Added volume property to QMediaRecorder

Change-Id: I19f727107651c9f640ca1c010a3764f05aef8820
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/multimedia/controls/qmediarecordercontrol.cpp

@@ -159,6 +159,17 @@ QMediaRecorderControl::~QMediaRecorderControl()
     Sets the \a muted state of a media recorder.
 */
 
+/*!
+    \fn qreal QMediaRecorderControl::volume() const
+
+    Returns the linear audio gain of media recorder.
+*/
+
+/*!
+    \fn void QMediaRecorderControl::setVolume(qreal gain)
+
+    Sets the linear audio \a gain of a media recorder.
+*/
 
 /*!
     \fn void QMediaRecorderControl::stateChanged(QMediaRecorder::State state)
@@ -187,6 +198,12 @@ QMediaRecorderControl::~QMediaRecorderControl()
     Signals that the \a muted state of a media recorder has changed.
 */
 
+/*!
+    \fn void QMediaRecorderControl::volume(qreal gain)
+
+    Signals that the audio \a gain value has changed.
+*/
+
 /*!
     \fn void QMediaRecorderControl::actualLocationChanged(const QUrl &location)
 

src/multimedia/controls/qmediarecordercontrol.h

@@ -75,6 +75,7 @@ public:
     virtual qint64 duration() const = 0;
 
     virtual bool isMuted() const = 0;
+    virtual qreal volume() const = 0;
 
     virtual void applySettings() = 0;
 
@@ -83,12 +84,14 @@ Q_SIGNALS:
     void statusChanged(QMediaRecorder::Status status);
     void durationChanged(qint64 position);
     void mutedChanged(bool muted);
+    void volumeChanged(qreal volume);
     void actualLocationChanged(const QUrl &location);
     void error(int error, const QString &errorString);
 
 public Q_SLOTS:
     virtual void setState(QMediaRecorder::State state) = 0;
     virtual void setMuted(bool muted) = 0;
+    virtual void setVolume(qreal volume) = 0;
 
 protected:
     QMediaRecorderControl(QObject* parent = 0);

src/multimedia/recording/qmediarecorder.cpp

@@ -285,6 +285,9 @@ bool QMediaRecorder::setMediaObject(QMediaObject *object)
             disconnect(d->control, SIGNAL(mutedChanged(bool)),
                        this, SIGNAL(mutedChanged(bool)));
 
+            disconnect(d->control, SIGNAL(volumeChanged(qreal)),
+                       this, SIGNAL(volumeChanged(qreal)));
+
             disconnect(d->control, SIGNAL(durationChanged(qint64)),
                        this, SIGNAL(durationChanged(qint64)));
 
@@ -388,6 +391,9 @@ bool QMediaRecorder::setMediaObject(QMediaObject *object)
                 connect(d->control, SIGNAL(mutedChanged(bool)),
                         this, SIGNAL(mutedChanged(bool)));
 
+                connect(d->control, SIGNAL(volumeChanged(qreal)),
+                        this, SIGNAL(volumeChanged(qreal)));
+
                 connect(d->control, SIGNAL(durationChanged(qint64)),
                         this, SIGNAL(durationChanged(qint64)));
 
@@ -552,6 +558,26 @@ void QMediaRecorder::setMuted(bool muted)
         d->control->setMuted(muted);
 }
 
+/*!
+    \property QMediaRecorder::volume
+
+    \brief the linear audio gain of media recorder.
+*/
+
+qreal QMediaRecorder::volume() const
+{
+    return d_func()->control ? d_func()->control->volume() : 1.0;
+}
+
+
+void QMediaRecorder::setVolume(qreal volume)
+{
+    Q_D(QMediaRecorder);
+
+    if (d->control)
+        d->control->setVolume(volume);
+}
+
 /*!
     Returns a list of supported container formats.
 */

src/multimedia/recording/qmediarecorder.h

@@ -81,6 +81,7 @@ class Q_MULTIMEDIA_EXPORT QMediaRecorder : public QObject, public QMediaBindable
     Q_PROPERTY(QUrl outputLocation READ outputLocation WRITE setOutputLocation)
     Q_PROPERTY(QUrl actualLocation READ actualLocation NOTIFY actualLocationChanged)
     Q_PROPERTY(bool muted READ isMuted WRITE setMuted NOTIFY mutedChanged)
+    Q_PROPERTY(qreal volume READ volume WRITE setVolume NOTIFY volumeChanged)
     Q_PROPERTY(bool metaDataAvailable READ isMetaDataAvailable NOTIFY metaDataAvailableChanged)
     Q_PROPERTY(bool metaDataWritable READ isMetaDataWritable NOTIFY metaDataWritableChanged)
 public:
@@ -133,6 +134,7 @@ public:
     qint64 duration() const;
 
     bool isMuted() const;
+    qreal volume() const;
 
     QStringList supportedContainers() const;
     QString containerDescription(const QString &format) const;
@@ -176,12 +178,14 @@ public Q_SLOTS:
     void pause();
     void stop();
     void setMuted(bool muted);
+    void setVolume(qreal volume);
 
 Q_SIGNALS:
     void stateChanged(QMediaRecorder::State state);
     void statusChanged(QMediaRecorder::Status status);
     void durationChanged(qint64 duration);
     void mutedChanged(bool muted);
+    void volumeChanged(qreal volume);
     void actualLocationChanged(const QUrl &location);
 
     void error(QMediaRecorder::Error error);