2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 David A. Schleef <ds@schleef.org>
6 * gstregistry.c: handle registry
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
26 * @short_description: Abstract base class for management of #GstPlugin objects
27 * @see_also: #GstPlugin, #GstPluginFeature
29 * One registry holds the metadata of a set of plugins.
31 * <emphasis role="bold">Design:</emphasis>
33 * The #GstRegistry object is a list of plugins and some functions for dealing
34 * with them. Each #GstPlugin is matched 1-1 with a file on disk, and may or may
35 * not be loaded at a given time. There may be multiple #GstRegistry objects,
36 * but the "default registry" is the only object that has any meaning to the
39 * The registry file is actually a cache of plugin information. This is
40 * unlike versions prior to 0.10, where the registry file was the primary source
41 * of plugin information, and was created by the gst-register command.
43 * The primary source, at all times, of plugin information is each plugin file
44 * itself. Thus, if an application wants information about a particular plugin,
45 * or wants to search for a feature that satisfies given criteria, the primary
46 * means of doing so is to load every plugin and look at the resulting
47 * information that is gathered in the default registry. Clearly, this is a time
48 * consuming process, so we cache information in the registry file. The format
49 * and location of the cache file is internal to gstreamer.
51 * On startup, plugins are searched for in the plugin search path. The following
52 * locations are checked in this order:
55 * <para>location from --gst-plugin-path commandline option.</para>
58 * <para>the GST_PLUGIN_PATH environment variable.</para>
61 * <para>the GST_PLUGIN_SYSTEM_PATH environment variable.</para>
64 * <para>default locations (if GST_PLUGIN_SYSTEM_PATH is not set). Those
65 * default locations are:
66 * <filename>~/.gstreamer-$GST_MAJORMINOR/plugins/</filename>
67 * and <filename>$prefix/libs/gstreamer-$GST_MAJORMINOR/</filename>.
71 * The registry cache file is loaded from
72 * <filename>~/.gstreamer-$GST_MAJORMINOR/registry-$ARCH.bin</filename> or the
73 * file listed in the GST_REGISTRY env var. One reason to change the registry
74 * location is for testing.
76 * For each plugin that is found in the plugin search path, there could be 3
77 * possibilities for cached information:
80 * <para>the cache may not contain information about a given file.</para>
83 * <para>the cache may have stale information.</para>
86 * <para>the cache may have current information.</para>
90 * In the first two cases, the plugin is loaded and the cache updated. In
91 * addition to these cases, the cache may have entries for plugins that are not
92 * relevant to the current process. These are marked as not available to the
93 * current process. If the cache is updated for whatever reason, it is marked
96 * A dirty cache is written out at the end of initialization. Each entry is
97 * checked to make sure the information is minimally valid. If not, the entry is
100 * <emphasis role="bold">Implementation notes:</emphasis>
102 * The "cache" and "default registry" are different concepts and can represent
103 * different sets of plugins. For various reasons, at init time, the cache is
104 * stored in the default registry, and plugins not relevant to the current
105 * process are marked with the %GST_PLUGIN_FLAG_CACHED bit. These plugins are
106 * removed at the end of intitialization.
112 #include "gstconfig.h"
113 #include "gst_private.h"
115 #include <sys/types.h>
116 #include <sys/stat.h>
125 #include <glib/gstdio.h>
128 #include "gsterror.h"
129 #include "gstregistry.h"
130 #include "gstmarshal.h"
131 #include "gstfilter.h"
133 #include "gstpluginloader.h"
135 #include "gst-i18n-lib.h"
138 #include "glib-compat-private.h"
142 extern HMODULE _priv_gst_dll_handle;
145 #define GST_CAT_DEFAULT GST_CAT_REGISTRY
147 struct _GstRegistryPrivate
149 /* updated whenever the feature list changes */
151 /* speedup for searching features */
152 GList *element_factory_list;
154 GList *typefind_factory_list;
158 /* the one instance of the default registry and the mutex protecting the
160 static GStaticMutex _gst_registry_mutex = G_STATIC_MUTEX_INIT;
161 static GstRegistry *_gst_registry_default = NULL;
164 #define DEFAULT_FORK TRUE
166 /* control the behaviour of registry rebuild */
167 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
168 /* List of plugins that need preloading/reloading after scanning registry */
169 extern GSList *_priv_gst_preload_plugins;
171 #ifndef GST_DISABLE_REGISTRY
172 /*set to TRUE when registry needn't to be updated */
173 gboolean _priv_gst_disable_registry_update = FALSE;
174 extern GList *_priv_gst_plugin_paths;
176 /* Set to TRUE when the registry cache should be disabled */
177 gboolean _gst_disable_registry_cache = FALSE;
180 /* Element signals and args */
188 static void gst_registry_finalize (GObject * object);
190 static guint gst_registry_signals[LAST_SIGNAL] = { 0 };
192 static GstPluginFeature *gst_registry_lookup_feature_locked (GstRegistry *
193 registry, const char *name);
194 static GstPlugin *gst_registry_lookup_bn_locked (GstRegistry * registry,
195 const char *basename);
