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;
37 /* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
40 gst_plugin_feature_get_type (void)
42 static GType plugin_feature_type = 0;
44 if (!plugin_feature_type) {
45 static const GTypeInfo plugin_feature_info = {
46 sizeof (GObjectClass),
49 (GClassInitFunc) gst_plugin_feature_class_init,
54 (GInstanceInitFunc) gst_plugin_feature_init,
58 g_type_register_static (G_TYPE_OBJECT, "GstPluginFeature",
59 &plugin_feature_info, G_TYPE_FLAG_ABSTRACT);
61 return plugin_feature_type;
65 gst_plugin_feature_class_init (GstPluginFeatureClass * klass)
67 GObjectClass *gobject_class;
69 gobject_class = (GObjectClass *) klass;
71 parent_class = g_type_class_ref (G_TYPE_OBJECT);
75 gst_plugin_feature_init (GstPluginFeature * feature)
77 feature->manager = NULL;
81 * gst_plugin_feature_ensure_loaded:
82 * @feature: the plugin feature to check
84 * Check if the plugin containing the feature is loaded,
85 * if not, the plugin will be loaded.
87 * Returns: a boolean indicating the feature is loaded.
90 gst_plugin_feature_ensure_loaded (GstPluginFeature * feature)
94 g_return_val_if_fail (feature != NULL, FALSE);
95 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
97 plugin = (GstPlugin *) (feature->manager);
99 if (plugin && !gst_plugin_is_loaded (plugin)) {
100 #ifndef GST_DISABLE_REGISTRY
101 if (GST_IS_REGISTRY (plugin->manager)) {
102 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING,
103 "loading plugin %s for feature", plugin->desc.name);
105 if (gst_registry_load_plugin (GST_REGISTRY (plugin->manager),
106 plugin) != GST_REGISTRY_OK)
109 #endif /* GST_DISABLE_REGISTRY */
116 * gst_plugin_feature_unload_thyself:
117 * @feature: the plugin feature to check
119 * Unload the given feature. This will decrease the refcount
120 * in the plugin and will eventually unload the plugin
123 gst_plugin_feature_unload_thyself (GstPluginFeature * feature)
125 GstPluginFeatureClass *oclass;
127 g_return_if_fail (feature != NULL);
128 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
130 oclass = GST_PLUGIN_FEATURE_GET_CLASS (feature);
132 if (oclass->unload_thyself)
133 oclass->unload_thyself (feature);
137 gst_plugin_feature_type_name_filter (GstPluginFeature * feature,
138 GstTypeNameData * data)
140 return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
142 || !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));
146 * gst_plugin_feature_set_rank:
147 * @feature: feature to rank
148 * @rank: rank value - higher number means more priority rank
150 * Specifies a rank for a plugin feature, so that autoplugging uses
151 * the most appropriate feature.
154 gst_plugin_feature_set_rank (GstPluginFeature * feature, guint rank)
156 g_return_if_fail (feature != NULL);
157 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
159 feature->rank = rank;
163 * gst_plugin_feature_set_name:
164 * @feature: a feature
165 * @name: the name to set
167 * Sets the name of a plugin feature. The name uniquely identifies a feature
168 * within all features of the same type. Renaming a plugin feature is not
172 gst_plugin_feature_set_name (GstPluginFeature * feature, const gchar * name)
174 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
175 g_return_if_fail (name != NULL);
178 g_return_if_fail (strcmp (feature->name, name) == 0);
180 feature->name = g_strdup (name);
185 * gst_plugin_feature_get rank:
186 * @feature: a feature
188 * Gets the rank of a plugin feature.
190 * Returns: The rank of the feature
193 gst_plugin_feature_get_rank (GstPluginFeature * feature)
195 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), GST_RANK_NONE);
197 return feature->rank;
201 * gst_plugin_feature_get_name:
202 * @feature: a feature
204 * Gets the name of a plugin feature.
208 G_CONST_RETURN gchar *
209 gst_plugin_feature_get_name (GstPluginFeature * feature)
211 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), NULL);
213 return feature->name;