pv/session.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012-14 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <QDebug>
  21 #include <QFileInfo>
  22
  23 #include <cassert>
  24 #include <memory>
  25 #include <mutex>
  26 #include <stdexcept>
  27
  28 #include <sys/stat.h>
  29
  30 #include "devicemanager.hpp"
  31 #include "mainwindow.hpp"
  32 #include "session.hpp"
  33
  34 #include "data/analog.hpp"
  35 #include "data/analogsegment.hpp"
  36 #include "data/decode/decoder.hpp"
  37 #include "data/logic.hpp"
  38 #include "data/logicsegment.hpp"
  39 #include "data/signalbase.hpp"
  40
  41 #include "devices/hardwaredevice.hpp"
  42 #include "devices/inputfile.hpp"
  43 #include "devices/sessionfile.hpp"
  44
  45 #include "toolbars/mainbar.hpp"
  46
  47 #include "views/trace/analogsignal.hpp"
  48 #include "views/trace/decodetrace.hpp"
  49 #include "views/trace/logicsignal.hpp"
  50 #include "views/trace/signal.hpp"
  51 #include "views/trace/view.hpp"
  52
  53 #include <libsigrokcxx/libsigrokcxx.hpp>
  54
  55 #ifdef ENABLE_DECODE
  56 #include <libsigrokdecode/libsigrokdecode.h>
  57 #include "data/decodesignal.hpp"
  58 #endif
  59
  60 using std::bad_alloc;
  61 using std::dynamic_pointer_cast;
  62 using std::find_if;
  63 using std::function;
  64 using std::lock_guard;
  65 using std::list;
  66 using std::make_pair;
  67 using std::make_shared;
  68 using std::map;
  69 using std::max;
  70 using std::move;
  71 using std::mutex;
  72 using std::pair;
  73 using std::recursive_mutex;
  74 using std::runtime_error;
  75 using std::shared_ptr;
  76 using std::string;
  77 using std::unique_ptr;
  78 using std::unordered_set;
  79 using std::vector;
  80
  81 using sigrok::Analog;
  82 using sigrok::Channel;
  83 using sigrok::ConfigKey;
  84 using sigrok::DatafeedCallbackFunction;
  85 using sigrok::Error;
  86 using sigrok::InputFormat;
  87 using sigrok::Logic;
  88 using sigrok::Meta;
  89 using sigrok::Packet;
  90 using sigrok::Session;
  91
  92 using Glib::VariantBase;
  93
  94 namespace pv {
  95
  96 shared_ptr<sigrok::Context> Session::sr_context;
  97
  98 Session::Session(DeviceManager &device_manager, QString name) :
  99         device_manager_(device_manager),
 100         default_name_(name),
 101         name_(name),
 102         capture_state_(Stopped),
 103         cur_samplerate_(0),
 104         data_saved_(true)
 105 {
 106 }
 107
 108 Session::~Session()
 109 {
 110         // Stop and join to the thread
 111         stop_capture();
 112 }
 113
 114 DeviceManager& Session::device_manager()
 115 {
 116         return device_manager_;
 117 }
 118
 119 const DeviceManager& Session::device_manager() const
 120 {
 121         return device_manager_;
 122 }
 123
 124 shared_ptr<sigrok::Session> Session::session() const
 125 {
 126         if (!device_)
 127                 return shared_ptr<sigrok::Session>();
 128         return device_->session();
 129 }
 130
 131 shared_ptr<devices::Device> Session::device() const
 132 {
 133         return device_;
 134 }
 135
 136 QString Session::name() const
 137 {
 138         return name_;
 139 }
 140
 141 void Session::set_name(QString name)
 142 {
 143         if (default_name_.isEmpty())
 144                 default_name_ = name;
 145
 146         name_ = name;
 147
 148         name_changed();
 149 }
 150
 151 const list< shared_ptr<views::ViewBase> > Session::views() const
 152 {
 153         return views_;
 154 }
 155
 156 shared_ptr<views::ViewBase> Session::main_view() const
 157 {
 158         return main_view_;
 159 }
 160
 161 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 162 {
 163         main_bar_ = main_bar;
 164 }
 165
 166 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 167 {
 168         return main_bar_;
 169 }
 170
 171 bool Session::data_saved() const
 172 {
 173         return data_saved_;
 174 }
 175
 176 void Session::save_settings(QSettings &settings) const
 177 {
 178         map<string, string> dev_info;
 179         list<string> key_list;
 180         int decode_signals = 0, views = 0;
 181
 182         if (device_) {
 183                 shared_ptr<devices::HardwareDevice> hw_device =
 184                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 185
 186                 if (hw_device) {
 187                         settings.setValue("device_type", "hardware");
 188                         settings.beginGroup("device");
 189
 190                         key_list.emplace_back("vendor");
 191                         key_list.emplace_back("model");
 192                         key_list.emplace_back("version");
 193                         key_list.emplace_back("serial_num");
 194                         key_list.emplace_back("connection_id");
 195
 196                         dev_info = device_manager_.get_device_info(device_);
 197
 198                         for (string key : key_list) {
 199                                 if (dev_info.count(key))
 200                                         settings.setValue(QString::fromUtf8(key.c_str()),
 201                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 202                                 else
 203                                         settings.remove(QString::fromUtf8(key.c_str()));
 204                         }
 205
 206                         settings.endGroup();
 207                 }
 208
 209                 shared_ptr<devices::SessionFile> sessionfile_device =
 210                         dynamic_pointer_cast< devices::SessionFile >(device_);
 211
 212                 if (sessionfile_device) {
 213                         settings.setValue("device_type", "sessionfile");
 214                         settings.beginGroup("device");
 215                         settings.setValue("filename", QString::fromStdString(
 216                                 sessionfile_device->full_name()));
 217                         settings.endGroup();
 218                 }
 219
 220                 // Save channels and decoders
