1 /****************************************************************************** 2 * 3 * Copyright 2022 Google LLC 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <Python.h> 20 #include <numpy/ndarrayobject.h> 21 22 #include <ltpf.c> 23 #include "ctypes.h" 24 25 static PyObject *resample_py(PyObject *m, PyObject *args) 26 { 27 unsigned dt, sr; 28 PyObject *hp50_obj, *x_obj, *y_obj; 29 struct lc3_ltpf_hp50_state hp50; 30 int16_t *x, *y; 31 32 if (!PyArg_ParseTuple(args, "IIOOO", &dt, &sr, &hp50_obj, &x_obj, &y_obj)) 33 return NULL; 34 35 CTYPES_CHECK("dt", (unsigned)dt < LC3_NUM_DT); 36 CTYPES_CHECK("sr", (unsigned)sr < LC3_NUM_SRATE); 37 CTYPES_CHECK(NULL, hp50_obj = to_ltpf_hp50_state(hp50_obj, &hp50)); 38 39 int ns = LC3_NS(dt, sr), nt = LC3_NT(dt); 40 int ny = sizeof((struct lc3_ltpf_analysis){ }.x_12k8) / sizeof(int16_t); 41 int n = dt == LC3_DT_7M5 ? 96 : 128; 42 43 CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_INT16, ns+nt, &x)); 44 CTYPES_CHECK("y", y_obj = to_1d_ptr(y_obj, NPY_INT16, ny, &y)); 45 46 resample_12k8[sr](&hp50, x + nt, y + (ny - n), n); 47 48 from_ltpf_hp50_state(hp50_obj, &hp50); 49 return Py_BuildValue("O", y_obj); 50 } 51 52 static PyObject *analyse_py(PyObject *m, PyObject *args) 53 { 54 PyObject *ltpf_obj, *x_obj; 55 unsigned dt, sr; 56 struct lc3_ltpf_analysis ltpf; 57 struct lc3_ltpf_data data = { 0 }; 58 int16_t *x; 59 60 if (!PyArg_ParseTuple(args, "IIOO", &dt, &sr, <pf_obj, &x_obj)) 61 return NULL; 62 63 CTYPES_CHECK("dt", dt < LC3_NUM_DT); 64 CTYPES_CHECK("sr", sr < LC3_NUM_SRATE); 65 CTYPES_CHECK(NULL, ltpf_obj = to_ltpf_analysis(ltpf_obj, <pf)); 66 67 int ns = LC3_NS(dt, sr), nt = LC3_NT(sr); 68 69 CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_INT16, ns+nt, &x)); 70 71 int pitch_present = 72 lc3_ltpf_analyse(dt, sr, <pf, x + nt, &data); 73 74 from_ltpf_analysis(ltpf_obj, <pf); 75 return Py_BuildValue("iN", pitch_present, new_ltpf_data(&data)); 76 } 77 78 static PyObject *synthesize_py(PyObject *m, PyObject *args) 79 { 80 PyObject *ltpf_obj, *data_obj, *x_obj; 81 struct lc3_ltpf_synthesis ltpf; 82 struct lc3_ltpf_data data; 83 bool pitch_present; 84 unsigned dt, sr; 85 int nbytes; 86 float *x; 87 88 if (!PyArg_ParseTuple(args, "IIiOOO", 89 &dt, &sr, &nbytes, <pf_obj, &data_obj, &x_obj)) 90 return NULL; 91 92 CTYPES_CHECK("dt", dt < LC3_NUM_DT); 93 CTYPES_CHECK("sr", sr < LC3_NUM_SRATE); 94 CTYPES_CHECK("nbytes", nbytes >= 20 && nbytes <= 400); 95 CTYPES_CHECK(NULL, ltpf_obj = to_ltpf_synthesis(ltpf_obj, <pf)); 96 97 if ((pitch_present = (data_obj != Py_None))) 98 CTYPES_CHECK(NULL, data_obj = to_ltpf_data(data_obj, &data)); 99 100 int ns = LC3_NS(dt,sr), nd = 18 * LC3_SRATE_KHZ(sr); 101 102 CTYPES_CHECK("x", x_obj = to_1d_ptr(x_obj, NPY_FLOAT, nd+ns, &x)); 103 104 lc3_ltpf_synthesize(dt, sr, nbytes, 105 <pf, pitch_present ? &data : NULL, x, x + nd); 106 107 from_ltpf_synthesis(ltpf_obj, <pf); 108 return Py_BuildValue("O", x_obj); 109 } 110 111 static PyObject *get_nbits_py(PyObject *m, PyObject *args) 112 { 113 int pitch_present; 114 115 if (!PyArg_ParseTuple(args, "i", &pitch_present)) 116 return NULL; 117 118 int nbits = lc3_ltpf_get_nbits(pitch_present); 119 120 return Py_BuildValue("i", nbits); 121 } 122 123 static PyMethodDef methods[] = { 124 { "ltpf_resample" , resample_py , METH_VARARGS }, 125 { "ltpf_analyse" , analyse_py , METH_VARARGS }, 126 { "ltpf_synthesize", synthesize_py, METH_VARARGS }, 127 { "ltpf_get_nbits" , get_nbits_py , METH_VARARGS }, 128 { NULL }, 129 }; 130 131 PyMODINIT_FUNC lc3_ltpf_py_init(PyObject *m) 132 { 133 import_array(); 134 135 PyModule_AddFunctions(m, methods); 136 137 return m; 138 } 139