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 initialization.
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;
179 static gboolean __registry_reuse_plugin_scanner = TRUE;
182 /* Element signals and args */
190 static void gst_registry_finalize (GObject * object);
192 static guint gst_registry_signals[LAST_SIGNAL] = { 0 };
194 static GstPluginFeature *gst_registry_lookup_feature_locked (GstRegistry *
195 registry, const char *name);
196 static GstPlugin *gst_registry_lookup_bn_locked (GstRegistry * registry,
197 const char *basename);
199 G_DEFINE_TYPE (GstRegistry, gst_registry, GST_TYPE_OBJECT);
200 static GstObjectClass *parent_class = NULL;
203 gst_registry_class_init (GstRegistryClass * klass)
205 GObjectClass *gobject_class;
207 gobject_class = (GObjectClass *) klass;
209 parent_class = g_type_class_peek_parent (klass);
210 g_type_class_add_private (klass, sizeof (GstRegistryPrivate));
213 * GstRegistry::plugin-added:
214 * @registry: the registry that emitted the signal
215 * @plugin: the plugin that has been added
217 * Signals that a plugin has been added to the registry (possibly
218 * replacing a previously-added one by the same name)
220 gst_registry_signals[PLUGIN_ADDED] =
221 g_signal_new ("plugin-added", G_TYPE_FROM_CLASS (klass),
222 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, plugin_added), NULL,
223 NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER);
226 * GstRegistry::feature-added:
227 * @registry: the registry that emitted the signal
228 * @feature: the feature that has been added
230 * Signals that a feature has been added to the registry (possibly
231 * replacing a previously-added one by the same name)
233 gst_registry_signals[FEATURE_ADDED] =
234 g_signal_new ("feature-added", G_TYPE_FROM_CLASS (klass),
235 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, feature_added),
236 NULL, NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER);
238 gobject_class->finalize = gst_registry_finalize;
242 gst_registry_init (GstRegistry * registry)
244 registry->feature_hash = g_hash_table_new (g_str_hash, g_str_equal);
245 registry->basename_hash = g_hash_table_new (g_str_hash, g_str_equal);
247 G_TYPE_INSTANCE_GET_PRIVATE (registry, GST_TYPE_REGISTRY,
252 gst_registry_finalize (GObject * object)
254 GstRegistry *registry = GST_REGISTRY (object);
258 plugins = registry->plugins;
259 registry->plugins = NULL;
261 GST_DEBUG_OBJECT (registry, "registry finalize");
264 GstPlugin *plugin = p->data;
267 GST_LOG_OBJECT (registry, "removing plugin %s",
268 gst_plugin_get_name (plugin));
269 gst_object_unref (plugin);
273 g_list_free (plugins);
275 features = registry->features;
276 registry->features = NULL;
280 GstPluginFeature *feature = f->data;
283 GST_LOG_OBJECT (registry, "removing feature %p (%s)",
284 feature, gst_plugin_feature_get_name (feature));
285 gst_object_unparent (GST_OBJECT_CAST (feature));
289 g_list_free (features);
291 g_hash_table_destroy (registry->feature_hash);
292 registry->feature_hash = NULL;
293 g_hash_table_destroy (registry->basename_hash);
294 registry->basename_hash = NULL;
296 if (registry->priv->element_factory_list) {
297 GST_DEBUG_OBJECT (registry, "Cleaning up cached element factory list");
298 gst_plugin_feature_list_free (registry->priv->element_factory_list);
301 if (registry->priv->typefind_factory_list) {
302 GST_DEBUG_OBJECT (registry, "Cleaning up cached typefind factory list");
303 gst_plugin_feature_list_free (registry->priv->typefind_factory_list);
306 G_OBJECT_CLASS (parent_class)->finalize (object);
310 * gst_registry_get_default:
312 * Retrieves the default registry. The caller does not own a reference on the
313 * registry, as it is alive as long as GStreamer is initialized.
315 * Returns: (transfer none): The default #GstRegistry.
318 gst_registry_get_default (void)
320 GstRegistry *registry;
322 g_static_mutex_lock (&_gst_registry_mutex);
323 if (G_UNLIKELY (!_gst_registry_default)) {
324 _gst_registry_default = g_object_newv (GST_TYPE_REGISTRY, 0, NULL);
325 gst_object_ref_sink (GST_OBJECT_CAST (_gst_registry_default));
327 registry = _gst_registry_default;
328 g_static_mutex_unlock (&_gst_registry_mutex);
334 * gst_registry_add_path:
335 * @registry: the registry to add the path to
336 * @path: the path to add to the registry
338 * Add the given path to the registry. The syntax of the
339 * path is specific to the registry. If the path has already been
343 gst_registry_add_path (GstRegistry * registry, const gchar * path)
345 g_return_if_fail (GST_IS_REGISTRY (registry));
346 g_return_if_fail (path != NULL);
348 if (strlen (path) == 0)
351 GST_OBJECT_LOCK (registry);
352 if (g_list_find_custom (registry->paths, path, (GCompareFunc) strcmp))
355 GST_INFO ("Adding plugin path: \"%s\"", path);
356 registry->paths = g_list_append (registry->paths, g_strdup (path));
357 GST_OBJECT_UNLOCK (registry);
363 GST_INFO ("Ignoring empty plugin path");
368 g_warning ("path %s already added to registry", path);
369 GST_OBJECT_UNLOCK (registry);
375 * gst_registry_get_path_list:
376 * @registry: the registry to get the pathlist of
378 * Get the list of paths for the given registry.
