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_FLOW
  56 #include <gstreamermm.h>
  57 #include <libsigrokflow/libsigrokflow.hpp>
  58 #endif
  59
  60 #ifdef ENABLE_DECODE
  61 #include <libsigrokdecode/libsigrokdecode.h>
  62 #include "data/decodesignal.hpp"
  63 #endif
  64
  65 using std::bad_alloc;
  66 using std::dynamic_pointer_cast;
  67 using std::find_if;
  68 using std::function;
  69 using std::lock_guard;
  70 using std::list;
  71 using std::make_pair;
  72 using std::make_shared;
  73 using std::map;
  74 using std::max;
  75 using std::move;
  76 using std::mutex;
  77 using std::pair;
  78 using std::recursive_mutex;
  79 using std::runtime_error;
  80 using std::shared_ptr;
  81 using std::string;
  82 #ifdef ENABLE_FLOW
  83 using std::unique_lock;
  84 #endif
  85 using std::unique_ptr;
  86 using std::unordered_set;
  87 using std::vector;
  88
  89 using sigrok::Analog;
  90 using sigrok::Channel;
  91 using sigrok::ConfigKey;
  92 using sigrok::DatafeedCallbackFunction;
  93 using sigrok::Error;
  94 using sigrok::InputFormat;
  95 using sigrok::Logic;
  96 using sigrok::Meta;
  97 using sigrok::Packet;
  98 using sigrok::Session;
  99
 100 using Glib::VariantBase;
 101
 102 #ifdef ENABLE_FLOW
 103 using Gst::Bus;
 104 using Gst::ElementFactory;
 105 using Gst::Pipeline;
 106 #endif
 107
 108 using pv::views::trace::Signal;
 109 using pv::views::trace::AnalogSignal;
 110 using pv::views::trace::LogicSignal;
 111
 112 namespace pv {
 113
 114 shared_ptr<sigrok::Context> Session::sr_context;
 115
 116 Session::Session(DeviceManager &device_manager, QString name) :
 117         device_manager_(device_manager),
 118         default_name_(name),
 119         name_(name),
 120         capture_state_(Stopped),
 121         cur_samplerate_(0),
 122         data_saved_(true)
 123 {
 124 }
 125
 126 Session::~Session()
 127 {
 128         // Stop and join to the thread
 129         stop_capture();
 130 }
 131
 132 DeviceManager& Session::device_manager()
 133 {
 134         return device_manager_;
 135 }
 136
 137 const DeviceManager& Session::device_manager() const
 138 {
 139         return device_manager_;
 140 }
 141
 142 shared_ptr<sigrok::Session> Session::session() const
 143 {
 144         if (!device_)
 145                 return shared_ptr<sigrok::Session>();
 146         return device_->session();
 147 }
 148
 149 shared_ptr<devices::Device> Session::device() const
 150 {
 151         return device_;
 152 }
 153
 154 QString Session::name() const
 155 {
 156         return name_;
 157 }
 158
 159 void Session::set_name(QString name)
 160 {
 161         if (default_name_.isEmpty())
 162                 default_name_ = name;
 163
 164         name_ = name;
 165
 166         name_changed();
 167 }
 168
 169 const list< shared_ptr<views::ViewBase> > Session::views() const
 170 {
 171         return views_;
 172 }
 173
 174 shared_ptr<views::ViewBase> Session::main_view() const
 175 {
 176         return main_view_;
 177 }
 178
 179 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 180 {
 181         main_bar_ = main_bar;
 182 }
 183
 184 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 185 {
 186         return main_bar_;
 187 }
 188
 189 bool Session::data_saved() const
 190 {
 191         return data_saved_;
 192 }
 193
 194 void Session::save_setup(QSettings &settings) const
 195 {
 196         int decode_signals = 0, views = 0;
 197
 198         // Save channels and decoders
 199         for (const shared_ptr<data::SignalBase>& base : signalbases_) {
 200 #ifdef ENABLE_DECODE
 201                 if (base->is_decode_signal()) {
 202                         settings.beginGroup("decode_signal" + QString::number(decode_signals++));
 203                         base->save_settings(settings);
 204                         settings.endGroup();
 205                 } else
 206 #endif
 207                 {
 208                         settings.beginGroup(base->internal_name());
 209                         base->save_settings(settings);
 210                         settings.endGroup();
 211                 }
 212         }
 213
 214         settings.setValue("decode_signals", decode_signals);
 215
 216         // Save view states and their signal settings
 217         // Note: main_view must be saved as view0
 218         settings.beginGroup("view" + QString::number(views++));
 219         main_view_->save_settings(settings);
 220         settings.endGroup();
 221
 222         for (const shared_ptr<views::ViewBase>& view : views_) {
 223                 if (view != main_view_) {
 224                         settings.beginGroup("view" + QString::number(views++));
 225                         settings.setValue("type", view->get_type());
 226                         view->save_settings(settings);
 227                         settings.endGroup();
 228                 }
 229         }
 230
 231         settings.setValue("views", views);
 232 }
 233
 234 void Session::save_settings(QSettings &settings) const
 235 {
 236         map<string, string> dev_info;
 237         list<string> key_list;
 238
 239         if (device_) {
 240                 shared_ptr<devices::HardwareDevice> hw_device =
 241                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 242
 243                 if (hw_device) {
 244                         settings.setValue("device_type", "hardware");
 245                         settings.beginGroup("device");
 246
 247                         key_list.emplace_back("vendor");
 248                         key_list.emplace_back("model");
 249                         key_list.emplace_back("version");
 250                         key_list.emplace_back("serial_num");
 251                         key_list.emplace_back("connection_id");
 252
 253                         dev_info = device_manager_.get_device_info(device_);
 254
 255                         for (string& key : key_list) {
 256                                 if (dev_info.count(key))
 257                                         settings.setValue(QString::fromUtf8(key.c_str()),
 258                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 259                                 else
 260                                         settings.remove(QString::fromUtf8(key.c_str()));
 261                         }
 262
 263                         settings.endGroup();
 264                 }
