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FCD template.

This commit is contained in:
John Greb 2014-11-29 18:09:35 +00:00
parent fbae7c7f8e
commit beda489261
12 changed files with 917 additions and 0 deletions
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4
plugins/samplesource/CMakeLists.txt
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@ -17,6 +17,10 @@ else()
find_package(LibRTLSDR)
endif()
if(LIBUSB_FOUND AND UNIX)
add_subdirectory(fcd)
endif()
if(LIBUSB_FOUND AND LIBRTLSDR_FOUND)
add_subdirectory(rtlsdr)
endif(LIBUSB_FOUND AND LIBRTLSDR_FOUND)

49
plugins/samplesource/fcd/CMakeLists.txt Normal file
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@ -0,0 +1,49 @@
project(fcd)
set(fcd_SOURCES
fcdgui.cpp
fcdinput.cpp
fcdplugin.cpp
fcdthread.cpp
fcdsource.cpp
)
set(rtlsdr_HEADERS
fcdgui.h
fcdinput.h
fcdplugin.h
fcdthread.h
fcdsource.h
)
set(fcd_FORMS
fcdgui.ui
)
include_directories(
.
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_SOURCE_DIR}/include
${CMAKE_SOURCE_DIR}/include-gpl
)
#include(${QT_USE_FILE})
add_definitions(${QT_DEFINITIONS})
add_definitions(-DQT_PLUGIN)
add_definitions(-DQT_SHARED)
#qt4_wrap_cpp(fcd_HEADERS_MOC ${fcd_HEADERS})
qt5_wrap_ui(fcd_FORMS_HEADERS ${fcd_FORMS})
add_library(inputfcd SHARED
${fcd_SOURCES}
${fcd_HEADERS_MOC}
${fcd_FORMS_HEADERS}
)
target_link_libraries(inputfcd
${QT_LIBRARIES}
sdrbase
)
qt5_use_modules(inputfcd Core Widgets OpenGL Multimedia)

137
plugins/samplesource/fcd/fcdgui.cpp Normal file
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@ -0,0 +1,137 @@
#include "fcdgui.h"
#include "ui_fcdgui.h"
#include "plugin/pluginapi.h"
FCDGui::FCDGui(PluginAPI* pluginAPI, QWidget* parent) :
QWidget(parent),
ui(new Ui::FCDGui),
m_pluginAPI(pluginAPI),
m_settings(),
m_sampleSource(NULL)
{
ui->setupUi(this);
ui->centerFrequency->setValueRange(7, 420000U, 1900000U);
connect(&m_updateTimer, SIGNAL(timeout()), this, SLOT(updateHardware()));
displaySettings();
m_sampleSource = new FCDInput(m_pluginAPI->getMainWindowMessageQueue());
m_pluginAPI->setSampleSource(m_sampleSource);
}
FCDGui::~FCDGui()
{
delete ui;
}
void FCDGui::destroy()
{
delete this;
}
void FCDGui::setName(const QString& name)
{
setObjectName(name);
}
void FCDGui::resetToDefaults()
{
m_generalSettings.resetToDefaults();
m_settings.resetToDefaults();
displaySettings();
sendSettings();
}
QByteArray FCDGui::serializeGeneral() const
{
return m_generalSettings.serialize();
}
bool FCDGui::deserializeGeneral(const QByteArray&data)
{
if(m_generalSettings.deserialize(data)) {
displaySettings();
sendSettings();
return true;
} else {
resetToDefaults();
return false;
}
}
quint64 FCDGui::getCenterFrequency() const
{
return m_generalSettings.m_centerFrequency;
}
QByteArray FCDGui::serialize() const
{
return m_settings.serialize();
}
bool FCDGui::deserialize(const QByteArray& data)
{
if(m_settings.deserialize(data)) {
displaySettings();
sendSettings();
return true;
} else {
resetToDefaults();
return false;
}
}
bool FCDGui::handleMessage(Message* message)
{
return true;
}
void FCDGui::displaySettings()
{
ui->centerFrequency->setValue(m_generalSettings.m_centerFrequency / 1000);
}
void FCDGui::sendSettings()
{
if(!m_updateTimer.isActive())
m_updateTimer.start(100);
}
void FCDGui::on_centerFrequency_changed(quint64 value)
{
m_generalSettings.m_centerFrequency = value * 1000;
sendSettings();
}
#if 0
void FCDGui::on_gain_valueChanged(int value)
{
if(value > (int)m_gains.size())
return;
int gain = m_gains[value];
ui->gainText->setText(tr("%1.%2").arg(gain / 10).arg(abs(gain % 10)));
m_settings.m_gain = gain;
sendSettings();
}
#endif
void FCDGui::updateHardware()
{
FCDInput::MsgConfigureFCD* message = FCDInput::MsgConfigureFCD::create(m_generalSettings, m_settings);
message->submit(m_pluginAPI->getDSPEngineMessageQueue());
m_updateTimer.stop();
}
void FCDGui::on_checkBox_stateChanged(int state) {
if (state == Qt::Checked){
ui->centerFrequency->setValueRange(7, 150U, 240000U);
ui->centerFrequency->setValue(7000);
m_generalSettings.m_centerFrequency = 7000 * 1000;
}
else {
ui->centerFrequency->setValueRange(7, 420000U, 1900000U);
ui->centerFrequency->setValue(434450);
m_generalSettings.m_centerFrequency = 434450 * 1000;
}
sendSettings();
}

