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::unordered_set;
  88 using std::vector;
  89
  90 using sigrok::Analog;
  91 using sigrok::Channel;
  92 using sigrok::ConfigKey;
  93 using sigrok::DatafeedCallbackFunction;
  94 using sigrok::Error;
  95 using sigrok::InputFormat;
  96 using sigrok::Logic;
  97 using sigrok::Meta;
  98 using sigrok::Packet;
  99 using sigrok::Session;
 100
 101 using Glib::VariantBase;
 102
 103 #ifdef ENABLE_FLOW
 104 using Gst::Bus;
 105 using Gst::ElementFactory;
 106 using Gst::Pipeline;
 107 #endif
 108
 109 using pv::util::Timestamp;
 110 using pv::views::trace::Signal;
 111 using pv::views::trace::AnalogSignal;
 112 using pv::views::trace::LogicSignal;
 113
 114 namespace pv {
 115
 116 shared_ptr<sigrok::Context> Session::sr_context;
 117
 118 Session::Session(DeviceManager &device_manager, QString name) :
 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         // Stop and join to the thread
 131         stop_capture();
 132 }
 133
 134 DeviceManager& Session::device_manager()
 135 {
 136         return device_manager_;
 137 }
 138
 139 const DeviceManager& Session::device_manager() const
 140 {
 141         return device_manager_;
 142 }
 143
 144 shared_ptr<sigrok::Session> Session::session() const
 145 {
 146         if (!device_)
 147                 return shared_ptr<sigrok::Session>();
 148         return device_->session();
 149 }
 150
 151 shared_ptr<devices::Device> Session::device() const
 152 {
 153         return device_;
 154 }
 155
 156 QString Session::name() const
 157 {
 158         return name_;
 159 }
 160
 161 void Session::set_name(QString name)
 162 {
 163         if (default_name_.isEmpty())
 164                 default_name_ = name;
 165
 166         name_ = name;
 167
 168         name_changed();
 169 }
 170
 171 const vector< shared_ptr<views::ViewBase> > Session::views() const
 172 {
 173         return views_;
 174 }
 175
 176 shared_ptr<views::ViewBase> Session::main_view() const
 177 {
 178         return main_view_;
 179 }
 180
 181 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 182 {
 183         main_bar_ = main_bar;
 184 }
 185
 186 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 187 {
 188         return main_bar_;
 189 }
 190
 191 bool Session::data_saved() const
 192 {
 193         return data_saved_;
 194 }
 195
 196 void Session::save_setup(QSettings &settings) const
 197 {
 198         int i = 0;
 199
 200         // Save channels and decoders
 201         for (const shared_ptr<data::SignalBase>& base : signalbases_) {
 202 #ifdef ENABLE_DECODE
 203                 if (base->is_decode_signal()) {
 204                         settings.beginGroup("decode_signal" + QString::number(i++));
 205                         base->save_settings(settings);
 206                         settings.endGroup();
 207                 } else
 208 #endif
 209                 {
 210                         settings.beginGroup(base->internal_name());
 211                         base->save_settings(settings);
 212                         settings.endGroup();
 213                 }
 214         }
 215
 216         settings.setValue("decode_signals", i);
 217
 218         // Save view states and their signal settings
 219         // Note: main_view must be saved as view0
 220         i = 0;
 221         settings.beginGroup("view" + QString::number(i++));
 222         main_view_->save_settings(settings);
 223         settings.endGroup();
 224
 225         for (const shared_ptr<views::ViewBase>& view : views_) {
 226                 if (view != main_view_) {
 227                         settings.beginGroup("view" + QString::number(i++));
 228                         settings.setValue("type", view->get_type());
 229                         view->save_settings(settings);
 230                         settings.endGroup();
 231                 }
 232         }
 233
 234         settings.setValue("views", i);
 235
 236         int view_id = 0;
 237         i = 0;
 238         for (const shared_ptr<views::ViewBase> vb : views_) {
 239                 shared_ptr<views::trace::View> tv = dynamic_pointer_cast<views::trace::View>(vb);
 240                 if (tv) {
 241                         for (const shared_ptr<views::trace::TimeItem>& time_item : tv->time_items()) {
 242
 243                                 const shared_ptr<views::trace::Flag> flag =
 244                                         dynamic_pointer_cast<views::trace::Flag>(time_item);
 245                                 if (flag) {
 246                                         if (!flag->enabled())
 247                                                 continue;
 248
 249                                         settings.beginGroup("meta_obj" + QString::number(i++));
 250                                         settings.setValue("type", "time_marker");
 251                                         settings.setValue("assoc_view", view_id);
 252                                         GlobalSettings::store_timestamp(settings, "time", flag->time());
 253                                         settings.setValue("text", flag->get_text());
