gstreamer/gst/gst.override

/* -*- Mode: C; c-basic-offset: 4 -*- */
/* 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
/* define this for all source files that don't run init_pygobject()
 * before including pygobject.h */
#define NO_IMPORT_PYGOBJECT

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "common.h"

#include <gst/gst.h>
#include <gst/gsterror.h>
#include <gst/gstqueue.h>
#include <gst/gsttypefind.h>
#include <gst/gsttag.h>
#include <gst/gsttaginterface.h>
#include <gst/gstprobe.h>

#include "pygstvalue.h"
#include "pygstminiobject.h"

/* These headers have been included directly to get around multiple 
 * GetAttrString calls */
#include <compile.h>
#include <frameobject.h>

PyObject *PyGstExc_LinkError = NULL;

GSList *mainloops = NULL;
void
_pygst_main_quit(void)
{
    if (!mainloops)
           g_error ("Quit more loops than there are");
    else {
       GMainLoop *loop = mainloops->data;

       mainloops = g_slist_delete_link (mainloops, mainloops);
       g_main_loop_quit (loop);
       g_main_loop_unref (loop);
    }
 }

void
_pygst_main(void)
{
    GMainLoop *loop;

    loop = g_main_loop_new (NULL, FALSE);
    mainloops = g_slist_prepend (mainloops, loop);

    g_main_loop_run (loop);
}

/* This function checks if a former Python code threw an exception and if
 * so, transforms this exception into an error on the given GstElement.
 * This allows code run on the element to just raise an exception instead of
 * returning GStreamer specific return values.
 * The exception is cleared afterwards.
 */
gboolean
_pygst_element_check_error (GstElement *element)
{
  PyObject *type, *value, *traceback, *lineno, *msg, *typemsg;
  PyFrameObject *frame;

  if (!PyErr_Occurred())
	  return FALSE;

  PyErr_Fetch (&type, &value, &traceback);
  if (traceback) {
    frame = (PyFrameObject *) PyObject_GetAttrString (traceback, "tb_frame");
    lineno = PyObject_GetAttrString (traceback, "tb_lineno");
  } else {
    frame = NULL;
    lineno = NULL;
  }
  msg = PyObject_Str (value);
  typemsg = PyObject_Str (type);
  if (msg && PyString_Check (msg)) {
	    gst_element_message_full (element, GST_MESSAGE_ERROR,
                    GST_LIBRARY_ERROR,
		    GST_LIBRARY_ERROR_FAILED,
		    g_strdup (PyString_AsString (msg)), 
		    typemsg ? g_strconcat (PyString_AsString (typemsg), 
			    ": ", PyString_AsString (msg), NULL)
		    : g_strdup (PyString_AsString (msg)),
		    frame ? PyString_AsString(frame->f_code->co_filename) : "???",
		    frame ? PyString_AsString(frame->f_code->co_name) : "???",
		    lineno ? PyInt_AsLong (lineno) : 0);
  } else {
	gst_element_message_full (element, GST_MESSAGE_ERROR,
                    GST_LIBRARY_ERROR,
		    GST_LIBRARY_ERROR_TOO_LAZY,
		    NULL, NULL,
		    frame ? PyString_AsString(frame->f_code->co_filename) : "???",
		    frame ? PyString_AsString(frame->f_code->co_name) : "???",
		    lineno ? PyInt_AsLong (lineno) : 0);
  }

