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Clone Kernel SDR driver.

This commit is contained in:
John Greb 2015-03-31 18:46:29 +01:00
parent 6ac25f7bad
commit 73832a6c45
25 changed files with 1201 additions and 4 deletions
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3
CMakeLists.txt
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@ -1,6 +1,7 @@
cmake_minimum_required(VERSION 2.8.9)
option(KERNEL "Use Linux Kernel Video4Linux Source." OFF)
option(V4L-RTL "Use Linux Kernel RTL-SDR Source." OFF)
option(V4L-MSI "Use Linux Kernel MSI2500 Source." OFF)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)

2
Readme.md
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@ -17,7 +17,7 @@ For Ubuntu:
"librtlsdr-dev" is in the "universe" repo. (utopic 14.10 amd64.)
Use "cmake ../ -DKERNEL=ON" to build the Linux kernel driver (Experimental). Needs a recent kernel and libv4l2. Will need extra work to support Airspy and Hackrf. Needs "cp KERNEL_SOURCE/include/linux/compiler.h /usr/include/linux/" and "cp KERNEL_SOURCE/include/uapi/linux/videodev2.h /usr/include/uapi/linux/" and package "libv4l-dev".
Use "cmake ../ -DV4L-RTL=ON" to build the Linux kernel driver for RTL-SDR (Experimental). Needs a recent kernel and libv4l2. Will need extra work to support SDRPlay. Needs "cp KERNEL_SOURCE/include/linux/compiler.h /usr/include/linux/" and "cp KERNEL_SOURCE/include/uapi/linux/videodev2.h /usr/include/uapi/linux/" and package "libv4l-dev".
The Gnuradio plugin source needs extra packages, including "liblog4cpp-dev libboost-system-dev gnuradio-dev libosmosdr-dev"

9
plugins/samplesource/CMakeLists.txt
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@ -10,10 +10,15 @@ if(LIBUSB_FOUND AND LIBOSMOSDR_FOUND)
add_subdirectory(osmosdr)
endif(LIBUSB_FOUND AND LIBOSMOSDR_FOUND)
if(KERNEL AND UNIX)
if(V4L-RTL)
FIND_LIBRARY (LIBV4L2 v4l2)
FIND_PATH (LIBV4L2H libv4l2.h)
add_subdirectory(v4l)
add_subdirectory(v4l-rtl)
endif()
if(V4L-MSI)
FIND_LIBRARY (LIBV4L2 v4l2)
FIND_PATH (LIBV4L2H libv4l2.h)
add_subdirectory(v4l-msi)
endif()
if(LIBUSB_FOUND AND UNIX)

0
plugins/samplesource/v4l/CMakeLists.txt → plugins/samplesource/v4l-msi/CMakeLists.txt
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0
plugins/samplesource/v4l/v4lgui.cpp → plugins/samplesource/v4l-msi/v4lgui.cpp
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0
plugins/samplesource/v4l/v4lgui.h → plugins/samplesource/v4l-msi/v4lgui.h
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0
plugins/samplesource/v4l/v4lgui.ui → plugins/samplesource/v4l-msi/v4lgui.ui
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0
plugins/samplesource/v4l/v4linput.cpp → plugins/samplesource/v4l-msi/v4linput.cpp
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0
plugins/samplesource/v4l/v4linput.h → plugins/samplesource/v4l-msi/v4linput.h
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0
plugins/samplesource/v4l/v4lplugin.cpp → plugins/samplesource/v4l-msi/v4lplugin.cpp
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0
plugins/samplesource/v4l/v4lplugin.h → plugins/samplesource/v4l-msi/v4lplugin.h
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0
plugins/samplesource/v4l/v4lsource.cpp → plugins/samplesource/v4l-msi/v4lsource.cpp
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0
plugins/samplesource/v4l/v4lthread.cpp → plugins/samplesource/v4l-msi/v4lthread.cpp
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0
plugins/samplesource/v4l/v4lthread.h → plugins/samplesource/v4l-msi/v4lthread.h
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50
plugins/samplesource/v4l-rtl/CMakeLists.txt Normal file
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@ -0,0 +1,50 @@
project(v4l)
set(v4l_SOURCES
v4lgui.cpp
v4linput.cpp
v4lplugin.cpp
v4lthread.cpp
v4lsource.cpp
)
set(v4l_HEADERS
v4lgui.h
v4linput.h
v4lplugin.h
v4lthread.h
)
set(v4l_FORMS
v4lgui.ui
)
include_directories(
.
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_SOURCE_DIR}/include
${CMAKE_SOURCE_DIR}/include-gpl
${LIBV4L2H}
)
#include(${QT_USE_FILE})
add_definitions(${QT_DEFINITIONS})
add_definitions(-DQT_PLUGIN)
add_definitions(-DQT_SHARED)
#qt4_wrap_cpp(v4l_HEADERS_MOC ${v4l_HEADERS})
qt5_wrap_ui(v4l_FORMS_HEADERS ${v4l_FORMS})
add_library(inputv4l SHARED
${v4l_SOURCES}
${v4l_HEADERS_MOC}
${v4l_FORMS_HEADERS}
)
target_link_libraries(inputv4l
${QT_LIBRARIES}
${LIBV4L2}
sdrbase
)
qt5_use_modules(inputv4l Core Widgets OpenGL Multimedia)

