deviceprovider: It's (transfer none) not (transfer-none)

[platform/upstream/gstreamer.git] / gst / gstmeta.c

diff --git a/gst/gstmeta.c b/gst/gstmeta.c
index 954ff59..89ebd9d 100644 (file)
--- 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
@@ -69,7 +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.
@@ -157,7 +158,8 @@ gst_meta_api_type_get_tags (GType api)
  * 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 *
@@ -172,6 +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. */
@@ -205,8 +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)