initial checkin

Original commit message from CVS:
initial checkin

1 files changed, 138 insertions, 0 deletions

diff --git a/gst/gstelementfactory.c b/gst/gstelementfactory.c
new file mode 100644
index 0000000000..c6f185f1c9
--- /dev/null
+++ b/gst/gstelementfactory.c
@@ -0,0 +1,138 @@
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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/gstelement.h>
+
+
+/* global list of registered elementfactories */
+GList* _gst_elementfactories;
+
+void _gst_elementfactory_initialize() {
+  _gst_elementfactories = NULL;
+}
+
+/**
+ * gst_elementfactory_register:
+ * @elementfactory: factory to register
+ *
+ * Adds the elementfactory to the global list, so it can be retrieved by
+ * name.
+ */
+void gst_elementfactory_register(GstElementFactory *elementfactory) {
+  g_return_if_fail(elementfactory != NULL);
+
+  _gst_elementfactories = g_list_prepend(_gst_elementfactories,elementfactory);
+}
+
+/**
+ * gst_elementfactory_find:
+ * @name: name of factory to find
+ *
+ * Search for an elementfactory of the given name.
+ *
+ * Returns: #GstElementFactory if found, NULL otherwise
+ */
+GstElementFactory *gst_elementfactory_find(gchar *name) {
+  GList *walk = _gst_elementfactories;
+  GstElementFactory *factory;
+
+  while (walk) {
+    factory = (GstElementFactory *)(walk->data);
+    if (!strcmp(name,factory->name))
+      return factory;
+    walk = g_list_next(walk);
+  }
+
+  return NULL;
+}
+
+/**
+ * gst_elementfactory_get_list:
+ *
+ * Get the global list of elementfactories.
+ *
+ * Returns: <type>GList</type> of type #GstElementFactory
+ */
+GList *gst_elementfactory_get_list() {
+  return _gst_elementfactories;
+}
+
+
+/**
+ * gst_elementfactory_new:
+ * @name: name of new elementfactory
+ * @type: GtkType of new element
+ * @details: #GstElementDetails structure with element details
+ *
+ * Create a new elementfactory capable of insantiating objects of the
+ * given type.
+ *
+ * Returns: new elementfactory
+ */
+GstElementFactory *gst_elementfactory_new(gchar *name,GtkType type,
+                                          GstElementDetails *details) {
+  GstElementFactory *factory = g_new0(GstElementFactory, 1);
+  factory->name = g_strdup(name);
+  factory->type = type;
+  factory->details = details;
+  return factory;
+}
+
+/**
+ * gst_elementfactory_create:
+ * @factory: factory to instantiate
+ * @name: name of new element
+ *
+ * Create a new element of the type defined by the given elementfactory.
+ * It wll be given the name supplied, since all elements require a name as
+ * their first argument.
+ *
+ * Returns: new #GstElement
+ */
+GstElement *gst_elementfactory_create(GstElementFactory *factory,
+                                      gchar *name) {
+  GstElement *element;
+  GstElementClass *oclass;
+
+  g_return_if_fail(factory != NULL);
+  g_return_if_fail(factory->type != 0);
+
+  // create an instance of the element
+  element = GST_ELEMENT(gtk_type_new(factory->type));
+  g_assert(element != NULL);
+
+  // attempt to set the elemenfactory class pointer if necessary
+  oclass = GST_ELEMENT_CLASS(GTK_OBJECT(element)->klass);
+  if (oclass->elementfactory == NULL)
+    oclass->elementfactory = factory;
+
+  gst_element_set_name(GST_ELEMENT(element),name);
+
+  return element;
+}
+
+GstElement *gst_elementfactory_make(gchar *factoryname,gchar *name) {
+  GstElementFactory *factory;
+  GstElement *element;
+
+  factory = gst_elementfactory_find(factoryname);
+  if (factory == NULL) return NULL;
+  element = gst_elementfactory_create(factory,name);
+  return element;
+}