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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 "storesession.h" | |
22 | ||
23 | #include <pv/sigsession.h> | |
24 | #include <pv/data/logic.h> | |
25 | #include <pv/data/logicsnapshot.h> | |
26 | #include <pv/view/signal.h> | |
27 | ||
28 | using boost::dynamic_pointer_cast; | |
29 | using boost::mutex; | |
30 | using boost::shared_ptr; | |
31 | using boost::thread; | |
32 | using boost::lock_guard; | |
33 | using std::deque; | |
34 | using std::make_pair; | |
35 | using std::min; | |
36 | using std::pair; | |
37 | using std::set; | |
38 | using std::string; | |
39 | using std::vector; | |
40 | ||
41 | namespace pv { | |
42 | ||
43 | const size_t StoreSession::BlockSize = 1024 * 1024; | |
44 | ||
45 | StoreSession::StoreSession(const std::string &file_name, | |
46 | const SigSession &session) : | |
47 | _file_name(file_name), | |
48 | _session(session), | |
49 | _units_stored(0), | |
50 | _unit_count(0) | |
51 | { | |
52 | } | |
53 | ||
54 | StoreSession::~StoreSession() | |
55 | { | |
56 | wait(); | |
57 | } | |
58 | ||
59 | pair<uint64_t, uint64_t> StoreSession::progress() const | |
60 | { | |
61 | lock_guard<mutex> lock(_mutex); | |
62 | return make_pair(_units_stored, _unit_count); | |
63 | } | |
64 | ||
65 | const QString& StoreSession::error() const | |
66 | { | |
67 | lock_guard<mutex> lock(_mutex); | |
68 | return _error; | |
69 | } | |
70 | ||
71 | bool StoreSession::start() | |
72 | { | |
73 | set< shared_ptr<data::SignalData> > data_set = | |
74 | _session.get_data(); | |
75 | const vector< shared_ptr<view::Signal> > sigs = | |
76 | _session.get_signals(); | |
77 | ||
78 | // Check we have logic data | |
79 | if (data_set.empty() || sigs.empty()) { | |
80 | _error = tr("No data to save."); | |
81 | return false; | |
82 | } | |
83 | ||
84 | if (data_set.size() > 1) { | |
85 | _error = tr("PulseView currently only has support for " | |
86 | "storing a single data stream."); | |
87 | return false; | |
88 | } | |
89 | ||
90 | // Get the logic data | |
91 | //shared_ptr<data::SignalData | |
92 | shared_ptr<data::Logic> data; | |
93 | if (!(data = dynamic_pointer_cast<data::Logic>(*data_set.begin()))) { | |
94 | _error = tr("PulseView currently only has support for " | |
95 | "storing a logic data."); | |
96 | return false; | |
97 | } | |
98 | ||
99 | // Get the snapshot | |
100 | const deque< shared_ptr<data::LogicSnapshot> > &snapshots = | |
101 | data->get_snapshots(); | |
102 | ||
103 | if (snapshots.empty()) { | |
104 | _error = tr("No snapshots to save."); | |
105 | return false; | |
106 | } | |
107 | ||
108 | const shared_ptr<data::LogicSnapshot> snapshot(snapshots.front()); | |
109 | assert(snapshot); | |
110 | ||
111 | // Make a list of probes | |
112 | char **const probes = new char*[sigs.size() + 1]; | |
113 | for (size_t i = 0; i < sigs.size(); i++) { | |
114 | shared_ptr<view::Signal> sig(sigs[i]); | |
115 | assert(sig); | |
116 | probes[i] = strdup(sig->get_name().toUtf8().constData()); | |
117 | } | |
118 | probes[sigs.size()] = NULL; | |
119 | ||
120 | // Begin storing | |
121 | if (sr_session_save_init(_file_name.c_str(), | |
122 | data->samplerate(), probes) != SR_OK) { | |
123 | _error = tr("Error while saving."); | |
124 | return false; | |
125 | } | |
126 | ||
127 | // Delete the probes array | |
128 | for (size_t i = 0; i <= sigs.size(); i++) | |
129 | free(probes[i]); | |
130 | delete[] probes; | |
131 | ||
132 | _thread = boost::thread(&StoreSession::store_proc, this, snapshot); | |
133 | return true; | |
134 | } | |
135 | ||
136 | void StoreSession::wait() | |
137 | { | |
138 | _thread.join(); | |
139 | } | |
140 | ||
141 | void StoreSession::cancel() | |
142 | { | |
143 | _thread.interrupt(); | |
144 | } | |
145 | ||
146 | void StoreSession::store_proc(shared_ptr<data::LogicSnapshot> snapshot) | |
147 | { | |
148 | assert(snapshot); | |
149 | ||
150 | uint64_t start_sample = 0; | |
151 | ||
152 | /// TODO: Wrap this in a std::unique_ptr when we transition to C++11 | |
153 | uint8_t *const data = new uint8_t[BlockSize]; | |
154 | assert(data); | |
155 | ||
156 | const int unit_size = snapshot->unit_size(); | |
157 | assert(unit_size != 0); | |
158 | ||
159 | { | |
160 | lock_guard<mutex> lock(_mutex); | |
161 | _unit_count = snapshot->get_sample_count(); | |
162 | } | |
163 | ||
164 | const unsigned int samples_per_block = BlockSize / unit_size; | |
165 | ||
166 | while (!boost::this_thread::interruption_requested() && | |
167 | start_sample < _unit_count) | |
168 | { | |
169 | progress_updated(); | |
170 | ||
171 | const uint64_t end_sample = min( | |
172 | start_sample + samples_per_block, _unit_count); | |
173 | snapshot->get_samples(data, start_sample, end_sample); | |
174 | ||
175 | if(sr_session_append(_file_name.c_str(), data, unit_size, | |
176 | end_sample - start_sample) != SR_OK) | |
177 | { | |
178 | _error = tr("Error while saving."); | |
179 | break; | |
180 | } | |
181 | ||
182 | start_sample = end_sample; | |
183 | ||
184 | { | |
185 | lock_guard<mutex> lock(_mutex); | |
186 | _units_stored = start_sample; | |
187 | } | |
188 | } | |
189 | ||
190 | progress_updated(); | |
191 | ||
192 | delete[] data; | |
193 | } | |
194 | ||
195 | } // pv |