gstreamer/gst/gstmodule.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 "pygstminiobject.h"
#include <locale.h>
/* include this first, before NO_IMPORT_PYGOBJECT is defined */
#include <pygobject.h>
#include <gst/gst.h>
#include <gst/gstversion.h>
void pygst_register_classes (PyObject *d);
void pygst_add_constants(PyObject *module, const gchar *strip_prefix);
void _pygst_register_boxed_types(PyObject *moddict);
extern PyMethodDef pygst_functions[];
extern GSList *mainloops;
extern void _pygst_main_quit(void);
extern PyObject *PyGstExc_LinkError;
GST_DEBUG_CATEGORY (pygst_debug); /* for bindings code */
GST_DEBUG_CATEGORY (python_debug); /* for python code */
/* copied from pygtk to register GType */
#define REGISTER_TYPE(d, type, name) \
type.ob_type = &PyType_Type; \
type.tp_alloc = PyType_GenericAlloc; \
type.tp_new = PyType_GenericNew; \
if (PyType_Ready(&type)) \
return; \
PyDict_SetItemString(d, name, (PyObject *)&type);
#define REGISTER_GTYPE(d, type, name, gtype) \
REGISTER_TYPE(d, type, name); \
PyDict_SetItemString(type.tp_dict, "__gtype__", \
o=pyg_type_wrapper_new(gtype)); \
Py_DECREF(o);
/* This is a timeout that gets added to the mainloop to handle SIGINT (Ctrl-C)
* Other signals get handled at some other point where transition from
* C -> Python is being made.
*/
static gboolean
python_do_pending_calls(gpointer data)
{
gboolean quit = FALSE;
PyGILState_STATE state;
if (PyOS_InterruptOccurred()) {
state = pyg_gil_state_ensure();
PyErr_SetNone(PyExc_KeyboardInterrupt);
pyg_gil_state_release(state);
quit = TRUE;
}
if (quit && mainloops != NULL)
_pygst_main_quit();
return TRUE;
}
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static PyObject*
pygstminiobject_from_gvalue(const GValue *value)
{
GstMiniObject *miniobj;
if ((miniobj = gst_value_get_mini_object (value)) == NULL)
return NULL;
return pygstminiobject_new(miniobj);
}
static int
pygstminiobject_to_gvalue(GValue *value, PyObject *obj)
{
PyGstMiniObject *self = (PyGstMiniObject*) obj;
gst_value_set_mini_object(value, self->obj);
return 0;
}
DL_EXPORT(void)
init_gst (void)
{
PyObject *m, *d;
PyObject *av, *tuple;
int argc, i;
char **argv;
init_pygobject ();
/* pull in arguments */
av = PySys_GetObject ("argv");
if (av != NULL) {
argc = PyList_Size (av);
argv = g_new (char *, argc);
for (i = 0; i < argc; i++)
argv[i] = g_strdup (PyString_AsString (PyList_GetItem (av, i)));
} else {
/* gst_init_check does not like argc == 0 */
argc = 1;
argv = g_new (char *, argc);
argv[0] = g_strdup("");
}
if (!gst_init_check (&argc, &argv)) {
if (argv != NULL) {
for (i = 0; i < argc; i++)
g_free (argv[i]);
g_free (argv);
}
PyErr_SetString (PyExc_RuntimeError, "can't initialize module gst");
setlocale(LC_NUMERIC, "C");
return;
}
setlocale(LC_NUMERIC, "C");
if (argv != NULL) {
PySys_SetArgv (argc, argv);
for (i = 0; i < argc; i++)
g_free (argv[i]);
g_free (argv);
}
/* _pygst_register_boxed_types (NULL); */
pygobject_register_sinkfunc(GST_TYPE_OBJECT, pygstobject_sink);
m = Py_InitModule ("_gst", pygst_functions);
d = PyModule_GetDict (m);
/* gst+ version */
tuple = Py_BuildValue ("(iii)", GST_VERSION_MAJOR, GST_VERSION_MINOR,
GST_VERSION_MICRO);
PyDict_SetItemString(d, "gst_version", tuple);
Py_DECREF(tuple);
/* gst-python version */
tuple = Py_BuildValue ("(iii)", PYGST_MAJOR_VERSION, PYGST_MINOR_VERSION,
PYGST_MICRO_VERSION);
PyDict_SetItemString(d, "pygst_version", tuple);
Py_DECREF(tuple);
/* clock stuff */
PyModule_AddIntConstant(m, "SECOND", GST_SECOND);
PyModule_AddIntConstant(m, "MSECOND", GST_MSECOND);
PyModule_AddIntConstant(m, "NSECOND", GST_NSECOND);
PyModule_AddObject(m, "CLOCK_TIME_NONE", PyLong_FromUnsignedLongLong(GST_CLOCK_TIME_NONE));
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/* LinkError exception */
PyGstExc_LinkError = PyErr_NewException("gst.LinkError",
PyExc_RuntimeError,
NULL);
PyDict_SetItemString(d, "LinkError", PyGstExc_LinkError);
pygstminiobject_register_class(d, "GstMiniObject", GST_TYPE_MINI_OBJECT,
&PyGstMiniObject_Type, NULL);
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pyg_register_boxed_custom(GST_TYPE_MINI_OBJECT,
pygstminiobject_from_gvalue,
pygstminiobject_to_gvalue);
pygst_register_classes (d);
pygst_add_constants (m, "GST_");
/* make our types available */
PyModule_AddObject (m, "TYPE_ELEMENT_FACTORY",
pyg_type_wrapper_new(GST_TYPE_ELEMENT_FACTORY));
PyModule_AddObject (m, "TYPE_INDEX_FACTORY",
pyg_type_wrapper_new(GST_TYPE_INDEX_FACTORY));
PyModule_AddObject (m, "TYPE_TYPE_FIND_FACTORY",
pyg_type_wrapper_new(GST_TYPE_TYPE_FIND_FACTORY));
/* Initialize debugging category */
GST_DEBUG_CATEGORY_INIT (pygst_debug, "pygst", 0, "GStreamer python bindings");
GST_DEBUG_CATEGORY_INIT (python_debug, "python", 0, "python code using gst-python");
g_timeout_add_full (0, 100, python_do_pending_calls, NULL, NULL);
if (PyErr_Occurred ()) {
Py_FatalError ("can't initialize module gst");
}
}