ref: c8b52aba3554a5c1c13759497a66c71d9f014b05
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, };