 221                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 222 #ifdef ENABLE_DECODE
 223                         if (base->is_decode_signal()) {
 224                                 settings.beginGroup("decode_signal" + QString::number(decode_signals++));
 225                                 base->save_settings(settings);
 226                                 settings.endGroup();
 227                         } else
 228 #endif
 229                         {
 230                                 settings.beginGroup(base->internal_name());
 231                                 base->save_settings(settings);
 232                                 settings.endGroup();
 233                         }
 234                 }
 235
 236                 settings.setValue("decode_signals", decode_signals);
 237
 238                 // Save view states and their signal settings
 239                 // Note: main_view must be saved as view0
 240                 settings.beginGroup("view" + QString::number(views++));
 241                 main_view_->save_settings(settings);
 242                 settings.endGroup();
 243
 244                 for (shared_ptr<views::ViewBase> view : views_) {
 245                         if (view != main_view_) {
 246                                 settings.beginGroup("view" + QString::number(views++));
 247                                 view->save_settings(settings);
 248                                 settings.endGroup();
 249                         }
 250                 }
 251
 252                 settings.setValue("views", views);
 253         }
 254 }
 255
 256 void Session::restore_settings(QSettings &settings)
 257 {
 258         shared_ptr<devices::Device> device;
 259
 260         QString device_type = settings.value("device_type").toString();
 261
 262         if (device_type == "hardware") {
 263                 map<string, string> dev_info;
 264                 list<string> key_list;
 265
 266                 // Re-select last used device if possible but only if it's not demo
 267                 settings.beginGroup("device");
 268                 key_list.emplace_back("vendor");
 269                 key_list.emplace_back("model");
 270                 key_list.emplace_back("version");
 271                 key_list.emplace_back("serial_num");
 272                 key_list.emplace_back("connection_id");
 273
 274                 for (string key : key_list) {
 275                         const QString k = QString::fromStdString(key);
 276                         if (!settings.contains(k))
 277                                 continue;
 278
 279                         const string value = settings.value(k).toString().toStdString();
 280                         if (!value.empty())
 281                                 dev_info.insert(make_pair(key, value));
 282                 }
 283
 284                 if (dev_info.count("model") > 0)
 285                         device = device_manager_.find_device_from_info(dev_info);
 286
 287                 if (device)
 288                         set_device(device);
 289
 290                 settings.endGroup();
 291         }
 292
 293         if (device_type == "sessionfile") {
 294                 settings.beginGroup("device");
 295                 QString filename = settings.value("filename").toString();
 296                 settings.endGroup();
 297
 298                 if (QFileInfo(filename).isReadable()) {
 299                         device = make_shared<devices::SessionFile>(device_manager_.context(),
 300                                 filename.toStdString());
 301                         set_device(device);
 302
 303                         start_capture([](QString infoMessage) {
 304                                 // TODO Emulate noquote()
 305                                 qDebug() << "Session error:" << infoMessage; });
 306
 307                         set_name(QFileInfo(filename).fileName());
 308                 }
 309         }
 310
 311         if (device) {
 312                 // Restore channels
 313                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 314                         settings.beginGroup(base->internal_name());
 315                         base->restore_settings(settings);
 316                         settings.endGroup();
 317                 }
 318
 319                 // Restore decoders
 320 #ifdef ENABLE_DECODE
 321                 int decode_signals = settings.value("decode_signals").toInt();
 322
 323                 for (int i = 0; i < decode_signals; i++) {
 324                         settings.beginGroup("decode_signal" + QString::number(i));
 325                         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 326                         signal->restore_settings(settings);
 327                         settings.endGroup();
 328                 }
 329 #endif
 330
 331                 // Restore views
 332                 int views = settings.value("views").toInt();
 333
 334                 for (int i = 0; i < views; i++) {
 335                         settings.beginGroup("view" + QString::number(i));
 336
 337                         if (i > 0) {
 338                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 339                                 add_view(name_, type, this);
 340                                 views_.back()->restore_settings(settings);
 341                         } else
 342                                 main_view_->restore_settings(settings);
 343
 344                         settings.endGroup();
 345                 }
 346         }
 347 }
 348
 349 void Session::select_device(shared_ptr<devices::Device> device)
 350 {
 351         try {
 352                 if (device)
 353                         set_device(device);
 354                 else
 355                         set_default_device();
 356         } catch (const QString &e) {
 357                 MainWindow::show_session_error(tr("Failed to select device"), e);
 358         }
 359 }
 360