145
plugins/samplesource/v4l-rtl/v4lgui.cpp Normal file
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@ -0,0 +1,145 @@
#include "v4lgui.h"
#include "ui_v4lgui.h"
#include "plugin/pluginapi.h"
V4LGui::V4LGui(PluginAPI* pluginAPI, QWidget* parent) :
QWidget(parent),
ui(new Ui::V4LGui),
m_pluginAPI(pluginAPI),
m_settings(),
m_sampleSource(NULL)
{
ui->setupUi(this);
ui->centerFrequency->setValueRange(7, 20000U, 2200000U);
connect(&m_updateTimer, SIGNAL(timeout()), this, SLOT(updateHardware()));
displaySettings();
m_sampleSource = new V4LInput(m_pluginAPI->getMainWindowMessageQueue());
m_pluginAPI->setSampleSource(m_sampleSource);
}
V4LGui::~V4LGui()
{
delete ui;
}
void V4LGui::destroy()
{
delete this;
}
void V4LGui::setName(const QString& name)
{
setObjectName(name);
}
void V4LGui::resetToDefaults()
{
m_generalSettings.resetToDefaults();
m_settings.resetToDefaults();
displaySettings();
sendSettings();
}
QByteArray V4LGui::serializeGeneral() const
{
return m_generalSettings.serialize();
}
bool V4LGui::deserializeGeneral(const QByteArray&data)
{
if(m_generalSettings.deserialize(data)) {
displaySettings();
sendSettings();
return true;
} else {
resetToDefaults();
return false;
}
}
quint64 V4LGui::getCenterFrequency() const
{
return m_generalSettings.m_centerFrequency;
}
QByteArray V4LGui::serialize() const
{
return m_settings.serialize();
}
bool V4LGui::deserialize(const QByteArray& data)
{
if(m_settings.deserialize(data)) {
displaySettings();
sendSettings();
return true;
} else {
resetToDefaults();
return false;
}
}
bool V4LGui::handleMessage(Message* message)
{
if(V4LInput::MsgReportV4L::match(message)) {
m_gains = ((V4LInput::MsgReportV4L*)message)->getGains();
displaySettings();
message->completed();
return true;
} else {
return false;
}
}
void V4LGui::displaySettings()
{
ui->centerFrequency->setValue(m_generalSettings.m_centerFrequency / 1000);
if(m_gains.size() > 0) {
int dist = abs(m_settings.m_gain - m_gains[0]);
int pos = 0;
for(uint i = 1; i < m_gains.size(); i++) {
if(abs(m_settings.m_gain - m_gains[i]) < dist) {
dist = abs(m_settings.m_gain - m_gains[i]);
pos = i;
}
}
ui->gainText->setText(tr("%1.%2").arg(m_gains[pos] / 10).arg(abs(m_gains[pos] % 10)));
ui->gain->setMaximum(m_gains.size() - 1);
ui->gain->setEnabled(true);
ui->gain->setValue(pos);
} else {
ui->gain->setMaximum(0);
ui->gain->setEnabled(false);
ui->gain->setValue(0);
}
}
void V4LGui::sendSettings()
{
if(!m_updateTimer.isActive())
m_updateTimer.start(100);
}
void V4LGui::on_centerFrequency_changed(quint64 value)
{
m_generalSettings.m_centerFrequency = value * 1000;
sendSettings();
}
void V4LGui::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();
}
void V4LGui::updateHardware()
{
V4LInput::MsgConfigureV4L* message = V4LInput::MsgConfigureV4L::create(m_generalSettings, m_settings);
message->submit(m_pluginAPI->getDSPEngineMessageQueue());
m_updateTimer.stop();
}

