gstreamer/gst/gst.override
Johan Dahlin 4c254ffe3f gst/gst.override (_wrap_gst_g_error_tp_str)
Original commit message from CVS:
* gst/gst.override (_wrap_gst_g_error_tp_str)
(_wrap_gst_g_error_tp_str): Impl.

* gst/gst-types.defs (GError): Add

* gst/Makefile.am (defs_DATA): Install defs

* codegen/*: Resync
2004-03-09 14:54:57 +00:00

790 lines
20 KiB
C

/* -*- Mode: C; ; c-file-style: "python" -*- */
/* gst-python
* Copyright (C) 2002 David I. Lehn
* Copyright (C) 2004 Johan Dahlin
*
* 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>
*/
%%
headers
#include <Python.h>
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "pygobject.h"
#include <gst/gst.h>
#include <gst/gsterror.h>
#include <gst/gstqueue.h>
#include <gst/gsttypefind.h>
typedef struct {
PyGObject *pad;
PyObject *link_function;
PyObject *event_function;
PyObject *chain_function;
PyObject *get_function;
} PyGstPadPrivate;
typedef struct {
PyObject *func, *data;
} PyGstCustomNotify;
void iterate_bin_all (GstBin *bin);
guint add_iterate_bin (GstBin *bin);
void remove_iterate_bin (guint id);
extern gboolean pygst_data_from_pyobject (PyObject *object, GstData **data);
%%
include
gstpad-handlers.override
%%
modulename gst
%%
import gobject.GObject as PyGObject_Type
%%
ignore-glob
_*
gstreamer_*init
*_get_type
*_copy
*_free
*_valist
*_private
gst_registry_*
gst_value_*
gst_tag_list_get_*
%%
override gst_buffer_get_data
static PyObject*
_wrap_gst_buffer_get_data(PyObject *self)
{
GstBuffer *buf = pyg_boxed_get(self, GstBuffer);
return PyString_FromStringAndSize(GST_BUFFER_DATA(buf),
GST_BUFFER_SIZE(buf));
}
%%
override gst_buffer_set_data kwargs
static PyObject*
_wrap_gst_buffer_set_data(PyObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = {"data", NULL};
PyObject *data;
GstBuffer *buf;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:GstBuffer:set_data", kwlist, &data))
{
return NULL;
}
if (!PyString_Check(data)) {
PyErr_SetString(PyExc_TypeError, "data should be a string");
return NULL;
}
buf = pyg_boxed_get(self, GstBuffer);
if (GST_BUFFER_FLAGS(buf) & GST_BUFFER_READONLY) {
PyErr_SetString(PyExc_TypeError, "set_data can't use a READONLY buffer");
return NULL;
}
GST_BUFFER_SIZE(buf) = PyString_Size(data);
GST_BUFFER_DATA(buf) = g_new0(char, GST_BUFFER_SIZE(buf));
memcpy(GST_BUFFER_DATA(buf),
PyString_AsString(data),
PyString_Size(data));
Py_INCREF(Py_None);
return Py_None;
}
%%
override gst_bin_iterate
static PyObject *
_wrap_gst_bin_iterate(PyGObject *self)
{
int ret;
pyg_unblock_threads();
ret = gst_bin_iterate(GST_BIN(self->obj));
pyg_block_threads();
return PyInt_FromLong(ret);
}
%%
override gst_element_set_state kwargs
static PyObject *
_wrap_gst_element_set_state(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "state", NULL };
PyObject *py_state = NULL;
GstElementState state;
gint ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:GstElement.set_state", kwlist, &py_state))
return NULL;
if (pyg_flags_get_value(GST_TYPE_ELEMENT_STATE, py_state, (gint *)&state))
return NULL;
pyg_unblock_threads();
ret = gst_element_set_state(GST_ELEMENT(self->obj), state);
pyg_block_threads();
return PyInt_FromLong(ret);
}
%%
override gst_pad_query kwargs
static PyObject *
_wrap_gst_pad_query(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "type", "format", NULL };
GstQueryType type;
GstFormat format;
gint64 value;
gboolean ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii:GstPad.query", kwlist, &type, &format))
return NULL;
value = 0;
ret = gst_pad_query(GST_PAD(self->obj), type, &format, &value);
return Py_BuildValue("(bL)", ret, value);
}
%%
override gst_element_query kwargs
static PyObject *
_wrap_gst_element_query(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "type", "format", NULL };
