2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
5 * gstpluginfeature.c: Abstract base class for all plugin features
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #include "gst_private.h"
25 #include "gstpluginfeature.h"
26 #include "gstplugin.h"
27 #include "gstregistry.h"
30 static void gst_plugin_feature_class_init (GstPluginFeatureClass *klass);
31 static void gst_plugin_feature_init (GstPluginFeature *feature);
33 static GObjectClass *parent_class = NULL;
34 /* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
37 gst_plugin_feature_get_type (void)
39 static GType plugin_feature_type = 0;
41 if (!plugin_feature_type) {
42 static const GTypeInfo plugin_feature_info = {
43 sizeof (GObjectClass),
46 (GClassInitFunc) gst_plugin_feature_class_init,
51 (GInstanceInitFunc) gst_plugin_feature_init,
54 plugin_feature_type = g_type_register_static (G_TYPE_OBJECT, "GstPluginFeature",
55 &plugin_feature_info, G_TYPE_FLAG_ABSTRACT);
57 return plugin_feature_type;
61 gst_plugin_feature_class_init (GstPluginFeatureClass *klass)
63 GObjectClass *gobject_class;
65 gobject_class = (GObjectClass*) klass;
67 parent_class = g_type_class_ref (G_TYPE_OBJECT);
71 gst_plugin_feature_init (GstPluginFeature *feature)
73 feature->manager = NULL;
77 * gst_plugin_feature_ensure_loaded:
78 * @feature: the plugin feature to check
80 * Check if the plugin containing the feature is loaded,
81 * if not, the plugin will be loaded.
83 * Returns: a boolean indicating the feature is loaded.
86 gst_plugin_feature_ensure_loaded (GstPluginFeature *feature)
90 g_return_val_if_fail (feature != NULL, FALSE);
91 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
93 plugin = (GstPlugin *) (feature->manager);
95 if (plugin && !gst_plugin_is_loaded (plugin)) {
96 #ifndef GST_DISABLE_REGISTRY
97 if (GST_IS_REGISTRY (plugin->manager)) {
98 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING,
99 "loading plugin %s for feature", plugin->name);
101 if (gst_registry_load_plugin (GST_REGISTRY (plugin->manager), plugin) != GST_REGISTRY_OK)
105 #endif /* GST_DISABLE_REGISTRY */
112 * gst_plugin_feature_unload_thyself:
113 * @feature: the plugin feature to check
115 * Unload the given feature. This will decrease the refcount
116 * in the plugin and will eventually unload the plugin
119 gst_plugin_feature_unload_thyself (GstPluginFeature *feature)
121 GstPluginFeatureClass *oclass;
123 g_return_if_fail (feature != NULL);
124 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
126 oclass = GST_PLUGIN_FEATURE_GET_CLASS (feature);
128 if (oclass->unload_thyself)
129 oclass->unload_thyself (feature);
133 gst_plugin_feature_type_name_filter (GstPluginFeature *feature,
134 GstTypeNameData *data)
136 return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
137 (data->name == NULL || !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));