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212 lines
5 KiB
C
212 lines
5 KiB
C
/* GStreamer
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* Copyright (C) 2001 RidgeRun (http://www.ridgerun.com/)
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* Written by Erik Walthinsen <omega@ridgerun.com>
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*
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* gstindexfactory.c: Index for mappings and other data
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstindexfactory
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* @short_description: Create GstIndexes from a factory
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* @see_also: #GstIndex
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*
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* GstIndexFactory is used to dynamically create GstIndex implementations.
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*/
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#include "gst_private.h"
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#include "gstinfo.h"
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#include "gstindex.h"
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#include "gstindexfactory.h"
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#include "gstmarshal.h"
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#include "gstregistry.h"
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static void gst_index_factory_finalize (GObject * object);
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/* static guint gst_index_factory_signals[LAST_SIGNAL] = { 0 }; */
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#define gst_index_factory_parent_class parent_class
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G_DEFINE_TYPE (GstIndexFactory, gst_index_factory, GST_TYPE_PLUGIN_FEATURE);
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static void
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gst_index_factory_class_init (GstIndexFactoryClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->finalize = gst_index_factory_finalize;
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}
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static void
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gst_index_factory_init (GstIndexFactory * factory)
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{
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}
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static void
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gst_index_factory_finalize (GObject * object)
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{
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GstIndexFactory *factory = GST_INDEX_FACTORY (object);
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g_free (factory->longdesc);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/**
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* gst_index_factory_new:
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* @name: name of indexfactory to create
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* @longdesc: long description of indexfactory to create
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* @type: the GType of the GstIndex element of this factory
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*
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* Create a new indexfactory with the given parameters
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*
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* Returns: (transfer full): a new #GstIndexFactory.
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*/
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GstIndexFactory *
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gst_index_factory_new (const gchar * name, const gchar * longdesc, GType type)
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{
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GstIndexFactory *factory;
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g_return_val_if_fail (name != NULL, NULL);
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factory =
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GST_INDEX_FACTORY (g_object_new (GST_TYPE_INDEX_FACTORY, "name", name,
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NULL));
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if (factory->longdesc)
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g_free (factory->longdesc);
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factory->longdesc = g_strdup (longdesc);
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factory->type = type;
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return factory;
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}
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/**
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* gst_index_factory_destroy:
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* @factory: factory to destroy
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*
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* Removes the index from the global list.
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*/
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void
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gst_index_factory_destroy (GstIndexFactory * factory)
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{
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g_return_if_fail (factory != NULL);
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/* we don't free the struct bacause someone might have a handle to it.. */
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/* FIXME: gst_index_factory_destroy */
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}
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/**
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* gst_index_factory_find:
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* @name: name of indexfactory to find
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*
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* Search for an indexfactory of the given name.
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*
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* Returns: (transfer full): #GstIndexFactory if found, NULL otherwise
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*/
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GstIndexFactory *
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gst_index_factory_find (const gchar * name)
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{
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GstPluginFeature *feature;
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g_return_val_if_fail (name != NULL, NULL);
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GST_DEBUG ("gstindex: find \"%s\"", name);
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feature = gst_registry_find_feature (gst_registry_get_default (), name,
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GST_TYPE_INDEX_FACTORY);
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if (feature)
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return GST_INDEX_FACTORY (feature);
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return NULL;
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}
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/**
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* gst_index_factory_create:
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* @factory: the factory used to create the instance
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*
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* Create a new #GstIndex instance from the
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* given indexfactory.
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*
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* Returns: (transfer full): a new #GstIndex instance.
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*/
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GstIndex *
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gst_index_factory_create (GstIndexFactory * factory)
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{
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GstIndexFactory *newfactory;
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GstIndex *new = NULL;
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g_return_val_if_fail (factory != NULL, NULL);
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newfactory =
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GST_INDEX_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
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(factory)));
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if (newfactory == NULL)
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return NULL;
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new = GST_INDEX (g_object_newv (newfactory->type, 0, NULL));
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gst_object_unref (newfactory);
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return new;
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}
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/**
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* gst_index_factory_make:
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* @name: the name of the factory used to create the instance
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*
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* Create a new #GstIndex instance from the
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* indexfactory with the given name.
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*
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* Returns: (transfer full): a new #GstIndex instance.
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*/
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GstIndex *
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gst_index_factory_make (const gchar * name)
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{
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GstIndexFactory *factory;
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GstIndex *index;
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g_return_val_if_fail (name != NULL, NULL);
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factory = gst_index_factory_find (name);
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if (factory == NULL)
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goto no_factory;
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index = gst_index_factory_create (factory);
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if (index == NULL)
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goto create_failed;
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gst_object_unref (factory);
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return index;
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/* ERRORS */
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no_factory:
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{
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GST_INFO ("no such index factory \"%s\"!", name);
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return NULL;
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}
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create_failed:
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{
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GST_INFO_OBJECT (factory, "couldn't create instance!");
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gst_object_unref (factory);
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return NULL;
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}
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}
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