 265
 266                 shared_ptr<devices::SessionFile> sessionfile_device =
 267                         dynamic_pointer_cast<devices::SessionFile>(device_);
 268
 269                 if (sessionfile_device) {
 270                         settings.setValue("device_type", "sessionfile");
 271                         settings.beginGroup("device");
 272                         settings.setValue("filename", QString::fromStdString(
 273                                 sessionfile_device->full_name()));
 274                         settings.endGroup();
 275                 }
 276
 277                 shared_ptr<devices::InputFile> inputfile_device =
 278                         dynamic_pointer_cast<devices::InputFile>(device_);
 279
 280                 if (inputfile_device) {
 281                         settings.setValue("device_type", "inputfile");
 282                         settings.beginGroup("device");
 283                         inputfile_device->save_meta_to_settings(settings);
 284                         settings.endGroup();
 285                 }
 286
 287                 save_setup(settings);
 288         }
 289 }
 290
 291 void Session::restore_setup(QSettings &settings)
 292 {
 293         // Restore channels
 294         for (shared_ptr<data::SignalBase> base : signalbases_) {
 295                 settings.beginGroup(base->internal_name());
 296                 base->restore_settings(settings);
 297                 settings.endGroup();
 298         }
 299
 300         // Restore decoders
 301 #ifdef ENABLE_DECODE
 302         int decode_signals = settings.value("decode_signals").toInt();
 303
 304         for (int i = 0; i < decode_signals; i++) {
 305                 settings.beginGroup("decode_signal" + QString::number(i));
 306                 shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 307                 signal->restore_settings(settings);
 308                 settings.endGroup();
 309         }
 310 #endif
 311
 312         // Restore views
 313         int views = settings.value("views").toInt();
 314
 315         for (int i = 0; i < views; i++) {
 316                 settings.beginGroup("view" + QString::number(i));
 317
 318                 if (i > 0) {
 319                         views::ViewType type = (views::ViewType)settings.value("type").toInt();
 320                         add_view(type, this);
 321                         views_.back()->restore_settings(settings);
 322                 } else
 323                         main_view_->restore_settings(settings);
 324
 325                 settings.endGroup();
 326         }
 327 }
 328
 329 void Session::restore_settings(QSettings &settings)
 330 {
 331         shared_ptr<devices::Device> device;
 332
 333         QString device_type = settings.value("device_type").toString();
 334
 335         if (device_type == "hardware") {
 336                 map<string, string> dev_info;
 337                 list<string> key_list;
 338
 339                 // Re-select last used device if possible but only if it's not demo
 340                 settings.beginGroup("device");
 341                 key_list.emplace_back("vendor");
 342                 key_list.emplace_back("model");
 343                 key_list.emplace_back("version");
 344                 key_list.emplace_back("serial_num");
 345                 key_list.emplace_back("connection_id");
 346
 347                 for (string key : key_list) {
 348                         const QString k = QString::fromStdString(key);
 349                         if (!settings.contains(k))
 350                                 continue;
 351
 352                         const string value = settings.value(k).toString().toStdString();
 353                         if (!value.empty())
 354                                 dev_info.insert(make_pair(key, value));
 355                 }
 356
 357                 if (dev_info.count("model") > 0)
 358                         device = device_manager_.find_device_from_info(dev_info);
 359
 360                 if (device)
 361                         set_device(device);
 362
 363                 settings.endGroup();
 364         }
 365
 366         if ((device_type == "sessionfile") || (device_type == "inputfile")) {
 367                 if (device_type == "sessionfile") {
 368                         settings.beginGroup("device");
 369                         QString filename = settings.value("filename").toString();
 370                         settings.endGroup();
 371
 372                         if (QFileInfo(filename).isReadable()) {
 373                                 device = make_shared<devices::SessionFile>(device_manager_.context(),
 374                                         filename.toStdString());
 375                         }
 376                 }
 377
 378                 if (device_type == "inputfile") {
 379                         settings.beginGroup("device");
 380                         device = make_shared<devices::InputFile>(device_manager_.context(),
 381                                 settings);
 382                         settings.endGroup();
 383                 }
 384
 385                 if (device) {
 386                         set_device(device);
 387
 388                         start_capture([](QString infoMessage) {
 389                                 // TODO Emulate noquote()
 390                                 qDebug() << "Session error:" << infoMessage; });
 391
 392                         set_name(QString::fromStdString(
 393                                 dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 394                 }
 395         }
 396
 397         if (device)
 398                 restore_setup(settings);
 399 }
 400
 401 void Session::select_device(shared_ptr<devices::Device> device)
 402 {
 403         try {
 404                 if (device)
 405                         set_device(device);
 406                 else
 407                         set_default_device();
 408         } catch (const QString &e) {
 409                 MainWindow::show_session_error(tr("Failed to select device"), e);
 410         }
 411 }
 412
 413 void Session::set_device(shared_ptr<devices::Device> device)
 414 {
 415         assert(device);
 416
 417         // Ensure we are not capturing before setting the device
 418         stop_capture();
 419
 420         if (device_)