GstQueryType type;
GstFormat format;
gint64 value;
gboolean ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii:GstElement.query", kwlist, &type, &format))
return NULL;
value = 0;
ret = gst_element_query(GST_ELEMENT(self->obj), type, &format, &value);
return Py_BuildValue("(bL)", ret, value);
}
%%
override gst_pad_convert kwargs
static PyObject *
_wrap_gst_pad_convert(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "src_format", "src_value", "dest_format", NULL };
GstFormat src_format, dest_format;
PyObject *src_value_obj;
gint64 src_value, dest_value;
gboolean ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "iOi:GstPad.convert", kwlist, &src_format, &src_value_obj, &dest_format))
return NULL;
src_value = PyLong_AsLongLong(src_value_obj);
dest_value = 0;
ret = gst_pad_convert(GST_PAD(self->obj), src_format, src_value, &dest_format, &dest_value);
return Py_BuildValue("(bL)", ret, dest_value);
}
%%
override gst_element_convert kwargs
static PyObject *
_wrap_gst_element_convert(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "src_format", "src_value", "dest_format", NULL };
GstFormat src_format, dest_format;
PyObject *src_value_obj;
gint64 src_value, dest_value;
gboolean ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "iOi:GstElement.convert", kwlist, &src_format, &src_value_obj, &dest_format))
return NULL;
src_value = PyLong_AsLongLong(src_value_obj);
dest_value = 0;
ret = gst_element_convert(GST_ELEMENT(self->obj), src_format, src_value, &dest_format, &dest_value);
return Py_BuildValue("(bL)", ret, dest_value);
}
%%
override gst_bin_add_many args
static PyObject *
_wrap_gst_bin_add_many(PyGObject *self, PyObject *args)
{
PyGObject *element;
int i, len;
len = PyTuple_Size(args);
if (len == 0) {
PyErr_SetString(PyExc_TypeError, "GstBin.add_many requires at least one argument");
return NULL;
}
for (i = 0; i < len; i++) {
element = (PyGObject*)PyTuple_GetItem(args, i);
if (!pygobject_check(element, &PyGstElement_Type))
{
PyErr_SetString(PyExc_TypeError, "argument must be a GstElement");
return NULL;
}
}
for (i = 0; i < len; i++) {
element = (PyGObject*)PyTuple_GetItem(args, i);
gst_bin_add(GST_BIN(self->obj), GST_ELEMENT(element->obj));
}
Py_INCREF(Py_None);
return Py_None;
}
%%
override gst_element_link_many args
static PyObject *
_wrap_gst_element_link_many(PyObject *self, PyObject *args)
{
PyGObject *element, *element2;
int i, len;
len = PyTuple_Size(args);
if (len < 2)
{
PyErr_SetString(PyExc_TypeError, "gst.element_link_many requires at least two argument");
return NULL;
}
for (i = 0; i < len; i++)
{
element = (PyGObject*)PyTuple_GetItem(args, i);
if (!pygobject_check(element, &PyGstElement_Type))
{
PyErr_SetString(PyExc_TypeError, "argument must be a GstElement");
return NULL;
}
}
/* Mimic the real gst_element_link_many */
element = (PyGObject*)PyTuple_GetItem(args, 0);
element2 = (PyGObject*)PyTuple_GetItem(args, 1);
i = 2;
while (1) {
if (!gst_element_link(GST_ELEMENT(element->obj), GST_ELEMENT(element2->obj)))
return PyInt_FromLong(0);
if (i >= len)
break;
element = element2;
element2 = (PyGObject*)PyTuple_GetItem(args, i);
i++;
}
return PyInt_FromLong(1);
}
%%
override-slot GstBuffer.tp_getattr
PyObject *
_wrap_gst_buffer_tp_getattr(PyGObject *self, char *attr)
{
if (!strcmp(attr, "type"))
return pyg_type_wrapper_new(GST_DATA_TYPE(self->obj));
else if (!strcmp(attr, "flags"))
return PyInt_FromLong(GST_DATA_FLAGS(self->obj));
return Py_FindMethod(_PyGstBuffer_methods, (PyObject*)self, attr);
}
%%
override GstPad.get_negotiated_caps
static PyObject *
_wrap_gst_pad_get_negotiated_caps(PyGObject *self)
{
const GstCaps *ret;
ret = gst_pad_get_negotiated_caps(GST_PAD(self->obj));
/* pyg_boxed_new handles NULL checking */
