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gstreamer/gst/gstmodule.c
Thiago Santos 501515522f gstmodule: Check for Py_None when setting a miniobject 
Check if we got a None value before trying to use it as a
PyGstMiniObject.

https://bugzilla.gnome.org/show_bug.cgi?id=649227
2011-05-02 17:05:27 -03:00

395 lines
12 KiB
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 this first, before NO_IMPORT_PYGOBJECT is defined */
#include <pygobject.h>
#include <gst/gst.h>
#include <gst/gstversion.h>
#include "pygst-private.h"
#include "pygstexception.h"
#include <locale.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[];
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);
static PyObject *
pygstminiobject_from_gvalue (const GValue * value)
{
GstMiniObject *miniobj;
if ((miniobj = gst_value_get_mini_object (value)) == NULL) {
Py_INCREF (Py_None);
return Py_None;
}
return pygstminiobject_new (miniobj);
}
static int
pygstminiobject_to_gvalue (GValue * value, PyObject * obj)
{
PyGstMiniObject *self = (PyGstMiniObject *) obj;
gst_value_set_mini_object (value, obj == Py_None ? NULL : self->obj);
return 0;
}
static void
sink_gstobject (GObject * object)
{
if (GST_OBJECT_IS_FLOATING (object)) {
g_object_ref (object);
gst_object_sink (GST_OBJECT (object));
}
}
static PyObject *
pygst_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 ("gst");
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
pygst_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;
}
struct _PyGst_Functions pygst_api_functions = {
pygst_caps_from_pyobject,
pygst_iterator_new,
pygstminiobject_new
};
/* for addon libraries ... */
static void
pygst_register_api (PyObject * d)
{
PyObject *api;
api = PyCObject_FromVoidPtr (&pygst_api_functions, NULL);
PyDict_SetItemString (d, "_PyGst_API", api);
Py_DECREF (api);
}
DL_EXPORT (void)
init_gst (void)
{
PyObject *m, *d;
PyObject *av, *tuple;
int argc, i;
guint major, minor, micro, nano;
char **argv;
GError *error = NULL;
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, &error)) {
gchar *errstr;
if (argv != NULL) {
for (i = 0; i < argc; i++)
g_free (argv[i]);
g_free (argv);
}
errstr = g_strdup_printf ("can't initialize module gst: %s",
error ? GST_STR_NULL (error->message) : "no error given");
PyErr_SetString (PyExc_RuntimeError, errstr);
g_free (errstr);
g_error_free (error);
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);
}
/* Initialize debugging category */
GST_DEBUG_CATEGORY_INIT (pygst_debug, "pygst", 0,
"GStreamer python bindings");
GST_DEBUG_CATEGORY_INIT (python_debug, "python", GST_DEBUG_FG_GREEN,
"python code using gst-python");