53
plugins/samplesource/fcd/fcdgui.h Normal file
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@ -0,0 +1,53 @@
#ifndef INCLUDE_FCDGUI_H
#define INCLUDE_FCDGUI_H
#include <QTimer>
#include "plugin/plugingui.h"
#include "fcdinput.h"
class PluginAPI;
namespace Ui {
class FCDGui;
}
class FCDGui : public QWidget, public PluginGUI {
Q_OBJECT
public:
explicit FCDGui(PluginAPI* pluginAPI, QWidget* parent = NULL);
~FCDGui();
void destroy();
void setName(const QString& name);
void resetToDefaults();
QByteArray serializeGeneral() const;
bool deserializeGeneral(const QByteArray&data);
quint64 getCenterFrequency() const;
QByteArray serialize() const;
bool deserialize(const QByteArray& data);
bool handleMessage(Message* message);
private:
Ui::FCDGui* ui;
PluginAPI* m_pluginAPI;
SampleSource::GeneralSettings m_generalSettings;
FCDInput::Settings m_settings;
QTimer m_updateTimer;
std::vector<int> m_gains;
SampleSource* m_sampleSource;
void displaySettings();
void sendSettings();
private slots:
void on_centerFrequency_changed(quint64 value);
//void on_gain_valueChanged(int value);
//void on_samplerate_valueChanged(int value);
void on_checkBox_stateChanged(int state);
void updateHardware();
};
#endif // INCLUDE_FCDGUI_H

