Implemented stereo widening effect in Phonon MMF backend

Task-number: QTBUG-4659
Reviewed-by: Espen Riskedal

3 files changed, 161 insertions, 1 deletions

diff --git a/src/3rdparty/phonon/mmf/effectfactory.cpp b/src/3rdparty/phonon/mmf/effectfactory.cpp
index ef2ddf7..081f6a3 100644
--- a/src/3rdparty/phonon/mmf/effectfactory.cpp
+++ b/src/3rdparty/phonon/mmf/effectfactory.cpp
@@ -25,6 +25,7 @@ along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include "bassboost.h"
 #include "environmentalreverb.h"
 #include "loudness.h"
+#include "stereowidening.h"
 
 #include "effectfactory.h"
 
@@ -80,12 +81,14 @@ AbstractAudioEffect *EffectFactory::createAudioEffect(Type type,
     case TypeLoudness:
         effect = new Loudness(parent, parameters);
         break;
+    case TypeStereoWidening:
+        effect = new StereoWidening(parent, parameters);
+        break;
 
     // Not implemented
     case TypeDistanceAttenuation:
     case TypeListenerOrientation:
     case TypeSourceOrientation:
-    case TypeStereoWidening:
     // Fall through
     default:
         Q_ASSERT_X(false, Q_FUNC_INFO, "Unknown effect");
@@ -137,6 +140,7 @@ void EffectFactory::initialize()
     INITIALIZE_EFFECT(BassBoost)
     INITIALIZE_EFFECT(EnvironmentalReverb)
     INITIALIZE_EFFECT(Loudness)
+    INITIALIZE_EFFECT(StereoWidening)
 
     m_initialized = true;
 }
diff --git a/src/3rdparty/phonon/mmf/stereowidening.cpp b/src/3rdparty/phonon/mmf/stereowidening.cpp
new file mode 100644
index 0000000..4fee1aa
--- /dev/null
+++ b/src/3rdparty/phonon/mmf/stereowidening.cpp
@@ -0,0 +1,94 @@
+/*  This file is part of the KDE project.
+
+Copyright (C) 2009 Nokia Corporation 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 <StereoWideningBase.h>
+#include "stereowidening.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace Phonon;
+using namespace Phonon::MMF;
+
+// Define functions which depend on concrete native effect class name
+PHONON_MMF_DEFINE_EFFECT_FUNCTIONS(StereoWidening)
+
+/*! \class MMF::StereoWidening
+  \internal
+*/
+
+StereoWidening::StereoWidening(QObject *parent, const QList<EffectParameter>& parameters)
+    :   AbstractAudioEffect::AbstractAudioEffect(parent, parameters)
+{
+
+}
+
+void StereoWidening::parameterChanged(const EffectParameter &param,
+                                 const QVariant &value)
+{
+    Q_ASSERT_X(param.id() == 0, Q_FUNC_INFO, "Invalid parameter ID");
+
+    const qreal externalLevel = value.toReal();
+    const int internalLevel = param.toInternalValue(externalLevel);
+
+    TRAPD(err, concreteEffect()->SetStereoWideningLevelL(internalLevel));
+
+    // TODO: handle audio effect errors
+    Q_UNUSED(err);
+}
+
+//-----------------------------------------------------------------------------
+// Static functions
+//-----------------------------------------------------------------------------
+
+const char* StereoWidening::description()
+{
+    return "Stereo widening";
+}
+
+bool StereoWidening::getParameters(CMdaAudioOutputStream *stream,
+    QList<EffectParameter> &parameters)
+{
+    bool supported = false;
+
+    QScopedPointer<CStereoWidening> effect;
+    TRAPD(err, effect.reset(CStereoWidening::NewL(*stream)));
+
+    if (KErrNone == err) {
+        supported = true;
+
+        const qreal defaultValue =
+            Phonon::MMF::EffectParameter::toExternalValue
+                (effect->StereoWideningLevel(), 0, 100);
+
+        EffectParameter param(
+             /* parameterId */        0,
+             /* name */               tr("Level (%)"),
+             /* hints */              EffectParameter::IntegerHint,
+             /* defaultValue */       QVariant(defaultValue),
+             /* minimumValue */       QVariant(qreal(-1.0)),
+             /* maximumValue */       QVariant(qreal(+1.0)));
+
+        param.setInternalRange(0, 100);
+        parameters.append(param);
+    }
+
+    return supported;
+}
+
+QT_END_NAMESPACE
+
diff --git a/src/3rdparty/phonon/mmf/stereowidening.h b/src/3rdparty/phonon/mmf/stereowidening.h
new file mode 100644
index 0000000..249c279
--- /dev/null
+++ b/src/3rdparty/phonon/mmf/stereowidening.h
@@ -0,0 +1,62 @@
+/*  This file is part of the KDE project.
+
+Copyright (C) 2009 Nokia Corporation 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/>.
+
+*/
+
+#ifndef PHONON_MMF_STEREOWIDENING_H
+#define PHONON_MMF_STEREOWIDENING_H
+
+#include "abstractaudioeffect.h"
+
+class CStereoWidening;
+
+QT_BEGIN_NAMESPACE
+
+namespace Phonon
+{
+namespace MMF
+{
+/**
+ * @short A "bass boost" effect.
+ */
+class StereoWidening : public AbstractAudioEffect
+{
+    Q_OBJECT
+public:
+    StereoWidening(QObject *parent, const QList<EffectParameter>& parameters);
+
+    // Static interface required by EffectFactory
+    static const char* description();
+    static bool getParameters(CMdaAudioOutputStream *stream,
+        QList<EffectParameter>& parameters);
+
+protected:
+    // AbstractAudioEffect
+    virtual void createEffect(AudioPlayer::NativePlayer *player);
+    virtual void parameterChanged(const EffectParameter &param,
+                                  const QVariant &value);
+
+private:
+    CStereoWidening *concreteEffect();
+
+};
+}
+}
+
+QT_END_NAMESPACE
+
+#endif
+