Don't use integers to describe volume internally in QSoundEffect.

The public api takes floating point values and so does most of the back-
ends. Conversion should be done in the back-ends that expect other value
types to avoid unnecessary float -> int -> float conversions.

Change-Id: I0ee1bfbe350f985294c20f897ffa3bd55288b4c9
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

src/multimedia/audio/qsoundeffect.cpp

@@ -265,7 +265,7 @@ int QSoundEffect::loopsRemaining() const
  */
 qreal QSoundEffect::volume() const
 {
-    return qreal(d->volume()) / 100;
+    return d->volume();
 }
 
 /*!
@@ -273,15 +273,15 @@ qreal QSoundEffect::volume() const
  */
 void QSoundEffect::setVolume(qreal volume)
 {
-    if (volume < 0 || volume > 1) {
+    if (volume < qreal(0.0) || volume > qreal(1.0)) {
         qWarning("SoundEffect: volume should be between 0.0 and 1.0");
         return;
     }
-    int iVolume = qRound(volume * 100);
+
-    if (d->volume() == iVolume)
+    if (qFuzzyCompare(d->volume(), volume))
         return;
 
-    d->setVolume(iVolume);
+    d->setVolume(volume);
 }
 
 /*!

src/multimedia/audio/qsoundeffect_pulse_p.cpp

@@ -382,7 +382,7 @@ QSoundEffectPrivate::QSoundEffectPrivate(QObject* parent):
     m_muted(false),
     m_playQueued(false),
     m_stopping(false),
-    m_volume(100),
+    m_volume(1.0),
     m_loopCount(1),
     m_runningCount(0),
     m_reloadCategory(false),
@@ -517,12 +517,12 @@ void QSoundEffectPrivate::setLoopCount(int loopCount)
     m_loopCount = loopCount;
 }
 
-int QSoundEffectPrivate::volume() const
+qreal QSoundEffectPrivate::volume() const
 {
     return m_volume;
 }
 
-void QSoundEffectPrivate::setVolume(int volume)
+void QSoundEffectPrivate::setVolume(qreal volume)
 {
     m_volume = volume;
     emit volumeChanged();
@@ -537,7 +537,7 @@ void QSoundEffectPrivate::updateVolume()
     pa_cvolume volume;
     volume.channels = m_pulseSpec.channels;
     if (pulseDaemon()->context())
-        pa_operation_unref(pa_context_set_sink_input_volume(pulseDaemon()->context(), m_sinkInputId, pulseDaemon()->calcVolume(&volume, m_volume), setvolume_callback, m_ref->getRef()));
+        pa_operation_unref(pa_context_set_sink_input_volume(pulseDaemon()->context(), m_sinkInputId, pulseDaemon()->calcVolume(&volume, qRound(m_volume * 100)), setvolume_callback, m_ref->getRef()));
     Q_ASSERT(pa_cvolume_valid(&volume));
 #ifdef QT_PA_DEBUG
     qDebug() << this << "updateVolume =" << pa_cvolume_max(&volume);

src/multimedia/audio/qsoundeffect_pulse_p.h

@@ -80,8 +80,8 @@ public:
     int loopCount() const;
     int loopsRemaining() const;
     void setLoopCount(int loopCount);
-    int volume() const;
+    qreal volume() const;
-    void setVolume(int volume);
+    void setVolume(qreal volume);
     bool isMuted() const;
     void setMuted(bool muted);
     bool isLoaded() const;
@@ -153,7 +153,7 @@ private:
     bool    m_muted;
     bool    m_playQueued;
     bool    m_stopping;
-    int     m_volume;
+    qreal     m_volume;
     int     m_loopCount;
     int     m_runningCount;
     QUrl    m_source;

src/multimedia/audio/qsoundeffect_qaudio_p.cpp

@@ -175,20 +175,20 @@ void QSoundEffectPrivate::setLoopCount(int loopCount)
     d->m_runningCount = loopCount;
 }
 
-int QSoundEffectPrivate::volume() const
+qreal QSoundEffectPrivate::volume() const
 {
     if (d->m_audioOutput && !d->m_muted)
-        return d->m_audioOutput->volume()*100.0f;
+        return d->m_audioOutput->volume();
 
     return d->m_volume;
 }
 
-void QSoundEffectPrivate::setVolume(int volume)
+void QSoundEffectPrivate::setVolume(qreal volume)
 {
     d->m_volume = volume;
 
     if (d->m_audioOutput && !d->m_muted)
-        d->m_audioOutput->setVolume(volume/100.0f);
+        d->m_audioOutput->setVolume(volume);
 
     emit volumeChanged();
 }
@@ -203,7 +203,7 @@ void QSoundEffectPrivate::setMuted(bool muted)
     if (muted && d->m_audioOutput)
         d->m_audioOutput->setVolume(0);
     else if (!muted && d->m_audioOutput && d->m_muted)
-        d->m_audioOutput->setVolume(d->m_volume/100.0f);
+        d->m_audioOutput->setVolume(d->m_volume);
 
     d->m_muted = muted;
     emit mutedChanged();
@@ -314,7 +314,7 @@ PrivateSoundSource::PrivateSoundSource(QSoundEffectPrivate* s):
     m_audioOutput(0),
     m_sample(0),
     m_muted(false),
-    m_volume(100),
+    m_volume(1.0),
     m_sampleReady(false),
     m_offset(0)
 {
@@ -337,7 +337,7 @@ void PrivateSoundSource::sampleReady()
         m_audioOutput = new QAudioOutput(m_sample->format());
         connect(m_audioOutput,SIGNAL(stateChanged(QAudio::State)), this, SLOT(stateChanged(QAudio::State)));
         if (!m_muted)
-            m_audioOutput->setVolume(m_volume/100.0f);
+            m_audioOutput->setVolume(m_volume);
         else
             m_audioOutput->setVolume(0);
     }

src/multimedia/audio/qsoundeffect_qaudio_p.h

@@ -88,7 +88,7 @@ private:
     QAudioOutput   *m_audioOutput;
     QSample        *m_sample;
     bool           m_muted;
-    int            m_volume;
+    qreal          m_volume;
     bool           m_sampleReady;
     qint64         m_offset;
     QString        m_category;
@@ -113,8 +113,8 @@ public:
     int loopCount() const;
     int loopsRemaining() const;
     void setLoopCount(int loopCount);
-    int volume() const;
+    qreal volume() const;
-    void setVolume(int volume);
+    void setVolume(qreal volume);
     bool isMuted() const;
     void setMuted(bool muted);
     bool isLoaded() const;