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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2014 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 | ||
23 | #include "storesession.hpp" | |
24 | ||
25 | #include <pv/sigsession.hpp> | |
26 | #include <pv/data/logic.hpp> | |
27 | #include <pv/data/logicsnapshot.hpp> | |
28 | #include <pv/view/signal.hpp> | |
29 | ||
30 | #include <libsigrok/libsigrok.hpp> | |
31 | ||
32 | using boost::shared_lock; | |
33 | using boost::shared_mutex; | |
34 | ||
35 | using std::deque; | |
36 | using std::dynamic_pointer_cast; | |
37 | using std::lock_guard; | |
38 | using std::make_pair; | |
39 | using std::min; | |
40 | using std::mutex; | |
41 | using std::pair; | |
42 | using std::set; | |
43 | using std::shared_ptr; | |
44 | using std::string; | |
45 | using std::thread; | |
46 | using std::vector; | |
47 | ||
48 | using sigrok::ConfigKey; | |
49 | using sigrok::Error; | |
50 | ||
51 | namespace pv { | |
52 | ||
53 | const size_t StoreSession::BlockSize = 1024 * 1024; | |
54 | ||
55 | StoreSession::StoreSession(const std::string &file_name, | |
56 | const SigSession &session) : | |
57 | file_name_(file_name), | |
58 | session_(session), | |
59 | interrupt_(false), | |
60 | units_stored_(0), | |
61 | unit_count_(0) | |
62 | { | |
63 | } | |
64 | ||
65 | StoreSession::~StoreSession() | |
66 | { | |
67 | wait(); | |
68 | } | |
69 | ||
70 | pair<int, int> StoreSession::progress() const | |
71 | { | |
72 | return make_pair(units_stored_.load(), unit_count_.load()); | |
73 | } | |
74 | ||
75 | const QString& StoreSession::error() const | |
76 | { | |
77 | lock_guard<mutex> lock(mutex_); | |
78 | return error_; | |
79 | } | |
80 | ||
81 | bool StoreSession::start() | |
82 | { | |
83 | set< shared_ptr<data::SignalData> > data_set = | |
84 | session_.get_data(); | |
85 | ||
86 | shared_lock<shared_mutex> lock(session_.signals_mutex()); | |
87 | const vector< shared_ptr<view::Signal> > &sigs(session_.signals()); | |
88 | ||
89 | // Check we have logic data | |
90 | if (data_set.empty() || sigs.empty()) { | |
91 | error_ = tr("No data to save."); | |
92 | return false; | |
93 | } | |
94 | ||
95 | if (data_set.size() > 1) { | |
96 | error_ = tr("PulseView currently only has support for " | |
97 | "storing a single data stream."); | |
98 | return false; | |
99 | } | |
100 | ||
101 | // Get the logic data | |
102 | shared_ptr<data::Logic> data; | |
103 | if (!(data = dynamic_pointer_cast<data::Logic>(*data_set.begin()))) { | |
104 | error_ = tr("PulseView currently only has support for " | |
105 | "storing a logic data."); | |
106 | return false; | |
107 | } | |
108 | ||
109 | // Get the snapshot | |
110 | const deque< shared_ptr<data::LogicSnapshot> > &snapshots = | |
111 | data->get_snapshots(); | |
112 | ||
113 | if (snapshots.empty()) { | |
114 | error_ = tr("No snapshots to save."); | |
115 | return false; | |
116 | } | |
117 | ||
118 | const shared_ptr<data::LogicSnapshot> snapshot(snapshots.front()); | |
119 | assert(snapshot); | |
120 | ||
121 | // Begin storing | |
122 | try { | |
123 | auto context = session_.session()->context(); | |
124 | auto output_format = context->output_formats()["srzip"]; | |
125 | auto device = session_.device(); | |
126 | output_ = output_format->create_output(device, | |
127 | {{"filename", | |
128 | Glib::Variant<Glib::ustring>::create(file_name_)}}); | |
129 | auto meta = context->create_meta_packet( | |
130 | {{ConfigKey::SAMPLERATE, | |
131 | Glib::Variant<guint64>::create(data->samplerate())}}); | |
132 | output_->receive(meta); | |
133 | } catch (Error error) { | |
134 | error_ = tr("Error while saving."); | |
135 | return false; | |
136 | } | |
137 | ||
138 | thread_ = std::thread(&StoreSession::store_proc, this, snapshot); | |
139 | return true; | |
140 | } | |
141 | ||
142 | void StoreSession::wait() | |
143 | { | |
144 | if (thread_.joinable()) | |
145 | thread_.join(); | |
146 | } | |
147 | ||
148 | void StoreSession::cancel() | |
149 | { | |
150 | interrupt_ = true; | |
151 | } | |
152 | ||
153 | void StoreSession::store_proc(shared_ptr<data::LogicSnapshot> snapshot) | |
154 | { | |
155 | assert(snapshot); | |
156 | ||
157 | uint64_t start_sample = 0, sample_count; | |
158 | unsigned progress_scale = 0; | |
159 | ||
160 | /// TODO: Wrap this in a std::unique_ptr when we transition to C++11 | |
161 | uint8_t *const data = new uint8_t[BlockSize]; | |
162 | assert(data); | |
163 | ||
164 | const int unit_size = snapshot->unit_size(); | |
165 | assert(unit_size != 0); | |
166 | ||
167 | sample_count = snapshot->get_sample_count(); | |
168 | ||
169 | // Qt needs the progress values to fit inside an int. If they would | |
170 | // not, scale the current and max values down until they do. | |
171 | while ((sample_count >> progress_scale) > INT_MAX) | |
172 | progress_scale ++; | |
173 | ||
174 | unit_count_ = sample_count >> progress_scale; | |
175 | ||
176 | const unsigned int samples_per_block = BlockSize / unit_size; | |
177 | ||
178 | while (!interrupt_ && start_sample < sample_count) | |
179 | { | |
180 | progress_updated(); | |
181 | ||
182 | const uint64_t end_sample = min( | |
183 | start_sample + samples_per_block, sample_count); | |
184 | snapshot->get_samples(data, start_sample, end_sample); | |
185 | ||
186 | size_t length = end_sample - start_sample; | |
187 | ||
188 | try { | |
189 | auto context = session_.session()->context(); | |
190 | auto logic = context->create_logic_packet(data, length, unit_size); | |
191 | output_->receive(logic); | |
192 | } catch (Error error) { | |
193 | error_ = tr("Error while saving."); | |
194 | break; | |
195 | } | |
196 | ||
197 | start_sample = end_sample; | |
198 | units_stored_ = start_sample >> progress_scale; | |
199 | } | |
200 | ||
201 | progress_updated(); | |
202 | ||
203 | output_.reset(); | |
204 | ||
205 | delete[] data; | |
206 | } | |
207 | ||
208 | } // pv |