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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.h" | |
24 | ||
25 | #include <pv/sigsession.h> | |
26 | #include <pv/data/logic.h> | |
27 | #include <pv/data/logicsnapshot.h> | |
28 | #include <pv/view/signal.h> | |
29 | ||
30 | using std::deque; | |
31 | using std::dynamic_pointer_cast; | |
32 | using std::lock_guard; | |
33 | using std::make_pair; | |
34 | using std::min; | |
35 | using std::mutex; | |
36 | using std::pair; | |
37 | using std::set; | |
38 | using std::shared_ptr; | |
39 | using std::string; | |
40 | using std::thread; | |
41 | using std::vector; | |
42 | ||
43 | namespace pv { | |
44 | ||
45 | const size_t StoreSession::BlockSize = 1024 * 1024; | |
46 | ||
47 | StoreSession::StoreSession(const std::string &file_name, | |
48 | const SigSession &session) : | |
49 | _file_name(file_name), | |
50 | _session(session), | |
51 | _interrupt(false), | |
52 | _units_stored(0), | |
53 | _unit_count(0) | |
54 | { | |
55 | } | |
56 | ||
57 | StoreSession::~StoreSession() | |
58 | { | |
59 | wait(); | |
60 | } | |
61 | ||
62 | pair<int, int> StoreSession::progress() const | |
63 | { | |
64 | return make_pair(_units_stored.load(), _unit_count.load()); | |
65 | } | |
66 | ||
67 | const QString& StoreSession::error() const | |
68 | { | |
69 | lock_guard<mutex> lock(_mutex); | |
70 | return _error; | |
71 | } | |
72 | ||
73 | bool StoreSession::start() | |
74 | { | |
75 | set< shared_ptr<data::SignalData> > data_set = | |
76 | _session.get_data(); | |
77 | const vector< shared_ptr<view::Signal> > sigs = | |
78 | _session.get_signals(); | |
79 | ||
80 | // Check we have logic data | |
81 | if (data_set.empty() || sigs.empty()) { | |
82 | _error = tr("No data to save."); | |
83 | return false; | |
84 | } | |
85 | ||
86 | if (data_set.size() > 1) { | |
87 | _error = tr("PulseView currently only has support for " | |
88 | "storing a single data stream."); | |
89 | return false; | |
90 | } | |
91 | ||
92 | // Get the logic data | |
93 | //shared_ptr<data::SignalData | |
94 | shared_ptr<data::Logic> data; | |
95 | if (!(data = dynamic_pointer_cast<data::Logic>(*data_set.begin()))) { | |
96 | _error = tr("PulseView currently only has support for " | |
97 | "storing a logic data."); | |
98 | return false; | |
99 | } | |
100 | ||
101 | // Get the snapshot | |
102 | const deque< shared_ptr<data::LogicSnapshot> > &snapshots = | |
103 | data->get_snapshots(); | |
104 | ||
105 | if (snapshots.empty()) { | |
106 | _error = tr("No snapshots to save."); | |
107 | return false; | |
108 | } | |
109 | ||
110 | const shared_ptr<data::LogicSnapshot> snapshot(snapshots.front()); | |
111 | assert(snapshot); | |
112 | ||
113 | // Make a list of channels | |
114 | char **const channels = new char*[sigs.size() + 1]; | |
115 | for (size_t i = 0; i < sigs.size(); i++) { | |
116 | shared_ptr<view::Signal> sig(sigs[i]); | |
117 | assert(sig); | |
118 | channels[i] = strdup(sig->get_name().toUtf8().constData()); | |
119 | } | |
120 | channels[sigs.size()] = NULL; | |
121 | ||
122 | // Begin storing | |
123 | if (sr_session_save_init(SigSession::_sr_session, _file_name.c_str(), | |
124 | data->samplerate(), channels) != SR_OK) { | |
125 | _error = tr("Error while saving."); | |
126 | return false; | |
127 | } | |
128 | ||
129 | // Delete the channels array | |
130 | for (size_t i = 0; i <= sigs.size(); i++) | |
131 | free(channels[i]); | |
132 | delete[] channels; | |
133 | ||
134 | _thread = std::thread(&StoreSession::store_proc, this, snapshot); | |
135 | return true; | |
136 | } | |
137 | ||
138 | void StoreSession::wait() | |
139 | { | |
140 | if (_thread.joinable()) | |
141 | _thread.join(); | |
142 | } | |
143 | ||
144 | void StoreSession::cancel() | |
145 | { | |
146 | _interrupt = true; | |
147 | } | |
148 | ||
149 | void StoreSession::store_proc(shared_ptr<data::LogicSnapshot> snapshot) | |
150 | { | |
151 | assert(snapshot); | |
152 | ||
153 | uint64_t start_sample = 0, sample_count; | |
154 | unsigned progress_scale = 0; | |
155 | ||
156 | /// TODO: Wrap this in a std::unique_ptr when we transition to C++11 | |
157 | uint8_t *const data = new uint8_t[BlockSize]; | |
158 | assert(data); | |
159 | ||
160 | const int unit_size = snapshot->unit_size(); | |
161 | assert(unit_size != 0); | |
162 | ||
163 | sample_count = snapshot->get_sample_count(); | |
164 | ||
165 | // Qt needs the progress values to fit inside an int. If they would | |
166 | // not, scale the current and max values down until they do. | |
167 | while ((sample_count >> progress_scale) > INT_MAX) | |
168 | progress_scale ++; | |
169 | ||
170 | _unit_count = sample_count >> progress_scale; | |
171 | ||
172 | const unsigned int samples_per_block = BlockSize / unit_size; | |
173 | ||
174 | while (!_interrupt && start_sample < sample_count) | |
175 | { | |
176 | progress_updated(); | |
177 | ||
178 | const uint64_t end_sample = min( | |
179 | start_sample + samples_per_block, sample_count); | |
180 | snapshot->get_samples(data, start_sample, end_sample); | |
181 | ||
182 | if(sr_session_append(SigSession::_sr_session, _file_name.c_str(), data, | |
183 | unit_size, end_sample - start_sample) != SR_OK) | |
184 | { | |
185 | _error = tr("Error while saving."); | |
186 | break; | |
187 | } | |
188 | ||
189 | start_sample = end_sample; | |
190 | _units_stored = start_sample >> progress_scale; | |
191 | } | |
192 | ||
193 | _unit_count = 0; | |
194 | progress_updated(); | |
195 | ||
196 | delete[] data; | |
197 | } | |
198 | ||
199 | } // pv |