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 <cassert>
  21 #include <memory>
  22 #include <mutex>
  23 #include <stdexcept>
  24
  25 #include <sys/stat.h>
  26
  27 #include <QDebug>
  28 #include <QFileInfo>
  29
  30 #include "devicemanager.hpp"
  31 #include "mainwindow.hpp"
  32 #include "session.hpp"
  33 #include "util.hpp"
  34
  35 #include "data/analog.hpp"
  36 #include "data/analogsegment.hpp"
  37 #include "data/decode/decoder.hpp"
  38 #include "data/logic.hpp"
  39 #include "data/logicsegment.hpp"
  40 #include "data/signalbase.hpp"
  41
  42 #include "devices/hardwaredevice.hpp"
  43 #include "devices/inputfile.hpp"
  44 #include "devices/sessionfile.hpp"
  45
  46 #include "toolbars/mainbar.hpp"
  47
  48 #include "views/trace/analogsignal.hpp"
  49 #include "views/trace/decodetrace.hpp"
  50 #include "views/trace/logicsignal.hpp"
  51 #include "views/trace/signal.hpp"
  52 #include "views/trace/view.hpp"
  53
  54 #include <libsigrokcxx/libsigrokcxx.hpp>
  55
  56 #ifdef ENABLE_FLOW
  57 #include <gstreamermm.h>
  58 #include <libsigrokflow/libsigrokflow.hpp>
  59 #endif
  60
  61 #ifdef ENABLE_DECODE
  62 #include <libsigrokdecode/libsigrokdecode.h>
  63 #include "data/decodesignal.hpp"
  64 #endif
  65
  66 using std::bad_alloc;
  67 using std::dynamic_pointer_cast;
  68 using std::find_if;
  69 using std::function;
  70 using std::list;
  71 using std::lock_guard;
  72 using std::make_pair;
  73 using std::make_shared;
  74 using std::map;
  75 using std::max;
  76 using std::move;
  77 using std::mutex;
  78 using std::pair;
  79 using std::recursive_mutex;
  80 using std::runtime_error;
  81 using std::shared_ptr;
  82 using std::string;
  83 #ifdef ENABLE_FLOW
  84 using std::unique_lock;
  85 #endif
  86 using std::unique_ptr;
  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::util::Timestamp;
 109 using pv::views::trace::Signal;
 110 using pv::views::trace::AnalogSignal;
 111 using pv::views::trace::LogicSignal;
 112
 113 namespace pv {
 114
 115 shared_ptr<sigrok::Context> Session::sr_context;
 116
 117 Session::Session(DeviceManager &device_manager, QString name) :
 118         shutting_down_(false),
 119         device_manager_(device_manager),
 120         default_name_(name),
 121         name_(name),
 122         capture_state_(Stopped),
 123         cur_samplerate_(0),
 124         data_saved_(true)
 125 {
 126 }
 127
 128 Session::~Session()
 129 {
 130         shutting_down_ = true;
 131
 132         // Stop and join to the thread
 133         stop_capture();
 134 }
 135
 136 DeviceManager& Session::device_manager()
 137 {
 138         return device_manager_;
 139 }
 140
 141 const DeviceManager& Session::device_manager() const
 142 {
 143         return device_manager_;
 144 }
 145
 146 shared_ptr<sigrok::Session> Session::session() const
 147 {
 148         if (!device_)
 149                 return shared_ptr<sigrok::Session>();
 150         return device_->session();
 151 }
 152
 153 shared_ptr<devices::Device> Session::device() const
 154 {
 155         return device_;
 156 }
 157
 158 QString Session::name() const
 159 {
 160         return name_;
 161 }
 162
 163 void Session::set_name(QString name)
 164 {
 165         if (default_name_.isEmpty())
 166                 default_name_ = name;
 167
 168         name_ = name;
 169
 170         name_changed();
 171 }
 172
 173 const vector< shared_ptr<views::ViewBase> > Session::views() const
 174 {
 175         return views_;
 176 }
 177
 178 shared_ptr<views::ViewBase> Session::main_view() const
 179 {
 180         return main_view_;
 181 }
 182
 183 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 184 {
 185         main_bar_ = main_bar;
 186 }
 187
 188 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 189 {
 190         return main_bar_;
 191 }
 192
 193 bool Session::data_saved() const
 194 {
 195         return data_saved_;
 196 }
 197
 198 void Session::save_setup(QSettings &settings) const
 199 {
 200         int i = 0;
 201
 202         // Save channels and decoders
 203         for (const shared_ptr<data::SignalBase>& base : signalbases_) {
 204 #ifdef ENABLE_DECODE
 205                 if (base->is_decode_signal()) {
 206                         settings.beginGroup("decode_signal" + QString::number(i++));
 207                         base->save_settings(settings);
 208                         settings.endGroup();
 209                 } else
 210 #endif
 211                 {
 212                         settings.beginGroup(base->internal_name());
 213                         base->save_settings(settings);
 214                         settings.endGroup();
 215                 }
 216         }
 217
 218         settings.setValue("decode_signals", i);
 219
 220         // Save view states and their signal settings
 221         // Note: main_view must be saved as view0
 222         i = 0;
 223         settings.beginGroup("view" + QString::number(i++));
 224         main_view_->save_settings(settings);
 225         settings.endGroup();
 226
 227         for (const shared_ptr<views::ViewBase>& view : views_) {
 228                 if (view != main_view_) {
 229                         settings.beginGroup("view" + QString::number(i++));
 230                         settings.setValue("type", view->get_type());
 231                         view->save_settings(settings);
 232                         settings.endGroup();
 233                 }
 234         }
 235
 236         settings.setValue("views", i);
 237
 238         int view_id = 0;
 239         i = 0;
 240         for (const shared_ptr<views::ViewBase>& vb : views_) {
 241                 shared_ptr<views::trace::View> tv = dynamic_pointer_cast<views::trace::View>(vb);
 242                 if (tv) {
 243                         for (const shared_ptr<views::trace::TimeItem>& time_item : tv->time_items()) {
 244
 245                                 const shared_ptr<views::trace::Flag> flag =
 246                                         dynamic_pointer_cast<views::trace::Flag>(time_item);
 247                                 if (flag) {
 248                                         if (!flag->enabled())
 249                                                 continue;
 250
 251                                         settings.beginGroup("meta_obj" + QString::number(i++));
 252                                         settings.setValue("type", "time_marker");
 253                                         settings.setValue("assoc_view", view_id);
 254                                         GlobalSettings::store_timestamp(settings, "time", flag->time());
 255                                         settings.setValue("text", flag->get_text());
 256                                         settings.endGroup();
 257                                 }
 258                         }
 259