 421                 device_->close();
 422
 423         device_.reset();
 424
 425         // Revert name back to default name (e.g. "Session 1") as the data is gone
 426         name_ = default_name_;
 427         name_changed();
 428
 429         // Remove all stored data and reset all views
 430         for (shared_ptr<views::ViewBase> view : views_) {
 431                 view->clear_signals();
 432 #ifdef ENABLE_DECODE
 433                 view->clear_decode_signals();
 434 #endif
 435                 view->reset_view_state();
 436         }
 437         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 438                 d->clear();
 439         all_signal_data_.clear();
 440         signalbases_.clear();
 441         cur_logic_segment_.reset();
 442
 443         for (auto& entry : cur_analog_segments_) {
 444                 shared_ptr<sigrok::Channel>(entry.first).reset();
 445                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 446         }
 447
 448         logic_data_.reset();
 449
 450         signals_changed();
 451
 452         device_ = move(device);
 453
 454         try {
 455                 device_->open();
 456         } catch (const QString &e) {
 457                 device_.reset();
 458                 MainWindow::show_session_error(tr("Failed to open device"), e);
 459         }
 460
 461         if (device_) {
 462                 device_->session()->add_datafeed_callback([=]
 463                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 464                                 data_feed_in(device, packet);
 465                         });
 466
 467                 update_signals();
 468         }
 469
 470         device_changed();
 471 }
 472
 473 void Session::set_default_device()
 474 {
 475         const list< shared_ptr<devices::HardwareDevice> > &devices =
 476                 device_manager_.devices();
 477
 478         if (devices.empty())
 479                 return;
 480
 481         // Try and find the demo device and select that by default
 482         const auto iter = find_if(devices.begin(), devices.end(),
 483                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 484                         return d->hardware_device()->driver()->name() == "demo"; });
 485         set_device((iter == devices.end()) ? devices.front() : *iter);
 486 }
 487
 488 bool Session::using_file_device() const
 489 {
 490         shared_ptr<devices::SessionFile> sessionfile_device =
 491                 dynamic_pointer_cast<devices::SessionFile>(device_);
 492
 493         shared_ptr<devices::InputFile> inputfile_device =
 494                 dynamic_pointer_cast<devices::InputFile>(device_);
 495
 496         return (sessionfile_device || inputfile_device);
 497 }
 498
 499 /**
 500  * Convert generic options to data types that are specific to InputFormat.
 501  *
 502  * @param[in] user_spec Vector of tokenized words, string format.
 503  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 504  *
 505  * @return Map of options suitable for InputFormat::create_input().
 506  */
 507 map<string, Glib::VariantBase>
 508 Session::input_format_options(vector<string> user_spec,
 509                 map<string, shared_ptr<Option>> fmt_opts)
 510 {
 511         map<string, Glib::VariantBase> result;
 512
 513         for (auto& entry : user_spec) {
 514                 /*
 515                  * Split key=value specs. Accept entries without separator
 516                  * (for simplified boolean specifications).
 517                  */
 518                 string key, val;
 519                 size_t pos = entry.find("=");
 520                 if (pos == std::string::npos) {
 521                         key = entry;
 522                         val = "";
 523                 } else {
 524                         key = entry.substr(0, pos);
 525                         val = entry.substr(pos + 1);
 526                 }
 527
 528                 /*
 529                  * Skip user specifications that are not a member of the
 530                  * format's set of supported options. Have the text input
 531                  * spec converted to the required input format specific
 532                  * data type.
 533                  */
 534                 auto found = fmt_opts.find(key);
 535                 if (found == fmt_opts.end())
 536                         continue;
 537                 shared_ptr<Option> opt = found->second;
 538                 result[key] = opt->parse_string(val);
 539         }
 540
 541         return result;
 542 }
 543
 544 void Session::load_init_file(const string &file_name,
 545         const string &format, const string &setup_file_name)
 546 {
 547         shared_ptr<InputFormat> input_format;
 548         map<string, Glib::VariantBase> input_opts;
 549
 550         if (!format.empty()) {
 551                 const map<string, shared_ptr<InputFormat> > formats =
 552                         device_manager_.context()->input_formats();
 553                 auto user_opts = pv::util::split_string(format, ":");
 554                 string user_name = user_opts.front();
 555                 user_opts.erase(user_opts.begin());
 556                 const auto iter = find_if(formats.begin(), formats.end(),
 557                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 558                                 return f.first == user_name; });
 559                 if (iter == formats.end()) {
 560                         MainWindow::show_session_error(tr("Error"),
 561                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 562                         return;
 563                 }
 564                 input_format = (*iter).second;
 565                 input_opts = input_format_options(user_opts,
 566                         input_format->options());
 567         }
 568
 569         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 570                 input_format, input_opts);
 571 }
 572
 573 void Session::load_file(QString file_name, QString setup_file_name,
 574         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 575 {
 576         const QString errorMessage(
 577                 QString("Failed to load file %1").arg(file_name));
 578
 579         // In the absence of a caller's format spec, try to auto detect.
 580         // Assume "sigrok session file" upon lookup miss.
