diff -r 000000000000 -r 1918ee327afb src/3rdparty/phonon/ds9/volumeeffect.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/phonon/ds9/volumeeffect.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,285 @@
+/*  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 "volumeeffect.h"
+#include "qbasefilter.h"
+#include "qmeminputpin.h"
+
+#include <QtCore/qmath.h> //for sqrt
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_PHONON_VOLUMEFADEREFFECT
+
+
+namespace Phonon
+{
+    namespace DS9
+    {
+        /**************************************************************************
+        * curve functions
+        *************************************************************************/
+
+        static qreal curveValueFadeIn3dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * sqrt(completed));
+        }
+        static qreal curveValueFadeOut3dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * (1.0 - sqrt(1.0 - completed)));
+        }
+        // in == out for a linear fade
+        static qreal curveValueFade6dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * completed);
+        }
+        static qreal curveValueFadeIn9dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * pow(completed, 1.5));
+        }
+        static qreal curveValueFadeOut9dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * (1.0 - pow(1.0 - completed, 1.5)));
+        }
+        static qreal curveValueFadeIn12dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            return (fadeStart + fadeDiff * completed * completed);
+        }
+        static qreal curveValueFadeOut12dB(const qreal fadeStart, const qreal fadeDiff, const qreal completed)
+        {
+            const qreal x = 1.0 - completed;
+            return (fadeStart + fadeDiff * (1.0 - x * x));
+        }
+
+        static const QVector<AM_MEDIA_TYPE> audioMediaType()
+        {
+            QVector<AM_MEDIA_TYPE> ret;
+            AM_MEDIA_TYPE mt = { MEDIATYPE_Audio, MEDIASUBTYPE_PCM, 1, 0, 1, GUID_NULL, 0, 0, 0};
+            ret << mt;
+            return ret;
+        }
+
+        class VolumeMemInputPin : public QMemInputPin
+        {
+        public:
+            VolumeMemInputPin(QBaseFilter *parent, const QVector<AM_MEDIA_TYPE> &mt, QPin *output) : QMemInputPin(parent, mt, true /*transform*/, output)
+            {
+            }
+
+            ~VolumeMemInputPin()
+            {
+            }
+
+            STDMETHODIMP NotifyAllocator(IMemAllocator *alloc, BOOL b)
+            {
+                ALLOCATOR_PROPERTIES prop;
+                HRESULT hr = alloc->GetProperties(&prop);
+                if (SUCCEEDED(hr) && prop.cBuffers > 1) {
+                    //this allows to reduce the latency for sound
+                    //the problem is that too low numbers makes the whole thing fail...
+                    ALLOCATOR_PROPERTIES actual;
+                    prop.cBuffers = 1;
+                    alloc->SetProperties(&prop, &actual);
+                }
+                return QMemInputPin::NotifyAllocator(alloc, b);
+            }
+
+        };
+
+        class VolumeMemOutputPin : public QPin
+        {
+        public:
+            VolumeMemOutputPin(QBaseFilter *parent, const QVector<AM_MEDIA_TYPE> &mt) : QPin(parent, PINDIR_OUTPUT, mt)
+            {
+            }
+
+            ~VolumeMemOutputPin()
+            {
+            }
+
+        };
+
+        class VolumeEffectFilter : public QBaseFilter
+        {
+        public:
+            VolumeEffectFilter(VolumeEffect *);
+
+            //reimplementation
+            virtual HRESULT processSample(IMediaSample *);
+
+        private:
+            void treatOneSamplePerChannel(BYTE **buffer, int sampleSize, int channelCount, int frequency);
+
+            QMemInputPin *m_input;
+            QPin *m_output;
+            VolumeEffect *m_volumeEffect;
+        };
+
+        VolumeEffectFilter::VolumeEffectFilter(VolumeEffect *ve) : QBaseFilter(CLSID_NULL),
+            m_volumeEffect(ve)
+        {
+            QVector<AM_MEDIA_TYPE> mt;
+
+            //creating the output
+            m_output = new VolumeMemOutputPin(this, mt);
+
+            //then creating the input
+            mt << audioMediaType();
+            m_input = new VolumeMemInputPin(this, mt, m_output);
+        }
+
+        void VolumeEffectFilter::treatOneSamplePerChannel(BYTE **buffer, int sampleSize, int channelCount, int frequency)
+        {
+            float volume = m_volumeEffect->volume();
+            if (m_volumeEffect->m_fading) {
+                const qreal lastSample = m_volumeEffect->m_fadeDuration * frequency / 1000;