 260                         if (tv->cursors_shown()) {
 261                                 settings.beginGroup("meta_obj" + QString::number(i++));
 262                                 settings.setValue("type", "selection");
 263                                 settings.setValue("assoc_view", view_id);
 264                                 const shared_ptr<views::trace::CursorPair> cp = tv->cursors();
 265                                 GlobalSettings::store_timestamp(settings, "start_time", cp->first()->time());
 266                                 GlobalSettings::store_timestamp(settings, "end_time", cp->second()->time());
 267                                 settings.endGroup();
 268                         }
 269                 }
 270
 271                 view_id++;
 272         }
 273
 274         settings.setValue("meta_objs", i);
 275 }
 276
 277 void Session::save_settings(QSettings &settings) const
 278 {
 279         map<string, string> dev_info;
 280         list<string> key_list;
 281
 282         if (device_) {
 283                 shared_ptr<devices::HardwareDevice> hw_device =
 284                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 285
 286                 if (hw_device) {
 287                         settings.setValue("device_type", "hardware");
 288                         settings.beginGroup("device");
 289
 290                         key_list.emplace_back("vendor");
 291                         key_list.emplace_back("model");
 292                         key_list.emplace_back("version");
 293                         key_list.emplace_back("serial_num");
 294                         key_list.emplace_back("connection_id");
 295
 296                         dev_info = device_manager_.get_device_info(device_);
 297
 298                         for (string& key : key_list) {
 299                                 if (dev_info.count(key))
 300                                         settings.setValue(QString::fromUtf8(key.c_str()),
 301                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 302                                 else
 303                                         settings.remove(QString::fromUtf8(key.c_str()));
 304                         }
 305
 306                         settings.endGroup();
 307                 }
 308
 309                 shared_ptr<devices::SessionFile> sessionfile_device =
 310                         dynamic_pointer_cast<devices::SessionFile>(device_);
 311
 312                 if (sessionfile_device) {
 313                         settings.setValue("device_type", "sessionfile");
 314                         settings.beginGroup("device");
 315                         settings.setValue("filename", QString::fromStdString(
 316                                 sessionfile_device->full_name()));
 317                         settings.endGroup();
 318                 }
 319
 320                 shared_ptr<devices::InputFile> inputfile_device =
 321                         dynamic_pointer_cast<devices::InputFile>(device_);
 322
 323                 if (inputfile_device) {
 324                         settings.setValue("device_type", "inputfile");
 325                         settings.beginGroup("device");
 326                         inputfile_device->save_meta_to_settings(settings);
 327                         settings.endGroup();
 328                 }
 329
 330                 save_setup(settings);
 331         }
 332 }
 333
 334 void Session::restore_setup(QSettings &settings)
 335 {
 336         // Restore channels
 337         for (shared_ptr<data::SignalBase> base : signalbases_) {
 338                 settings.beginGroup(base->internal_name());
 339                 base->restore_settings(settings);
 340                 settings.endGroup();
 341         }
 342
 343         // Restore decoders
 344 #ifdef ENABLE_DECODE
 345         int decode_signals = settings.value("decode_signals").toInt();
 346
 347         for (int i = 0; i < decode_signals; i++) {
 348                 settings.beginGroup("decode_signal" + QString::number(i));
 349                 shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 350                 signal->restore_settings(settings);
 351                 settings.endGroup();
 352         }
 353 #endif
 354
 355         // Restore views
 356         int views = settings.value("views").toInt();
 357
 358         for (int i = 0; i < views; i++) {
 359                 settings.beginGroup("view" + QString::number(i));
 360
 361                 if (i > 0) {
 362                         views::ViewType type = (views::ViewType)settings.value("type").toInt();
 363                         add_view(type, this);
 364                         views_.back()->restore_settings(settings);
 365                 } else
 366                         main_view_->restore_settings(settings);
 367
 368                 settings.endGroup();
 369         }
 370
 371         // Restore meta objects like markers and cursors
 372         int meta_objs = settings.value("meta_objs").toInt();
 373
 374         for (int i = 0; i < meta_objs; i++) {
 375                 settings.beginGroup("meta_obj" + QString::number(i));
 376
 377                 shared_ptr<views::ViewBase> vb;
 378                 shared_ptr<views::trace::View> tv;
 379                 if (settings.contains("assoc_view"))
 380                         vb = views_.at(settings.value("assoc_view").toInt());
 381
 382                 if (vb)
 383                         tv = dynamic_pointer_cast<views::trace::View>(vb);
 384
 385                 const QString type = settings.value("type").toString();
 386
 387                 if ((type == "time_marker") && tv) {
 388                         Timestamp ts = GlobalSettings::restore_timestamp(settings, "time");
 389                         shared_ptr<views::trace::Flag> flag = tv->add_flag(ts);
 390                         flag->set_text(settings.value("text").toString());
 391                 }
 392
 393                 if ((type == "selection") && tv) {
 394                         Timestamp start = GlobalSettings::restore_timestamp(settings, "start_time");
 395                         Timestamp end = GlobalSettings::restore_timestamp(settings, "end_time");
 396                         tv->set_cursors(start, end);
 397                         tv->show_cursors();
 398                 }
 399
 400                 settings.endGroup();
 401         }
 402 }
 403
 404 void Session::restore_settings(QSettings &settings)
 405 {
 406         shared_ptr<devices::Device> device;
 407
 408         const QString device_type = settings.value("device_type").toString();
 409
 410         if (device_type == "hardware") {
 411                 map<string, string> dev_info;
 412                 list<string> key_list;
 413
 414                 // Re-select last used device if possible but only if it's not demo
