netaddressmeta: gst_buffer_get_net_address_meta() as function

Implement gst_buffer_get_net_address_meta() as a function instead
of a macro in order to get gobject-introspection to work.

https://bugzilla.gnome.org/show_bug.cgi?id=702921

libs/gst/net/gstnetaddressmeta.c

@@ -119,3 +119,19 @@ gst_buffer_add_net_address_meta (GstBuffer * buffer, GSocketAddress * addr)
 
   return meta;
 }
+
+/**
+ * gst_buffer_get_net_address_meta:
+ * @buffer: a #GstBuffer
+ *
+ * Find the #GstNetAddressMeta on @buffer.
+ *
+ * Returns: (transfer none): the #GstNetAddressMeta or %NULL when there
+ * is no such metadata on @buffer.
+ */
+GstNetAddressMeta *
+gst_buffer_get_net_address_meta (GstBuffer * buffer)
+{
+  return (GstNetAddressMeta *)
+      gst_buffer_get_meta (buffer, GST_NET_ADDRESS_META_API_TYPE);
+}

libs/gst/net/gstnetaddressmeta.h

@@ -43,15 +43,13 @@ struct _GstNetAddressMeta {
 GType gst_net_address_meta_api_get_type (void);
 #define GST_NET_ADDRESS_META_API_TYPE (gst_net_address_meta_api_get_type())
 
-#define gst_buffer_get_net_address_meta(b) \
-  ((GstNetAddressMeta*)gst_buffer_get_meta((b),GST_NET_ADDRESS_META_API_TYPE))
-
 /* implementation */
 const GstMetaInfo *gst_net_address_meta_get_info (void);
 #define GST_NET_ADDRESS_META_INFO (gst_net_address_meta_get_info())
 
 GstNetAddressMeta * gst_buffer_add_net_address_meta (GstBuffer      *buffer,
                                                      GSocketAddress *addr);
+GstNetAddressMeta * gst_buffer_get_net_address_meta (GstBuffer      *buffer);
 
 G_END_DECLS
 

win32/common/libgstnet.def

@@ -1,6 +1,7 @@
 EXPORTS
 	gst_buffer_add_net_address_meta
 	gst_buffer_add_net_control_message_meta
+	gst_buffer_get_net_address_meta
 	gst_net_address_meta_api_get_type
 	gst_net_address_meta_get_info
 	gst_net_client_clock_get_type