51
plugins/samplesource/v4l-rtl/v4lgui.h Normal file
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@ -0,0 +1,51 @@
#ifndef INCLUDE_V4LGUI_H
#define INCLUDE_V4LGUI_H
#include <QTimer>
#include "plugin/plugingui.h"
#include "v4linput.h"
class PluginAPI;
namespace Ui {
class V4LGui;
}
class V4LGui : public QWidget, public PluginGUI {
Q_OBJECT
public:
explicit V4LGui(PluginAPI* pluginAPI, QWidget* parent = NULL);
~V4LGui();
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::V4LGui* ui;
PluginAPI* m_pluginAPI;
SampleSource::GeneralSettings m_generalSettings;
V4LInput::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 updateHardware();
};
#endif // INCLUDE_V4LGUI_H

177
plugins/samplesource/v4l-rtl/v4lgui.ui Normal file
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@ -0,0 +1,177 @@
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>V4LGui</class>
<widget class="QWidget" name="V4LGui">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>132</width>
<height>82</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="Preferred" vsizetype="Maximum">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="windowTitle">
<string>Video4Linux</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>
<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>
</layout>
</widget>
<customwidgets>
<customwidget>
<class>ValueDial</class>
<extends>QWidget</extends>
<header>gui/valuedial.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>

167
plugins/samplesource/v4l-rtl/v4linput.cpp Normal file
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@ -0,0 +1,167 @@
///////////////////////////////////////////////////////////////////////////////////
// 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 "v4linput.h"
#include "v4lthread.h"
#include "v4lgui.h"
#include "util/simpleserializer.h"
MESSAGE_CLASS_DEFINITION(V4LInput::MsgConfigureV4L, Message)
MESSAGE_CLASS_DEFINITION(V4LInput::MsgReportV4L, Message)
V4LInput::Settings::Settings() :
m_gain(0)
{
}
void V4LInput::Settings::resetToDefaults()
{
m_gain = 0;
}
QByteArray V4LInput::Settings::serialize() const
{
SimpleSerializer s(1);
s.writeS32(1, m_gain);
s.writeS32(2, SAMPLERATE);
return s.final();
}
bool V4LInput::Settings::deserialize(const QByteArray& data)
{
SimpleDeserializer d(data);
if(!d.isValid()) {
resetToDefaults();
return false;
}
if(d.getVersion() == 1) {
d.readS32(1, &m_gain, 0);
//d.readS32(2, &m_samplerate, 0);
return true;
} else {
resetToDefaults();
return false;
}
}
V4LInput::V4LInput(MessageQueue* msgQueueToGUI) :
SampleSource(msgQueueToGUI),
m_settings(),
m_V4LThread(NULL),
m_deviceDescription()
{
}
V4LInput::~V4LInput()
{
stopInput();
}
bool V4LInput::startInput(int device)
{
QMutexLocker mutexLocker(&m_mutex);
double freq;
if(m_V4LThread)
return false;
if(!m_sampleFifo.setSize(4096*16)) {
qCritical("Could not allocate SampleFifo");
return false;
}
freq = (double)getCenterFrequency();
if((m_V4LThread = new V4LThread(&m_sampleFifo, freq)) == NULL) {
qFatal("out of memory");
return false;
}
m_deviceDescription = QString("RTL-SDR /dev/swradio0");
qDebug("V4LInput: start");
//MsgReportV4L::create(m_gains)->submit(m_guiMessageQueue);
return true;
}
void V4LInput::stopInput()
{
QMutexLocker mutexLocker(&m_mutex);
if(m_V4LThread) {
m_V4LThread->stopWork();
// wait for thread to quit ?
delete m_V4LThread;
m_V4LThread = NULL;
}
m_deviceDescription.clear();
}
const QString& V4LInput::getDeviceDescription() const
{
return m_deviceDescription;
}
int V4LInput::getSampleRate() const
{
int result = SAMPLERATE / 4;
return result;
}
quint64 V4LInput::getCenterFrequency() const
{
return m_generalSettings.m_centerFrequency;
}
bool V4LInput::handleMessage(Message* message)
{
if(MsgConfigureV4L::match(message)) {
MsgConfigureV4L* conf = (MsgConfigureV4L*)message;
applySettings(conf->getGeneralSettings(), conf->getSettings(), false);
message->completed();
return true;
} else {
return false;
}
}
void V4LInput::applySettings(const GeneralSettings& generalSettings, const Settings& settings, bool force)
{
QMutexLocker mutexLocker(&m_mutex);
if (!m_V4LThread) {
m_generalSettings.m_centerFrequency = generalSettings.m_centerFrequency;
return;
}
if((m_generalSettings.m_centerFrequency != generalSettings.m_centerFrequency) || force) {
m_V4LThread->set_center_freq( (double)(generalSettings.m_centerFrequency
+ (SAMPLERATE / 4) ));
}
m_generalSettings.m_centerFrequency = generalSettings.m_centerFrequency;
#if 0
if((m_settings.m_gain != settings.m_gain) || force) {
m_settings.m_gain = settings.m_gain;
m_V4LThread->set_tuner_gain((double)m_settings.m_gain);
}
#endif
}

