ref: 7a2666f1213f55dc8fb22e086eddc2d8771a8f06
dir: /python/ext/py-source.c/
#include "aubio-types.h"
typedef struct
{
PyObject_HEAD
aubio_source_t * o;
char_t* uri;
uint_t samplerate;
uint_t channels;
uint_t hop_size;
uint_t duration;
PyObject *read_to;
fvec_t c_read_to;
PyObject *mread_to;
fmat_t c_mread_to;
} Py_source;
static char Py_source_doc[] = ""
" __new__(path, samplerate = 0, hop_size = 512, channels = 1)\n"
"\n"
" Create a new source, opening the given path for reading.\n"
"\n"
" Examples\n"
" --------\n"
"\n"
" Create a new source, using the original samplerate, with hop_size = 512:\n"
"\n"
" >>> source('/tmp/t.wav')\n"
"\n"
" Create a new source, resampling the original to 8000Hz:\n"
"\n"
" >>> source('/tmp/t.wav', samplerate = 8000)\n"
"\n"
" Create a new source, resampling it at 32000Hz, hop_size = 32:\n"
"\n"
" >>> source('/tmp/t.wav', samplerate = 32000, hop_size = 32)\n"
"\n"
" Create a new source, using its original samplerate:\n"
"\n"
" >>> source('/tmp/t.wav', samplerate = 0)\n"
"\n"
" __call__()\n"
" vec, read = x() <==> vec, read = x.do()\n"
"\n"
" Read vector from source.\n"
"\n"
" See also\n"
" --------\n"
" aubio.source.do\n"
"\n";
static char Py_source_get_samplerate_doc[] = ""
"x.get_samplerate() -> source samplerate\n"
"\n"
"Get samplerate of source.";
static char Py_source_get_channels_doc[] = ""
"x.get_channels() -> number of channels\n"
"\n"
"Get number of channels in source.";
static char Py_source_do_doc[] = ""
"vec, read = x.do() <==> vec, read = x()\n"
"\n"
"Read monophonic vector from source.";
static char Py_source_do_multi_doc[] = ""
"mat, read = x.do_multi()\n"
"\n"
"Read polyphonic vector from source.";
static char Py_source_close_doc[] = ""
"x.close()\n"
"\n"
"Close this source now.";
static char Py_source_seek_doc[] = ""
"x.seek(position)\n"
"\n"
"Seek to resampled frame position.";
static PyObject *
Py_source_new (PyTypeObject * pytype, PyObject * args, PyObject * kwds)
{
Py_source *self;
char_t* uri = NULL;
uint_t samplerate = 0;
uint_t hop_size = 0;
uint_t channels = 0;
static char *kwlist[] = { "uri", "samplerate", "hop_size", "channels", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kwds, "|sIII", kwlist,
&uri, &samplerate, &hop_size, &channels)) {
return NULL;
}
self = (Py_source *) pytype->tp_alloc (pytype, 0);
if (self == NULL) {
return NULL;
}
self->uri = NULL;
if (uri != NULL) {
self->uri = (char_t *)malloc(sizeof(char_t) * (strnlen(uri, PATH_MAX) + 1));
strncpy(self->uri, uri, strnlen(uri, PATH_MAX) + 1);
}
self->samplerate = 0;
if ((sint_t)samplerate > 0) {
self->samplerate = samplerate;
} else if ((sint_t)samplerate < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative value for samplerate");
return NULL;
}
self->hop_size = Py_default_vector_length / 2;
if ((sint_t)hop_size > 0) {
self->hop_size = hop_size;
} else if ((sint_t)hop_size < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative value for hop_size");
return NULL;
}
self->channels = 1;
if ((sint_t)channels >= 0) {
self->channels = channels;
} else if ((sint_t)channels < 0) {
PyErr_SetString (PyExc_ValueError,
"can not use negative value for channels");