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_buffer_new kwargs
static int
_wrap_gst_buffer_new(PyGBoxed *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "data", "buffer_size", NULL };
char *data = NULL;
int size;
int buf_size = 4096;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|z#s:GstBuffer.__init__", kwlist,
&data, &size, &buf_size))
return -1;
self->gtype = GST_TYPE_BUFFER;
self->free_on_dealloc = FALSE;
self->boxed = gst_buffer_new(); //_and_alloc(buf_size);
if (!self->boxed) {
PyErr_SetString(PyExc_RuntimeError, "could not create GstBuffer object");
return -1;
}
GST_BUFFER_SIZE (self->boxed) = size;
GST_BUFFER_DATA (self->boxed) = data;
// if (data)
// memcpy(GST_BUFFER_DATA (self->boxed), data, size);
// gst_buffer_set_data (self->boxed, data, size);
// gst_buffer_ref (GST_BUFFER (self->boxed));
return 0;
}
%%
define GstTagList.keys noargs
void
tag_foreach_func_dict (const GstTagList *list,
const gchar *tag,
PyObject *dict)
{
int count;
guint i;
const GValue *gvalue;
PyObject *value;
gchar *key;
count = gst_tag_list_get_tag_size(GST_TAG_LIST(list), tag);
for (i = 0; i < count; i++) {
gvalue = gst_tag_list_get_value_index(GST_TAG_LIST(list), tag, i);
value = pyg_value_as_pyobject(gvalue, TRUE);
key = g_strdup (tag);
PyDict_SetItemString(dict, key, value);
g_free (key);
Py_DECREF(value);
}
}
void
tag_foreach_func_list (const GstTagList *list,
const gchar *tag,
PyObject *py_list)
{
int count;
count = gst_tag_list_get_tag_size(GST_TAG_LIST(list), tag);
if (count == 0)
PyErr_SetString(PyExc_KeyError, tag);
else if (count == 1)
PyList_Append(py_list, PyString_FromString(tag));
else if (count > 1)
PyErr_SetString(PyExc_TypeError, "lists are currently unspported");
}
static PyObject*
_wrap_gst_tag_list_keys(PyGObject *self)
{
PyObject *dict;
dict = PyList_New(0);
gst_tag_list_foreach(GST_TAG_LIST(self->obj),
(GstTagForeachFunc)tag_foreach_func_list,
(gpointer)dict);
return dict;
}
%%
override-slot GstTagList.tp_as_mapping
static int
_wrap_gst_tag_list_length(PyGObject *self)
{
return gst_structure_n_fields((GstStructure*)self->obj);
}
static PyObject *
_wrap_gst_tag_list_subscript(PyGObject *self, PyObject *py_key)
{
PyObject *v = NULL;
char *key = PyString_AsString(py_key);
int count = gst_tag_list_get_tag_size(GST_TAG_LIST(self->obj), key);
if (count == 0) {
PyErr_SetObject(PyExc_KeyError, py_key);
} else if (count == 1) {
const GValue *gvalue;
gvalue = gst_tag_list_get_value_index(GST_TAG_LIST(self->obj), key, 0);
v = pyg_value_as_pyobject(gvalue, TRUE);
} else {
PyErr_SetString(PyExc_TypeError, "lists are currently unspported");
}
if (v != NULL)
Py_INCREF(v);
return v;
}
static PySequenceMethods _wrap_gst_tag_list_tp_as_mapping = {
(inquiry)_wrap_gst_tag_list_length, /* mp_length */
(binaryfunc)_wrap_gst_tag_list_subscript, /* mp_subscript */
NULL,
};
%%
define GstTagList.has_key args
static PyObject*
_wrap_gst_tag_list_has_key(PyGObject *self, PyObject *args)
{
gchar *key;
const GValue *gvalue;
if (!PyArg_ParseTuple(args, "s:GstTagList.keys", &key))
return NULL;
gvalue = gst_tag_list_get_value_index(GST_TAG_LIST(self->obj), key, 0);
return PyInt_FromLong(gvalue != NULL);
}
%%
define GstTagList.get
static PyObject *
_wrap_gst_tag_list_get(PyGObject *self, PyObject *args)
{
char *key;
PyObject *failobj = Py_None;
PyObject *val = NULL;
const GValue *gvalue;
if (!PyArg_ParseTuple(args, "s|O:GstTagList.get", &key, &failobj))
return NULL;
gvalue = gst_tag_list_get_value_index(GST_TAG_LIST(self->obj), key, 0);
if (gvalue != NULL) {
int count = gst_tag_list_get_tag_size(GST_TAG_LIST(self->obj), key);
if (count == 0) {
PyErr_SetString(PyExc_KeyError, key);
} else if (count == 1) {
gvalue = gst_tag_list_get_value_index(GST_TAG_LIST(self->obj), key, 0);