+                const qreal completed = qreal(m_volumeEffect->m_fadeSamplePosition++) / lastSample;
+
+                if (qFuzzyCompare(completed, qreal(1.))) {
+                    m_volumeEffect->setVolume(m_volumeEffect->m_targetVolume);
+                    m_volumeEffect->m_fading = false; //we end the fading effect
+                } else {
+                    volume = m_volumeEffect->m_fadeCurveFn(m_volumeEffect->m_initialVolume, 
+                        m_volumeEffect->m_targetVolume - m_volumeEffect->m_initialVolume,
+                        completed);
+                }
+            }
+
+            for(int c = 0; c < channelCount; ++c) {
+                switch (sampleSize)
+                {
+                case 2:
+                    {
+                        short *shortBuffer = reinterpret_cast<short*>(*buffer);
+                        *shortBuffer *= qRound(volume);
+                    }
+                    break;
+                case 1:
+                    **buffer *= qRound(volume);
+                    break;
+                default:
+                    break;
+                }
+
+                *buffer += sampleSize;
+            }
+        }
+
+        HRESULT VolumeEffectFilter::processSample(IMediaSample * ms)
+        {
+            BYTE *buffer = 0;
+            ms->GetPointer(&buffer);
+            if (buffer) {
+                const AM_MEDIA_TYPE &mt = m_output->connectedType();
+                if (mt.formattype != FORMAT_WaveFormatEx) {
+                    return VFW_E_INVALIDMEDIATYPE;
+                }
+                WAVEFORMATEX *format = reinterpret_cast<WAVEFORMATEX*>(mt.pbFormat);
+                const int channelCount = format->nChannels;
+                const int sampleSize = format->wBitsPerSample / 8; //...in bytes
+
+
+                const BYTE *end = buffer + ms->GetActualDataLength();
+                while (buffer < end) {
+                    treatOneSamplePerChannel(&buffer, sampleSize, channelCount, format->nSamplesPerSec);
+                }
+            }
+
+            return S_OK;
+        }
+
+        VolumeEffect::VolumeEffect(QObject *parent) : Effect(parent), 
+            m_volume(1), m_fadeCurve(Phonon::VolumeFaderEffect::Fade3Decibel),
+            m_fading(false), m_initialVolume(0), m_targetVolume(0), m_fadeDuration(0),
+            m_fadeSamplePosition(0)
+        {
+            //creation of the effects
+            for(int i = 0; i < FILTER_COUNT; ++i) {
+                VolumeEffectFilter *f = new VolumeEffectFilter(this);
+                m_filters[i] = Filter(f);
+            }
+        }
+
+        float VolumeEffect::volume() const
+        {
+            return m_volume;
+        }
+
+        void VolumeEffect::setVolume(float newVolume)
+        {
+            m_volume = newVolume;
+        }
+
+        Phonon::VolumeFaderEffect::FadeCurve VolumeEffect::fadeCurve() const
+        {
+            return m_fadeCurve;
+        }
+
+        void VolumeEffect::setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve curve)
+        {
+            m_fadeCurve = curve;
+        }
+
+
+        void VolumeEffect::fadeTo(float vol, int duration)
+        {
+            m_fading = true; //will be set back to false when fading is finished
+            m_targetVolume = vol;
+            m_fadeSamplePosition = 0;
+            m_initialVolume = m_volume;
+            m_fadeDuration = duration;
+
+            //in or out?
+            const bool in = vol > m_volume;
+
+            switch(m_fadeCurve)
+            {
+            case Phonon::VolumeFaderEffect::Fade6Decibel:
+                m_fadeCurveFn = curveValueFade6dB;
+                break;
+            case Phonon::VolumeFaderEffect::Fade9Decibel:
+                if (in) {
+                    m_fadeCurveFn = curveValueFadeIn9dB;
+                } else {
+                    m_fadeCurveFn = curveValueFadeOut9dB;
+                }
+                break;
+            case Phonon::VolumeFaderEffect::Fade12Decibel:
+                if (in) {
+                    m_fadeCurveFn = curveValueFadeIn12dB;
+                } else {
+                    m_fadeCurveFn = curveValueFadeOut12dB;
+                }
+                break;
+            case Phonon::VolumeFaderEffect::Fade3Decibel:
+            default:
+                if (in) {
+                    m_fadeCurveFn = curveValueFadeIn3dB;
+                } else {
+                    m_fadeCurveFn = curveValueFadeOut3dB;
+                }
+                break;
+            }
+        }
+    }
+}
+
+#endif //QT_NO_PHONON_VOLUMEFADEREFFECT
+
+QT_END_NAMESPACE
+
+#include "moc_volumeeffect.cpp"