gstreamer/gi/overrides/gstmodule.c
René Stadler acd4de381c overrides: Fix crash in add_template
templ vs. templates. Moved variable declarations to the inner scope to prevent
such a mistake.
2012-08-29 10:05:37 -07:00

204 lines
5.6 KiB
C

/* -*- Mode: C; ; c-file-style: "k&r"; c-basic-offset: 4 -*- */
/* gst-python
* Copyright (C) 2002 David I. Lehn
* Copyright (C) 2012 Thibault Saunier <thibault.saunier@collabora.com>
*
* 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 this first, before NO_IMPORT_PYGOBJECT is defined */
#include <Python.h>
#include <pygobject.h>
#include <gst/gst.h>
#include <locale.h>
#define PYGLIB_MODULE_START(symbol, modname) \
DL_EXPORT(void) init##symbol(void) \
{ \
PyObject *module; \
module = Py_InitModule(modname, symbol##_functions);
#define PYGLIB_MODULE_END }
static PyObject *
gi_gst_fraction_from_value (const GValue * value)
{
PyObject *module, *dict, *fraction_type, *args, *fraction;
gint numerator, denominator;
numerator = gst_value_get_fraction_numerator (value);
denominator = gst_value_get_fraction_denominator (value);
module = PyImport_ImportModule ("gi.repository.Gst");
dict = PyModule_GetDict (module);
/* For some reson we need this intermediary step */
module = PyMapping_GetItemString (dict, "_overrides_module");
dict = PyModule_GetDict (module);
fraction_type = PyMapping_GetItemString (dict, "Fraction");
args = Py_BuildValue ("(ii)", numerator, denominator);
fraction = PyObject_Call (fraction_type, args, NULL);
Py_DECREF (args);
Py_DECREF (fraction_type);
Py_DECREF (module);
return fraction;
}
static int
gi_gst_fraction_to_value (GValue * value, PyObject * object)
{
PyObject *numerator, *denominator;
numerator = PyObject_GetAttrString (object, "num");
if (numerator == NULL)
goto fail;
denominator = PyObject_GetAttrString (object, "denom");
if (denominator == NULL)
goto fail;
gst_value_set_fraction (value,
PyLong_AsLong (numerator), PyLong_AsLong (denominator));
return 0;
fail:
return -1;
}
void
gi_gst_register_types (PyObject * d)
{
pyg_register_gtype_custom (GST_TYPE_FRACTION,
gi_gst_fraction_from_value, gi_gst_fraction_to_value);
}
static int
add_templates (gpointer gclass, PyObject * templates)
{
if (PyTuple_Check (templates)) {
gint i, len;
PyGObject *templ;
len = PyTuple_Size (templates);
if (len == 0)
return 0;
for (i = 0; i < len; i++) {
templ = (PyGObject *) PyTuple_GetItem (templates, i);
if (GST_IS_PAD_TEMPLATE (pygobject_get (templ)) == FALSE) {
PyErr_SetString (PyExc_TypeError,
"entries for __gsttemplates__ must be of type GstPadTemplate");
return -1;
}
}
for (i = 0; i < len; i++) {
templ = (PyGObject *) PyTuple_GetItem (templates, i);
gst_element_class_add_pad_template (gclass,
GST_PAD_TEMPLATE (templ->obj));
}
return 0;
}
if (GST_IS_PAD_TEMPLATE (pygobject_get (templates)) == FALSE) {
PyErr_SetString (PyExc_TypeError,
"entry for __gsttemplates__ must be of type GstPadTemplate");
return -1;
}
gst_element_class_add_pad_template (gclass,
GST_PAD_TEMPLATE (pygobject_get (templates)));
return 0;
}
static int
_pygst_element_set_metadata (gpointer gclass, PyObject * metadata)
{
const gchar *longname, *classification, *description, *author;
if (!PyTuple_Check (metadata)) {
PyErr_SetString (PyExc_TypeError, "__gstmetadata__ must be a tuple");
return -1;
}
if (PyTuple_Size (metadata) != 4) {
PyErr_SetString (PyExc_TypeError,
"__gstmetadata__ must contain 4 elements");
return -1;
}
if (!PyArg_ParseTuple (metadata, "ssss", &longname, &classification,
&description, &author)) {
PyErr_SetString (PyExc_TypeError, "__gstmetadata__ must contain 4 strings");
return -1;
}
GST_DEBUG
("setting metadata on gclass %p from __gstmetadata__, longname %s",
gclass, longname);
gst_element_class_set_metadata (gclass, longname, classification,
description, author);
return 0;
}
static int
_pygst_element_init (gpointer gclass, PyTypeObject * pyclass)
{
PyObject *templates, *metadata;
GST_DEBUG ("_pygst_element_init for gclass %p", gclass);
templates = PyDict_GetItemString (pyclass->tp_dict, "__gsttemplates__");
if (templates) {
if (add_templates (gclass, templates) != 0)
return -1;
} else {
PyErr_Clear ();
}
metadata = PyDict_GetItemString (pyclass->tp_dict, "__gstmetadata__");
if (metadata) {
if (_pygst_element_set_metadata (gclass, metadata) != 0)
return -1;
PyDict_DelItemString (pyclass->tp_dict, "__gstmetadata__");
} else {
PyErr_Clear ();
}
return 0;
}
static PyMethodDef _gi_gst_functions[] = { {0,} };
PYGLIB_MODULE_START (_gi_gst, "_gi_gst")
{
PyObject *d;
pygobject_init (3, 0, 0);
d = PyModule_GetDict (module);
gi_gst_register_types (d);
pyg_register_class_init (GST_TYPE_ELEMENT, _pygst_element_init);
}
PYGLIB_MODULE_END;