ref: c37bc1969be3955f877f6af005dd841b68f457d5
dir: /python/ext/py-cvec.c/
#include "aubio-types.h"
/* cvec type definition
class cvec():
def __new__(self, length = 1024):
self.length = length / 2 + 1
self.norm = np.zeros(length / 2 + 1)
self.phas = np.zeros(length / 2 + 1)
*/
// special python type for cvec
typedef struct
{
PyObject_HEAD
PyObject *norm;
PyObject *phas;
uint_t length;
} Py_cvec;
static char Py_cvec_doc[] = ""
"cvec(size)\n"
"\n"
"A container holding spectral data.\n"
"\n"
"Create one `cvec` to store the spectral information of a window\n"
"of `size` points. The data will be stored in two vectors,\n"
":attr:`phas` and :attr:`norm`, each of shape (:attr:`length`,),\n"
"with `length = size // 2 + 1`.\n"
"\n"
"Parameters\n"
"----------\n"
"size: int\n"
" Size of spectrum to create.\n"
"\n"
"Examples\n"
"--------\n"
">>> c = aubio.cvec(1024)\n"
">>> c\n"
"aubio cvec of 513 elements\n"
">>> c.length\n"
"513\n"
">>> c.norm.dtype, c.phas.dtype\n"
"(dtype('float32'), dtype('float32'))\n"
">>> c.norm.shape, c.phas.shape\n"
"((513,), (513,))\n"
"\n"
"See Also\n"
"--------\n"
"fvec, fft, pvoc\n"
"";
PyObject *
new_py_cvec(uint_t length) {
Py_cvec* vec = (Py_cvec*) PyObject_New (Py_cvec, &Py_cvecType);
npy_intp dims[] = { length / 2 + 1, 1 };
vec->norm = PyArray_ZEROS(1, dims, AUBIO_NPY_SMPL, 0);
vec->phas = PyArray_ZEROS(1, dims, AUBIO_NPY_SMPL, 0);
vec->length = length / 2 + 1;
return (PyObject*)vec;
}
int
PyAubio_PyCvecToCCvec (PyObject *input, cvec_t *i) {
if (PyObject_TypeCheck (input, &Py_cvecType)) {
Py_cvec * in = (Py_cvec *)input;
i->norm = (smpl_t *) PyArray_GETPTR1 ((PyArrayObject *)(in->norm), 0);
i->phas = (smpl_t *) PyArray_GETPTR1 ((PyArrayObject *)(in->phas), 0);
i->length = ((Py_cvec*)input)->length;
return 1;
} else {
PyErr_SetString (PyExc_ValueError, "input array should be aubio.cvec");
return 0;
}
}
static PyObject *
Py_cvec_new (PyTypeObject * type, PyObject * args, PyObject * kwds)
{
int length= 0;
Py_cvec *self;
static char *kwlist[] = { "length", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kwds, "|I", kwlist,
&length)) {
return NULL;
}
self = (Py_cvec *) type->tp_alloc (type, 0);
self->length = Py_default_vector_length / 2 + 1;
if (self == NULL) {
return NULL;
}
if (length > 0) {
self->length = length / 2 + 1;
} else if (length < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative number of elements");
return NULL;
}
return (PyObject *) self;
}
static int
Py_cvec_init (Py_cvec * self, PyObject * args, PyObject * kwds)
{
npy_intp dims[] = { self->length, 1 };
self->phas = PyArray_ZEROS(1, dims, AUBIO_NPY_SMPL, 0);
self->norm = PyArray_ZEROS(1, dims, AUBIO_NPY_SMPL, 0);
return 0;
}
static void
Py_cvec_del (Py_cvec * self)
{
Py_DECREF(self->norm);
Py_DECREF(self->phas);
Py_TYPE(self)->tp_free ((PyObject *) self);
}
static PyObject *
Py_cvec_repr (Py_cvec * self, PyObject * unused)
{
PyObject *format = NULL;
PyObject *args = NULL;
PyObject *result = NULL;
format = PyUnicode_FromString ("aubio cvec of %d elements");
if (format == NULL) {
goto fail;
}
args = PyLong_FromLong(self->length);
if (args == NULL) {
goto fail;
}
// hide actual norm / phas content
result = PyUnicode_Format (format, args);
fail:
Py_XDECREF (format);
Py_XDECREF (args);
return result;
}
PyObject *
Py_cvec_get_norm (Py_cvec * self, void *closure)
{
// we want self->norm to still exist after our caller return it
Py_INCREF(self->norm);
return (PyObject*)(self->norm);
}
PyObject *
Py_cvec_get_phas (Py_cvec * self, void *closure)
{
// we want self->phas to still exist after our caller return it
Py_INCREF(self->phas);
return (PyObject *)(self->phas);
}
static int
Py_cvec_set_norm (Py_cvec * vec, PyObject *input, void * closure)
{
npy_intp length;
if (!PyAubio_IsValidVector(input)) {
return -1;
}
length = PyArray_SIZE ((PyArrayObject *)input);
if (length != vec->length) {
PyErr_Format (PyExc_ValueError,
"input array has length %" NPY_INTP_FMT ", but cvec has length %d", length,
vec->length);
return -1;
}
Py_XDECREF(vec->norm);
vec->norm = input;
Py_INCREF(vec->norm);
return 0;
}
static int
Py_cvec_set_phas (Py_cvec * vec, PyObject *input, void * closure)
{
npy_intp length;
if (!PyAubio_IsValidVector(input)) {
return -1;
}
length = PyArray_SIZE ((PyArrayObject *)input);
if (length != vec->length) {
PyErr_Format (PyExc_ValueError,
"input array has length %" NPY_INTP_FMT ", but cvec has length %d", length,
vec->length);
return -1;
}
Py_XDECREF(vec->phas);
vec->phas = input;
Py_INCREF(vec->phas);
return 0;
}
static PyMemberDef Py_cvec_members[] = {
// TODO remove READONLY flag and define getter/setter
{"length", T_INT, offsetof (Py_cvec, length), READONLY,
"int: Length of `norm` and `phas` vectors."},
{NULL} /* Sentinel */
};
static PyMethodDef Py_cvec_methods[] = {
{NULL}
};
static PyGetSetDef Py_cvec_getseters[] = {
{"norm", (getter)Py_cvec_get_norm, (setter)Py_cvec_set_norm,
"numpy.ndarray: Vector of shape `(length,)` containing the magnitude.",
NULL},
{"phas", (getter)Py_cvec_get_phas, (setter)Py_cvec_set_phas,
"numpy.ndarray: Vector of shape `(length,)` containing the phase.",
NULL},
{NULL} /* sentinel */
};
PyTypeObject Py_cvecType = {
PyVarObject_HEAD_INIT(NULL, 0)
"aubio.cvec", /* tp_name */
sizeof (Py_cvec), /* tp_basicsize */
0, /* tp_itemsize */
(destructor) Py_cvec_del, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc) Py_cvec_repr, /* tp_repr */
0, /* tp_as_number */
0, //&Py_cvec_tp_as_sequence, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
Py_cvec_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
Py_cvec_methods, /* tp_methods */
Py_cvec_members, /* tp_members */
Py_cvec_getseters, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc) Py_cvec_init, /* tp_init */
0, /* tp_alloc */
Py_cvec_new, /* tp_new */
0,
0,
0,
0,
0,
0,
0,
0,
0,
};