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overrides: Make it possible to add metadatas and PadTemplates to GstElementClass

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This commit is contained in:
Thibault Saunier 2012-08-19 02:25:13 -04:00
parent 0f8f27e55c
commit 5adc55d50f
1 changed files with 101 additions and 4 deletions
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103
gi/overrides/gstmodule.c
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@ -1,6 +1,7 @@
/* -*- 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
@ -31,8 +32,8 @@
#include <locale.h>
#define PYGLIB_MODULE_START(symbol, modname) \
DL_EXPORT(void) init##symbol(void) \
#define PYGLIB_MODULE_START(symbol, modname) \
DL_EXPORT(void) init##symbol(void) \
{ \
PyObject *module; \
module = Py_InitModule(modname, symbol##_functions);
@ -92,6 +93,102 @@ gi_gst_register_types (PyObject * d)
gi_gst_fraction_from_value, gi_gst_fraction_to_value);
}
static int
add_templates (gpointer gclass, PyObject * templates)
{
gint i, len;
PyGObject *templ;
if (PyTuple_Check (templates)) {
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 (templ)) == 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")
@ -102,7 +199,7 @@ PYGLIB_MODULE_START (_gi_gst, "_gi_gst")
d = PyModule_GetDict (module);
gi_gst_register_types (d);
pyg_register_class_init (GST_TYPE_ELEMENT, _pygst_element_init);
}
PYGLIB_MODULE_END;