 361 void Session::set_device(shared_ptr<devices::Device> device)
 362 {
 363         assert(device);
 364
 365         // Ensure we are not capturing before setting the device
 366         stop_capture();
 367
 368         if (device_)
 369                 device_->close();
 370
 371         device_.reset();
 372
 373         // Revert name back to default name (e.g. "Session 1") as the data is gone
 374         name_ = default_name_;
 375         name_changed();
 376
 377         // Remove all stored data
 378         for (shared_ptr<views::ViewBase> view : views_) {
 379                 view->clear_signals();
 380 #ifdef ENABLE_DECODE
 381                 view->clear_decode_signals();
 382 #endif
 383         }
 384         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 385                 d->clear();
 386         all_signal_data_.clear();
 387         signalbases_.clear();
 388         cur_logic_segment_.reset();
 389
 390         for (auto entry : cur_analog_segments_) {
 391                 shared_ptr<sigrok::Channel>(entry.first).reset();
 392                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 393         }
 394
 395         logic_data_.reset();
 396
 397         signals_changed();
 398
 399         device_ = move(device);
 400
 401         try {
 402                 device_->open();
 403         } catch (const QString &e) {
 404                 device_.reset();
 405                 MainWindow::show_session_error(tr("Failed to open device"), e);
 406         }
 407
 408         if (device_) {
 409                 device_->session()->add_datafeed_callback([=]
 410                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 411                                 data_feed_in(device, packet);
 412                         });
 413
 414                 update_signals();
 415         }
 416
 417         device_changed();
 418 }
 419
 420 void Session::set_default_device()
 421 {
 422         const list< shared_ptr<devices::HardwareDevice> > &devices =
 423                 device_manager_.devices();
 424
 425         if (devices.empty())
 426                 return;
 427
 428         // Try and find the demo device and select that by default
 429         const auto iter = find_if(devices.begin(), devices.end(),
 430                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 431                         return d->hardware_device()->driver()->name() == "demo"; });
 432         set_device((iter == devices.end()) ? devices.front() : *iter);
 433 }
 434
 435 /**
 436  * Convert generic options to data types that are specific to InputFormat.
 437  *
 438  * @param[in] user_spec Vector of tokenized words, string format.
 439  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 440  *
 441  * @return Map of options suitable for InputFormat::create_input().
 442  */
 443 map<string, Glib::VariantBase>
 444 Session::input_format_options(vector<string> user_spec,
 445                 map<string, shared_ptr<Option>> fmt_opts)
 446 {
 447         map<string, Glib::VariantBase> result;
 448
 449         for (auto entry : user_spec) {
 450                 /*
 451                  * Split key=value specs. Accept entries without separator
 452                  * (for simplified boolean specifications).
 453                  */
 454                 string key, val;
 455                 size_t pos = entry.find("=");
 456                 if (pos == std::string::npos) {
 457                         key = entry;
 458                         val = "";
 459                 } else {
 460                         key = entry.substr(0, pos);
 461                         val = entry.substr(pos + 1);
 462                 }
 463
 464                 /*
 465                  * Skip user specifications that are not a member of the
 466                  * format's set of supported options. Have the text input
 467                  * spec converted to the required input format specific
 468                  * data type.
 469                  */
 470                 auto found = fmt_opts.find(key);
 471                 if (found == fmt_opts.end())
 472                         continue;
 473                 shared_ptr<Option> opt = found->second;
 474                 result[key] = opt->parse_string(val);
 475         }
 476
 477         return result;
 478 }
 479
 480 void Session::load_init_file(const string &file_name, const string &format)
 481 {
 482         shared_ptr<InputFormat> input_format;
 483         map<string, Glib::VariantBase> input_opts;
 484
 485         if (!format.empty()) {
 486                 const map<string, shared_ptr<InputFormat> > formats =
 487                         device_manager_.context()->input_formats();
 488                 auto user_opts = pv::util::split_string(format, ":");
 489                 string user_name = user_opts.front();
 490                 user_opts.erase(user_opts.begin());
 491                 const auto iter = find_if(formats.begin(), formats.end(),
 492                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 493                                 return f.first == user_name; });
 494                 if (iter == formats.end()) {
 495                         MainWindow::show_session_error(tr("Error"),
 496                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 497                         return;
 498                 }
 499                 input_format = (*iter).second;
 500                 input_opts = input_format_options(user_opts,
 501                         input_format->options());
 502         }
 503
 504         load_file(QString::fromStdString(file_name), input_format, input_opts);
 505 }
 506
 507 void Session::load_file(QString file_name,
 508         shared_ptr<sigrok::InputFormat> format,
 509         const map<string, Glib::VariantBase> &options)
 510 {
 511         const QString errorMessage(
 512                 QString("Failed to load file %1").arg(file_name));
 513
 514         // In the absence of a caller's format spec, try to auto detect.