 415                 settings.beginGroup("device");
 416                 key_list.emplace_back("vendor");
 417                 key_list.emplace_back("model");
 418                 key_list.emplace_back("version");
 419                 key_list.emplace_back("serial_num");
 420                 key_list.emplace_back("connection_id");
 421
 422                 for (string key : key_list) {
 423                         const QString k = QString::fromStdString(key);
 424                         if (!settings.contains(k))
 425                                 continue;
 426
 427                         const string value = settings.value(k).toString().toStdString();
 428                         if (!value.empty())
 429                                 dev_info.insert(make_pair(key, value));
 430                 }
 431
 432                 if (dev_info.count("model") > 0)
 433                         device = device_manager_.find_device_from_info(dev_info);
 434
 435                 if (device)
 436                         set_device(device);
 437
 438                 settings.endGroup();
 439         }
 440
 441         if ((device_type == "sessionfile") || (device_type == "inputfile")) {
 442                 if (device_type == "sessionfile") {
 443                         settings.beginGroup("device");
 444                         const QString filename = settings.value("filename").toString();
 445                         settings.endGroup();
 446
 447                         if (QFileInfo(filename).isReadable()) {
 448                                 device = make_shared<devices::SessionFile>(device_manager_.context(),
 449                                         filename.toStdString());
 450                         }
 451                 }
 452
 453                 if (device_type == "inputfile") {
 454                         settings.beginGroup("device");
 455                         device = make_shared<devices::InputFile>(device_manager_.context(),
 456                                 settings);
 457                         settings.endGroup();
 458                 }
 459
 460                 if (device) {
 461                         set_device(device);
 462
 463                         start_capture([](QString infoMessage) {
 464                                 // TODO Emulate noquote()
 465                                 qDebug() << "Session error:" << infoMessage; });
 466
 467                         set_name(QString::fromStdString(
 468                                 dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 469                 }
 470         }
 471
 472         if (device)
 473                 restore_setup(settings);
 474 }
 475
 476 void Session::select_device(shared_ptr<devices::Device> device)
 477 {
 478         try {
 479                 if (device)
 480                         set_device(device);
 481                 else
 482                         set_default_device();
 483         } catch (const QString &e) {
 484                 MainWindow::show_session_error(tr("Failed to select device"), e);
 485         }
 486 }
 487
 488 void Session::set_device(shared_ptr<devices::Device> device)
 489 {
 490         assert(device);
 491
 492         // Ensure we are not capturing before setting the device
 493         stop_capture();
 494
 495         if (device_)
 496                 device_->close();
 497
 498         device_.reset();
 499
 500         // Revert name back to default name (e.g. "Session 1") as the data is gone
 501         name_ = default_name_;
 502         name_changed();
 503
 504         // Remove all stored data and reset all views
 505         for (shared_ptr<views::ViewBase> view : views_) {
 506                 view->clear_signalbases();
 507 #ifdef ENABLE_DECODE
 508                 view->clear_decode_signals();
 509 #endif
 510                 view->reset_view_state();
 511         }
 512         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 513                 d->clear();
 514         all_signal_data_.clear();
 515         signalbases_.clear();
 516         cur_logic_segment_.reset();
 517
 518         for (auto& entry : cur_analog_segments_) {
 519                 shared_ptr<sigrok::Channel>(entry.first).reset();
 520                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 521         }
 522
 523         logic_data_.reset();
 524
 525         signals_changed();
 526
 527         device_ = move(device);
 528
 529         try {
 530                 device_->open();
 531         } catch (const QString &e) {
 532                 device_.reset();
 533                 MainWindow::show_session_error(tr("Failed to open device"), e);
 534         }
 535
 536         if (device_) {
 537                 device_->session()->add_datafeed_callback([=]
 538                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 539                                 data_feed_in(device, packet);
 540                         });
 541
 542                 update_signals();
 543         }
 544
 545         device_changed();
 546 }
 547
 548 void Session::set_default_device()
 549 {
 550         const list< shared_ptr<devices::HardwareDevice> > &devices =
 551                 device_manager_.devices();
 552
 553         if (devices.empty())
 554                 return;
 555
 556         // Try and find the demo device and select that by default
 557         const auto iter = find_if(devices.begin(), devices.end(),
 558                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 559                         return d->hardware_device()->driver()->name() == "demo"; });
 560         set_device((iter == devices.end()) ? devices.front() : *iter);
 561 }
 562
 563 bool Session::using_file_device() const
 564 {
 565         shared_ptr<devices::SessionFile> sessionfile_device =
 566                 dynamic_pointer_cast<devices::SessionFile>(device_);
 567
 568         shared_ptr<devices::InputFile> inputfile_device =
 569                 dynamic_pointer_cast<devices::InputFile>(device_);
 570
 571         return (sessionfile_device || inputfile_device);
 572 }
 573
 574 /**
 575  * Convert generic options to data types that are specific to InputFormat.
 576  *
 577  * @param[in] user_spec Vector of tokenized words, string format.
 578  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 579  *
 580  * @return Map of options suitable for InputFormat::create_input().
 581  */
 582 map<string, Glib::VariantBase>
 583 Session::input_format_options(vector<string> user_spec,
 584                 map<string, shared_ptr<Option>> fmt_opts)
 585 {
 586         map<string, Glib::VariantBase> result;
 587
 588         for (auto& entry : user_spec) {
 589                 /*
 590                  * Split key=value specs. Accept entries without separator
 591                  * (for simplified boolean specifications).