 254                                         settings.endGroup();
 255                                 }
 256                         }
 257
 258                         if (tv->cursors_shown()) {
 259                                 settings.beginGroup("meta_obj" + QString::number(i++));
 260                                 settings.setValue("type", "selection");
 261                                 settings.setValue("assoc_view", view_id);
 262                                 const shared_ptr<views::trace::CursorPair> cp = tv->cursors();
 263                                 GlobalSettings::store_timestamp(settings, "start_time", cp->first()->time());
 264                                 GlobalSettings::store_timestamp(settings, "end_time", cp->second()->time());
 265                                 settings.endGroup();
 266                         }
 267                 }
 268
 269                 view_id++;
 270         }
 271
 272         settings.setValue("meta_objs", i);
 273 }
 274
 275 void Session::save_settings(QSettings &settings) const
 276 {
 277         map<string, string> dev_info;
 278         list<string> key_list;
 279
 280         if (device_) {
 281                 shared_ptr<devices::HardwareDevice> hw_device =
 282                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 283
 284                 if (hw_device) {
 285                         settings.setValue("device_type", "hardware");
 286                         settings.beginGroup("device");
 287
 288                         key_list.emplace_back("vendor");
 289                         key_list.emplace_back("model");
 290                         key_list.emplace_back("version");
 291                         key_list.emplace_back("serial_num");
 292                         key_list.emplace_back("connection_id");
 293
 294                         dev_info = device_manager_.get_device_info(device_);
 295
 296                         for (string& key : key_list) {
 297                                 if (dev_info.count(key))
 298                                         settings.setValue(QString::fromUtf8(key.c_str()),
 299                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 300                                 else
 301                                         settings.remove(QString::fromUtf8(key.c_str()));
 302                         }
 303
 304                         settings.endGroup();
 305                 }
 306
 307                 shared_ptr<devices::SessionFile> sessionfile_device =
 308                         dynamic_pointer_cast<devices::SessionFile>(device_);
 309
 310                 if (sessionfile_device) {
 311                         settings.setValue("device_type", "sessionfile");
 312                         settings.beginGroup("device");
 313                         settings.setValue("filename", QString::fromStdString(
 314                                 sessionfile_device->full_name()));
 315                         settings.endGroup();
 316                 }
 317
 318                 shared_ptr<devices::InputFile> inputfile_device =
 319                         dynamic_pointer_cast<devices::InputFile>(device_);
 320
 321                 if (inputfile_device) {
 322                         settings.setValue("device_type", "inputfile");
 323                         settings.beginGroup("device");
 324                         inputfile_device->save_meta_to_settings(settings);
 325                         settings.endGroup();
 326                 }
 327
 328                 save_setup(settings);
 329         }
 330 }
 331
 332 void Session::restore_setup(QSettings &settings)
 333 {
 334         // Restore channels
 335         for (shared_ptr<data::SignalBase> base : signalbases_) {
 336                 settings.beginGroup(base->internal_name());
 337                 base->restore_settings(settings);
 338                 settings.endGroup();
 339         }
 340
 341         // Restore decoders
 342 #ifdef ENABLE_DECODE
 343         int decode_signals = settings.value("decode_signals").toInt();
 344
 345         for (int i = 0; i < decode_signals; i++) {
 346                 settings.beginGroup("decode_signal" + QString::number(i));
 347                 shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 348                 signal->restore_settings(settings);
 349                 settings.endGroup();
 350         }
 351 #endif
 352
 353         // Restore views
 354         int views = settings.value("views").toInt();
 355
 356         for (int i = 0; i < views; i++) {
 357                 settings.beginGroup("view" + QString::number(i));
 358
 359                 if (i > 0) {
 360                         views::ViewType type = (views::ViewType)settings.value("type").toInt();
 361                         add_view(type, this);
 362                         views_.back()->restore_settings(settings);
 363                 } else
 364                         main_view_->restore_settings(settings);
 365
 366                 settings.endGroup();
 367         }
 368
 369         // Restore meta objects like markers and cursors
 370         int meta_objs = settings.value("meta_objs").toInt();