 515         // Assume "sigrok session file" upon lookup miss.
 516         if (!format)
 517                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 518         try {
 519                 if (format)
 520                         set_device(shared_ptr<devices::Device>(
 521                                 new devices::InputFile(
 522                                         device_manager_.context(),
 523                                         file_name.toStdString(),
 524                                         format, options)));
 525                 else
 526                         set_device(shared_ptr<devices::Device>(
 527                                 new devices::SessionFile(
 528                                         device_manager_.context(),
 529                                         file_name.toStdString())));
 530         } catch (Error& e) {
 531                 MainWindow::show_session_error(tr("Failed to load ") + file_name, e.what());
 532                 set_default_device();
 533                 main_bar_->update_device_list();
 534                 return;
 535         }
 536
 537         main_bar_->update_device_list();
 538
 539         start_capture([&, errorMessage](QString infoMessage) {
 540                 MainWindow::show_session_error(errorMessage, infoMessage); });
 541
 542         set_name(QFileInfo(file_name).fileName());
 543 }
 544
 545 Session::capture_state Session::get_capture_state() const
 546 {
 547         lock_guard<mutex> lock(sampling_mutex_);
 548         return capture_state_;
 549 }
 550
 551 void Session::start_capture(function<void (const QString)> error_handler)
 552 {
 553         if (!device_) {
 554                 error_handler(tr("No active device set, can't start acquisition."));
 555                 return;
 556         }
 557
 558         stop_capture();
 559
 560         // Check that at least one channel is enabled
 561         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 562         if (sr_dev) {
 563                 const auto channels = sr_dev->channels();
 564                 if (!any_of(channels.begin(), channels.end(),
 565                         [](shared_ptr<Channel> channel) {
 566                                 return channel->enabled(); })) {
 567                         error_handler(tr("No channels enabled."));
 568                         return;
 569                 }
 570         }
 571
 572         // Clear signal data
 573         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 574                 d->clear();
 575
 576         trigger_list_.clear();
 577
 578         // Revert name back to default name (e.g. "Session 1") for real devices
 579         // as the (possibly saved) data is gone. File devices keep their name.
 580         shared_ptr<devices::HardwareDevice> hw_device =
 581                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 582
 583         if (hw_device) {
 584                 name_ = default_name_;
 585                 name_changed();
 586         }
 587
 588         // Begin the session
 589         sampling_thread_ = std::thread(
 590                 &Session::sample_thread_proc, this, error_handler);
 591 }
 592
 593 void Session::stop_capture()
 594 {
 595         if (get_capture_state() != Stopped)
 596                 device_->stop();
 597
 598         // Check that sampling stopped
 599         if (sampling_thread_.joinable())
 600                 sampling_thread_.join();
 601 }
 602
 603 void Session::register_view(shared_ptr<views::ViewBase> view)
 604 {
 605         if (views_.empty()) {
 606                 main_view_ = view;
 607         }
 608
 609         views_.push_back(view);
 610
 611         // Add all device signals
 612         update_signals();
 613
 614         // Add all other signals
 615         unordered_set< shared_ptr<data::SignalBase> > view_signalbases =
 616                 view->signalbases();
 617
 618         views::trace::View *trace_view =
 619                 qobject_cast<views::trace::View*>(view.get());
 620
 621         if (trace_view) {
 622                 for (shared_ptr<data::SignalBase> signalbase : signalbases_) {
 623                         const int sb_exists = count_if(
 624                                 view_signalbases.cbegin(), view_signalbases.cend(),
 625                                 [&](const shared_ptr<data::SignalBase> &sb) {
 626                                         return sb == signalbase;
 627                                 });
 628                         // Add the signal to the view as it doesn't have it yet
 629                         if (!sb_exists)
 630                                 switch (signalbase->type()) {
 631                                 case data::SignalBase::AnalogChannel:
 632                                 case data::SignalBase::LogicChannel:
 633                                 case data::SignalBase::DecodeChannel:
 634 #ifdef ENABLE_DECODE
 635                                         trace_view->add_decode_signal(
 636                                                 dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 637 #endif
 638                                         break;
 639                                 case data::SignalBase::MathChannel:
 640                                         // TBD
 641                                         break;
 642                                 }
 643                 }
 644         }
 645
 646         signals_changed();
 647 }
 648
 649 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 650 {
 651         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 652
 653         if (views_.empty()) {
 654                 main_view_.reset();
 655
 656                 // Without a view there can be no main bar
 657                 main_bar_.reset();
 658         }
 659 }
 660
 661 bool Session::has_view(shared_ptr<views::ViewBase> view)
 662 {
