1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* $Id$
-----------------------------------------------------------------------------
This source file is part of VideoTexture library
Copyright (c) 2007 The Zdeno Ash Miklas
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/
#include "FilterBase.h"
#include <Python.h>
#include <structmember.h>
// FilterBase class implementation
// constructor
FilterBase::FilterBase (void) : m_previous(NULL) {}
// destructor
FilterBase::~FilterBase (void)
{
// release Python objects, if not released yet
release();
}
// release python objects
void FilterBase::release (void)
{
// release previous filter object
setPrevious(NULL);
}
// set new previous filter
void FilterBase::setPrevious (PyFilter * filt, bool useRefCnt)
{
// if reference counting has to be used
if (useRefCnt)
{
// reference new filter
if (filt != NULL) Py_INCREF(filt);
// release old filter
Py_XDECREF(m_previous);
}
// set new previous filter
m_previous = filt;
}
// find first filter
FilterBase * FilterBase::findFirst (void)
{
// find first filter in chain
FilterBase * frst;
for (frst = this; frst->m_previous != NULL; frst = frst->m_previous->m_filter);
// set first filter
return frst;
}
// list offilter types
PyTypeList pyFilterTypes;
// functions for python interface
// object allocation
PyObject * Filter_allocNew (PyTypeObject * type, PyObject * args, PyObject * kwds)
{
// allocate object
PyFilter * self = reinterpret_cast<PyFilter*>(type->tp_alloc(type, 0));
// initialize object structure
self->m_filter = NULL;
// return allocated object
return reinterpret_cast<PyObject*>(self);
}
// object deallocation
void Filter_dealloc (PyFilter * self)
{
// release object attributes
if (self->m_filter != NULL)
{
self->m_filter->release();
delete self->m_filter;
self->m_filter = NULL;
}
}
// get previous pixel filter object
PyObject * Filter_getPrevious (PyFilter * self, void * closure)
{
// if filter object is available
if (self->m_filter != NULL)
{
// pixel filter object
PyObject * filt = reinterpret_cast<PyObject*>(self->m_filter->getPrevious());
// if filter is present
if (filt != NULL)
{
// return it
Py_INCREF(filt);
return filt;
}
}
// otherwise return none
Py_RETURN_NONE;
}
// set previous pixel filter object
int Filter_setPrevious (PyFilter * self, PyObject * value, void * closure)
{
// if filter object is available
if (self->m_filter != NULL)
{
// check new value
if (value == NULL || !pyFilterTypes.in(value->ob_type))
{
// report value error
PyErr_SetString(PyExc_TypeError, "Invalid type of value");
return -1;
}
// set new value
self->m_filter->setPrevious(reinterpret_cast<PyFilter*>(value));
}
// return success
return 0;
}
|