197 G_DEFINE_TYPE (GstRegistry, gst_registry, GST_TYPE_OBJECT);
198 static GstObjectClass *parent_class = NULL;
201 gst_registry_class_init (GstRegistryClass * klass)
203 GObjectClass *gobject_class;
205 gobject_class = (GObjectClass *) klass;
207 parent_class = g_type_class_peek_parent (klass);
208 g_type_class_add_private (klass, sizeof (GstRegistryPrivate));
211 * GstRegistry::plugin-added:
212 * @registry: the registry that emitted the signal
213 * @plugin: the plugin that has been added
215 * Signals that a plugin has been added to the registry (possibly
216 * replacing a previously-added one by the same name)
218 gst_registry_signals[PLUGIN_ADDED] =
219 g_signal_new ("plugin-added", G_TYPE_FROM_CLASS (klass),
220 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, plugin_added), NULL,
221 NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER);
224 * GstRegistry::feature-added:
225 * @registry: the registry that emitted the signal
226 * @feature: the feature that has been added
228 * Signals that a feature has been added to the registry (possibly
229 * replacing a previously-added one by the same name)
231 gst_registry_signals[FEATURE_ADDED] =
232 g_signal_new ("feature-added", G_TYPE_FROM_CLASS (klass),
233 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, feature_added),
234 NULL, NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER);
236 gobject_class->finalize = gst_registry_finalize;
240 gst_registry_init (GstRegistry * registry)
242 registry->feature_hash = g_hash_table_new (g_str_hash, g_str_equal);
243 registry->basename_hash = g_hash_table_new (g_str_hash, g_str_equal);
245 G_TYPE_INSTANCE_GET_PRIVATE (registry, GST_TYPE_REGISTRY,
250 gst_registry_finalize (GObject * object)
252 GstRegistry *registry = GST_REGISTRY (object);
256 plugins = registry->plugins;
257 registry->plugins = NULL;
259 GST_DEBUG_OBJECT (registry, "registry finalize");
262 GstPlugin *plugin = p->data;
265 GST_LOG_OBJECT (registry, "removing plugin %s",
266 gst_plugin_get_name (plugin));
267 gst_object_unref (plugin);
271 g_list_free (plugins);
273 features = registry->features;
274 registry->features = NULL;
278 GstPluginFeature *feature = f->data;
281 GST_LOG_OBJECT (registry, "removing feature %p (%s)",
282 feature, gst_plugin_feature_get_name (feature));
283 gst_object_unref (feature);
287 g_list_free (features);
289 g_hash_table_destroy (registry->feature_hash);
290 registry->feature_hash = NULL;
291 g_hash_table_destroy (registry->basename_hash);
292 registry->basename_hash = NULL;
294 if (registry->priv->element_factory_list) {
295 GST_DEBUG_OBJECT (registry, "Cleaning up cached element factory list");
296 gst_plugin_feature_list_free (registry->priv->element_factory_list);
299 if (registry->priv->typefind_factory_list) {
300 GST_DEBUG_OBJECT (registry, "Cleaning up cached typefind factory list");
301 gst_plugin_feature_list_free (registry->priv->typefind_factory_list);
304 G_OBJECT_CLASS (parent_class)->finalize (object);
308 * gst_registry_get_default:
310 * Retrieves the default registry. The caller does not own a reference on the
311 * registry, as it is alive as long as GStreamer is initialized.
313 * Returns: (transfer none): The default #GstRegistry.
316 gst_registry_get_default (void)
318 GstRegistry *registry;
320 g_static_mutex_lock (&_gst_registry_mutex);
321 if (G_UNLIKELY (!_gst_registry_default)) {
322 _gst_registry_default = g_object_newv (GST_TYPE_REGISTRY, 0, NULL);
323 gst_object_ref_sink (GST_OBJECT_CAST (_gst_registry_default));
325 registry = _gst_registry_default;
326 g_static_mutex_unlock (&_gst_registry_mutex);
332 * gst_registry_add_path:
333 * @registry: the registry to add the path to
334 * @path: the path to add to the registry
336 * Add the given path to the registry. The syntax of the
337 * path is specific to the registry. If the path has already been
341 gst_registry_add_path (GstRegistry * registry, const gchar * path)
343 g_return_if_fail (GST_IS_REGISTRY (registry));
344 g_return_if_fail (path != NULL);
346 if (strlen (path) == 0)
349 GST_OBJECT_LOCK (registry);
350 if (g_list_find_custom (registry->paths, path, (GCompareFunc) strcmp))
353 GST_INFO ("Adding plugin path: \"%s\"", path);
354 registry->paths = g_list_append (registry->paths, g_strdup (path));
355 GST_OBJECT_UNLOCK (registry);
361 GST_INFO ("Ignoring empty plugin path");
366 g_warning ("path %s already added to registry", path);
367 GST_OBJECT_UNLOCK (registry);
373 * gst_registry_get_path_list:
374 * @registry: the registry to get the pathlist of
376 * Get the list of paths for the given registry.
378 * Returns: (transfer container) (element-type char*): A #GList of paths as
379 * strings. g_list_free after use.
384 gst_registry_get_path_list (GstRegistry * registry)
388 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
390 GST_OBJECT_LOCK (registry);
391 /* We don't need to copy the strings, because they won't be deleted
392 * as long as the GstRegistry is around */
393 list = g_list_copy (registry->paths);
394 GST_OBJECT_UNLOCK (registry);
401 * gst_registry_add_plugin:
402 * @registry: the registry to add the plugin to
403 * @plugin: (transfer full): the plugin to add
405 * Add the plugin to the registry. The plugin-added signal will be emitted.
406 * This function will sink @plugin.
408 * Returns: TRUE on success.
