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/******************************************************************************
*
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#include <Python.h>
#include <numpy/ndarrayobject.h>
#include <mdct.c>
#include "ctypes.h"
static PyObject *mdct_forward_py(PyObject *m, PyObject *args)
{
PyObject *x_obj, *xd_obj, *y_obj, *d_obj;
enum lc3_dt dt;
enum lc3_srate sr;
float *x, *xd, *y, *d;
if (!PyArg_ParseTuple(args, "iiOO", &dt, &sr, &x_obj, &xd_obj))
return NULL;
CTYPES_CHECK("dt", (unsigned)dt < LC3_NUM_DT);
CTYPES_CHECK("sr", (unsigned)sr < LC3_NUM_SRATE);
int ns = LC3_NS(dt, sr), nd = LC3_ND(dt, sr);
CTYPES_CHECK("x", to_1d_ptr(x_obj, NPY_FLOAT, ns, &x));
CTYPES_CHECK("xd", to_1d_ptr(xd_obj, NPY_FLOAT, nd, &xd));
d_obj = new_1d_ptr(NPY_FLOAT, nd, &d);
y_obj = new_1d_ptr(NPY_FLOAT, ns, &y);
memcpy(d, xd, nd * sizeof(float));
lc3_mdct_forward(dt, sr, sr, x, d, y);
return Py_BuildValue("NN", y_obj, d_obj);
}
static PyObject *mdct_inverse_py(PyObject *m, PyObject *args)
{
PyObject *x_obj, *xd_obj, *d_obj, *y_obj;
enum lc3_dt dt;
enum lc3_srate sr;
float *x, *xd, *d, *y;
if (!PyArg_ParseTuple(args, "iiOO", &dt, &sr, &x_obj, &xd_obj))
return NULL;
CTYPES_CHECK("dt", (unsigned)dt < LC3_NUM_DT);
CTYPES_CHECK("sr", (unsigned)sr < LC3_NUM_SRATE);
int ns = LC3_NS(dt, sr), nd = LC3_ND(dt, sr);
CTYPES_CHECK("x", to_1d_ptr(x_obj, NPY_FLOAT, ns, &x));
CTYPES_CHECK("xd", to_1d_ptr(xd_obj, NPY_FLOAT, nd, &xd));
d_obj = new_1d_ptr(NPY_FLOAT, nd, &d);
y_obj = new_1d_ptr(NPY_FLOAT, ns, &y);
memcpy(d, xd, nd * sizeof(float));
lc3_mdct_inverse(dt, sr, sr, x, d, y);
return Py_BuildValue("NN", y_obj, d_obj);
}
static PyMethodDef methods[] = {
{ "mdct_forward", mdct_forward_py, METH_VARARGS },
{ "mdct_inverse", mdct_inverse_py, METH_VARARGS },
{ NULL },
};
PyMODINIT_FUNC lc3_mdct_py_init(PyObject *m)
{
import_array();
PyModule_AddFunctions(m, methods);
return m;
}
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