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 /**
 489  * Convert generic options to data types that are specific to InputFormat.
 490  *
 491  * @param[in] user_spec Vector of tokenized words, string format.
 492  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 493  *
 494  * @return Map of options suitable for InputFormat::create_input().
 495  */
 496 map<string, Glib::VariantBase>
 497 Session::input_format_options(vector<string> user_spec,
 498                 map<string, shared_ptr<Option>> fmt_opts)
 499 {
 500         map<string, Glib::VariantBase> result;
 501
 502         for (auto& entry : user_spec) {
 503                 /*
 504                  * Split key=value specs. Accept entries without separator
 505                  * (for simplified boolean specifications).
 506                  */
 507                 string key, val;
 508                 size_t pos = entry.find("=");
 509                 if (pos == std::string::npos) {
 510                         key = entry;
 511                         val = "";
 512                 } else {
 513                         key = entry.substr(0, pos);
 514                         val = entry.substr(pos + 1);
 515                 }
 516
 517                 /*
 518                  * Skip user specifications that are not a member of the
 519                  * format's set of supported options. Have the text input
 520                  * spec converted to the required input format specific
 521                  * data type.
 522                  */
 523                 auto found = fmt_opts.find(key);
 524                 if (found == fmt_opts.end())
 525                         continue;
 526                 shared_ptr<Option> opt = found->second;
 527                 result[key] = opt->parse_string(val);
 528         }
 529
 530         return result;
 531 }
 532
 533 void Session::load_init_file(const string &file_name,
 534         const string &format, const string &setup_file_name)
 535 {
 536         shared_ptr<InputFormat> input_format;
 537         map<string, Glib::VariantBase> input_opts;
 538
 539         if (!format.empty()) {
 540                 const map<string, shared_ptr<InputFormat> > formats =
 541                         device_manager_.context()->input_formats();
 542                 auto user_opts = pv::util::split_string(format, ":");
 543                 string user_name = user_opts.front();
 544                 user_opts.erase(user_opts.begin());
 545                 const auto iter = find_if(formats.begin(), formats.end(),
 546                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 547                                 return f.first == user_name; });
 548                 if (iter == formats.end()) {
 549                         MainWindow::show_session_error(tr("Error"),
 550                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 551                         return;
 552                 }
 553                 input_format = (*iter).second;
 554                 input_opts = input_format_options(user_opts,
 555                         input_format->options());
 556         }
 557
 558         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 559                 input_format, input_opts);
 560 }
 561
 562 void Session::load_file(QString file_name, QString setup_file_name,
 563         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 564 {
 565         const QString errorMessage(
 566                 QString("Failed to load file %1").arg(file_name));
 567
 568         // In the absence of a caller's format spec, try to auto detect.
 569         // Assume "sigrok session file" upon lookup miss.
 570         if (!format)
 571                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 572         try {
 573                 if (format)
 574                         set_device(shared_ptr<devices::Device>(
 575                                 new devices::InputFile(
 576                                         device_manager_.context(),
 577                                         file_name.toStdString(),
 578                                         format, options)));
 579                 else
 580                         set_device(shared_ptr<devices::Device>(
 581                                 new devices::SessionFile(
 582                                         device_manager_.context(),
 583                                         file_name.toStdString())));
 584         } catch (Error& e) {
 585                 MainWindow::show_session_error(tr("Failed to load ") + file_name, e.what());
 586                 set_default_device();
 587                 main_bar_->update_device_list();
 588                 return;
 589         }
 590
 591         // Use the input file with .pvs extension if no setup file was given
 592         if (setup_file_name.isEmpty()) {
 593                 setup_file_name = file_name;
 594                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 595                 setup_file_name.append(".pvs");
 596         }
 597
 598         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 599                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 600                 restore_setup(settings_storage);
 601         }
 602
 603         main_bar_->update_device_list();
 604
 605         start_capture([&, errorMessage](QString infoMessage) {
 606                 MainWindow::show_session_error(errorMessage, infoMessage); });
 607
 608         set_name(QFileInfo(file_name).fileName());
 609 }
 610
 611 Session::capture_state Session::get_capture_state() const
 612 {
 613         lock_guard<mutex> lock(sampling_mutex_);
 614         return capture_state_;
 615 }
 616
 617 void Session::start_capture(function<void (const QString)> error_handler)
 618 {
 619         if (!device_) {
 620                 error_handler(tr("No active device set, can't start acquisition."));
 621                 return;
 622         }
 623
 624         stop_capture();
 625
 626         // Check that at least one channel is enabled
 627         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 628         if (sr_dev) {
 629                 const auto channels = sr_dev->channels();
 630                 if (!any_of(channels.begin(), channels.end(),
 631                         [](shared_ptr<Channel> channel) {
 632                                 return channel->enabled(); })) {
 633                         error_handler(tr("No channels enabled."));
 634                         return;
 635                 }
 636         }
 637
 638         // Clear signal data
 639         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 640                 d->clear();
 641
 642         trigger_list_.clear();
 643
 644         // Revert name back to default name (e.g. "Session 1") for real devices
 645         // as the (possibly saved) data is gone. File devices keep their name.