413 gst_registry_add_plugin (GstRegistry * registry, GstPlugin * plugin)
415 GstPlugin *existing_plugin;
417 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
418 g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
420 GST_OBJECT_LOCK (registry);
421 if (G_LIKELY (plugin->basename)) {
422 /* we have a basename, see if we find the plugin */
424 gst_registry_lookup_bn_locked (registry, plugin->basename);
425 if (existing_plugin) {
426 GST_DEBUG_OBJECT (registry,
427 "Replacing existing plugin \"%s\" %p with new plugin %p for filename \"%s\"",
428 GST_STR_NULL (existing_plugin->filename), existing_plugin, plugin,
429 GST_STR_NULL (plugin->filename));
430 /* If the new plugin is blacklisted and the existing one isn't cached, do not
431 * accept if it's from a different location than the existing one */
432 if ((plugin->flags & GST_PLUGIN_FLAG_BLACKLISTED) &&
433 strcmp (plugin->filename, existing_plugin->filename)) {
434 GST_WARNING_OBJECT (registry,
435 "Not replacing plugin because new one (%s) is blacklisted but for a different location than existing one (%s)",
436 plugin->filename, existing_plugin->filename);
437 gst_object_unref (plugin);
438 GST_OBJECT_UNLOCK (registry);
441 registry->plugins = g_list_remove (registry->plugins, existing_plugin);
442 if (G_LIKELY (existing_plugin->basename))
443 g_hash_table_remove (registry->basename_hash,
444 existing_plugin->basename);
445 gst_object_unref (existing_plugin);
449 GST_DEBUG_OBJECT (registry, "adding plugin %p for filename \"%s\"",
450 plugin, GST_STR_NULL (plugin->filename));
452 registry->plugins = g_list_prepend (registry->plugins, plugin);
453 if (G_LIKELY (plugin->basename))
454 g_hash_table_replace (registry->basename_hash, plugin->basename, plugin);
456 gst_object_ref_sink (plugin);
457 GST_OBJECT_UNLOCK (registry);
459 GST_LOG_OBJECT (registry, "emitting plugin-added for filename \"%s\"",
460 GST_STR_NULL (plugin->filename));
461 g_signal_emit (registry, gst_registry_signals[PLUGIN_ADDED], 0, plugin);
467 gst_registry_remove_features_for_plugin_unlocked (GstRegistry * registry,
472 g_return_if_fail (GST_IS_REGISTRY (registry));
473 g_return_if_fail (GST_IS_PLUGIN (plugin));
475 /* Remove all features for this plugin */
476 f = registry->features;
478 GList *next = g_list_next (f);
479 GstPluginFeature *feature = f->data;
481 if (G_UNLIKELY (feature && feature->plugin == plugin)) {
482 GST_DEBUG_OBJECT (registry, "removing feature %p (%s) for plugin %p (%s)",
483 feature, gst_plugin_feature_get_name (feature), plugin,
486 registry->features = g_list_delete_link (registry->features, f);
487 g_hash_table_remove (registry->feature_hash, feature->name);
488 gst_object_unref (feature);
492 registry->priv->cookie++;
496 * gst_registry_remove_plugin:
497 * @registry: the registry to remove the plugin from
498 * @plugin: (transfer none): the plugin to remove
500 * Remove the plugin from the registry.
505 gst_registry_remove_plugin (GstRegistry * registry, GstPlugin * plugin)
507 g_return_if_fail (GST_IS_REGISTRY (registry));
508 g_return_if_fail (GST_IS_PLUGIN (plugin));
510 GST_DEBUG_OBJECT (registry, "removing plugin %p (%s)",
511 plugin, gst_plugin_get_name (plugin));
513 GST_OBJECT_LOCK (registry);
514 registry->plugins = g_list_remove (registry->plugins, plugin);
515 if (G_LIKELY (plugin->basename))
516 g_hash_table_remove (registry->basename_hash, plugin->basename);
517 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
518 GST_OBJECT_UNLOCK (registry);
519 gst_object_unref (plugin);
523 * gst_registry_add_feature:
524 * @registry: the registry to add the plugin to
525 * @feature: (transfer full): the feature to add
527 * Add the feature to the registry. The feature-added signal will be emitted.
528 * This function sinks @feature.
530 * Returns: TRUE on success.
535 gst_registry_add_feature (GstRegistry * registry, GstPluginFeature * feature)
537 GstPluginFeature *existing_feature;
539 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
540 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
541 g_return_val_if_fail (feature->name != NULL, FALSE);
542 g_return_val_if_fail (feature->plugin_name != NULL, FALSE);
544 GST_OBJECT_LOCK (registry);
545 existing_feature = gst_registry_lookup_feature_locked (registry,
547 if (G_UNLIKELY (existing_feature)) {
548 GST_DEBUG_OBJECT (registry, "replacing existing feature %p (%s)",
549 existing_feature, feature->name);
550 /* Remove the existing feature from the list now, before we insert the new
551 * one, but don't unref yet because the hash is still storing a reference to
553 registry->features = g_list_remove (registry->features, existing_feature);
556 GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature, feature->name);
558 registry->features = g_list_prepend (registry->features, feature);
559 g_hash_table_replace (registry->feature_hash, feature->name, feature);
561 if (G_UNLIKELY (existing_feature)) {
562 /* We unref now. No need to remove the feature name from the hash table, it
563 * got replaced by the new feature */
564 gst_object_unref (existing_feature);
567 gst_object_ref_sink (feature);
569 registry->priv->cookie++;
570 GST_OBJECT_UNLOCK (registry);
572 GST_LOG_OBJECT (registry, "emitting feature-added for %s", feature->name);
573 g_signal_emit (registry, gst_registry_signals[FEATURE_ADDED], 0, feature);
579 * gst_registry_remove_feature:
580 * @registry: the registry to remove the feature from
581 * @feature: (transfer none): the feature to remove
583 * Remove the feature from the registry.
588 gst_registry_remove_feature (GstRegistry * registry, GstPluginFeature * feature)
590 g_return_if_fail (GST_IS_REGISTRY (registry));
591 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
593 GST_DEBUG_OBJECT (registry, "removing feature %p (%s)",
594 feature, gst_plugin_feature_get_name (feature));
596 GST_OBJECT_LOCK (registry);
597 registry->features = g_list_remove (registry->features, feature);
598 g_hash_table_remove (registry->feature_hash, feature->name);
599 registry->priv->cookie++;
600 GST_OBJECT_UNLOCK (registry);
601 gst_object_unref (feature);
605 * gst_registry_plugin_filter:
606 * @registry: registry to query
607 * @filter: (scope call): the filter to use
608 * @first: only return first match
609 * @user_data: (closure): user data passed to the filter function
611 * Runs a filter against all plugins in the registry and returns a #GList with
612 * the results. If the first flag is set, only the first match is
613 * returned (as a list with a single object).
614 * Every plugin is reffed; use gst_plugin_list_free() after use, which
617 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
618 * Use gst_plugin_list_free() after usage.
