Delayed creation of audio effect object until audio is initialized

When applying effects to an audio stream, we must ensure that the MMF
utility API (CMdaAudioPlayerUtility or CVideoPlayerUtility) instance has
loaded a controller before calling attempting to create a CAudioEffect-
derived object.  If the controller has not been loaded, construction of
the effect object will fail.  Even if we mitigate against this, calling
CAudioEffect::ApplyL() will only have an effect if there is a controller
object - or more precisely, a DevSound instance - on which to apply the
effect.

This patch delays construction of the effect object until the MediaObject
has transitioned out of the LoadingState, indicating that an underlying
DevSound instance will have been created.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/src/3rdparty/phonon/mmf/mediaobject.h b/src/3rdparty/phonon/mmf/mediaobject.h
index 7d330e7..c87d755 100644
--- a/src/3rdparty/phonon/mmf/mediaobject.h
+++ b/src/3rdparty/phonon/mmf/mediaobject.h
@@ -92,6 +92,7 @@ public Q_SLOTS:
     void switchToNextSource();
 
 Q_SIGNALS:
+    void abstractPlayerChanged(AbstractPlayer *player);
     void totalTimeChanged(qint64 length);
     void hasVideoChanged(bool hasVideo);
     void seekableChanged(bool seekable);