GStreamer: Add missing override and remove redundant virtual

Change-Id: I61997676d7f002e769de499b19cbea3d96876480
Reviewed-by: Yoann Lopes <yoann.lopes@qt.io>

36 files changed, 208 insertions, 208 deletions

diff --git a/src/gsttools/qgstreamervideowidget.cpp b/src/gsttools/qgstreamervideowidget.cpp
index 67f9a8fa7..792df4243 100644
--- a/src/gsttools/qgstreamervideowidget.cpp
+++ b/src/gsttools/qgstreamervideowidget.cpp
@@ -59,7 +59,7 @@ public:
 
     virtual ~QGstreamerVideoWidget() {}
 
-    QSize sizeHint() const
+    QSize sizeHint() const override
     {
         return m_nativeSize;
     }
@@ -84,7 +84,7 @@ public:
     }
 
 protected:
-    void paintEvent(QPaintEvent *)
+    void paintEvent(QPaintEvent *) override
     {
         paint_helper();
     }
diff --git a/src/multimedia/gsttools_headers/qgstbufferpoolinterface_p.h b/src/multimedia/gsttools_headers/qgstbufferpoolinterface_p.h
index 768f9c30d..e03da1ab5 100644
--- a/src/multimedia/gsttools_headers/qgstbufferpoolinterface_p.h
+++ b/src/multimedia/gsttools_headers/qgstbufferpoolinterface_p.h
@@ -96,11 +96,11 @@ public:
     explicit QGstBufferPoolPlugin(QObject *parent = 0);
     virtual ~QGstBufferPoolPlugin() {}
 
-    virtual bool isFormatSupported(const QVideoSurfaceFormat &format) const = 0;
-    virtual GstBuffer *takeBuffer(const QVideoSurfaceFormat &format, GstCaps *caps) = 0;
-    virtual void clear() = 0;
+    bool isFormatSupported(const QVideoSurfaceFormat &format) const override = 0;
+    GstBuffer *takeBuffer(const QVideoSurfaceFormat &format, GstCaps *caps) override = 0;
+    void clear() override = 0;
 
-    virtual QAbstractVideoBuffer::HandleType handleType() const = 0;
+    QAbstractVideoBuffer::HandleType handleType() const override = 0;
 
     /*!
       Build an QAbstractVideoBuffer instance from compatible GstBuffer.
@@ -108,7 +108,7 @@ public:
 
       This method is called from gstreamer video sink thread.
      */
-    virtual QAbstractVideoBuffer *prepareVideoBuffer(GstBuffer *buffer, int bytesPerLine) = 0;
+    QAbstractVideoBuffer *prepareVideoBuffer(GstBuffer *buffer, int bytesPerLine) override = 0;
 };
 
 QT_END_NAMESPACE
diff --git a/src/multimedia/gsttools_headers/qgstreameraudioinputselector_p.h b/src/multimedia/gsttools_headers/qgstreameraudioinputselector_p.h
index 9c5ce3052..1a961c6d9 100644
--- a/src/multimedia/gsttools_headers/qgstreameraudioinputselector_p.h
+++ b/src/multimedia/gsttools_headers/qgstreameraudioinputselector_p.h
@@ -63,13 +63,13 @@ public:
     QGstreamerAudioInputSelector(QObject *parent);
     ~QGstreamerAudioInputSelector();
 
-    QList<QString> availableInputs() const;
-    QString inputDescription(const QString& name) const;
-    QString defaultInput() const;
-    QString activeInput() const;
+    QList<QString> availableInputs() const override;
+    QString inputDescription(const QString &name) const override;
+    QString defaultInput() const override;
+    QString activeInput() const override;
 
 public Q_SLOTS:
-    void setActiveInput(const QString& name);
+    void setActiveInput(const QString &name) override;
 
 private:
     void update();
diff --git a/src/multimedia/gsttools_headers/qgstreameraudioprobecontrol_p.h b/src/multimedia/gsttools_headers/qgstreameraudioprobecontrol_p.h
index d3062c5ad..bacf8c71d 100644
--- a/src/multimedia/gsttools_headers/qgstreameraudioprobecontrol_p.h
+++ b/src/multimedia/gsttools_headers/qgstreameraudioprobecontrol_p.h
@@ -72,8 +72,8 @@ public:
     virtual ~QGstreamerAudioProbeControl();
 
 protected:
-    void probeCaps(GstCaps *caps);
-    bool probeBuffer(GstBuffer *buffer);
+    void probeCaps(GstCaps *caps) override;
+    bool probeBuffer(GstBuffer *buffer) override;
 
 private slots:
     void bufferProbed();
diff --git a/src/multimedia/gsttools_headers/qgstreamervideoinputdevicecontrol_p.h b/src/multimedia/gsttools_headers/qgstreamervideoinputdevicecontrol_p.h
index bc3d6703e..e1ac453c7 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideoinputdevicecontrol_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideoinputdevicecontrol_p.h
@@ -67,19 +67,19 @@ public:
     QGstreamerVideoInputDeviceControl(GstElementFactory *factory, QObject *parent);
     ~QGstreamerVideoInputDeviceControl();
 
-    int deviceCount() const;
+    int deviceCount() const override;
 
-    QString deviceName(int index) const;
-    QString deviceDescription(int index) const;
+    QString deviceName(int index) const override;
+    QString deviceDescription(int index) const override;
 