 663         for (shared_ptr<views::ViewBase> v : views_)
 664                 if (v == view)
 665                         return true;
 666
 667         return false;
 668 }
 669
 670 double Session::get_samplerate() const
 671 {
 672         double samplerate = 0.0;
 673
 674         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 675                 assert(d);
 676                 const vector< shared_ptr<pv::data::Segment> > segments =
 677                         d->segments();
 678                 for (const shared_ptr<pv::data::Segment> &s : segments)
 679                         samplerate = max(samplerate, s->samplerate());
 680         }
 681         // If there is no sample rate given we use samples as unit
 682         if (samplerate == 0.0)
 683                 samplerate = 1.0;
 684
 685         return samplerate;
 686 }
 687
 688 uint32_t Session::get_segment_count() const
 689 {
 690         uint32_t value = 0;
 691
 692         // Find the highest number of segments
 693         for (shared_ptr<data::SignalData> data : all_signal_data_)
 694                 if (data->get_segment_count() > value)
 695                         value = data->get_segment_count();
 696
 697         return value;
 698 }
 699
 700 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 701 {
 702         vector<util::Timestamp> result;
 703
 704         for (pair<uint32_t, util::Timestamp> entry : trigger_list_)
 705                 if (entry.first == segment_id)
 706                         result.push_back(entry.second);
 707
 708         return result;
 709 }
 710
 711 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 712 {
 713         return signalbases_;
 714 }
 715
 716 bool Session::all_segments_complete(uint32_t segment_id) const
 717 {
 718         bool all_complete = true;
 719
 720         for (shared_ptr<data::SignalBase> base : signalbases_)
 721                 if (!base->segment_is_complete(segment_id))
 722                         all_complete = false;
 723
 724         return all_complete;
 725 }
 726
 727 #ifdef ENABLE_DECODE
 728 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 729 {
 730         shared_ptr<data::DecodeSignal> signal;
 731
 732         try {
 733                 // Create the decode signal
 734                 signal = make_shared<data::DecodeSignal>(*this);
 735
 736                 signalbases_.insert(signal);
 737
 738                 // Add the decode signal to all views
 739                 for (shared_ptr<views::ViewBase> view : views_)
 740                         view->add_decode_signal(signal);
 741         } catch (runtime_error& e) {
 742                 remove_decode_signal(signal);
 743                 return nullptr;
 744         }
 745
 746         signals_changed();
 747
 748         return signal;
 749 }
 750
 751 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 752 {
 753         signalbases_.erase(signal);
 754
 755         for (shared_ptr<views::ViewBase> view : views_)
 756                 view->remove_decode_signal(signal);
 757
 758         signals_changed();
 759 }
 760 #endif
 761
 762 void Session::set_capture_state(capture_state state)
 763 {
 764         bool changed;
 765
 766         {
 767                 lock_guard<mutex> lock(sampling_mutex_);
 768                 changed = capture_state_ != state;
 769                 capture_state_ = state;
 770         }
 771
 772         if (changed)
 773                 capture_state_changed(state);
 774 }
 775
 776 void Session::update_signals()
 777 {
 778         if (!device_) {
 779                 signalbases_.clear();
 780                 logic_data_.reset();
 781                 for (shared_ptr<views::ViewBase> view : views_) {
 782                         view->clear_signals();
 783 #ifdef ENABLE_DECODE
 784                         view->clear_decode_signals();
 785 #endif
 786                 }
 787                 return;
 788         }
 789
 790         lock_guard<recursive_mutex> lock(data_mutex_);
 791
 792         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 793         if (!sr_dev) {
 794                 signalbases_.clear();
 795                 logic_data_.reset();
 796                 for (shared_ptr<views::ViewBase> view : views_) {
 797                         view->clear_signals();
 798 #ifdef ENABLE_DECODE
 799                         view->clear_decode_signals();
 800 #endif
 801                 }
 802                 return;
 803         }
 804
 805         // Detect what data types we will receive
 806         auto channels = sr_dev->channels();
 807         unsigned int logic_channel_count = count_if(
 808                 channels.begin(), channels.end(),
 809                 [] (shared_ptr<Channel> channel) {
 810                         return channel->type() == sigrok::ChannelType::LOGIC; });
 811
 812         // Create data containers for the logic data segments
 813         {
 814                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 815
 816                 if (logic_channel_count == 0) {
 817                         logic_data_.reset();
 818                 } else if (!logic_data_ ||
 819                         logic_data_->num_channels() != logic_channel_count) {
 820                         logic_data_.reset(new data::Logic(
 821                                 logic_channel_count));
 822                         assert(logic_data_);
 823                 }
 824         }
 825
 826         // Make the signals list
 827         for (shared_ptr<views::ViewBase> viewbase : views_) {
 828                 views::trace::View *trace_view =
 829                         qobject_cast<views::trace::View*>(viewbase.get());
 830
 831                 if (trace_view) {
 832                         unordered_set< shared_ptr<views::trace::Signal> >
 833                                 prev_sigs(trace_view->signals());
 834                         trace_view->clear_signals();
 835