380 * Returns: (transfer container) (element-type char*): A #GList of paths as
381 * strings. g_list_free after use.
386 gst_registry_get_path_list (GstRegistry * registry)
390 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
392 GST_OBJECT_LOCK (registry);
393 /* We don't need to copy the strings, because they won't be deleted
394 * as long as the GstRegistry is around */
395 list = g_list_copy (registry->paths);
396 GST_OBJECT_UNLOCK (registry);
403 * gst_registry_add_plugin:
404 * @registry: the registry to add the plugin to
405 * @plugin: (transfer full): the plugin to add
407 * Add the plugin to the registry. The plugin-added signal will be emitted.
408 * This function will sink @plugin.
410 * Returns: TRUE on success.
415 gst_registry_add_plugin (GstRegistry * registry, GstPlugin * plugin)
417 GstPlugin *existing_plugin;
419 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
420 g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
422 GST_OBJECT_LOCK (registry);
423 if (G_LIKELY (plugin->basename)) {
424 /* we have a basename, see if we find the plugin */
426 gst_registry_lookup_bn_locked (registry, plugin->basename);
427 if (existing_plugin) {
428 GST_DEBUG_OBJECT (registry,
429 "Replacing existing plugin \"%s\" %p with new plugin %p for filename \"%s\"",
430 GST_STR_NULL (existing_plugin->filename), existing_plugin, plugin,
431 GST_STR_NULL (plugin->filename));
432 /* If the new plugin is blacklisted and the existing one isn't cached, do not
433 * accept if it's from a different location than the existing one */
434 if ((plugin->flags & GST_PLUGIN_FLAG_BLACKLISTED) &&
435 strcmp (plugin->filename, existing_plugin->filename)) {
436 GST_WARNING_OBJECT (registry,
437 "Not replacing plugin because new one (%s) is blacklisted but for a different location than existing one (%s)",
438 plugin->filename, existing_plugin->filename);
439 gst_object_unref (plugin);
440 GST_OBJECT_UNLOCK (registry);
443 registry->plugins = g_list_remove (registry->plugins, existing_plugin);
444 if (G_LIKELY (existing_plugin->basename))
445 g_hash_table_remove (registry->basename_hash,
446 existing_plugin->basename);
447 gst_object_unref (existing_plugin);
451 GST_DEBUG_OBJECT (registry, "adding plugin %p for filename \"%s\"",
452 plugin, GST_STR_NULL (plugin->filename));
454 registry->plugins = g_list_prepend (registry->plugins, plugin);
455 if (G_LIKELY (plugin->basename))
456 g_hash_table_replace (registry->basename_hash, plugin->basename, plugin);
458 gst_object_ref_sink (plugin);
459 GST_OBJECT_UNLOCK (registry);
461 GST_LOG_OBJECT (registry, "emitting plugin-added for filename \"%s\"",
462 GST_STR_NULL (plugin->filename));
463 g_signal_emit (registry, gst_registry_signals[PLUGIN_ADDED], 0, plugin);
469 gst_registry_remove_features_for_plugin_unlocked (GstRegistry * registry,
474 g_return_if_fail (GST_IS_REGISTRY (registry));
475 g_return_if_fail (GST_IS_PLUGIN (plugin));
477 /* Remove all features for this plugin */
478 f = registry->features;
480 GList *next = g_list_next (f);
481 GstPluginFeature *feature = f->data;
483 if (G_UNLIKELY (feature && feature->plugin == plugin)) {
484 GST_DEBUG_OBJECT (registry, "removing feature %p (%s) for plugin %p (%s)",
485 feature, gst_plugin_feature_get_name (feature), plugin,
488 registry->features = g_list_delete_link (registry->features, f);
489 g_hash_table_remove (registry->feature_hash, feature->name);
490 gst_object_unparent (GST_OBJECT_CAST (feature));
494 registry->priv->cookie++;
498 * gst_registry_remove_plugin:
499 * @registry: the registry to remove the plugin from
500 * @plugin: (transfer none): the plugin to remove
502 * Remove the plugin from the registry.
507 gst_registry_remove_plugin (GstRegistry * registry, GstPlugin * plugin)
509 g_return_if_fail (GST_IS_REGISTRY (registry));
510 g_return_if_fail (GST_IS_PLUGIN (plugin));
512 GST_DEBUG_OBJECT (registry, "removing plugin %p (%s)",
513 plugin, gst_plugin_get_name (plugin));
515 GST_OBJECT_LOCK (registry);
516 registry->plugins = g_list_remove (registry->plugins, plugin);
517 if (G_LIKELY (plugin->basename))
518 g_hash_table_remove (registry->basename_hash, plugin->basename);
519 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
520 GST_OBJECT_UNLOCK (registry);
521 gst_object_unref (plugin);
525 * gst_registry_add_feature:
526 * @registry: the registry to add the plugin to
527 * @feature: (transfer full): the feature to add
529 * Add the feature to the registry. The feature-added signal will be emitted.
530 * This function sinks @feature.
532 * Returns: TRUE on success.
