pv/storesession.cpp

   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 #ifdef _WIN32
  24 // Windows: Avoid boost/thread namespace pollution (which includes windows.h).
  25 #define NOGDI
  26 #define NORESOURCE
  27 #endif
  28 #include <boost/thread/locks.hpp>
  29 #include <boost/thread/shared_mutex.hpp>
  30
  31 #include "storesession.hpp"
  32
  33 #include <pv/devicemanager.hpp>
  34 #include <pv/session.hpp>
  35 #include <pv/data/analog.hpp>
  36 #include <pv/data/analogsegment.hpp>
  37 #include <pv/data/logic.hpp>
  38 #include <pv/data/logicsegment.hpp>
  39 #include <pv/devices/device.hpp>
  40 #include <pv/view/signal.hpp>
  41
  42 #include <libsigrokcxx/libsigrokcxx.hpp>
  43
  44 using boost::shared_lock;
  45 using boost::shared_mutex;
  46
  47 using std::deque;
  48 using std::dynamic_pointer_cast;
  49 using std::ios_base;
  50 using std::lock_guard;
  51 using std::make_pair;
  52 using std::map;
  53 using std::min;
  54 using std::mutex;
  55 using std::pair;
  56 using std::set;
  57 using std::shared_ptr;
  58 using std::string;
  59 using std::thread;
  60 using std::unordered_set;
  61 using std::vector;
  62
  63 using Glib::VariantBase;
  64
  65 using sigrok::ConfigKey;
  66 using sigrok::Error;
  67 using sigrok::OutputFormat;
  68 using sigrok::OutputFlag;
  69
  70 namespace pv {
  71
  72 const size_t StoreSession::BlockSize = 1024 * 1024;
  73
  74 StoreSession::StoreSession(const std::string &file_name,
  75         const shared_ptr<OutputFormat> &output_format,
  76         const map<string, VariantBase> &options,
  77         const std::pair<uint64_t, uint64_t> sample_range,
  78         const Session &session) :
  79         file_name_(file_name),
  80         output_format_(output_format),
  81         options_(options),
  82         sample_range_(sample_range),
  83         session_(session),
  84         interrupt_(false),
  85         units_stored_(0),
  86         unit_count_(0)
  87 {
  88 }
  89
  90 StoreSession::~StoreSession()
  91 {
  92         wait();
  93 }
  94
  95 pair<int, int> StoreSession::progress() const
  96 {
  97         return make_pair(units_stored_.load(), unit_count_.load());
  98 }
  99
 100 const QString& StoreSession::error() const
 101 {
 102         lock_guard<mutex> lock(mutex_);
 103         return error_;
 104 }
 105
 106 bool StoreSession::start()
 107 {
 108         const unordered_set< shared_ptr<view::Signal> > sigs(session_.signals());
 109
 110         shared_ptr<data::Segment> any_segment;
 111         shared_ptr<data::LogicSegment> lsegment;
 112         vector< shared_ptr<sigrok::Channel> > achannel_list;
 113         vector< shared_ptr<data::AnalogSegment> > asegment_list;
 114
 115         for (shared_ptr<view::Signal> signal : sigs) {
 116                 if (!signal->enabled())
 117                         continue;
 118
 119                 shared_ptr<data::SignalData> data = signal->data();
 120
 121                 if (dynamic_pointer_cast<data::Logic>(data)) {
 122                         // All logic channels share the same data segments
 123                         shared_ptr<data::Logic> ldata = dynamic_pointer_cast<data::Logic>(data);
 124
 125                         const deque< shared_ptr<data::LogicSegment> > &lsegments =
 126                                 ldata->logic_segments();
 127
 128                         if (lsegments.empty()) {
 129                                 error_ = tr("Can't save logic channel without data.");
 130                                 return false;
 131                         }
 132
 133                         lsegment = lsegments.front();
 134                         any_segment = lsegment;
 135                 }
 136
 137                 if (dynamic_pointer_cast<data::Analog>(data)) {
 138                         // Each analog channel has its own segments
 139                         shared_ptr<data::Analog> adata =
 140                                 dynamic_pointer_cast<data::Analog>(data);
 141
 142                         const deque< shared_ptr<data::AnalogSegment> > &asegments =
 143                                 adata->analog_segments();
 144
 145                         if (asegments.empty()) {
 146                                 error_ = tr("Can't save analog channel without data.");
 147                                 return false;
 148                         }
 149
 150                         asegment_list.push_back(asegments.front());
 151                         any_segment = asegments.front();
 152
 153                         achannel_list.push_back(signal->channel());
 154                 }
 155         }
 156
 157         if (!any_segment) {
 158                 error_ = tr("No channels enabled.");
 159                 return false;
 160         }
 161
 162         // Check whether the user wants to export a certain sample range
 163         if (sample_range_.first == sample_range_.second) {
 164                 start_sample_ = 0;
 165                 sample_count_ = any_segment->get_sample_count();
 166         } else {
 167                 if (sample_range_.first > sample_range_.second) {
 168                         start_sample_ = sample_range_.second;
 169                         sample_count_ = sample_range_.first - sample_range_.second;
 170                 } else {
 171                         start_sample_ = sample_range_.first;
 172                         sample_count_ = sample_range_.second - sample_range_.first;
 173                 }
 174         }
 175
 176         // Begin storing
 177         try {
 178                 const auto context = session_.device_manager().context();
 179                 auto device = session_.device()->device();
 180
