applemedia: Conditionally compile qtkitvideosrc

The API was deprecated in 10.9 and apparently does not exist in the SDK for
macOS Sierra anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=770587

configure.ac

@@ -543,6 +543,7 @@ dnl *** plug-ins to exclude ***
 AC_CHECK_HEADER(AVFoundation/AVFoundation.h, HAVE_AVFOUNDATION="yes", HAVE_AVFOUNDATION="no", [-])
 AC_CHECK_HEADER(MobileCoreServices/MobileCoreServices.h, HAVE_IOS="yes", HAVE_IOS="no", [-])
 AC_CHECK_HEADER(VideoToolbox/VideoToolbox.h, HAVE_VIDEOTOOLBOX="yes", HAVE_VIDEOTOOLBOX="no", [-])
+AC_CHECK_HEADER(QTKit/QTKit.h, HAVE_QTKIT="yes", HAVE_QTKIT="no", [-])
 
 if test "x$HAVE_VIDEOTOOLBOX" = "xyes"; then
   old_LIBS=$LIBS
@@ -569,6 +570,10 @@ if test "x$HAVE_VIDEOTOOLBOX" = "xyes"; then
   AC_DEFINE(HAVE_VIDEOTOOLBOX, 1, [Define if building with VideoToolbox])
 fi
 
+AM_CONDITIONAL(HAVE_QTKIT, test "x$HAVE_QTKIT" = "xyes")
+if test "x$HAVE_QTKIT" = "xyes"; then
+  AC_DEFINE(HAVE_QTKIT, 1, [Define if building with QTKit])
+fi
 dnl disable gst plugins we might not be able to build on this
 dnl platform: (ugly but minimally invasive)
 dnl FIXME: maybe move to sys, or make work with winsock2

sys/applemedia/Makefile.am

@@ -94,17 +94,23 @@ libgstapplemedia_la_LDFLAGS +=			\
 else
 
 libgstapplemedia_la_SOURCES +=			\
-	qtkitvideosrc.m 			\
 	iosurfacememory.c
 
 libgstapplemedia_la_LDFLAGS +=			\
 	-Wl,-framework -Wl,Cocoa		\
-	-Wl,-framework -Wl,QTKit		\
 	-Wl,-framework -Wl,OpenGL 		\
 	-Wl,-framework -Wl,IOSurface
 
 endif
 
+if HAVE_QTKIT
+libgstapplemedia_la_SOURCES +=			\
+	qtkitvideosrc.m
+
+libgstapplemedia_la_LDFLAGS +=			\
+	-Wl,-framework -Wl,QTKit
+endif
+
 if HAVE_AVFOUNDATION
 
 libgstapplemedia_la_SOURCES +=			\

sys/applemedia/plugin.m

@@ -25,7 +25,8 @@
 #include "corevideomemory.h"
 #ifdef HAVE_IOS
 #include "iosassetsrc.h"
-#else
+#endif
+#ifdef HAVE_QTKIT
 #include "qtkitvideosrc.h"
 #endif
 #ifdef HAVE_AVFOUNDATION
@@ -73,7 +74,9 @@ plugin_init (GstPlugin * plugin)
       GST_TYPE_IOS_ASSET_SRC);
 #else
   enable_mt_mode ();
+#endif
 
+#ifdef HAVE_QTKIT
   res = gst_element_register (plugin, "qtkitvideosrc", GST_RANK_SECONDARY,
       GST_TYPE_QTKIT_VIDEO_SRC);
 #endif