537 gst_registry_add_feature (GstRegistry * registry, GstPluginFeature * feature)
539 GstPluginFeature *existing_feature;
541 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
542 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
543 g_return_val_if_fail (feature->name != NULL, FALSE);
544 g_return_val_if_fail (feature->plugin_name != NULL, FALSE);
546 GST_OBJECT_LOCK (registry);
547 existing_feature = gst_registry_lookup_feature_locked (registry,
549 if (G_UNLIKELY (existing_feature)) {
550 GST_DEBUG_OBJECT (registry, "replacing existing feature %p (%s)",
551 existing_feature, feature->name);
552 /* Remove the existing feature from the list now, before we insert the new
553 * one, but don't unref yet because the hash is still storing a reference to
555 registry->features = g_list_remove (registry->features, existing_feature);
558 GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature, feature->name);
560 registry->features = g_list_prepend (registry->features, feature);
561 g_hash_table_replace (registry->feature_hash, feature->name, feature);
563 if (G_UNLIKELY (existing_feature)) {
564 /* We unref now. No need to remove the feature name from the hash table, it
565 * got replaced by the new feature */
566 gst_object_unparent (GST_OBJECT_CAST (existing_feature));
569 gst_object_set_parent (GST_OBJECT_CAST (feature), GST_OBJECT_CAST (registry));
571 registry->priv->cookie++;
572 GST_OBJECT_UNLOCK (registry);
574 GST_LOG_OBJECT (registry, "emitting feature-added for %s", feature->name);
575 g_signal_emit (registry, gst_registry_signals[FEATURE_ADDED], 0, feature);
581 * gst_registry_remove_feature:
582 * @registry: the registry to remove the feature from
583 * @feature: (transfer none): the feature to remove
585 * Remove the feature from the registry.
590 gst_registry_remove_feature (GstRegistry * registry, GstPluginFeature * feature)
592 g_return_if_fail (GST_IS_REGISTRY (registry));
593 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
595 GST_DEBUG_OBJECT (registry, "removing feature %p (%s)",
596 feature, gst_plugin_feature_get_name (feature));
598 GST_OBJECT_LOCK (registry);
599 registry->features = g_list_remove (registry->features, feature);
600 g_hash_table_remove (registry->feature_hash, feature->name);
601 registry->priv->cookie++;
602 GST_OBJECT_UNLOCK (registry);
604 gst_object_unparent ((GstObject *) feature);
608 * gst_registry_plugin_filter:
609 * @registry: registry to query
610 * @filter: (scope call): the filter to use
611 * @first: only return first match
612 * @user_data: (closure): user data passed to the filter function
614 * Runs a filter against all plugins in the registry and returns a #GList with
615 * the results. If the first flag is set, only the first match is
616 * returned (as a list with a single object).
617 * Every plugin is reffed; use gst_plugin_list_free() after use, which
620 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
621 * Use gst_plugin_list_free() after usage.
626 gst_registry_plugin_filter (GstRegistry * registry,
627 GstPluginFilter filter, gboolean first, gpointer user_data)
632 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
634 GST_OBJECT_LOCK (registry);
635 list = gst_filter_run (registry->plugins, (GstFilterFunc) filter, first,
637 for (g = list; g; g = g->next) {
638 gst_object_ref (GST_PLUGIN_CAST (g->data));
640 GST_OBJECT_UNLOCK (registry);
645 #ifdef GST_DISABLE_DEPRECATED
652 gst_plugin_feature_type_name_filter (GstPluginFeature * feature,
653 GstTypeNameData * data)
655 g_assert (GST_IS_PLUGIN_FEATURE (feature));
657 return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
659 || !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));
663 /* returns TRUE if the list was changed
665 * Must be called with the object lock taken */
667 gst_registry_get_feature_list_or_create (GstRegistry * registry,
668 GList ** previous, guint32 * cookie, GType type)
670 gboolean res = FALSE;
671 GstRegistryPrivate *priv = registry->priv;
673 if (G_UNLIKELY (!*previous || priv->cookie != *cookie)) {
674 GstTypeNameData data;
677 gst_plugin_feature_list_free (*previous);
682 gst_filter_run (registry->features,
683 (GstFilterFunc) gst_plugin_feature_type_name_filter, FALSE, &data);
684 g_list_foreach (*previous, (GFunc) gst_object_ref, NULL);
685 *cookie = priv->cookie;
693 type_find_factory_rank_cmp (const GstPluginFeature * fac1,
694 const GstPluginFeature * fac2)
696 if (G_LIKELY (fac1->rank != fac2->rank))
697 return fac2->rank - fac1->rank;
699 /* to make the order in which things happen more deterministic,
700 * sort by name when the ranks are the same. */
701 return strcmp (fac1->name, fac2->name);
705 gst_registry_get_element_factory_list (GstRegistry * registry)
709 GST_OBJECT_LOCK (registry);
711 gst_registry_get_feature_list_or_create (registry,
712 ®istry->priv->element_factory_list, ®istry->priv->efl_cookie,
713 GST_TYPE_ELEMENT_FACTORY);
715 /* Return reffed copy */
716 list = gst_plugin_feature_list_copy (registry->priv->element_factory_list);
718 GST_OBJECT_UNLOCK (registry);
724 gst_registry_get_typefind_factory_list (GstRegistry * registry)
728 GST_OBJECT_LOCK (registry);
730 if (G_UNLIKELY (gst_registry_get_feature_list_or_create (registry,
731 ®istry->priv->typefind_factory_list,
732 ®istry->priv->tfl_cookie, GST_TYPE_TYPE_FIND_FACTORY)))
733 registry->priv->typefind_factory_list =
734 g_list_sort (registry->priv->typefind_factory_list,
735 (GCompareFunc) type_find_factory_rank_cmp);
737 /* Return reffed copy */
738 list = gst_plugin_feature_list_copy (registry->priv->typefind_factory_list);
740 GST_OBJECT_UNLOCK (registry);
746 * gst_registry_feature_filter:
747 * @registry: registry to query
748 * @filter: (scope call): the filter to use
749 * @first: only return first match
750 * @user_data: (closure): user data passed to the filter function
752 * Runs a filter against all features of the plugins in the registry
753 * and returns a GList with the results.
