From b57f255f26e8f8cb337b0049b0a96ab1f3f1037f Mon Sep 17 00:00:00 2001
From: =?utf8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Sun, 19 Oct 2014 14:51:40 +0200
Subject: [PATCH] vtenc: VTCompressionSessionPrepareToEncodeFrames only exists
 since 10.9.6

Check with configure for it instead of using one of the availability macros
as those wouldn't work as expected with minor versions.
---
 configure.ac           | 10 ++++++++++
 sys/applemedia/vtenc.c | 14 +++++++++-----
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index c305646..af0435a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -504,6 +504,16 @@ AC_CHECK_HEADER(AVFoundation/AVFoundation.h, HAVE_AVFOUNDATION="yes", HAVE_AVFOU
 AC_CHECK_HEADER(MobileCoreServices/MobileCoreServices.h, HAVE_IOS="yes", HAVE_IOS="no", [-])
 AC_CHECK_HEADER(VideoToolbox/VideoToolbox.h, HAVE_VIDEOTOOLBOX="yes", HAVE_VIDEOTOOLBOX="no", [-])
 
+if test "x$HAVE_VIDEOTOOLBOX" = "xyes"; then
+  old_LIBS=$LIBS
+  LIBS="$LIBS -framework VideoToolbox"
+  AC_CHECK_FUNC(VTCompressionSessionPrepareToEncodeFrames, [
+    AC_DEFINE(HAVE_VIDEOTOOLBOX_10_9_6, 1, [Define if building with VideoToolbox >= 10.9.6])
+  ], [
+  ])
+  LIBS=$old_LIBS
+fi
+
 AM_CONDITIONAL(HAVE_AVFOUNDATION, test "x$HAVE_AVFOUNDATION" = "xyes")
 if test "x$HAVE_AVFOUNDATION" = "xyes"; then
   AC_DEFINE(HAVE_AVFOUNDATION, 1, [Define if building with AVFoundation])
diff --git a/sys/applemedia/vtenc.c b/sys/applemedia/vtenc.c
index 40eb4a2..13c9412 100644
--- a/sys/applemedia/vtenc.c
+++ b/sys/applemedia/vtenc.c
@@ -492,12 +492,16 @@ gst_vtenc_create_session (GstVTEnc * self)
   gst_vtenc_session_configure_bitrate (self, session,
       gst_vtenc_get_bitrate (self));
 
-  status = VTCompressionSessionPrepareToEncodeFrames (session);
-  if (status != noErr) {
-    GST_ERROR_OBJECT (self,
-        "VTCompressionSessionPrepareToEncodeFrames() returned: %d",
-        (int) status);
+#ifdef HAVE_VIDEOTOOLBOX_10_9_6
+  if (VTCompressionSessionPrepareToEncodeFrames) {
+    status = VTCompressionSessionPrepareToEncodeFrames (session);
+    if (status != noErr) {
+      GST_ERROR_OBJECT (self,
+          "VTCompressionSessionPrepareToEncodeFrames() returned: %d",
+          (int) status);
+    }
   }
+#endif
 
 beach:
   CFRelease (pb_attrs);
-- 
2.7.4