pygobject_register_sinkfunc (GST_TYPE_OBJECT, sink_gstobject);
m = Py_InitModule ("_gst", pygst_functions);
d = PyModule_GetDict (m);
pygst_register_api (d);
/* gst version */
gst_version (&major, &minor, &micro, &nano);
tuple = Py_BuildValue ("(iii)", major, minor, 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));
PyModule_AddObject (m, "BUFFER_OFFSET_NONE",
PyLong_FromUnsignedLongLong (GST_BUFFER_OFFSET_NONE));
pygst_exceptions_register_classes (d);
REGISTER_TYPE (d, PyGstIterator_Type, "Iterator");
pygstminiobject_register_class (d, "GstMiniObject", GST_TYPE_MINI_OBJECT,
&PyGstMiniObject_Type, NULL);
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));
#define ADD_GST_TAG(a) PyModule_AddStringConstant(m, "TAG_" #a, GST_TAG_##a)
/* GStreamer core tags */
ADD_GST_TAG (TITLE);
ADD_GST_TAG (ARTIST);
ADD_GST_TAG (ALBUM);
ADD_GST_TAG (DATE);
ADD_GST_TAG (GENRE);
ADD_GST_TAG (COMMENT);
ADD_GST_TAG (TRACK_NUMBER);
ADD_GST_TAG (TRACK_COUNT);
ADD_GST_TAG (ALBUM_VOLUME_NUMBER);
ADD_GST_TAG (ALBUM_VOLUME_COUNT);
ADD_GST_TAG (LOCATION);
ADD_GST_TAG (DESCRIPTION);
ADD_GST_TAG (VERSION);
ADD_GST_TAG (ISRC);
ADD_GST_TAG (ORGANIZATION);
ADD_GST_TAG (COPYRIGHT);
ADD_GST_TAG (CONTACT);
ADD_GST_TAG (LICENSE);
ADD_GST_TAG (PERFORMER);
ADD_GST_TAG (DURATION);
ADD_GST_TAG (CODEC);
ADD_GST_TAG (VIDEO_CODEC);
ADD_GST_TAG (AUDIO_CODEC);
ADD_GST_TAG (BITRATE);
ADD_GST_TAG (NOMINAL_BITRATE);
ADD_GST_TAG (MINIMUM_BITRATE);
ADD_GST_TAG (MAXIMUM_BITRATE);
ADD_GST_TAG (SERIAL);
ADD_GST_TAG (ENCODER);
ADD_GST_TAG (ENCODER_VERSION);
ADD_GST_TAG (TRACK_GAIN);
ADD_GST_TAG (TRACK_PEAK);
ADD_GST_TAG (ALBUM_GAIN);
ADD_GST_TAG (ALBUM_PEAK);
ADD_GST_TAG (LANGUAGE_CODE);
ADD_GST_TAG (IMAGE);
ADD_GST_TAG (PREVIEW_IMAGE);
ADD_GST_TAG (EXTENDED_COMMENT);
ADD_GST_TAG (REFERENCE_LEVEL);
ADD_GST_TAG (BEATS_PER_MINUTE);
ADD_GST_TAG (LICENSE_URI);
ADD_GST_TAG (COPYRIGHT_URI);
ADD_GST_TAG (COMPOSER);
ADD_GST_TAG (ARTIST_SORTNAME);
ADD_GST_TAG (ALBUM_SORTNAME);
ADD_GST_TAG (TITLE_SORTNAME);
#if ((GST_VERSION_MICRO >= 21) || (GST_VERSION_MICRO == 20 && GST_VERSION_NANO > 0))
ADD_GST_TAG (ATTACHMENT);
ADD_GST_TAG (KEYWORDS);
ADD_GST_TAG (GEO_LOCATION_NAME);
ADD_GST_TAG (GEO_LOCATION_LATITUDE);
ADD_GST_TAG (GEO_LOCATION_LONGITUDE);
ADD_GST_TAG (GEO_LOCATION_ELEVATION);
#if ((GST_VERSION_MICRO >= 23) || (GST_VERSION_MICRO == 22 && GST_VERSION_NANO > 0))
ADD_GST_TAG (SUBTITLE_CODEC);
ADD_GST_TAG (HOMEPAGE);
#if ((GST_VERSION_MICRO >= 24) || (GST_VERSION_MICRO == 23 && GST_VERSION_NANO > 0))
ADD_GST_TAG (CONTAINER_FORMAT);
#if ((GST_VERSION_MICRO >= 25) || (GST_VERSION_MICRO == 24 && GST_VERSION_NANO > 0))
