Add support for face detection focus point mode to camerabin backend.

[ChangeLog][GStreamer] Implemented the face detection focus point mode
in the gstreamer camerabin backend.

Change-Id: Ia582d2fb5e74d5b438aa0038224c5e20e597d53e
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

1 files changed, 30 insertions, 2 deletions

diff --git a/src/plugins/gstreamer/camerabin/camerabinfocus.h b/src/plugins/gstreamer/camerabin/camerabinfocus.h
index 1ac013789..4fa5cb550 100644
--- a/src/plugins/gstreamer/camerabin/camerabinfocus.h
+++ b/src/plugins/gstreamer/camerabin/camerabinfocus.h
@@ -37,6 +37,12 @@
 #include <qcamera.h>
 #include <qcamerafocuscontrol.h>
 
+#include <private/qgstreamerbufferprobe_p.h>
+
+#include <qbasictimer.h>
+#include <qmutex.h>
+#include <qvector.h>
+
 #include <gst/gst.h>
 #include <glib.h>
 
@@ -44,7 +50,11 @@ QT_BEGIN_NAMESPACE
 
 class CameraBinSession;
 
-class CameraBinFocus  : public QCameraFocusControl
+class CameraBinFocus
+    : public QCameraFocusControl
+#if GST_CHECK_VERSION(1,0,0)
+    , QGstreamerBufferProbe
+#endif
 {
     Q_OBJECT
 
@@ -76,13 +86,27 @@ public Q_SLOTS:
 
     void setViewfinderResolution(const QSize &resolution);
 
+#if GST_CHECK_VERSION(1,0,0)
+protected:
+    void timerEvent(QTimerEvent *event);
+#endif
+
 private Q_SLOTS:
     void _q_setFocusStatus(QCamera::LockStatus status, QCamera::LockChangeReason reason);
     void _q_handleCameraStateChange(QCamera::State state);
 
+#if GST_CHECK_VERSION(1,0,0)
+    void _q_updateFaces();
+#endif
+
 private:
     void resetFocusPoint();
-    void updateRegionOfInterest(const QRectF &focusRect, int priority);
+    void updateRegionOfInterest(const QRectF &rectangle);
+    void updateRegionOfInterest(const QVector<QRect> &rectangles);
+
+#if GST_CHECK_VERSION(1,0,0)
+    bool probeBuffer(GstBuffer *buffer);
+#endif
 
     CameraBinSession *m_session;
     QCamera::State m_cameraState;
@@ -93,6 +117,10 @@ private:
     QPointF m_focusPoint;
     QRectF m_focusRect;
     QSize m_viewfinderResolution;
+    QVector<QRect> m_faces;
+    QVector<QRect> m_faceFocusRects;
+    QBasicTimer m_faceResetTimer;
+    mutable QMutex m_mutex;
 };
 
 QT_END_NAMESPACE