 371
 372         for (int i = 0; i < meta_objs; i++) {
 373                 settings.beginGroup("meta_obj" + QString::number(i));
 374
 375                 shared_ptr<views::ViewBase> vb;
 376                 shared_ptr<views::trace::View> tv;
 377                 if (settings.contains("assoc_view"))
 378                         vb = views_.at(settings.value("assoc_view").toInt());
 379
 380                 if (vb)
 381                         tv = dynamic_pointer_cast<views::trace::View>(vb);
 382
 383                 const QString type = settings.value("type").toString();
 384
 385                 if ((type == "time_marker") && tv) {
 386                         Timestamp ts = GlobalSettings::restore_timestamp(settings, "time");
 387                         shared_ptr<views::trace::Flag> flag = tv->add_flag(ts);
 388                         flag->set_text(settings.value("text").toString());
 389                 }
 390
 391                 if ((type == "selection") && tv) {
 392                         Timestamp start = GlobalSettings::restore_timestamp(settings, "start_time");
 393                         Timestamp end = GlobalSettings::restore_timestamp(settings, "end_time");
 394                         tv->set_cursors(start, end);
 395                         tv->show_cursors();
 396                 }
 397
 398                 settings.endGroup();
 399         }
 400 }
 401
 402 void Session::restore_settings(QSettings &settings)
 403 {
 404         shared_ptr<devices::Device> device;
 405
 406         const QString device_type = settings.value("device_type").toString();
 407
 408         if (device_type == "hardware") {
 409                 map<string, string> dev_info;
 410                 list<string> key_list;
 411
 412                 // Re-select last used device if possible but only if it's not demo
 413                 settings.beginGroup("device");
 414                 key_list.emplace_back("vendor");
 415                 key_list.emplace_back("model");
 416                 key_list.emplace_back("version");
 417                 key_list.emplace_back("serial_num");
 418                 key_list.emplace_back("connection_id");
 419
 420                 for (string key : key_list) {
 421                         const QString k = QString::fromStdString(key);
 422                         if (!settings.contains(k))
 423                                 continue;
 424
 425                         const string value = settings.value(k).toString().toStdString();
 426                         if (!value.empty())
 427                                 dev_info.insert(make_pair(key, value));
 428                 }
 429
 430                 if (dev_info.count("model") > 0)
 431                         device = device_manager_.find_device_from_info(dev_info);
 432
 433                 if (device)
 434                         set_device(device);
 435
 436                 settings.endGroup();
 437         }
 438
 439         if ((device_type == "sessionfile") || (device_type == "inputfile")) {
 440                 if (device_type == "sessionfile") {
 441                         settings.beginGroup("device");
 442                         const QString filename = settings.value("filename").toString();
 443                         settings.endGroup();
 444
 445                         if (QFileInfo(filename).isReadable()) {
 446                                 device = make_shared<devices::SessionFile>(device_manager_.context(),
 447                                         filename.toStdString());
 448                         }
 449                 }
 450
 451                 if (device_type == "inputfile") {
 452                         settings.beginGroup("device");
 453                         device = make_shared<devices::InputFile>(device_manager_.context(),
 454                                 settings);
 455                         settings.endGroup();
 456                 }
 457
 458                 if (device) {
 459                         set_device(device);
 460
 461                         start_capture([](QString infoMessage) {
 462                                 // TODO Emulate noquote()
 463                                 qDebug() << "Session error:" << infoMessage; });
 464
 465                         set_name(QString::fromStdString(
 466                                 dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 467                 }
 468         }
 469
 470         if (device)
 471                 restore_setup(settings);
 472 }
 473
 474 void Session::select_device(shared_ptr<devices::Device> device)
 475 {
 476         try {
 477                 if (device)
 478                         set_device(device);
 479                 else
 480                         set_default_device();
 481         } catch (const QString &e) {
 482                 MainWindow::show_session_error(tr("Failed to select device"), e);
 483         }
 484 }
 485
 486 void Session::set_device(shared_ptr<devices::Device> device)
 487 {
 488         assert(device);
 489
 490         // Ensure we are not capturing before setting the device
 491         stop_capture();