754 * If the first flag is set, only the first match is
755 * returned (as a list with a single object).
757 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
758 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
763 gst_registry_feature_filter (GstRegistry * registry,
764 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
769 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
771 GST_OBJECT_LOCK (registry);
772 list = gst_filter_run (registry->features, (GstFilterFunc) filter, first,
774 for (g = list; g; g = g->next) {
775 gst_object_ref (GST_PLUGIN_FEATURE_CAST (g->data));
777 GST_OBJECT_UNLOCK (registry);
783 * gst_registry_find_plugin:
784 * @registry: the registry to search
785 * @name: the plugin name to find
787 * Find the plugin with the given name in the registry.
788 * The plugin will be reffed; caller is responsible for unreffing.
790 * Returns: (transfer full): the plugin with the given name or NULL if the
791 * plugin was not found. gst_object_unref() after usage.
796 gst_registry_find_plugin (GstRegistry * registry, const gchar * name)
799 GstPlugin *result = NULL;
801 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
802 g_return_val_if_fail (name != NULL, NULL);
804 walk = gst_registry_plugin_filter (registry,
805 (GstPluginFilter) gst_plugin_name_filter, TRUE, (gpointer) name);
807 result = GST_PLUGIN_CAST (walk->data);
809 gst_object_ref (result);
810 gst_plugin_list_free (walk);
817 * gst_registry_find_feature:
818 * @registry: the registry to search
819 * @name: the pluginfeature name to find
820 * @type: the pluginfeature type to find
822 * Find the pluginfeature with the given name and type in the registry.
824 * Returns: (transfer full): the pluginfeature with the given name and type
825 * or NULL if the plugin was not found. gst_object_unref() after usage.
830 gst_registry_find_feature (GstRegistry * registry, const gchar * name,
833 GstPluginFeature *feature = NULL;
835 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
836 g_return_val_if_fail (name != NULL, NULL);
837 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
839 feature = gst_registry_lookup_feature (registry, name);
840 if (feature && !g_type_is_a (G_TYPE_FROM_INSTANCE (feature), type)) {
841 gst_object_unref (feature);
849 * gst_registry_get_feature_list:
850 * @registry: a #GstRegistry
853 * Retrieves a #GList of #GstPluginFeature of @type.
855 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
856 * #GstPluginFeature of @type. Use gst_plugin_feature_list_free() after use
861 gst_registry_get_feature_list (GstRegistry * registry, GType type)
863 GstTypeNameData data;
865 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
866 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
869 if (type == GST_TYPE_ELEMENT_FACTORY)
870 return gst_registry_get_element_factory_list (registry);
871 else if (type == GST_TYPE_TYPE_FIND_FACTORY)
872 return gst_registry_get_typefind_factory_list (registry);
877 return gst_registry_feature_filter (registry,
878 (GstPluginFeatureFilter) gst_plugin_feature_type_name_filter,
883 * gst_registry_get_plugin_list:
884 * @registry: the registry to search
886 * Get a copy of all plugins registered in the given registry. The refcount
887 * of each element in the list in incremented.
889 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
890 * Use gst_plugin_list_free() after usage.
895 gst_registry_get_plugin_list (GstRegistry * registry)
900 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
902 GST_OBJECT_LOCK (registry);
903 list = g_list_copy (registry->plugins);
904 for (g = list; g; g = g->next) {
905 gst_object_ref (GST_PLUGIN_CAST (g->data));
907 GST_OBJECT_UNLOCK (registry);
912 static GstPluginFeature *
913 gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name)
915 return g_hash_table_lookup (registry->feature_hash, name);
919 * gst_registry_lookup_feature:
920 * @registry: a #GstRegistry
921 * @name: a #GstPluginFeature name
923 * Find a #GstPluginFeature with @name in @registry.
925 * Returns: (transfer full): a #GstPluginFeature with its refcount incremented,
926 * use gst_object_unref() after usage.
931 gst_registry_lookup_feature (GstRegistry * registry, const char *name)
933 GstPluginFeature *feature;
935 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
936 g_return_val_if_fail (name != NULL, NULL);
938 GST_OBJECT_LOCK (registry);
939 feature = gst_registry_lookup_feature_locked (registry, name);
941 gst_object_ref (feature);
942 GST_OBJECT_UNLOCK (registry);
948 gst_registry_lookup_bn_locked (GstRegistry * registry, const char *basename)
950 return g_hash_table_lookup (registry->basename_hash, basename);
954 gst_registry_lookup_bn (GstRegistry * registry, const char *basename)
958 GST_OBJECT_LOCK (registry);
959 plugin = gst_registry_lookup_bn_locked (registry, basename);
961 gst_object_ref (plugin);
962 GST_OBJECT_UNLOCK (registry);
968 * gst_registry_lookup:
969 * @registry: the registry to look up in
970 * @filename: the name of the file to look up
972 * Look up a plugin in the given registry with the given filename.
973 * If found, plugin is reffed.
975 * Returns: (transfer full): the #GstPlugin if found, or NULL if not.
976 * gst_object_unref() after usage.