623 gst_registry_plugin_filter (GstRegistry * registry,
624 GstPluginFilter filter, gboolean first, gpointer user_data)
629 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
631 GST_OBJECT_LOCK (registry);
632 list = gst_filter_run (registry->plugins, (GstFilterFunc) filter, first,
634 for (g = list; g; g = g->next) {
635 gst_object_ref (GST_PLUGIN_CAST (g->data));
637 GST_OBJECT_UNLOCK (registry);
642 /* returns TRUE if the list was changed
644 * Must be called with the object lock taken */
646 gst_registry_get_feature_list_or_create (GstRegistry * registry,
647 GList ** previous, guint32 * cookie, GType type)
649 gboolean res = FALSE;
650 GstRegistryPrivate *priv = registry->priv;
652 if (G_UNLIKELY (!*previous || priv->cookie != *cookie)) {
653 GstTypeNameData data;
656 gst_plugin_feature_list_free (*previous);
661 gst_filter_run (registry->features,
662 (GstFilterFunc) gst_plugin_feature_type_name_filter, FALSE, &data);
663 g_list_foreach (*previous, (GFunc) gst_object_ref, NULL);
664 *cookie = priv->cookie;
672 type_find_factory_rank_cmp (const GstPluginFeature * fac1,
673 const GstPluginFeature * fac2)
675 if (G_LIKELY (fac1->rank != fac2->rank))
676 return fac2->rank - fac1->rank;
678 /* to make the order in which things happen more deterministic,
679 * sort by name when the ranks are the same. */
680 return strcmp (fac1->name, fac2->name);
684 gst_registry_get_element_factory_list (GstRegistry * registry)
688 GST_OBJECT_LOCK (registry);
690 gst_registry_get_feature_list_or_create (registry,
691 ®istry->priv->element_factory_list, ®istry->priv->efl_cookie,
692 GST_TYPE_ELEMENT_FACTORY);
694 /* Return reffed copy */
695 list = gst_plugin_feature_list_copy (registry->priv->element_factory_list);
697 GST_OBJECT_UNLOCK (registry);
703 gst_registry_get_typefind_factory_list (GstRegistry * registry)
707 GST_OBJECT_LOCK (registry);
709 if (G_UNLIKELY (gst_registry_get_feature_list_or_create (registry,
710 ®istry->priv->typefind_factory_list,
711 ®istry->priv->tfl_cookie, GST_TYPE_TYPE_FIND_FACTORY)))
712 registry->priv->typefind_factory_list =
713 g_list_sort (registry->priv->typefind_factory_list,
714 (GCompareFunc) type_find_factory_rank_cmp);
716 /* Return reffed copy */
717 list = gst_plugin_feature_list_copy (registry->priv->typefind_factory_list);
719 GST_OBJECT_UNLOCK (registry);
725 * gst_registry_feature_filter:
726 * @registry: registry to query
727 * @filter: (scope call): the filter to use
728 * @first: only return first match
729 * @user_data: (closure): user data passed to the filter function
731 * Runs a filter against all features of the plugins in the registry
732 * and returns a GList with the results.
733 * If the first flag is set, only the first match is
734 * returned (as a list with a single object).
736 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
737 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
742 gst_registry_feature_filter (GstRegistry * registry,
743 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
748 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
750 GST_OBJECT_LOCK (registry);
751 list = gst_filter_run (registry->features, (GstFilterFunc) filter, first,
753 for (g = list; g; g = g->next) {
754 gst_object_ref (GST_PLUGIN_FEATURE_CAST (g->data));
756 GST_OBJECT_UNLOCK (registry);
762 * gst_registry_find_plugin:
763 * @registry: the registry to search
764 * @name: the plugin name to find
766 * Find the plugin with the given name in the registry.
767 * The plugin will be reffed; caller is responsible for unreffing.
769 * Returns: (transfer full): the plugin with the given name or NULL if the
770 * plugin was not found. gst_object_unref() after usage.
775 gst_registry_find_plugin (GstRegistry * registry, const gchar * name)
778 GstPlugin *result = NULL;
780 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
781 g_return_val_if_fail (name != NULL, NULL);
783 walk = gst_registry_plugin_filter (registry,
784 (GstPluginFilter) gst_plugin_name_filter, TRUE, (gpointer) name);
786 result = GST_PLUGIN_CAST (walk->data);
788 gst_object_ref (result);
789 gst_plugin_list_free (walk);
796 * gst_registry_find_feature:
797 * @registry: the registry to search
798 * @name: the pluginfeature name to find
799 * @type: the pluginfeature type to find
801 * Find the pluginfeature with the given name and type in the registry.
803 * Returns: (transfer full): the pluginfeature with the given name and type
804 * or NULL if the plugin was not found. gst_object_unref() after usage.
809 gst_registry_find_feature (GstRegistry * registry, const gchar * name,
812 GstPluginFeature *feature = NULL;
814 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
815 g_return_val_if_fail (name != NULL, NULL);
816 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
818 feature = gst_registry_lookup_feature (registry, name);
819 if (feature && !g_type_is_a (G_TYPE_FROM_INSTANCE (feature), type)) {
820 gst_object_unref (feature);
828 * gst_registry_get_feature_list:
829 * @registry: a #GstRegistry
832 * Retrieves a #GList of #GstPluginFeature of @type.
834 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
835 * #GstPluginFeature of @type. Use gst_plugin_feature_list_free() after use
840 gst_registry_get_feature_list (GstRegistry * registry, GType type)
842 GstTypeNameData data;
844 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
845 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
848 if (type == GST_TYPE_ELEMENT_FACTORY)
849 return gst_registry_get_element_factory_list (registry);
850 else if (type == GST_TYPE_TYPE_FIND_FACTORY)
851 return gst_registry_get_typefind_factory_list (registry);
856 return gst_registry_feature_filter (registry,
857 (GstPluginFeatureFilter) gst_plugin_feature_type_name_filter,
862 * gst_registry_get_plugin_list:
863 * @registry: the registry to search
865 * Get a copy of all plugins registered in the given registry. The refcount
866 * of each element in the list in incremented.
