gst/: only write out registry if it has changed, fixes #338339

Original commit message from CVS:
* gst/gst.c:
* gst/gstregistry.c: (gst_registry_scan_path_level),
(gst_registry_scan_path):
* gst/gstregistry.h:
only write out registry if it has changed, fixes #338339

ChangeLog

@@ -29,7 +29,8 @@
 	* libs/gst/base/gstbasesink.c: (gst_base_sink_event):
 	* libs/gst/base/gstcollectpads.c: (gst_collect_pads_base_init),
 	(gst_collect_pads_is_collected), (gst_collect_pads_event):
-        more detailed debug and formatting cleanup
+        more detailed debug and formatting cleanup,
+        forward newsegments to src-pad (so that e.g. adder not eats them)
 
 2006-04-28  Stefan Kost  <ensonic@users.sf.net>
 

gst/gst.c

@@ -602,6 +602,7 @@ init_post (void)
     char *registry_file;
     const char *plugin_path;
     GstRegistry *default_registry;
+    gboolean changed = FALSE;
 
     default_registry = gst_registry_get_default ();
     registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
@@ -622,7 +623,7 @@ init_post (void)
       GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
       list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
       for (i = 0; list[i]; i++) {
-        gst_registry_scan_path (default_registry, list[i]);
+        changed |= gst_registry_scan_path (default_registry, list[i]);
       }
       g_strfreev (list);
     } else {
@@ -642,11 +643,11 @@ init_post (void)
        * system-installed ones */
       home_plugins = g_build_filename (g_get_home_dir (),
           ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
-      gst_registry_scan_path (default_registry, home_plugins);
+      changed |= gst_registry_scan_path (default_registry, home_plugins);
       g_free (home_plugins);
 
       /* add the main (installed) library path */
-      gst_registry_scan_path (default_registry, PLUGINDIR);
+      changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
     } else {
       char **list;
       int i;
@@ -654,12 +655,15 @@ init_post (void)
       GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
       list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
       for (i = 0; list[i]; i++) {
-        gst_registry_scan_path (default_registry, list[i]);
+        changed |= gst_registry_scan_path (default_registry, list[i]);
       }
       g_strfreev (list);
     }
 
-    gst_registry_xml_write_cache (default_registry, registry_file);
+    if (changed) {
+      GST_DEBUG ("writing registry cache");
+      gst_registry_xml_write_cache (default_registry, registry_file);
+    }
 
     _gst_registry_remove_cache_plugins (default_registry);
 

gst/gstregistry.c

@@ -736,7 +736,7 @@ gst_registry_lookup (GstRegistry * registry, const char *filename)
   return plugin;
 }
 
-static void
+static gboolean
 gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
     int level)
 {
@@ -745,10 +745,11 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
   gchar *filename;
   GstPlugin *plugin;
   GstPlugin *newplugin;
+  gboolean changed = FALSE;
 
   dir = g_dir_open (path, 0, NULL);
   if (!dir)
-    return;
+    return FALSE;
 
   while ((dirent = g_dir_read_name (dir))) {
     filename = g_strjoin ("/", path, dirent, NULL);
@@ -758,7 +759,7 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
     if (g_file_test (filename, G_FILE_TEST_IS_DIR)) {
       if (level > 0) {
         GST_LOG_OBJECT (registry, "found directory, recursing");
-        gst_registry_scan_path_level (registry, filename, level - 1);
+        changed |= gst_registry_scan_path_level (registry, filename, level - 1);
       } else {
         GST_LOG_OBJECT (registry,
             "found directory, but recursion level is too deep");
@@ -819,6 +820,7 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
           newplugin->registered = TRUE;
           gst_object_unref (newplugin);
         }
+        changed = TRUE;
       }
       gst_object_unref (plugin);
 
@@ -828,6 +830,7 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
       if (newplugin) {
         newplugin->registered = TRUE;
         gst_object_unref (newplugin);
+        changed = TRUE;
       }
     }
 
@@ -835,6 +838,10 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
   }
 
   g_dir_close (dir);
+
+  GST_DEBUG_OBJECT (registry, "registry changed? %d", changed);
+
+  return changed;
 }
 
 /**
@@ -845,15 +852,23 @@ gst_registry_scan_path_level (GstRegistry * registry, const gchar * path,
  * Add the given path to the registry. The syntax of the
  * path is specific to the registry. If the path has already been
  * added, do nothing.
+ *
+ * Returns: %TRUE if registry changed
  */
-void
+gboolean
 gst_registry_scan_path (GstRegistry * registry, const gchar * path)
 {
-  g_return_if_fail (GST_IS_REGISTRY (registry));
-  g_return_if_fail (path != NULL);
+  gboolean changed;
+
+  g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
+  g_return_val_if_fail (path != NULL, FALSE);
 
   GST_DEBUG_OBJECT (registry, "scanning path %s", path);
-  gst_registry_scan_path_level (registry, path, 10);
+  changed = gst_registry_scan_path_level (registry, path, 10);
+
+  GST_DEBUG_OBJECT (registry, "registry changed? %d", changed);
+
+  return changed;
 }
 
 void

gst/gstregistry.h

@@ -78,7 +78,7 @@ GType			gst_registry_get_type		(void);
 
 GstRegistry *           gst_registry_get_default        (void);
 
-void			gst_registry_scan_path		(GstRegistry *registry, const gchar *path);
+gboolean			gst_registry_scan_path		(GstRegistry *registry, const gchar *path);
 GList*			gst_registry_get_path_list	(GstRegistry *registry);
 
 gboolean		gst_registry_add_plugin		(GstRegistry *registry, GstPlugin *plugin);