979 gst_registry_lookup (GstRegistry * registry, const char *filename)
984 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
985 g_return_val_if_fail (filename != NULL, NULL);
987 basename = g_path_get_basename (filename);
988 if (G_UNLIKELY (basename == NULL))
991 plugin = gst_registry_lookup_bn (registry, basename);
1000 REGISTRY_SCAN_HELPER_NOT_STARTED = 0,
1001 REGISTRY_SCAN_HELPER_DISABLED,
1002 REGISTRY_SCAN_HELPER_RUNNING
1003 } GstRegistryScanHelperState;
1007 GstRegistry *registry;
1008 GstRegistryScanHelperState helper_state;
1009 GstPluginLoader *helper;
1011 } GstRegistryScanContext;
1014 init_scan_context (GstRegistryScanContext * context, GstRegistry * registry)
1018 context->registry = registry;
1020 /* see if forking is enabled and set up the scan helper state accordingly */
1021 do_fork = _gst_enable_registry_fork;
1023 const gchar *fork_env;
1025 /* forking enabled, see if it is disabled with an env var */
1026 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
1027 /* fork enabled for any value different from "no" */
1028 do_fork = strcmp (fork_env, "no") != 0;
1033 context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
1035 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1037 context->helper = NULL;
1038 context->changed = FALSE;
1042 clear_scan_context (GstRegistryScanContext * context)
1044 if (context->helper) {
1045 context->changed |= _priv_gst_plugin_loader_funcs.destroy (context->helper);
1046 context->helper = NULL;
1051 gst_registry_scan_plugin_file (GstRegistryScanContext * context,
1052 const gchar * filename, off_t file_size, time_t file_mtime)
1054 gboolean changed = FALSE;
1055 GstPlugin *newplugin = NULL;
1058 /* Disable external plugin loader on Windows until it is ported properly. */
1059 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1063 /* Have a plugin to load - see if the scan-helper needs starting */
1064 if (context->helper_state == REGISTRY_SCAN_HELPER_NOT_STARTED) {
1065 GST_DEBUG ("Starting plugin scanner for file %s", filename);
1066 context->helper = _priv_gst_plugin_loader_funcs.create (context->registry);
1067 if (context->helper != NULL)
1068 context->helper_state = REGISTRY_SCAN_HELPER_RUNNING;
1070 GST_WARNING ("Failed starting plugin scanner. Scanning in-process");
1071 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1075 if (context->helper_state == REGISTRY_SCAN_HELPER_RUNNING) {
1076 GST_DEBUG ("Using scan-helper to load plugin %s", filename);
1077 if (!_priv_gst_plugin_loader_funcs.load (context->helper,
1078 filename, file_size, file_mtime)) {
1079 g_warning ("External plugin loader failed. This most likely means that "
1080 "the plugin loader helper binary was not found or could not be run. "
1081 "%s", (g_getenv ("GST_PLUGIN_PATH") != NULL) ?
1082 "If you are running an uninstalled GStreamer setup, you might need "
1083 "to update your gst-uninstalled script so that the "
1084 "GST_PLUGIN_SCANNER environment variable gets set." : "");
1085 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1089 /* Check if the helper is disabled (or just got disabled above) */
1090 if (context->helper_state == REGISTRY_SCAN_HELPER_DISABLED) {
1091 /* Load plugin the old fashioned way... */
1093 /* We don't use a GError here because a failure to load some shared
1094 * objects as plugins is normal (particularly in the uninstalled case)
1096 newplugin = gst_plugin_load_file (filename, NULL);
1100 GST_DEBUG_OBJECT (context->registry, "marking new plugin %p as registered",
1102 newplugin->registered = TRUE;
1103 gst_object_unref (newplugin);
1107 if (!__registry_reuse_plugin_scanner) {
1108 clear_scan_context (context);
1109 context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
1116 is_blacklisted_hidden_directory (const gchar * dirent)
1118 if (G_LIKELY (dirent[0] != '.'))
1121 /* skip the .debug directory, these contain elf files that are not
1122 * useful or worse, can crash dlopen () */
1123 if (strcmp (dirent, ".debug") == 0)
1126 /* can also skip .git and .deps dirs, those won't contain useful files.
