meta: remove (de)serialize functions

Add a GType to the metadata to identify the GstMetaInfo.
We can remove the (de)serialize functions for the metadata because we can
register GTtype transform functions between various types to implement
serialization later.

gst/gstmeta.c

@@ -54,10 +54,7 @@ _gst_meta_init (void)
 const GstMetaInfo *
 gst_meta_register (const gchar * api, const gchar * impl, gsize size,
     GstMetaInitFunction init_func, GstMetaFreeFunction free_func,
-    GstMetaCopyFunction copy_func,
-    GstMetaTransformFunction transform_func,
-    GstMetaSerializeFunction serialize_func,
-    GstMetaDeserializeFunction deserialize_func)
+    GstMetaCopyFunction copy_func, GstMetaTransformFunction transform_func)
 {
   GstMetaInfo *info;
 
@@ -67,14 +64,12 @@ gst_meta_register (const gchar * api, const gchar * impl, gsize size,
 
   info = g_slice_new (GstMetaInfo);
   info->api = g_quark_from_string (api);
-  info->impl = g_quark_from_string (impl);
+  info->type = g_pointer_type_register_static (impl);
   info->size = size;
   info->init_func = init_func;
   info->free_func = free_func;
   info->copy_func = copy_func;
   info->transform_func = transform_func;
-  info->serialize_func = serialize_func;
-  info->deserialize_func = deserialize_func;
 
   GST_DEBUG ("register \"%s\" implementing \"%s\" of size %" G_GSIZE_FORMAT,
       api, impl, size);
@@ -151,8 +146,7 @@ gst_meta_timing_get_info (void)
         (GstMetaInitFunction) NULL,
         (GstMetaFreeFunction) NULL,
         (GstMetaCopyFunction) meta_timing_copy,
-        (GstMetaTransformFunction) NULL,
-        (GstMetaSerializeFunction) NULL, (GstMetaDeserializeFunction) NULL);
+        (GstMetaTransformFunction) NULL);
   }
   return meta_info;
 }

gst/gstmeta.h

@@ -83,45 +83,28 @@ typedef void (*GstMetaCopyFunction)     (GstBuffer *dest, GstMeta *meta,
 typedef void (*GstMetaTransformFunction) (GstBuffer *transbuf, GstMeta *meta,
                                           GstBuffer *buffer, gpointer data);
 
-/**
- * GstMetaSerializeFunction:
- * @meta: a #GstMeta
- */
-typedef gchar * (*GstMetaSerializeFunction) (GstMeta *meta);
-
-/**
- * GstMetaDeserializeFunction:
- * @meta: a #GstMeta
- */
-typedef gboolean (*GstMetaDeserializeFunction) (GstMeta *meta,
-                                                const gchar *s);
-
 /**
  * GstMetaInfo:
  * @api: tag indentifying the metadata structure and api
- * @impl: tag indentifying the implementor of the api
+ * @type: type indentifying the implementor of the api
  * @size: size of the metadata
  * @init_func: function for initializing the metadata
  * @free_func: function for freeing the metadata
  * @copy_func: function for copying the metadata
  * @transform_func: function for transforming the metadata
- * @serialize_func: function for serializing
- * @deserialize_func: function for deserializing
  *
  * The #GstMetaInfo provides information about a specific metadata
  * structure.
  */
 struct _GstMetaInfo {
   GQuark                     api;
-  GQuark                     impl;
+  GType                      type;
   gsize                      size;
 
   GstMetaInitFunction        init_func;
   GstMetaFreeFunction        free_func;
   GstMetaCopyFunction        copy_func;
   GstMetaTransformFunction   transform_func;
-  GstMetaSerializeFunction   serialize_func;
-  GstMetaDeserializeFunction deserialize_func;
 };
 
 void _gst_meta_init (void);
@@ -131,9 +114,7 @@ const GstMetaInfo *  gst_meta_register        (const gchar *api, const gchar *im
                                                GstMetaInitFunction        init_func,
                                                GstMetaFreeFunction        free_func,
                                                GstMetaCopyFunction        copy_func,
-                                               GstMetaTransformFunction   transform_func,
-                                               GstMetaSerializeFunction   serialize_func,
-                                               GstMetaDeserializeFunction deserialize_func);
+                                               GstMetaTransformFunction   transform_func);
 const GstMetaInfo *  gst_meta_get_info        (const gchar * impl);
 
 /* default metadata */