106
plugins/samplesource/v4l-rtl/v4linput.h Normal file
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@ -0,0 +1,106 @@
///////////////////////////////////////////////////////////////////////////////////
// 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_V4LINPUT_H
#define INCLUDE_V4LINPUT_H
#include "dsp/samplesource/samplesource.h"
#include <QString>
struct v4l_buffer {
void *start;
size_t length;
};
class V4LThread;
class V4LInput : public SampleSource {
public:
struct Settings {
qint32 m_gain;
Settings();
void resetToDefaults();
QByteArray serialize() const;
bool deserialize(const QByteArray& data);
};
class MsgConfigureV4L : public Message {
MESSAGE_CLASS_DECLARATION
public:
const GeneralSettings& getGeneralSettings() const { return m_generalSettings; }
const Settings& getSettings() const { return m_settings; }
static MsgConfigureV4L* create(const GeneralSettings& generalSettings, const Settings& settings)
{
return new MsgConfigureV4L(generalSettings, settings);
}
private:
GeneralSettings m_generalSettings;
Settings m_settings;
MsgConfigureV4L(const GeneralSettings& generalSettings, const Settings& settings) :
Message(),
m_generalSettings(generalSettings),
m_settings(settings)
{ }
};
class MsgReportV4L : public Message {
MESSAGE_CLASS_DECLARATION
public:
const std::vector<int>& getGains() const { return m_gains; }
static MsgReportV4L* create(const std::vector<int>& gains)
{
return new MsgReportV4L(gains);
}
protected:
std::vector<int> m_gains;
MsgReportV4L(const std::vector<int>& gains) :
Message(),
m_gains(gains)
{ }
};
V4LInput(MessageQueue* msgQueueToGUI);
~V4LInput();
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;
V4LThread* m_V4LThread;
QString m_deviceDescription;
std::vector<int> m_gains;
void applySettings(const GeneralSettings& generalSettings, const Settings& settings, bool force);
};
#endif // INCLUDE_V4L_H

