gstreamer/gst/gstautoplug.c
Wim Taymans 55006f6367 Merged the AUTOPLUG2 branch
Original commit message from CVS:
Merged the AUTOPLUG2 branch
2001-03-07 21:52:56 +00:00

291 lines
7 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstautoplug.c: Autoplugging of pipelines
*
* 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.
*/
//#define GST_DEBUG_ENABLED
#include "gst_private.h"
#include "gstautoplug.h"
#include "gstplugin.h"
GList* _gst_autoplugfactories;
enum {
NEW_OBJECT,
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_autoplug_class_init (GstAutoplugClass *klass);
static void gst_autoplug_init (GstAutoplug *autoplug);
static GstObjectClass *parent_class = NULL;
static guint gst_autoplug_signals[LAST_SIGNAL] = { 0 };
GtkType gst_autoplug_get_type(void)
{
static GtkType autoplug_type = 0;
if (!autoplug_type) {
static const GtkTypeInfo autoplug_info = {
"GstAutoplug",
sizeof(GstAutoplug),
sizeof(GstAutoplugClass),
(GtkClassInitFunc)gst_autoplug_class_init,
(GtkObjectInitFunc)gst_autoplug_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
autoplug_type = gtk_type_unique (GST_TYPE_OBJECT, &autoplug_info);
}
return autoplug_type;
}
static void
gst_autoplug_class_init(GstAutoplugClass *klass)
{
GtkObjectClass *gtkobject_class;
GstObjectClass *gstobject_class;
gtkobject_class = (GtkObjectClass*) klass;
gstobject_class = (GstObjectClass*) klass;
parent_class = gtk_type_class(GST_TYPE_OBJECT);
gst_autoplug_signals[NEW_OBJECT] =
gtk_signal_new ("new_object", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstAutoplugClass, new_object),
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1,
GST_TYPE_OBJECT);
gtk_object_class_add_signals (gtkobject_class, gst_autoplug_signals, LAST_SIGNAL);
}
static void gst_autoplug_init(GstAutoplug *autoplug)
{
}
void
_gst_autoplug_initialize (void)
{
_gst_autoplugfactories = NULL;
}
void
gst_autoplug_signal_new_object (GstAutoplug *autoplug, GstObject *object)
{
gtk_signal_emit (GTK_OBJECT (autoplug), gst_autoplug_signals[NEW_OBJECT], object);
}
GstElement*
gst_autoplug_to_caps (GstAutoplug *autoplug, GList *srccaps, GList *sinkcaps, ...)
{
GstAutoplugClass *oclass;
GstElement *element = NULL;
va_list args;
va_start (args, sinkcaps);
oclass = GST_AUTOPLUG_CLASS (GTK_OBJECT (autoplug)->klass);
if (oclass->autoplug_to_caps)
element = (oclass->autoplug_to_caps) (autoplug, srccaps, sinkcaps, args);
va_end (args);
return element;
}
GstElement*
gst_autoplug_to_renderers (GstAutoplug *autoplug, GList *srccaps, GstElement *target, ...)
{
GstAutoplugClass *oclass;
GstElement *element = NULL;
va_list args;
va_start (args, target);
oclass = GST_AUTOPLUG_CLASS (GTK_OBJECT (autoplug)->klass);
if (oclass->autoplug_to_renderers)
element = (oclass->autoplug_to_renderers) (autoplug, srccaps, target, args);
va_end (args);
return element;
}
/**
* gst_autoplugfactory_new:
* @name: name of autoplugfactory to create
* @longdesc: long description of autoplugfactory to create
* @type: the gtk type of the GstAutoplug element of this factory
*
* Create a new autoplugfactory with the given parameters
*
* Returns: a new #GstAutoplugFactory.
*/
GstAutoplugFactory*
gst_autoplugfactory_new (const gchar *name, const gchar *longdesc, GtkType type)
{
GstAutoplugFactory *factory;
g_return_val_if_fail(name != NULL, NULL);
factory = g_new0(GstAutoplugFactory, 1);
factory->name = g_strdup(name);
factory->longdesc = g_strdup (longdesc);
factory->type = type;
_gst_autoplugfactories = g_list_prepend (_gst_autoplugfactories, factory);
return factory;
}
/**
* gst_autoplugfactory_destroy:
* @autoplug: factory to destroy
*
* Removes the autoplug from the global list.
*/
void
gst_autoplugfactory_destroy (GstAutoplugFactory *autoplug)
{
g_return_if_fail (autoplug != NULL);
_gst_autoplugfactories = g_list_remove (_gst_autoplugfactories, autoplug);
// we don't free the struct bacause someone might have a handle to it..
}
/**
* gst_autoplug_find:
* @name: name of autoplugger to find
*
* Search for an autoplugger of the given name.
*
* Returns: #GstAutoplug if found, NULL otherwise
*/
GstAutoplugFactory*
gst_autoplugfactory_find (const gchar *name)
{
GList *walk;
GstAutoplugFactory *factory;
g_return_val_if_fail(name != NULL, NULL);
GST_DEBUG (0,"gstautoplug: find \"%s\"\n", name);
walk = _gst_autoplugfactories;
while (walk) {
factory = (GstAutoplugFactory *)(walk->data);
if (!strcmp (name, factory->name))
return factory;
walk = g_list_next (walk);
}
return NULL;
}
/**
* gst_autoplugfactory_get_list:
*
* Get the global list of elementfactories.
*
* Returns: GList of type #GstElementFactory
*/
GList*
gst_autoplugfactory_get_list (void)
{
return _gst_autoplugfactories;
}
GstAutoplug*
gst_autoplugfactory_create (GstAutoplugFactory *factory)
{
GstAutoplug *new = NULL;
g_return_val_if_fail (factory != NULL, NULL);
if (factory->type == 0){
factory = gst_plugin_load_autoplugfactory (factory->name);
}
g_return_val_if_fail (factory != NULL, NULL);
g_return_val_if_fail (factory->type != 0, NULL);
new = GST_AUTOPLUG (gtk_type_new (factory->type));
return new;
}
GstAutoplug*
gst_autoplugfactory_make (const gchar *name)
{
GstAutoplugFactory *factory;
g_return_val_if_fail (name != NULL, NULL);
factory = gst_autoplugfactory_find (name);
if (factory == NULL)
return NULL;
return gst_autoplugfactory_create (factory);;
}
xmlNodePtr
gst_autoplugfactory_save_thyself (GstAutoplugFactory *factory, xmlNodePtr parent)
{
g_return_val_if_fail(factory != NULL, NULL);
xmlNewChild(parent,NULL,"name",factory->name);
xmlNewChild(parent,NULL,"longdesc", factory->longdesc);
return parent;
}
GstAutoplugFactory*
gst_autoplugfactory_load_thyself (xmlNodePtr parent)
{
GstAutoplugFactory *factory = g_new0(GstAutoplugFactory, 1);
xmlNodePtr children = parent->xmlChildrenNode;
while (children) {
if (!strcmp(children->name, "name")) {
factory->name = xmlNodeGetContent(children);
}
if (!strcmp(children->name, "longdesc")) {
factory->longdesc = xmlNodeGetContent(children);
}
children = children->next;
}
_gst_autoplugfactories = g_list_prepend (_gst_autoplugfactories, factory);
return factory;
}