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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstpluginfeature.c: Abstract base class for all plugin features
*
* 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.
*/
#include "gst_private.h"
#include "gstpluginfeature.h"
#include "gstplugin.h"
#include "gstregistry.h"
#include "gstinfo.h"
#include <string.h>
static void gst_plugin_feature_class_init (GstPluginFeatureClass *klass);
static void gst_plugin_feature_init (GstPluginFeature *feature);
static GObjectClass *parent_class = NULL;
/* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_plugin_feature_get_type (void)
{
static GType plugin_feature_type = 0;
if (!plugin_feature_type) {
static const GTypeInfo plugin_feature_info = {
sizeof (GObjectClass),
NULL,
NULL,
(GClassInitFunc) gst_plugin_feature_class_init,
NULL,
NULL,
sizeof (GObject),
32,
(GInstanceInitFunc) gst_plugin_feature_init,
NULL
};
plugin_feature_type = g_type_register_static (G_TYPE_OBJECT, "GstPluginFeature",
&plugin_feature_info, G_TYPE_FLAG_ABSTRACT);
}
return plugin_feature_type;
}
static void
gst_plugin_feature_class_init (GstPluginFeatureClass *klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass*) klass;
parent_class = g_type_class_ref (G_TYPE_OBJECT);
}
static void
gst_plugin_feature_init (GstPluginFeature *feature)
{
feature->manager = NULL;
}
/**
* gst_plugin_feature_ensure_loaded:
* @feature: the plugin feature to check
*
* Check if the plugin containing the feature is loaded,
* if not, the plugin will be loaded.
*
* Returns: a boolean indicating the feature is loaded.
*/
gboolean
gst_plugin_feature_ensure_loaded (GstPluginFeature *feature)
{
GstPlugin *plugin;
g_return_val_if_fail (feature != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
plugin = (GstPlugin *) (feature->manager);
if (plugin && !gst_plugin_is_loaded (plugin)) {
#ifndef GST_DISABLE_REGISTRY
if (GST_IS_REGISTRY (plugin->manager)) {
GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING,
"loading plugin %s for feature", plugin->desc.name);
if (gst_registry_load_plugin (GST_REGISTRY (plugin->manager), plugin) != GST_REGISTRY_OK)
return FALSE;
}
else
#endif /* GST_DISABLE_REGISTRY */
return FALSE;
}
return TRUE;
}
/**
* gst_plugin_feature_unload_thyself:
* @feature: the plugin feature to check
*
* Unload the given feature. This will decrease the refcount
* in the plugin and will eventually unload the plugin
*/
void
gst_plugin_feature_unload_thyself (GstPluginFeature *feature)
{
GstPluginFeatureClass *oclass;
g_return_if_fail (feature != NULL);
g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
oclass = GST_PLUGIN_FEATURE_GET_CLASS (feature);
if (oclass->unload_thyself)
oclass->unload_thyself (feature);
}
gboolean
gst_plugin_feature_type_name_filter (GstPluginFeature *feature,
GstTypeNameData *data)
{
return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
(data->name == NULL || !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));
}
/**
* gst_plugin_feature_set_rank:
* @feature: feature to rank
* @rank: rank value - higher number means more priority rank
*
* Specifies a rank for a plugin feature, so that autoplugging uses
* the most appropriate feature.
*/
void
gst_plugin_feature_set_rank (GstPluginFeature *feature, guint rank)
{
g_return_if_fail (feature != NULL);
g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
feature->rank = rank;
}
/**
* gst_plugin_feature_set_name:
* @feature: a feature
* @name: the name to set
*
* Sets the name of a plugin feature. The name uniquely identifies a feature
* within all features of the same type. Renaming a plugin feature is not
* allowed.
*/
void
gst_plugin_feature_set_name (GstPluginFeature *feature, const gchar *name)
{
g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
g_return_if_fail (name != NULL);
if (feature->name) {
g_return_if_fail (strcmp (feature->name, name) == 0);
} else {
feature->name = g_strdup (name);
}
}
/**
* gst_plugin_feature_get rank:
* @feature: a feature
*
* Gets the rank of a plugin feature.
*
* Returns: The rank of the feature
*/
guint
gst_plugin_feature_get_rank (GstPluginFeature *feature)
{
g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), GST_RANK_NONE);
return feature->rank;
}
/**
* gst_plugin_feature_set_name:
* @feature: a feature
*
* Gets the name of a pluginfeature.
*
* Returns: the name
*/
G_CONST_RETURN gchar *
gst_plugin_feature_get_name (GstPluginFeature *feature)
{
g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), NULL);
return feature->name;
}
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