Initial implementation of Mac camera backend

Based on AVFoundation framework

Change-Id: If4cfd105a592f50b42606624548b9ffc870e3e47
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

src/plugins/avfoundation/camera/camera.pro

@@ -0,0 +1,52 @@
+load(qt_build_config)
+
+# Avoid clash with a variable named `slots' in a Quartz header
+CONFIG += no_keywords
+
+TARGET = qavfcamera
+QT += multimedia-private network
+
+PLUGIN_TYPE = mediaservice
+
+load(qt_plugin)
+DESTDIR = $$QT.multimedia.plugins/$${PLUGIN_TYPE}
+
+LIBS += -framework AppKit -framework AudioUnit \
+        -framework AudioToolbox -framework CoreAudio \
+        -framework QuartzCore -framework AVFoundation \
+        -framework CoreMedia
+
+target.path += $$[QT_INSTALL_PLUGINS]/$${PLUGIN_TYPE}
+INSTALLS += target
+
+OTHER_FILES += avfcamera.json
+
+DEFINES += QMEDIA_AVF_CAMERA
+
+HEADERS += \
+    avfcameradebug.h \
+    avfcameraserviceplugin.h \
+    avfcameracontrol.h \
+    avfvideorenderercontrol.h \
+    avfcamerametadatacontrol.h \
+    avfimagecapturecontrol.h \
+    avfmediarecordercontrol.h \
+    avfcameraservice.h \
+    avfcamerasession.h \
+    avfstoragelocation.h \
+    avfvideodevicecontrol.h \
+    avfaudioinputselectorcontrol.h \
+
+OBJECTIVE_SOURCES += \
+    avfcameraserviceplugin.mm \
+    avfcameracontrol.mm \
+    avfvideorenderercontrol.mm \
+    avfcamerametadatacontrol.mm \
+    avfimagecapturecontrol.mm \
+    avfmediarecordercontrol.mm \
+    avfcameraservice.mm \
+    avfcamerasession.mm \
+    avfstoragelocation.mm \
+    avfvideodevicecontrol.mm \
+    avfaudioinputselectorcontrol.mm \
+