-    int defaultDevice() const;
-    int selectedDevice() const;
+    int defaultDevice() const override;
+    int selectedDevice() const override;
 
     static QString primaryCamera() { return tr("Main camera"); }
     static QString secondaryCamera() { return tr("Front camera"); }
 
 public Q_SLOTS:
-    void setSelectedDevice(int index);
+    void setSelectedDevice(int index) override;
 
 private:
     GstElementFactory *m_factory;
diff --git a/src/multimedia/gsttools_headers/qgstreamervideooverlay_p.h b/src/multimedia/gsttools_headers/qgstreamervideooverlay_p.h
index bed411475..f3066fad8 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideooverlay_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideooverlay_p.h
@@ -94,8 +94,8 @@ public:
     int saturation() const;
     void setSaturation(int saturation);
 
-    bool processSyncMessage(const QGstreamerMessage &message);
-    bool processBusMessage(const QGstreamerMessage &message);
+    bool processSyncMessage(const QGstreamerMessage &message) override;
+    bool processBusMessage(const QGstreamerMessage &message) override;
 
 Q_SIGNALS:
     void nativeVideoSizeChanged();
@@ -109,7 +109,7 @@ private:
     GstElement *findBestVideoSink() const;
     void setWindowHandle_helper(WId id);
     void updateIsActive();
-    void probeCaps(GstCaps *caps);
+    void probeCaps(GstCaps *caps) override;
     static void showPrerollFrameChanged(GObject *, GParamSpec *, QGstreamerVideoOverlay *);
 
     GstElement *m_videoSink;
diff --git a/src/multimedia/gsttools_headers/qgstreamervideoprobecontrol_p.h b/src/multimedia/gsttools_headers/qgstreamervideoprobecontrol_p.h
index 7520b7424..b599b0e78 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideoprobecontrol_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideoprobecontrol_p.h
@@ -72,8 +72,8 @@ public:
     explicit QGstreamerVideoProbeControl(QObject *parent);
     virtual ~QGstreamerVideoProbeControl();
 
-    void probeCaps(GstCaps *caps);
-    bool probeBuffer(GstBuffer *buffer);
+    void probeCaps(GstCaps *caps) override;
+    bool probeBuffer(GstBuffer *buffer) override;
 
     void startFlushing();
     void stopFlushing();
diff --git a/src/multimedia/gsttools_headers/qgstreamervideorenderer_p.h b/src/multimedia/gsttools_headers/qgstreamervideorenderer_p.h
index 6dba54fe4..1d22e1125 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideorenderer_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideorenderer_p.h
@@ -67,13 +67,13 @@ public:
     QGstreamerVideoRenderer(QObject *parent = 0);
     virtual ~QGstreamerVideoRenderer();
 
-    QAbstractVideoSurface *surface() const;
-    void setSurface(QAbstractVideoSurface *surface);
+    QAbstractVideoSurface *surface() const override;
+    void setSurface(QAbstractVideoSurface *surface) override;
 
-    GstElement *videoSink();
+    GstElement *videoSink() override;
 
-    void stopRenderer();
-    bool isReady() const { return m_surface != 0; }
+    void stopRenderer() override;
+    bool isReady() const override { return m_surface != 0; }
 
 signals:
     void sinkChanged();
diff --git a/src/multimedia/gsttools_headers/qgstreamervideowidget_p.h b/src/multimedia/gsttools_headers/qgstreamervideowidget_p.h
index f0a76c152..b2dfece60 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideowidget_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideowidget_p.h
@@ -73,31 +73,31 @@ public:
     explicit QGstreamerVideoWidgetControl(QObject *parent = 0, const QByteArray &elementName = QByteArray());
     virtual ~QGstreamerVideoWidgetControl();
 
-    GstElement *videoSink();
+    GstElement *videoSink() override;
 
-    QWidget *videoWidget();
+    QWidget *videoWidget() override;
 
-    void stopRenderer();
+    void stopRenderer() override;
 
-    Qt::AspectRatioMode aspectRatioMode() const;
-    void setAspectRatioMode(Qt::AspectRatioMode mode);
+    Qt::AspectRatioMode aspectRatioMode() const override;
+    void setAspectRatioMode(Qt::AspectRatioMode mode) override;
 
-    bool isFullScreen() const;
-    void setFullScreen(bool fullScreen);
+    bool isFullScreen() const override;
+    void setFullScreen(bool fullScreen) override;
 
-    int brightness() const;
-    void setBrightness(int brightness);
+    int brightness() const override;
+    void setBrightness(int brightness) override;
 
-    int contrast() const;
-    void setContrast(int contrast);
+    int contrast() const override;
+    void setContrast(int contrast) override;
 
-    int hue() const;
-    void setHue(int hue);
+    int hue() const override;
+    void setHue(int hue) override;
 
-    int saturation() const;
-    void setSaturation(int saturation);
+    int saturation() const override;
+    void setSaturation(int saturation) override;
 
-    bool eventFilter(QObject *object, QEvent *event);
+    bool eventFilter(QObject *object, QEvent *event) override;
 
 signals:
     void sinkChanged();
@@ -111,8 +111,8 @@ private:
     void createVideoWidget();
     void updateWidgetAttributes();
 
