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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2019 Rene Staffen | |
5 | ## | |
6 | ## This program is free software; you can redistribute it and/or modify | |
7 | ## it under the terms of the GNU General Public License as published by | |
8 | ## the Free Software Foundation; either version 2 of the License, or | |
9 | ## (at your option) any later version. | |
10 | ## | |
11 | ## This program is distributed in the hope that it will be useful, | |
12 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ## GNU General Public License for more details. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
17 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | ## | |
19 | ||
20 | ''' | |
21 | Python binding for the IRMP library. | |
22 | ''' | |
23 | ||
24 | import ctypes | |
25 | import platform | |
26 | ||
27 | class IrmpLibrary: | |
28 | ''' | |
29 | Library instance for an infrared protocol detector. | |
30 | ''' | |
31 | ||
32 | class ResultData(ctypes.Structure): | |
33 | _fields_ = [ | |
34 | ( 'protocol', ctypes.c_uint32, ), | |
35 | ( 'protocol_name', ctypes.c_char_p, ), | |
36 | ( 'address', ctypes.c_uint32, ), | |
37 | ( 'command', ctypes.c_uint32, ), | |
38 | ( 'flags', ctypes.c_uint32, ), | |
39 | ( 'start_sample', ctypes.c_uint32, ), | |
40 | ( 'end_sample', ctypes.c_uint32, ), | |
41 | ] | |
42 | ||
43 | FLAG_REPETITION = 1 << 0 | |
44 | ||
45 | def _library_filename(self): | |
46 | ''' | |
47 | Determine the library filename depending on the platform. | |
48 | ''' | |
49 | ||
50 | if platform.uname()[0] == 'Linux': | |
51 | return 'libirmp.so' | |
52 | # TODO Add support for more platforms. | |
53 | return 'irmp.dll' | |
54 | ||
55 | def __init__(self): | |
56 | ''' | |
57 | Create a library instance. | |
58 | ''' | |
59 | ||
60 | # Load the library. Lookup routines, declare their prototypes. | |
61 | filename = self._library_filename() | |
62 | self._lib = ctypes.cdll.LoadLibrary(filename) | |
63 | ||
64 | self._lib.irmp_get_sample_rate.restype = ctypes.c_uint32 | |
65 | self._lib.irmp_get_sample_rate.argtypes = [] | |
66 | ||
67 | self._lib.irmp_reset_state.restype = None | |
68 | self._lib.irmp_reset_state.argtypes = [] | |
69 | ||
70 | self._lib.irmp_add_one_sample.restype = ctypes.c_int | |
71 | self._lib.irmp_add_one_sample.argtypes = [ ctypes.c_int, ] | |
72 | ||
73 | if False: | |
74 | self._lib.irmp_detect_buffer.restype = self.ResultData | |
75 | self._lib.irmp_detect_buffer.argtypes = [ ctypes.POINTER(ctypes.c_uint8), ctypes.c_size_t, ] | |
76 | ||
77 | self._lib.irmp_get_result_data.restype = ctypes.c_int | |
78 | self._lib.irmp_get_result_data.argtypes = [ ctypes.POINTER(self.ResultData), ] | |
79 | ||
80 | self._lib.irmp_get_protocol_name.restype = ctypes.c_char_p | |
81 | self._lib.irmp_get_protocol_name.argtypes = [ ctypes.c_uint32, ] | |
82 | ||
83 | # Create a result buffer that's local to the library instance. | |
84 | self._data = self.ResultData() | |
85 | ||
86 | def get_sample_rate(self): | |
87 | return self._lib.irmp_get_sample_rate() | |
88 | ||
89 | def reset_state(self): | |
90 | self._lib.irmp_reset_state() | |
91 | ||
92 | def add_one_sample(self, level): | |
93 | if not self._lib.irmp_add_one_sample(int(level)): | |
94 | return False | |
95 | self._lib.irmp_get_result_data(ctypes.byref(self._data)) | |
96 | return True | |
97 | ||
98 | def get_result_data(self): | |
99 | data = { | |
100 | 'proto_nr': self._data.protocol, | |
101 | 'proto_name': self._data.protocol_name.decode('UTF-8', 'ignore'), | |
102 | 'address': self._data.address, | |
103 | 'command': self._data.command, | |
104 | 'repeat': bool(self._data.flags & self.FLAG_REPETITION), | |
105 | 'start': self._data.start_sample, | |
106 | 'end': self._data.end_sample, | |
107 | } | |
108 | return data |