1127 * This speeds up scanning a bit in uninstalled setups. */
1128 if (strcmp (dirent, ".git") == 0 || strcmp (dirent, ".deps") == 0)
1135 gst_registry_scan_path_level (GstRegistryScanContext * context,
1136 const gchar * path, int level)
1139 const gchar *dirent;
1142 gboolean changed = FALSE;
1144 dir = g_dir_open (path, 0, NULL);
1148 while ((dirent = g_dir_read_name (dir))) {
1149 GStatBuf file_status;
1151 filename = g_build_filename (path, dirent, NULL);
1152 if (g_stat (filename, &file_status) < 0) {
1153 /* Plugin will be removed from cache after the scan completes if it
1154 * is still marked 'cached' */
1159 if (file_status.st_mode & S_IFDIR) {
1160 if (G_UNLIKELY (is_blacklisted_hidden_directory (dirent))) {
1161 GST_TRACE_OBJECT (context->registry, "ignoring %s directory", dirent);
1165 /* FIXME 0.11: Don't recurse into directories, this behaviour
1166 * is inconsistent with other PATH environment variables
1169 GST_LOG_OBJECT (context->registry, "recursing into directory %s",
1171 changed |= gst_registry_scan_path_level (context, filename, level - 1);
1173 GST_LOG_OBJECT (context->registry, "not recursing into directory %s, "
1174 "recursion level too deep", filename);
1179 if (!(file_status.st_mode & S_IFREG)) {
1180 GST_TRACE_OBJECT (context->registry, "%s is not a regular file, ignoring",
1185 if (!g_str_has_suffix (dirent, G_MODULE_SUFFIX)
1186 #ifdef GST_EXTRA_MODULE_SUFFIX
1187 && !g_str_has_suffix (dirent, GST_EXTRA_MODULE_SUFFIX)
1190 GST_TRACE_OBJECT (context->registry,
1191 "extension is not recognized as module file, ignoring file %s",
1197 GST_LOG_OBJECT (context->registry, "file %s looks like a possible module",
1200 /* try to avoid unnecessary plugin-move pain */
1201 if (g_str_has_prefix (dirent, "libgstvalve") ||
1202 g_str_has_prefix (dirent, "libgstselector")) {
1203 GST_WARNING_OBJECT (context->registry, "ignoring old plugin %s which "
1204 "has been merged into the corelements plugin", filename);
1205 /* Plugin will be removed from cache after the scan completes if it
1206 * is still marked 'cached' */
1211 /* plug-ins are considered unique by basename; if the given name
1212 * was already seen by the registry, we ignore it */
1213 plugin = gst_registry_lookup_bn (context->registry, dirent);
1215 gboolean env_vars_changed, deps_changed = FALSE;
1217 if (plugin->registered) {
1218 GST_DEBUG_OBJECT (context->registry,
1219 "plugin already registered from path \"%s\"",
1220 GST_STR_NULL (plugin->filename));
1222 gst_object_unref (plugin);
1226 env_vars_changed = _priv_plugin_deps_env_vars_changed (plugin);
1228 /* If a file with a certain basename is seen on a different path,
1229 * update the plugin to ensure the registry cache will reflect up
1230 * to date information */
1232 if (plugin->file_mtime == file_status.st_mtime &&
1233 plugin->file_size == file_status.st_size && !env_vars_changed &&
1234 !(deps_changed = _priv_plugin_deps_files_changed (plugin)) &&
1235 !strcmp (plugin->filename, filename)) {
1236 GST_LOG_OBJECT (context->registry, "file %s cached", filename);
1237 plugin->flags &= ~GST_PLUGIN_FLAG_CACHED;
1238 GST_LOG_OBJECT (context->registry,
1239 "marking plugin %p as registered as %s", plugin, filename);
1240 plugin->registered = TRUE;
1242 GST_INFO_OBJECT (context->registry, "cached info for %s is stale",
1244 GST_DEBUG_OBJECT (context->registry, "mtime %" G_GINT64_FORMAT " != %"
1245 G_GINT64_FORMAT " or size %" G_GINT64_FORMAT " != %"
1246 G_GINT64_FORMAT " or external dependency env_vars changed: %d or"
1247 " external dependencies changed: %d or old path %s != new path %s",
1248 (gint64) plugin->file_mtime, (gint64) file_status.st_mtime,
1249 (gint64) plugin->file_size, (gint64) file_status.st_size,
1250 env_vars_changed, deps_changed, plugin->filename, filename);
1251 gst_registry_remove_plugin (context->registry, plugin);
1252 changed |= gst_registry_scan_plugin_file (context, filename,
1253 file_status.st_size, file_status.st_mtime);
1255 gst_object_unref (plugin);
1258 GST_DEBUG_OBJECT (context->registry, "file %s not yet in registry",
1260 changed |= gst_registry_scan_plugin_file (context, filename,
1261 file_status.st_size, file_status.st_mtime);
1273 gst_registry_scan_path_internal (GstRegistryScanContext * context,
1278 GST_DEBUG_OBJECT (context->registry, "scanning path %s", path);
1279 changed = gst_registry_scan_path_level (context, path, 10);
1281 GST_DEBUG_OBJECT (context->registry, "registry changed in path %s: %d", path,
1287 * gst_registry_scan_path:
1288 * @registry: the registry to add found plugins to
1289 * @path: the path to scan
1291 * Scan the given path for plugins to add to the registry. The syntax of the
1292 * path is specific to the registry.
1294 * Returns: %TRUE if registry changed
1297 gst_registry_scan_path (GstRegistry * registry, const gchar * path)
1299 GstRegistryScanContext context;
1302 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1303 g_return_val_if_fail (path != NULL, FALSE);
1305 init_scan_context (&context, registry);
1307 result = gst_registry_scan_path_internal (&context, path);
1309 clear_scan_context (&context);
1310 result |= context.changed;
1316 _gst_plugin_feature_filter_plugin_name (GstPluginFeature * feature,
1319 return (strcmp (feature->plugin_name, (gchar *) user_data) == 0);
1323 * gst_registry_get_feature_list_by_plugin:
1324 * @registry: a #GstRegistry.
1325 * @name: a plugin name.
1327 * Retrieves a #GList of features of the plugin with name @name.
1329 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
1330 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
1333 gst_registry_get_feature_list_by_plugin (GstRegistry * registry,
1336 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1337 g_return_val_if_fail (name != NULL, NULL);
1339 return gst_registry_feature_filter (registry,
1340 _gst_plugin_feature_filter_plugin_name, FALSE, (gpointer) name);
1343 /* Unref and delete the default registry */
1345 _priv_gst_registry_cleanup (void)
1347 GstRegistry *registry;
1349 g_static_mutex_lock (&_gst_registry_mutex);
1350 if ((registry = _gst_registry_default) != NULL) {
1351 _gst_registry_default = NULL;
1353 g_static_mutex_unlock (&_gst_registry_mutex);
1355 /* unref outside of the lock because we can. */
1357 gst_object_unref (registry);
1361 * gst_default_registry_check_feature_version:
1362 * @feature_name: the name of the feature (e.g. "oggdemux")
1363 * @min_major: the minimum major version number
1364 * @min_minor: the minimum minor version number
1365 * @min_micro: the minimum micro version number
1367 * Checks whether a plugin feature by the given name exists in the
1368 * default registry and whether its version is at least the
1371 * Returns: #TRUE if the feature could be found and the version is
1372 * the same as the required version or newer, and #FALSE otherwise.
