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[pulseview.git] / pv / devices / inputfile.cpp
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         input_(format->create_input(options)),
40         interrupt_(false) {
41         if (!input_)
42                 throw QString("Failed to create input");
43 }
44
45 void InputFile::open() {
46         if (session_)
47                 close();
48
49         session_ = context_->create_session();
50 }
51
52 void InputFile::close() {
53         if (session_)
54                 session_->remove_devices();
55 }
56
57 void InputFile::start() {
58 }
59
60 void InputFile::run() {
61         char buffer[BufferSize];
62         bool need_device = true;
63
64         assert(session_);
65         assert(input_);
66
67         interrupt_ = false;
68         std::ifstream f(file_name_);
69         while (!interrupt_ && f) {
70                 f.read(buffer, BufferSize);
71                 const std::streamsize size = f.gcount();
72                 if (size == 0)
73                         break;
74
75                 input_->send(buffer, size);
76
77                 if (need_device) {
78                         try {
79                                 device_ = input_->device();
80                         } catch (sigrok::Error) {
81                                 break;
82                         }
83
84                         session_->add_device(device_);
85                         need_device = false;
86                 }
87
88                 if (size != BufferSize)
89                         break;
90         }
91
92         input_->end();
93 }
94
95 void InputFile::stop() {
96         interrupt_ = true;
97 }
98
99 } // namespace devices
100 } // namespace pv