return NULL;
}
return (PyObject *) self;
}
static int
Py_source_init (Py_source * self, PyObject * args, PyObject * kwds)
{
self->o = new_aubio_source ( self->uri, self->samplerate, self->hop_size );
if (self->o == NULL) {
// PyErr_Format(PyExc_RuntimeError, ...) was set above by new_ which called
// AUBIO_ERR when failing
return -1;
}
self->samplerate = aubio_source_get_samplerate ( self->o );
if (self->channels == 0) {
self->channels = aubio_source_get_channels ( self->o );
}
self->duration = aubio_source_get_duration ( self->o );
self->read_to = new_py_fvec(self->hop_size);
self->mread_to = new_py_fmat(self->channels, self->hop_size);
return 0;
}
static void
Py_source_del (Py_source *self, PyObject *unused)
{
if (self->o) {
del_aubio_source(self->o);
free(self->c_mread_to.data);
}
if (self->uri) {
free(self->uri);
}
Py_XDECREF(self->read_to);
Py_XDECREF(self->mread_to);
Py_TYPE(self)->tp_free((PyObject *) self);
}
/* function Py_source_do */
static PyObject *
Py_source_do(Py_source * self, PyObject * args)
{
PyObject *outputs;
uint_t read;
read = 0;
Py_INCREF(self->read_to);
if (!PyAubio_ArrayToCFvec(self->read_to, &(self->c_read_to))) {
return NULL;
}
/* compute _do function */
aubio_source_do (self->o, &(self->c_read_to), &read);
outputs = PyTuple_New(2);
PyTuple_SetItem( outputs, 0, self->read_to );
PyTuple_SetItem( outputs, 1, (PyObject *)PyLong_FromLong(read));
return outputs;
}
/* function Py_source_do_multi */
static PyObject *
Py_source_do_multi(Py_source * self, PyObject * args)
{
PyObject *outputs;
uint_t read;
read = 0;
Py_INCREF(self->mread_to);
if (!PyAubio_ArrayToCFmat(self->mread_to, &(self->c_mread_to))) {
return NULL;
}
/* compute _do function */
aubio_source_do_multi (self->o, &(self->c_mread_to), &read);
outputs = PyTuple_New(2);
PyTuple_SetItem( outputs, 0, self->mread_to);
PyTuple_SetItem( outputs, 1, (PyObject *)PyLong_FromLong(read));
return outputs;
}
static PyMemberDef Py_source_members[] = {
{"uri", T_STRING, offsetof (Py_source, uri), READONLY,
"path at which the source was created"},
{"samplerate", T_INT, offsetof (Py_source, samplerate), READONLY,
"samplerate at which the source is viewed"},
{"channels", T_INT, offsetof (Py_source, channels), READONLY,
"number of channels found in the source"},
{"hop_size", T_INT, offsetof (Py_source, hop_size), READONLY,
"number of consecutive frames that will be read at each do or do_multi call"},
{"duration", T_INT, offsetof (Py_source, duration), READONLY,
"total number of frames in the source (estimated)"},
{ NULL } // sentinel
};
static PyObject *
Pyaubio_source_get_samplerate (Py_source *self, PyObject *unused)
{
uint_t tmp = aubio_source_get_samplerate (self->o);
return (PyObject *)PyLong_FromLong (tmp);
}
static PyObject *
Pyaubio_source_get_channels (Py_source *self, PyObject *unused)
{
uint_t tmp = aubio_source_get_channels (self->o);
return (PyObject *)PyLong_FromLong (tmp);
}
static PyObject *
Pyaubio_source_close (Py_source *self, PyObject *unused)
{
if (aubio_source_close(self->o) != 0) return NULL;
Py_RETURN_NONE;
}
static PyObject *
Pyaubio_source_seek (Py_source *self, PyObject *args)
{
