| /****************************************************************************** |
| * |
| * 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 <ltpf.c> |
| #include "ctypes.h" |
| |
| static PyObject *resample_py(PyObject *m, PyObject *args) |
| { |
| unsigned dt, sr; |
| PyObject *hp50_obj, *x_obj, *y_obj; |
| struct lc3_ltpf_hp50_state hp50; |
| int16_t *x, *y; |
| |
| if (!PyArg_ParseTuple(args, "IIOOO", &dt, &sr, &hp50_obj, &x_obj, &y_obj)) |
| return NULL; |
| |
| CTYPES_CHECK("dt", (unsigned)dt < LC3_NUM_DT); |
| CTYPES_CHECK("sr", (unsigned)sr < LC3_NUM_SRATE); |
| CTYPES_CHECK(NULL, hp50_obj = to_ltpf_hp50_state(hp50_obj, &hp50)); |
| |
| int ns = LC3_NS(dt, sr), nt = LC3_NT(dt); |
| int ny = sizeof((struct lc3_ltpf_analysis){ }.x_12k8) / sizeof(int16_t); |
| int n = dt == LC3_DT_7M5 ? 96 : 128; |
| |
| CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_INT16, ns+nt, &x)); |
| CTYPES_CHECK("y", y_obj = to_1d_ptr(y_obj, NPY_INT16, ny, &y)); |
| |
| resample_12k8[sr](&hp50, x + nt, y + (ny - n), n); |
| |
| from_ltpf_hp50_state(hp50_obj, &hp50); |
| return Py_BuildValue("O", y_obj); |
| } |
| |
| static PyObject *analyse_py(PyObject *m, PyObject *args) |
| { |
| PyObject *ltpf_obj, *x_obj; |
| unsigned dt, sr; |
| struct lc3_ltpf_analysis ltpf; |
| struct lc3_ltpf_data data = { 0 }; |
| int16_t *x; |
| |
| if (!PyArg_ParseTuple(args, "IIOO", &dt, &sr, <pf_obj, &x_obj)) |
| return NULL; |
| |
| CTYPES_CHECK("dt", dt < LC3_NUM_DT); |
| CTYPES_CHECK("sr", sr < LC3_NUM_SRATE); |
| CTYPES_CHECK(NULL, ltpf_obj = to_ltpf_analysis(ltpf_obj, <pf)); |
| |
| int ns = LC3_NS(dt, sr), nt = LC3_NT(sr); |
| |
| CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_INT16, ns+nt, &x)); |
| |
| int pitch_present = |
| lc3_ltpf_analyse(dt, sr, <pf, x + nt, &data); |
| |
| from_ltpf_analysis(ltpf_obj, <pf); |
| return Py_BuildValue("iN", pitch_present, new_ltpf_data(&data)); |
| } |
| |
| static PyObject *synthesize_py(PyObject *m, PyObject *args) |
| { |
| PyObject *ltpf_obj, *data_obj, *x_obj; |
| struct lc3_ltpf_synthesis ltpf; |
| struct lc3_ltpf_data data; |
| bool pitch_present; |
| unsigned dt, sr; |
| int nbytes; |
| float *x; |
| |
| if (!PyArg_ParseTuple(args, "IIiOOO", |
| &dt, &sr, &nbytes, <pf_obj, &data_obj, &x_obj)) |
| return NULL; |
| |
| CTYPES_CHECK("dt", dt < LC3_NUM_DT); |
| CTYPES_CHECK("sr", sr < LC3_NUM_SRATE); |
| CTYPES_CHECK("nbytes", nbytes >= 20 && nbytes <= 400); |
| CTYPES_CHECK(NULL, ltpf_obj = to_ltpf_synthesis(ltpf_obj, <pf)); |
| |
| if ((pitch_present = (data_obj != Py_None))) |
| CTYPES_CHECK(NULL, data_obj = to_ltpf_data(data_obj, &data)); |
| |
| int ns = LC3_NS(dt,sr), nd = 18 * LC3_SRATE_KHZ(sr); |
| |
| CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_FLOAT, nd+ns, &x)); |
| |
| lc3_ltpf_synthesize(dt, sr, nbytes, |
| <pf, pitch_present ? &data : NULL, x, x + nd); |
| |
| from_ltpf_synthesis(ltpf_obj, <pf); |
| return Py_BuildValue("O", x_obj); |
| } |
| |
| static PyObject *get_nbits_py(PyObject *m, PyObject *args) |
| { |
| int pitch_present; |
| |
| if (!PyArg_ParseTuple(args, "i", &pitch_present)) |
| return NULL; |
| |
| int nbits = lc3_ltpf_get_nbits(pitch_present); |
| |
| return Py_BuildValue("i", nbits); |
| } |
| |
| static PyMethodDef methods[] = { |
| { "ltpf_resample" , resample_py , METH_VARARGS }, |
| { "ltpf_analyse" , analyse_py , METH_VARARGS }, |
| { "ltpf_synthesize", synthesize_py, METH_VARARGS }, |
| { "ltpf_get_nbits" , get_nbits_py , METH_VARARGS }, |
| { NULL }, |
| }; |
| |
| PyMODINIT_FUNC lc3_ltpf_py_init(PyObject *m) |
| { |
| import_array(); |
| |
| PyModule_AddFunctions(m, methods); |
| |
| return m; |
| } |