 581         if (!format)
 582                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 583         try {
 584                 if (format)
 585                         set_device(shared_ptr<devices::Device>(
 586                                 new devices::InputFile(
 587                                         device_manager_.context(),
 588                                         file_name.toStdString(),
 589                                         format, options)));
 590                 else
 591                         set_device(shared_ptr<devices::Device>(
 592                                 new devices::SessionFile(
 593                                         device_manager_.context(),
 594                                         file_name.toStdString())));
 595         } catch (Error& e) {
 596                 MainWindow::show_session_error(tr("Failed to load %1").arg(file_name), e.what());
 597                 set_default_device();
 598                 main_bar_->update_device_list();
 599                 return;
 600         }
 601
 602         // Use the input file with .pvs extension if no setup file was given
 603         if (setup_file_name.isEmpty()) {
 604                 setup_file_name = file_name;
 605                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 606                 setup_file_name.append(".pvs");
 607         }
 608
 609         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 610                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 611                 restore_setup(settings_storage);
 612         }
 613
 614         main_bar_->update_device_list();
 615
 616         start_capture([&, errorMessage](QString infoMessage) {
 617                 MainWindow::show_session_error(errorMessage, infoMessage); });
 618
 619         set_name(QFileInfo(file_name).fileName());
 620 }
 621
 622 Session::capture_state Session::get_capture_state() const
 623 {
 624         lock_guard<mutex> lock(sampling_mutex_);
 625         return capture_state_;
 626 }
 627
 628 void Session::start_capture(function<void (const QString)> error_handler)
 629 {
 630         if (!device_) {
 631                 error_handler(tr("No active device set, can't start acquisition."));
 632                 return;
 633         }
 634
 635         stop_capture();
 636
 637         // Check that at least one channel is enabled
 638         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 639         if (sr_dev) {
 640                 const auto channels = sr_dev->channels();
 641                 if (!any_of(channels.begin(), channels.end(),
 642                         [](shared_ptr<Channel> channel) {
 643                                 return channel->enabled(); })) {
 644                         error_handler(tr("No channels enabled."));
 645                         return;
 646                 }
 647         }
 648
 649         // Clear signal data
 650         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 651                 d->clear();
 652
 653         trigger_list_.clear();
 654
 655         // Revert name back to default name (e.g. "Session 1") for real devices
 656         // as the (possibly saved) data is gone. File devices keep their name.
 657         shared_ptr<devices::HardwareDevice> hw_device =
 658                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 659
 660         if (hw_device) {
 661                 name_ = default_name_;
 662                 name_changed();
 663         }
 664
 665         // Begin the session
 666         sampling_thread_ = std::thread(
 667                 &Session::sample_thread_proc, this, error_handler);
 668 }
 669
 670 void Session::stop_capture()
 671 {
 672         if (get_capture_state() != Stopped)
 673                 device_->stop();
 674
 675         // Check that sampling stopped
 676         if (sampling_thread_.joinable())
 677                 sampling_thread_.join();
 678 }
 679
 680 void Session::register_view(shared_ptr<views::ViewBase> view)
 681 {
 682         if (views_.empty())
 683                 main_view_ = view;
 684
 685         views_.push_back(view);
 686
 687         // Add all device signals
 688         update_signals();
 689
 690         // Add all other signals
 691         unordered_set< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
 692
 693         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 694                 const int sb_exists = count_if(
 695                         view_signalbases.cbegin(), view_signalbases.cend(),
 696                         [&](const shared_ptr<data::SignalBase> &sb) {
 697                                 return sb == signalbase;
 698                         });
 699
 700                 // Add the signal to the view if it doesn't have it yet
 701                 if (!sb_exists)
 702                         switch (signalbase->type()) {
 703                         case data::SignalBase::AnalogChannel:
 704                         case data::SignalBase::LogicChannel:
 705                         case data::SignalBase::MathChannel:
 706                                 view->add_signalbase(signalbase);
 707                                 break;
 708                         case data::SignalBase::DecodeChannel:
 709 #ifdef ENABLE_DECODE
 710                                 view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 711 #endif
 712                                 break;
 713                         }
 714         }
 715
 716         signals_changed();
 717 }
 718
 719 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 720 {
 721         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 722
 723         if (views_.empty()) {
 724                 main_view_.reset();
 725
 726                 // Without a view there can be no main bar
 727                 main_bar_.reset();
 728         }
 729 }
 730
 731 bool Session::has_view(shared_ptr<views::ViewBase> view)
 732 {
 733         for (shared_ptr<views::ViewBase>& v : views_)
 734                 if (v == view)
 735                         return true;
 736
 737         return false;
 738 }
 739
 740 double Session::get_samplerate() const
 741 {
 742         double samplerate = 0.0;
 743
 744         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 745                 assert(d);
 746                 const vector< shared_ptr<pv::data::Segment> > segments =
 747                         d->segments();
 748                 for (const shared_ptr<pv::data::Segment>& s : segments)
