10.0, 0, 'f', 1));
applySettings();
}
void SSBDemodGUI::onWidgetRolled(QWidget* widget, bool rollDown)
{
/*
if((widget == ui->spectrumContainer) && (m_ssbDemod != NULL))
m_ssbDemod->setSpectrum(m_threadedSampleSink->getMessageQueue(), rollDown);
*/
}
void SSBDemodGUI::onMenuDoubleClicked()
{
if(!m_basicSettingsShown) {
m_basicSettingsShown = true;
BasicChannelSettingsWidget* bcsw = new BasicChannelSettingsWidget(m_channelMarker, this);
bcsw->show();
}
}
SSBDemodGUI::SSBDemodGUI(PluginAPI* pluginAPI, QWidget* parent) :
RollupWidget(parent),
ui(new Ui::SSBDemodGUI),
m_pluginAPI(pluginAPI),
m_basicSettingsShown(false)
{
ui->setupUi(this);
setAttribute(Qt::WA_DeleteOnClose, true);
connect(this, SIGNAL(widgetRolled(QWidget*,bool)), this, SLOT(onWidgetRolled(QWidget*,bool)));
connect(this, SIGNAL(menuDoubleClickEvent()), this, SLOT(onMenuDoubleClicked()));
m_audioFifo = new AudioFifo(4, 48000 / 4);
m_spectrumVis = new SpectrumVis(ui->glSpectrum);
m_ssbDemod = new SSBDemod(m_audioFifo, m_spectrumVis);
m_channelizer = new Channelizer(m_ssbDemod);
m_threadedSampleSink = new ThreadedSampleSink(m_channelizer);
m_pluginAPI->addAudioSource(m_audioFifo);
m_pluginAPI->addSampleSink(m_threadedSampleSink);
ui->glSpectrum->setCenterFrequency(0);
ui->glSpectrum->setSampleRate(48000);
ui->glSpectrum->setDisplayWaterfall(true);
ui->glSpectrum->setDisplayMaxHold(true);
m_spectrumVis->configure(m_threadedSampleSink->getMessageQueue(), 64, 10, FFTWindow::BlackmanHarris);
m_channelMarker = new ChannelMarker(this);
m_channelMarker->setColor(Qt::red);
m_channelMarker->setBandwidth(4000);
m_channelMarker->setCenterFrequency(0);
m_channelMarker->setVisible(true);
connect(m_channelMarker, SIGNAL(changed()), this, SLOT(viewChanged()));
m_pluginAPI->addChannelMarker(m_channelMarker);
ui->spectrumGUI->setBuddies(m_threadedSampleSink->getMessageQueue(), m_spectrumVis, ui->glSpectrum);
applySettings();
}
SSBDemodGUI::~SSBDemodGUI()
{
m_pluginAPI->removeChannelInstance(this);
m_pluginAPI->removeAudioSource(m_audioFifo);
m_pluginAPI->removeSampleSink(m_threadedSampleSink);
delete m_threadedSampleSink;
delete m_channelizer;
delete m_ssbDemod;
delete m_spectrumVis;
delete m_audioFifo;
delete m_channelMarker;
delete ui;
}
void SSBDemodGUI::applySettings()
{
setTitleColor(m_channelMarker->getColor());
m_channelizer->configure(m_threadedSampleSink->getMessageQueue(),
48000,
m_channelMarker->getCenterFrequency());
m_ssbDemod->configure(m_threadedSampleSink->getMessageQueue(),
ui->BW->value() * 1000.0,
ui->volume->value() / 10.0 );
}

60
plugins/channel/ssb/ssbdemodgui.h Normal file
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@ -0,0 +1,60 @@
#ifndef INCLUDE_SSBDEMODGUI_H
#define INCLUDE_SSBDEMODGUI_H
#include "gui/rollupwidget.h"
#include "plugin/plugingui.h"
class PluginAPI;
class ChannelMarker;
class AudioFifo;
class ThreadedSampleSink;
class Channelizer;
class SSBDemod;
class SpectrumVis;
namespace Ui {
class SSBDemodGUI;
}
class SSBDemodGUI : public RollupWidget, public PluginGUI {
Q_OBJECT
public:
static SSBDemodGUI* create(PluginAPI* pluginAPI);
void destroy();
void setName(const QString& name);
void resetToDefaults();
QByteArray serialize() const;
bool deserialize(const QByteArray& data);
bool handleMessage(Message* message);
private slots:
void viewChanged();
void on_BW_valueChanged(int value);
void on_volume_valueChanged(int value);
void onWidgetRolled(QWidget* widget, bool rollDown);
void onMenuDoubleClicked();
private:
Ui::SSBDemodGUI* ui;
PluginAPI* m_pluginAPI;
ChannelMarker* m_channelMarker;
bool m_basicSettingsShown;
AudioFifo* m_audioFifo;
ThreadedSampleSink* m_threadedSampleSink;
Channelizer* m_channelizer;
SSBDemod* m_ssbDemod;
SpectrumVis* m_spectrumVis;
explicit SSBDemodGUI(PluginAPI* pluginAPI, QWidget* parent = NULL);
~SSBDemodGUI();
void applySettings();
};
#endif // INCLUDE_SSBDEMODGUI_H