 646         shared_ptr<devices::HardwareDevice> hw_device =
 647                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 648
 649         if (hw_device) {
 650                 name_ = default_name_;
 651                 name_changed();
 652         }
 653
 654         // Begin the session
 655         sampling_thread_ = std::thread(
 656                 &Session::sample_thread_proc, this, error_handler);
 657 }
 658
 659 void Session::stop_capture()
 660 {
 661         if (get_capture_state() != Stopped)
 662                 device_->stop();
 663
 664         // Check that sampling stopped
 665         if (sampling_thread_.joinable())
 666                 sampling_thread_.join();
 667 }
 668
 669 void Session::register_view(shared_ptr<views::ViewBase> view)
 670 {
 671         if (views_.empty())
 672                 main_view_ = view;
 673
 674         views_.push_back(view);
 675
 676         // Add all device signals
 677         update_signals();
 678
 679         // Add all other signals
 680         unordered_set< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
 681
 682         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 683                 const int sb_exists = count_if(
 684                         view_signalbases.cbegin(), view_signalbases.cend(),
 685                         [&](const shared_ptr<data::SignalBase> &sb) {
 686                                 return sb == signalbase;
 687                         });
 688
 689                 // Add the signal to the view if it doesn't have it yet
 690                 if (!sb_exists)
 691                         switch (signalbase->type()) {
 692                         case data::SignalBase::AnalogChannel:
 693                         case data::SignalBase::LogicChannel:
 694                         case data::SignalBase::MathChannel:
 695                                 view->add_signalbase(signalbase);
 696                                 break;
 697                         case data::SignalBase::DecodeChannel:
 698 #ifdef ENABLE_DECODE
 699                                 view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 700 #endif
 701                                 break;
 702                         }
 703         }
 704
 705         signals_changed();
 706 }
 707
 708 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 709 {
 710         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 711
 712         if (views_.empty()) {
 713                 main_view_.reset();
 714
 715                 // Without a view there can be no main bar
 716                 main_bar_.reset();
 717         }
 718 }
 719
 720 bool Session::has_view(shared_ptr<views::ViewBase> view)
 721 {
 722         for (shared_ptr<views::ViewBase>& v : views_)
 723                 if (v == view)
 724                         return true;
 725
 726         return false;
 727 }
 728
 729 double Session::get_samplerate() const
 730 {
 731         double samplerate = 0.0;
 732
 733         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 734                 assert(d);
 735                 const vector< shared_ptr<pv::data::Segment> > segments =
 736                         d->segments();
 737                 for (const shared_ptr<pv::data::Segment>& s : segments)
 738                         samplerate = max(samplerate, s->samplerate());
 739         }
 740         // If there is no sample rate given we use samples as unit
 741         if (samplerate == 0.0)
 742                 samplerate = 1.0;
 743
 744         return samplerate;
 745 }
 746
 747 uint32_t Session::get_segment_count() const
 748 {
 749         uint32_t value = 0;
 750
 751         // Find the highest number of segments
 752         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 753                 if (data->get_segment_count() > value)
 754                         value = data->get_segment_count();
 755
 756         return value;
 757 }
 758
 759 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 760 {
 761         vector<util::Timestamp> result;
 762
 763         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 764                 if (entry.first == segment_id)
 765                         result.push_back(entry.second);
 766
 767         return result;
 768 }
 769
 770 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 771 {
 772         return signalbases_;
 773 }
 774
 775 bool Session::all_segments_complete(uint32_t segment_id) const
 776 {
 777         bool all_complete = true;
 778
 779         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 780                 if (!base->segment_is_complete(segment_id))
 781                         all_complete = false;
 782
 783         return all_complete;
 784 }
 785
 786 #ifdef ENABLE_DECODE
 787 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 788 {
 789         shared_ptr<data::DecodeSignal> signal;
 790
 791         try {
 792                 // Create the decode signal
 793                 signal = make_shared<data::DecodeSignal>(*this);
 794
 795                 signalbases_.insert(signal);
 796
 797                 // Add the decode signal to all views
 798                 for (shared_ptr<views::ViewBase>& view : views_)
 799                         view->add_decode_signal(signal);
 800         } catch (runtime_error& e) {
 801                 remove_decode_signal(signal);
 802                 return nullptr;
 803         }
 804
 805         signals_changed();
