meta: Add API to register metas in two steps

And also remove the specific registration APIs for
serializable meta.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5830>

girs/Gst-1.0.gir

@@ -26040,48 +26040,6 @@ transform function.</doc>
           </parameter>
         </parameters>
       </function>
-      <function name="register_serializable" c:identifier="gst_meta_register_serializable" version="1.24" introspectable="0">
-        <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">Same as gst_meta_register() but also set serialize/deserialize functions.</doc>
-        <source-position filename="../subprojects/gstreamer/gst/gstmeta.h"/>
-        <return-value transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaInfo that can be used to access metadata.</doc>
-          <type name="MetaInfo" c:type="const GstMetaInfo*"/>
-        </return-value>
-        <parameters>
-          <parameter name="api" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the type of the #GstMeta API</doc>
-            <type name="GType" c:type="GType"/>
-          </parameter>
-          <parameter name="impl" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the name of the #GstMeta implementation</doc>
-            <type name="utf8" c:type="const gchar*"/>
-          </parameter>
-          <parameter name="size" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the size of the #GstMeta structure</doc>
-            <type name="gsize" c:type="gsize"/>
-          </parameter>
-          <parameter name="init_func" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaInitFunction</doc>
-            <type name="MetaInitFunction" c:type="GstMetaInitFunction"/>
-          </parameter>
-          <parameter name="free_func" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaFreeFunction</doc>
-            <type name="MetaFreeFunction" c:type="GstMetaFreeFunction"/>
-          </parameter>
-          <parameter name="transform_func" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaTransformFunction</doc>
-            <type name="MetaTransformFunction" c:type="GstMetaTransformFunction"/>
-          </parameter>
-          <parameter name="serialize_func" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaSerializeFunction</doc>
-            <type name="MetaSerializeFunction" c:type="GstMetaSerializeFunction"/>
-          </parameter>
-          <parameter name="deserialize_func" transfer-ownership="none">
-            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaDeserializeFunction</doc>
-            <type name="MetaDeserializeFunction" c:type="GstMetaDeserializeFunction"/>
-          </parameter>
-        </parameters>
-      </function>
     </record>
     <callback name="MetaClearFunction" c:type="GstMetaClearFunction" version="1.24">
       <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.h">Clears the content of the meta. This will be called by the GstBufferPool
@@ -26223,6 +26181,75 @@ pooled metas.</doc>
           </instance-parameter>
         </parameters>
       </method>
+      <method name="register" c:identifier="gst_meta_info_register" version="1.24">
+        <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">Registers a new meta.
+
+Use the structure returned by gst_meta_info_new(), it consumes it and the
+structure shouldnt be used after. The one returned by the function can be
+kept.</doc>
+        <source-position filename="../subprojects/gstreamer/gst/gstmeta.h"/>
+        <return-value transfer-ownership="none">
+          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the registered meta</doc>
+          <type name="MetaInfo" c:type="const GstMetaInfo*"/>
+        </return-value>
+        <parameters>
+          <instance-parameter name="info" transfer-ownership="full">
+            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a new #GstMetaInfo created by gst_meta_info_new()</doc>
+            <type name="MetaInfo" c:type="GstMetaInfo*"/>
+          </instance-parameter>
+        </parameters>
+      </method>
+      <function name="new" c:identifier="gst_meta_info_new" version="1.24" introspectable="0">
+        <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">Creates a new structure that needs to be filled before being
+registered.  This structure should filled and then registered with
+gst_meta_info_register().
+
+Example:
+```c
+const GstMetaInfo *
+gst_my_meta_get_info (void)
+{
+  static const GstMetaInfo *meta_info = NULL;
+
+  if (g_once_init_enter ((GstMetaInfo **) &amp; meta_info)) {
+    GstMetaInfo *info = gst_meta_info_new (
+      gst_my_meta_api_get_type (),
+        "GstMyMeta",
+       sizeof (GstMyMeta));
+    const GstMetaInfo *meta = NULL;
+
+    info-&gt;init_func = my_meta_init;
+    info-&gt;free_func = my_meta_free;
+    info-&gt;transform_func = my_meta_transform;
+    info-&gt;serialize_func = my_meta_serialize;
+    info-&gt;deserialize_func = my_meta_deserialize;
+    meta = gst_meta_info_register (info);
+    g_once_init_leave ((GstMetaInfo **) &amp; meta_info, (GstMetaInfo *) meta);
+  }
+
+  return meta_info;
+}
+```</doc>
+        <source-position filename="../subprojects/gstreamer/gst/gstmeta.h"/>
+        <return-value>
+          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a new #GstMetaInfo that needs to be filled</doc>
+          <type name="MetaInfo" c:type="GstMetaInfo*"/>
+        </return-value>
+        <parameters>
+          <parameter name="api" transfer-ownership="none">
+            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the type of the #GstMeta API</doc>
+            <type name="GType" c:type="GType"/>
+          </parameter>
+          <parameter name="impl" transfer-ownership="none">
+            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the name of the #GstMeta implementation</doc>
+            <type name="utf8" c:type="const gchar*"/>
+          </parameter>
+          <parameter name="size" transfer-ownership="none">
+            <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the size of the #GstMeta structure</doc>
+            <type name="gsize" c:type="gsize"/>
+          </parameter>
+        </parameters>
+      </function>
     </record>
     <callback name="MetaInitFunction" c:type="GstMetaInitFunction">
       <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.h">Function called when @meta is initialized in @buffer.</doc>
@@ -52327,48 +52354,6 @@ transform function.</doc>
         </parameter>
       </parameters>
     </function>
-    <function name="meta_register_serializable" c:identifier="gst_meta_register_serializable" moved-to="Meta.register_serializable" version="1.24" introspectable="0">
-      <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">Same as gst_meta_register() but also set serialize/deserialize functions.</doc>
-      <source-position filename="../subprojects/gstreamer/gst/gstmeta.h"/>
-      <return-value transfer-ownership="none">
-        <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaInfo that can be used to access metadata.</doc>
-        <type name="MetaInfo" c:type="const GstMetaInfo*"/>
-      </return-value>
-      <parameters>
-        <parameter name="api" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the type of the #GstMeta API</doc>
-          <type name="GType" c:type="GType"/>
-        </parameter>
-        <parameter name="impl" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the name of the #GstMeta implementation</doc>
-          <type name="utf8" c:type="const gchar*"/>
-        </parameter>
-        <parameter name="size" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">the size of the #GstMeta structure</doc>
-          <type name="gsize" c:type="gsize"/>
-        </parameter>
-        <parameter name="init_func" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaInitFunction</doc>
-          <type name="MetaInitFunction" c:type="GstMetaInitFunction"/>
-        </parameter>
-        <parameter name="free_func" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaFreeFunction</doc>
-          <type name="MetaFreeFunction" c:type="GstMetaFreeFunction"/>
-        </parameter>
-        <parameter name="transform_func" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaTransformFunction</doc>
-          <type name="MetaTransformFunction" c:type="GstMetaTransformFunction"/>
-        </parameter>
-        <parameter name="serialize_func" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaSerializeFunction</doc>
-          <type name="MetaSerializeFunction" c:type="GstMetaSerializeFunction"/>
-        </parameter>
-        <parameter name="deserialize_func" transfer-ownership="none">
-          <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstmeta.c">a #GstMetaDeserializeFunction</doc>
-          <type name="MetaDeserializeFunction" c:type="GstMetaDeserializeFunction"/>
-        </parameter>
-      </parameters>
-    </function>
     <function name="mini_object_replace" c:identifier="gst_mini_object_replace" moved-to="MiniObject.replace">
       <doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstminiobject.c">Atomically modifies a pointer to point to a new mini-object.
 The reference count of @olddata is decreased and the reference count of

