///////////////////////////////////////////////////////////////////////////////////
// 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 . //
///////////////////////////////////////////////////////////////////////////////////
#include
#include
#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);
if(m_V4LThread)
return false;
if(!m_sampleFifo.setSize(4096*16)) {
qCritical("Could not allocate SampleFifo");
return false;
}
if((m_V4LThread = new V4LThread(&m_sampleFifo)) == 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;
if(!applySettings(conf->getGeneralSettings(), conf->getSettings(), false))
qDebug("V4L config error");
message->completed();
return true;
} else {
return false;
}
}
bool V4LInput::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_V4LThread)
m_V4LThread->set_center_freq( (double)(generalSettings.m_centerFrequency
+ (SAMPLERATE / 4) ));
}
if((m_settings.m_gain != settings.m_gain) || force) {
m_settings.m_gain = settings.m_gain;
if(m_V4LThread)
m_V4LThread->set_tuner_gain((double)m_settings.m_gain);
}
return true;
}