 806
 807         return signal;
 808 }
 809
 810 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 811 {
 812         signalbases_.erase(signal);
 813
 814         for (shared_ptr<views::ViewBase>& view : views_)
 815                 view->remove_decode_signal(signal);
 816
 817         signals_changed();
 818 }
 819 #endif
 820
 821 void Session::set_capture_state(capture_state state)
 822 {
 823         bool changed;
 824
 825         if (state == Running)
 826                 acq_time_.restart();
 827         if (state == Stopped)
 828                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 829
 830         {
 831                 lock_guard<mutex> lock(sampling_mutex_);
 832                 changed = capture_state_ != state;
 833                 capture_state_ = state;
 834         }
 835
 836         if (changed)
 837                 capture_state_changed(state);
 838 }
 839
 840 void Session::update_signals()
 841 {
 842         if (!device_) {
 843                 signalbases_.clear();
 844                 logic_data_.reset();
 845                 for (shared_ptr<views::ViewBase>& view : views_) {
 846                         view->clear_signals();
 847 #ifdef ENABLE_DECODE
 848                         view->clear_decode_signals();
 849 #endif
 850                 }
 851                 return;
 852         }
 853
 854         lock_guard<recursive_mutex> lock(data_mutex_);
 855
 856         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 857         if (!sr_dev) {
 858                 signalbases_.clear();
 859                 logic_data_.reset();
 860                 for (shared_ptr<views::ViewBase>& view : views_) {
 861                         view->clear_signals();
 862 #ifdef ENABLE_DECODE
 863                         view->clear_decode_signals();
 864 #endif
 865                 }
 866                 return;
 867         }
 868
 869         // Detect what data types we will receive
 870         auto channels = sr_dev->channels();
 871         unsigned int logic_channel_count = count_if(
 872                 channels.begin(), channels.end(),
 873                 [] (shared_ptr<Channel> channel) {
 874                         return channel->type() == sigrok::ChannelType::LOGIC; });
 875
 876         // Create data containers for the logic data segments
 877         {
 878                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 879
 880                 if (logic_channel_count == 0) {
 881                         logic_data_.reset();
 882                 } else if (!logic_data_ ||
 883                         logic_data_->num_channels() != logic_channel_count) {
 884                         logic_data_.reset(new data::Logic(
 885                                 logic_channel_count));
 886                         assert(logic_data_);
 887                 }
 888         }
 889
 890         // Make the signals list
 891         for (shared_ptr<views::ViewBase>& viewbase : views_) {
 892                 views::trace::View *trace_view =
 893                         qobject_cast<views::trace::View*>(viewbase.get());
 894
 895                 if (trace_view) {
 896                         unordered_set< shared_ptr<Signal> > prev_sigs(trace_view->signals());
 897                         trace_view->clear_signals();
 898
 899                         for (auto channel : sr_dev->channels()) {
 900                                 shared_ptr<data::SignalBase> signalbase;
 901                                 shared_ptr<Signal> signal;
 902
 903                                 // Find the channel in the old signals
 904                                 const auto iter = find_if(
 905                                         prev_sigs.cbegin(), prev_sigs.cend(),
 906                                         [&](const shared_ptr<Signal> &s) {
 907                                                 return s->base()->channel() == channel;
 908                                         });
 909                                 if (iter != prev_sigs.end()) {
 910                                         // Copy the signal from the old set to the new
 911                                         signal = *iter;
 912                                         trace_view->add_signal(signal);
 913                                 } else {
 914                                         // Find the signalbase for this channel if possible
 915                                         signalbase.reset();
 916                                         for (const shared_ptr<data::SignalBase>& b : signalbases_)
 917                                                 if (b->channel() == channel)
 918                                                         signalbase = b;
 919
 920                                         shared_ptr<Signal> signal;
 921
 922                                         switch(channel->type()->id()) {
 923                                         case SR_CHANNEL_LOGIC:
 924                                                 if (!signalbase) {
 925                                                         signalbase = make_shared<data::SignalBase>(channel,
 926                                                                 data::SignalBase::LogicChannel);
 927                                                         signalbases_.insert(signalbase);
 928
 929                                                         all_signal_data_.insert(logic_data_);