868 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
869 * Use gst_plugin_list_free() after usage.
874 gst_registry_get_plugin_list (GstRegistry * registry)
879 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
881 GST_OBJECT_LOCK (registry);
882 list = g_list_copy (registry->plugins);
883 for (g = list; g; g = g->next) {
884 gst_object_ref (GST_PLUGIN_CAST (g->data));
886 GST_OBJECT_UNLOCK (registry);
891 static GstPluginFeature *
892 gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name)
894 return g_hash_table_lookup (registry->feature_hash, name);
898 * gst_registry_lookup_feature:
899 * @registry: a #GstRegistry
900 * @name: a #GstPluginFeature name
902 * Find a #GstPluginFeature with @name in @registry.
904 * Returns: (transfer full): a #GstPluginFeature with its refcount incremented,
905 * use gst_object_unref() after usage.
910 gst_registry_lookup_feature (GstRegistry * registry, const char *name)
912 GstPluginFeature *feature;
914 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
915 g_return_val_if_fail (name != NULL, NULL);
917 GST_OBJECT_LOCK (registry);
918 feature = gst_registry_lookup_feature_locked (registry, name);
920 gst_object_ref (feature);
921 GST_OBJECT_UNLOCK (registry);
927 gst_registry_lookup_bn_locked (GstRegistry * registry, const char *basename)
929 return g_hash_table_lookup (registry->basename_hash, basename);
933 gst_registry_lookup_bn (GstRegistry * registry, const char *basename)
937 GST_OBJECT_LOCK (registry);
938 plugin = gst_registry_lookup_bn_locked (registry, basename);
940 gst_object_ref (plugin);
941 GST_OBJECT_UNLOCK (registry);
947 * gst_registry_lookup:
948 * @registry: the registry to look up in
949 * @filename: the name of the file to look up
951 * Look up a plugin in the given registry with the given filename.
952 * If found, plugin is reffed.
954 * Returns: (transfer full): the #GstPlugin if found, or NULL if not.
955 * gst_object_unref() after usage.
958 gst_registry_lookup (GstRegistry * registry, const char *filename)
963 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
964 g_return_val_if_fail (filename != NULL, NULL);
966 basename = g_path_get_basename (filename);
967 if (G_UNLIKELY (basename == NULL))
970 plugin = gst_registry_lookup_bn (registry, basename);
979 REGISTRY_SCAN_HELPER_NOT_STARTED = 0,
980 REGISTRY_SCAN_HELPER_DISABLED,
981 REGISTRY_SCAN_HELPER_RUNNING
982 } GstRegistryScanHelperState;
986 GstRegistry *registry;
987 GstRegistryScanHelperState helper_state;
988 GstPluginLoader *helper;
990 } GstRegistryScanContext;
993 init_scan_context (GstRegistryScanContext * context, GstRegistry * registry)
997 context->registry = registry;
999 /* see if forking is enabled and set up the scan helper state accordingly */
1000 do_fork = _gst_enable_registry_fork;
1002 const gchar *fork_env;
1004 /* forking enabled, see if it is disabled with an env var */
1005 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
1006 /* fork enabled for any value different from "no" */
1007 do_fork = strcmp (fork_env, "no") != 0;
1012 context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
1014 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1016 context->helper = NULL;
1017 context->changed = FALSE;
1021 clear_scan_context (GstRegistryScanContext * context)
1023 if (context->helper) {
1024 context->changed |= _priv_gst_plugin_loader_funcs.destroy (context->helper);
1025 context->helper = NULL;
1030 gst_registry_scan_plugin_file (GstRegistryScanContext * context,
1031 const gchar * filename, off_t file_size, time_t file_mtime)
1033 gboolean changed = FALSE;
1034 GstPlugin *newplugin = NULL;
1037 /* Disable external plugin loader on Windows until it is ported properly. */
1038 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1042 /* Have a plugin to load - see if the scan-helper needs starting */
1043 if (context->helper_state == REGISTRY_SCAN_HELPER_NOT_STARTED) {
1044 GST_DEBUG ("Starting plugin scanner for file %s", filename);
1045 context->helper = _priv_gst_plugin_loader_funcs.create (context->registry);
1046 if (context->helper != NULL)
1047 context->helper_state = REGISTRY_SCAN_HELPER_RUNNING;
1049 GST_WARNING ("Failed starting plugin scanner. Scanning in-process");
1050 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1054 if (context->helper_state == REGISTRY_SCAN_HELPER_RUNNING) {
1055 GST_DEBUG ("Using scan-helper to load plugin %s", filename);
1056 if (!_priv_gst_plugin_loader_funcs.load (context->helper,
1057 filename, file_size, file_mtime)) {
1058 g_warning ("External plugin loader failed. This most likely means that "
1059 "the plugin loader helper binary was not found or could not be run. "
1060 "%s", (g_getenv ("GST_PLUGIN_PATH") != NULL) ?
1061 "If you are running an uninstalled GStreamer setup, you might need "
1062 "to update your gst-uninstalled script so that the "
1063 "GST_PLUGIN_SCANNER environment variable gets set." : "");
1064 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1068 /* Check if the helper is disabled (or just got disabled above) */
1069 if (context->helper_state == REGISTRY_SCAN_HELPER_DISABLED) {
1070 /* Load plugin the old fashioned way... */
1072 /* We don't use a GError here because a failure to load some shared
1073 * objects as plugins is normal (particularly in the uninstalled case)
1075 newplugin = gst_plugin_load_file (filename, NULL);
1079 GST_DEBUG_OBJECT (context->registry, "marking new plugin %p as registered",
1081 newplugin->registered = TRUE;
1082 gst_object_unref (newplugin);
1090 is_blacklisted_hidden_directory (const gchar * dirent)
1092 if (G_LIKELY (dirent[0] != '.'))
