From 82aae4df74c269765ccfe66c486fbcf3ae01f086 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Wed, 17 Sep 2014 10:38:20 +0300
Subject: [PATCH] applemedia: Do weak linking with the VideoToolbox framework

It does not exist on older OSX and iOS but we still want to
be able to use it when it's available.
---
 sys/applemedia/Makefile.am | 2 +-
 sys/applemedia/plugin.m    | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/sys/applemedia/Makefile.am b/sys/applemedia/Makefile.am
index 36f3b9e242..746744245d 100644
--- a/sys/applemedia/Makefile.am
+++ b/sys/applemedia/Makefile.am
@@ -96,5 +96,5 @@ libgstapplemedia_la_SOURCES +=			\
 	vtenc.c 				\
 	vtdec.c
 
-libgstapplemedia_la_LDFLAGS += -Wl,-framework -Wl,VideoToolbox
+libgstapplemedia_la_LDFLAGS += -Wl,-weak_framework -Wl,VideoToolbox
 endif
diff --git a/sys/applemedia/plugin.m b/sys/applemedia/plugin.m
index e85f67a6aa..b9d82b3a76 100644
--- a/sys/applemedia/plugin.m
+++ b/sys/applemedia/plugin.m
@@ -90,8 +90,11 @@ plugin_init (GstPlugin * plugin)
   res &= gst_element_register (plugin, "atdec", GST_RANK_MARGINAL, GST_TYPE_ATDEC);
 
 #ifdef HAVE_VIDEOTOOLBOX
-  res &= gst_element_register (plugin, "vtdec", GST_RANK_PRIMARY, GST_TYPE_VTDEC);
-  gst_vtenc_register_elements (plugin);
+  /* Check if the framework actually exists at runtime */
+  if (VTCompressionSessionCreate != NULL) {
+    res &= gst_element_register (plugin, "vtdec", GST_RANK_PRIMARY, GST_TYPE_VTDEC);
+    gst_vtenc_register_elements (plugin);
+  }
 #endif
 
   return res;