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/* GStreamer
* Copyright (C) 2001 RidgeRun (http://www.ridgerun.com/)
* Written by Erik Walthinsen <omega@ridgerun.com>
*
* gstindexfactory.c: Index for mappings and other data
*
* 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.
*/
/**
* SECTION:gstindexfactory
* @short_description: Create GstIndexes from a factory
* @see_also: #GstIndex
*
* GstIndexFactory is used to dynamically create GstIndex implementations.
*/
#include "gst_private.h"
#include "gstinfo.h"
#include "gstindex.h"
#include "gstindexfactory.h"
#include "gstmarshal.h"
#include "gstregistry.h"
static void gst_index_factory_class_init (GstIndexFactoryClass * klass);
static void gst_index_factory_finalize (GObject * object);
static GstPluginFeatureClass *factory_parent_class = NULL;
/* static guint gst_index_factory_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_index_factory_get_type (void)
{
static GType indexfactory_type = 0;
if (G_UNLIKELY (indexfactory_type == 0)) {
static const GTypeInfo indexfactory_info = {
sizeof (GstIndexFactoryClass),
NULL,
NULL,
(GClassInitFunc) gst_index_factory_class_init,
NULL,
NULL,
sizeof (GstIndexFactory),
0,
NULL,
NULL
};
indexfactory_type = g_type_register_static (GST_TYPE_PLUGIN_FEATURE,
"GstIndexFactory", &indexfactory_info, 0);
}
return indexfactory_type;
}
static void
gst_index_factory_class_init (GstIndexFactoryClass * klass)
{
GObjectClass *gobject_class;
GstObjectClass *gstobject_class;
GstPluginFeatureClass *gstpluginfeature_class;
gobject_class = (GObjectClass *) klass;
gstobject_class = (GstObjectClass *) klass;
gstpluginfeature_class = (GstPluginFeatureClass *) klass;
factory_parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_index_factory_finalize);
}
static void
gst_index_factory_finalize (GObject * object)
{
GstIndexFactory *factory = GST_INDEX_FACTORY (object);
g_free (factory->longdesc);
G_OBJECT_CLASS (factory_parent_class)->finalize (object);
}
/**
* gst_index_factory_new:
* @name: name of indexfactory to create
* @longdesc: long description of indexfactory to create
* @type: the GType of the GstIndex element of this factory
*
* Create a new indexfactory with the given parameters
*
* Returns: a new #GstIndexFactory.
*/
GstIndexFactory *
gst_index_factory_new (const gchar * name, const gchar * longdesc, GType type)
{
GstIndexFactory *factory;
g_return_val_if_fail (name != NULL, NULL);
factory = GST_INDEX_FACTORY (g_object_new (GST_TYPE_INDEX_FACTORY, NULL));
GST_PLUGIN_FEATURE_NAME (factory) = g_strdup (name);
if (factory->longdesc)
g_free (factory->longdesc);
factory->longdesc = g_strdup (longdesc);
factory->type = type;
return factory;
}
/**
* gst_index_factory_destroy:
* @factory: factory to destroy
*
* Removes the index from the global list.
*/
void
gst_index_factory_destroy (GstIndexFactory * factory)
{
g_return_if_fail (factory != NULL);
/* we don't free the struct bacause someone might have a handle to it.. */
}
/**
* gst_index_factory_find:
* @name: name of indexfactory to find
*
* Search for an indexfactory of the given name.
*
* Returns: #GstIndexFactory if found, NULL otherwise
*/
GstIndexFactory *
gst_index_factory_find (const gchar * name)
{
GstPluginFeature *feature;
g_return_val_if_fail (name != NULL, NULL);
GST_DEBUG ("gstindex: find \"%s\"", name);
feature = gst_registry_find_feature (gst_registry_get_default (), name,
GST_TYPE_INDEX_FACTORY);
if (feature)
return GST_INDEX_FACTORY (feature);
return NULL;
}
/**
* gst_index_factory_create:
* @factory: the factory used to create the instance
*
* Create a new #GstIndex instance from the
* given indexfactory.
*
* Returns: A new #GstIndex instance.
*/
GstIndex *
gst_index_factory_create (GstIndexFactory * factory)
{
GstIndexFactory *newfactory;
GstIndex *new = NULL;
g_return_val_if_fail (factory != NULL, NULL);
newfactory =
GST_INDEX_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (newfactory == NULL)
return NULL;
new = GST_INDEX (g_object_new (newfactory->type, NULL));
gst_object_unref (newfactory);
return new;
}
/**
* gst_index_factory_make:
* @name: the name of the factory used to create the instance
*
* Create a new #GstIndex instance from the
* indexfactory with the given name.
*
* Returns: A new #GstIndex instance.
*/
GstIndex *
gst_index_factory_make (const gchar * name)
{
GstIndexFactory *factory;
GstIndex *index;
g_return_val_if_fail (name != NULL, NULL);
factory = gst_index_factory_find (name);
if (factory == NULL)
goto no_factory;
index = gst_index_factory_create (factory);
if (index == NULL)
goto create_failed;
gst_object_unref (factory);
return index;
/* ERRORS */
no_factory:
{
GST_INFO ("no such index factory \"%s\"!", name);
return NULL;
}
create_failed:
{
GST_INFO_OBJECT (factory, "couldn't create instance!");
gst_object_unref (factory);
return NULL;
}
}
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