 181                 map<string, Glib::VariantBase> options = options_;
 182
 183                 if (!output_format_->test_flag(OutputFlag::INTERNAL_IO_HANDLING))
 184                         output_stream_.open(file_name_, ios_base::binary |
 185                                         ios_base::trunc | ios_base::out);
 186
 187                 output_ = output_format_->create_output(file_name_, device, options);
 188                 auto meta = context->create_meta_packet(
 189                         {{ConfigKey::SAMPLERATE, Glib::Variant<guint64>::create(
 190                                 any_segment->samplerate())}});
 191                 output_->receive(meta);
 192         } catch (Error error) {
 193                 error_ = tr("Error while saving: ") + error.what();
 194                 return false;
 195         }
 196
 197         thread_ = std::thread(&StoreSession::store_proc, this,
 198                 achannel_list, asegment_list, lsegment);
 199         return true;
 200 }
 201
 202 void StoreSession::wait()
 203 {
 204         if (thread_.joinable())
 205                 thread_.join();
 206 }
 207
 208 void StoreSession::cancel()
 209 {
 210         interrupt_ = true;
 211 }
 212
 213 void StoreSession::store_proc(vector< shared_ptr<sigrok::Channel> > achannel_list,
 214         vector< shared_ptr<data::AnalogSegment> > asegment_list,
 215         shared_ptr<data::LogicSegment> lsegment)
 216 {
 217         unsigned progress_scale = 0;
 218
 219         /// TODO: Wrap this in a std::unique_ptr when we transition to C++11
 220         uint8_t *const ldata = new uint8_t[BlockSize];
 221         assert(ldata);
 222
 223         int aunit_size = 0;
 224         int lunit_size = 0;
 225         unsigned int lsamples_per_block = INT_MAX;
 226         unsigned int asamples_per_block = INT_MAX;
 227
 228         if (!asegment_list.empty()) {
 229                 // We assume all analog channels use the sample unit size
 230                 aunit_size = asegment_list.front()->unit_size();
 231                 asamples_per_block = BlockSize / aunit_size;
 232         }
 233         if (lsegment) {
 234                 lunit_size = lsegment->unit_size();
 235                 lsamples_per_block = BlockSize / lunit_size;
 236         }
 237
 238         // Qt needs the progress values to fit inside an int. If they would
 239         // not, scale the current and max values down until they do.
 240         while ((sample_count_ >> progress_scale) > INT_MAX)
 241                 progress_scale ++;
 242
 243         unit_count_ = sample_count_ >> progress_scale;
 244
 245         const unsigned int samples_per_block =
 246                 std::min(asamples_per_block, lsamples_per_block);
 247
 248         while (!interrupt_ && sample_count_) {
 249                 progress_updated();
 250
 251                 const uint64_t packet_len =
 252                         std::min((uint64_t)samples_per_block, sample_count_);
 253
 254                 try {
 255                         const auto context = session_.device_manager().context();
 256
 257                         for (unsigned int i = 0; i < achannel_list.size(); i++) {
 258                                 shared_ptr<sigrok::Channel> achannel = achannel_list.at(i);
 259                                 shared_ptr<data::AnalogSegment> asegment = asegment_list.at(i);
 260
 261                                 const float *adata =
 262                                         asegment->get_samples(start_sample_, start_sample_ + packet_len);
 263
 264                                 // The srzip format currently only supports packets with one
 265                                 // analog channel. See zip_append_analog() in srzip.c
 266                                 auto analog = context->create_analog_packet(
 267                                         vector<shared_ptr<sigrok::Channel> >{achannel},
 268                                         (float *)adata, packet_len,
 269                                         sigrok::Quantity::VOLTAGE, sigrok::Unit::VOLT,
 270                                         vector<const sigrok::QuantityFlag *>());
 271                                 const string adata_str = output_->receive(analog);
 272
 273                                 if (output_stream_.is_open())
 274                                         output_stream_ << adata_str;
 275
 276                                 delete[] adata;
 277                         }
 278
 279                         if (lsegment) {
 280                                 lsegment->get_samples(ldata, start_sample_, start_sample_ + packet_len);
 281
 282                                 const size_t length = packet_len * lunit_size;
 283                                 auto logic = context->create_logic_packet(ldata, length, lunit_size);
 284                                 const string ldata_str = output_->receive(logic);
 285
 286                                 if (output_stream_.is_open())
 287                                         output_stream_ << ldata_str;
 288                         }
 289                 } catch (Error error) {
 290                         error_ = tr("Error while saving: ") + error.what();
 291                         break;
 292                 }
 293
 294                 sample_count_ -= packet_len;
 295                 start_sample_ += packet_len;
 296                 units_stored_ = unit_count_ - (sample_count_ >> progress_scale);
 297         }
 298
 299         // Zeroing the progress variables indicates completion
 300         units_stored_ = unit_count_ = 0;
 301
 302         progress_updated();
 303
 304         output_.reset();
 305         output_stream_.close();
 306
 307         delete[] ldata;
 308 }
 309
 310 } // pv