 749                         samplerate = max(samplerate, s->samplerate());
 750         }
 751         // If there is no sample rate given we use samples as unit
 752         if (samplerate == 0.0)
 753                 samplerate = 1.0;
 754
 755         return samplerate;
 756 }
 757
 758 uint32_t Session::get_segment_count() const
 759 {
 760         uint32_t value = 0;
 761
 762         // Find the highest number of segments
 763         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 764                 if (data->get_segment_count() > value)
 765                         value = data->get_segment_count();
 766
 767         return value;
 768 }
 769
 770 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 771 {
 772         vector<util::Timestamp> result;
 773
 774         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 775                 if (entry.first == segment_id)
 776                         result.push_back(entry.second);
 777
 778         return result;
 779 }
 780
 781 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 782 {
 783         return signalbases_;
 784 }
 785
 786 bool Session::all_segments_complete(uint32_t segment_id) const
 787 {
 788         bool all_complete = true;
 789
 790         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 791                 if (!base->segment_is_complete(segment_id))
 792                         all_complete = false;
 793
 794         return all_complete;
 795 }
 796
 797 #ifdef ENABLE_DECODE
 798 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 799 {
 800         shared_ptr<data::DecodeSignal> signal;
 801
 802         try {
 803                 // Create the decode signal
 804                 signal = make_shared<data::DecodeSignal>(*this);
 805
 806                 signalbases_.insert(signal);
 807
 808                 // Add the decode signal to all views
 809                 for (shared_ptr<views::ViewBase>& view : views_)
 810                         view->add_decode_signal(signal);
 811         } catch (runtime_error& e) {
 812                 remove_decode_signal(signal);
 813                 return nullptr;
 814         }
 815
 816         signals_changed();
 817
 818         return signal;
 819 }
 820
 821 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 822 {
 823         signalbases_.erase(signal);
 824
 825         for (shared_ptr<views::ViewBase>& view : views_)
 826                 view->remove_decode_signal(signal);
 827
 828         signals_changed();
 829 }
 830 #endif
 831
 832 void Session::set_capture_state(capture_state state)
 833 {
 834         bool changed;
 835
 836         if (state == Running)
 837                 acq_time_.restart();
 838         if (state == Stopped)
 839                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 840
 841         {
 842                 lock_guard<mutex> lock(sampling_mutex_);
 843                 changed = capture_state_ != state;
 844                 capture_state_ = state;
 845         }
 846
 847         if (changed)
 848                 capture_state_changed(state);
 849 }
 850
 851 void Session::update_signals()
 852 {
 853         if (!device_) {
 854                 signalbases_.clear();
 855                 logic_data_.reset();
 856                 for (shared_ptr<views::ViewBase>& view : views_) {
 857                         view->clear_signals();
 858 #ifdef ENABLE_DECODE
 859                         view->clear_decode_signals();
 860 #endif
 861                 }
 862                 return;
 863         }
 864
 865         lock_guard<recursive_mutex> lock(data_mutex_);
 866
 867         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 868         if (!sr_dev) {
 869                 signalbases_.clear();
 870                 logic_data_.reset();
 871                 for (shared_ptr<views::ViewBase>& view : views_) {
 872                         view->clear_signals();
 873 #ifdef ENABLE_DECODE
 874                         view->clear_decode_signals();
 875 #endif
 876                 }
 877                 return;
 878         }
 879
 880         // Detect what data types we will receive
 881         auto channels = sr_dev->channels();
 882         unsigned int logic_channel_count = count_if(
 883                 channels.begin(), channels.end(),
 884                 [] (shared_ptr<Channel> channel) {
 885                         return channel->type() == sigrok::ChannelType::LOGIC; });
 886
 887         // Create data containers for the logic data segments
 888         {
 889                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 890
 891                 if (logic_channel_count == 0) {
 892                         logic_data_.reset();
 893                 } else if (!logic_data_ ||
 894                         logic_data_->num_channels() != logic_channel_count) {
 895                         logic_data_.reset(new data::Logic(
 896                                 logic_channel_count));
 897                         assert(logic_data_);
 898                 }
 899         }
 900
 901         // Make the signals list
 902         for (shared_ptr<views::ViewBase>& viewbase : views_) {
 903                 views::trace::View *trace_view =
 904                         qobject_cast<views::trace::View*>(viewbase.get());
 905
 906                 if (trace_view) {
 907                         unordered_set< shared_ptr<Signal> > prev_sigs(trace_view->signals());
 908                         trace_view->clear_signals();
 909
 910                         for (auto channel : sr_dev->channels()) {
 911                                 shared_ptr<data::SignalBase> signalbase;
 912                                 shared_ptr<Signal> signal;
 913
 914                                 // Find the channel in the old signals
 915                                 const auto iter = find_if(
 916                                         prev_sigs.cbegin(), prev_sigs.cend(),
 917                                         [&](const shared_ptr<Signal> &s) {
 918                                                 return s->base()->channel() == channel;
 919                                         });
 920                                 if (iter != prev_sigs.end()) {
 921                                         // Copy the signal from the old set to the new
 922                                         signal = *iter;
 923                                         trace_view->add_signal(signal);
 924                                 } else {
 925                                         // Find the signalbase for this channel if possible