 592                  */
 593                 string key, val;
 594                 size_t pos = entry.find("=");
 595                 if (pos == std::string::npos) {
 596                         key = entry;
 597                         val = "";
 598                 } else {
 599                         key = entry.substr(0, pos);
 600                         val = entry.substr(pos + 1);
 601                 }
 602
 603                 /*
 604                  * Skip user specifications that are not a member of the
 605                  * format's set of supported options. Have the text input
 606                  * spec converted to the required input format specific
 607                  * data type.
 608                  */
 609                 auto found = fmt_opts.find(key);
 610                 if (found == fmt_opts.end())
 611                         continue;
 612                 shared_ptr<Option> opt = found->second;
 613                 result[key] = opt->parse_string(val);
 614         }
 615
 616         return result;
 617 }
 618
 619 void Session::load_init_file(const string &file_name,
 620         const string &format, const string &setup_file_name)
 621 {
 622         shared_ptr<InputFormat> input_format;
 623         map<string, Glib::VariantBase> input_opts;
 624
 625         if (!format.empty()) {
 626                 const map<string, shared_ptr<InputFormat> > formats =
 627                         device_manager_.context()->input_formats();
 628                 auto user_opts = pv::util::split_string(format, ":");
 629                 string user_name = user_opts.front();
 630                 user_opts.erase(user_opts.begin());
 631                 const auto iter = find_if(formats.begin(), formats.end(),
 632                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 633                                 return f.first == user_name; });
 634                 if (iter == formats.end()) {
 635                         MainWindow::show_session_error(tr("Error"),
 636                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 637                         return;
 638                 }
 639                 input_format = (*iter).second;
 640                 input_opts = input_format_options(user_opts,
 641                         input_format->options());
 642         }
 643
 644         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 645                 input_format, input_opts);
 646 }
 647
 648 void Session::load_file(QString file_name, QString setup_file_name,
 649         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 650 {
 651         const QString errorMessage(
 652                 QString("Failed to load file %1").arg(file_name));
 653
 654         // In the absence of a caller's format spec, try to auto detect.
 655         // Assume "sigrok session file" upon lookup miss.
 656         if (!format)
 657                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 658         try {
 659                 if (format)
 660                         set_device(shared_ptr<devices::Device>(
 661                                 new devices::InputFile(
 662                                         device_manager_.context(),
 663                                         file_name.toStdString(),
 664                                         format, options)));
 665                 else
 666                         set_device(shared_ptr<devices::Device>(
 667                                 new devices::SessionFile(
 668                                         device_manager_.context(),
 669                                         file_name.toStdString())));
 670         } catch (Error& e) {
 671                 MainWindow::show_session_error(tr("Failed to load %1").arg(file_name), e.what());
 672                 set_default_device();
 673                 main_bar_->update_device_list();
 674                 return;
 675         }
 676
 677         // Use the input file with .pvs extension if no setup file was given
 678         if (setup_file_name.isEmpty()) {
 679                 setup_file_name = file_name;
 680                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 681                 setup_file_name.append(".pvs");
 682         }
 683
 684         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 685                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 686                 restore_setup(settings_storage);
 687         }
 688
 689         main_bar_->update_device_list();
 690
 691         start_capture([&, errorMessage](QString infoMessage) {
 692                 MainWindow::show_session_error(errorMessage, infoMessage); });
 693
 694         set_name(QFileInfo(file_name).fileName());
 695 }
 696
 697 Session::capture_state Session::get_capture_state() const
 698 {
 699         lock_guard<mutex> lock(sampling_mutex_);
 700         return capture_state_;
 701 }
 702
 703 void Session::start_capture(function<void (const QString)> error_handler)
 704 {
 705         if (!device_) {
 706                 error_handler(tr("No active device set, can't start acquisition."));
 707                 return;
 708         }
 709
 710         stop_capture();
 711
 712         // Check that at least one channel is enabled
 713         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 714         if (sr_dev) {
 715                 const auto channels = sr_dev->channels();
 716                 if (!any_of(channels.begin(), channels.end(),
 717                         [](shared_ptr<Channel> channel) {
 718                                 return channel->enabled(); })) {
 719                         error_handler(tr("No channels enabled."));
 720                         return;
 721                 }
 722         }
 723
 724         // Clear signal data
 725         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 726                 d->clear();
 727
 728         trigger_list_.clear();
 729
 730         // Revert name back to default name (e.g. "Session 1") for real devices
 731         // as the (possibly saved) data is gone. File devices keep their name.
