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