applemedia: enable vtdec and vtenc only on >= 10.8 where VideoToolbox is public

Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=723670

configure.ac

@@ -501,6 +501,7 @@ fi
 
 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", [-])
 
 AM_CONDITIONAL(HAVE_AVFOUNDATION, test "x$HAVE_AVFOUNDATION" = "xyes")
 if test "x$HAVE_AVFOUNDATION" = "xyes"; then
@@ -512,6 +513,11 @@ if test "x$HAVE_IOS" = "xyes"; then
   AC_DEFINE(HAVE_IOS, 1, [Define if building for Apple iOS])
 fi
 
+AM_CONDITIONAL(HAVE_VIDEOTOOLBOX, test "x$HAVE_VIDEOTOOLBOX" = "xyes")
+if test "x$HAVE_VIDEOTOOLBOX" = "xyes"; then
+  AC_DEFINE(HAVE_VIDEOTOOLBOX, 1, [Define if building with VideoToolbox])
+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

@@ -54,10 +54,6 @@ libgstapplemedia_la_LDFLAGS =			\
 	-Wl,-framework -Wl,CoreVideo 		\
 	-Wl,-framework -Wl,AudioToolbox
 
-if !HAVE_IOS
-libgstapplemedia_la_LDFLAGS += -Wl,-framework -Wl,VideoToolbox
-endif
-
 noinst_HEADERS =				\
 	qtkitvideosrc.h				\
 	avfvideosrc.h				\
@@ -88,9 +84,7 @@ libgstapplemedia_la_LDFLAGS +=			\
 else
 
 libgstapplemedia_la_SOURCES +=			\
-	qtkitvideosrc.m				\
-	vtenc.c 				\
-	vtdec.c
+	qtkitvideosrc.m
 
 libgstapplemedia_la_LDFLAGS +=			\
 	-Wl,-framework -Wl,Cocoa		\
@@ -108,3 +102,11 @@ libgstapplemedia_la_LDFLAGS +=			\
 	-Wl,-framework -Wl,AVFoundation
 
 endif
+
+if HAVE_VIDEOTOOLBOX
+libgstapplemedia_la_SOURCES +=			\
+	vtenc.c 				\
+	vtdec.c
+
+libgstapplemedia_la_LDFLAGS += -Wl,-framework -Wl,VideoToolbox
+endif

sys/applemedia/plugin.m

@@ -31,18 +31,23 @@
 #include "avfvideosrc.h"
 #include "avfassetsrc.h"
 #endif
+#ifdef HAVE_VIDEOTOOLBOX
+#include "vtdec.h"
+#endif
 #ifndef HAVE_IOS
 #define AV_RANK GST_RANK_SECONDARY
 #include "vth264decbin.h"
 #include "vth264encbin.h"
-#include "vtdec.h"
 #else
 #define AV_RANK GST_RANK_PRIMARY
 #endif
 #include "atdec.h"
 
-#ifndef HAVE_IOS
+#ifdef HAVE_VIDEOTOOLBOX
 void gst_vtenc_register_elements (GstPlugin * plugin);
+#endif
+
+#ifndef HAVE_IOS
 
 static void
 enable_mt_mode (void)
@@ -84,7 +89,7 @@ plugin_init (GstPlugin * plugin)
 #endif
   res &= gst_element_register (plugin, "atdec", GST_RANK_PRIMARY, GST_TYPE_ATDEC);
 
-#ifndef HAVE_IOS
+#ifdef HAVE_VIDEOTOOLBOX
   res &= gst_element_register (plugin, "vtdec", GST_RANK_PRIMARY, GST_TYPE_VTDEC);
   gst_vtenc_register_elements (plugin);
 #endif