-    bool processSyncMessage(const QGstreamerMessage &message);
-    bool processBusMessage(const QGstreamerMessage &message);
+    bool processSyncMessage(const QGstreamerMessage &message) override;
+    bool processBusMessage(const QGstreamerMessage &message) override;
 
     QGstreamerVideoOverlay m_videoOverlay;
     QGstreamerVideoWidget *m_widget;
diff --git a/src/multimedia/gsttools_headers/qgstreamervideowindow_p.h b/src/multimedia/gsttools_headers/qgstreamervideowindow_p.h
index 949a18773..b489650f9 100644
--- a/src/multimedia/gsttools_headers/qgstreamervideowindow_p.h
+++ b/src/multimedia/gsttools_headers/qgstreamervideowindow_p.h
@@ -73,41 +73,41 @@ public:
     explicit QGstreamerVideoWindow(QObject *parent = 0, const QByteArray &elementName = QByteArray());
     ~QGstreamerVideoWindow();
 
-    WId winId() const;
-    void setWinId(WId id);
+    WId winId() const override;
+    void setWinId(WId id) override;
 
-    QRect displayRect() const;
-    void setDisplayRect(const QRect &rect);
+    QRect displayRect() const override;
+    void setDisplayRect(const QRect &rect) override;
 
-    bool isFullScreen() const;
-    void setFullScreen(bool fullScreen);
+    bool isFullScreen() const override;
+    void setFullScreen(bool fullScreen) override;
 
-    QSize nativeSize() const;
+    QSize nativeSize() const override;
 
-    Qt::AspectRatioMode aspectRatioMode() const;
-    void setAspectRatioMode(Qt::AspectRatioMode mode);
+    Qt::AspectRatioMode aspectRatioMode() const override;
+    void setAspectRatioMode(Qt::AspectRatioMode mode) override;
 
-    void repaint();
+    void repaint() override;
 
-    int brightness() const;
-    void setBrightness(int brightness);
+    int brightness() const override;
+    void setBrightness(int brightness) override;
 
-    int contrast() const;
-    void setContrast(int contrast);
+    int contrast() const override;
+    void setContrast(int contrast) override;
 
-    int hue() const;
-    void setHue(int hue);
+    int hue() const override;
+    void setHue(int hue) override;
 
-    int saturation() const;
-    void setSaturation(int saturation);
+    int saturation() const override;
+    void setSaturation(int saturation) override;
 
     QAbstractVideoSurface *surface() const;
 
-    GstElement *videoSink();
+    GstElement *videoSink() override;
 
-    bool processSyncMessage(const QGstreamerMessage &message);
-    bool processBusMessage(const QGstreamerMessage &message);
-    bool isReady() const { return m_windowId != 0; }
+    bool processSyncMessage(const QGstreamerMessage &message) override;
+    bool processBusMessage(const QGstreamerMessage &message) override;
+    bool isReady() const override { return m_windowId != 0; }
 
 signals:
     void sinkChanged();
diff --git a/src/multimedia/gsttools_headers/qgstvideobuffer_p.h b/src/multimedia/gsttools_headers/qgstvideobuffer_p.h
index 92128b92e..d2802d9a2 100644
--- a/src/multimedia/gsttools_headers/qgstvideobuffer_p.h
+++ b/src/multimedia/gsttools_headers/qgstvideobuffer_p.h
@@ -77,17 +77,17 @@ public:
 
     ~QGstVideoBuffer();
 
-    MapMode mapMode() const;
+    MapMode mapMode() const override;
 
 #if GST_CHECK_VERSION(1,0,0)
-    int map(MapMode mode, int *numBytes, int bytesPerLine[4], uchar *data[4]);
+    int map(MapMode mode, int *numBytes, int bytesPerLine[4], uchar *data[4]) override;
 #else
-    uchar *map(MapMode mode, int *numBytes, int *bytesPerLine);
+    uchar *map(MapMode mode, int *numBytes, int *bytesPerLine) override;
 #endif
 
-    void unmap();
+    void unmap() override;
 
-    QVariant handle() const { return m_handle; }
+    QVariant handle() const override { return m_handle; }
 private:
 #if GST_CHECK_VERSION(1,0,0)
     GstVideoInfo m_videoInfo;
diff --git a/src/multimedia/gsttools_headers/qgstvideorendererplugin_p.h b/src/multimedia/gsttools_headers/qgstvideorendererplugin_p.h
index 433cdf8e5..6a0c4c6bd 100644
--- a/src/multimedia/gsttools_headers/qgstvideorendererplugin_p.h
+++ b/src/multimedia/gsttools_headers/qgstvideorendererplugin_p.h
@@ -100,7 +100,7 @@ public:
     explicit QGstVideoRendererPlugin(QObject *parent = 0);
     virtual ~QGstVideoRendererPlugin() {}
 
-    virtual QGstVideoRenderer *createRenderer() = 0;
+    QGstVideoRenderer *createRenderer() override = 0;
 
 };
 
diff --git a/src/multimedia/gsttools_headers/qgstvideorenderersink_p.h b/src/multimedia/gsttools_headers/qgstvideorenderersink_p.h
index ff59810bc..3971c959d 100644
--- a/src/multimedia/gsttools_headers/qgstvideorenderersink_p.h
+++ b/src/multimedia/gsttools_headers/qgstvideorenderersink_p.h
@@ -76,14 +76,14 @@ public:
     QGstDefaultVideoRenderer();
     ~QGstDefaultVideoRenderer();
 
