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/* This file is part of the KDE project.
Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QObject>
#include <QCoreApplication>
#include <mdaaudiooutputstream.h>
#include "audioequalizer.h"
#include "bassboost.h"
#include "environmentalreverb.h"
#include "loudness.h"
#include "stereowidening.h"
#include "effectfactory.h"
QT_BEGIN_NAMESPACE
using namespace Phonon;
using namespace Phonon::MMF;
/*! \class MMF::EffectFactory
\internal
*/
EffectFactory::EffectFactory(QObject *parent)
: QObject(parent)
, m_initialized(false)
{
}
EffectFactory::~EffectFactory()
{
}
//-----------------------------------------------------------------------------
// Public functions
//-----------------------------------------------------------------------------
AbstractAudioEffect *EffectFactory::createAudioEffect(Type type,
QObject *parent)
{
// Lazily initialize
if (!m_initialized)
initialize();
Q_ASSERT(parent);
const QList<EffectParameter>& parameters = data(type).m_parameters;
AbstractAudioEffect *effect = 0;
switch (type)
{
case TypeBassBoost:
effect = new BassBoost(parent, parameters);
break;
case TypeAudioEqualizer:
effect = new AudioEqualizer(parent, parameters);
break;
case TypeEnvironmentalReverb:
effect = new EnvironmentalReverb(parent, parameters);
break;
case TypeLoudness:
effect = new Loudness(parent, parameters);
break;
case TypeStereoWidening:
effect = new StereoWidening(parent, parameters);
break;
// Not implemented
case TypeDistanceAttenuation:
case TypeListenerOrientation:
case TypeSourceOrientation:
// Fall through
default:
Q_ASSERT_X(false, Q_FUNC_INFO, "Unknown effect");
}
return effect;
}
QHash<QByteArray, QVariant> EffectFactory::audioEffectDescriptions(Type type)
{
// Lazily initialize
if (!m_initialized)
initialize();
return data(type).m_descriptions;
}
QList<int> EffectFactory::effectIndexes()
{
// Lazily initialize
if (!m_initialized)
initialize();
QList<int> result;
QHash<Type, EffectData>::const_iterator i = m_effectData.begin();
for ( ; i != m_effectData.end(); ++i)
if (i.value().m_supported)
result.append(i.key());
return result;
}
//-----------------------------------------------------------------------------
// Private functions
//-----------------------------------------------------------------------------
#define INITIALIZE_EFFECT(Effect) \
{ \
EffectData data = getData<Effect>(); \
m_effectData.insert(Type##Effect, data); \
}
void EffectFactory::initialize()
{
Q_ASSERT_X(!m_initialized, Q_FUNC_INFO, "Already initialized");
INITIALIZE_EFFECT(AudioEqualizer)
INITIALIZE_EFFECT(BassBoost)
INITIALIZE_EFFECT(EnvironmentalReverb)
INITIALIZE_EFFECT(Loudness)
INITIALIZE_EFFECT(StereoWidening)
m_initialized = true;
}
// This class is just a wrapper which allows us to instantiate a
// CMdaAudioOutputStream object. This is done in order to allow the
// effects API to query the DevSound implementation, to discover
// which effects are supported and what parameters they take.
// Ideally, we would use CMMFDevSound directly, but this class is not
// available in the public S60 SDK.
class OutputStreamFactory : public MMdaAudioOutputStreamCallback
{
public:
CMdaAudioOutputStream* create()
{
CMdaAudioOutputStream* stream = 0;
QT_TRAP_THROWING(stream = CMdaAudioOutputStream::NewL(*this));
return stream;
}
private:
void MaoscOpenComplete(TInt /*aError*/) { }
void MaoscBufferCopied(TInt /*aError*/, const TDesC8& /*aBuffer*/) { }
void MaoscPlayComplete(TInt /*aError*/) { }
};
template<typename BackendNode>
EffectFactory::EffectData EffectFactory::getData()
{
EffectData data;
// Create a temporary CMdaAudioOutputStream object, so that the effects
// API can query DevSound to discover which effects are supported.
OutputStreamFactory streamFactory;
QScopedPointer<CMdaAudioOutputStream> stream(streamFactory.create());
EffectParameter param(
/* parameterId */ AbstractAudioEffect::ParameterEnable,
/* name */ tr("Enabled"),
/* hints */ EffectParameter::ToggledHint,
/* defaultValue */ QVariant(bool(true)));
data.m_parameters.append(param);
data.m_supported = BackendNode::getParameters(stream.data(),
data.m_parameters);
if (data.m_supported) {
const QString description = QCoreApplication::translate
("Phonon::MMF::EffectFactory", BackendNode::description());
data.m_descriptions.insert("name", description);
data.m_descriptions.insert("description", description);
data.m_descriptions.insert("available", true);
}
// Sanity check to ensure that all parameter IDs are unique
QSet<int> ids;
foreach (param, data.m_parameters) {
Q_ASSERT_X(ids.find(param.id()) == ids.end(), Q_FUNC_INFO,
"Parameter list contains duplicates");
ids.insert(param.id());
}
return data;
}
const EffectFactory::EffectData& EffectFactory::data(Type type) const
{
QHash<Type, EffectData>::const_iterator i = m_effectData.find(type);
Q_ASSERT_X(i != m_effectData.end(), Q_FUNC_INFO, "Effect data not found");
return i.value();
}
QT_END_NAMESPACE
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