 930                                                         signalbase->set_data(logic_data_);
 931
 932                                                         connect(this, SIGNAL(capture_state_changed(int)),
 933                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 934                                                 }
 935
 936                                                 signal = shared_ptr<Signal>(new LogicSignal(*this, device_, signalbase));
 937                                                 break;
 938
 939                                         case SR_CHANNEL_ANALOG:
 940                                         {
 941                                                 if (!signalbase) {
 942                                                         signalbase = make_shared<data::SignalBase>(channel,
 943                                                                 data::SignalBase::AnalogChannel);
 944                                                         signalbases_.insert(signalbase);
 945
 946                                                         shared_ptr<data::Analog> data(new data::Analog());
 947                                                         all_signal_data_.insert(data);
 948                                                         signalbase->set_data(data);
 949
 950                                                         connect(this, SIGNAL(capture_state_changed(int)),
 951                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 952                                                 }
 953
 954                                                 signal = shared_ptr<Signal>(new AnalogSignal(*this, signalbase));
 955                                                 break;
 956                                         }
 957
 958                                         default:
 959                                                 assert(false);
 960                                                 break;
 961                                         }
 962
 963                                         // New views take their signal settings from the main view
 964                                         if (!viewbase->is_main_view()) {
 965                                                 shared_ptr<pv::views::trace::View> main_tv =
 966                                                         dynamic_pointer_cast<pv::views::trace::View>(main_view_);
 967                                                 shared_ptr<Signal> main_signal =
 968                                                         main_tv->get_signal_by_signalbase(signalbase);
 969                                                 signal->restore_settings(main_signal->save_settings());
 970                                         }
 971
 972                                         trace_view->add_signal(signal);
 973                                 }
 974                         }
 975                 }
 976         }
 977
 978         signals_changed();
 979 }
 980
 981 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 982         shared_ptr<sigrok::Channel> channel) const
 983 {
 984         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 985                 assert(sig);
 986                 if (sig->channel() == channel)
 987                         return sig;
 988         }
 989         return shared_ptr<data::SignalBase>();
 990 }
 991
 992 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 993 {
 994         assert(error_handler);
 995
 996 #ifdef ENABLE_FLOW
 997         pipeline_ = Pipeline::create();
 998
 999         source_ = ElementFactory::create_element("filesrc", "source");
1000         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
1001
1002         pipeline_->add(source_)->add(sink_);
1003         source_->link(sink_);
1004
1005         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1006
1007         sink_->set_property("emit-signals", TRUE);
1008         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1009
1010         // Get the bus from the pipeline and add a bus watch to the default main context
1011         RefPtr<Bus> bus = pipeline_->get_bus();
1012         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1013
1014         // Start pipeline and Wait until it finished processing
1015         pipeline_done_interrupt_ = false;
1016         pipeline_->set_state(Gst::STATE_PLAYING);
1017
1018         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1019         pipeline_done_cond_.wait(pipeline_done_lock_);
1020
1021         // Let the pipeline free all resources
1022         pipeline_->set_state(Gst::STATE_NULL);
1023
1024 #else
1025         if (!device_)
1026                 return;
1027
1028         try {
1029                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1030         } catch (Error& e) {
1031                 cur_samplerate_ = 0;
1032         }
1033
1034         out_of_memory_ = false;
1035
1036         {
1037                 lock_guard<recursive_mutex> lock(data_mutex_);
1038                 cur_logic_segment_.reset();
1039                 cur_analog_segments_.clear();
1040         }
1041         highest_segment_id_ = -1;
1042         frame_began_ = false;
1043
1044         try {
1045                 device_->start();
1046         } catch (Error& e) {
1047                 error_handler(e.what());
1048                 return;
1049         }
1050
1051         set_capture_state(device_->session()->trigger() ?
