2 * This file is part of the PulseView project.
4 * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
23 #include "storesession.hpp"
25 #include <pv/session.hpp>
26 #include <pv/data/logic.hpp>
27 #include <pv/data/logicsegment.hpp>
28 #include <pv/view/signal.hpp>
30 #include <libsigrokcxx/libsigrokcxx.hpp>
32 using boost::shared_lock;
33 using boost::shared_mutex;
36 using std::dynamic_pointer_cast;
38 using std::lock_guard;
45 using std::shared_ptr;
50 using sigrok::ConfigKey;
52 using sigrok::OutputFormat;
56 const size_t StoreSession::BlockSize = 1024 * 1024;
58 StoreSession::StoreSession(const std::string &file_name,
59 const shared_ptr<OutputFormat> &output_format, const Session &session) :
60 file_name_(file_name),
61 output_format_(output_format),
69 StoreSession::~StoreSession()
74 pair<int, int> StoreSession::progress() const
76 return make_pair(units_stored_.load(), unit_count_.load());
79 const QString& StoreSession::error() const
81 lock_guard<mutex> lock(mutex_);
85 bool StoreSession::start()
87 set< shared_ptr<data::SignalData> > data_set =
90 shared_lock<shared_mutex> lock(session_.signals_mutex());
91 const vector< shared_ptr<view::Signal> > &sigs(session_.signals());
93 // Check we have logic data
94 if (data_set.empty() || sigs.empty()) {
95 error_ = tr("No data to save.");
99 if (data_set.size() > 1) {
100 error_ = tr("PulseView currently only has support for "
101 "storing a single data stream.");
105 // Get the logic data
106 shared_ptr<data::Logic> data;
107 if (!(data = dynamic_pointer_cast<data::Logic>(*data_set.begin()))) {
108 error_ = tr("PulseView currently only has support for "
109 "storing a logic data.");
114 const deque< shared_ptr<data::LogicSegment> > &segments =
115 data->logic_segments();
117 if (segments.empty()) {
118 error_ = tr("No segments to save.");
122 const shared_ptr<data::LogicSegment> segment(segments.front());
127 auto context = session_.session()->context();
128 auto device = session_.device();
130 map<string, Glib::VariantBase> options;
132 // If the output has the capability to write files, use it.
133 // Otherwise, open the output stream.
134 const auto opt_list = output_format_->options();
135 if (opt_list.find("filename") != opt_list.end())
136 options["filename"] =
137 Glib::Variant<Glib::ustring>::create(file_name_);
139 output_stream_.open(file_name_, ios_base::binary |
140 ios_base::trunc | ios_base::out);
142 output_ = output_format_->create_output(device, options);
143 auto meta = context->create_meta_packet(
144 {{ConfigKey::SAMPLERATE, Glib::Variant<guint64>::create(
145 segment->samplerate())}});
146 output_->receive(meta);
147 } catch (Error error) {
148 error_ = tr("Error while saving.");
152 thread_ = std::thread(&StoreSession::store_proc, this, segment);
156 void StoreSession::wait()
158 if (thread_.joinable())
162 void StoreSession::cancel()
167 void StoreSession::store_proc(shared_ptr<data::LogicSegment> segment)
171 uint64_t start_sample = 0, sample_count;
172 unsigned progress_scale = 0;
174 /// TODO: Wrap this in a std::unique_ptr when we transition to C++11
175 uint8_t *const data = new uint8_t[BlockSize];
178 const int unit_size = segment->unit_size();
179 assert(unit_size != 0);
181 sample_count = segment->get_sample_count();
183 // Qt needs the progress values to fit inside an int. If they would
184 // not, scale the current and max values down until they do.
185 while ((sample_count >> progress_scale) > INT_MAX)
188 unit_count_ = sample_count >> progress_scale;
190 const unsigned int samples_per_block = BlockSize / unit_size;
192 while (!interrupt_ && start_sample < sample_count)
196 const uint64_t end_sample = min(
197 start_sample + samples_per_block, sample_count);
198 segment->get_samples(data, start_sample, end_sample);
200 size_t length = end_sample - start_sample;
203 auto context = session_.session()->context();
204 auto logic = context->create_logic_packet(data, length, unit_size);
205 const string data = output_->receive(logic);
206 if (output_stream_.is_open())
207 output_stream_ << data;
208 } catch (Error error) {
209 error_ = tr("Error while saving.");
213 start_sample = end_sample;
214 units_stored_ = start_sample >> progress_scale;
217 // Zeroing the progress variables indicates completion
218 units_stored_ = unit_count_ = 0;
223 output_stream_.close();