subprojects/gst-plugins-bad/gst-libs/gst/analytics/gstanalyticsmeta.c

@@ -371,14 +371,14 @@ gst_analytics_relation_meta_get_info (void)
 {
   static const GstMetaInfo *info = NULL;
   if (g_once_init_enter ((GstMetaInfo **) & info)) {
-    GstMetaInfo *meta = (GstMetaInfo *)
+    GstMetaInfo *meta = gst_meta_info_new (GST_ANALYTICS_RELATION_META_API_TYPE,
-        gst_meta_register (GST_ANALYTICS_RELATION_META_API_TYPE,
         "GstAnalyticsRelationMeta",
-        sizeof (GstAnalyticsRelationMeta),
+        sizeof (GstAnalyticsRelationMeta));
-        gst_analytics_relation_meta_init,
+    meta->init_func = gst_analytics_relation_meta_init;
-        gst_analytics_relation_meta_free,
+    meta->free_func = gst_analytics_relation_meta_free;
-        gst_analytics_relation_meta_transform);
+    meta->transform_func = gst_analytics_relation_meta_transform;
     meta->clear_func = gst_analytics_relation_meta_clear;
+    meta = (GstMetaInfo *) gst_meta_info_register (meta);
     g_once_init_leave ((GstMetaInfo **) & info, (GstMetaInfo *) meta);
   }
   return info;

