]>
Commit | Line | Data |
---|---|---|
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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <cassert> | |
22 | #include <fstream> | |
23 | ||
24 | #include <QString> | |
25 | ||
26 | #include "inputfile.hpp" | |
27 | ||
28 | namespace pv { | |
29 | namespace devices { | |
30 | ||
31 | const std::streamsize InputFile::BufferSize = 16384; | |
32 | ||
33 | InputFile::InputFile(const std::shared_ptr<sigrok::Context> &context, | |
34 | const std::string &file_name, | |
35 | std::shared_ptr<sigrok::InputFormat> format, | |
36 | const std::map<std::string, Glib::VariantBase> &options) : | |
37 | File(file_name), | |
38 | context_(context), | |
39 | format_(format), | |
40 | options_(options), | |
41 | interrupt_(false) | |
42 | { | |
43 | } | |
44 | ||
45 | void InputFile::open() | |
46 | { | |
47 | if (session_) | |
48 | close(); | |
49 | else | |
50 | session_ = context_->create_session(); | |
51 | ||
52 | input_ = format_->create_input(options_); | |
53 | ||
54 | if (!input_) | |
55 | throw QString("Failed to create input"); | |
56 | ||
57 | // open() should add the input device to the session but | |
58 | // we can't open the device without sending some data first | |
59 | f = new std::ifstream(file_name_, std::ios::binary); | |
60 | ||
61 | char buffer[BufferSize]; | |
62 | f->read(buffer, BufferSize); | |
63 | const std::streamsize size = f->gcount(); | |
64 | if (size == 0) | |
65 | return; | |
66 | ||
67 | input_->send(buffer, size); | |
68 | ||
69 | try { | |
70 | device_ = input_->device(); | |
71 | } catch (sigrok::Error) { | |
72 | return; | |
73 | } | |
74 | ||
75 | session_->add_device(device_); | |
76 | } | |
77 | ||
78 | void InputFile::close() | |
79 | { | |
80 | if (session_) | |
81 | session_->remove_devices(); | |
82 | } | |
83 | ||
84 | void InputFile::start() | |
85 | { | |
86 | } | |
87 | ||
88 | void InputFile::run() | |
89 | { | |
90 | char buffer[BufferSize]; | |
91 | ||
92 | if (!f) { | |
93 | // Previous call to run() processed the entire file already | |
94 | f = new std::ifstream(file_name_, std::ios::binary); | |
95 | input_->reset(); | |
96 | } | |
97 | ||
98 | interrupt_ = false; | |
99 | while (!interrupt_ && !f->eof()) { | |
100 | f->read(buffer, BufferSize); | |
101 | const std::streamsize size = f->gcount(); | |
102 | if (size == 0) | |
103 | break; | |
104 | ||
105 | input_->send(buffer, size); | |
106 | ||
107 | if (size != BufferSize) | |
108 | break; | |
109 | } | |
110 | ||
111 | input_->end(); | |
112 | ||
113 | delete f; | |
114 | f = nullptr; | |
115 | } | |
116 | ||
117 | void InputFile::stop() | |
118 | { | |
119 | interrupt_ = true; | |
120 | } | |
121 | ||
122 | } // namespace devices | |
123 | } // namespace pv |