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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#include "aubio-types.h"
typedef struct
{
PyObject_HEAD
aubio_filter_t * o;
uint_t order;
fvec_t vec;
PyObject *out;
fvec_t c_out;
} Py_filter;
static char Py_filter_doc[] = "filter object";
static PyObject *
Py_filter_new (PyTypeObject * type, PyObject * args, PyObject * kwds)
{
int order= 0;
Py_filter *self;
static char *kwlist[] = { "order", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kwds, "|I", kwlist,
&order)) {
return NULL;
}
self = (Py_filter *) type->tp_alloc (type, 0);
if (self == NULL) {
return NULL;
}
self->order = 7;
if (order > 0) {
self->order = order;
} else if (order < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative order");
return NULL;
}
return (PyObject *) self;
}
static int
Py_filter_init (Py_filter * self, PyObject * args, PyObject * kwds)
{
self->o = new_aubio_filter (self->order);
if (self->o == NULL) {
return -1;
}
self->out = NULL;
return 0;
}
static void
Py_filter_del (Py_filter * self)
{
Py_XDECREF(self->out);
del_aubio_filter (self->o);
Py_TYPE(self)->tp_free ((PyObject *) self);
}
static PyObject *
Py_filter_do(Py_filter * self, PyObject * args)
{
PyObject *input;
if (!PyArg_ParseTuple (args, "O:digital_filter.do", &input)) {
return NULL;
}
if (input == NULL) {
return NULL;
}
if (!PyAubio_ArrayToCFvec(input, &(self->vec))) {
return NULL;
}
// initialize output now
if (self->out == NULL) {
self->out = new_py_fvec(self->vec.length);
}
Py_INCREF(self->out);
if (!PyAubio_ArrayToCFvec(self->out, &(self->c_out)) ) {
return NULL;
}
// compute the function
aubio_filter_do_outplace (self->o, &(self->vec), &(self->c_out));
return self->out;
}
static PyObject *
Py_filter_set_c_weighting (Py_filter * self, PyObject *args)
{
uint_t err = 0;
uint_t samplerate;
if (!PyArg_ParseTuple (args, "I", &samplerate)) {
return NULL;
}
err = aubio_filter_set_c_weighting (self->o, samplerate);
if (err > 0) {
PyErr_SetString (PyExc_ValueError,
"error when setting filter to C-weighting");
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
Py_filter_set_a_weighting (Py_filter * self, PyObject *args)
{
uint_t err = 0;
uint_t samplerate;
if (!PyArg_ParseTuple (args, "I", &samplerate)) {
return NULL;
}
err = aubio_filter_set_a_weighting (self->o, samplerate);
if (err > 0) {
PyErr_SetString (PyExc_ValueError,
"error when setting filter to A-weighting");
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
Py_filter_set_biquad(Py_filter * self, PyObject *args)
{
uint_t err = 0;
lsmp_t b0, b1, b2, a1, a2;
if (!PyArg_ParseTuple (args, "ddddd", &b0, &b1, &b2, &a1, &a2)) {
return NULL;
}
err = aubio_filter_set_biquad (self->o, b0, b1, b2, a1, a2);
if (err > 0) {
PyErr_SetString (PyExc_ValueError,
"error when setting filter with biquad coefficients");
return NULL;
}
Py_RETURN_NONE;
}
static PyMemberDef Py_filter_members[] = {
// TODO remove READONLY flag and define getter/setter
{"order", T_INT, offsetof (Py_filter, order), READONLY,
"order of the filter"},
{NULL} /* Sentinel */
};
static PyMethodDef Py_filter_methods[] = {
{"set_c_weighting", (PyCFunction) Py_filter_set_c_weighting, METH_VARARGS,
"set filter coefficients to C-weighting"},
{"set_a_weighting", (PyCFunction) Py_filter_set_a_weighting, METH_VARARGS,
"set filter coefficients to A-weighting"},
{"set_biquad", (PyCFunction) Py_filter_set_biquad, METH_VARARGS,
"set b0, b1, b2, a1, a2 biquad coefficients"},
{NULL}
};
PyTypeObject Py_filterType = {
PyVarObject_HEAD_INIT(NULL, 0)
"aubio.digital_filter", /* tp_name */
sizeof (Py_filter), /* tp_basicsize */
0, /* tp_itemsize */
(destructor) Py_filter_del, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, //(reprfunc) Py_filter_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
(ternaryfunc)Py_filter_do, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
Py_filter_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
Py_filter_methods, /* tp_methods */
Py_filter_members, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc) Py_filter_init, /* tp_init */
0, /* tp_alloc */
Py_filter_new, /* tp_new */
0,
0,
0,
0,
0,
0,
0,
0,
0,
};
|
