/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2005 David A. Schleef * * gstregistry.c: handle registry * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:gstregistry * @short_description: Abstract base class for management of #GstPlugin objects * @see_also: #GstPlugin, #GstPluginFeature * * One registry holds the metadata of a set of plugins. * All registries build the #GstRegistryPool. * * Design: * * The #GstRegistry object is a list of plugins and some functions for dealing * with them. #GstPlugins are matched 1-1 with a file on disk, and may or may * not be loaded at a given time. There may be multiple #GstRegistry objects, * but the "default registry" is the only object that has any meaning to the * core. * * The registry.xml file is actually a cache of plugin information. This is * unlike versions prior to 0.10, where the registry file was the primary source * of plugin information, and was created by the gst-register command. * * The primary source, at all times, of plugin information is each plugin file * itself. Thus, if an application wants information about a particular plugin, * or wants to search for a feature that satisfies given criteria, the primary * means of doing so is to load every plugin and look at the resulting * information that is gathered in the default registry. Clearly, this is a time * consuming process, so we cache information in the registry.xml file. * * On startup, plugins are searched for in the plugin search path. This path can * be set directly using the %GST_PLUGIN_PATH environment variable. The registry * file is loaded from ~/.gstreamer-$GST_MAJORMINOR/registry-$ARCH.xml or the * file listed in the %GST_REGISTRY env var. The only reason to change the * registry location is for testing. * * For each plugin that is found in the plugin search path, there could be 3 * possibilities for cached information: * * * the cache may not contain information about a given file. * * * the cache may have stale information. * * * the cache may have current information. * * * * In the first two cases, the plugin is loaded and the cache updated. In * addition to these cases, the cache may have entries for plugins that are not * relevant to the current process. These are marked as not available to the * current process. If the cache is updated for whatever reason, it is marked * dirty. * * A dirty cache is written out at the end of initialization. Each entry is * checked to make sure the information is minimally valid. If not, the entry is * simply dropped. * * Implementation notes: * * The "cache" and "default registry" are different concepts and can represent * different sets of plugins. For various reasons, at init time, the cache is * stored in the default registry, and plugins not relevant to the current * process are marked with the %GST_PLUGIN_FLAG_CACHED bit. These plugins are * removed at the end of intitialization. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gst_private.h" #include #include #include #ifdef HAVE_UNISTD_H #include #endif #include #include #include #include "gstinfo.h" #include "gstregistry.h" #include "gstmarshal.h" #include "gstfilter.h" #define GST_CAT_DEFAULT GST_CAT_REGISTRY /* the one instance of the default registry and the mutex protecting the * variable. */ static GStaticMutex _gst_registry_mutex = G_STATIC_MUTEX_INIT; static GstRegistry *_gst_registry_default = NULL; /* Element signals and args */ enum { PLUGIN_ADDED, FEATURE_ADDED, LAST_SIGNAL }; static void gst_registry_class_init (GstRegistryClass * klass); static void gst_registry_init (GstRegistry * registry); static void gst_registry_finalize (GObject * object); static guint gst_registry_signals[LAST_SIGNAL] = { 0 }; static GstPluginFeature *gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name); static GstPlugin *gst_registry_lookup_locked (GstRegistry * registry, const char *filename); G_DEFINE_TYPE (GstRegistry, gst_registry, GST_TYPE_OBJECT); static GstObjectClass *parent_class = NULL; static void gst_registry_class_init (GstRegistryClass * klass) { GObjectClass *gobject_class; gobject_class = (GObjectClass *) klass; parent_class = g_type_class_peek_parent (klass); gst_registry_signals[PLUGIN_ADDED] = g_signal_new ("plugin-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, plugin_added), NULL, NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER); gst_registry_signals[FEATURE_ADDED] = g_signal_new ("feature-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRegistryClass, feature_added), NULL, NULL, gst_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER); gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_registry_finalize); } static void gst_registry_init (GstRegistry * registry) { } static void gst_registry_finalize (GObject * object) { GstRegistry *registry = GST_REGISTRY (object); GList *plugins, *p; GList *features, *f; plugins = registry->plugins; registry->plugins = NULL; GST_DEBUG_OBJECT (registry, "registry finalize"); p = plugins; while (p) { GstPlugin *plugin = p->data; if (plugin) { GST_DEBUG_OBJECT (registry, "removing plugin %s", gst_plugin_get_name (plugin)); gst_object_unref (plugin); } p = g_list_next (p); } g_list_free (plugins); features = registry->features; registry->features = NULL; f = features; while (f) { GstPluginFeature *feature = f->data; if (feature) { GST_DEBUG_OBJECT (registry, "removing feature %p (%s)", feature, gst_plugin_feature_get_name (feature)); gst_object_unref (feature); } f = g_list_next (f); } g_list_free (features); G_OBJECT_CLASS (parent_class)->finalize (object); } /** * gst_registry_get_default: * * Retrieves the default registry. The caller does not own a reference on the * registry, as it is alive as long as GStreamer is initialized. * * Returns: The default #GstRegistry. */ GstRegistry * gst_registry_get_default (void) { GstRegistry *registry; g_static_mutex_lock (&_gst_registry_mutex); if (G_UNLIKELY (!_gst_registry_default)) { _gst_registry_default = g_object_new (GST_TYPE_REGISTRY, NULL); gst_object_ref (GST_OBJECT_CAST (_gst_registry_default)); gst_object_sink (GST_OBJECT_CAST (_gst_registry_default)); } registry = _gst_registry_default; g_static_mutex_unlock (&_gst_registry_mutex); return registry; } /** * gst_registry_add_path: * @registry: the registry to add the path to * @path: the path to add to the registry * * Add the given path to the registry. The syntax of the * path is specific to the registry. If the path has already been * added, do nothing. */ void gst_registry_add_path (GstRegistry * registry, const gchar * path) { g_return_if_fail (GST_IS_REGISTRY (registry)); g_return_if_fail (path != NULL); if (strlen (path) == 0) goto empty_path; GST_OBJECT_LOCK (registry); if (g_list_find_custom (registry->paths, path, (GCompareFunc) strcmp)) goto was_added; GST_INFO ("Adding plugin path: \"%s\"", path); registry->paths = g_list_append (registry->paths, g_strdup (path)); GST_OBJECT_UNLOCK (registry); return; empty_path: { GST_INFO ("Ignoring empty plugin path"); return; } was_added: { g_warning ("path %s already added to registry", path); GST_OBJECT_UNLOCK (registry); return; } } /** * gst_registry_get_path_list: * @registry: the registry to get the pathlist of * * Get the list of paths for the given registry. * * Returns: A Glist of paths as strings. g_list_free after use. * * MT safe. */ GList * gst_registry_get_path_list (GstRegistry * registry) { GList *list; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); GST_OBJECT_LOCK (registry); /* We don't need to copy the strings, because they won't be deleted * as long as the GstRegistry is around */ list = g_list_copy (registry->paths); GST_OBJECT_UNLOCK (registry); return list; } /** * gst_registry_add_plugin: * @registry: the registry to add the plugin to * @plugin: the plugin to add * * Add the plugin to the registry. The plugin-added signal will be emitted. * This function will sink @plugin. * * Returns: TRUE on success. * * MT safe. */ gboolean gst_registry_add_plugin (GstRegistry * registry, GstPlugin * plugin) { GstPlugin *existing_plugin; g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE); g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE); GST_OBJECT_LOCK (registry); existing_plugin = gst_registry_lookup_locked (registry, plugin->filename); if (G_UNLIKELY (existing_plugin)) { GST_DEBUG_OBJECT (registry, "Replacing existing plugin %p with new plugin %p for filename \"%s\"", existing_plugin, plugin, GST_STR_NULL (plugin->filename)); registry->plugins = g_list_remove (registry->plugins, existing_plugin); gst_object_unref (existing_plugin); } GST_DEBUG_OBJECT (registry, "adding plugin %p for filename \"%s\"", plugin, GST_STR_NULL (plugin->filename)); registry->plugins = g_list_prepend (registry->plugins, plugin); gst_object_ref (plugin); gst_object_sink (plugin); GST_OBJECT_UNLOCK (registry); GST_DEBUG_OBJECT (registry, "emitting plugin-added for filename \"%s\"", GST_STR_NULL (plugin->filename)); g_signal_emit (G_OBJECT (registry), gst_registry_signals[PLUGIN_ADDED], 0, plugin); return TRUE; } static void gst_registry_remove_features_for_plugin_unlocked (GstRegistry * registry, GstPlugin * plugin) { GList *f; g_return_if_fail (GST_IS_REGISTRY (registry)); g_return_if_fail (GST_IS_PLUGIN (plugin)); /* Remove all features for this plugin */ f = registry->features; while (f != NULL) { GList *next = g_list_next (f); GstPluginFeature *feature = f->data; if (feature && !strcmp (feature->plugin_name, gst_plugin_get_name (plugin))) { GST_DEBUG_OBJECT (registry, "removing feature %p (%s) for plugin %s", feature, gst_plugin_feature_get_name (feature), gst_plugin_get_name (plugin)); registry->features = g_list_delete_link (registry->features, f); gst_object_unref (feature); } f = next; } } /** * gst_registry_remove_plugin: * @registry: the registry to remove the plugin from * @plugin: the plugin to remove * * Remove the plugin from the registry. * * MT safe. */ void gst_registry_remove_plugin (GstRegistry * registry, GstPlugin * plugin) { g_return_if_fail (GST_IS_REGISTRY (registry)); g_return_if_fail (GST_IS_PLUGIN (plugin)); GST_DEBUG_OBJECT (registry, "removing plugin %p (%s)", plugin, gst_plugin_get_name (plugin)); GST_OBJECT_LOCK (registry); registry->plugins = g_list_remove (registry->plugins, plugin); gst_registry_remove_features_for_plugin_unlocked (registry, plugin); GST_OBJECT_UNLOCK (registry); gst_object_unref (plugin); } /** * gst_registry_add_feature: * @registry: the registry to add the plugin to * @feature: the feature to add * * Add the feature to the registry. The feature-added signal will be emitted. * This function sinks @feature. * * Returns: TRUE on success. * * MT safe. */ gboolean gst_registry_add_feature (GstRegistry * registry, GstPluginFeature * feature) { GstPluginFeature *existing_feature; g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE); g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE); g_return_val_if_fail (feature->name != NULL, FALSE); g_return_val_if_fail (feature->plugin_name != NULL, FALSE); GST_OBJECT_LOCK (registry); existing_feature = gst_registry_lookup_feature_locked (registry, feature->name); if (G_UNLIKELY (existing_feature)) { GST_DEBUG_OBJECT (registry, "Replacing existing feature %p (%s)", existing_feature, feature->name); registry->features = g_list_remove (registry->features, existing_feature); gst_object_unref (existing_feature); } GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature, feature->name); registry->features = g_list_prepend (registry->features, feature); gst_object_ref (feature); gst_object_sink (feature); GST_OBJECT_UNLOCK (registry); GST_DEBUG_OBJECT (registry, "emitting feature-added for %s", feature->name); g_signal_emit (G_OBJECT (registry), gst_registry_signals[FEATURE_ADDED], 0, feature); return TRUE; } /** * gst_registry_remove_feature: * @registry: the registry to remove the feature from * @feature: the feature to remove * * Remove the feature from the registry. * * MT safe. */ void gst_registry_remove_feature (GstRegistry * registry, GstPluginFeature * feature) { g_return_if_fail (GST_IS_REGISTRY (registry)); g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature)); GST_DEBUG_OBJECT (registry, "removing feature %p (%s)", feature, gst_plugin_feature_get_name (feature)); GST_OBJECT_LOCK (registry); registry->features = g_list_remove (registry->features, feature); GST_OBJECT_UNLOCK (registry); gst_object_unref (feature); } /** * gst_registry_plugin_filter: * @registry: registry to query * @filter: the filter to use * @first: only return first match * @user_data: user data passed to the filter function * * Runs a filter against all plugins in the registry and returns a #GList with * the results. If the first flag is set, only the first match is * returned (as a list with a single object). * Every plugin is reffed; use gst_plugin_list_free() after use, which * will unref again. * * Returns: a #GList of #GstPlugin. Use gst_plugin_list_free() after usage. * * MT safe. */ GList * gst_registry_plugin_filter (GstRegistry * registry, GstPluginFilter filter, gboolean first, gpointer user_data) { GList *list; GList *g; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); GST_OBJECT_LOCK (registry); list = gst_filter_run (registry->plugins, (GstFilterFunc) filter, first, user_data); for (g = list; g; g = g->next) { gst_object_ref (GST_PLUGIN_CAST (g->data)); } GST_OBJECT_UNLOCK (registry); return list; } /** * gst_registry_feature_filter: * @registry: registry to query * @filter: the filter to use * @first: only return first match * @user_data: user data passed to the filter function * * Runs a filter against all features of the plugins in the registry * and returns a GList with the results. * If the first flag is set, only the first match is * returned (as a list with a single object). * * Returns: a GList of plugin features, gst_plugin_feature_list_free after use. * * MT safe. */ GList * gst_registry_feature_filter (GstRegistry * registry, GstPluginFeatureFilter filter, gboolean first, gpointer user_data) { GList *list; GList *g; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); GST_OBJECT_LOCK (registry); list = gst_filter_run (registry->features, (GstFilterFunc) filter, first, user_data); for (g = list; g; g = g->next) { gst_object_ref (GST_PLUGIN_FEATURE_CAST (g->data)); } GST_OBJECT_UNLOCK (registry); return list; } /** * gst_registry_find_plugin: * @registry: the registry to search * @name: the plugin name to find * * Find the plugin with the given name in the registry. * The plugin will be reffed; caller is responsible for unreffing. * * Returns: The plugin with the given name or NULL if the plugin was not found. * gst_object_unref() after usage. * * MT safe. */ GstPlugin * gst_registry_find_plugin (GstRegistry * registry, const gchar * name) { GList *walk; GstPlugin *result = NULL; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (name != NULL, NULL); walk = gst_registry_plugin_filter (registry, (GstPluginFilter) gst_plugin_name_filter, TRUE, (gpointer) name); if (walk) { result = GST_PLUGIN_CAST (walk->data); gst_object_ref (result); gst_plugin_list_free (walk); } return result; } /** * gst_registry_find_feature: * @registry: the registry to search * @name: the pluginfeature name to find * @type: the pluginfeature type to find * * Find the pluginfeature with the given name and type in the registry. * * Returns: The pluginfeature with the given name and type or NULL * if the plugin was not found. gst_object_unref() after usage. * * MT safe. */ GstPluginFeature * gst_registry_find_feature (GstRegistry * registry, const gchar * name, GType type) { GstPluginFeature *feature = NULL; GList *walk; GstTypeNameData data; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (name != NULL, NULL); g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL); data.name = name; data.type = type; walk = gst_registry_feature_filter (registry, (GstPluginFeatureFilter) gst_plugin_feature_type_name_filter, TRUE, &data); if (walk) { feature = GST_PLUGIN_FEATURE_CAST (walk->data); gst_object_ref (feature); gst_plugin_feature_list_free (walk); } return feature; } /** * gst_registry_get_feature_list: * @registry: a #GstRegistry * @type: a #GType. * * Retrieves a #GList of #GstPluginFeature of @type. * * Returns: a #GList of #GstPluginFeature of @type. gst_plugin_feature_list_free * after usage. * * MT safe. */ GList * gst_registry_get_feature_list (GstRegistry * registry, GType type) { GstTypeNameData data; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL); data.type = type; data.name = NULL; return gst_registry_feature_filter (registry, (GstPluginFeatureFilter) gst_plugin_feature_type_name_filter, FALSE, &data); } /** * gst_registry_get_plugin_list: * @registry: the registry to search * * Get a copy of all plugins registered in the given registry. The refcount * of each element in the list in incremented. * * Returns: a #GList of #GstPlugin. gst_plugin_list_free after use. * * MT safe. */ GList * gst_registry_get_plugin_list (GstRegistry * registry) { GList *list; GList *g; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); GST_OBJECT_LOCK (registry); list = g_list_copy (registry->plugins); for (g = list; g; g = g->next) { gst_object_ref (GST_PLUGIN_CAST (g->data)); } GST_OBJECT_UNLOCK (registry); return list; } static GstPluginFeature * gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name) { GList *g; GstPluginFeature *feature; if (G_UNLIKELY (name == NULL)) return NULL; for (g = registry->features; g; g = g_list_next (g)) { feature = GST_PLUGIN_FEATURE_CAST (g->data); if (feature->name && strcmp (name, feature->name) == 0) { return feature; } } return NULL; } /** * gst_registry_lookup_feature: * @registry: a #GstRegistry * @name: a #GstPluginFeature name * * Find a #GstPluginFeature with @name in @registry. * * Returns: a #GstPluginFeature with its refcount incremented, use * gst_object_unref() after usage. * * MT safe. */ GstPluginFeature * gst_registry_lookup_feature (GstRegistry * registry, const char *name) { GstPluginFeature *feature; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (name != NULL, NULL); GST_OBJECT_LOCK (registry); feature = gst_registry_lookup_feature_locked (registry, name); if (feature) gst_object_ref (feature); GST_OBJECT_UNLOCK (registry); return feature; } static GstPlugin * gst_registry_lookup_locked (GstRegistry * registry, const char *filename) { GList *g; GstPlugin *plugin; gchar *basename; if (G_UNLIKELY (filename == NULL)) return NULL; basename = g_path_get_basename (filename); for (g = registry->plugins; g; g = g_list_next (g)) { plugin = GST_PLUGIN_CAST (g->data); if (plugin->basename && strcmp (basename, plugin->basename) == 0) { g_free (basename); return plugin; } } g_free (basename); return NULL; } /** * gst_registry_lookup: * @registry: the registry to look up in * @filename: the name of the file to look up * * Look up a plugin in the given registry with the given filename. * If found, plugin is reffed. * * Returns: the #GstPlugin if found, or NULL if not. gst_object_unref() * after usage. */ GstPlugin * gst_registry_lookup (GstRegistry * registry, const char *filename) { GstPlugin *plugin; g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (filename != NULL, NULL); GST_OBJECT_LOCK (registry); plugin = gst_registry_lookup_locked (registry, filename); if (plugin) gst_object_ref (plugin); GST_OBJECT_UNLOCK (registry); return plugin; } static gboolean gst_registry_scan_path_level (GstRegistry * registry, const gchar * path, int level) { GDir *dir; const gchar *dirent; gchar *filename; GstPlugin *plugin; GstPlugin *newplugin; gboolean changed = FALSE; dir = g_dir_open (path, 0, NULL); if (!dir) return FALSE; while ((dirent = g_dir_read_name (dir))) { filename = g_strjoin ("/", path, dirent, NULL); GST_LOG_OBJECT (registry, "examining file: %s", filename); if (g_file_test (filename, G_FILE_TEST_IS_DIR)) { if (level > 0) { GST_LOG_OBJECT (registry, "found directory, recursing"); changed |= gst_registry_scan_path_level (registry, filename, level - 1); } else { GST_LOG_OBJECT (registry, "found directory, but recursion level is too deep"); } g_free (filename); continue; } if (!g_file_test (filename, G_FILE_TEST_IS_REGULAR)) { GST_LOG_OBJECT (registry, "not a regular file, ignoring"); g_free (filename); continue; } if (!g_str_has_suffix (filename, ".so") && !g_str_has_suffix (filename, ".dll") && !g_str_has_suffix (filename, ".dynlib")) { GST_LOG_OBJECT (registry, "extension is not recognized as module file, ignoring"); g_free (filename); continue; } /* plug-ins are considered unique by basename; if the given name * was already seen by the registry, we ignore it */ plugin = gst_registry_lookup (registry, filename); if (plugin) { struct stat file_status; if (stat (filename, &file_status)) { /* Plugin will be removed from cache after the scan completes if it * is still marked 'cached' */ g_free (filename); gst_object_unref (plugin); continue; } if (plugin->registered) { GST_DEBUG_OBJECT (registry, "plugin already registered from path \"%s\"", GST_STR_NULL (plugin->filename)); g_free (filename); gst_object_unref (plugin); continue; } if (plugin->file_mtime == file_status.st_mtime && plugin->file_size == file_status.st_size) { GST_DEBUG_OBJECT (registry, "file %s cached", filename); plugin->flags &= ~GST_PLUGIN_FLAG_CACHED; GST_DEBUG_OBJECT (registry, "marking plugin %p as registered as %s", plugin, filename); plugin->registered = TRUE; /* Update the file path on which we've seen this cached plugin * to ensure the registry cache will reflect up to date information */ if (strcmp (plugin->filename, filename) != 0) { g_free (plugin->filename); plugin->filename = g_strdup (filename); changed = TRUE; } } else { GST_INFO_OBJECT (registry, "cached info for %s is stale", filename); GST_DEBUG_OBJECT (registry, "mtime %ld != %ld or size %" G_GSIZE_FORMAT " != %" G_GSIZE_FORMAT, plugin->file_mtime, file_status.st_mtime, plugin->file_size, file_status.st_size); gst_registry_remove_plugin (gst_registry_get_default (), plugin); newplugin = gst_plugin_load_file (filename, NULL); if (newplugin) { GST_DEBUG_OBJECT (registry, "marking new plugin %p as registered", newplugin); newplugin->registered = TRUE; gst_object_unref (newplugin); } changed = TRUE; } gst_object_unref (plugin); } else { GST_DEBUG_OBJECT (registry, "file %s not yet in registry", filename); newplugin = gst_plugin_load_file (filename, NULL); if (newplugin) { newplugin->registered = TRUE; gst_object_unref (newplugin); changed = TRUE; } } g_free (filename); } g_dir_close (dir); return changed; } /** * gst_registry_scan_path: * @registry: the registry to add the path to * @path: the path to add to the registry * * Add the given path to the registry. The syntax of the * path is specific to the registry. If the path has already been * added, do nothing. * * Returns: %TRUE if registry changed */ gboolean gst_registry_scan_path (GstRegistry * registry, const gchar * path) { gboolean changed; g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE); g_return_val_if_fail (path != NULL, FALSE); GST_DEBUG_OBJECT (registry, "scanning path %s", path); changed = gst_registry_scan_path_level (registry, path, 10); GST_DEBUG_OBJECT (registry, "registry changed in path %s: %d", path, changed); return changed; } /* Unref all plugins marked 'cached', to clear old plugins that no * longer exist. Returns TRUE if any plugins were removed */ gboolean _priv_gst_registry_remove_cache_plugins (GstRegistry * registry) { GList *g; GList *g_next; GstPlugin *plugin; gboolean changed = FALSE; g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE); GST_OBJECT_LOCK (registry); GST_DEBUG_OBJECT (registry, "removing cached plugins"); g = registry->plugins; while (g) { g_next = g->next; plugin = g->data; if (plugin->flags & GST_PLUGIN_FLAG_CACHED) { GST_DEBUG_OBJECT (registry, "removing cached plugin \"%s\"", GST_STR_NULL (plugin->filename)); registry->plugins = g_list_delete_link (registry->plugins, g); gst_object_unref (plugin); changed = TRUE; } g = g_next; } GST_OBJECT_UNLOCK (registry); return changed; } static gboolean _gst_plugin_feature_filter_plugin_name (GstPluginFeature * feature, gpointer user_data) { return (strcmp (feature->plugin_name, (gchar *) user_data) == 0); } /** * gst_registry_get_feature_list_by_plugin: * @registry: a #GstRegistry. * @name: a plugin name. * * Retrieves a #GList of features of the plugin with name @name. * * Returns: a #GList of #GstPluginFeature. gst_plugin_feature_list_free() after usage. */ GList * gst_registry_get_feature_list_by_plugin (GstRegistry * registry, const gchar * name) { g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL); g_return_val_if_fail (name != NULL, NULL); return gst_registry_feature_filter (registry, _gst_plugin_feature_filter_plugin_name, FALSE, (gpointer) name); } /* Unref and delete the default registry */ void _priv_gst_registry_cleanup () { GstRegistry *registry; g_static_mutex_lock (&_gst_registry_mutex); if ((registry = _gst_registry_default) != NULL) { _gst_registry_default = NULL; } g_static_mutex_unlock (&_gst_registry_mutex); /* unref outside of the lock because we can. */ if (registry) gst_object_unref (registry); } /** * gst_default_registry_check_feature_version: * @feature_name: the name of the feature (e.g. "oggdemux") * @min_major: the minimum major version number * @min_minor: the minimum minor version number * @min_micro: the minimum micro version number * * Checks whether a plugin feature by the given name exists in the * default registry and whether its version is at least the * version required. * * Returns: #TRUE if the feature could be found and the version is * the same as the required version or newer, and #FALSE otherwise. */ gboolean gst_default_registry_check_feature_version (const gchar * feature_name, guint min_major, guint min_minor, guint min_micro) { GstPluginFeature *feature; GstRegistry *registry; gboolean ret = FALSE; g_return_val_if_fail (feature_name != NULL, FALSE); GST_DEBUG ("Looking up plugin feature '%s'", feature_name); registry = gst_registry_get_default (); feature = gst_registry_lookup_feature (registry, feature_name); if (feature) { ret = gst_plugin_feature_check_version (feature, min_major, min_minor, min_micro); gst_object_unref (feature); } else { GST_DEBUG ("Could not find plugin feature '%s'", feature_name); } return ret; }