-    GstCaps *getCaps(QAbstractVideoSurface *surface);
-    bool start(QAbstractVideoSurface *surface, GstCaps *caps);
-    void stop(QAbstractVideoSurface *surface);
+    GstCaps *getCaps(QAbstractVideoSurface *surface) override;
+    bool start(QAbstractVideoSurface *surface, GstCaps *caps) override;
+    void stop(QAbstractVideoSurface *surface) override;
 
-    bool proposeAllocation(GstQuery *query);
+    bool proposeAllocation(GstQuery *query) override;
 
-    bool present(QAbstractVideoSurface *surface, GstBuffer *buffer);
-    void flush(QAbstractVideoSurface *surface);
+    bool present(QAbstractVideoSurface *surface, GstBuffer *buffer) override;
+    void flush(QAbstractVideoSurface *surface) override;
 
 private:
     QVideoSurfaceFormat m_format;
@@ -109,7 +109,7 @@ public:
 
     GstFlowReturn render(GstBuffer *buffer);
 
-    bool event(QEvent *event);
+    bool event(QEvent *event) override;
 
 private slots:
     bool handleEvent(QMutexLocker *locker);
diff --git a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodercontrol.h b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodercontrol.h
index c9c5c70e3..f5e26e553 100644
--- a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodercontrol.h
+++ b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodercontrol.h
@@ -64,25 +64,25 @@ public:
     QGstreamerAudioDecoderControl(QGstreamerAudioDecoderSession *session, QObject *parent = 0);
     ~QGstreamerAudioDecoderControl();
 
-    QAudioDecoder::State state() const;
+    QAudioDecoder::State state() const override;
 
-    QString sourceFilename() const;
-    void setSourceFilename(const QString &fileName);
+    QString sourceFilename() const override;
+    void setSourceFilename(const QString &fileName) override;
 
-    QIODevice* sourceDevice() const;
-    void setSourceDevice(QIODevice *device);
+    QIODevice* sourceDevice() const override;
+    void setSourceDevice(QIODevice *device) override;
 
-    void start();
-    void stop();
+    void start() override;
+    void stop() override;
 
-    QAudioFormat audioFormat() const;
-    void setAudioFormat(const QAudioFormat &format);
+    QAudioFormat audioFormat() const override;
+    void setAudioFormat(const QAudioFormat &format) override;
 
-    QAudioBuffer read();
-    bool bufferAvailable() const;
+    QAudioBuffer read() override;
+    bool bufferAvailable() const override;
 
-    qint64 position() const;
-    qint64 duration() const;
+    qint64 position() const override;
+    qint64 duration() const override;
 
 private:
     // Stuff goes here
diff --git a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderservice.h b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderservice.h
index df54d39f4..6e52b9d87 100644
--- a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderservice.h
+++ b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderservice.h
@@ -56,8 +56,8 @@ public:
     QGstreamerAudioDecoderService(QObject *parent = 0);
     ~QGstreamerAudioDecoderService();
 
-    QMediaControl *requestControl(const char *name);
-    void releaseControl(QMediaControl *control);
+    QMediaControl *requestControl(const char *name) override;
+    void releaseControl(QMediaControl *control) override;
 
 private:
     QGstreamerAudioDecoderControl *m_control;
diff --git a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderserviceplugin.h b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderserviceplugin.h
index a5ae56637..d1b96043b 100644
--- a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderserviceplugin.h
+++ b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecoderserviceplugin.h
@@ -55,11 +55,11 @@ class QGstreamerAudioDecoderServicePlugin
     Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "audiodecoder.json")
 
 public:
-    QMediaService* create(QString const& key);
-    void release(QMediaService *service);
+    QMediaService* create(const QString &key) override;
+    void release(QMediaService *service) override;
 
-    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList& codecs) const;
-    QStringList supportedMimeTypes() const;
+    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList &codecs) const override;
+    QStringList supportedMimeTypes() const override;
 
 private:
     void updateSupportedMimeTypes() const;
diff --git a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodersession.h b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodersession.h
index 991ac0043..8038d6a25 100644
--- a/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodersession.h
+++ b/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodersession.h
@@ -73,7 +73,7 @@ public:
     QAudioDecoder::State state() const { return m_state; }
     QAudioDecoder::State pendingState() const { return m_pendingState; }
 
-    bool processBusMessage(const QGstreamerMessage &message);
+    bool processBusMessage(const QGstreamerMessage &message) override;
 
 #if defined(HAVE_GST_APPSRC)
     QGstAppSrc *appsrc() const { return m_appSrc; }
diff --git a/src/plugins/gstreamer/mediacapture/qgstreameraudioencode.h b/src/plugins/gstreamer/mediacapture/qgstreameraudioencode.h
index b4d5c4a88..04de602ad 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreameraudioencode.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreameraudioencode.h
@@ -62,20 +62,20 @@ public:
     QGstreamerAudioEncode(QObject *parent);
     virtual ~QGstreamerAudioEncode();
 
-    QStringList supportedAudioCodecs() const;
-    QString codecDescription(const QString &codecName) const;
+    QStringList supportedAudioCodecs() const override;
+    QString codecDescription(const QString &codecName) const override;
 