1375 gst_default_registry_check_feature_version (const gchar * feature_name,
1376 guint min_major, guint min_minor, guint min_micro)
1378 GstPluginFeature *feature;
1379 GstRegistry *registry;
1380 gboolean ret = FALSE;
1382 g_return_val_if_fail (feature_name != NULL, FALSE);
1384 GST_DEBUG ("Looking up plugin feature '%s'", feature_name);
1386 registry = gst_registry_get_default ();
1387 feature = gst_registry_lookup_feature (registry, feature_name);
1389 ret = gst_plugin_feature_check_version (feature, min_major, min_minor,
1391 gst_object_unref (feature);
1393 GST_DEBUG ("Could not find plugin feature '%s'", feature_name);
1400 load_plugin_func (gpointer data, gpointer user_data)
1403 const gchar *filename;
1406 filename = (const gchar *) data;
1407 GST_DEBUG ("Pre-loading plugin %s", filename);
1409 plugin = gst_plugin_load_file (filename, &err);
1412 GST_INFO ("Loaded plugin: \"%s\"", filename);
1414 gst_default_registry_add_plugin (plugin);
1417 /* Report error to user, and free error */
1418 GST_ERROR ("Failed to load plugin: %s", err->message);
1421 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
1426 #ifndef GST_DISABLE_REGISTRY
1427 /* Unref all plugins marked 'cached', to clear old plugins that no
1428 * longer exist. Returns TRUE if any plugins were removed */
1430 gst_registry_remove_cache_plugins (GstRegistry * registry)
1435 gboolean changed = FALSE;
1437 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1439 GST_OBJECT_LOCK (registry);
1441 GST_DEBUG_OBJECT (registry, "removing cached plugins");
1442 g = registry->plugins;
1446 if (plugin->flags & GST_PLUGIN_FLAG_CACHED) {
1447 GST_DEBUG_OBJECT (registry, "removing cached plugin \"%s\"",
1448 GST_STR_NULL (plugin->filename));
1449 registry->plugins = g_list_delete_link (registry->plugins, g);
1450 if (G_LIKELY (plugin->basename))
1451 g_hash_table_remove (registry->basename_hash, plugin->basename);
1452 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
1453 gst_object_unref (plugin);
1459 GST_OBJECT_UNLOCK (registry);
1466 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
1467 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
1468 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
1469 } GstRegistryScanAndUpdateResult;
1472 * scan_and_update_registry:
1473 * @default_registry: the #GstRegistry
1474 * @registry_file: registry filename
1475 * @write_changes: write registry if it has changed?
1477 * Scans for registry changes and eventually updates the registry cache.
1479 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
1480 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
1481 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
1482 * it has been updated and the cache needs to be re-read.
1484 static GstRegistryScanAndUpdateResult
1485 scan_and_update_registry (GstRegistry * default_registry,
1486 const gchar * registry_file, gboolean write_changes, GError ** error)
1488 const gchar *plugin_path;
1489 gboolean changed = FALSE;
1491 GstRegistryScanContext context;
1493 GST_INFO ("Validating plugins from registry cache: %s", registry_file);
1495 init_scan_context (&context, default_registry);
1497 /* It sounds tempting to just compare the mtime of directories with the mtime
1498 * of the registry cache, but it does not work. It would not catch updated
1499 * plugins, which might bring more or less features.