 926                                         signalbase.reset();
 927                                         for (const shared_ptr<data::SignalBase>& b : signalbases_)
 928                                                 if (b->channel() == channel)
 929                                                         signalbase = b;
 930
 931                                         shared_ptr<Signal> signal;
 932
 933                                         switch(channel->type()->id()) {
 934                                         case SR_CHANNEL_LOGIC:
 935                                                 if (!signalbase) {
 936                                                         signalbase = make_shared<data::SignalBase>(channel,
 937                                                                 data::SignalBase::LogicChannel);
 938                                                         signalbases_.insert(signalbase);
 939
 940                                                         all_signal_data_.insert(logic_data_);
 941                                                         signalbase->set_data(logic_data_);
 942
 943                                                         connect(this, SIGNAL(capture_state_changed(int)),
 944                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 945                                                 }
 946
 947                                                 signal = shared_ptr<Signal>(new LogicSignal(*this, device_, signalbase));
 948                                                 break;
 949
 950                                         case SR_CHANNEL_ANALOG:
 951                                         {
 952                                                 if (!signalbase) {
 953                                                         signalbase = make_shared<data::SignalBase>(channel,
 954                                                                 data::SignalBase::AnalogChannel);
 955                                                         signalbases_.insert(signalbase);
 956
 957                                                         shared_ptr<data::Analog> data(new data::Analog());
 958                                                         all_signal_data_.insert(data);
 959                                                         signalbase->set_data(data);
 960
 961                                                         connect(this, SIGNAL(capture_state_changed(int)),
 962                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 963                                                 }
 964
 965                                                 signal = shared_ptr<Signal>(new AnalogSignal(*this, signalbase));
 966                                                 break;
 967                                         }
 968
 969                                         default:
 970                                                 assert(false);
 971                                                 break;
 972                                         }
 973
 974                                         // New views take their signal settings from the main view
 975                                         if (!viewbase->is_main_view()) {
 976                                                 shared_ptr<pv::views::trace::View> main_tv =
 977                                                         dynamic_pointer_cast<pv::views::trace::View>(main_view_);
 978                                                 shared_ptr<Signal> main_signal =
 979                                                         main_tv->get_signal_by_signalbase(signalbase);
 980                                                 signal->restore_settings(main_signal->save_settings());
 981                                         }
 982
 983                                         trace_view->add_signal(signal);
 984                                 }
 985                         }
 986                 }
 987         }
 988
 989         signals_changed();
 990 }
 991
 992 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 993         shared_ptr<sigrok::Channel> channel) const
 994 {
 995         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 996                 assert(sig);
 997                 if (sig->channel() == channel)
 998                         return sig;
 999         }
1000         return shared_ptr<data::SignalBase>();
1001 }
1002
1003 void Session::sample_thread_proc(function<void (const QString)> error_handler)
1004 {
1005         assert(error_handler);
1006
1007 #ifdef ENABLE_FLOW
1008         pipeline_ = Pipeline::create();
1009
1010         source_ = ElementFactory::create_element("filesrc", "source");
1011         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
1012
1013         pipeline_->add(source_)->add(sink_);
1014         source_->link(sink_);
1015
1016         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1017
1018         sink_->set_property("emit-signals", TRUE);
1019         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1020
1021         // Get the bus from the pipeline and add a bus watch to the default main context
1022         RefPtr<Bus> bus = pipeline_->get_bus();
1023         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1024
1025         // Start pipeline and Wait until it finished processing
1026         pipeline_done_interrupt_ = false;
1027         pipeline_->set_state(Gst::STATE_PLAYING);
1028
1029         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1030         pipeline_done_cond_.wait(pipeline_done_lock_);
1031
1032         // Let the pipeline free all resources
1033         pipeline_->set_state(Gst::STATE_NULL);
1034
1035 #else
1036         if (!device_)
1037                 return;
1038
1039         try {
1040                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1041         } catch (Error& e) {
1042                 cur_samplerate_ = 0;
1043         }
1044
1045         out_of_memory_ = false;
1046
1047         {
1048                 lock_guard<recursive_mutex> lock(data_mutex_);
1049                 cur_logic_segment_.reset();
1050                 cur_analog_segments_.clear();
1051         }
1052         highest_segment_id_ = -1;
1053         frame_began_ = false;
1054
1055         try {
1056                 device_->start();
1057         } catch (Error& e) {
1058                 error_handler(e.what());
1059                 return;
1060         }
1061
1062         set_capture_state(device_->session()->trigger() ?