subprojects/gst-plugins-base/gst-libs/gst/audio/gstaudiometa.c

@@ -588,14 +588,16 @@ gst_audio_meta_get_info (void)
   static const GstMetaInfo *audio_meta_info = NULL;
 
   if (g_once_init_enter ((GstMetaInfo **) & audio_meta_info)) {
-    const GstMetaInfo *meta =
+    GstMetaInfo *info = gst_meta_info_new (GST_AUDIO_META_API_TYPE,
-        gst_meta_register_serializable (GST_AUDIO_META_API_TYPE,
+        "GstAudioMeta", sizeof (GstAudioMeta));
-        "GstAudioMeta", sizeof (GstAudioMeta),
+
-        gst_audio_meta_init,
+    info->init_func = gst_audio_meta_init;
-        gst_audio_meta_free,
+    info->free_func = gst_audio_meta_free;
-        gst_audio_meta_transform,
+    info->transform_func = gst_audio_meta_transform;
-        gst_audio_meta_serialize,
+    info->serialize_func = gst_audio_meta_serialize;
-        gst_audio_meta_deserialize);
+    info->deserialize_func = gst_audio_meta_deserialize;
+    const GstMetaInfo *meta = gst_meta_info_register (info);
+
     g_once_init_leave ((GstMetaInfo **) & audio_meta_info,
         (GstMetaInfo *) meta);
   }

subprojects/gst-plugins-base/gst-libs/gst/video/gstvideometa.c

@@ -252,11 +252,14 @@ gst_video_meta_get_info (void)
   static const GstMetaInfo *video_meta_info = NULL;
 
   if (g_once_init_enter ((GstMetaInfo **) & video_meta_info)) {
-    const GstMetaInfo *meta =
+    GstMetaInfo *info = gst_meta_info_new (GST_VIDEO_META_API_TYPE,
-        gst_meta_register_serializable (GST_VIDEO_META_API_TYPE, "GstVideoMeta",
+        "GstVideoMeta",
-        sizeof (GstVideoMeta), (GstMetaInitFunction) gst_video_meta_init,
+        sizeof (GstVideoMeta));
-        (GstMetaFreeFunction) NULL, gst_video_meta_transform,
+    info->init_func = gst_video_meta_init;
-        video_meta_serialize, video_meta_deserialize);
+    info->transform_func = gst_video_meta_transform;
+    info->serialize_func = video_meta_serialize;
+    info->deserialize_func = video_meta_deserialize;
+    const GstMetaInfo *meta = gst_meta_info_register (info);
     g_once_init_leave ((GstMetaInfo **) & video_meta_info,
         (GstMetaInfo *) meta);
   }

subprojects/gstreamer/gst/gstbuffer.c

@@ -2918,16 +2918,17 @@ gst_reference_timestamp_meta_get_info (void)
   static const GstMetaInfo *meta_info = NULL;
 
   if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
-    const GstMetaInfo *meta =
+    const GstMetaInfo *meta = NULL;
-        gst_meta_register_serializable
+    GstMetaInfo *info =
-        (gst_reference_timestamp_meta_api_get_type (),
+        gst_meta_info_new (gst_reference_timestamp_meta_api_get_type (),
         "GstReferenceTimestampMeta",
-        sizeof (GstReferenceTimestampMeta),
+        sizeof (GstReferenceTimestampMeta));
-        (GstMetaInitFunction) _gst_reference_timestamp_meta_init,
+    info->init_func = (GstMetaInitFunction) _gst_reference_timestamp_meta_init;
-        (GstMetaFreeFunction) _gst_reference_timestamp_meta_free,
+    info->free_func = (GstMetaFreeFunction) _gst_reference_timestamp_meta_free;
-        _gst_reference_timestamp_meta_transform,
+    info->transform_func = _gst_reference_timestamp_meta_transform;
-        timestamp_meta_serialize,
+    info->serialize_func = timestamp_meta_serialize;
-        timestamp_meta_deserialize);
+    info->deserialize_func = timestamp_meta_deserialize;
+    meta = gst_meta_info_register (info);
     g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) meta);
   }
 