260
plugins/samplesource/fcd/fcdgui.ui Normal file
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@ -0,0 +1,260 @@
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>FCDGui</class>
<widget class="QWidget" name="FCDGui">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>132</width>
<height>119</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="Preferred" vsizetype="Maximum">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="windowTitle">
<string>FunCubeDongle</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout">
<property name="spacing">
<number>3</number>
</property>
<property name="leftMargin">
<number>2</number>
</property>
<property name="topMargin">
<number>2</number>
</property>
<property name="rightMargin">
<number>2</number>
</property>
<property name="bottomMargin">
<number>2</number>
</property>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<spacer name="horizontalSpacer">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>0</width>
<height>0</height>
</size>
</property>
</spacer>
</item>
<item>
<widget class="ValueDial" name="centerFrequency" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Maximum" vsizetype="Maximum">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>32</width>
<height>16</height>
</size>
</property>
<property name="font">
<font>
<family>Monospace</family>
<pointsize>20</pointsize>
</font>
</property>
<property name="focusPolicy">
<enum>Qt::StrongFocus</enum>
</property>
<property name="toolTip">
<string>Tuner center frequency in kHz</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_2">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>0</width>
<height>0</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item>
<widget class="Line" name="line_4">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<!--item>
<layout class="QGridLayout" name="gridLayout_3">
<property name="spacing">
<number>3</number>
</property>
<item row="0" column="1">
<widget class="QSlider" name="samplerate">
<property name="toolTip">
<string>Device Samplerate</string>
</property>
<property name="maximum">
<number>4</number>
</property>
<property name="pageStep">
<number>1</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="label_12">
<property name="sizePolicy">
<sizepolicy hsizetype="Maximum" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="text">
<string>Rate</string>
</property>
</widget>
</item>
<item row="0" column="2">
<widget class="QLabel" name="samplerateText">
<property name="minimumSize">
<size>
<width>40</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>288k</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
</property>
</widget>
</item>
</layout>
</item>
<item>
<widget class="Line" name="line_3">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<item>
<layout class="QGridLayout" name="gridLayout_2">
<property name="spacing">
<number>3</number>
</property>
<item row="0" column="0">
<widget class="QLabel" name="label_11">
<property name="sizePolicy">
<sizepolicy hsizetype="Maximum" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="text">
<string>Gain</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QSlider" name="gain">
<property name="enabled">
<bool>false</bool>
</property>
<property name="toolTip">
<string>LNA amplification</string>
</property>
<property name="maximum">
<number>0</number>
</property>
<property name="pageStep">
<number>1</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
<item row="0" column="2">
<widget class="QLabel" name="gainText">
<property name="minimumSize">
<size>
<width>40</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>...</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
</property>
</widget>
</item>
</layout>
</item>
<item>
<widget class="Line" name="line">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item-->
<item>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QCheckBox" name="checkBox">
<property name="text">
<string>Low Range</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_3">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
</layout>
</widget>
<customwidgets>
<customwidget>
<class>ValueDial</class>
<extends>QWidget</extends>
<header>gui/valuedial.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>

135
plugins/samplesource/fcd/fcdinput.cpp Normal file
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@ -0,0 +1,135 @@
///////////////////////////////////////////////////////////////////////////////////
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <string.h>
#include <errno.h>
#include "fcdinput.h"
#include "fcdthread.h"
#include "fcdgui.h"
#include "util/simpleserializer.h"
MESSAGE_CLASS_DEFINITION(FCDInput::MsgConfigureFCD, Message)
//MESSAGE_CLASS_DEFINITION(FCDInput::MsgReportFCD, Message)
FCDInput::Settings::Settings()
{
}
void FCDInput::Settings::resetToDefaults()
{
}
QByteArray FCDInput::Settings::serialize() const
{
SimpleSerializer s(1);
return s.final();
}
bool FCDInput::Settings::deserialize(const QByteArray& data)
{
resetToDefaults();
return true;
}
FCDInput::FCDInput(MessageQueue* msgQueueToGUI) :
SampleSource(msgQueueToGUI),
m_settings(),
m_FCDThread(NULL),
m_deviceDescription()
{
}
FCDInput::~FCDInput()
{
stopInput();
}
bool FCDInput::startInput(int device)
{
QMutexLocker mutexLocker(&m_mutex);
if(m_FCDThread)
return false;
if(!m_sampleFifo.setSize(4096*16)) {
qCritical("Could not allocate SampleFifo");
return false;
}
if((m_FCDThread = new FCDThread(&m_sampleFifo)) == NULL) {
qFatal("out of memory");
return false;
}
m_deviceDescription = QString("Funcube Dongle");
qDebug("FCDInput: start");
return true;
}
void FCDInput::stopInput()
{
QMutexLocker mutexLocker(&m_mutex);
if(m_FCDThread) {
m_FCDThread->stopWork();
// wait for thread to quit ?
delete m_FCDThread;
m_FCDThread = NULL;
}
m_deviceDescription.clear();
}
const QString& FCDInput::getDeviceDescription() const
{
return m_deviceDescription;
}
int FCDInput::getSampleRate() const
{
return 192000;
}
quint64 FCDInput::getCenterFrequency() const
{
return m_generalSettings.m_centerFrequency;
}
bool FCDInput::handleMessage(Message* message)
{
if(MsgConfigureFCD::match(message)) {
MsgConfigureFCD* conf = (MsgConfigureFCD*)message;
if(!applySettings(conf->getGeneralSettings(), conf->getSettings(), false))
qDebug("FCD config error");
message->completed();
return true;
} else {
return false;
}
}
bool FCDInput::applySettings(const GeneralSettings& generalSettings, const Settings& settings, bool force)
{
QMutexLocker mutexLocker(&m_mutex);
if((m_generalSettings.m_centerFrequency != generalSettings.m_centerFrequency) || force) {
m_generalSettings.m_centerFrequency = generalSettings.m_centerFrequency;
if(m_FCDThread)
m_FCDThread->set_center_freq( (double)(generalSettings.m_centerFrequency) );
}
return true;
}