val = pyg_value_as_pyobject(gvalue, TRUE);
} else {
PyErr_SetString(PyExc_TypeError, "lists are currently unspported");
}
}
if (val == NULL)
val = failobj;
Py_INCREF(val);
return val;
}
static PyGstPadPrivate*
pad_private(GstPad *pad)
{
return (PyGstPadPrivate*)gst_pad_get_element_private(pad);
}
static PyGstPadPrivate*
py_pad_private(PyGObject *pad)
{
PyGstPadPrivate *private;
GstPad *gpad;
gpad = (GstPad*)pygobject_get(pad);
private = (PyGstPadPrivate*)gst_pad_get_element_private(gpad);
if (private == NULL) {
/* FIXME need to free this somewhere */
private = g_new0(PyGstPadPrivate, 1);
Py_INCREF(pad);
private->pad = pad;
gst_pad_set_element_private(gpad, private);
}
return private;
}
%%
override gst_structure_new kwargs
static int
_wrap_gst_structure_new(PyGBoxed *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "name", NULL };
char *name;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:GstStructure.__init__", kwlist, &name))
return -1;
self->gtype = GST_TYPE_STRUCTURE;
self->free_on_dealloc = FALSE;
self->boxed = gst_structure_new(name, NULL);
if (!self->boxed) {
PyErr_SetString(PyExc_RuntimeError, "could not create GstStructure object");
return -1;
}
self->free_on_dealloc = TRUE;
return 0;
}
%%
override gst_structure_set_value kwargs
static PyObject *
_wrap_gst_structure_set_value(PyObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "field", "value", NULL };
char *field;
PyObject *py_value = NULL;
GValue value = { 0 };
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"sO:GstStructure.set_value",
kwlist, &field, &py_value))
return NULL;
g_value_init(&value, G_TYPE_STRING);
if (pyg_value_from_pyobject(&value, py_value) != 0) {
return NULL;
}
gst_structure_set_value(pyg_boxed_get(self, GstStructure), field, &value);
Py_INCREF(Py_None);
return Py_None;
}
%%
override gst_structure_foreach kwargs
static gboolean
pygst_structure_foreach_marshal(GQuark field_id,
GValue *value,
gpointer user_data)
{
PyGstCustomNotify *cunote = user_data;
PyObject *py_field, *py_value, *retobj;
gboolean retval = TRUE;
g_assert(cunote->func);
pyg_block_threads();
//py_model = pygobject_new((GObject *)model);
//py_path = pygtk_tree_path_to_pyobject(path);
//py_iter = pyg_boxed_new(GTK_TYPE_TREE_ITER, iter, TRUE, TRUE);
py_field = Py_BuildValue("s", g_quark_to_string(field_id));
py_value = pyg_value_as_pyobject(value, FALSE);
if (cunote->data)
retobj = PyEval_CallFunction(cunote->func, "(NNO)",
py_field, py_value,
cunote->data);
else
retobj = PyEval_CallFunction(cunote->func, "(NN)",
py_field, py_value);
if (PyErr_Occurred () || (retobj == NULL) || (retobj == Py_None)) {
PyErr_Print ();
retval = FALSE;
} else if (retobj != Py_None) {
retval = PyInt_AsLong(retobj);
}
Py_XDECREF(retobj);
pyg_unblock_threads();
return retval;
}
static PyObject *
_wrap_gst_structure_foreach (PyGObject *self,
PyObject *args,
PyObject *kwargs)
{
static char *kwlist[] = { "foreach_function", "args", NULL };
PyObject *pyfunc, *pyarg = NULL;
PyGstCustomNotify cunote;
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"O|O:GstStructure.foreach",
kwlist,
&pyfunc, &pyarg)) {
return NULL;
}
if (!PyCallable_Check(pyfunc)) {
PyErr_SetString(PyExc_TypeError, "foreach_function not callable");
return NULL;
}
cunote.func = pyfunc;
cunote.data = pyarg;
gst_structure_foreach(pyg_boxed_get(self, GstStructure),
pygst_structure_foreach_marshal,
&cunote);
Py_INCREF(Py_None);
return Py_None;
}
%%
override gst_tag_list_foreach kwargs
static gboolean
pygst_tag_list_foreach_marshal(GstTagList *list,
const gchar *tag,
gpointer user_data)
{
PyGstCustomNotify *cunote = user_data;
PyObject *py_list;
PyObject *py_key, *retobj;
gboolean retval = TRUE;
g_assert(cunote->func);
pyg_block_threads();
