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0001 /* This file is part of the KDE project. 0002 * 0003 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). 0004 * Copyright (C) 2013 Martin Sandsmark <martin.sandsmark@kde.org> 0005 * 0006 * This library is free software: you can redistribute it and/or modify 0007 * it under the terms of the GNU Lesser General Public License as published by 0008 * the Free Software Foundation, either version 2.1 or 3 of the License. 0009 * 0010 * This library is distributed in the hope that it will be useful, 0011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 0012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0013 * GNU Lesser General Public License for more details. 0014 * 0015 * You should have received a copy of the GNU Lesser General Public License 0016 * along with this library. If not, see <http://www.gnu.org/licenses/>. 0017 */ 0018 0019 #include "volumefadereffect.h" 0020 #include <mediaplayer.h> 0021 0022 #include "utils/debug.h" 0023 0024 #include <QtCore/QTimeLine> 0025 0026 #ifndef QT_NO_PHONON_VOLUMEFADEREFFECT 0027 namespace Phonon 0028 { 0029 namespace VLC 0030 { 0031 VolumeFaderEffect::VolumeFaderEffect(QObject *parent) 0032 : QObject(parent) 0033 , SinkNode() 0034 , m_fadeCurve(Phonon::VolumeFaderEffect::Fade3Decibel) 0035 , m_fadeFromVolume(0) 0036 , m_fadeToVolume(0) 0037 { 0038 m_fadeTimeline = new QTimeLine(1000, this); 0039 connect(m_fadeTimeline, SIGNAL(valueChanged(qreal)), this, SLOT(slotSetVolume(qreal))); 0040 } 0041 0042 VolumeFaderEffect::~VolumeFaderEffect() 0043 { 0044 } 0045 0046 float VolumeFaderEffect::volume() const 0047 { 0048 Q_ASSERT(m_player); 0049 return m_player->audioVolume() / 100.0f; 0050 } 0051 0052 void VolumeFaderEffect::slotSetVolume(qreal volume) 0053 { 0054 float gstVolume = m_fadeFromVolume + (volume * (m_fadeToVolume - m_fadeFromVolume)); 0055 setVolumeInternal(gstVolume); 0056 } 0057 0058 Phonon::VolumeFaderEffect::FadeCurve VolumeFaderEffect::fadeCurve() const 0059 { 0060 return m_fadeCurve; 0061 } 0062 0063 void VolumeFaderEffect::setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve pFadeCurve) 0064 { 0065 m_fadeCurve = pFadeCurve; 0066 QEasingCurve fadeCurve; 0067 switch(pFadeCurve) { 0068 case Phonon::VolumeFaderEffect::Fade3Decibel: 0069 fadeCurve = QEasingCurve::InQuad; 0070 break; 0071 case Phonon::VolumeFaderEffect::Fade6Decibel: 0072 fadeCurve = QEasingCurve::Linear; 0073 break; 0074 case Phonon::VolumeFaderEffect::Fade9Decibel: 0075 fadeCurve = QEasingCurve::OutCubic; 0076 break; 0077 case Phonon::VolumeFaderEffect::Fade12Decibel: 0078 fadeCurve = QEasingCurve::OutQuart; 0079 break; 0080 } 0081 m_fadeTimeline->setEasingCurve(fadeCurve); 0082 } 0083 0084 void VolumeFaderEffect::fadeTo(float targetVolume, int fadeTime) 0085 { 0086 Q_ASSERT(m_player); 0087 abortFade(); 0088 m_fadeToVolume = targetVolume; 0089 m_fadeFromVolume = m_player->audioVolume() / 100.0f; 0090 0091 // Don't call QTimeLine::setDuration() with zero. 0092 // It is not supported and breaks fading. 0093 if (fadeTime <= 0) { 0094 debug() << "Called with retarded fade time " << fadeTime; 0095 setVolumeInternal(targetVolume); 0096 return; 0097 } 0098 0099 m_fadeTimeline->setDuration(fadeTime); 0100 m_fadeTimeline->start(); 0101 } 0102 0103 void VolumeFaderEffect::setVolume(float v) 0104 { 0105 abortFade(); 0106 setVolumeInternal(v); 0107 } 0108 0109 void VolumeFaderEffect::abortFade() 0110 { 0111 m_fadeTimeline->stop(); 0112 } 0113 0114 void VolumeFaderEffect::setVolumeInternal(float v) 0115 { 0116 if (m_player) 0117 m_player->setAudioFade(v); 0118 else 0119 warning() << Q_FUNC_INFO << this << "no m_player set"; 0120 } 0121 0122 } 0123 } //namespace Phonon::VLC 0124 0125 #endif //QT_NO_PHONON_VOLUMEFADEREFFECT 0126 #include "moc_volumefadereffect.cpp" 0127