1095 /* skip the .debug directory, these contain elf files that are not
1096 * useful or worse, can crash dlopen () */
1097 if (strcmp (dirent, ".debug") == 0)
1100 /* can also skip .git and .deps dirs, those won't contain useful files.
1101 * This speeds up scanning a bit in uninstalled setups. */
1102 if (strcmp (dirent, ".git") == 0 || strcmp (dirent, ".deps") == 0)
1109 gst_registry_scan_path_level (GstRegistryScanContext * context,
1110 const gchar * path, int level)
1113 const gchar *dirent;
1116 gboolean changed = FALSE;
1118 dir = g_dir_open (path, 0, NULL);
1122 while ((dirent = g_dir_read_name (dir))) {
1123 GStatBuf file_status;
1125 filename = g_build_filename (path, dirent, NULL);
1126 if (g_stat (filename, &file_status) < 0) {
1127 /* Plugin will be removed from cache after the scan completes if it
1128 * is still marked 'cached' */
1133 if (file_status.st_mode & S_IFDIR) {
1134 if (G_UNLIKELY (is_blacklisted_hidden_directory (dirent))) {
1135 GST_TRACE_OBJECT (context->registry, "ignoring %s directory", dirent);
1139 /* FIXME 0.11: Don't recurse into directories, this behaviour
1140 * is inconsistent with other PATH environment variables
1143 GST_LOG_OBJECT (context->registry, "recursing into directory %s",
1145 changed |= gst_registry_scan_path_level (context, filename, level - 1);
1147 GST_LOG_OBJECT (context->registry, "not recursing into directory %s, "
1148 "recursion level too deep", filename);
1153 if (!(file_status.st_mode & S_IFREG)) {
1154 GST_TRACE_OBJECT (context->registry, "%s is not a regular file, ignoring",
1159 if (!g_str_has_suffix (dirent, G_MODULE_SUFFIX)
1160 #ifdef GST_EXTRA_MODULE_SUFFIX
1161 && !g_str_has_suffix (dirent, GST_EXTRA_MODULE_SUFFIX)
1164 GST_TRACE_OBJECT (context->registry,
1165 "extension is not recognized as module file, ignoring file %s",
1171 GST_LOG_OBJECT (context->registry, "file %s looks like a possible module",
1174 /* try to avoid unnecessary plugin-move pain */
1175 if (g_str_has_prefix (dirent, "libgstvalve") ||
1176 g_str_has_prefix (dirent, "libgstselector")) {
1177 GST_WARNING_OBJECT (context->registry, "ignoring old plugin %s which "
1178 "has been merged into the corelements plugin", filename);
1179 /* Plugin will be removed from cache after the scan completes if it
1180 * is still marked 'cached' */
1185 /* plug-ins are considered unique by basename; if the given name
1186 * was already seen by the registry, we ignore it */
1187 plugin = gst_registry_lookup_bn (context->registry, dirent);
1189 gboolean env_vars_changed, deps_changed = FALSE;
1191 if (plugin->registered) {
1192 GST_DEBUG_OBJECT (context->registry,
1193 "plugin already registered from path \"%s\"",
1194 GST_STR_NULL (plugin->filename));
1196 gst_object_unref (plugin);
1200 env_vars_changed = _priv_plugin_deps_env_vars_changed (plugin);
1202 /* If a file with a certain basename is seen on a different path,
1203 * update the plugin to ensure the registry cache will reflect up
1204 * to date information */
1206 if (plugin->file_mtime == file_status.st_mtime &&
1207 plugin->file_size == file_status.st_size && !env_vars_changed &&
1208 !(deps_changed = _priv_plugin_deps_files_changed (plugin)) &&
1209 !strcmp (plugin->filename, filename)) {
1210 GST_LOG_OBJECT (context->registry, "file %s cached", filename);
1211 plugin->flags &= ~GST_PLUGIN_FLAG_CACHED;
1212 GST_LOG_OBJECT (context->registry,
1213 "marking plugin %p as registered as %s", plugin, filename);
1214 plugin->registered = TRUE;
1216 GST_INFO_OBJECT (context->registry, "cached info for %s is stale",
1218 GST_DEBUG_OBJECT (context->registry, "mtime %ld != %ld or size %"
1219 G_GINT64_FORMAT " != %" G_GINT64_FORMAT " or external dependency "
1220 "env_vars changed: %d or external dependencies changed: %d"
1221 " or old path %s != new path %s",
1222 plugin->file_mtime, file_status.st_mtime,
1223 (gint64) plugin->file_size, (gint64) file_status.st_size,
1224 env_vars_changed, deps_changed, plugin->filename, filename);
1225 gst_registry_remove_plugin (context->registry, plugin);
1226 changed |= gst_registry_scan_plugin_file (context, filename,
1227 file_status.st_size, file_status.st_mtime);
1229 gst_object_unref (plugin);
1232 GST_DEBUG_OBJECT (context->registry, "file %s not yet in registry",
1234 changed |= gst_registry_scan_plugin_file (context, filename,
1235 file_status.st_size, file_status.st_mtime);
1247 gst_registry_scan_path_internal (GstRegistryScanContext * context,
1252 GST_DEBUG_OBJECT (context->registry, "scanning path %s", path);
1253 changed = gst_registry_scan_path_level (context, path, 10);
1255 GST_DEBUG_OBJECT (context->registry, "registry changed in path %s: %d", path,
1261 * gst_registry_scan_path:
1262 * @registry: the registry to add found plugins to
1263 * @path: the path to scan
1265 * Scan the given path for plugins to add to the registry. The syntax of the
1266 * path is specific to the registry.
