WMF: enabled HW-accelerated video decoding for the QML video item.

It also applies to QGraphicsVideoItem when used on a GL viewport.
We now have a new video sink that is based on Microsoft's EVR sink, we just
replace the default Presenter with our own. Frames are rendered into D3D
surfaces using DXVA, then copied into a shared D3D/EGL surface and finally
bound to a GL texture to be used by the video surface.
The shared D3D/EGL surface is a feature provided by ANGLE and therefore Qt
must be compiled with ANGLE for this new video sink to be compiled and
used.

Change-Id: I0b7b9968eed5488f9ef1a2dcca5213bd0af232ab
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

src/plugins/wmf/wmf.pro

@@ -16,14 +16,32 @@ HEADERS += \
     mfstream.h \
     sourceresolver.h \
     samplegrabber.h \
-    mftvideo.h
+    mftvideo.h \
+    mfglobal.h \
+    mfactivate.h
 
 SOURCES += \
     wmfserviceplugin.cpp \
     mfstream.cpp \
     sourceresolver.cpp \
     samplegrabber.cpp \
-    mftvideo.cpp
+    mftvideo.cpp \
+    mfactivate.cpp \
+    mfglobal.cpp
+
+contains(QT_CONFIG, angle) {
+    LIBS += -ld3d9 -ldxva2 -lwinmm -levr
+    QT += gui-private
+
+    HEADERS += \
+        evrcustompresenter.h \
+        evrd3dpresentengine.h
+
+    SOURCES += \
+        evrcustompresenter.cpp \
+        evrd3dpresentengine.cpp
+}
+
 
 include (player/player.pri)
 include (decoder/decoder.pri)