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