1063                 AwaitingTrigger : Running);
1064
1065         try {
1066                 device_->run();
1067         } catch (Error& e) {
1068                 error_handler(e.what());
1069                 set_capture_state(Stopped);
1070                 return;
1071         } catch (QString& e) {
1072                 error_handler(e);
1073                 set_capture_state(Stopped);
1074                 return;
1075         }
1076
1077         set_capture_state(Stopped);
1078
1079         // Confirm that SR_DF_END was received
1080         if (cur_logic_segment_)
1081                 qDebug() << "WARNING: SR_DF_END was not received.";
1082 #endif
1083
1084         // Optimize memory usage
1085         free_unused_memory();
1086
1087         // We now have unsaved data unless we just "captured" from a file
1088         shared_ptr<devices::File> file_device =
1089                 dynamic_pointer_cast<devices::File>(device_);
1090
1091         if (!file_device)
1092                 data_saved_ = false;
1093
1094         if (out_of_memory_)
1095                 error_handler(tr("Out of memory, acquisition stopped."));
1096 }
1097
1098 void Session::free_unused_memory()
1099 {
1100         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1101                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1102
1103                 for (const shared_ptr<data::Segment>& segment : segments)
1104                         segment->free_unused_memory();
1105         }
1106 }
1107
1108 void Session::signal_new_segment()
1109 {
1110         int new_segment_id = 0;
1111
1112         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1113
1114                 // Determine new frame/segment number, assuming that all
1115                 // signals have the same number of frames/segments
1116                 if (cur_logic_segment_) {
1117                         new_segment_id = logic_data_->get_segment_count() - 1;
1118                 } else {
1119                         shared_ptr<sigrok::Channel> any_channel =
1120                                 (*cur_analog_segments_.begin()).first;
1121
1122                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1123                         assert(base);
1124
1125                         shared_ptr<data::Analog> data(base->analog_data());
1126                         assert(data);
1127
1128                         new_segment_id = data->get_segment_count() - 1;
1129                 }
1130         }
1131
1132         if (new_segment_id > highest_segment_id_) {
1133                 highest_segment_id_ = new_segment_id;
1134                 new_segment(highest_segment_id_);
1135         }
1136 }
1137
1138 void Session::signal_segment_completed()
1139 {
1140         int segment_id = 0;
1141
1142         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1143                 // We only care about analog and logic channels, not derived ones
1144                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1145                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1146                         break;
1147                 }
1148
1149                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1150                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1151                         break;
1152                 }
1153         }
1154
1155         if (segment_id >= 0)
1156                 segment_completed(segment_id);
1157 }
1158
1159 #ifdef ENABLE_FLOW
1160 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1161 {
1162         (void)bus;
1163
1164         if ((message->get_source() == pipeline_) && \
1165                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1166                 pipeline_done_cond_.notify_one();
1167
1168         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1169
1170         return true;
1171 }
1172
1173 Gst::FlowReturn Session::on_gst_new_sample()
1174 {
1175         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1176         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1177
1178         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1179                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1180                 Gst::MapInfo mapinfo;
1181                 buf_mem->map(mapinfo, Gst::MAP_READ);
1182
1183                 shared_ptr<sigrok::Packet> logic_packet =
1184                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1185
1186                 try {
1187                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1188                 } catch (bad_alloc&) {
1189                         out_of_memory_ = true;
1190                         device_->stop();
1191                         buf_mem->unmap(mapinfo);
1192                         return Gst::FLOW_ERROR;
1193                 }
1194
1195                 buf_mem->unmap(mapinfo);
1196         }
1197
1198         return Gst::FLOW_OK;
1199 }
1200 #endif
1201
1202 void Session::feed_in_header()
1203 {
1204         // Nothing to do here for now
1205 }
1206
1207 void Session::feed_in_meta(shared_ptr<Meta> meta)
1208 {
1209         for (auto& entry : meta->config()) {
1210                 switch (entry.first->id()) {
1211                 case SR_CONF_SAMPLERATE:
1212                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1213                         break;
1214                 default:
1215                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1216                         break;
1217                 }
1218         }
1219
1220         signals_changed();
1221 }
1222
1223 void Session::feed_in_trigger()
1224 {
1225         // The channel containing most samples should be most accurate
1226         uint64_t sample_count = 0;
1227
1228         {
1229                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1230                         assert(d);
1231                         uint64_t temp_count = 0;
1232
1233                         const vector< shared_ptr<pv::data::Segment> > segments =
1234                                 d->segments();
1235                         for (const shared_ptr<pv::data::Segment> &s : segments)
1236                                 temp_count += s->get_sample_count();
1237
1238                         if (temp_count > sample_count)
1239                                 sample_count = temp_count;
1240                 }
1241         }
1242
1243         uint32_t segment_id = 0;  // Default segment when no frames are used
1244
1245         // If a frame began, we'd ideally be able to use the highest segment ID for
1246         // the trigger. However, as new segments are only created when logic or
1247         // analog data comes in, this doesn't work if the trigger appears right
1248         // after the beginning of the frame, before any sample data.
1249         // For this reason, we use highest segment ID + 1 if no sample data came in
1250         // yet and the highest segment ID otherwise.
1251         if (frame_began_) {
1252                 segment_id = highest_segment_id_;
1253                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1254                         segment_id++;
1255         }
1256
1257         // TODO Create timestamp from segment start time + segment's current sample count
1258         util::Timestamp timestamp = sample_count / get_samplerate();
1259         trigger_list_.emplace_back(segment_id, timestamp);
1260         trigger_event(segment_id, timestamp);
1261 }
1262
1263 void Session::feed_in_frame_begin()
1264 {
1265         frame_began_ = true;
1266 }
1267
1268 void Session::feed_in_frame_end()
1269 {
1270         if (!frame_began_)
1271                 return;
1272
1273         {
1274                 lock_guard<recursive_mutex> lock(data_mutex_);
1275
1276                 if (cur_logic_segment_)
1277                         cur_logic_segment_->set_complete();
1278
1279                 for (auto& entry : cur_analog_segments_) {
1280                         shared_ptr<data::AnalogSegment> segment = entry.second;
1281                         segment->set_complete();
1282                 }
1283
1284                 cur_logic_segment_.reset();
1285                 cur_analog_segments_.clear();
1286         }
1287
1288         frame_began_ = false;
1289
1290         signal_segment_completed();
1291 }
1292
1293 void Session::feed_in_logic(shared_ptr<Logic> logic)
1294 {
1295         if (logic->data_length() == 0) {
1296                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1297                 return;
1298         }
1299
1300         if (logic->unit_size() > 8)
1301                 throw QString(tr("Can't handle more than 64 logic channels."));
1302
1303         if (!cur_samplerate_)
1304                 try {
1305                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1306                 } catch (Error& e) {
1307                         // Do nothing
1308                 }
1309
1310         lock_guard<recursive_mutex> lock(data_mutex_);
1311
1312         if (!logic_data_) {
1313                 // The only reason logic_data_ would not have been created is
1314                 // if it was not possible to determine the signals when the
1315                 // device was created.