 732         shared_ptr<devices::HardwareDevice> hw_device =
 733                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 734
 735         if (hw_device) {
 736                 name_ = default_name_;
 737                 name_changed();
 738         }
 739
 740         // Begin the session
 741         sampling_thread_ = std::thread(
 742                 &Session::sample_thread_proc, this, error_handler);
 743 }
 744
 745 void Session::stop_capture()
 746 {
 747         if (get_capture_state() != Stopped)
 748                 device_->stop();
 749
 750         // Check that sampling stopped
 751         if (sampling_thread_.joinable())
 752                 sampling_thread_.join();
 753 }
 754
 755 void Session::register_view(shared_ptr<views::ViewBase> view)
 756 {
 757         if (views_.empty())
 758                 main_view_ = view;
 759
 760         views_.push_back(view);
 761
 762         // Add all device signals
 763         update_signals();
 764
 765         // Add all other signals
 766         vector< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
 767
 768         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 769                 const int sb_exists = count_if(
 770                         view_signalbases.cbegin(), view_signalbases.cend(),
 771                         [&](const shared_ptr<data::SignalBase> &sb) {
 772                                 return sb == signalbase;
 773                         });
 774
 775                 // Add the signal to the view if it doesn't have it yet
 776                 if (!sb_exists)
 777                         switch (signalbase->type()) {
 778                         case data::SignalBase::AnalogChannel:
 779                         case data::SignalBase::LogicChannel:
 780                         case data::SignalBase::MathChannel:
 781                                 view->add_signalbase(signalbase);
 782                                 break;
 783                         case data::SignalBase::DecodeChannel:
 784 #ifdef ENABLE_DECODE
 785                                 view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 786 #endif
 787                                 break;
 788                         }
 789         }
 790
 791         signals_changed();
 792 }
 793
 794 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 795 {
 796         views_.erase(std::remove_if(views_.begin(), views_.end(),
 797                 [&](shared_ptr<views::ViewBase> v) { return v == view; }),
 798                 views_.end());
 799
 800         if (views_.empty()) {
 801                 main_view_.reset();
 802
 803                 // Without a view there can be no main bar
 804                 main_bar_.reset();
 805         }
 806 }
 807
 808 bool Session::has_view(shared_ptr<views::ViewBase> view)
 809 {
 810         for (shared_ptr<views::ViewBase>& v : views_)
 811                 if (v == view)
 812                         return true;
 813
 814         return false;
 815 }
 816
 817 double Session::get_samplerate() const
 818 {
 819         double samplerate = 0.0;
 820
 821         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 822                 assert(d);
 823                 const vector< shared_ptr<pv::data::Segment> > segments =
 824                         d->segments();
 825                 for (const shared_ptr<pv::data::Segment>& s : segments)
 826                         samplerate = max(samplerate, s->samplerate());
 827         }
 828         // If there is no sample rate given we use samples as unit
 829         if (samplerate == 0.0)
 830                 samplerate = 1.0;
 831
 832         return samplerate;
 833 }
 834
 835 uint32_t Session::get_segment_count() const
 836 {
 837         uint32_t value = 0;
 838
 839         // Find the highest number of segments
 840         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 841                 if (data->get_segment_count() > value)
 842                         value = data->get_segment_count();
 843
 844         return value;
 845 }
 846
 847 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 848 {
 849         vector<util::Timestamp> result;
 850
 851         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 852                 if (entry.first == segment_id)
 853                         result.push_back(entry.second);
 854
 855         return result;
 856 }
 857
 858 const vector< shared_ptr<data::SignalBase> > Session::signalbases() const
 859 {
 860         return signalbases_;
 861 }
 862
 863 void Session::add_generated_signal(shared_ptr<data::SignalBase> signal)
 864 {
 865         signalbases_.push_back(signal);
 866
 867         for (shared_ptr<views::ViewBase>& view : views_)
 868                 view->add_signalbase(signal);
 869
 870         update_signals();
 871 }
 872
 873 void Session::remove_generated_signal(shared_ptr<data::SignalBase> signal)
 874 {
 875         if (shutting_down_)
 876                 return;
 877
 878         signalbases_.erase(std::remove_if(signalbases_.begin(), signalbases_.end(),
 879                 [&](shared_ptr<data::SignalBase> s) { return s == signal; }),
 880                 signalbases_.end());
 881
 882         for (shared_ptr<views::ViewBase>& view : views_)
 883                 view->remove_signalbase(signal);
 884
 885         update_signals();
 886 }
 887
 888 bool Session::all_segments_complete(uint32_t segment_id) const
 889 {
 890         bool all_complete = true;
 891
 892         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 893                 if (!base->segment_is_complete(segment_id))
 894                         all_complete = false;
 895
 896         return all_complete;
 897 }
 898
 899 #ifdef ENABLE_DECODE
 900 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 901 {
 902         shared_ptr<data::DecodeSignal> signal;
 903
 904         try {
 905                 // Create the decode signal
 906                 signal = make_shared<data::DecodeSignal>(*this);
 907
 908                 signalbases_.push_back(signal);
 909
 910                 // Add the decode signal to all views
 911                 for (shared_ptr<views::ViewBase>& view : views_)
 912                         view->add_decode_signal(signal);
 913         } catch (runtime_error& e) {
 914                 remove_decode_signal(signal);
 915                 return nullptr;
 916         }
 917
 918         signals_changed();
 919
 920         return signal;
 921 }
 922
 923 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 924 {
 925         if (shutting_down_)
 926                 return;
 927
 928         signalbases_.erase(std::remove_if(signalbases_.begin(), signalbases_.end(),
 929                 [&](shared_ptr<data::SignalBase> s) { return s == signal; }),
 930                 signalbases_.end());
 931
 932         for (shared_ptr<views::ViewBase>& view : views_)
 933                 view->remove_decode_signal(signal);
 934
 935         signals_changed();
 936 }
 937 #endif
 938
 939 MetadataObjManager* Session::metadata_obj_manager()
 940 {
 941         return &metadata_obj_manager_;
 942 }
 943
 944 void Session::set_capture_state(capture_state state)
 945 {
 946         bool changed;
 947
 948         if (state == Running)
 949                 acq_time_.restart();
 950         if (state == Stopped)
 951                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 952
 953         {
 954                 lock_guard<mutex> lock(sampling_mutex_);
 955                 changed = capture_state_ != state;
 956                 capture_state_ = state;
 957         }
 958
 959         if (changed)
 960                 capture_state_changed(state);
 961 }
 962
 963 void Session::update_signals()
 964 {
 965         if (!device_) {
 966                 signalbases_.clear();
 967                 logic_data_.reset();
 968                 for (shared_ptr<views::ViewBase>& view : views_) {