56
plugins/samplesource/v4l-rtl/v4lplugin.cpp Normal file
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#include <QtPlugin>
#include <QAction>
#include <rtl-sdr.h>
#include "plugin/pluginapi.h"
#include "util/simpleserializer.h"
#include "v4lplugin.h"
#include "v4lgui.h"
const PluginDescriptor V4LPlugin::m_pluginDescriptor = {
QString("V4L Input"),
QString("3.18"),
QString("(c) 2014 John Greb"),
QString("http://palosaari.fi/linux/"),
true,
QString("github.com/hexameron/rtl-sdrangelove")
};
V4LPlugin::V4LPlugin(QObject* parent) :
QObject(parent)
{
}
const PluginDescriptor& V4LPlugin::getPluginDescriptor() const
{
return m_pluginDescriptor;
}
void V4LPlugin::initPlugin(PluginAPI* pluginAPI)
{
m_pluginAPI = pluginAPI;
m_pluginAPI->registerSampleSource("org.osmocom.sdr.samplesource.v4l", this);
}
PluginInterface::SampleSourceDevices V4LPlugin::enumSampleSources()
{
SampleSourceDevices result;
QString displayedName(QString("Kernel Source #1"));
SimpleSerializer s(1);
s.writeS32(1, 0);
result.append(SampleSourceDevice(displayedName, "org.osmocom.sdr.samplesource.v4l", s.final()));
return result;
}
PluginGUI* V4LPlugin::createSampleSource(const QString& sourceName, const QByteArray& address)
{
if(sourceName == "org.osmocom.sdr.samplesource.v4l") {
V4LGui* gui = new V4LGui(m_pluginAPI);
m_pluginAPI->setInputGUI(gui);
return gui;
} else {
return NULL;
}
}

27
plugins/samplesource/v4l-rtl/v4lplugin.h Normal file
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#ifndef INCLUDE_V4LPLUGIN_H
#define INCLUDE_V4LPLUGIN_H
#include <QObject>
#include "plugin/plugininterface.h"
class V4LPlugin : public QObject, PluginInterface {
Q_OBJECT
Q_INTERFACES(PluginInterface)
Q_PLUGIN_METADATA(IID "org.osmocom.sdr.samplesource.v4l")
public:
explicit V4LPlugin(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_V4LPLUGIN_H

