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"
32 static void gst_plugin_feature_class_init (GstPluginFeatureClass *klass);
33 static void gst_plugin_feature_init (GstPluginFeature *feature);
35 static GObjectClass *parent_class = NULL;
36 /* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
39 gst_plugin_feature_get_type (void)
41 static GType plugin_feature_type = 0;
43 if (!plugin_feature_type) {
44 static const GTypeInfo plugin_feature_info = {
45 sizeof (GObjectClass),
48 (GClassInitFunc) gst_plugin_feature_class_init,
53 (GInstanceInitFunc) gst_plugin_feature_init,
56 plugin_feature_type = g_type_register_static (G_TYPE_OBJECT, "GstPluginFeature",
57 &plugin_feature_info, G_TYPE_FLAG_ABSTRACT);
59 return plugin_feature_type;
63 gst_plugin_feature_class_init (GstPluginFeatureClass *klass)
65 GObjectClass *gobject_class;
67 gobject_class = (GObjectClass*) klass;
69 parent_class = g_type_class_ref (G_TYPE_OBJECT);
73 gst_plugin_feature_init (GstPluginFeature *feature)
75 feature->manager = NULL;
79 * gst_plugin_feature_ensure_loaded:
80 * @feature: the plugin feature to check
82 * Check if the plugin containing the feature is loaded,
83 * if not, the plugin will be loaded.
85 * Returns: a boolean indicating the feature is loaded.
88 gst_plugin_feature_ensure_loaded (GstPluginFeature *feature)
92 g_return_val_if_fail (feature != NULL, FALSE);
93 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
95 plugin = (GstPlugin *) (feature->manager);
97 if (plugin && !gst_plugin_is_loaded (plugin)) {
98 #ifndef GST_DISABLE_REGISTRY
99 if (GST_IS_REGISTRY (plugin->manager)) {
100 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING,
101 "loading plugin %s for feature", plugin->desc.name);
103 if (gst_registry_load_plugin (GST_REGISTRY (plugin->manager), plugin) != GST_REGISTRY_OK)
107 #endif /* GST_DISABLE_REGISTRY */
114 * gst_plugin_feature_unload_thyself:
115 * @feature: the plugin feature to check
117 * Unload the given feature. This will decrease the refcount
118 * in the plugin and will eventually unload the plugin
121 gst_plugin_feature_unload_thyself (GstPluginFeature *feature)
123 GstPluginFeatureClass *oclass;
125 g_return_if_fail (feature != NULL);
126 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
128 oclass = GST_PLUGIN_FEATURE_GET_CLASS (feature);
130 if (oclass->unload_thyself)
131 oclass->unload_thyself (feature);
135 gst_plugin_feature_type_name_filter (GstPluginFeature *feature,
136 GstTypeNameData *data)
138 return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
139 (data->name == NULL || !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));
142 * gst_plugin_feature_set_rank:
143 * @feature: feature to rank
144 * @rank: rank value - higher number means more priority rank
146 * Specifies a rank for a plugin feature, so that autoplugging uses
147 * the most appropriate feature.
150 gst_plugin_feature_set_rank (GstPluginFeature *feature, guint16 rank)
152 g_return_if_fail (feature != NULL);
153 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
155 feature->rank = rank;
158 * gst_plugin_feature_set_rank:
159 * @feature: a feature
160 * @name: the name to set
162 * Sets the name of a plugin feature. The name uniquely identifies a feature
163 * within all features of the same type. Renaming a plugin feature is not
167 gst_plugin_feature_set_name (GstPluginFeature *feature, const gchar *name)
169 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
170 g_return_if_fail (name != NULL);
173 g_return_if_fail (strcmp (feature->name, name) == 0);
175 feature->name = g_strdup (name);