Fix crash related to audio equalizer.

The constructor initializer relied on member variables.

Task-number: QTBUG-4689
(cherry picked from commit 54645071fad98b46a44d88b50095dc21ff63fff6)

2 files changed, 14 insertions, 17 deletions

diff --git a/src/3rdparty/phonon/mmf/audioequalizer.cpp b/src/3rdparty/phonon/mmf/audioequalizer.cpp
index c691e1e..7cc9bc7 100644
--- a/src/3rdparty/phonon/mmf/audioequalizer.cpp
+++ b/src/3rdparty/phonon/mmf/audioequalizer.cpp
@@ -36,18 +36,16 @@ void AudioEqualizer::parameterChanged(const int pid,
 {
     // There is no way to return an error from this function, so we just
     // have to trap and ignore exceptions.
-    TRAP_IGNORE(eq()->SetBandLevelL(pid, value.toInt()));
+    TRAP_IGNORE(static_cast<CAudioEqualizer *>(m_effect.data())->SetBandLevelL(pid, value.toInt()));
 }
 
 bool AudioEqualizer::activateOn(CPlayerType *player)
 {
-    m_effect.reset(CAudioEqualizer::NewL(*player));
-    return true;
-}
+    CAudioEqualizer *ptr = 0;
+    QT_TRAP_THROWING(ptr = CAudioEqualizer::NewL(*player));
+    m_effect.reset(ptr);
 
-CAudioEqualizer *AudioEqualizer::eq() const
-{
-    return static_cast<CAudioEqualizer *>(m_effect.data());
+    return true;
 }
 
 QList<EffectParameter> AudioEqualizer::createParams()
@@ -57,18 +55,21 @@ QList<EffectParameter> AudioEqualizer::createParams()
     // We temporarily create an AudioPlayer, and run the effect on it, so
     // we can extract the readonly data we need.
     AudioPlayer dummyPlayer;
-    activateOn(dummyPlayer.player());
+
+    CAudioEqualizer *eqPtr = 0;
+    QT_TRAP_THROWING(eqPtr = CAudioEqualizer::NewL(*dummyPlayer.player());)
+    QScopedPointer<CAudioEqualizer> e(eqPtr);
 
     TInt32 dbMin;
     TInt32 dbMax;
-    eq()->DbLevelLimits(dbMin, dbMax);
+    e->DbLevelLimits(dbMin, dbMax);
 
-    const int bandCount = eq()->NumberOfBands();
+    const int bandCount = e->NumberOfBands();
 
     for (int i = 0; i < bandCount; ++i) {
-        const qint32 hz = eq()->CenterFrequency(i);
+        const qint32 hz = e->CenterFrequency(i);
 
-        const qint32 defVol = eq()->BandLevel(i);
+        const qint32 defVol = e->BandLevel(i);
 
         retval.append(EffectParameter(i,
                                       tr("Frequency band, %1 Hz").arg(hz),
@@ -80,10 +81,7 @@ QList<EffectParameter> AudioEqualizer::createParams()
                                       QString()));
     }
 
-    m_effect.reset();
-
     return retval;
 }
 
 QT_END_NAMESPACE
-
diff --git a/src/3rdparty/phonon/mmf/audioequalizer.h b/src/3rdparty/phonon/mmf/audioequalizer.h
index 6415411..d4c8165 100644
--- a/src/3rdparty/phonon/mmf/audioequalizer.h
+++ b/src/3rdparty/phonon/mmf/audioequalizer.h
@@ -49,8 +49,7 @@ protected:
     virtual bool activateOn(CPlayerType *player);
 
 private:
-    inline CAudioEqualizer *eq() const;
-    QList<EffectParameter> createParams();
+    static QList<EffectParameter> createParams();
     QScopedPointer<CAudioEqualizer> m_bassBoost;
 };
 }