291
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/*
* Copyright 2013 Antti Palosaari <crope@iki.fi>
*
* This 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; either version 3, or (at your option)
* any later version.
*
* This software 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "v4linput.h"
#include "v4lthread.h"
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <uapi/linux/videodev2.h>
#include "libv4l2.h"
#include <fcntl.h>
#include <sys/mman.h>
/* Control classes */
#define V4L2_CTRL_CLASS_USER 0x00980000 /* Old-style 'user' controls */
/* User-class control IDs */
#define V4L2_CID_BASE (V4L2_CTRL_CLASS_USER | 0x900)
#define V4L2_CID_USER_BASE V4L2_CID_BASE
#define CID_SAMPLING_MODE ((V4L2_CID_USER_BASE | 0xf000) + 0)
#define CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 1)
#define CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 2)
#define CID_TUNER_RF ((V4L2_CID_USER_BASE | 0xf000) + 10)
#define CID_TUNER_BW ((V4L2_CID_USER_BASE | 0xf000) + 11)
#define CID_TUNER_IF ((V4L2_CID_USER_BASE | 0xf000) + 12)
#define CID_TUNER_GAIN ((V4L2_CID_USER_BASE | 0xf000) + 13)
#define V4L2_PIX_FMT_SDR_U8 v4l2_fourcc('C', 'U', '0', '8') /* unsigned 8-bit Complex*/
#define V4L2_PIX_FMT_SDR_U16LE v4l2_fourcc('C', 'U', '1', '6') /* unsigned 16-bit Complex*/
#define CLEAR(x) memset(&(x), 0, sizeof(x))
static void xioctl(int fh, unsigned long int request, void *arg)
{
int ret;
do {
ret = v4l2_ioctl(fh, request, arg);
} while (ret == -1 && ((errno == EINTR) || (errno == EAGAIN)));
if (ret == -1) {
qCritical("V4L2 ioctl error: %d", errno);
}
}
void
V4LThread::OpenSource(const char *filename)
{
struct v4l2_format fmt;
struct v4l2_buffer buf;
struct v4l2_requestbuffers req;
enum v4l2_buf_type type;
unsigned int i;
recebuf_len = 0;
// fd = v4l2_open(filename, O_RDWR | O_NONBLOCK, 0);
fd = open(filename, O_RDWR | O_NONBLOCK, 0);
if (fd < 0) {
qCritical("Cannot open /dev/swradio0 :%d", fd);
return;
}
pixelformat = V4L2_PIX_FMT_SDR_U8;
// RTLSDR has limited ioctls in 3.18, expect fail.
qCritical("Want Pixelformat : CU08");
CLEAR(fmt);
fmt.type = V4L2_BUF_TYPE_SDR_CAPTURE;
fmt.fmt.sdr.pixelformat = pixelformat;
xioctl(fd, VIDIOC_S_FMT, &fmt);
qCritical("Got Pixelformat : %4.4s", (char *)&fmt.fmt.sdr.pixelformat);
CLEAR(req);
req.count = 8;
req.type = V4L2_BUF_TYPE_SDR_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_REQBUFS, &req);
buffers = (struct v4l_buffer*) calloc(req.count, sizeof(*buffers));
for (n_buffers = 0; n_buffers < req.count; n_buffers++) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = n_buffers;
xioctl(fd, VIDIOC_QUERYBUF, &buf);
buffers[n_buffers].length = buf.length;
buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED,
fd, buf.m.offset);
if (buffers[n_buffers].start == MAP_FAILED) {
qCritical("V4L2 buffer mmap failed");
}
}
for (i = 0; i < n_buffers; i++) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
xioctl(fd, VIDIOC_QBUF, &buf);
}
set_sample_rate((double)SAMPLERATE);
set_center_freq( centerFreq + (SAMPLERATE / 4) );
// start streaming
type = V4L2_BUF_TYPE_SDR_CAPTURE;
xioctl(fd, VIDIOC_STREAMON, &type);
}
void
V4LThread::CloseSource()
{
unsigned int i;
enum v4l2_buf_type type;
// stop streaming
type = V4L2_BUF_TYPE_SDR_CAPTURE;
xioctl(fd, VIDIOC_STREAMOFF, &type);
for (i = 0; i < n_buffers; i++)
v4l2_munmap(buffers[i].start, buffers[i].length);
v4l2_close(fd);
fd = -1;
}
void
V4LThread::set_sample_rate(double samp_rate)
{
struct v4l2_frequency frequency;
memset (&frequency, 0, sizeof(frequency));
frequency.tuner = 0;
frequency.type = V4L2_TUNER_ADC;
frequency.frequency = samp_rate / 1;
xioctl(fd, VIDIOC_S_FREQUENCY, &frequency);
return;
}
// Cannot change freq while streaming in Linux 4.0
void
V4LThread::set_center_freq(double freq)
{
struct v4l2_frequency frequency;
if (fd <= 0)
return;
memset (&frequency, 0, sizeof(frequency));
frequency.tuner = 1;
frequency.type = V4L2_TUNER_RF;
frequency.frequency = freq;
xioctl(fd, VIDIOC_S_FREQUENCY, &frequency);
return;
}
void
V4LThread::set_bandwidth(double bandwidth)
{
struct v4l2_ext_controls ext_ctrls;
struct v4l2_ext_control ext_ctrl;
memset (&ext_ctrl, 0, sizeof(ext_ctrl));
ext_ctrl.id = CID_TUNER_BW;
ext_ctrl.value = bandwidth;
memset (&ext_ctrls, 0, sizeof(ext_ctrls));
ext_ctrls.ctrl_class = V4L2_CTRL_CLASS_USER;
ext_ctrls.count = 1;
ext_ctrls.controls = &ext_ctrl;
xioctl(fd, VIDIOC_S_EXT_CTRLS, &ext_ctrls);
return;
}
void
V4LThread::set_tuner_gain(double gain)
{
struct v4l2_ext_controls ext_ctrls;
struct v4l2_ext_control ext_ctrl;
if (fd <= 0)
return;
memset (&ext_ctrl, 0, sizeof(ext_ctrl));
ext_ctrl.id = CID_TUNER_GAIN;
ext_ctrl.value = gain;
memset (&ext_ctrls, 0, sizeof(ext_ctrls));
ext_ctrls.ctrl_class = V4L2_CTRL_CLASS_USER;
ext_ctrls.count = 1;
ext_ctrls.controls = &ext_ctrl;
xioctl(fd, VIDIOC_S_EXT_CTRLS, &ext_ctrls);
return;
}
int
V4LThread::work(int noutput_items)
{
int ret;
struct timeval tv;
struct v4l2_buffer buf;
fd_set fds;
qint16 xreal, yimag;
uint8_t* b;
SampleVector::iterator it;
unsigned int pos = 0;
// in is 4*8bit*2(IQ), 8 bytes; out is 1*16bit*2(IQ) , 4bytes
it = m_convertBuffer.begin();
if (recebuf_len > 0) {
b = (uint8_t *) recebuf_ptr;
unsigned int len = noutput_items * 8;
if (len > recebuf_len)
len = recebuf_len;
for (pos = 0; pos < len - 7; pos += 8) {
xreal = b[pos+0] - b[pos+3] + b[pos+7] - b[pos+4];
yimag = b[pos+1] - b[pos+5] + b[pos+2] - b[pos+6];
Sample s( xreal << 3, yimag << 3 );
*it = s;
it++;
}
m_sampleFifo->write(m_convertBuffer.begin(), it);
recebuf_len -= pos;
recebuf_ptr = (void*)(b + pos);
}
// return now if there is still data in buffer, else free buffer and get another.
if (recebuf_len >= 8)
return pos / 8;
{ // frre buffer, if there was one.
if (pos > 0) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = recebuf_mmap_index;
xioctl(fd, VIDIOC_QBUF, &buf);
}
/* Read data from device */
do {
FD_ZERO(&fds);
FD_SET(fd, &fds);
// Timeout
tv.tv_sec = 2;
tv.tv_usec = 0;
ret = select(fd + 1, &fds, NULL, NULL, &tv);
} while ((ret == -1 && (errno = EINTR)));
if (ret == -1) {
perror("select");
return errno;
}
/* dequeue mmap buf (receive data) */
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_DQBUF, &buf);
/* store buffer in order to handle it during next call */
recebuf_ptr = buffers[buf.index].start;
recebuf_len = buf.bytesused;
recebuf_mmap_index = buf.index;
}
return pos / 8;
}

