Refactored code for audio engine to allow dynamic object creation

QDeclarativeSound, QDeclarativeAudioSample, QDeclarativeAudioCategory
and QDeclarativeAttenuationModel can now be dynamically added to
AudioEngine instance or declared inside AudioEngine object definition.

QDeclarativePlayVariation can now be dynamically added to Sound
instance or declared inside Sound object definition.

Change-Id: If4c2e16895a71eb71ded1998c107360698f8ac7f
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

src/imports/audioengine/qdeclarative_playvariation_p.h

@@ -35,17 +35,16 @@
 #define QDECLARATIVEPLAYVARIATION_P_H
 
 #include <QtQml/qqml.h>
-#include <QtQml/qqmlcomponent.h>
 
 QT_BEGIN_NAMESPACE
 
 class QDeclarativeAudioSample;
 class QSoundInstance;
+class QDeclarativeAudioEngine;
 
-class QDeclarativePlayVariation : public QObject, public QQmlParserStatus
+class QDeclarativePlayVariation : public QObject
 {
     Q_OBJECT
-    Q_INTERFACES(QQmlParserStatus)
     Q_PROPERTY(QString sample READ sample WRITE setSample)
     Q_PROPERTY(bool looping READ isLooping WRITE setLooping)
     Q_PROPERTY(qreal maxGain READ maxGain WRITE setMaxGain)
@@ -57,9 +56,6 @@ public:
     QDeclarativePlayVariation(QObject *parent = 0);
     ~QDeclarativePlayVariation();
 
-    void classBegin();
-    void componentComplete();
-
     QString sample() const;
     void setSample(const QString& sample);
 
@@ -82,9 +78,10 @@ public:
 
     void applyParameters(QSoundInstance *soundInstance);
 
+    void setEngine(QDeclarativeAudioEngine *engine);
+
 private:
     Q_DISABLE_COPY(QDeclarativePlayVariation);
-    bool m_complete;
     QString m_sample;
     bool m_looping;
     qreal m_maxGain;
@@ -92,6 +89,7 @@ private:
     qreal m_maxPitch;
     qreal m_minPitch;
     QDeclarativeAudioSample *m_sampleObject;
+    QDeclarativeAudioEngine *m_engine;
 };
 
 QT_END_NAMESPACE