X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gst%2Fgstmeta.c;h=89ebd9d3625174b259034e11c61f8cbb1f43f1df;hb=bb07550c2dc9a62dfaa58701d085f9ff7658d75f;hp=fe8159cbaecb98b5daa2979461098461068848e2;hpb=4c7dbde791fefae95b552e23c108680528561b83;p=platform%2Fupstream%2Fgstreamer.git

diff --git a/gst/gstmeta.c b/gst/gstmeta.c
index fe8159c..89ebd9d 100644
--- a/gst/gstmeta.c
+++ b/gst/gstmeta.c
@@ -21,6 +21,7 @@
 
 /**
  * SECTION:gstmeta
+ * @title: GstMeta
  * @short_description: Buffer metadata
  *
  * The #GstMeta structure should be included as the first member of a #GstBuffer
@@ -42,8 +43,6 @@
  *
  * See #GstBuffer for how the metadata can be added, retrieved and removed from
  * buffers.
- *
- * Last reviewed on 2012-03-28 (0.11.3)
  */
 #include "gst_private.h"
 
@@ -71,7 +70,7 @@ _priv_gst_meta_initialize (void)
 /**
  * gst_meta_api_type_register:
  * @api: an API to register
- * @tags: tags for @api
+ * @tags: (array zero-terminated=1): tags for @api
  *
  * Register and return a GType for the @api and associate it with
  * @tags.
@@ -139,6 +138,9 @@ gst_meta_api_type_get_tags (GType api)
 
   tags = g_type_get_qdata (api, g_quark_from_string ("tags"));
 
+  if (!tags[0])
+    return NULL;
+
   return (const gchar * const *) tags;
 }
 
@@ -147,16 +149,17 @@ gst_meta_api_type_get_tags (GType api)
  * @api: the type of the #GstMeta API
  * @impl: the name of the #GstMeta implementation
  * @size: the size of the #GstMeta structure
- * @init_func: (scope async) a #GstMetaInitFunction
- * @free_func: (scope async) a #GstMetaFreeFunction
- * @transform_func: (scope async) a #GstMetaTransformFunction
+ * @init_func: (scope async): a #GstMetaInitFunction
+ * @free_func: (scope async): a #GstMetaFreeFunction
+ * @transform_func: (scope async): a #GstMetaTransformFunction
  *
  * Register a new #GstMeta implementation.
  *
  * The same @info can be retrieved later with gst_meta_get_info() by using
  * @impl as the key.
  *
- * Returns: (transfer none): a #GstMetaInfo that can be used to access metadata.
+ * Returns: (transfer none) (nullable): a #GstMetaInfo that can be used to
+ * access metadata.
  */
 
 const GstMetaInfo *
@@ -171,6 +174,10 @@ gst_meta_register (GType api, const gchar * impl, gsize size,
   g_return_val_if_fail (impl != NULL, NULL);
   g_return_val_if_fail (size != 0, NULL);
 
+  if (init_func == NULL)
+    g_critical ("Registering meta implementation '%s' without init function",
+        impl);
+
   /* first try to register the implementation name. It's possible
    * that this fails because it was already registered. Don't warn,
    * glib did this for us already. */
@@ -204,8 +211,8 @@ gst_meta_register (GType api, const gchar * impl, gsize size,
  * Lookup a previously registered meta info structure by its implementation name
  * @impl.
  *
- * Returns: (transfer none): a #GstMetaInfo with @impl, or #NULL when no such
- * metainfo exists.
+ * Returns: (transfer none) (nullable): a #GstMetaInfo with @impl, or
+ * %NULL when no such metainfo exists.
  */
 const GstMetaInfo *
 gst_meta_get_info (const gchar * impl)