1052                 AwaitingTrigger : Running);
1053
1054         try {
1055                 device_->run();
1056         } catch (Error& e) {
1057                 error_handler(e.what());
1058                 set_capture_state(Stopped);
1059                 return;
1060         } catch (QString& e) {
1061                 error_handler(e);
1062                 set_capture_state(Stopped);
1063                 return;
1064         }
1065
1066         set_capture_state(Stopped);
1067
1068         // Confirm that SR_DF_END was received
1069         if (cur_logic_segment_)
1070                 qDebug() << "WARNING: SR_DF_END was not received.";
1071 #endif
1072
1073         // Optimize memory usage
1074         free_unused_memory();
1075
1076         // We now have unsaved data unless we just "captured" from a file
1077         shared_ptr<devices::File> file_device =
1078                 dynamic_pointer_cast<devices::File>(device_);
1079
1080         if (!file_device)
1081                 data_saved_ = false;
1082
1083         if (out_of_memory_)
1084                 error_handler(tr("Out of memory, acquisition stopped."));
1085 }
1086
1087 void Session::free_unused_memory()
1088 {
1089         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1090                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1091
1092                 for (const shared_ptr<data::Segment>& segment : segments)
1093                         segment->free_unused_memory();
1094         }
1095 }
1096
1097 void Session::signal_new_segment()
1098 {
1099         int new_segment_id = 0;
1100
1101         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1102
1103                 // Determine new frame/segment number, assuming that all
1104                 // signals have the same number of frames/segments
1105                 if (cur_logic_segment_) {
1106                         new_segment_id = logic_data_->get_segment_count() - 1;
1107                 } else {
1108                         shared_ptr<sigrok::Channel> any_channel =
1109                                 (*cur_analog_segments_.begin()).first;
1110
1111                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1112                         assert(base);
1113
1114                         shared_ptr<data::Analog> data(base->analog_data());
1115                         assert(data);
1116
1117                         new_segment_id = data->get_segment_count() - 1;
1118                 }
1119         }
1120
1121         if (new_segment_id > highest_segment_id_) {
1122                 highest_segment_id_ = new_segment_id;
1123                 new_segment(highest_segment_id_);
1124         }
1125 }
1126
1127 void Session::signal_segment_completed()
1128 {
1129         int segment_id = 0;
1130
1131         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1132                 // We only care about analog and logic channels, not derived ones
1133                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1134                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1135                         break;
1136                 }
1137
1138                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1139                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1140                         break;
1141                 }
1142         }
1143
1144         if (segment_id >= 0)
1145                 segment_completed(segment_id);
1146 }
1147
1148 #ifdef ENABLE_FLOW
1149 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1150 {
1151         (void)bus;
1152
1153         if ((message->get_source() == pipeline_) && \
1154                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1155                 pipeline_done_cond_.notify_one();
1156
1157         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1158
1159         return true;
1160 }
1161
1162 Gst::FlowReturn Session::on_gst_new_sample()
1163 {
1164         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1165         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1166
1167         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1168                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1169                 Gst::MapInfo mapinfo;
1170                 buf_mem->map(mapinfo, Gst::MAP_READ);
1171
1172                 shared_ptr<sigrok::Packet> logic_packet =
1173                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1174
1175                 try {
1176                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1177                 } catch (bad_alloc&) {
1178                         out_of_memory_ = true;
1179                         device_->stop();
1180                         buf_mem->unmap(mapinfo);
1181                         return Gst::FLOW_ERROR;
1182                 }
1183
1184                 buf_mem->unmap(mapinfo);
1185         }
1186
1187         return Gst::FLOW_OK;
1188 }
1189 #endif
1190
1191 void Session::feed_in_header()
1192 {
1193         // Nothing to do here for now
1194 }
1195
1196 void Session::feed_in_meta(shared_ptr<Meta> meta)
1197 {
1198         for (auto& entry : meta->config()) {
1199                 switch (entry.first->id()) {
1200                 case SR_CONF_SAMPLERATE:
1201                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1202                         break;
1203                 default:
1204                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1205                         break;
1206                 }
1207         }
1208
1209         signals_changed();
1210 }
1211
1212 void Session::feed_in_trigger()
1213 {
1214         // The channel containing most samples should be most accurate
1215         uint64_t sample_count = 0;
1216
1217         {
1218                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1219                         assert(d);
1220                         uint64_t temp_count = 0;
1221
1222                         const vector< shared_ptr<pv::data::Segment> > segments =
1223                                 d->segments();
1224                         for (const shared_ptr<pv::data::Segment> &s : segments)
1225                                 temp_count += s->get_sample_count();
1226
1227                         if (temp_count > sample_count)
1228                                 sample_count = temp_count;
1229                 }
1230         }
1231
1232         uint32_t segment_id = 0;  // Default segment when no frames are used
1233
1234         // If a frame began, we'd ideally be able to use the highest segment ID for
1235         // the trigger. However, as new segments are only created when logic or
1236         // analog data comes in, this doesn't work if the trigger appears right
1237         // after the beginning of the frame, before any sample data.