  PyErr_Clear ();
  Py_XDECREF (frame);
  Py_XDECREF (lineno);
  Py_DECREF (msg);
  Py_DECREF (typemsg);

  return TRUE;
}

#ifdef pyg_register_class_init
PyTypeObject PyGstPadTemplate_Type;
static int
add_templates (gpointer gclass, PyObject *templates)
{
  gint i, len;
  PyGObject *templ;
  
  if (pygobject_check(templates, &PyGstPadTemplate_Type)) {
    gst_element_class_add_pad_template (gclass, GST_PAD_TEMPLATE (pygobject_get (templates)));
    return 0;
  }
  
  if (!PyTuple_Check(templates)) {
    PyErr_SetString(PyExc_TypeError, "__gsttemplates__ attribute neither a tuple nor a GstPadTemplate!");
    return -1;
  }
  len = PyTuple_Size(templates);
  if (len == 0)
    return 0;
  
  for (i = 0; i < len; i++) {
    templ = (PyGObject*) PyTuple_GetItem(templates, i);
    if (!pygobject_check(templ, &PyGstPadTemplate_Type)) {
      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;
}

static int
_pygst_element_set_details (gpointer gclass, PyObject *details)
{
  GstElementDetails gstdetails = { 0, };
  
  if (!PyTuple_Check (details)) {
    PyErr_SetString(PyExc_TypeError, "__gstdetails__ must be a tuple");
    return -1;
  }
  if (PyTuple_Size (details) != 4) {
    PyErr_SetString(PyExc_TypeError, "__gstdetails__ must be contain 4 elements");
    return -1;
  }
  if (!PyArg_ParseTuple (details, "ssss", &gstdetails.longname, &gstdetails.klass,
    &gstdetails.description, &gstdetails.author)) {
    PyErr_SetString (PyExc_TypeError, "__gstdetails__ must be contain 4 strings");
    return -1;
  }
  gst_element_class_set_details (gclass, &gstdetails);
  return 0;
}

static int
_pygst_element_init (gpointer gclass, PyTypeObject *pyclass)
{
  PyObject *templates, *details;
  
  templates = PyDict_GetItemString(pyclass->tp_dict, "__gsttemplates__");
  if (templates) {
    if (add_templates(gclass, templates) != 0)
      return -1;
  } else {
    PyErr_Clear();
  }
  details = PyDict_GetItemString(pyclass->tp_dict, "__gstdetails__");
  if (details) {
    if (_pygst_element_set_details (gclass, details) != 0)
      return -1;
    PyDict_DelItemString(pyclass->tp_dict, "__gstdetails__");
  } else {
    PyErr_Clear();
  }

  return 0;
}
#endif

%%
include
  gstbin.override
  gstbuffer.override
  gstcaps.override
  gstelement.override
  gstevent.override
  gstpad.override
  gststructure.override
%%
init
{
/* FIXME: new in pygtk-2.6 */
#ifdef pyg_register_class_init
    pyg_register_class_init (GST_TYPE_ELEMENT, _pygst_element_init);
#endif
    if (!pygst_value_init())
        return;
}
%%
modulename gst
%%
import gobject.GObject as PyGObject_Type
%%
ignore-glob
  _*
  *_copy
  *_error_quark
  *_free
  *_get_type
  *_private
  *_thyself
  *_valist
  gst_class_*
  gst_init*
  gst_interface_*
  gst_tag_list_get_*
  gst_value_*
%%
ignore
  gst_alloc_trace_list
  gst_alloc_trace_get
  gst_error_get_message
  gst_object_default_deep_notify
  gst_object_check_uniqueness
  gst_object_replace
  gst_parse_launchv
  gst_tag_list_add
  gst_tag_list_add_values
  gst_tag_list_add_valist_values
  gst_tag_list_copy_value
  gst_trace_read_tsc

%%
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 = pygst_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));
#if 0	
	else if (count > 1)
		PyErr_SetString(PyExc_TypeError, "lists are currently unspported");
#endif
	
}

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 = pygst_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.has_key", &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 = pygst_value_as_pyobject(gvalue, TRUE);
		} else {
			PyErr_SetString(PyExc_TypeError, "lists are currently unspported");
		}
	}

	if (val == NULL)
		val = failobj;
	Py_INCREF(val);
	return val;
}
%%
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;
	PyGILState_STATE state;
	
	g_assert(cunote->func);

	state = pyg_gil_state_ensure();

	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_gil_state_release(state);
	