 836                         for (auto channel : sr_dev->channels()) {
 837                                 shared_ptr<data::SignalBase> signalbase;
 838                                 shared_ptr<views::trace::Signal> signal;
 839
 840                                 // Find the channel in the old signals
 841                                 const auto iter = find_if(
 842                                         prev_sigs.cbegin(), prev_sigs.cend(),
 843                                         [&](const shared_ptr<views::trace::Signal> &s) {
 844                                                 return s->base()->channel() == channel;
 845                                         });
 846                                 if (iter != prev_sigs.end()) {
 847                                         // Copy the signal from the old set to the new
 848                                         signal = *iter;
 849                                         trace_view->add_signal(signal);
 850                                 } else {
 851                                         // Find the signalbase for this channel if possible
 852                                         signalbase.reset();
 853                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 854                                                 if (b->channel() == channel)
 855                                                         signalbase = b;
 856
 857                                         switch(channel->type()->id()) {
 858                                         case SR_CHANNEL_LOGIC:
 859                                                 if (!signalbase) {
 860                                                         signalbase = make_shared<data::SignalBase>(channel,
 861                                                                 data::SignalBase::LogicChannel);
 862                                                         signalbases_.insert(signalbase);
 863
 864                                                         all_signal_data_.insert(logic_data_);
 865                                                         signalbase->set_data(logic_data_);
 866
 867                                                         connect(this, SIGNAL(capture_state_changed(int)),
 868                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 869                                                 }
 870
 871                                                 signal = shared_ptr<views::trace::Signal>(
 872                                                         new views::trace::LogicSignal(*this,
 873                                                                 device_, signalbase));
 874                                                 trace_view->add_signal(signal);
 875                                                 break;
 876
 877                                         case SR_CHANNEL_ANALOG:
 878                                         {
 879                                                 if (!signalbase) {
 880                                                         signalbase = make_shared<data::SignalBase>(channel,
 881                                                                 data::SignalBase::AnalogChannel);
 882                                                         signalbases_.insert(signalbase);
 883
 884                                                         shared_ptr<data::Analog> data(new data::Analog());
 885                                                         all_signal_data_.insert(data);
 886                                                         signalbase->set_data(data);
 887
 888                                                         connect(this, SIGNAL(capture_state_changed(int)),
 889                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 890                                                 }
 891
 892                                                 signal = shared_ptr<views::trace::Signal>(
 893                                                         new views::trace::AnalogSignal(
 894                                                                 *this, signalbase));
 895                                                 trace_view->add_signal(signal);
 896                                                 break;
 897                                         }
 898
 899                                         default:
 900                                                 assert(false);
 901                                                 break;
 902                                         }
 903                                 }
 904                         }
 905                 }
 906         }
 907
 908         signals_changed();
 909 }
 910
 911 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 912         shared_ptr<sigrok::Channel> channel) const
 913 {
 914         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 915                 assert(sig);
 916                 if (sig->channel() == channel)
 917                         return sig;
 918         }
 919         return shared_ptr<data::SignalBase>();
 920 }
 921
 922 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 923 {
 924         assert(error_handler);
 925
 926         if (!device_)
 927                 return;
 928
 929         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 930
 931         out_of_memory_ = false;
 932
 933         {
 934                 lock_guard<recursive_mutex> lock(data_mutex_);
 935                 cur_logic_segment_.reset();
 936                 cur_analog_segments_.clear();
 937         }
 938         highest_segment_id_ = -1;
 939         frame_began_ = false;
 940
 941         try {
 942                 device_->start();
 943         } catch (Error& e) {
 944                 error_handler(e.what());
 945                 return;
 946         }
 947
 948         set_capture_state(device_->session()->trigger() ?