1502 /* scan paths specified via --gst-plugin-path */
1503 GST_DEBUG ("scanning paths added via --gst-plugin-path");
1504 for (l = _priv_gst_plugin_paths; l != NULL; l = l->next) {
1505 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
1506 changed |= gst_registry_scan_path_internal (&context, (gchar *) l->data);
1508 /* keep plugin_paths around in case a re-scan is forced later on */
1510 /* GST_PLUGIN_PATH specifies a list of directories to scan for
1511 * additional plugins. These take precedence over the system plugins */
1512 plugin_path = g_getenv ("GST_PLUGIN_PATH");
1517 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
1518 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1519 for (i = 0; list[i]; i++) {
1520 changed |= gst_registry_scan_path_internal (&context, list[i]);
1524 GST_DEBUG ("GST_PLUGIN_PATH not set");
1527 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
1528 * loaded by default. If not set, this defaults to the system-installed
1529 * path, and the plugins installed in the user's home directory */
1530 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
1531 if (plugin_path == NULL) {
1534 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
1536 /* plugins in the user's home directory take precedence over
1537 * system-installed ones */
1538 home_plugins = g_build_filename (g_get_home_dir (),
1539 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
1540 GST_DEBUG ("scanning home plugins %s", home_plugins);
1541 changed |= gst_registry_scan_path_internal (&context, home_plugins);
1542 g_free (home_plugins);
1544 /* add the main (installed) library path */
1545 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
1546 changed |= gst_registry_scan_path_internal (&context, PLUGINDIR);
1554 g_win32_get_package_installation_directory_of_module
1555 (_priv_gst_dll_handle);
1557 dir = g_build_filename (base_dir, "lib", "gstreamer-0.10", NULL);
1558 GST_DEBUG ("scanning DLL dir %s", dir);
1560 changed |= gst_registry_scan_path_internal (&context, dir);
1570 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
1571 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1572 for (i = 0; list[i]; i++) {
1573 changed |= gst_registry_scan_path_internal (&context, list[i]);
1578 clear_scan_context (&context);
1579 changed |= context.changed;
1581 /* Remove cached plugins so stale info is cleared. */
1582 changed |= gst_registry_remove_cache_plugins (default_registry);
1585 GST_INFO ("Registry cache has not changed");
1586 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
1589 if (!write_changes) {
1590 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
1591 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1594 GST_INFO ("Registry cache changed. Writing new registry cache");
1595 if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
1596 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
1597 _("Error writing registry cache to %s: %s"),
1598 registry_file, g_strerror (errno));
1599 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1602 GST_INFO ("Registry cache written successfully");
1603 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
1607 ensure_current_registry (GError ** error)
1609 gchar *registry_file;
1610 GstRegistry *default_registry;
1611 gboolean ret = TRUE;
1612 gboolean do_update = TRUE;
1613 gboolean have_cache = TRUE;
1615 default_registry = gst_registry_get_default ();
1616 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
1617 if (registry_file == NULL) {
1618 registry_file = g_build_filename (g_get_home_dir (),
1619 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
1622 if (!_gst_disable_registry_cache) {
1623 GST_INFO ("reading registry cache: %s", registry_file);
1624 have_cache = gst_registry_binary_read_cache (default_registry,
1626 /* Only ever read the registry cache once, then disable it for
1627 * subsequent updates during the program lifetime */
1628 _gst_disable_registry_cache = TRUE;
1632 do_update = !_priv_gst_disable_registry_update;
1634 const gchar *update_env;
1636 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
1637 /* do update for any value different from "no" */
1638 do_update = (strcmp (update_env, "no") != 0);
1644 const gchar *reuse_env;
1646 if ((reuse_env = g_getenv ("GST_REGISTRY_REUSE_PLUGIN_SCANNER"))) {
1647 /* do reuse for any value different from "no" */
1648 __registry_reuse_plugin_scanner = (strcmp (reuse_env, "no") != 0);
1650 /* now check registry */
1651 GST_DEBUG ("Updating registry cache");
1652 scan_and_update_registry (default_registry, registry_file, TRUE, error);
1654 GST_DEBUG ("Not updating registry cache (disabled)");
1657 g_free (registry_file);
1658 GST_INFO ("registry reading and updating done, result = %d", ret);
1662 #endif /* GST_DISABLE_REGISTRY */
1665 * gst_registry_fork_is_enabled:
1667 * By default GStreamer will perform scanning and rebuilding of the
1668 * registry file using a helper child process.
1670 * Applications might want to disable this behaviour with the
1671 * gst_registry_fork_set_enabled() function, in which case new plugins
1672 * are scanned (and loaded) into the application process.
1674 * Returns: %TRUE if GStreamer will use the child helper process when
1675 * rebuilding the registry.
1680 gst_registry_fork_is_enabled (void)
1682 return _gst_enable_registry_fork;
1686 * gst_registry_fork_set_enabled:
1687 * @enabled: whether rebuilding the registry can use a temporary child helper process.
1689 * Applications might want to disable/enable spawning of a child helper process
1690 * when rebuilding the registry. See gst_registry_fork_is_enabled() for more
1696 gst_registry_fork_set_enabled (gboolean enabled)
1698 _gst_enable_registry_fork = enabled;
1702 * gst_update_registry:
1704 * Forces GStreamer to re-scan its plugin paths and update the default
1707 * Applications will almost never need to call this function, it is only
1708 * useful if the application knows new plugins have been installed (or old
1709 * ones removed) since the start of the application (or, to be precise, the
1710 * first call to gst_init()) and the application wants to make use of any
1711 * newly-installed plugins without restarting the application.
1713 * Applications should assume that the registry update is neither atomic nor
1714 * thread-safe and should therefore not have any dynamic pipelines running
1715 * (including the playbin and decodebin elements) and should also not create
1716 * any elements or access the GStreamer registry while the update is in
1719 * Note that this function may block for a significant amount of time.
1721 * Returns: %TRUE if the registry has been updated successfully (does not
1722 * imply that there were changes), otherwise %FALSE.
1727 gst_update_registry (void)
1731 #ifndef GST_DISABLE_REGISTRY
1734 res = ensure_current_registry (&err);
1736 GST_WARNING ("registry update failed: %s", err->message);
1739 GST_LOG ("registry update succeeded");
1743 GST_WARNING ("registry update failed: %s", "registry disabled");
1745 #endif /* GST_DISABLE_REGISTRY */
1747 if (_priv_gst_preload_plugins) {
1748 GST_DEBUG ("Preloading indicated plugins...");
1749 g_slist_foreach (_priv_gst_preload_plugins, load_plugin_func, NULL);
1756 * gst_registry_get_feature_list_cookie:
1757 * @registry: the registry
1759 * Returns the registrys feature list cookie. This changes
1760 * every time a feature is added or removed from the registry.
1762 * Returns: the feature list cookie.
1767 gst_registry_get_feature_list_cookie (GstRegistry * registry)
1769 g_return_val_if_fail (GST_IS_REGISTRY (registry), 0);
1771 return registry->priv->cookie;