	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 pygst_value_as_pyobject(gvalue, FALSE);
}
%%
override-slot GstObject.tp_repr
static PyObject *
_wrap_gst_object_tp_repr(PyObject *self)
{
    gchar *repr;
    PyObject *ret;
    GstObject *object = GST_OBJECT (pygobject_get (self));

    repr = g_strdup_printf ("<%s object (%s) at 0x%lx>",
	       self->ob_type->tp_name,
	       GST_OBJECT_NAME(object) ? GST_OBJECT_NAME(object) : "unnamed",
	       (long)self);
    ret = PyString_FromString(repr);
    g_free (repr);
    return ret;
}
%%
override-slot GstObject.tp_str
static PyObject *
_wrap_gst_object_tp_str(PyObject *self)
{
    gchar *repr, *path;
    PyObject *ret;
    GstObject *object = GST_OBJECT (pygobject_get (self));

    path = gst_object_get_path_string (object);
    repr = g_strdup_printf ("%s (%s)",
	       path, self->ob_type->tp_name);
    ret = PyString_FromString(repr);
    g_free (repr);
    g_free (path);
    return ret;
}
%%
override-slot GstPluginFeature.tp_repr
static PyObject *
_wrap_gst_plugin_feature_tp_repr(PyObject *self)
{
    gchar *repr;
    PyObject *ret;
    GstPluginFeature *feature = GST_PLUGIN_FEATURE (pygobject_get (self));

    repr = g_strdup_printf ("<%s %s @ 0x%lx>",
	       self->ob_type->tp_name, gst_plugin_feature_get_name (feature),
	       (long) self);
    ret = PyString_FromString(repr);
    g_free (repr);
    return ret;
}
%%
override-slot GstPluginFeature.tp_str
static PyObject *
_wrap_gst_plugin_feature_tp_str(PyObject *self)
{
    gchar *repr;
    PyObject *ret;
    GstPluginFeature *feature = GST_PLUGIN_FEATURE (pygobject_get (self));

    repr = g_strdup_printf ("<%s %s (%d)>",
	       self->ob_type->tp_name, gst_plugin_feature_get_name (feature),
	       gst_plugin_feature_get_rank (feature));
    ret = PyString_FromString(repr);
    g_free (repr);
    return ret;
}
%%
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 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));
}
%%
override gst_main noargs
static PyObject *
_wrap_gst_main(PyObject *self)
{
        pyg_begin_allow_threads;

	_pygst_main();

        pyg_end_allow_threads;
	
	if (PyErr_Occurred())
		return NULL;
	
        Py_INCREF(Py_None);
        return Py_None;

}
%%
override gst_main_quit args
static PyObject *
_wrap_gst_main_quit(PyObject *self)
{

    _pygst_main_quit();
    
    Py_INCREF(Py_None);
    return Py_None;
}
%%
override gst_event_new_any kwargs
static PyObject *
_wrap_gst_event_new_any(PyObject *self, PyObject *args, PyObject *kwargs)
{
    static char *kwlist[] = { "structure", NULL };
    PyObject *py_structure;
    GstStructure *structure = NULL;
    GstEvent *event;

    if (!PyArg_ParseTupleAndKeywords(args, kwargs,
            "O:event_new_any", kwlist, &py_structure))
        return NULL;
    if (pyg_boxed_check(py_structure, GST_TYPE_STRUCTURE))
        structure = pyg_boxed_get(py_structure, GstStructure);
    else {
        PyErr_SetString(PyExc_TypeError,
            "structure should be a GstStructure");
        return NULL;
    }

    event = gst_event_new (GST_EVENT_ANY);
    if (!event) {
        PyErr_SetString(PyExc_RuntimeError,
            "could not create GstEvent object");
        return NULL;
    }
    event->event_data.structure.structure = gst_structure_copy(structure);