     QStringList supportedEncodingOptions(const QString &codec) const;
     QVariant encodingOption(const QString &codec, const QString &name) const;
     void setEncodingOption(const QString &codec, const QString &name, const QVariant &value);
 
     QList<int> supportedSampleRates(const QAudioEncoderSettings &settings = QAudioEncoderSettings(),
-                                    bool *isContinuous = 0) const;
+                                    bool *isContinuous = 0) const override;
     QList<int> supportedChannelCounts(const QAudioEncoderSettings &settings = QAudioEncoderSettings()) const;
     QList<int> supportedSampleSizes(const QAudioEncoderSettings &settings = QAudioEncoderSettings()) const;
 
-    QAudioEncoderSettings audioSettings() const;
-    void setAudioSettings(const QAudioEncoderSettings&);
+    QAudioEncoderSettings audioSettings() const override;
+    void setAudioSettings(const QAudioEncoderSettings &) override;
 
     GstElement *createEncoder();
 
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.h b/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.h
index 55d85ce6f..0e53f0890 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercameracontrol.h
@@ -56,22 +56,22 @@ public:
 
     bool isValid() const { return true; }
 
-    QCamera::State state() const;
-    void setState(QCamera::State state);
+    QCamera::State state() const override;
+    void setState(QCamera::State state) override;
 
-    QCamera::Status status() const { return m_status; }
+    QCamera::Status status() const override { return m_status; }
 
-    QCamera::CaptureModes captureMode() const { return m_captureMode; }
-    void setCaptureMode(QCamera::CaptureModes mode);
+    QCamera::CaptureModes captureMode() const override { return m_captureMode; }
+    void setCaptureMode(QCamera::CaptureModes mode) override;
 
-    bool isCaptureModeSupported(QCamera::CaptureModes mode) const;
+    bool isCaptureModeSupported(QCamera::CaptureModes mode) const override;
 
     QCamera::LockTypes supportedLocks() const
     {
         return QCamera::NoLock;
     }
 
-    bool canChangeProperty(PropertyChangeType changeType, QCamera::Status status) const;
+    bool canChangeProperty(PropertyChangeType changeType, QCamera::Status status) const override;
 
 public slots:
     void reloadLater();
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamercapturemetadatacontrol.h b/src/plugins/gstreamer/mediacapture/qgstreamercapturemetadatacontrol.h
index aa114535f..6839bbe68 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamercapturemetadatacontrol.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercapturemetadatacontrol.h
@@ -49,15 +49,15 @@ class QGstreamerCaptureMetaDataControl : public QMetaDataWriterControl
     Q_OBJECT
 public:
     QGstreamerCaptureMetaDataControl(QObject *parent);
-    virtual ~QGstreamerCaptureMetaDataControl() {};
+    ~QGstreamerCaptureMetaDataControl() {}
 
 
-    bool isMetaDataAvailable() const { return true; }
-    bool isWritable() const { return true; }
+    bool isMetaDataAvailable() const override { return true; }
+    bool isWritable() const override { return true; }
 
-    QVariant metaData(const QString &key) const;
-    void setMetaData(const QString &key, const QVariant &value);
-    QStringList availableMetaData() const;
+    QVariant metaData(const QString &key) const override;
+    void setMetaData(const QString &key, const QVariant &value) override;
+    QStringList availableMetaData() const override;
 
 Q_SIGNALS:
     void metaDataChanged(const QMap<QByteArray, QVariant>&);
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamercaptureservice.h b/src/plugins/gstreamer/mediacapture/qgstreamercaptureservice.h
index dc731d810..aba98d495 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamercaptureservice.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercaptureservice.h
@@ -70,8 +70,8 @@ public:
     QGstreamerCaptureService(const QString &service, QObject *parent = 0);
     virtual ~QGstreamerCaptureService();
 
-    QMediaControl *requestControl(const char *name);
-    void releaseControl(QMediaControl *);
+    QMediaControl *requestControl(const char *name) override;
+    void releaseControl(QMediaControl *) override;
 
 private:
     void setAudioPreview(GstElement *);
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamercaptureserviceplugin.h b/src/plugins/gstreamer/mediacapture/qgstreamercaptureserviceplugin.h
index 1af9cdc90..d8b7e9768 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamercaptureserviceplugin.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercaptureserviceplugin.h
@@ -69,20 +69,20 @@ class QGstreamerCaptureServicePlugin
     Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "mediacapture.json")
 #endif
 public:
-    QMediaService* create(QString const& key);
-    void release(QMediaService *service);
+    QMediaService* create(const QString &key) override;
+    void release(QMediaService *service) override;
 
 #if defined(USE_GSTREAMER_CAMERA)
-    QMediaServiceProviderHint::Features supportedFeatures(const QByteArray &service) const;
+    QMediaServiceProviderHint::Features supportedFeatures(const QByteArray &service) const override;
 
-    QByteArray defaultDevice(const QByteArray &service) const;
-    QList<QByteArray> devices(const QByteArray &service) const;
-    QString deviceDescription(const QByteArray &service, const QByteArray &device);
+    QByteArray defaultDevice(const QByteArray &service) const override;
+    QList<QByteArray> devices(const QByteArray &service) const override;
+    QString deviceDescription(const QByteArray &service, const QByteArray &device) override;
     QVariant deviceProperty(const QByteArray &service, const QByteArray &device, const QByteArray &property);
 #endif
 
