gstreamer/gst/pygstobject.c

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/* -*- Mode: C; ; c-file-style: "k&r"; c-basic-offset: 4 -*- */
/* gst-python
* Copyright (C) 2002 David I. Lehn
*
* 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.
*
* Author: David I. Lehn <dlehn@users.sourceforge.net>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "pygstobject.h"
#include <locale.h>
/* include this first, before NO_IMPORT_PYGOBJECT is defined */
#include <pygobject.h>
#include <gst/gst.h>
#include <gst/gstversion.h>
/* we reuse the same string for our quark so we get the same qdata;
* it might be worth it to use our own to shake out all instances
* were GObject-only calls are being used where we should be using
* gst_object_ */
static const gchar *pygobject_wrapper_id = "PyGObject::wrapper";
static GQuark pygobject_wrapper_key = 0;
/* only use on GstObject */
void
pygstobject_sink(GObject *object)
{
g_assert (GST_IS_OBJECT (object));
if (GST_OBJECT_IS_FLOATING(object)) {
gst_object_ref(GST_OBJECT(object));
gst_object_sink(GST_OBJECT(object));
}
}
/* functions used by the code generator we can call on both
* GstObject and non-GstObject GObjects
*/
/* to be called instead of pygobject_new */
PyObject *
pygstobject_new(GObject *obj)
{
PyGObject *self = NULL;
if (!GST_IS_OBJECT (obj))
return pygobject_new (obj);
GST_DEBUG_OBJECT (obj, "wrapping GstObject");
if (!pygobject_wrapper_key)
pygobject_wrapper_key = g_quark_from_static_string(pygobject_wrapper_id);
if (obj == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
/* we already have a wrapper for this object -- return it. */
self = (PyGObject *)g_object_get_qdata(obj, pygobject_wrapper_key);
if (self != NULL) {
Py_INCREF(self);
} else {
/* create wrapper */
PyTypeObject *tp = pygobject_lookup_class(G_OBJECT_TYPE(obj));
/* need to bump type refcount if created with
pygobject_new_with_interfaces(). fixes bug #141042 */
if (tp->tp_flags & Py_TPFLAGS_HEAPTYPE)
Py_INCREF(tp);
self = PyObject_GC_New(PyGObject, tp);
if (self == NULL)
return NULL;
pyg_begin_allow_threads;
self->obj = gst_object_ref(obj);
pyg_end_allow_threads;
pygstobject_sink(self->obj);
self->inst_dict = NULL;
self->weakreflist = NULL;
self->closures = NULL;
/* save wrapper pointer so we can access it later */
Py_INCREF(self);
g_object_set_qdata_full(obj, pygobject_wrapper_key, self,
pyg_destroy_notify);
PyObject_GC_Track((PyObject *)self);
}
GST_DEBUG_OBJECT (obj, "wrapped GstObject as PyObject %p", self);
return (PyObject *)self;
}
/* to be called instead of g_object_unref */
void
pygst_object_unref(GObject *obj)
{
if (GST_IS_OBJECT (obj)) {
GST_DEBUG_OBJECT (obj, "unreffing GstObject");
gst_object_unref (obj);
} else
g_object_unref (obj);
}