1268 * Returns: %TRUE if registry changed
1271 gst_registry_scan_path (GstRegistry * registry, const gchar * path)
1273 GstRegistryScanContext context;
1276 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1277 g_return_val_if_fail (path != NULL, FALSE);
1279 init_scan_context (&context, registry);
1281 result = gst_registry_scan_path_internal (&context, path);
1283 clear_scan_context (&context);
1284 result |= context.changed;
1290 _gst_plugin_feature_filter_plugin_name (GstPluginFeature * feature,
1293 return (strcmp (feature->plugin_name, (gchar *) user_data) == 0);
1297 * gst_registry_get_feature_list_by_plugin:
1298 * @registry: a #GstRegistry.
1299 * @name: a plugin name.
1301 * Retrieves a #GList of features of the plugin with name @name.
1303 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
1304 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
1307 gst_registry_get_feature_list_by_plugin (GstRegistry * registry,
1310 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1311 g_return_val_if_fail (name != NULL, NULL);
1313 return gst_registry_feature_filter (registry,
1314 _gst_plugin_feature_filter_plugin_name, FALSE, (gpointer) name);
1317 /* Unref and delete the default registry */
1319 _priv_gst_registry_cleanup (void)
1321 GstRegistry *registry;
1323 g_static_mutex_lock (&_gst_registry_mutex);
1324 if ((registry = _gst_registry_default) != NULL) {
1325 _gst_registry_default = NULL;
1327 g_static_mutex_unlock (&_gst_registry_mutex);
1329 /* unref outside of the lock because we can. */
1331 gst_object_unref (registry);
1335 * gst_default_registry_check_feature_version:
1336 * @feature_name: the name of the feature (e.g. "oggdemux")
1337 * @min_major: the minimum major version number
1338 * @min_minor: the minimum minor version number
1339 * @min_micro: the minimum micro version number
1341 * Checks whether a plugin feature by the given name exists in the
1342 * default registry and whether its version is at least the
1345 * Returns: #TRUE if the feature could be found and the version is
1346 * the same as the required version or newer, and #FALSE otherwise.
1349 gst_default_registry_check_feature_version (const gchar * feature_name,
1350 guint min_major, guint min_minor, guint min_micro)
1352 GstPluginFeature *feature;
1353 GstRegistry *registry;
1354 gboolean ret = FALSE;
1356 g_return_val_if_fail (feature_name != NULL, FALSE);
1358 GST_DEBUG ("Looking up plugin feature '%s'", feature_name);
1360 registry = gst_registry_get_default ();
1361 feature = gst_registry_lookup_feature (registry, feature_name);
1363 ret = gst_plugin_feature_check_version (feature, min_major, min_minor,
1365 gst_object_unref (feature);
1367 GST_DEBUG ("Could not find plugin feature '%s'", feature_name);
1374 load_plugin_func (gpointer data, gpointer user_data)
1377 const gchar *filename;
1380 filename = (const gchar *) data;
1381 GST_DEBUG ("Pre-loading plugin %s", filename);
1383 plugin = gst_plugin_load_file (filename, &err);
1386 GST_INFO ("Loaded plugin: \"%s\"", filename);
1388 gst_default_registry_add_plugin (plugin);
1391 /* Report error to user, and free error */
1392 GST_ERROR ("Failed to load plugin: %s", err->message);
1395 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
1400 #ifndef GST_DISABLE_REGISTRY
1401 /* Unref all plugins marked 'cached', to clear old plugins that no
1402 * longer exist. Returns TRUE if any plugins were removed */
1404 gst_registry_remove_cache_plugins (GstRegistry * registry)
1409 gboolean changed = FALSE;
1411 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1413 GST_OBJECT_LOCK (registry);
1415 GST_DEBUG_OBJECT (registry, "removing cached plugins");
1416 g = registry->plugins;
1420 if (plugin->flags & GST_PLUGIN_FLAG_CACHED) {
1421 GST_DEBUG_OBJECT (registry, "removing cached plugin \"%s\"",
1422 GST_STR_NULL (plugin->filename));
1423 registry->plugins = g_list_delete_link (registry->plugins, g);
1424 if (G_LIKELY (plugin->basename))
1425 g_hash_table_remove (registry->basename_hash, plugin->basename);
1426 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
1427 gst_object_unref (plugin);
1433 GST_OBJECT_UNLOCK (registry);
1440 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
1441 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
1442 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
1443 } GstRegistryScanAndUpdateResult;
1446 * scan_and_update_registry:
1447 * @default_registry: the #GstRegistry
1448 * @registry_file: registry filename
1449 * @write_changes: write registry if it has changed?
1451 * Scans for registry changes and eventually updates the registry cache.
1453 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
1454 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
1455 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
1456 * it has been updated and the cache needs to be re-read.
1458 static GstRegistryScanAndUpdateResult
1459 scan_and_update_registry (GstRegistry * default_registry,
1460 const gchar * registry_file, gboolean write_changes, GError ** error)
1462 const gchar *plugin_path;
1463 gboolean changed = FALSE;
1465 GstRegistryScanContext context;
1467 GST_INFO ("Validating plugins from registry cache: %s", registry_file);
1469 init_scan_context (&context, default_registry);
1471 /* It sounds tempting to just compare the mtime of directories with the mtime
1472 * of the registry cache, but it does not work. It would not catch updated
1473 * plugins, which might bring more or less features.
