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#include <QtMultimedia/QAudioDeviceInfo>
#include <QtMultimedia/QAudioOutput>
#include <QtCore/QFile>
#include <QtDebug>
#include "fmrxservice.h"
#include "fmrxcontrol.h"
#include "fmrxproxy.h"
// Again, this would be incredibly shorter if QAudioOuput could be used.
// Unfortunately, it is completely useless in the Harmattan version.
struct FmRxPriv
{
QAudioOutput *out;
QFile *in;
int fd;
bool active;
double frequency;
};
FmRxService::FmRxService(QObject *parent) :
QMediaService(parent)
{
m_proxy = new FmRxProxy(this);
m_control = new FmRxControl(this);
m_priv = new FmRxPriv;
QAudioFormat format;
format.setFrequency(48000);
format.setChannels(2);
format.setSampleType(QAudioFormat::SignedInt);
format.setSampleSize(16);
format.setByteOrder(QAudioFormat::LittleEndian);
format.setCodec("audio/pcm");
QAudioDeviceInfo info = QAudioDeviceInfo::defaultOutputDevice();
if (!info.isFormatSupported(format)) {
qWarning("FM radio format not supported by audio output");
}
qDebug("Starting output to %s", qPrintable(info.deviceName()));
m_priv->out = new QAudioOutput(info, format, this);
m_priv->in = new QFile(this);
m_priv->active = false;
connect(m_proxy, SIGNAL(Tuned(double)), this, SLOT(handleTuned(double)));
connect(m_proxy, SIGNAL(Stopped()), this, SLOT(handleStopped()));
connect(m_proxy, SIGNAL(PiReceived(ushort)), this, SIGNAL(piReceived(ushort)));
connect(m_proxy, SIGNAL(PsReceived(QString)), this, SIGNAL(psReceived(QString)));
connect(m_proxy, SIGNAL(RtReceived(QString)), this, SIGNAL(rtReceived(QString)));
connect(m_priv->out, SIGNAL(stateChanged(QAudio::State)),
this, SLOT(handleOutState(QAudio::State)));
}
FmRxService::~FmRxService()
{
delete m_priv;
}
QMediaControl *FmRxService::requestControl(const char *name)
{
if (qstrcmp(name, QRadioTunerControl_iid) == 0)
return m_control;
return 0;
}
void FmRxService::releaseControl(QMediaControl *control)
{
// Do nothing
}
void FmRxService::start()
{
m_priv->fd = m_proxy->Connect();
m_priv->in->open(m_priv->fd, QIODevice::ReadOnly);
m_priv->out->start(m_priv->in);
qDebug("Starting fmrx service");
}
void FmRxService::stop()
{
m_priv->out->stop();
m_priv->in->close();
close(m_priv->fd);
}
bool FmRxService::isAvailable() const
{
// TODO Check avaibility of fmrxd service
return true;
}
QtMultimediaKit::AvailabilityError FmRxService::availabilityError() const
{
return QtMultimediaKit::NoError;
}
bool FmRxService::isActive() const
{
return m_priv->active;
}
void FmRxService::handleTuned(double frequency)
{
if (!qFuzzyCompare(m_priv->frequency, frequency)) {
m_priv->frequency = frequency;
emit tuned(frequency);
}
if (!m_priv->active) {
m_priv->active = true;
emit started();
}
}
void FmRxService::handleStopped()
{
if (m_priv->active) {
m_priv->active = false;
emit stopped();
}
}
void FmRxService::handleOutState(QAudio::State state)
{
qDebug() << "New out state = " << state;
if (state == QAudio::IdleState &&
m_priv->out->error() == QAudio::UnderrunError) {
qDebug() << "Restarting";
m_priv->out->start(m_priv->in);
}
}
double FmRxService::frequency()
{
return m_priv->frequency;
}
void FmRxService::setFrequency(double frequency)
{
m_proxy->Tune(frequency);
}
void FmRxService::searchForward()
{
m_proxy->SearchForward();
}
void FmRxService::searchBackward()
{
m_proxy->SearchBackward();
}
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