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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2015 Joel Holdsworth <joel@airwebreathe.org.uk> | |
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 | #include <cassert> | |
21 | #include <fstream> | |
22 | #include <vector> | |
23 | ||
24 | #include <QString> | |
25 | ||
26 | #include "inputfile.hpp" | |
27 | ||
28 | using std::map; | |
29 | using std::shared_ptr; | |
30 | using std::streamsize; | |
31 | using std::string; | |
32 | using std::ifstream; | |
33 | using std::ios; | |
34 | using std::vector; | |
35 | ||
36 | namespace pv { | |
37 | namespace devices { | |
38 | ||
39 | const streamsize InputFile::BufferSize = 16384; | |
40 | ||
41 | InputFile::InputFile(const shared_ptr<sigrok::Context> &context, | |
42 | const string &file_name, | |
43 | shared_ptr<sigrok::InputFormat> format, | |
44 | const map<string, Glib::VariantBase> &options) : | |
45 | File(file_name), | |
46 | context_(context), | |
47 | format_(format), | |
48 | options_(options), | |
49 | interrupt_(false) | |
50 | { | |
51 | } | |
52 | ||
53 | void InputFile::open() | |
54 | { | |
55 | if (session_) | |
56 | close(); | |
57 | else | |
58 | session_ = context_->create_session(); | |
59 | ||
60 | input_ = format_->create_input(options_); | |
61 | ||
62 | if (!input_) | |
63 | throw QString("Failed to create input"); | |
64 | ||
65 | // open() should add the input device to the session but | |
66 | // we can't open the device without sending some data first | |
67 | f = new ifstream(file_name_, ios::binary); | |
68 | ||
69 | vector<char> buffer(BufferSize); | |
70 | ||
71 | f->read(buffer.data(), BufferSize); | |
72 | const streamsize size = f->gcount(); | |
73 | if (size == 0) | |
74 | return; | |
75 | ||
76 | input_->send(buffer.data(), size); | |
77 | ||
78 | try { | |
79 | device_ = input_->device(); | |
80 | } catch (sigrok::Error&) { | |
81 | return; | |
82 | } | |
83 | ||
84 | session_->add_device(device_); | |
85 | } | |
86 | ||
87 | void InputFile::close() | |
88 | { | |
89 | if (session_) | |
90 | session_->remove_devices(); | |
91 | } | |
92 | ||
93 | void InputFile::start() | |
94 | { | |
95 | } | |
96 | ||
97 | void InputFile::run() | |
98 | { | |
99 | if (!f) { | |
100 | // Previous call to run() processed the entire file already | |
101 | f = new ifstream(file_name_, ios::binary); | |
102 | input_->reset(); | |
103 | } | |
104 | ||
105 | vector<char> buffer(BufferSize); | |
106 | ||
107 | interrupt_ = false; | |
108 | while (!interrupt_ && !f->eof()) { | |
109 | f->read(buffer.data(), BufferSize); | |
110 | const streamsize size = f->gcount(); | |
111 | if (size == 0) | |
112 | break; | |
113 | ||
114 | input_->send(buffer.data(), size); | |
115 | ||
116 | if (size != BufferSize) | |
117 | break; | |
118 | } | |
119 | ||
120 | input_->end(); | |
121 | ||
122 | delete f; | |
123 | f = nullptr; | |
124 | } | |
125 | ||
126 | void InputFile::stop() | |
127 | { | |
128 | interrupt_ = true; | |
129 | } | |
130 | ||
131 | } // namespace devices | |
132 | } // namespace pv |