-    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList& codecs) const;
-    QStringList supportedMimeTypes() const;
+    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList &codecs) const override;
+    QStringList supportedMimeTypes() const override;
 
 private:
     void updateSupportedMimeTypes() const;
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamercapturesession.h b/src/plugins/gstreamer/mediacapture/qgstreamercapturesession.h
index 79203224b..e0c9107a7 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamercapturesession.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamercapturesession.h
@@ -138,7 +138,7 @@ public:
 
     bool isReady() const;
 
-    bool processBusMessage(const QGstreamerMessage &message);
+    bool processBusMessage(const QGstreamerMessage &message) override;
 
     void addProbe(QGstreamerAudioProbeControl* probe);
     void removeProbe(QGstreamerAudioProbeControl* probe);
@@ -166,8 +166,8 @@ public slots:
     void setVolume(qreal volume);
 
 private:
-    void probeCaps(GstCaps *caps);
-    bool probeBuffer(GstBuffer *buffer);
+    void probeCaps(GstCaps *caps) override;
+    bool probeBuffer(GstBuffer *buffer) override;
 
     enum PipelineMode { EmptyPipeline, PreviewPipeline, RecordingPipeline, PreviewAndRecordingPipeline };
 
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamerimagecapturecontrol.h b/src/plugins/gstreamer/mediacapture/qgstreamerimagecapturecontrol.h
index 7d4145ae1..f58cf09c5 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamerimagecapturecontrol.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamerimagecapturecontrol.h
@@ -53,12 +53,12 @@ public:
     QGstreamerImageCaptureControl(QGstreamerCaptureSession *session);
     virtual ~QGstreamerImageCaptureControl();
 
-    QCameraImageCapture::DriveMode driveMode() const { return QCameraImageCapture::SingleImageCapture; }
-    void setDriveMode(QCameraImageCapture::DriveMode) {}
+    QCameraImageCapture::DriveMode driveMode() const override { return QCameraImageCapture::SingleImageCapture; }
+    void setDriveMode(QCameraImageCapture::DriveMode) override {}
 
-    bool isReadyForCapture() const;
-    int capture(const QString &fileName);
-    void cancelCapture();
+    bool isReadyForCapture() const override;
+    int capture(const QString &fileName) override;
+    void cancelCapture() override;
 
 private slots:
     void updateState();
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamerimageencode.h b/src/plugins/gstreamer/mediacapture/qgstreamerimageencode.h
index d56a739f1..f3ebd3e90 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamerimageencode.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamerimageencode.h
@@ -59,13 +59,13 @@ public:
     virtual ~QGstreamerImageEncode();
 
     QList<QSize> supportedResolutions(const QImageEncoderSettings &settings = QImageEncoderSettings(),
-                                      bool *continuous = 0) const;
+                                      bool *continuous = 0) const override;
 
-    QStringList supportedImageCodecs() const;
-    QString imageCodecDescription(const QString &codecName) const;
+    QStringList supportedImageCodecs() const override;
+    QString imageCodecDescription(const QString &codecName) const override;
 
-    QImageEncoderSettings imageSettings() const;
-    void setImageSettings(const QImageEncoderSettings &settings);
+    QImageEncoderSettings imageSettings() const override;
+    void setImageSettings(const QImageEncoderSettings &settings) override;
 
 Q_SIGNALS:
     void settingsChanged();
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamermediacontainercontrol.h b/src/plugins/gstreamer/mediacapture/qgstreamermediacontainercontrol.h
index 0f25ad5d7..5c730b21d 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamermediacontainercontrol.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamermediacontainercontrol.h
@@ -56,13 +56,13 @@ class QGstreamerMediaContainerControl : public QMediaContainerControl
 Q_OBJECT
 public:
     QGstreamerMediaContainerControl(QObject *parent);
-    virtual ~QGstreamerMediaContainerControl() {};
+    ~QGstreamerMediaContainerControl() {}
 
-    virtual QStringList supportedContainers() const { return m_containers.supportedCodecs(); }
-    virtual QString containerFormat() const { return m_format; }
-    virtual void setContainerFormat(const QString &formatMimeType) { m_format = formatMimeType; }
+    QStringList supportedContainers() const override { return m_containers.supportedCodecs(); }
+    QString containerFormat() const override { return m_format; }
+    void setContainerFormat(const QString &formatMimeType) override { m_format = formatMimeType; }
 
-    virtual QString containerDescription(const QString &formatMimeType) const { return m_containers.codecDescription(formatMimeType); }
+    QString containerDescription(const QString &formatMimeType) const override { return m_containers.codecDescription(formatMimeType); }
 
     QByteArray formatElementName() const { return m_containers.codecElement(containerFormat()); }
 
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.h b/src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.h
index 96e263e72..b80716f4c 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.h
@@ -56,26 +56,26 @@ public:
     QGstreamerRecorderControl(QGstreamerCaptureSession *session);
     virtual ~QGstreamerRecorderControl();
 
-    QUrl outputLocation() const;
-    bool setOutputLocation(const QUrl &sink);
+    QUrl outputLocation() const override;
+    bool setOutputLocation(const QUrl &sink) override;
 