subprojects/gstreamer/gst/gstmeta.c

@@ -301,8 +301,9 @@ gst_meta_register_custom (const gchar * name, const gchar ** tags,
 {
   gchar *api_name = g_strdup_printf ("%s-api", name);
   GType api;
-  GstMetaInfoImpl *info;
+  GstMetaInfo *info;
-  GstMetaInfo *ret = NULL;
+  GstMetaInfoImpl *impl;
+  const GstMetaInfo *ret = NULL;
 
   g_return_val_if_fail (tags != NULL, NULL);
   g_return_val_if_fail (name != NULL, NULL);
@@ -312,20 +313,24 @@ gst_meta_register_custom (const gchar * name, const gchar ** tags,
   if (api == G_TYPE_INVALID)
     goto done;
 
-  info = (GstMetaInfoImpl *) gst_meta_register_serializable (api, name,
+  info = gst_meta_info_new (api, name, sizeof (GstCustomMeta));
-      sizeof (GstCustomMeta),
+  if (info == NULL)
-      custom_init_func, custom_free_func, custom_transform_func,
-      custom_serialize_func, custom_deserialize_func);
-
-  if (!info)
     goto done;
 
-  info->is_custom = TRUE;
+  impl = (GstMetaInfoImpl *) info;
-  info->custom_transform_func = transform_func;
-  info->custom_transform_user_data = user_data;
-  info->custom_transform_destroy_notify = destroy_data;
 
-  ret = (GstMetaInfo *) info;
+  info->init_func = custom_init_func;
+  info->free_func = custom_free_func;
+  info->transform_func = custom_transform_func;
+  info->serialize_func = custom_serialize_func;
+  info->deserialize_func = custom_deserialize_func;
+
+  impl->is_custom = TRUE;
+  impl->custom_transform_func = transform_func;
+  impl->custom_transform_user_data = user_data;
+  impl->custom_transform_destroy_notify = destroy_data;
+
+  ret = gst_meta_info_register (info);
 
 done:
   return ret;
@@ -411,27 +416,14 @@ gst_meta_register_internal (GType api, const gchar * impl, gsize size,
     GstMetaDeserializeFunction deserialize_func)
 {
   GstMetaInfo *info;
-  GType type;
-
-  g_return_val_if_fail (api != 0, NULL);
-  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
+  info = gst_meta_info_new (api, impl, size);
-   * that this fails because it was already registered. Don't warn,
+  if (info == NULL)
-   * glib did this for us already. */
-  type = g_pointer_type_register_static (impl);
-  if (type == G_TYPE_INVALID)
     return NULL;
 
-  info = (GstMetaInfo *) g_new0 (GstMetaInfoImpl, 1);
-  info->api = api;
-  info->type = type;
-  info->size = size;
   info->init_func = init_func;
   info->free_func = free_func;
   info->transform_func = transform_func;
@@ -439,16 +431,7 @@ gst_meta_register_internal (GType api, const gchar * impl, gsize size,
   info->deserialize_func = deserialize_func;
   ((GstMetaInfoImpl *) info)->is_custom = FALSE;
 
-  GST_CAT_DEBUG (GST_CAT_META,
+  return gst_meta_info_register (info);
-      "register \"%s\" implementing \"%s\" of size %" G_GSIZE_FORMAT, impl,
-      g_type_name (api), size);
-
-  g_rw_lock_writer_lock (&lock);
-  g_hash_table_insert (metainfo, (gpointer) g_intern_string (impl),
-      (gpointer) info);
-  g_rw_lock_writer_unlock (&lock);
-
-  return info;
 }
 
 /**
@@ -478,33 +461,103 @@ gst_meta_register (GType api, const gchar * impl, gsize size,
 }
 
