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
|
#include "aubio-types.h"
static char Py_fft_doc[] = "fft object";
typedef struct
{
PyObject_HEAD
aubio_fft_t * o;
uint_t win_s;
// do / rdo input vectors
fvec_t vecin;
cvec_t cvecin;
// do / rdo output results
PyObject *doout;
PyObject *rdoout;
} Py_fft;
static PyObject *
Py_fft_new (PyTypeObject * type, PyObject * args, PyObject * kwds)
{
int win_s = 0;
Py_fft *self;
static char *kwlist[] = { "win_s", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kwds, "|I", kwlist,
&win_s)) {
return NULL;
}
self = (Py_fft *) type->tp_alloc (type, 0);
if (self == NULL) {
return NULL;
}
self->win_s = Py_default_vector_length;
if (win_s > 0) {
self->win_s = win_s;
} else if (win_s < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative window size");
return NULL;
}
return (PyObject *) self;
}
static int
Py_fft_init (Py_fft * self, PyObject * args, PyObject * kwds)
{
self->o = new_aubio_fft (self->win_s);
if (self->o == NULL) {
PyErr_Format(PyExc_RuntimeError,
"error creating fft with win_s=%d "
"(should be a power of 2 greater than 1; "
"try recompiling aubio with --enable-fftw3)",
self->win_s);
return -1;
}
self->doout = new_py_cvec(self->win_s);
self->rdoout = new_py_fvec(self->win_s);
return 0;
}
static void
Py_fft_del (Py_fft *self, PyObject *unused)
{
Py_XDECREF(self->doout);
Py_XDECREF(self->rdoout);
if (self->o) {
del_aubio_fft(self->o);
}
Py_TYPE(self)->tp_free((PyObject *) self);
}
static PyObject *
Py_fft_do(Py_fft * self, PyObject * args)
{
PyObject *input;
cvec_t c_out;
if (!PyArg_ParseTuple (args, "O", &input)) {
return NULL;
}
if (!PyAubio_ArrayToCFvec(input, &(self->vecin))) {
return NULL;
}
if (self->vecin.length != self->win_s) {
PyErr_Format(PyExc_ValueError,
"input array has length %d, but fft expects length %d",
self->vecin.length, self->win_s);
return NULL;
}
Py_INCREF(self->doout);
if (!PyAubio_PyCvecToCCvec(self->doout, &c_out)) {
return NULL;
}
// compute the function
aubio_fft_do (self->o, &(self->vecin), &c_out);
return self->doout;
}
static PyMemberDef Py_fft_members[] = {
{"win_s", T_INT, offsetof (Py_fft, win_s), READONLY,
"size of the window"},
{NULL}
};
static PyObject *
Py_fft_rdo(Py_fft * self, PyObject * args)
{
PyObject *input;
fvec_t out;
if (!PyArg_ParseTuple (args, "O", &input)) {
return NULL;
}
if (!PyAubio_PyCvecToCCvec (input, &(self->cvecin)) ) {
return NULL;
}
if (self->cvecin.length != self->win_s / 2 + 1) {
PyErr_Format(PyExc_ValueError,
"input cvec has length %d, but fft expects length %d",
self->cvecin.length, self->win_s / 2 + 1);
return NULL;
}
Py_INCREF(self->rdoout);
if (!PyAubio_ArrayToCFvec(self->rdoout, &out) ) {
return NULL;
}
// compute the function
aubio_fft_rdo (self->o, &(self->cvecin), &out);
return self->rdoout;
}
static PyMethodDef Py_fft_methods[] = {
{"rdo", (PyCFunction) Py_fft_rdo, METH_VARARGS,
"synthesis of spectral grain"},
{NULL}
};
PyTypeObject Py_fftType = {
PyVarObject_HEAD_INIT (NULL, 0)
"aubio.fft",
sizeof (Py_fft),
0,
(destructor) Py_fft_del,
0,
0,
0,
0,
0,
0,
0,
0,
0,
(ternaryfunc)Py_fft_do,
0,
0,
0,
0,
Py_TPFLAGS_DEFAULT,
Py_fft_doc,
0,
0,
0,
0,
0,
0,
Py_fft_methods,
Py_fft_members,
0,
0,
0,
0,
0,
0,
(initproc) Py_fft_init,
0,
Py_fft_new,
0,
0,
0,
0,
0,
0,
0,
0,
0,
};
|