-    QMediaRecorder::State state() const;
-    QMediaRecorder::Status status() const;
+    QMediaRecorder::State state() const override;
+    QMediaRecorder::Status status() const override;
 
-    qint64 duration() const;
+    qint64 duration() const override;
 
-    bool isMuted() const;
-    qreal volume() const;
+    bool isMuted() const override;
+    qreal volume() const override;
 
-    void applySettings();
+    void applySettings() override;
 
 public slots:
-    void setState(QMediaRecorder::State state);
+    void setState(QMediaRecorder::State state) override;
     void record();
     void pause();
     void stop();
-    void setMuted(bool);
-    void setVolume(qreal volume);
+    void setMuted(bool) override;
+    void setVolume(qreal volume) override;
 
 private slots:
     void updateStatus();
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.h b/src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.h
index 20e855922..a82c7cf4b 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamerv4l2input.h
@@ -56,10 +56,10 @@ public:
     QGstreamerV4L2Input(QObject *parent = 0);
     virtual ~QGstreamerV4L2Input();
 
-    GstElement *buildElement();
+    GstElement *buildElement() override;
 
-    QList<qreal> supportedFrameRates(const QSize &frameSize = QSize()) const;
-    QList<QSize> supportedResolutions(qreal frameRate = -1) const;
+    QList<qreal> supportedFrameRates(const QSize &frameSize = QSize()) const override;
+    QList<QSize> supportedResolutions(qreal frameRate = -1) const override;
 
     QByteArray device() const;
 
diff --git a/src/plugins/gstreamer/mediacapture/qgstreamervideoencode.h b/src/plugins/gstreamer/mediacapture/qgstreamervideoencode.h
index 0c8d99d1d..bc6636012 100644
--- a/src/plugins/gstreamer/mediacapture/qgstreamervideoencode.h
+++ b/src/plugins/gstreamer/mediacapture/qgstreamervideoencode.h
@@ -62,18 +62,18 @@ public:
     virtual ~QGstreamerVideoEncode();
 
     QList<QSize> supportedResolutions(const QVideoEncoderSettings &settings = QVideoEncoderSettings(),
-                                      bool *continuous = 0) const;
+                                      bool *continuous = 0) const override;
 
     QList< qreal > supportedFrameRates(const QVideoEncoderSettings &settings = QVideoEncoderSettings(),
-                                       bool *continuous = 0) const;
+                                       bool *continuous = 0) const override;
 
     QPair<int,int> rateAsRational() const;
 
-    QStringList supportedVideoCodecs() const;
-    QString videoCodecDescription(const QString &codecName) const;
+    QStringList supportedVideoCodecs() const override;
+    QString videoCodecDescription(const QString &codecName) const override;
 
-    QVideoEncoderSettings videoSettings() const;
-    void setVideoSettings(const QVideoEncoderSettings &settings);
+    QVideoEncoderSettings videoSettings() const override;
+    void setVideoSettings(const QVideoEncoderSettings &settings) override;
 
     QStringList supportedEncodingOptions(const QString &codec) const;
     QVariant encodingOption(const QString &codec, const QString &name) const;
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreameravailabilitycontrol.h b/src/plugins/gstreamer/mediaplayer/qgstreameravailabilitycontrol.h
index 2c303f5af..78299b608 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreameravailabilitycontrol.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreameravailabilitycontrol.h
@@ -51,7 +51,7 @@ class QGStreamerAvailabilityControl : public QMediaAvailabilityControl
     Q_OBJECT
 public:
     QGStreamerAvailabilityControl(QMediaPlayerResourceSetInterface *resources, QObject *parent = 0);
-    QMultimedia::AvailabilityStatus availability() const;
+    QMultimedia::AvailabilityStatus availability() const override;
 
 private Q_SLOTS:
     void handleAvailabilityChanged();
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamermetadataprovider.h b/src/plugins/gstreamer/mediaplayer/qgstreamermetadataprovider.h
index 1bbc5b1a5..bf8f7e842 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamermetadataprovider.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamermetadataprovider.h
@@ -53,11 +53,11 @@ public:
     QGstreamerMetaDataProvider( QGstreamerPlayerSession *session, QObject *parent );
     virtual ~QGstreamerMetaDataProvider();
 
-    bool isMetaDataAvailable() const;
+    bool isMetaDataAvailable() const override;
     bool isWritable() const;
 
-    QVariant metaData(const QString &key) const;
-    QStringList availableMetaData() const;
+    QVariant metaData(const QString &key) const override;
+    QStringList availableMetaData() const override;
 
 private slots:
     void updateTags();
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamerplayercontrol.h b/src/plugins/gstreamer/mediaplayer/qgstreamerplayercontrol.h
index 9ecf5f499..6067a68fc 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamerplayercontrol.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamerplayercontrol.h
@@ -67,42 +67,42 @@ public:
     QGstreamerPlayerControl(QGstreamerPlayerSession *session, QObject *parent = 0);
     ~QGstreamerPlayerControl();
 
-    QMediaPlayer::State state() const;
-    QMediaPlayer::MediaStatus mediaStatus() const;
+    QMediaPlayer::State state() const override;
+    QMediaPlayer::MediaStatus mediaStatus() const override;
 