uint_t err = 0;
int position;
if (!PyArg_ParseTuple (args, "I", &position)) {
return NULL;
}
if (position < 0) {
PyErr_Format(PyExc_ValueError,
"error when seeking in source: can not seek to negative value %d",
position);
return NULL;
}
err = aubio_source_seek(self->o, position);
if (err != 0) {
PyErr_SetString (PyExc_ValueError,
"error when seeking in source");
return NULL;
}
Py_RETURN_NONE;
}
static char Pyaubio_source_enter_doc[] = "";
static PyObject* Pyaubio_source_enter(Py_source *self, PyObject *unused) {
Py_INCREF(self);
return (PyObject*)self;
}
static char Pyaubio_source_exit_doc[] = "";
static PyObject* Pyaubio_source_exit(Py_source *self, PyObject *unused) {
return Pyaubio_source_close(self, unused);
}
static PyObject* Pyaubio_source_iter(PyObject *self) {
Py_INCREF(self);
return (PyObject*)self;
}
static PyObject* Pyaubio_source_iter_next(Py_source *self) {
PyObject *done, *size;
if (self->channels == 1) {
done = Py_source_do(self, NULL);
} else {
done = Py_source_do_multi(self, NULL);
}
if (!PyTuple_Check(done)) {
PyErr_Format(PyExc_ValueError,
"error when reading source: not opened?");
return NULL;
}
size = PyTuple_GetItem(done, 1);
if (size != NULL && PyLong_Check(size)) {
if (PyLong_AsLong(size) == (long)self->hop_size) {
PyObject *vec = PyTuple_GetItem(done, 0);
return vec;
} else if (PyLong_AsLong(size) > 0) {
// short read, return a shorter array
PyArrayObject *shortread = (PyArrayObject*)PyTuple_GetItem(done, 0);
PyArray_Dims newdims;
PyObject *reshaped;
newdims.len = PyArray_NDIM(shortread);
newdims.ptr = PyArray_DIMS(shortread);
// mono or multiple channels?
if (newdims.len == 1) {
newdims.ptr[0] = PyLong_AsLong(size);
} else {
newdims.ptr[1] = PyLong_AsLong(size);
}
reshaped = PyArray_Newshape(shortread, &newdims, NPY_CORDER);
Py_DECREF(shortread);
return reshaped;
} else {
PyErr_SetNone(PyExc_StopIteration);
return NULL;
}
} else {
PyErr_SetNone(PyExc_StopIteration);
return NULL;
}
}
static PyMethodDef Py_source_methods[] = {
{"get_samplerate", (PyCFunction) Pyaubio_source_get_samplerate,
METH_NOARGS, Py_source_get_samplerate_doc},
{"get_channels", (PyCFunction) Pyaubio_source_get_channels,
METH_NOARGS, Py_source_get_channels_doc},
{"do", (PyCFunction) Py_source_do,
METH_NOARGS, Py_source_do_doc},
{"do_multi", (PyCFunction) Py_source_do_multi,
METH_NOARGS, Py_source_do_multi_doc},
{"close", (PyCFunction) Pyaubio_source_close,
METH_NOARGS, Py_source_close_doc},
{"seek", (PyCFunction) Pyaubio_source_seek,
METH_VARARGS, Py_source_seek_doc},
{"__enter__", (PyCFunction)Pyaubio_source_enter, METH_NOARGS,
Pyaubio_source_enter_doc},
{"__exit__", (PyCFunction)Pyaubio_source_exit, METH_VARARGS,
Pyaubio_source_exit_doc},
{NULL} /* sentinel */
};
PyTypeObject Py_sourceType = {
PyVarObject_HEAD_INIT (NULL, 0)
"aubio.source",
sizeof (Py_source),
0,
(destructor) Py_source_del,
0,
0,
0,
0,
0,
0,
0,
0,
0,
(ternaryfunc)Py_source_do,
0,
0,
0,
0,
Py_TPFLAGS_DEFAULT,
Py_source_doc,
0,
0,
0,
0,
Pyaubio_source_iter,
(unaryfunc)Pyaubio_source_iter_next,
Py_source_methods,
Py_source_members,
0,
0,
0,
0,
0,
0,
(initproc) Py_source_init,
0,
Py_source_new,
0,
0,
0,
0,
0,
0,
0,
0,
0,
};