 969                         view->clear_signalbases();
 970 #ifdef ENABLE_DECODE
 971                         view->clear_decode_signals();
 972 #endif
 973                 }
 974                 return;
 975         }
 976
 977         lock_guard<recursive_mutex> lock(data_mutex_);
 978
 979         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 980         if (!sr_dev) {
 981                 signalbases_.clear();
 982                 logic_data_.reset();
 983                 for (shared_ptr<views::ViewBase>& view : views_) {
 984                         view->clear_signalbases();
 985 #ifdef ENABLE_DECODE
 986                         view->clear_decode_signals();
 987 #endif
 988                 }
 989                 return;
 990         }
 991
 992         // Detect what data types we will receive
 993         auto channels = sr_dev->channels();
 994         unsigned int logic_channel_count = count_if(
 995                 channels.begin(), channels.end(),
 996                 [] (shared_ptr<Channel> channel) {
 997                         return channel->type() == sigrok::ChannelType::LOGIC; });
 998
 999         // Create a common data container for the logic signalbases
1000         {
1001                 lock_guard<recursive_mutex> data_lock(data_mutex_);
1002
1003                 if (logic_channel_count == 0) {
1004                         logic_data_.reset();
1005                 } else if (!logic_data_ ||
1006                         logic_data_->num_channels() != logic_channel_count) {
1007                         logic_data_.reset(new data::Logic(logic_channel_count));
1008                         assert(logic_data_);
1009                 }
1010         }
1011
1012         // Create signalbases if necessary
1013         for (auto channel : sr_dev->channels()) {
1014
1015                 // Try to find the channel in the list of existing signalbases
1016                 const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
1017                         [&](const shared_ptr<SignalBase> &sb) { return sb->channel() == channel; });
1018
1019                 // Not found, let's make a signalbase for it
1020                 if (iter == signalbases_.cend()) {
1021                         shared_ptr<SignalBase> signalbase;
1022                         switch(channel->type()->id()) {
1023                         case SR_CHANNEL_LOGIC:
1024                                 signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::LogicChannel);
1025                                 signalbases_.push_back(signalbase);
1026
1027                                 all_signal_data_.insert(logic_data_);
1028                                 signalbase->set_data(logic_data_);
1029
1030                                 connect(this, SIGNAL(capture_state_changed(int)),
1031                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
1032                                 break;
1033
1034                         case SR_CHANNEL_ANALOG:
1035                                 signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::AnalogChannel);
1036                                 signalbases_.push_back(signalbase);
1037
1038                                 shared_ptr<data::Analog> data(new data::Analog());
1039                                 all_signal_data_.insert(data);
1040                                 signalbase->set_data(data);
1041
1042                                 connect(this, SIGNAL(capture_state_changed(int)),
1043                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
1044                                 break;
1045                         }
1046                 }
1047         }
1048
1049         for (shared_ptr<views::ViewBase>& viewbase : views_) {
1050                 vector< shared_ptr<SignalBase> > view_signalbases =
1051                                 viewbase->signalbases();
1052
1053                 // Add all non-decode signalbases that don't yet exist in the view
1054                 for (shared_ptr<SignalBase>& session_sb : signalbases_) {
1055                         if (session_sb->type() == SignalBase::DecodeChannel)
1056                                 continue;
1057
1058                         const auto iter = find_if(view_signalbases.cbegin(), view_signalbases.cend(),
1059                                 [&](const shared_ptr<SignalBase> &sb) { return sb == session_sb; });
1060
1061                         if (iter == view_signalbases.cend())
1062                                 viewbase->add_signalbase(session_sb);
1063                 }
1064
1065                 // Remove all non-decode signalbases that no longer exist
1066                 for (shared_ptr<SignalBase>& view_sb : view_signalbases) {
1067                         if (view_sb->type() == SignalBase::DecodeChannel)
1068                                 continue;
1069
1070                         const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
1071                                 [&](const shared_ptr<SignalBase> &sb) { return sb == view_sb; });
1072
1073                         if (iter == signalbases_.cend())
1074                                 viewbase->remove_signalbase(view_sb);
1075                 }
1076         }
1077
1078         signals_changed();
1079 }
1080
1081 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
1082         shared_ptr<sigrok::Channel> channel) const
1083 {
1084         for (shared_ptr<data::SignalBase> sig : signalbases_) {
1085                 assert(sig);
1086                 if (sig->channel() == channel)
1087                         return sig;
1088         }
1089         return shared_ptr<data::SignalBase>();
1090 }
1091
1092 void Session::sample_thread_proc(function<void (const QString)> error_handler)
1093 {
1094         assert(error_handler);
1095
1096 #ifdef ENABLE_FLOW
1097         pipeline_ = Pipeline::create();
1098
1099         source_ = ElementFactory::create_element("filesrc", "source");
1100         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
1101
1102         pipeline_->add(source_)->add(sink_);
1103         source_->link(sink_);
1104
1105         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1106
1107         sink_->set_property("emit-signals", TRUE);
1108         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1109
1110         // Get the bus from the pipeline and add a bus watch to the default main context
1111         RefPtr<Bus> bus = pipeline_->get_bus();
1112         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1113
1114         // Start pipeline and Wait until it finished processing
1115         pipeline_done_interrupt_ = false;
1116         pipeline_->set_state(Gst::STATE_PLAYING);
1117
1118         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1119         pipeline_done_cond_.wait(pipeline_done_lock_);
1120
1121         // Let the pipeline free all resources
1122         pipeline_->set_state(Gst::STATE_NULL);
1123
1124 #else
1125         if (!device_)
1126                 return;
1127
1128         try {
1129                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1130         } catch (Error& e) {
1131                 cur_samplerate_ = 0;
1132         }
1133
1134         out_of_memory_ = false;
1135
1136         {
1137                 lock_guard<recursive_mutex> lock(data_mutex_);
1138                 cur_logic_segment_.reset();
1139                 cur_analog_segments_.clear();
1140                 for (shared_ptr<data::SignalBase> sb : signalbases_)
1141                         sb->clear_sample_data();
1142         }
1143         highest_segment_id_ = -1;
1144         frame_began_ = false;
1145
1146         try {
1147                 device_->start();
1148         } catch (Error& e) {
1149                 error_handler(e.what());
1150                 return;
1151         }
1152
1153         set_capture_state(device_->session()->trigger() ?