1476 /* scan paths specified via --gst-plugin-path */
1477 GST_DEBUG ("scanning paths added via --gst-plugin-path");
1478 for (l = _priv_gst_plugin_paths; l != NULL; l = l->next) {
1479 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
1480 changed |= gst_registry_scan_path_internal (&context, (gchar *) l->data);
1482 /* keep plugin_paths around in case a re-scan is forced later on */
1484 /* GST_PLUGIN_PATH specifies a list of directories to scan for
1485 * additional plugins. These take precedence over the system plugins */
1486 plugin_path = g_getenv ("GST_PLUGIN_PATH");
1491 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
1492 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1493 for (i = 0; list[i]; i++) {
1494 changed |= gst_registry_scan_path_internal (&context, list[i]);
1498 GST_DEBUG ("GST_PLUGIN_PATH not set");
1501 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
1502 * loaded by default. If not set, this defaults to the system-installed
1503 * path, and the plugins installed in the user's home directory */
1504 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
1505 if (plugin_path == NULL) {
1508 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
1510 /* plugins in the user's home directory take precedence over
1511 * system-installed ones */
1512 home_plugins = g_build_filename (g_get_user_data_dir (),
1513 "gstreamer-" GST_MAJORMINOR, "plugins", NULL);
1515 GST_DEBUG ("scanning home plugins %s", home_plugins);
1516 changed |= gst_registry_scan_path_internal (&context, home_plugins);
1517 g_free (home_plugins);
1519 /* add the main (installed) library path */
1520 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
1521 changed |= gst_registry_scan_path_internal (&context, PLUGINDIR);
1529 g_win32_get_package_installation_directory_of_module
1530 (_priv_gst_dll_handle);
1532 dir = g_build_filename (base_dir, "lib", "gstreamer-0.10", NULL);
1533 GST_DEBUG ("scanning DLL dir %s", dir);
1535 changed |= gst_registry_scan_path_internal (&context, dir);
1545 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
1546 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1547 for (i = 0; list[i]; i++) {
1548 changed |= gst_registry_scan_path_internal (&context, list[i]);
1553 clear_scan_context (&context);
1554 changed |= context.changed;
1556 /* Remove cached plugins so stale info is cleared. */
1557 changed |= gst_registry_remove_cache_plugins (default_registry);
1560 GST_INFO ("Registry cache has not changed");
1561 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
1564 if (!write_changes) {
1565 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
1566 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1569 GST_INFO ("Registry cache changed. Writing new registry cache");
1570 if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
1571 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
1572 _("Error writing registry cache to %s: %s"),
1573 registry_file, g_strerror (errno));
1574 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1577 GST_INFO ("Registry cache written successfully");
1578 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
1582 ensure_current_registry (GError ** error)
1584 gchar *registry_file;
1585 GstRegistry *default_registry;
1586 gboolean ret = TRUE;
1587 gboolean do_update = TRUE;
1588 gboolean have_cache = TRUE;
1590 default_registry = gst_registry_get_default ();
1591 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
1592 if (registry_file == NULL) {
1593 registry_file = g_build_filename (g_get_user_cache_dir (),
1594 "gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
1597 if (!_gst_disable_registry_cache) {
1598 GST_INFO ("reading registry cache: %s", registry_file);
1599 have_cache = gst_registry_binary_read_cache (default_registry,
1601 /* Only ever read the registry cache once, then disable it for
1602 * subsequent updates during the program lifetime */
1603 _gst_disable_registry_cache = TRUE;
1607 do_update = !_priv_gst_disable_registry_update;
1609 const gchar *update_env;
1611 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
1612 /* do update for any value different from "no" */
1613 do_update = (strcmp (update_env, "no") != 0);
1619 /* now check registry */
1620 GST_DEBUG ("Updating registry cache");
1621 scan_and_update_registry (default_registry, registry_file, TRUE, error);
1623 GST_DEBUG ("Not updating registry cache (disabled)");
1626 g_free (registry_file);
1627 GST_INFO ("registry reading and updating done, result = %d", ret);
1631 #endif /* GST_DISABLE_REGISTRY */
1634 * gst_registry_fork_is_enabled:
1636 * By default GStreamer will perform scanning and rebuilding of the
1637 * registry file using a helper child process.
1639 * Applications might want to disable this behaviour with the
1640 * gst_registry_fork_set_enabled() function, in which case new plugins
1641 * are scanned (and loaded) into the application process.
1643 * Returns: %TRUE if GStreamer will use the child helper process when
1644 * rebuilding the registry.
1649 gst_registry_fork_is_enabled (void)
1651 return _gst_enable_registry_fork;
1655 * gst_registry_fork_set_enabled:
1656 * @enabled: whether rebuilding the registry can use a temporary child helper process.
1658 * Applications might want to disable/enable spawning of a child helper process
1659 * when rebuilding the registry. See gst_registry_fork_is_enabled() for more
1665 gst_registry_fork_set_enabled (gboolean enabled)
1667 _gst_enable_registry_fork = enabled;
1671 * gst_update_registry:
1673 * Forces GStreamer to re-scan its plugin paths and update the default
1676 * Applications will almost never need to call this function, it is only
1677 * useful if the application knows new plugins have been installed (or old
1678 * ones removed) since the start of the application (or, to be precise, the
1679 * first call to gst_init()) and the application wants to make use of any
1680 * newly-installed plugins without restarting the application.
1682 * Applications should assume that the registry update is neither atomic nor
1683 * thread-safe and should therefore not have any dynamic pipelines running
1684 * (including the playbin and decodebin elements) and should also not create
1685 * any elements or access the GStreamer registry while the update is in
1688 * Note that this function may block for a significant amount of time.
1690 * Returns: %TRUE if the registry has been updated successfully (does not
1691 * imply that there were changes), otherwise %FALSE.
1696 gst_update_registry (void)
1700 #ifndef GST_DISABLE_REGISTRY
1703 res = ensure_current_registry (&err);
1705 GST_WARNING ("registry update failed: %s", err->message);
1708 GST_LOG ("registry update succeeded");
1712 GST_WARNING ("registry update failed: %s", "registry disabled");
1714 #endif /* GST_DISABLE_REGISTRY */
1716 if (_priv_gst_preload_plugins) {
1717 GST_DEBUG ("Preloading indicated plugins...");
1718 g_slist_foreach (_priv_gst_preload_plugins, load_plugin_func, NULL);
1725 * gst_registry_get_feature_list_cookie:
1726 * @registry: the registry
1728 * Returns the registrys feature list cookie. This changes
1729 * every time a feature is added or removed from the registry.
1731 * Returns: the feature list cookie.
1736 gst_registry_get_feature_list_cookie (GstRegistry * registry)
1738 g_return_val_if_fail (GST_IS_REGISTRY (registry), 0);
1740 return registry->priv->cookie;