1238         // For this reason, we use highest segment ID + 1 if no sample data came in
1239         // yet and the highest segment ID otherwise.
1240         if (frame_began_) {
1241                 segment_id = highest_segment_id_;
1242                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1243                         segment_id++;
1244         }
1245
1246         // TODO Create timestamp from segment start time + segment's current sample count
1247         util::Timestamp timestamp = sample_count / get_samplerate();
1248         trigger_list_.emplace_back(segment_id, timestamp);
1249         trigger_event(segment_id, timestamp);
1250 }
1251
1252 void Session::feed_in_frame_begin()
1253 {
1254         frame_began_ = true;
1255 }
1256
1257 void Session::feed_in_frame_end()
1258 {
1259         if (!frame_began_)
1260                 return;
1261
1262         {
1263                 lock_guard<recursive_mutex> lock(data_mutex_);
1264
1265                 if (cur_logic_segment_)
1266                         cur_logic_segment_->set_complete();
1267
1268                 for (auto& entry : cur_analog_segments_) {
1269                         shared_ptr<data::AnalogSegment> segment = entry.second;
1270                         segment->set_complete();
1271                 }
1272
1273                 cur_logic_segment_.reset();
1274                 cur_analog_segments_.clear();
1275         }
1276
1277         frame_began_ = false;
1278
1279         signal_segment_completed();
1280 }
1281
1282 void Session::feed_in_logic(shared_ptr<Logic> logic)
1283 {
1284         if (logic->data_length() == 0) {
1285                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1286                 return;
1287         }
1288
1289         if (logic->unit_size() > 8)
1290                 throw QString(tr("Can't handle more than 64 logic channels."));
1291
1292         if (!cur_samplerate_)
1293                 try {
1294                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1295                 } catch (Error& e) {
1296                         // Do nothing
1297                 }
1298
1299         lock_guard<recursive_mutex> lock(data_mutex_);
1300
1301         if (!logic_data_) {
1302                 // The only reason logic_data_ would not have been created is
1303                 // if it was not possible to determine the signals when the
1304                 // device was created.
1305                 update_signals();
1306         }
1307
1308         if (!cur_logic_segment_) {
1309                 // This could be the first packet after a trigger
1310                 set_capture_state(Running);
1311
1312                 // Create a new data segment
1313                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1314                         *logic_data_, logic_data_->get_segment_count(),
1315                         logic->unit_size(), cur_samplerate_);
1316                 logic_data_->push_segment(cur_logic_segment_);
1317
1318                 signal_new_segment();
1319         }
1320
1321         cur_logic_segment_->append_payload(logic);
1322
1323         data_received();
1324 }
1325
1326 void Session::feed_in_analog(shared_ptr<Analog> analog)
1327 {
1328         if (analog->num_samples() == 0) {
1329                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1330                 return;
1331         }
1332
1333         if (!cur_samplerate_)
1334                 try {
1335                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1336                 } catch (Error& e) {
1337                         // Do nothing
1338                 }
1339
1340         lock_guard<recursive_mutex> lock(data_mutex_);
1341
1342         const vector<shared_ptr<Channel>> channels = analog->channels();
1343         bool sweep_beginning = false;
1344
1345         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1346         analog->get_data_as_float(data.get());
1347
1348         if (signalbases_.empty())
1349                 update_signals();
1350
1351         float *channel_data = data.get();
1352         for (auto& channel : channels) {
1353                 shared_ptr<data::AnalogSegment> segment;
1354
1355                 // Try to get the segment of the channel
1356                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1357                         iterator iter = cur_analog_segments_.find(channel);
1358                 if (iter != cur_analog_segments_.end())
1359                         segment = (*iter).second;
1360                 else {
1361                         // If no segment was found, this means we haven't
1362                         // created one yet. i.e. this is the first packet
1363                         // in the sweep containing this segment.