1316                 update_signals();
1317         }
1318
1319         if (!cur_logic_segment_) {
1320                 // This could be the first packet after a trigger
1321                 set_capture_state(Running);
1322
1323                 // Create a new data segment
1324                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1325                         *logic_data_, logic_data_->get_segment_count(),
1326                         logic->unit_size(), cur_samplerate_);
1327                 logic_data_->push_segment(cur_logic_segment_);
1328
1329                 signal_new_segment();
1330         }
1331
1332         cur_logic_segment_->append_payload(logic);
1333
1334         data_received();
1335 }
1336
1337 void Session::feed_in_analog(shared_ptr<Analog> analog)
1338 {
1339         if (analog->num_samples() == 0) {
1340                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1341                 return;
1342         }
1343
1344         if (!cur_samplerate_)
1345                 try {
1346                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1347                 } catch (Error& e) {
1348                         // Do nothing
1349                 }
1350
1351         lock_guard<recursive_mutex> lock(data_mutex_);
1352
1353         const vector<shared_ptr<Channel>> channels = analog->channels();
1354         bool sweep_beginning = false;
1355
1356         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1357         analog->get_data_as_float(data.get());
1358
1359         if (signalbases_.empty())
1360                 update_signals();
1361
1362         float *channel_data = data.get();
1363         for (auto& channel : channels) {
1364                 shared_ptr<data::AnalogSegment> segment;
1365
1366                 // Try to get the segment of the channel
1367                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1368                         iterator iter = cur_analog_segments_.find(channel);
1369                 if (iter != cur_analog_segments_.end())
1370                         segment = (*iter).second;
1371                 else {
1372                         // If no segment was found, this means we haven't
1373                         // created one yet. i.e. this is the first packet
1374                         // in the sweep containing this segment.
1375                         sweep_beginning = true;
1376
1377                         // Find the analog data associated with the channel
1378                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1379                         assert(base);
1380
1381                         shared_ptr<data::Analog> data(base->analog_data());
1382                         assert(data);
1383
1384                         // Create a segment, keep it in the maps of channels
1385                         segment = make_shared<data::AnalogSegment>(
1386                                 *data, data->get_segment_count(), cur_samplerate_);
1387                         cur_analog_segments_[channel] = segment;
1388
1389                         // Push the segment into the analog data.
1390                         data->push_segment(segment);
1391
1392                         signal_new_segment();
1393                 }
1394
1395                 assert(segment);
1396
1397                 // Append the samples in the segment
1398                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1399                         channels.size());
1400         }
1401
1402         if (sweep_beginning) {
1403                 // This could be the first packet after a trigger
1404                 set_capture_state(Running);
1405         }
1406
1407         data_received();
1408 }
1409
1410 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1411         shared_ptr<Packet> packet)
1412 {
1413         (void)device;
1414
1415         assert(device);
1416         assert(device == device_->device());
1417         assert(packet);
1418
1419         switch (packet->type()->id()) {
1420         case SR_DF_HEADER:
1421                 feed_in_header();
1422                 break;
1423
1424         case SR_DF_META:
1425                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1426                 break;
1427
1428         case SR_DF_TRIGGER:
1429                 feed_in_trigger();
1430                 break;
1431
1432         case SR_DF_LOGIC:
1433                 try {
1434                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1435                 } catch (bad_alloc&) {
1436                         out_of_memory_ = true;
1437                         device_->stop();
1438                 }
1439                 break;
1440
1441         case SR_DF_ANALOG:
1442                 try {
1443                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1444                 } catch (bad_alloc&) {
1445                         out_of_memory_ = true;
1446                         device_->stop();
1447                 }
1448                 break;
1449
1450         case SR_DF_FRAME_BEGIN:
1451                 feed_in_frame_begin();
1452                 break;
1453
1454         case SR_DF_FRAME_END:
1455                 feed_in_frame_end();
1456                 break;
1457
1458         case SR_DF_END:
1459                 // Strictly speaking, this is performed when a frame end marker was
1460                 // received, so there's no point doing this again. However, not all
1461                 // devices use frames, and for those devices, we need to do it here.
1462                 {
1463                         lock_guard<recursive_mutex> lock(data_mutex_);
1464
1465                         if (cur_logic_segment_)
1466                                 cur_logic_segment_->set_complete();
1467
1468                         for (auto& entry : cur_analog_segments_) {
1469                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1470                                 segment->set_complete();
1471                         }
1472
1473                         cur_logic_segment_.reset();
1474                         cur_analog_segments_.clear();
1475                 }
1476                 break;
1477
1478         default:
1479                 break;
1480         }
1481 }
1482
1483 void Session::on_data_saved()
1484 {
1485         data_saved_ = true;
1486 }
1487
1488 #ifdef ENABLE_DECODE
1489 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1490 {
1491         assert(decoders.size() > 0);
1492
1493         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1494
1495         if (signal)
1496                 for (unsigned int i = 0; i < decoders.size(); i++) {
1497                         const srd_decoder* d = decoders[i];
1498                         signal->stack_decoder(d, !(i < decoders.size() - 1));
1499                 }
1500 }
1501 #endif
1502
1503 } // namespace pv