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///////////////////////////////////////////////////////////////////////////////////
// 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 "v4lthread.h"
#include "dsp/samplefifo.h"
V4LThread::V4LThread(SampleFifo* sampleFifo, double frequency, QObject* parent) :
QThread(parent),
m_running(false),
m_convertBuffer(BLOCKSIZE),
m_sampleFifo(sampleFifo)
{
centerFreq = frequency;
start();
}
V4LThread::~V4LThread()
{
}
void V4LThread::stopWork()
{
m_running = false;
wait();
}
void V4LThread::run()
{
m_running = true;
OpenSource("/dev/swradio0");
if (fd < 0)
return;
while(m_running) {
work(BLOCKSIZE);
}
CloseSource();
}

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///////////////////////////////////////////////////////////////////////////////////
// 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_V4LTHREAD_H
#define INCLUDE_V4LTHREAD_H
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include "dsp/samplefifo.h"
#include "dsp/inthalfbandfilter.h"
#define SAMPLERATE 1024000
#define BLOCKSIZE 4096
class V4LThread : public QThread {
Q_OBJECT
public:
V4LThread(SampleFifo* sampleFifo, double frequency, QObject* parent = NULL);
~V4LThread();
void stopWork();
void OpenSource(const char *filename);
void CloseSource();
void set_sample_rate(double samp_rate);
void set_center_freq(double freq);
void set_bandwidth(double bandwidth);
void set_tuner_gain(double gain);
int work(int n_items);
private:
int fd;
quint32 pixelformat;
struct v4l_buffer *buffers;
unsigned int n_buffers;
void *recebuf_ptr;
unsigned int recebuf_len;
unsigned int recebuf_mmap_index;
double centerFreq;
QMutex m_startWaitMutex;
QWaitCondition m_startWaiter;
bool m_running;
SampleVector m_convertBuffer;
SampleFifo* m_sampleFifo;
void run();
};
#endif // INCLUDE_V4LTHREAD_H