1154                 AwaitingTrigger : Running);
1155
1156         try {
1157                 device_->run();
1158         } catch (Error& e) {
1159                 error_handler(e.what());
1160                 set_capture_state(Stopped);
1161                 return;
1162         } catch (QString& e) {
1163                 error_handler(e);
1164                 set_capture_state(Stopped);
1165                 return;
1166         }
1167
1168         set_capture_state(Stopped);
1169
1170         // Confirm that SR_DF_END was received
1171         if (cur_logic_segment_)
1172                 qDebug() << "WARNING: SR_DF_END was not received.";
1173 #endif
1174
1175         // Optimize memory usage
1176         free_unused_memory();
1177
1178         // We now have unsaved data unless we just "captured" from a file
1179         shared_ptr<devices::File> file_device =
1180                 dynamic_pointer_cast<devices::File>(device_);
1181
1182         if (!file_device)
1183                 data_saved_ = false;
1184
1185         if (out_of_memory_)
1186                 error_handler(tr("Out of memory, acquisition stopped."));
1187 }
1188
1189 void Session::free_unused_memory()
1190 {
1191         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1192                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1193
1194                 for (const shared_ptr<data::Segment>& segment : segments)
1195                         segment->free_unused_memory();
1196         }
1197 }
1198
1199 void Session::signal_new_segment()
1200 {
1201         int new_segment_id = 0;
1202
1203         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1204
1205                 // Determine new frame/segment number, assuming that all
1206                 // signals have the same number of frames/segments
1207                 if (cur_logic_segment_) {
1208                         new_segment_id = logic_data_->get_segment_count() - 1;
1209                 } else {
1210                         shared_ptr<sigrok::Channel> any_channel =
1211                                 (*cur_analog_segments_.begin()).first;
1212
1213                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1214                         assert(base);
1215
1216                         shared_ptr<data::Analog> data(base->analog_data());
1217                         assert(data);
1218
1219                         new_segment_id = data->get_segment_count() - 1;
1220                 }
1221         }
1222
1223         if (new_segment_id > highest_segment_id_) {
1224                 highest_segment_id_ = new_segment_id;
1225                 new_segment(highest_segment_id_);
1226         }
1227 }
1228
1229 void Session::signal_segment_completed()
1230 {
1231         int segment_id = 0;
1232
1233         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1234                 // We only care about analog and logic channels, not derived ones
1235                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1236                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1237                         break;
1238                 }
1239
1240                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1241                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1242                         break;
1243                 }
1244         }
1245
1246         if (segment_id >= 0)
1247                 segment_completed(segment_id);
1248 }
1249
1250 #ifdef ENABLE_FLOW
1251 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1252 {
1253         (void)bus;
1254
1255         if ((message->get_source() == pipeline_) && \
1256                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1257                 pipeline_done_cond_.notify_one();
1258
1259         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1260
1261         return true;
1262 }
1263
1264 Gst::FlowReturn Session::on_gst_new_sample()
1265 {
1266         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1267         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1268
1269         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1270                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1271                 Gst::MapInfo mapinfo;
1272                 buf_mem->map(mapinfo, Gst::MAP_READ);
1273
1274                 shared_ptr<sigrok::Packet> logic_packet =
1275                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1276
1277                 try {
1278                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1279                 } catch (bad_alloc&) {
1280                         out_of_memory_ = true;
1281                         device_->stop();
1282                         buf_mem->unmap(mapinfo);
1283                         return Gst::FLOW_ERROR;
1284                 }
1285
1286                 buf_mem->unmap(mapinfo);
1287         }
1288
1289         return Gst::FLOW_OK;
1290 }
1291 #endif
1292
1293 void Session::feed_in_header()
1294 {
1295         // Nothing to do here for now
1296 }
1297
1298 void Session::feed_in_meta(shared_ptr<Meta> meta)
1299 {
1300         for (auto& entry : meta->config()) {
1301                 switch (entry.first->id()) {
1302                 case SR_CONF_SAMPLERATE:
1303                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1304                         break;
1305                 default:
1306                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1307                         break;
1308                 }
1309         }
1310
1311         signals_changed();
1312 }
1313
1314 void Session::feed_in_trigger()
1315 {
1316         // The channel containing most samples should be most accurate
1317         uint64_t sample_count = 0;
1318
1319         {
1320                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1321                         assert(d);
1322                         uint64_t temp_count = 0;
1323
1324                         const vector< shared_ptr<pv::data::Segment> > segments =
1325                                 d->segments();
1326                         for (const shared_ptr<pv::data::Segment> &s : segments)
1327                                 temp_count += s->get_sample_count();
1328
1329                         if (temp_count > sample_count)
1330                                 sample_count = temp_count;
1331                 }
1332         }
1333
1334         uint32_t segment_id = 0;  // Default segment when no frames are used
1335
1336         // If a frame began, we'd ideally be able to use the highest segment ID for
1337         // the trigger. However, as new segments are only created when logic or
1338         // analog data comes in, this doesn't work if the trigger appears right
1339         // after the beginning of the frame, before any sample data.
1340         // For this reason, we use highest segment ID + 1 if no sample data came in
1341         // yet and the highest segment ID otherwise.
1342         if (frame_began_) {
1343                 segment_id = highest_segment_id_;
1344                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1345                         segment_id++;
1346         }
1347
1348         // TODO Create timestamp from segment start time + segment's current sample count
1349         util::Timestamp timestamp = sample_count / get_samplerate();
1350         trigger_list_.emplace_back(segment_id, timestamp);
1351         trigger_event(segment_id, timestamp);
1352 }
1353
1354 void Session::feed_in_frame_begin()
1355 {
1356         frame_began_ = true;
1357 }
1358
1359 void Session::feed_in_frame_end()
1360 {
1361         if (!frame_began_)
1362                 return;
1363
1364         {
1365                 lock_guard<recursive_mutex> lock(data_mutex_);
1366
1367                 if (cur_logic_segment_)
1368                         cur_logic_segment_->set_complete();
1369
1370                 for (auto& entry : cur_analog_segments_) {
1371                         shared_ptr<data::AnalogSegment> segment = entry.second;
1372                         segment->set_complete();
1373                 }
1374
1375                 cur_logic_segment_.reset();
1376                 cur_analog_segments_.clear();
1377         }
1378
1379         frame_began_ = false;
1380
1381         signal_segment_completed();
1382 }
1383
1384 void Session::feed_in_logic(shared_ptr<sigrok::Logic> logic)
1385 {
1386         if (logic->data_length() == 0) {
1387                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1388                 return;
1389         }
1390
1391         if (logic->unit_size() > 8)
1392                 throw QString(tr("Can't handle more than 64 logic channels."));
1393
1394         if (!cur_samplerate_)
1395                 try {
1396                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1397                 } catch (Error& e) {
1398                         // Do nothing
1399                 }
1400
1401         lock_guard<recursive_mutex> lock(data_mutex_);
1402
1403         if (!logic_data_) {
1404                 // The only reason logic_data_ would not have been created is
1405                 // if it was not possible to determine the signals when the
1406                 // device was created.
