ref: a300cef4865f95ab1a96ad69ff39b25fc14ff195
dir: /interfaces/python/py-fvec.c/
#include "aubio-types.h"
/* fvec type definition
class fvec():
def __init__(self, length = 1024, channels = 1):
self.length = length
self.channels = channels
self.data = array(length, channels)
*/
static char Py_fvec_doc[] = "fvec object";
static PyObject *
Py_fvec_new (PyTypeObject * type, PyObject * args, PyObject * kwds)
{
int length= 0, channels = 0;
Py_fvec *self;
static char *kwlist[] = { "length", "channels", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kwds, "|II", kwlist,
&length, &channels)) {
return NULL;
}
self = (Py_fvec *) type->tp_alloc (type, 0);
self->length = Py_default_vector_length;
self->channels = Py_default_vector_channels;
if (self == NULL) {
return NULL;
}
if (length > 0) {
self->length = length;
} else if (length < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative number of elements");
return NULL;
}
if (channels > 0) {
self->channels = channels;
} else if (channels < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative number of channels");
return NULL;
}
return (PyObject *) self;
}
static int
Py_fvec_init (Py_fvec * self, PyObject * args, PyObject * kwds)
{
self->o = new_fvec (self->length, self->channels);
if (self->o == NULL) {
return -1;
}
return 0;
}
static void
Py_fvec_del (Py_fvec * self)
{
del_fvec (self->o);
self->ob_type->tp_free ((PyObject *) self);
}
static PyObject *
Py_fvec_repr (Py_fvec * self, PyObject * unused)
{
PyObject *format = NULL;
PyObject *args = NULL;
PyObject *result = NULL;
format = PyString_FromString ("aubio fvec of %d elements with %d channels");
if (format == NULL) {
goto fail;
}
args = Py_BuildValue ("II", self->length, self->channels);
if (args == NULL) {
goto fail;
}
fvec_print ( self->o );
result = PyString_Format (format, args);
fail:
Py_XDECREF (format);
Py_XDECREF (args);
return result;
}
Py_fvec *
PyAubio_ArrayToFvec (PyObject *input) {
PyObject *array;
Py_fvec *vec;
uint_t i;
if (input == NULL) {
PyErr_SetString (PyExc_ValueError, "input array is not a python object");
goto fail;
}
// parsing input object into a Py_fvec
if (PyObject_TypeCheck (input, &Py_fvecType)) {
// input is an fvec, nothing else to do
vec = (Py_fvec *) input;
} else if (PyArray_Check(input)) {
// we got an array, convert it to an fvec
if (PyArray_NDIM (input) == 0) {
PyErr_SetString (PyExc_ValueError, "input array is a scalar");
goto fail;
} else if (PyArray_NDIM (input) > 2) {
PyErr_SetString (PyExc_ValueError,
"input array has more than two dimensions");
goto fail;
}
if (!PyArray_ISFLOAT (input)) {
PyErr_SetString (PyExc_ValueError, "input array should be float");
goto fail;
#if AUBIO_DO_CASTING
} else if (PyArray_TYPE (input) != AUBIO_NPY_SMPL) {
// input data type is not float32, casting
array = PyArray_Cast ( (PyArrayObject*) input, AUBIO_NPY_SMPL);
if (array == NULL) {
PyErr_SetString (PyExc_IndexError, "failed converting to AUBIO_NPY_SMPL");
goto fail;
}
#else
} else if (PyArray_TYPE (input) != AUBIO_NPY_SMPL) {
PyErr_SetString (PyExc_ValueError, "input array should be float32");
goto fail;
#endif
} else {
// input data type is float32, nothing else to do
array = input;
}
// create a new fvec object
vec = (Py_fvec*) PyObject_New (Py_fvec, &Py_fvecType);
if (PyArray_NDIM (array) == 1) {
vec->channels = 1;
vec->length = PyArray_SIZE (array);
} else {
vec->channels = PyArray_DIM (array, 0);
vec->length = PyArray_DIM (array, 1);
}
// no need to really allocate fvec, just its struct member
// vec->o = new_fvec (vec->length, vec->channels);
