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"
24 #include "gstpluginfeature.h"
25 #include "gstplugin.h"
26 #include "gstregistry.h"
29 static void gst_plugin_feature_class_init (GstPluginFeatureClass *klass);
30 static void gst_plugin_feature_init (GstPluginFeature *feature);
32 static GObjectClass *parent_class = NULL;
33 /* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
36 gst_plugin_feature_get_type (void)
38 static GType plugin_feature_type = 0;
40 if (!plugin_feature_type) {
41 static const GTypeInfo plugin_feature_info = {
42 sizeof (GObjectClass),
45 (GClassInitFunc) gst_plugin_feature_class_init,
50 (GInstanceInitFunc) gst_plugin_feature_init,
53 plugin_feature_type = g_type_register_static (G_TYPE_OBJECT, "GstPluginFeature",
54 &plugin_feature_info, G_TYPE_FLAG_ABSTRACT);
56 return plugin_feature_type;
60 gst_plugin_feature_class_init (GstPluginFeatureClass *klass)
62 GObjectClass *gobject_class;
64 gobject_class = (GObjectClass*) klass;
66 parent_class = g_type_class_ref (G_TYPE_OBJECT);
70 gst_plugin_feature_init (GstPluginFeature *feature)
72 feature->manager = NULL;
76 * gst_plugin_feature_ensure_loaded:
77 * @feature: the plugin feature to check
79 * Check if the plugin containing the feature is loaded,
80 * if not, the plugin will be loaded.
82 * Returns: a boolean indicating the feature is loaded.
85 gst_plugin_feature_ensure_loaded (GstPluginFeature *feature)
89 g_return_val_if_fail (feature != NULL, FALSE);
90 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
92 plugin = (GstPlugin *) (feature->manager);
94 if (plugin && !gst_plugin_is_loaded (plugin)) {
95 if (GST_IS_REGISTRY (plugin->manager)) {
96 GST_DEBUG (GST_CAT_PLUGIN_LOADING,
97 "loading plugin %s for feature", plugin->name);
99 if (gst_registry_load_plugin (GST_REGISTRY (plugin->manager), plugin) != GST_REGISTRY_OK)
109 * gst_plugin_feature_unload_thyself:
110 * @feature: the plugin feature to check
112 * Unload the given feature. This will decrease the refcount
113 * in the plugin and will eventually unload the plugin
116 gst_plugin_feature_unload_thyself (GstPluginFeature *feature)
118 GstPluginFeatureClass *oclass;
120 g_return_if_fail (feature != NULL);
121 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
123 oclass = GST_PLUGIN_FEATURE_GET_CLASS (feature);
125 if (oclass->unload_thyself)
126 oclass->unload_thyself (feature);