-    qint64 position() const;
-    qint64 duration() const;
+    qint64 position() const override;
+    qint64 duration() const override;
 
-    int bufferStatus() const;
+    int bufferStatus() const override;
 
-    int volume() const;
-    bool isMuted() const;
+    int volume() const override;
+    bool isMuted() const override;
 
-    bool isAudioAvailable() const;
-    bool isVideoAvailable() const;
+    bool isAudioAvailable() const override;
+    bool isVideoAvailable() const override;
     void setVideoOutput(QObject *output);
 
-    bool isSeekable() const;
-    QMediaTimeRange availablePlaybackRanges() const;
+    bool isSeekable() const override;
+    QMediaTimeRange availablePlaybackRanges() const override;
 
-    qreal playbackRate() const;
-    void setPlaybackRate(qreal rate);
+    qreal playbackRate() const override;
+    void setPlaybackRate(qreal rate) override;
 
-    QMediaContent media() const;
-    const QIODevice *mediaStream() const;
-    void setMedia(const QMediaContent&, QIODevice *);
+    QMediaContent media() const override;
+    const QIODevice *mediaStream() const override;
+    void setMedia(const QMediaContent&, QIODevice *) override;
 
     QMediaPlayerResourceSetInterface* resources() const;
 
 public Q_SLOTS:
-    void setPosition(qint64 pos);
+    void setPosition(qint64 pos) override;
 
-    void play();
-    void pause();
-    void stop();
+    void play() override;
+    void pause() override;
+    void stop() override;
 
-    void setVolume(int volume);
-    void setMuted(bool muted);
+    void setVolume(int volume) override;
+    void setMuted(bool muted) override;
 
 private Q_SLOTS:
     void updateSessionState(QMediaPlayer::State state);
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamerplayerservice.h b/src/plugins/gstreamer/mediaplayer/qgstreamerplayerservice.h
index 423ee9173..ec0c0944b 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamerplayerservice.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamerplayerservice.h
@@ -69,8 +69,8 @@ public:
     QGstreamerPlayerService(QObject *parent = 0);
     ~QGstreamerPlayerService();
 
-    QMediaControl *requestControl(const char *name);
-    void releaseControl(QMediaControl *control);
+    QMediaControl *requestControl(const char *name) override;
+    void releaseControl(QMediaControl *control) override;
 
 private:
     QGstreamerPlayerControl *m_control;
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamerplayerserviceplugin.h b/src/plugins/gstreamer/mediaplayer/qgstreamerplayerserviceplugin.h
index 8e3e8a2af..71eece23e 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamerplayerserviceplugin.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamerplayerserviceplugin.h
@@ -58,13 +58,13 @@ class QGstreamerPlayerServicePlugin
     Q_INTERFACES(QMediaServiceSupportedFormatsInterface)
     Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "mediaplayer.json")
 public:
-    QMediaService* create(QString const& key);
-    void release(QMediaService *service);
+    QMediaService* create(const QString &key) override;
+    void release(QMediaService *service) override;
 
-    QMediaServiceProviderHint::Features supportedFeatures(const QByteArray &service) const;
+    QMediaServiceProviderHint::Features supportedFeatures(const QByteArray &service) const override;
 
-    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList& codecs) const;
-    QStringList supportedMimeTypes() const;
+    QMultimedia::SupportEstimate hasSupport(const QString &mimeType, const QStringList &codecs) const override;
+    QStringList supportedMimeTypes() const override;
 
 private:
     void updateSupportedMimeTypes() const;
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamerplayersession.h b/src/plugins/gstreamer/mediaplayer/qgstreamerplayersession.h
index 1f93c7780..14ef6070f 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamerplayersession.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamerplayersession.h
@@ -114,7 +114,7 @@ public:
     int activeStream(QMediaStreamsControl::StreamType streamType) const;
     void setActiveStream(QMediaStreamsControl::StreamType streamType, int streamNumber);
 
-    bool processBusMessage(const QGstreamerMessage &message);
+    bool processBusMessage(const QGstreamerMessage &message) override;
 
 #if defined(HAVE_GST_APPSRC)
     QGstAppSrc *appsrc() const { return m_appSrc; }
diff --git a/src/plugins/gstreamer/mediaplayer/qgstreamerstreamscontrol.h b/src/plugins/gstreamer/mediaplayer/qgstreamerstreamscontrol.h
index ec9de39f0..6f332c160 100644
--- a/src/plugins/gstreamer/mediaplayer/qgstreamerstreamscontrol.h
+++ b/src/plugins/gstreamer/mediaplayer/qgstreamerstreamscontrol.h
@@ -53,13 +53,13 @@ public:
     QGstreamerStreamsControl(QGstreamerPlayerSession *session, QObject *parent);
     virtual ~QGstreamerStreamsControl();
 
-    virtual int streamCount();
-    virtual StreamType streamType(int streamNumber);
+    int streamCount() override;
+    StreamType streamType(int streamNumber) override;
 
-    virtual QVariant metaData(int streamNumber, const QString &key);
+    QVariant metaData(int streamNumber, const QString &key) override;
 
-    virtual bool isActive(int streamNumber);
-    virtual void setActive(int streamNumber, bool state);
+    bool isActive(int streamNumber) override;
+    void setActive(int streamNumber, bool state) override;
 
 private:
     QGstreamerPlayerSession *m_session;