vec->o = (fvec_t *)malloc(sizeof(fvec_t));
vec->o->length = vec->length; vec->o->channels = vec->channels;
vec->o->data = (smpl_t**)malloc(vec->o->channels * sizeof(smpl_t*));
// hat data[i] point to array line
for (i = 0; i < vec->channels; i++) {
vec->o->data[i] = (smpl_t *) PyArray_GETPTR1 (array, i);
}
} else {
PyErr_SetString (PyExc_ValueError, "can only accept array or fvec as input");
return NULL;
}
return vec;
fail:
return NULL;
}
PyObject *
PyAubio_FvecToArray (Py_fvec * self)
{
PyObject *array = NULL;
if (self->channels == 1) {
npy_intp dims[] = { self->length, 1 };
array = PyArray_SimpleNewFromData (1, dims, AUBIO_NPY_SMPL, self->o->data[0]);
} else {
uint_t i;
npy_intp dims[] = { self->length, 1 };
PyObject *concat = PyList_New (0), *tmp = NULL;
for (i = 0; i < self->channels; i++) {
tmp = PyArray_SimpleNewFromData (1, dims, AUBIO_NPY_SMPL, self->o->data[i]);
PyList_Append (concat, tmp);
Py_DECREF (tmp);
}
array = PyArray_FromObject (concat, AUBIO_NPY_SMPL, 2, 2);
Py_DECREF (concat);
}
return array;
}
static Py_ssize_t
Py_fvec_getchannels (Py_fvec * self)
{
return self->channels;
}
static PyObject *
Py_fvec_getitem (Py_fvec * self, Py_ssize_t index)
{
PyObject *array;
if (index < 0 || index >= self->channels) {
PyErr_SetString (PyExc_IndexError, "no such channel");
return NULL;
}
npy_intp dims[] = { self->length, 1 };
array = PyArray_SimpleNewFromData (1, dims, AUBIO_NPY_SMPL, self->o->data[index]);
return array;
}
static int
Py_fvec_setitem (Py_fvec * self, Py_ssize_t index, PyObject * o)
{
PyObject *array;
if (index < 0 || index >= self->channels) {
PyErr_SetString (PyExc_IndexError, "no such channel");
return -1;
}
array = PyArray_FROM_OT (o, AUBIO_NPY_SMPL);
if (array == NULL) {
PyErr_SetString (PyExc_ValueError, "should be an array of float");
goto fail;
}
if (PyArray_NDIM (array) != 1) {
PyErr_SetString (PyExc_ValueError, "should be a one-dimensional array");
goto fail;
}
if (PyArray_SIZE (array) != self->length) {
PyErr_SetString (PyExc_ValueError,
"should be an array of same length as target fvec");
goto fail;
}
self->o->data[index] = (smpl_t *) PyArray_GETPTR1 (array, 0);
return 0;
fail:
return -1;
}
static PyMemberDef Py_fvec_members[] = {
// TODO remove READONLY flag and define getter/setter
{"length", T_INT, offsetof (Py_fvec, length), READONLY,
"length attribute"},
{"channels", T_INT, offsetof (Py_fvec, channels), READONLY,
"channels attribute"},
{NULL} /* Sentinel */
};
static PyMethodDef Py_fvec_methods[] = {
{"__array__", (PyCFunction) PyAubio_FvecToArray, METH_NOARGS,
"Returns the first channel as a numpy array."},
{NULL}
};
static PySequenceMethods Py_fvec_tp_as_sequence = {
(lenfunc) Py_fvec_getchannels, /* sq_length */
0, /* sq_concat */
0, /* sq_repeat */
(ssizeargfunc) Py_fvec_getitem, /* sq_item */
0, /* sq_slice */
(ssizeobjargproc) Py_fvec_setitem, /* sq_ass_item */
0, /* sq_ass_slice */
0, /* sq_contains */
0, /* sq_inplace_concat */
0, /* sq_inplace_repeat */
};
PyTypeObject Py_fvecType = {
PyObject_HEAD_INIT (NULL)
0, /* ob_size */
"aubio.fvec", /* tp_name */
sizeof (Py_fvec), /* tp_basicsize */
0, /* tp_itemsize */
(destructor) Py_fvec_del, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc) Py_fvec_repr, /* tp_repr */
0, /* tp_as_number */
&Py_fvec_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_fvec_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
Py_fvec_methods, /* tp_methods */
Py_fvec_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_fvec_init, /* tp_init */
0, /* tp_alloc */
Py_fvec_new, /* tp_new */
};