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#include <Python.h>
#include <structmember.h>
#include <stdio.h>
#include <atrac3plus_pqf.h>
typedef struct {
PyObject_HEAD;
at3plus_pqf_a_ctx_t ctx;
} AnalyzeCtxObject;
static PyObject *
AnalyzeCtx_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
AnalyzeCtxObject *self;
self = (AnalyzeCtxObject*)type->tp_alloc(type, 0);
if (self == NULL) {
fprintf(stderr, "Unable to allocate analyze context\n");
return NULL;
}
return (PyObject*)self;
}
static int
AnalyzeCtx_init(AnalyzeCtxObject *self, PyObject *args, PyObject *kwds)
{
self->ctx = at3plus_pqf_create_a_ctx();
return 0;
}
static void
AnalyzeCtx_dealloc(AnalyzeCtxObject *self)
{
at3plus_pqf_free_a_ctx(self->ctx);
}
static PyObject* prototype(PyObject* self, PyObject* unused)
{
int i;
const float* proto = at3plus_pqf_get_proto();
PyObject *my_list = PyList_New(0);
if(my_list == NULL) {
return NULL;
}
for (i = 0; i < at3plus_pqf_proto_sz; i++) {
PyObject *o = Py_BuildValue("f", proto[i]);
if(PyList_Append(my_list, o) == -1) {
return NULL;
}
}
return my_list;
}
static PyObject* analyzectx_do(PyObject* self, PyObject* args)
{
int i = 0;
int len = 0;
float* in;
float* out;
AnalyzeCtxObject* ctx;
PyObject *seq;
if (!PyArg_ParseTuple(args, "O", &seq)) {
return NULL;
}
seq = PySequence_Fast(seq, "argument must be iterable");
if (!seq) {
return NULL;
}
len = PySequence_Fast_GET_SIZE(seq);
if (len != at3plus_pqf_frame_sz) {
fprintf(stderr, "wrong frame size, expected: %d, got: %d", (int)at3plus_pqf_frame_sz, len);
return NULL;
}
in = (float*)malloc(len * sizeof(float));
if(!in) {
Py_DECREF(seq);
return PyErr_NoMemory( );
}
for (i = 0; i < len; i++) {
PyObject *fitem;
PyObject *item = PySequence_Fast_GET_ITEM(seq, i);
if(!item) {
Py_DECREF(seq);
free(in);
return NULL;
}
fitem = PyNumber_Float(item);
if(!fitem) {
Py_DECREF(seq);
free(in);
PyErr_SetString(PyExc_TypeError, "all items must be numbers");
return NULL;
}
in[i] = PyFloat_AS_DOUBLE(fitem);
Py_DECREF(fitem);
}
PyObject *my_list = PyList_New(0);
if(my_list == NULL) {
Py_DECREF(seq);
free(in);
return NULL;
}
out = (float*)calloc(at3plus_pqf_frame_sz, sizeof(float));
if (out == NULL) {
Py_DECREF(seq);
free(in);
return NULL;
}
ctx = (AnalyzeCtxObject*)self;
at3plus_pqf_do_analyse(ctx->ctx, in, out);
for (i = 0; i < len; i++) {
PyObject *o = Py_BuildValue("f", out[i]);
if(PyList_Append(my_list, o) == -1) {
Py_DECREF(seq);
free(in);
return NULL;
}
}
free(in);
return my_list;
}
static PyMethodDef methods[] = {
{ "prototype", prototype, METH_NOARGS, "Show atrac3plus pqf filter prototype"},
{ NULL, NULL, 0, NULL }
};
static PyMethodDef AnalyzeCtx_methods[] = {
{"do", (PyCFunction)analyzectx_do, METH_VARARGS, NULL},
{NULL}
};
static PyTypeObject AnalyzeCtxType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pqf.AnalyzeCtx",
.tp_doc = "AnalyzeCtx",
.tp_basicsize = sizeof(AnalyzeCtxObject),
.tp_itemsize = 0,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = AnalyzeCtx_new,
.tp_init = (initproc)AnalyzeCtx_init,
.tp_dealloc = (destructor)AnalyzeCtx_dealloc,
.tp_methods = AnalyzeCtx_methods,
};
static struct PyModuleDef module = {
PyModuleDef_HEAD_INIT,
.m_name = "pqf",
.m_doc = "pqf library test binding",
.m_size = -1,
.m_methods = methods
};
PyMODINIT_FUNC PyInit_pqf(void)
{
PyObject *m;
if (PyType_Ready(&AnalyzeCtxType) < 0)
return NULL;
m = PyModule_Create(&module);
if (m == NULL)
return NULL;
Py_INCREF(&AnalyzeCtxType);
PyModule_AddObject(m, "AnalyzeCtx", (PyObject*)&AnalyzeCtxType);
PyModule_AddIntConstant(m, "frame_sz", at3plus_pqf_frame_sz);
return m;
}
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