83
plugins/samplesource/fcd/fcdinput.h Normal file
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@ -0,0 +1,83 @@
///////////////////////////////////////////////////////////////////////////////////
// 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_FCDINPUT_H
#define INCLUDE_FCDINPUT_H
#include "dsp/samplesource/samplesource.h"
#include <QString>
struct fcd_buffer {
void *start;
size_t length;
};
class FCDThread;
class FCDInput : public SampleSource {
public:
struct Settings {
Settings();
void resetToDefaults();
QByteArray serialize() const;
bool deserialize(const QByteArray& data);
};
class MsgConfigureFCD : public Message {
MESSAGE_CLASS_DECLARATION
public:
const GeneralSettings& getGeneralSettings() const { return m_generalSettings; }
const Settings& getSettings() const { return m_settings; }
static MsgConfigureFCD* create(const GeneralSettings& generalSettings, const Settings& settings)
{
return new MsgConfigureFCD(generalSettings, settings);
}
private:
GeneralSettings m_generalSettings;
Settings m_settings;
MsgConfigureFCD(const GeneralSettings& generalSettings, const Settings& settings) :
Message(),
m_generalSettings(generalSettings),
m_settings(settings)
{ }
};
FCDInput(MessageQueue* msgQueueToGUI);
~FCDInput();
bool startInput(int device);
void stopInput();
const QString& getDeviceDescription() const;
int getSampleRate() const;
quint64 getCenterFrequency() const;
bool handleMessage(Message* message);
private:
QMutex m_mutex;
Settings m_settings;
FCDThread* m_FCDThread;
QString m_deviceDescription;
bool applySettings(const GeneralSettings& generalSettings, const Settings& settings, bool force);
};
#endif // INCLUDE_FCD_H