1407                 update_signals();
1408         }
1409
1410         if (!cur_logic_segment_) {
1411                 // This could be the first packet after a trigger
1412                 set_capture_state(Running);
1413
1414                 // Create a new data segment
1415                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1416                         *logic_data_, logic_data_->get_segment_count(),
1417                         logic->unit_size(), cur_samplerate_);
1418                 logic_data_->push_segment(cur_logic_segment_);
1419
1420                 signal_new_segment();
1421         }
1422
1423         cur_logic_segment_->append_payload(logic);
1424
1425         data_received();
1426 }
1427
1428 void Session::feed_in_analog(shared_ptr<sigrok::Analog> analog)
1429 {
1430         if (analog->num_samples() == 0) {
1431                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1432                 return;
1433         }
1434
1435         if (!cur_samplerate_)
1436                 try {
1437                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1438                 } catch (Error& e) {
1439                         // Do nothing
1440                 }
1441
1442         lock_guard<recursive_mutex> lock(data_mutex_);
1443
1444         const vector<shared_ptr<Channel>> channels = analog->channels();
1445         bool sweep_beginning = false;
1446
1447         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1448         analog->get_data_as_float(data.get());
1449
1450         if (signalbases_.empty())
1451                 update_signals();
1452
1453         float *channel_data = data.get();
1454         for (auto& channel : channels) {
1455                 shared_ptr<data::AnalogSegment> segment;
1456
1457                 // Try to get the segment of the channel
1458                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1459                         iterator iter = cur_analog_segments_.find(channel);
1460                 if (iter != cur_analog_segments_.end())
1461                         segment = (*iter).second;
1462                 else {
1463                         // If no segment was found, this means we haven't
1464                         // created one yet. i.e. this is the first packet
1465                         // in the sweep containing this segment.
1466                         sweep_beginning = true;
1467
1468                         // Find the analog data associated with the channel
1469                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1470                         assert(base);
1471
1472                         shared_ptr<data::Analog> data(base->analog_data());
1473                         assert(data);
1474
1475                         // Create a segment, keep it in the maps of channels
1476                         segment = make_shared<data::AnalogSegment>(
1477                                 *data, data->get_segment_count(), cur_samplerate_);
1478                         cur_analog_segments_[channel] = segment;
1479
1480                         // Push the segment into the analog data.
1481                         data->push_segment(segment);
1482
1483                         signal_new_segment();
1484                 }
1485
1486                 assert(segment);
1487
1488                 // Append the samples in the segment
1489                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1490                         channels.size());
1491         }
1492
1493         if (sweep_beginning) {
1494                 // This could be the first packet after a trigger
1495                 set_capture_state(Running);
1496         }
1497
1498         data_received();
1499 }
1500
1501 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1502         shared_ptr<Packet> packet)
1503 {
1504         (void)device;
1505
1506         assert(device);
1507         assert(device == device_->device());
1508         assert(packet);
1509
1510         switch (packet->type()->id()) {
1511         case SR_DF_HEADER:
1512                 feed_in_header();
1513                 break;
1514
1515         case SR_DF_META:
1516                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1517                 break;
1518
1519         case SR_DF_TRIGGER:
1520                 feed_in_trigger();
1521                 break;
1522
1523         case SR_DF_LOGIC:
1524                 try {
1525                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1526                 } catch (bad_alloc&) {
1527                         out_of_memory_ = true;
1528                         device_->stop();
1529                 }
1530                 break;
1531
1532         case SR_DF_ANALOG:
1533                 try {
1534                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1535                 } catch (bad_alloc&) {
1536                         out_of_memory_ = true;
1537                         device_->stop();
1538                 }
1539                 break;
1540
1541         case SR_DF_FRAME_BEGIN:
1542                 feed_in_frame_begin();
1543                 break;
1544
1545         case SR_DF_FRAME_END:
1546                 feed_in_frame_end();
1547                 break;
1548
1549         case SR_DF_END:
1550                 // Strictly speaking, this is performed when a frame end marker was
1551                 // received, so there's no point doing this again. However, not all
1552                 // devices use frames, and for those devices, we need to do it here.
1553                 {
1554                         lock_guard<recursive_mutex> lock(data_mutex_);
1555
1556                         if (cur_logic_segment_)
1557                                 cur_logic_segment_->set_complete();
1558
1559                         for (auto& entry : cur_analog_segments_) {
1560                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1561                                 segment->set_complete();
1562                         }
1563
1564                         cur_logic_segment_.reset();
1565                         cur_analog_segments_.clear();
1566                 }
1567                 break;
1568
1569         default:
1570                 break;
1571         }
1572 }
1573
1574 void Session::on_data_saved()
1575 {
1576         data_saved_ = true;
1577 }
1578
1579 #ifdef ENABLE_DECODE
1580 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1581 {
1582         assert(decoders.size() > 0);
1583
1584         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1585
1586         if (signal)
1587                 for (unsigned int i = 0; i < decoders.size(); i++) {
1588                         const srd_decoder* d = decoders[i];
1589                         signal->stack_decoder(d, !(i < decoders.size() - 1));
1590                 }
1591 }
1592 #endif
1593
1594 } // namespace pv