    /* pyg_boxed_new handles NULL checking */
    return pyg_boxed_new(GST_TYPE_EVENT, event, TRUE, TRUE);
}
%%
override gst_event_any_get_structure noargs
static PyObject *
_wrap_gst_event_any_get_structure(PyObject *self)
{
    GstStructure *ret;
    GstEvent *event;

    event = pyg_pointer_get(self, GstEvent);
    if (GST_EVENT_TYPE(event) == GST_EVENT_ANY) {
        ret = event->event_data.structure.structure;
        /* pyg_boxed_new handles NULL checking */
        return pyg_boxed_new(GST_TYPE_STRUCTURE, ret, TRUE, TRUE);
    } else {
        Py_INCREF(Py_None);
        return Py_None;
    }
}
%%
override gst_event_new_discontinuous kwargs
static PyObject *
_wrap_gst_event_new_discontinuous(PyObject *self, PyObject *args,
    PyObject *kwargs)
{
    static char *kwlist[] = { "new_media", "format", "value", NULL };
    int new_media = FALSE;
    PyObject *py_format = NULL;
    gint64 value = 0;
    GstFormat format;
    GstEvent *event;

    if (!PyArg_ParseTupleAndKeywords(args, kwargs,
            "iOL:event_new_discontinuous", kwlist, &new_media, &py_format,
            &value)) {
        return NULL;
    }
    if (pyg_enum_get_value(GST_TYPE_FORMAT, py_format, (gint *) &format)) {
        return NULL;
    }

    event = gst_event_new_discontinuous (new_media, format, value,
        GST_FORMAT_UNDEFINED);

    return pyg_boxed_new(GST_TYPE_EVENT, event, TRUE, TRUE);
}
%%
override gst_registry_pool_plugin_list noargs
static PyObject *
_wrap_gst_registry_pool_plugin_list(PyGObject *self)
{
	GList *l, *plugins;
	PyObject *list;
	
	plugins = gst_registry_pool_plugin_list();

	list = PyList_New(0);
	for (l = plugins; l; l = l->next) {
		GstPlugin *plugin = (GstPlugin*)l->data;
		PyList_Append(list,
			      pyg_boxed_new(GST_TYPE_PLUGIN, plugin, TRUE, TRUE));
	}
	g_list_free(plugins);
	
	return list;
}
%%
override gst_registry_pool_feature_list
static PyObject *
_wrap_gst_registry_pool_feature_list(PyGObject *self, PyObject *args)
{
	GList *l, *features;
	PyObject *pygtype, *list;
	GType gtype;
	
	if (!PyArg_ParseTuple(args, "O:registry_pool_feature_list",
			      &pygtype))
		return NULL;

	gtype = pyg_type_from_object (pygtype);
	if (!gtype)
		return NULL;
	
	features = gst_registry_pool_feature_list(gtype);

	list = PyList_New(0);
	for (l = features; l; l = l->next) {
		GstPluginFeature *feature = (GstPluginFeature*)l->data;
		PyList_Append(list, pygobject_new (G_OBJECT (feature)));

	}
	g_list_free(features);
		
	return list;
}
%%
override gst_xml_new noargs

extern PyObject * libxml_xmlDocPtrWrap(xmlDocPtr doc);
extern PyObject * libxml_xmlNodePtrWrap(xmlNodePtr node);
 
/* libxml2 available check */
static PyObject *
_gst_get_libxml2_module(void)
{
    PyObject *xml = NULL;
    
    xml = PyImport_ImportModule("libxml2");
    if (!xml) {
	PyErr_Clear();
	PyErr_SetString(PyExc_RuntimeError,"libxml2 bindings required");
	return NULL;
    }
    
    return xml;
 }

static int
_wrap_gst_xml_new(PyGObject *self)
{
    PyObject *xml = _gst_get_libxml2_module();
    
    if(!xml)
	return -1;
       
    self->obj = (GObject *)gst_xml_new();
    
    if (!self->obj) {
	PyErr_SetString(PyExc_RuntimeError, "could not create GstXML object");
	return -1;
    }
    
    pygobject_register_wrapper((PyObject *)self);
    
    return 0;
}
%%
override gst_xml_get_topelements noargs
static PyObject *
_wrap_gst_xml_get_topelements(PyGObject *self)
{
    GList *l, *xml_elements;
    PyObject *py_list;

    py_list = PyList_New(0);

    xml_elements = gst_xml_get_topelements(GST_XML(self->obj));
    for (l = xml_elements; l; l = l->next) {
	GstElement *element = (GstElement*)l->data;
	