 /**
- * gst_meta_register_serializable: (skip):
+ * gst_meta_info_new:
- * @api: the type of the #GstMeta API
+ * @api:  the type of the #GstMeta API
  * @impl: the name of the #GstMeta implementation
  * @size: the size of the #GstMeta structure
- * @init_func: a #GstMetaInitFunction
- * @free_func: a #GstMetaFreeFunction
- * @transform_func: a #GstMetaTransformFunction
- * @serialize_func: a #GstMetaSerializeFunction
- * @deserialize_func: a #GstMetaDeserializeFunction
  *
- * Same as gst_meta_register() but also set serialize/deserialize functions.
+ * Creates a new structure that needs to be filled before being
+ * registered.  This structure should filled and then registered with
+ * gst_meta_info_register().
  *
- * Returns: (transfer none): a #GstMetaInfo that can be used to access metadata.
+ * Example:
+ * ```c
+ * const GstMetaInfo *
+ * gst_my_meta_get_info (void)
+ * {
+ *   static const GstMetaInfo *meta_info = NULL;
+ *
+ *   if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
+ *     GstMetaInfo *info = gst_meta_info_new (
+ *       gst_my_meta_api_get_type (),
+ *         "GstMyMeta",
+ *        sizeof (GstMyMeta));
+ *     const GstMetaInfo *meta = NULL;
+ *
+ *     info->init_func = my_meta_init;
+ *     info->free_func = my_meta_free;
+ *     info->transform_func = my_meta_transform;
+ *     info->serialize_func = my_meta_serialize;
+ *     info->deserialize_func = my_meta_deserialize;
+ *     meta = gst_meta_info_register (info);
+ *     g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) meta);
+ *   }
+ *
+ *   return meta_info;
+ * }
+ * ```
+ *
+ * Returns: a new #GstMetaInfo that needs to be filled
  *
  * Since: 1.24
  */
-const GstMetaInfo *
+
-gst_meta_register_serializable (GType api, const gchar * impl, gsize size,
+GstMetaInfo *
-    GstMetaInitFunction init_func, GstMetaFreeFunction free_func,
+gst_meta_info_new (GType api, const gchar * impl, gsize size)
-    GstMetaTransformFunction transform_func,
-    GstMetaSerializeFunction serialize_func,
-    GstMetaDeserializeFunction deserialize_func)
 {
-  g_return_val_if_fail (serialize_func != NULL, NULL);
+  GType type;
-  g_return_val_if_fail (deserialize_func != NULL, NULL);
+  GstMetaInfo *info;
-  return gst_meta_register_internal (api, impl, size, init_func, free_func,
+
-      transform_func, serialize_func, deserialize_func);
+  g_return_val_if_fail (api != 0, NULL);
+  g_return_val_if_fail (impl != NULL, NULL);
+  g_return_val_if_fail (size != 0, NULL);
+
+  /* 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. */
+  type = g_pointer_type_register_static (impl);
+
+  info = (GstMetaInfo *) g_new0 (GstMetaInfoImpl, 1);
+  info->api = api;
+  info->type = type;
+  info->size = size;
+
+  return info;
+}
+
+/**
+ * gst_meta_info_register:
+ * @info: (transfer full): a new #GstMetaInfo created by gst_meta_info_new()
+ *
+ * Registers a new meta.
+ *
+ * Use the structure returned by gst_meta_info_new(), it consumes it and the
+ * structure shouldnt be used after. The one returned by the function can be
+ * kept.
+ *
+ * Returns: (transfer none): the registered meta
+ *
+ * Since: 1.24
+ */
+
+const GstMetaInfo *
+gst_meta_info_register (GstMetaInfo * info)
+{
+  if (info->type == G_TYPE_INVALID) {
+    g_free (info);
+    return NULL;
+  }
+
+  GST_CAT_DEBUG (GST_CAT_META,
+      "register \"%s\" implementing \"%s\" of size %" G_GSIZE_FORMAT,
+      g_type_name (info->type), g_type_name (info->api), info->size);
+
+  g_rw_lock_writer_lock (&lock);
+  g_hash_table_insert (metainfo,
+      (gpointer) g_intern_string (g_type_name (info->type)), (gpointer) info);
+  g_rw_lock_writer_unlock (&lock);
+
+  return info;
 }
 
 /**

subprojects/gstreamer/gst/gstmeta.h

@@ -367,13 +367,11 @@ const GstMetaInfo *  gst_meta_register          (GType api, const gchar *impl,
                                                  GstMetaTransformFunction transform_func);
 
 GST_API
-const GstMetaInfo *  gst_meta_register_serializable (GType api, const gchar *impl,
+GstMetaInfo *        gst_meta_info_new (GType api,
-                                                     gsize size,
+                                        const gchar *impl,
-                                                     GstMetaInitFunction init_func,
+                                        gsize size);
-                                                     GstMetaFreeFunction free_func,
+GST_API
-                                                     GstMetaTransformFunction transform_func,
+const GstMetaInfo *  gst_meta_info_register (GstMetaInfo *info);
-                                                     GstMetaSerializeFunction serialize_func,
-                                                     GstMetaDeserializeFunction deserialize_func);
 
 GST_API
 const GstMetaInfo *  gst_meta_register_custom   (const gchar *name, const gchar **tags,