1364                         sweep_beginning = true;
1365
1366                         // Find the analog data associated with the channel
1367                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1368                         assert(base);
1369
1370                         shared_ptr<data::Analog> data(base->analog_data());
1371                         assert(data);
1372
1373                         // Create a segment, keep it in the maps of channels
1374                         segment = make_shared<data::AnalogSegment>(
1375                                 *data, data->get_segment_count(), cur_samplerate_);
1376                         cur_analog_segments_[channel] = segment;
1377
1378                         // Push the segment into the analog data.
1379                         data->push_segment(segment);
1380
1381                         signal_new_segment();
1382                 }
1383
1384                 assert(segment);
1385
1386                 // Append the samples in the segment
1387                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1388                         channels.size());
1389         }
1390
1391         if (sweep_beginning) {
1392                 // This could be the first packet after a trigger
1393                 set_capture_state(Running);
1394         }
1395
1396         data_received();
1397 }
1398
1399 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1400         shared_ptr<Packet> packet)
1401 {
1402         (void)device;
1403
1404         assert(device);
1405         assert(device == device_->device());
1406         assert(packet);
1407
1408         switch (packet->type()->id()) {
1409         case SR_DF_HEADER:
1410                 feed_in_header();
1411                 break;
1412
1413         case SR_DF_META:
1414                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1415                 break;
1416
1417         case SR_DF_TRIGGER:
1418                 feed_in_trigger();
1419                 break;
1420
1421         case SR_DF_LOGIC:
1422                 try {
1423                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1424                 } catch (bad_alloc&) {
1425                         out_of_memory_ = true;
1426                         device_->stop();
1427                 }
1428                 break;
1429
1430         case SR_DF_ANALOG:
1431                 try {
1432                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1433                 } catch (bad_alloc&) {
1434                         out_of_memory_ = true;
1435                         device_->stop();
1436                 }
1437                 break;
1438
1439         case SR_DF_FRAME_BEGIN:
1440                 feed_in_frame_begin();
1441                 break;
1442
1443         case SR_DF_FRAME_END:
1444                 feed_in_frame_end();
1445                 break;
1446
1447         case SR_DF_END:
1448                 // Strictly speaking, this is performed when a frame end marker was
1449                 // received, so there's no point doing this again. However, not all
1450                 // devices use frames, and for those devices, we need to do it here.
1451                 {
1452                         lock_guard<recursive_mutex> lock(data_mutex_);
1453
1454                         if (cur_logic_segment_)
1455                                 cur_logic_segment_->set_complete();
1456
1457                         for (auto& entry : cur_analog_segments_) {
1458                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1459                                 segment->set_complete();
1460                         }
1461
1462                         cur_logic_segment_.reset();
1463                         cur_analog_segments_.clear();
1464                 }
1465                 break;
1466
1467         default:
1468                 break;
1469         }
1470 }
1471
1472 void Session::on_data_saved()
1473 {
1474         data_saved_ = true;
1475 }
1476
1477 #ifdef ENABLE_DECODE
1478 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1479 {
1480         assert(decoders.size() > 0);
1481
1482         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1483
1484         if (signal)
1485                 for (unsigned int i = 0; i < decoders.size(); i++) {
1486                         const srd_decoder* d = decoders[i];
1487                         signal->stack_decoder(d, !(i < decoders.size() - 1));
1488                 }
1489 }
1490 #endif
1491
1492 } // namespace pv