	PyList_Append(py_list, pygobject_new(G_OBJECT(element)));
    }
       
    return py_list;
}
%%
override gst_xml_parse_memory kwargs
static PyObject * 
_wrap_gst_xml_parse_memory(PyGObject *self, PyObject *args, PyObject *kwargs)
{
    static char *kwlist[] = { "buffer", "root", NULL };
    int buffer_len, ret;
    char *root = NULL;
    guchar *buffer;

    if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                    "s#|s:GstXML.parse_memory",
                                    kwlist, &buffer, &buffer_len, &root))
        return NULL;
    
    ret = gst_xml_parse_memory(GST_XML(self->obj),
			       buffer, buffer_len, root);
    
    return PyBool_FromLong(ret);
}
%%
override gst_tag_setter_get_list noargs
static PyObject *
_wrap_gst_tag_setter_get_list(PyGObject *self)
{
    GstTagList *ret;

    ret = (GstTagList*)gst_tag_setter_get_list(GST_TAG_SETTER(self->obj));
    /* pyg_boxed_new handles NULL checking */
    return pyg_boxed_new(GST_TYPE_TAG_LIST, ret, TRUE, TRUE);
}

%%
override gst_probe_new args
static gboolean
probe_handler_marshal(GstProbe *probe, GstData **data, gpointer user_data)
{
    PyGILState_STATE state;
    PyObject *callback, *args;
    PyObject *ret;
    PyObject *py_data;
    PyObject *py_user_data;
    gboolean res;
    gint len, i;

    g_return_val_if_fail(user_data != NULL, FALSE);

    state = pyg_gil_state_ensure();

    py_user_data = (PyObject *) user_data;

    if (GST_IS_BUFFER(*data))
	py_data = pyg_boxed_new(GST_TYPE_BUFFER, *data, TRUE, TRUE);
    else if (GST_IS_EVENT(*data))
	py_data = pyg_boxed_new(GST_TYPE_EVENT, *data, TRUE, TRUE);
    else
	py_data = pyg_boxed_new(GST_TYPE_DATA, *data, TRUE, TRUE);

    callback = PyTuple_GetItem(py_user_data, 0);
    args = Py_BuildValue("(NN)",
        pyg_boxed_new(GST_TYPE_PROBE, probe, TRUE, TRUE),
	py_data);

    len = PyTuple_Size(py_user_data);
    for (i = 1; i < len; ++i) {
        PyObject *tuple = args;
        args = PySequence_Concat(tuple, PyTuple_GetItem(py_user_data, i));
        Py_DECREF(tuple);
    }
    ret = PyObject_CallObject(callback, args);

    if (!ret) {
        PyErr_Print();
        res = FALSE;
    } else {
        res = PyObject_IsTrue(ret);
        Py_DECREF(ret);
    }
    Py_DECREF(args);
    pyg_gil_state_release(state);

    return res;
}

static int
_wrap_gst_probe_new(PyGBoxed *self, PyObject *args, PyObject *kwargs)
{
	PyObject *first, *callback, *cbargs = NULL, *data;

	gboolean single_shot;

	gint len;

        len = PyTuple_Size(args);
        self->gtype = GST_TYPE_PROBE;
	self->free_on_dealloc = FALSE;

	if (len < 2) {
        	PyErr_SetString(PyExc_TypeError,
			"Probe requires at least 2 args");
                return -1;
        }

	first = PySequence_GetSlice(args, 0, 2);
        if (!PyArg_ParseTuple(first, "iO:Probe", &single_shot, &callback)) {
        	Py_DECREF(first);
        	return -1;
    	}
    	Py_DECREF(first);
    	if (!PyCallable_Check(callback)) {
        	PyErr_SetString(PyExc_TypeError, "second argument not callable");
        	return -1;
    	}
	cbargs = PySequence_GetSlice(args, 2, len);
	if (cbargs == NULL)
		return -1;

	data = Py_BuildValue("(ON)", callback, cbargs);
	if (data == NULL)
		return -1;

	self->boxed = gst_probe_new(single_shot, probe_handler_marshal, data);
        return 0;
}