 949                 AwaitingTrigger : Running);
 950
 951         try {
 952                 device_->run();
 953         } catch (Error& e) {
 954                 error_handler(e.what());
 955                 set_capture_state(Stopped);
 956                 return;
 957         }
 958
 959         set_capture_state(Stopped);
 960
 961         // Confirm that SR_DF_END was received
 962         if (cur_logic_segment_)
 963                 qDebug() << "WARNING: SR_DF_END was not received.";
 964
 965         // Optimize memory usage
 966         free_unused_memory();
 967
 968         // We now have unsaved data unless we just "captured" from a file
 969         shared_ptr<devices::File> file_device =
 970                 dynamic_pointer_cast<devices::File>(device_);
 971
 972         if (!file_device)
 973                 data_saved_ = false;
 974
 975         if (out_of_memory_)
 976                 error_handler(tr("Out of memory, acquisition stopped."));
 977 }
 978
 979 void Session::free_unused_memory()
 980 {
 981         for (shared_ptr<data::SignalData> data : all_signal_data_) {
 982                 const vector< shared_ptr<data::Segment> > segments = data->segments();
 983
 984                 for (shared_ptr<data::Segment> segment : segments) {
 985                         segment->free_unused_memory();
 986                 }
 987         }
 988 }
 989
 990 void Session::signal_new_segment()
 991 {
 992         int new_segment_id = 0;
 993
 994         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
 995
 996                 // Determine new frame/segment number, assuming that all
 997                 // signals have the same number of frames/segments
 998                 if (cur_logic_segment_) {
 999                         new_segment_id = logic_data_->get_segment_count() - 1;
1000                 } else {
1001                         shared_ptr<sigrok::Channel> any_channel =
1002                                 (*cur_analog_segments_.begin()).first;
1003
1004                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1005                         assert(base);
1006
1007                         shared_ptr<data::Analog> data(base->analog_data());
1008                         assert(data);
1009
1010                         new_segment_id = data->get_segment_count() - 1;
1011                 }
1012         }
1013
1014         if (new_segment_id > highest_segment_id_) {
1015                 highest_segment_id_ = new_segment_id;
1016                 new_segment(highest_segment_id_);
1017         }
1018 }
1019
1020 void Session::signal_segment_completed()
1021 {
1022         int segment_id = 0;
1023
1024         for (shared_ptr<data::SignalBase> signalbase : signalbases_) {
1025                 // We only care about analog and logic channels, not derived ones
1026                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1027                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1028                         break;
1029                 }
1030
1031                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1032                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1033                         break;
1034                 }
1035         }
1036
1037         if (segment_id >= 0)
1038                 segment_completed(segment_id);
1039 }
1040
1041 void Session::feed_in_header()
1042 {
1043         // Nothing to do here for now
1044 }
1045
1046 void Session::feed_in_meta(shared_ptr<Meta> meta)
1047 {
1048         for (auto entry : meta->config()) {
1049                 switch (entry.first->id()) {
1050                 case SR_CONF_SAMPLERATE:
1051                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1052                         break;
1053                 default:
1054                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1055                         break;
1056                 }
1057         }
1058
1059         signals_changed();
1060 }
1061
1062 void Session::feed_in_trigger()
1063 {
1064         // The channel containing most samples should be most accurate
1065         uint64_t sample_count = 0;
1066
1067         {
1068                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
1069                         assert(d);
1070                         uint64_t temp_count = 0;
1071
1072                         const vector< shared_ptr<pv::data::Segment> > segments =
1073                                 d->segments();
1074                         for (const shared_ptr<pv::data::Segment> &s : segments)
1075                                 temp_count += s->get_sample_count();
1076
1077                         if (temp_count > sample_count)
1078                                 sample_count = temp_count;
1079                 }
1080         }
1081
1082         uint32_t segment_id = 0;  // Default segment when no frames are used
1083
1084         // If a frame began, we'd ideally be able to use the highest segment ID for
1085         // the trigger. However, as new segments are only created when logic or
1086         // analog data comes in, this doesn't work if the trigger appears right
1087         // after the beginning of the frame, before any sample data.
1088         // For this reason, we use highest segment ID + 1 if no sample data came in
1089         // yet and the highest segment ID otherwise.
1090         if (frame_began_) {
1091                 segment_id = highest_segment_id_;
1092                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1093                         segment_id++;
1094         }
1095
1096         // TODO Create timestamp from segment start time + segment's current sample count
1097         util::Timestamp timestamp = sample_count / get_samplerate();
1098         trigger_list_.emplace_back(segment_id, timestamp);
1099         trigger_event(segment_id, timestamp);
1100 }
1101
1102 void Session::feed_in_frame_begin()
1103 {
1104         frame_began_ = true;
1105 }
1106
1107 void Session::feed_in_frame_end()
1108 {
1109         if (!frame_began_)
1110                 return;
1111
1112         {
1113                 lock_guard<recursive_mutex> lock(data_mutex_);
1114
1115                 if (cur_logic_segment_)
1116                         cur_logic_segment_->set_complete();
1117
1118                 for (auto entry : cur_analog_segments_) {
1119                         shared_ptr<data::AnalogSegment> segment = entry.second;
1120                         segment->set_complete();
1121                 }
1122
1123                 cur_logic_segment_.reset();
1124                 cur_analog_segments_.clear();
1125         }
1126
1127         frame_began_ = false;
1128
1129         signal_segment_completed();
1130 }
1131
1132 void Session::feed_in_logic(shared_ptr<Logic> logic)
1133 {
1134         if (logic->data_length() == 0) {
1135                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1136                 return;
1137         }
1138
1139         if (!cur_samplerate_)
1140                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1141
1142         lock_guard<recursive_mutex> lock(data_mutex_);
1143
1144         if (!logic_data_) {
1145                 // The only reason logic_data_ would not have been created is
1146                 // if it was not possible to determine the signals when the
1147                 // device was created.