55
plugins/samplesource/fcd/fcdplugin.cpp Normal file
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@ -0,0 +1,55 @@
#include <QtPlugin>
#include <QAction>
#include "plugin/pluginapi.h"
#include "util/simpleserializer.h"
#include "fcdplugin.h"
#include "fcdgui.h"
const PluginDescriptor FCDPlugin::m_pluginDescriptor = {
QString("FunCube Input"),
QString("---"),
QString("(c) John Greb"),
QString("http://funcubedongle.com"),
true,
QString("___________")
};
FCDPlugin::FCDPlugin(QObject* parent) :
QObject(parent)
{
}
const PluginDescriptor& FCDPlugin::getPluginDescriptor() const
{
return m_pluginDescriptor;
}
void FCDPlugin::initPlugin(PluginAPI* pluginAPI)
{
m_pluginAPI = pluginAPI;
m_pluginAPI->registerSampleSource("org.osmocom.sdr.samplesource.fcd", this);
}
PluginInterface::SampleSourceDevices FCDPlugin::enumSampleSources()
{
SampleSourceDevices result;
QString displayedName(QString("Funcube Dongle #1"));
SimpleSerializer s(1);
s.writeS32(1, 0);
result.append(SampleSourceDevice(displayedName, "org.osmocom.sdr.samplesource.fcd", s.final()));
return result;
}
PluginGUI* FCDPlugin::createSampleSource(const QString& sourceName, const QByteArray& address)
{
if(sourceName == "org.osmocom.sdr.samplesource.fcd") {
FCDGui* gui = new FCDGui(m_pluginAPI);
m_pluginAPI->setInputGUI(gui);
return gui;
} else {
return NULL;
}
}

27
plugins/samplesource/fcd/fcdplugin.h Normal file
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@ -0,0 +1,27 @@
#ifndef INCLUDE_FCDPLUGIN_H
#define INCLUDE_FCDPLUGIN_H
#include <QObject>
#include "plugin/plugininterface.h"
class FCDPlugin : public QObject, PluginInterface {
Q_OBJECT
Q_INTERFACES(PluginInterface)
Q_PLUGIN_METADATA(IID "org.osmocom.sdr.samplesource.fcd")
public:
explicit FCDPlugin(QObject* parent = NULL);
const PluginDescriptor& getPluginDescriptor() const;
void initPlugin(PluginAPI* pluginAPI);
SampleSourceDevices enumSampleSources();
PluginGUI* createSampleSource(const QString& sourceName, const QByteArray& address);
private:
static const PluginDescriptor m_pluginDescriptor;
PluginAPI* m_pluginAPI;
};
#endif // INCLUDE_FCDPLUGIN_H

0
plugins/samplesource/fcd/fcdsource.cpp Normal file
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54
plugins/samplesource/fcd/fcdthread.cpp Normal file
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@ -0,0 +1,54 @@
///////////////////////////////////////////////////////////////////////////////////
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <errno.h>
#include "fcdthread.h"
#include "dsp/samplefifo.h"
FCDThread::FCDThread(SampleFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_convertBuffer(BLOCKSIZE),
m_sampleFifo(sampleFifo)
{
start();
}
FCDThread::~FCDThread()
{
}
void FCDThread::stopWork()
{
m_running = false;
wait();
}
void FCDThread::run()
{
m_running = true;
OpenSource("/dev/dsp");
if (fd < 0)
return;
while(m_running) {
work(BLOCKSIZE);
}
CloseSource();
}

60
plugins/samplesource/fcd/fcdthread.h Normal file
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@ -0,0 +1,60 @@
///////////////////////////////////////////////////////////////////////////////////
// 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_FCDTHREAD_H
#define INCLUDE_FCDTHREAD_H
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include "dsp/samplefifo.h"
#include "dsp/inthalfbandfilter.h"
#define SAMPLERATE 192000
#define BLOCKSIZE 8192
class FCDThread : public QThread {
Q_OBJECT
public:
FCDThread(SampleFifo* sampleFifo, QObject* parent = NULL);
~FCDThread();
void stopWork();
void OpenSource(const char *filename);
void CloseSource();
void set_center_freq(double freq);
int work(int n_items);
private:
int fd;
struct fcd_buffer *buffers;
unsigned int n_buffers;
void *recebuf_ptr;
unsigned int recebuf_len;
unsigned int recebuf_mmap_index;
QMutex m_startWaitMutex;
QWaitCondition m_startWaiter;
bool m_running;
SampleVector m_convertBuffer;
SampleFifo* m_sampleFifo;
void run();
};
#endif // INCLUDE_FCDTHREAD_H