%%
override gst_probe_perform object
static PyObject *
_wrap_gst_probe_perform(PyGBoxed *self, PyObject *args, PyObject *kwargs)
{
    	PyObject *py_data;
	GstData *data = NULL;
	gint len;

        len = PyTuple_Size(args);

	if (len != 1) {
        	PyErr_SetString(PyExc_TypeError,
			"perform requires 1 arg");
                return NULL;
        }

        if (!PyArg_ParseTuple(args, "O:perform", &py_data)) {
		return NULL;
    	}
	/* FIXME: GstBuffer and GstEvent are not really "subclasses" so
	   we hardcode checks for them here by hand.  Ugh. */
	if (pyg_boxed_check(py_data, GST_TYPE_EVENT))
        	data = GST_DATA(pyg_boxed_get(py_data, GstEvent));
	if (pyg_boxed_check(py_data, GST_TYPE_BUFFER))
        	data = GST_DATA(pyg_boxed_get(py_data, GstBuffer));
	if (pyg_boxed_check(py_data, GST_TYPE_DATA))
        	data = pyg_boxed_get(py_data, GstData);

	if (!data) {
        	PyErr_SetString(PyExc_TypeError, "arg 1 must be GstData");
                return NULL;
	}

    	return PyBool_FromLong(gst_probe_perform(self->boxed, &data));
}
%%
override gst_plugin_get_version noargs
static PyObject *
_wrap_gst_plugin_get_version(PyGObject *self)
{
        PyObject *tuple;
        const gchar *version;
        gchar **items, **p;
        gint i = 0;
        gint count = 0;
        
        version = gst_plugin_get_version(GST_PLUGIN(self->obj));
        items = g_strsplit(version, ".", 4);
        for (p = items; *p; ++p) ++count;

	tuple = PyTuple_New(count);
        for (p = items; *p; ++p) {
                PyObject *item;
                item = PyInt_FromString(*p, NULL, 10);
                PyTuple_SetItem(tuple, i, item);
                i++;
        }

        g_strfreev(items);
        return tuple;
}
%%
override gst_element_register kwargs

static GstPlugin *
_pygst_get_plugin(void)
{
  PyObject *dict = NULL, *module = NULL, *pyplugin = NULL;
  GstPlugin *ret;
  
  if (!(module = PyImport_ImportModule ("gst")))
    goto err;
  if (!(dict = PyModule_GetDict (module)))
    goto err;
  if (!(pyplugin = PyDict_GetItemString (dict, "__plugin__")))
    goto err;
  ret = pyg_boxed_get (pyplugin, GstPlugin);
  
  Py_DECREF (module);
  return ret;
  
err:
  Py_XDECREF (module);
  PyErr_Clear ();
  return NULL;
}

static PyObject *
_wrap_gst_element_register(PyObject *self, PyObject *args, PyObject *kwargs)
{
    static char *kwlist[] = { "type", "elementname", "rank", NULL };
    PyObject *py_type = NULL;
    guint rank = GST_RANK_NONE;
    char *elementname = NULL;
    int ret;
    GType type;

    /* FIXME: can we make the name optional, too? Anyone know a good default? */
    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "Os|I:element_register", kwlist,
	&py_type, &elementname, &rank))
        return NULL;
    if ((type = pyg_type_from_object(py_type)) == 0)
        return NULL;
    
    ret = gst_element_register(_pygst_get_plugin(), elementname, rank, type);
    return PyBool_FromLong(ret);
}