gst/matroska/: Use gst_value_serialize() and gst_value_deserialize() for...

gst/matroska/: Use gst_value_serialize() and gst_value_deserialize() for transforming tags from some GType to a strin...

Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_metadata_id_simple_tag):
* gst/matroska/matroska-mux.c: (gst_matroska_mux_write_simple_tag),
(gst_matroska_mux_write_data):
Use gst_value_serialize() and gst_value_deserialize() for transforming
tags from some GType to a string and the other way around. The default
transformations in GLib don't include transformations from string to
number types.

ChangeLog

+2008-06-13  Sebastian Dröge  <slomo@circular-chaos.org>
+
+	* gst/matroska/matroska-demux.c:
+	(gst_matroska_demux_parse_metadata_id_simple_tag):
+	* gst/matroska/matroska-mux.c: (gst_matroska_mux_write_simple_tag),
+	(gst_matroska_mux_write_data):
+	Use gst_value_serialize() and gst_value_deserialize() for transforming
+	tags from some GType to a string and the other way around. The default
+	transformations in GLib don't include transformations from string to
+	number types.
+
 2008-06-13  Sebastian Dröge  <slomo@circular-chaos.org>
 	* gst/matroska/matroska-demux.c: (gst_matroska_demux_reset),

gst/matroska/matroska-demux.c

@@ -2255,21 +2255,18 @@ gst_matroska_demux_parse_metadata_id_simple_tag (GstMatroskaDemux * demux,
       const gchar *tagname_mkv = tag_conv[i].matroska_tagname;
 
       if (strcmp (tagname_mkv, tag) == 0) {
-        GValue src = { 0, };
         GValue dest = { 0, };
         GType dest_type = gst_tag_get_type (tagname_gst);
 
-        g_value_init (&src, G_TYPE_STRING);
-        g_value_set_string (&src, value);
         g_value_init (&dest, dest_type);
-        if (g_value_transform (&src, &dest)) {
+        if (gst_value_deserialize (&dest, value)) {
           gst_tag_list_add_values (*p_taglist, GST_TAG_MERGE_APPEND,
               tagname_gst, &dest, NULL);
         } else {
-          GST_WARNING_OBJECT (demux, "Can't transform tag '%s' with"
-              "value '%s' to target type", tag, value);
+          GST_WARNING_OBJECT (demux, "Can't transform tag '%s' with "
+              "value '%s' to target type '%s'", tag, value,
+              g_type_name (dest_type));
         }
-        g_value_unset (&src);
         g_value_unset (&dest);
         break;
       }

gst/matroska/matroska-mux.c

@@ -1546,24 +1546,21 @@ gst_matroska_mux_write_simple_tag (const GstTagList * list, const gchar * tag,
 
     if (strcmp (tagname_gst, tag) == 0) {
       GValue src = { 0, };
-      GValue dest = { 0, };
+      gchar *dest;
 
       if (!gst_tag_list_copy_value (&src, list, tag))
         break;
-      g_value_init (&dest, G_TYPE_STRING);
-      if (g_value_transform (&src, &dest)) {
+      if ((dest = gst_value_serialize (&src))) {
 
         simpletag_master = gst_ebml_write_master_start (ebml,
             GST_MATROSKA_ID_SIMPLETAG);
         gst_ebml_write_ascii (ebml, GST_MATROSKA_ID_TAGNAME, tagname_mkv);
-        gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_TAGSTRING,
-            g_value_get_string (&dest));
+        gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_TAGSTRING, dest);
         gst_ebml_write_master_finish (ebml, simpletag_master);
       } else {
         GST_WARNING ("Can't transform tag '%s' to string", tagname_mkv);
       }
       g_value_unset (&src);
-      g_value_unset (&dest);
       break;
     }
   }
@@ -1953,6 +1950,9 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad)
    * one for each keyframe or each second (for all-keyframe
    * streams), only the *first* video track. But that'll come later... */
 
+  /* TODO: index is useful for every track, should contain the number of
+   * the block in the cluster which contains the timestamp
+   */
   if (is_video_keyframe) {
     GstMatroskaIndex *idx;