Add qRegisterMetaTypes for the public Q_DECLARE_METATYPEs.

Also turned qtmedianamespace.qdoc into a cpp file so I
could stick the qRegisterMetaTypes into it.

Change-Id: Idd6d3e2f348f1ed45b0a35ce180d023a170e8625
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/multimedia/video/qabstractvideobuffer.cpp

@@ -48,6 +48,19 @@
 
 QT_BEGIN_NAMESPACE
 
+namespace
+{
+    class QAbstractVideoBufferPrivateRegisterMetaTypes
+    {
+    public:
+        QAbstractVideoBufferPrivateRegisterMetaTypes()
+        {
+            qRegisterMetaType<QAbstractVideoBuffer::HandleType>();
+            qRegisterMetaType<QAbstractVideoBuffer::MapMode>();
+        }
+    } _registerMetaTypes;
+}
+
 /*!
     \class QAbstractVideoBuffer
     \brief The QAbstractVideoBuffer class is an abstraction for video data.

src/multimedia/video/qabstractvideosurface.cpp

@@ -50,6 +50,17 @@
 
 QT_BEGIN_NAMESPACE
 
+namespace
+{
+    class QAbstractVideoSurfacePrivateRegisterMetaTypes
+    {
+    public:
+        QAbstractVideoSurfacePrivateRegisterMetaTypes()
+        {
+            qRegisterMetaType<QAbstractVideoSurface::Error>();
+        }
+    } _registerMetaTypes;
+}
 
 
 class QAbstractVideoSurfacePrivate {

src/multimedia/video/qvideoframe.cpp

@@ -61,7 +61,9 @@ class QVideoFramePrivateRegisterMetaTypes
 public:
     QVideoFramePrivateRegisterMetaTypes()
     {
-        qRegisterMetaType<QVideoFrame::PixelFormat>("QVideoFrame::PixelFormat");
+        qRegisterMetaType<QVideoFrame>();
+        qRegisterMetaType<QVideoFrame::FieldType>();
+        qRegisterMetaType<QVideoFrame::PixelFormat>();
     }
 } _registerMetaTypes;
 }

src/multimedia/video/qvideosurfaceformat.cpp

@@ -57,6 +57,8 @@ namespace
         QVideoSurfaceFormatPrivateRegisterMetaTypes()
         {
             qRegisterMetaType<QVideoSurfaceFormat>();
+            qRegisterMetaType<QVideoSurfaceFormat::Direction>();
+            qRegisterMetaType<QVideoSurfaceFormat::YCbCrColorSpace>();
         }
     } _registerMetaTypes;
 }