1 // ----------------------------------------------------------------------------
2 //
3 // Copyright (C) 2008-2020 Fons Adriaensen <fons@linuxaudio.org>
4 //
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; either version 3 of the License, or
8 // (at your option) any later version.
9 //
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with this program. If not, see <http://www.gnu.org/licenses/>.
17 //
18 // ----------------------------------------------------------------------------
19
20
21 #include <Python.h>
22 #include "jkmeter.h"
23
24
25 static const char *capslabel = "Jkmeter";
26
27
checkbuff(PyObject * P,int nchan)28 static float *checkbuff (PyObject *P, int nchan)
29 {
30 Py_buffer B;
31 float *F = 0;
32
33 if ( PyObject_CheckBuffer (P)
34 && (PyObject_GetBuffer(P, &B, PyBUF_FULL) == 0)
35 && (B.ndim == 1)
36 && (B.shape [0] == nchan)
37 && (B.strides [0] == sizeof (float))) F = (float *)(B.buf);
38 // The Python code MUS NOT DELETE this object !!
39 PyBuffer_Release (&B);
40 return F;
41 }
42
43
destroy(PyObject * P)44 extern "C" void destroy (PyObject *P)
45 {
46 delete (Jkmeter *) PyCapsule_GetPointer (P, capslabel);
47 }
48
49
makecaps(PyObject * self,PyObject * args)50 extern "C" PyObject* makecaps (PyObject *self, PyObject *args)
51 {
52 Jkmeter *J;
53 PyObject *P, *Prms, *Ppks;
54 const char *client_name;
55 const char *server_name;
56 int nchan;
57 float *rms;
58 float *pks;
59
60 if (! PyArg_ParseTuple(args, "OsziOO", &P, &client_name, &server_name, &nchan, &Prms, &Ppks)) return 0;
61 rms = checkbuff (Prms, nchan);
62 pks = checkbuff (Ppks, nchan);
63 if (!rms || !pks) return 0;
64 J = new Jkmeter (client_name, server_name, nchan, rms, pks);
65 return Py_BuildValue ("NN",
66 PyCapsule_New (J, capslabel, destroy),
67 PyCapsule_New (dynamic_cast<Jclient *>(J), "Jclient", 0));
68 }
69
70
get_levels(PyObject * self,PyObject * args)71 extern "C" PyObject* get_levels (PyObject *self, PyObject *args)
72 {
73 Jkmeter *J;
74 PyObject *P;
75
76 if (! PyArg_ParseTuple(args, "O", &P)) return 0;
77 J = (Jkmeter *) PyCapsule_GetPointer (P, capslabel);
78 return Py_BuildValue ("i", J->get_levels ());
79 }
80
81
82 static PyMethodDef JackKmeterMethods[] =
83 {
84 {"makecaps", makecaps, METH_VARARGS, "Create object capsules."},
85 {"get_levels", get_levels, METH_VARARGS, "Get current state and levels."},
86 {NULL, NULL, 0, NULL}
87 };
88
89
90
91 #if PY_VERSION_HEX >= 0x03000000
92
93 static struct PyModuleDef JackKmeterModule =
94 {
95 PyModuleDef_HEAD_INIT,
96 "jackkmeter_ext",
97 NULL,
98 -1,
99 JackKmeterMethods
100 };
101
PyInit_jackkmeter_ext(void)102 PyMODINIT_FUNC PyInit_jackkmeter_ext(void)
103 {
104 return PyModule_Create(&JackKmeterModule);
105 }
106
107 #else
108
initjackkmeter_ext(void)109 PyMODINIT_FUNC initjackkmeter_ext(void)
110 {
111 (void) Py_InitModule("jackkmeter_ext", JackKmeterMethods);
112 }
113
114 #endif
115