py_list = pyg_boxed_new(GST_TYPE_TAG_LIST, list, TRUE, TRUE);
py_key = Py_BuildValue("s", tag);
if (cunote->data)
retobj = PyEval_CallFunction(cunote->func, "(NNO)",
py_list,
py_key,
cunote->data);
else
retobj = PyEval_CallFunction(cunote->func, "(NN)",
py_list,
py_key);
if (PyErr_Occurred () || (retobj == NULL) || (retobj == Py_None)) {
PyErr_Print ();
retval = FALSE;
} else if (retobj != Py_None) {
retval = PyInt_AsLong(retobj);
}
Py_XDECREF(retobj);
pyg_unblock_threads();
return retval;
}
static PyObject *
_wrap_gst_tag_list_foreach (PyGObject *self,
PyObject *args,
PyObject *kwargs)
{
static char *kwlist[] = { "foreach_function", "args", NULL };
PyObject *pyfunc, *pyarg = NULL;
PyGstCustomNotify cunote;
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"O|O:GstTagList.foreach",
kwlist, &pyfunc, &pyarg))
return NULL;
if (!PyCallable_Check(pyfunc)) {
PyErr_SetString(PyExc_TypeError, "foreach_function not callable");
return NULL;
}
cunote.func = pyfunc;
cunote.data = pyarg;
gst_tag_list_foreach(pyg_boxed_get(self, GstTagList),
(GstTagForeachFunc)pygst_tag_list_foreach_marshal,
&cunote);
Py_INCREF(Py_None);
return Py_None;
}
%%
override gst_tag_list_get_value_index kwargs
static PyObject *
_wrap_gst_tag_list_get_value_index (PyGObject *self,
PyObject *args,
PyObject *kwargs)
{
static char *kwlist[] = { "tag", "index", NULL };
char *tag;
int index;
const GValue *gvalue;
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"si:GstTagList.get_value_index",
kwlist, &tag, &index))
return NULL;
gvalue = gst_tag_list_get_value_index(pyg_boxed_get(self, GstTagList),
tag,
index);
return pyg_value_as_pyobject(gvalue, FALSE);
}
%%
override gst_pad_get_negotiated_caps noargs
static PyObject *
_wrap_gst_pad_get_negotiated_caps(PyGObject *self)
{
GstCaps *ret = (GstCaps*)gst_pad_get_negotiated_caps(GST_PAD(self->obj));
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_pad_get_pad_template_caps noargs
static PyObject *
_wrap_gst_pad_get_pad_template_caps(PyGObject *self)
{
GstCaps *ret = (GstCaps*)gst_pad_get_pad_template_caps(GST_PAD(self->obj));
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_pad_template_get_caps noargs
static PyObject *
_wrap_gst_pad_template_get_caps(PyGObject *self)
{
GstCaps *ret = (GstCaps*)gst_pad_template_get_caps(GST_PAD_TEMPLATE(self->obj));
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_type_fidn_factory_get_caps noargs
static PyObject *
_wrap_gst_type_find_factory_get_caps(PyGObject *self)
{
GstCaps *ret = (GstCaps*)gst_type_find_factory_get_caps(GST_TYPE_FIND_FACTORY(self->obj));
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_pad_template_get_caps_ny_name kwargs
static PyObject *
_wrap_gst_pad_template_get_caps_by_name(PyGObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "name", NULL };
char *name;
GstCaps *ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:GstPadTemplate.get_caps_by_name", kwlist, &name))
return NULL;
ret = (GstCaps*)gst_pad_template_get_caps_by_name(GST_PAD_TEMPLATE(self->obj), name);
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override gst_type_find_factory_get_caps noargs
static PyObject *
_wrap_gst_type_find_factory_get_caps(PyGObject *self)
{
GstCaps *ret = (GstCaps*)gst_type_find_factory_get_caps(GST_TYPE_FIND_FACTORY(self->obj));
return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
}
%%
override-attr GError.domain
static PyObject *
_wrap_gst_g_error__get_domain(PyGObject *self, void *closure)
{
return PyString_FromString(g_quark_to_string(((GError*)self->obj)->domain));
}
%%
override-slot GError.tp_str
static PyObject *
_wrap_gst_g_error_tp_str(PyGObject *self)
{
GError *error = (GError*)self->obj;
return PyString_FromString(gst_error_get_message (error->domain,
error->code));
}