ADD_GST_TAG (ALBUM_ARTIST);
ADD_GST_TAG (ALBUM_ARTIST_SORTNAME);
#if ((GST_VERSION_MICRO >= 26) || (GST_VERSION_MICRO == 25 && GST_VERSION_NANO > 0))
ADD_GST_TAG (SHOW_NAME);
ADD_GST_TAG (SHOW_SORTNAME);
ADD_GST_TAG (SHOW_EPISODE_NUMBER);
ADD_GST_TAG (SHOW_SEASON_NUMBER);
ADD_GST_TAG (LYRICS);
ADD_GST_TAG (COMPOSER_SORTNAME);
ADD_GST_TAG (GROUPING);
#if ((GST_VERSION_MICRO >= 29) || (GST_VERSION_MICRO == 28 && GST_VERSION_NANO > 0))
ADD_GST_TAG (GEO_LOCATION_COUNTRY);
ADD_GST_TAG (GEO_LOCATION_CITY);
ADD_GST_TAG (GEO_LOCATION_SUBLOCATION);
ADD_GST_TAG (USER_RATING);
#if ((GST_VERSION_MICRO >= 30) || (GST_VERSION_MICRO == 29 && GST_VERSION_NANO > 0))
ADD_GST_TAG (DEVICE_MANUFACTURER);
ADD_GST_TAG (IMAGE_ORIENTATION);
ADD_GST_TAG (DEVICE_MODEL);
ADD_GST_TAG (GEO_LOCATION_MOVEMENT_SPEED);
ADD_GST_TAG (GEO_LOCATION_MOVEMENT_DIRECTION);
ADD_GST_TAG (GEO_LOCATION_CAPTURE_DIRECTION);
ADD_GST_TAG (IMAGE_ORIENTATION);
#if ((GST_VERSION_MICRO >= 31) || (GST_VERSION_MICRO == 30 && GST_VERSION_NANO > 0))
#define ADD_FACTORY_TYPE(a) PyModule_AddObject(m, "ELEMENT_FACTORY_TYPE_" #a,\
PyLong_FromUnsignedLongLong(GST_ELEMENT_FACTORY_TYPE_##a))
ADD_FACTORY_TYPE (DECODER);
ADD_FACTORY_TYPE (ENCODER);
ADD_FACTORY_TYPE (SINK);
ADD_FACTORY_TYPE (SRC);
ADD_FACTORY_TYPE (MUXER);
ADD_FACTORY_TYPE (DEMUXER);
ADD_FACTORY_TYPE (PARSER);
ADD_FACTORY_TYPE (PAYLOADER);
ADD_FACTORY_TYPE (DEPAYLOADER);
ADD_FACTORY_TYPE (FORMATTER);
ADD_FACTORY_TYPE (MAX_ELEMENTS);
ADD_FACTORY_TYPE (MEDIA_VIDEO);
ADD_FACTORY_TYPE (MEDIA_AUDIO);
ADD_FACTORY_TYPE (MEDIA_IMAGE);
ADD_FACTORY_TYPE (MEDIA_SUBTITLE);
ADD_FACTORY_TYPE (MEDIA_METADATA);
ADD_FACTORY_TYPE (ANY);
ADD_FACTORY_TYPE (MEDIA_ANY);
ADD_FACTORY_TYPE (VIDEO_ENCODER);
ADD_FACTORY_TYPE (AUDIO_ENCODER);
ADD_FACTORY_TYPE (AUDIOVIDEO_SINKS);
ADD_FACTORY_TYPE (DECODABLE);
ADD_GST_TAG (DATE_TIME);
ADD_GST_TAG (APPLICATION_NAME);
ADD_GST_TAG (APPLICATION_DATA);
ADD_GST_TAG (GEO_LOCATION_HORIZONTAL_ERROR);
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
PyModule_AddStringConstant (m, "LIBRARY_ERROR",
(gchar *) g_quark_to_string (GST_LIBRARY_ERROR));
PyModule_AddStringConstant (m, "RESOURCE_ERROR",
(gchar *) g_quark_to_string (GST_RESOURCE_ERROR));
PyModule_AddStringConstant (m, "CORE_ERROR",
(gchar *) g_quark_to_string (GST_CORE_ERROR));
PyModule_AddStringConstant (m, "STREAM_ERROR",
(gchar *) g_quark_to_string (GST_STREAM_ERROR));
pyg_register_gtype_custom (GST_TYPE_FRACTION,
pygst_fraction_from_value, pygst_fraction_to_value);
if (PyErr_Occurred ()) {
Py_FatalError ("can't initialize module gst");
}
}
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