1148                 update_signals();
1149         }
1150
1151         if (!cur_logic_segment_) {
1152                 // This could be the first packet after a trigger
1153                 set_capture_state(Running);
1154
1155                 // Create a new data segment
1156                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1157                         *logic_data_, logic_data_->get_segment_count(),
1158                         logic->unit_size(), cur_samplerate_);
1159                 logic_data_->push_segment(cur_logic_segment_);
1160
1161                 signal_new_segment();
1162         }
1163
1164         cur_logic_segment_->append_payload(logic);
1165
1166         data_received();
1167 }
1168
1169 void Session::feed_in_analog(shared_ptr<Analog> analog)
1170 {
1171         if (analog->num_samples() == 0) {
1172                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1173                 return;
1174         }
1175
1176         if (!cur_samplerate_)
1177                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1178
1179         lock_guard<recursive_mutex> lock(data_mutex_);
1180
1181         const vector<shared_ptr<Channel>> channels = analog->channels();
1182         const unsigned int channel_count = channels.size();
1183         const size_t sample_count = analog->num_samples() / channel_count;
1184         bool sweep_beginning = false;
1185
1186         unique_ptr<float[]> data(new float[analog->num_samples()]);
1187         analog->get_data_as_float(data.get());
1188
1189         if (signalbases_.empty())
1190                 update_signals();
1191
1192         float *channel_data = data.get();
1193         for (auto channel : channels) {
1194                 shared_ptr<data::AnalogSegment> segment;
1195
1196                 // Try to get the segment of the channel
1197                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1198                         iterator iter = cur_analog_segments_.find(channel);
1199                 if (iter != cur_analog_segments_.end())
1200                         segment = (*iter).second;
1201                 else {
1202                         // If no segment was found, this means we haven't
1203                         // created one yet. i.e. this is the first packet
1204                         // in the sweep containing this segment.
1205                         sweep_beginning = true;
1206
1207                         // Find the analog data associated with the channel
1208                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1209                         assert(base);
1210
1211                         shared_ptr<data::Analog> data(base->analog_data());
1212                         assert(data);
1213
1214                         // Create a segment, keep it in the maps of channels
1215                         segment = make_shared<data::AnalogSegment>(
1216                                 *data, data->get_segment_count(), cur_samplerate_);
1217                         cur_analog_segments_[channel] = segment;
1218
1219                         // Push the segment into the analog data.
1220                         data->push_segment(segment);
1221
1222                         signal_new_segment();
1223                 }
1224
1225                 assert(segment);
1226
1227                 // Append the samples in the segment
1228                 segment->append_interleaved_samples(channel_data++, sample_count,
1229                         channel_count);
1230         }
1231
1232         if (sweep_beginning) {
1233                 // This could be the first packet after a trigger
1234                 set_capture_state(Running);
1235         }
1236
1237         data_received();
1238 }
1239
1240 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1241         shared_ptr<Packet> packet)
1242 {
1243         (void)device;
1244
1245         assert(device);
1246         assert(device == device_->device());
1247         assert(packet);
1248
1249         switch (packet->type()->id()) {
1250         case SR_DF_HEADER:
1251                 feed_in_header();
1252                 break;
1253
1254         case SR_DF_META:
1255                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1256                 break;
1257
1258         case SR_DF_TRIGGER:
1259                 feed_in_trigger();
1260                 break;
1261
1262         case SR_DF_LOGIC:
1263                 try {
1264                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1265                 } catch (bad_alloc&) {
1266                         out_of_memory_ = true;
1267                         device_->stop();
1268                 }
1269                 break;
1270
1271         case SR_DF_ANALOG:
1272                 try {
1273                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1274                 } catch (bad_alloc&) {
1275                         out_of_memory_ = true;
1276                         device_->stop();
1277                 }
1278                 break;
1279
1280         case SR_DF_FRAME_BEGIN:
1281                 feed_in_frame_begin();
1282                 break;
1283
1284         case SR_DF_FRAME_END:
1285                 feed_in_frame_end();
1286                 break;
1287
1288         case SR_DF_END:
1289                 // Strictly speaking, this is performed when a frame end marker was
1290                 // received, so there's no point doing this again. However, not all
1291                 // devices use frames, and for those devices, we need to do it here.
1292                 {
1293                         lock_guard<recursive_mutex> lock(data_mutex_);
1294
1295                         if (cur_logic_segment_)
1296                                 cur_logic_segment_->set_complete();
1297
1298                         for (auto entry : cur_analog_segments_) {
1299                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1300                                 segment->set_complete();
1301                         }
1302
1303                         cur_logic_segment_.reset();
1304                         cur_analog_segments_.clear();
1305                 }
1306                 break;
1307
1308         default:
1309                 break;
1310         }
1311 }
1312
1313 void Session::on_data_saved()
1314 {
1315         data_saved_ = true;
1316 }
1317
1318 } // namespace pv