172
plugins/channel/ssb/ssbdemodgui.ui Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>SSBDemodGUI</class>
<widget class="RollupWidget" name="SSBDemodGUI">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>302</width>
<height>410</height>
</rect>
</property>
<property name="windowTitle">
<string>SSB Demodulator</string>
</property>
<widget class="QWidget" name="settingsContainer" native="true">
<property name="geometry">
<rect>
<x>35</x>
<y>35</y>
<width>242</width>
<height>96</height>
</rect>
</property>
<property name="windowTitle">
<string>Settings</string>
</property>
<layout class="QGridLayout" name="gridLayout">
<property name="margin">
<number>2</number>
</property>
<property name="spacing">
<number>3</number>
</property>
<item row="0" column="0">
<widget class="QLabel" name="label">
<property name="text">
<string>Bandwidth</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QSlider" name="BW">
<property name="minimum">
<number>1</number>
</property>
<property name="maximum">
<number>20</number>
</property>
<property name="pageStep">
<number>1</number>
</property>
<property name="value">
<number>3</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<item row="0" column="2">
<widget class="QLabel" name="BWText">
<property name="minimumSize">
<size>
<width>50</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>3 kHz</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="1" column="0">
<widget class="QLabel" name="label_2">
<property name="text">
<string>Volume</string>
</property>
</widget>
</item>
<item row="1" column="1">
<widget class="QSlider" name="volume">
<property name="maximum">
<number>100</number>
</property>
<property name="value">
<number>20</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<item row="1" column="2">
<widget class="QLabel" name="volumeText">
<property name="minimumSize">
<size>
<width>50</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>2.0</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QWidget" name="spectrumContainer" native="true">
<property name="geometry">
<rect>
<x>40</x>
<y>140</y>
<width>218</width>
<height>184</height>
</rect>
</property>
<property name="windowTitle">
<string>Channel Spectrum</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout">
<property name="spacing">
<number>2</number>
</property>
<property name="margin">
<number>3</number>
</property>
<item>
<widget class="GLSpectrum" name="glSpectrum" native="true">
<property name="minimumSize">
<size>
<width>200</width>
<height>150</height>
</size>
</property>
</widget>
</item>
<item>
<widget class="GLSpectrumGUI" name="spectrumGUI" native="true"/>
</item>
</layout>
</widget>
</widget>
<customwidgets>
<customwidget>
<class>GLSpectrum</class>
<extends>QWidget</extends>
<header>gui/glspectrum.h</header>
<container>1</container>
</customwidget>
<customwidget>
<class>GLSpectrumGUI</class>
<extends>QWidget</extends>
<header>gui/glspectrumgui.h</header>
<container>1</container>
</customwidget>
<customwidget>
<class>RollupWidget</class>
<extends>QWidget</extends>
<header>gui/rollupwidget.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>

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plugins/channel/ssb/ssbplugin.cpp Normal file
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#include <QtPlugin>
#include <QAction>
#include "plugin/pluginapi.h"
#include "ssbplugin.h"
#include "ssbdemodgui.h"
const PluginDescriptor SSBPlugin::m_pluginDescriptor = {
QString("SSB Demodulator"),
QString("---"),
QString("(c) maintech GmbH (rewritten by John Greb)"),
QString("http://www.maintech.de"),
true,
QString("http://www.maintech.de")
};
SSBPlugin::SSBPlugin(QObject* parent) :
QObject(parent)
{
}
const PluginDescriptor& SSBPlugin::getPluginDescriptor() const
{
return m_pluginDescriptor;
}
void SSBPlugin::initPlugin(PluginAPI* pluginAPI)
{
m_pluginAPI = pluginAPI;
// register demodulator
QAction* action = new QAction(tr("&SSB Demodulator"), this);
connect(action, SIGNAL(triggered()), this, SLOT(createInstanceSSB()));
m_pluginAPI->registerChannel("de.maintech.sdrangelove.channel.ssb", this, action);
}
PluginGUI* SSBPlugin::createChannel(const QString& channelName)
{
if(channelName == "de.maintech.sdrangelove.channel.ssb") {
SSBDemodGUI* gui = SSBDemodGUI::create(m_pluginAPI);
m_pluginAPI->registerChannelInstance("de.maintech.sdrangelove.channel.ssb", gui);
m_pluginAPI->addChannelRollup(gui);
return gui;
} else {
return NULL;
}
}
void SSBPlugin::createInstanceSSB()
{
SSBDemodGUI* gui = SSBDemodGUI::create(m_pluginAPI);
m_pluginAPI->registerChannelInstance("de.maintech.sdrangelove.channel.ssb", gui);
m_pluginAPI->addChannelRollup(gui);
}

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plugins/channel/ssb/ssbplugin.h Normal file
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#ifndef INCLUDE_SSBPLUGIN_H
#define INCLUDE_SSBPLUGIN_H
#include <QObject>
#include "plugin/plugininterface.h"
class SSBPlugin : public QObject, PluginInterface {
Q_OBJECT
Q_INTERFACES(PluginInterface)
Q_PLUGIN_METADATA(IID "de.maintech.sdrangelove.channel.ssb")
public:
explicit SSBPlugin(QObject* parent = NULL);
const PluginDescriptor& getPluginDescriptor() const;
void initPlugin(PluginAPI* pluginAPI);
PluginGUI* createChannel(const QString& channelName);
private:
static const PluginDescriptor m_pluginDescriptor;
PluginAPI* m_pluginAPI;
private slots:
void createInstanceSSB();
};
#endif // INCLUDE_SSBPLUGIN_H