 492
 493         if (device_)
 494                 device_->close();
 495
 496         device_.reset();
 497
 498         // Revert name back to default name (e.g. "Session 1") as the data is gone
 499         name_ = default_name_;
 500         name_changed();
 501
 502         // Remove all stored data and reset all views
 503         for (shared_ptr<views::ViewBase> view : views_) {
 504                 view->clear_signals();
 505 #ifdef ENABLE_DECODE
 506                 view->clear_decode_signals();
 507 #endif
 508                 view->reset_view_state();
 509         }
 510         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 511                 d->clear();
 512         all_signal_data_.clear();
 513         signalbases_.clear();
 514         cur_logic_segment_.reset();
 515
 516         for (auto& entry : cur_analog_segments_) {
 517                 shared_ptr<sigrok::Channel>(entry.first).reset();
 518                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 519         }
 520
 521         logic_data_.reset();
 522
 523         signals_changed();
 524
 525         device_ = move(device);
 526
 527         try {
 528                 device_->open();
 529         } catch (const QString &e) {
 530                 device_.reset();
 531                 MainWindow::show_session_error(tr("Failed to open device"), e);
 532         }
 533
 534         if (device_) {
 535                 device_->session()->add_datafeed_callback([=]
 536                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 537                                 data_feed_in(device, packet);
 538                         });
 539
 540                 update_signals();
 541         }
 542
 543         device_changed();
 544 }
 545
 546 void Session::set_default_device()
 547 {
 548         const list< shared_ptr<devices::HardwareDevice> > &devices =
 549                 device_manager_.devices();
 550
 551         if (devices.empty())
 552                 return;
 553
 554         // Try and find the demo device and select that by default
 555         const auto iter = find_if(devices.begin(), devices.end(),
 556                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 557                         return d->hardware_device()->driver()->name() == "demo"; });
 558         set_device((iter == devices.end()) ? devices.front() : *iter);
 559 }
 560
 561 bool Session::using_file_device() const
 562 {
 563         shared_ptr<devices::SessionFile> sessionfile_device =
 564                 dynamic_pointer_cast<devices::SessionFile>(device_);
 565
 566         shared_ptr<devices::InputFile> inputfile_device =
 567                 dynamic_pointer_cast<devices::InputFile>(device_);
 568
 569         return (sessionfile_device || inputfile_device);
 570 }
 571
 572 /**
 573  * Convert generic options to data types that are specific to InputFormat.
 574  *
 575  * @param[in] user_spec Vector of tokenized words, string format.
 576  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 577  *
 578  * @return Map of options suitable for InputFormat::create_input().
 579  */
 580 map<string, Glib::VariantBase>
 581 Session::input_format_options(vector<string> user_spec,
 582                 map<string, shared_ptr<Option>> fmt_opts)
 583 {
 584         map<string, Glib::VariantBase> result;
 585
 586         for (auto& entry : user_spec) {
 587                 /*
 588                  * Split key=value specs. Accept entries without separator
 589                  * (for simplified boolean specifications).
 590                  */
 591                 string key, val;
 592                 size_t pos = entry.find("=");
 593                 if (pos == std::string::npos) {
 594                         key = entry;
 595                         val = "";
 596                 } else {
 597                         key = entry.substr(0, pos);
 598                         val = entry.substr(pos + 1);
 599                 }
 600
 601                 /*
 602                  * Skip user specifications that are not a member of the
 603                  * format's set of supported options. Have the text input
 604                  * spec converted to the required input format specific
 605                  * data type.
 606                  */
 607                 auto found = fmt_opts.find(key);
 608                 if (found == fmt_opts.end())
 609                         continue;
 610                 shared_ptr<Option> opt = found->second;
 611                 result[key] = opt->parse_string(val);
 612         }
 613
 614         return result;
 615 }
 616
 617 void Session::load_init_file(const string &file_name,
 618         const string &format, const string &setup_file_name)
 619 {
 620         shared_ptr<InputFormat> input_format;
 621         map<string, Glib::VariantBase> input_opts;
 622
 623         if (!format.empty()) {
 624                 const map<string, shared_ptr<InputFormat> > formats =
 625                         device_manager_.context()->input_formats();
 626                 auto user_opts = pv::util::split_string(format, ":");
 627                 string user_name = user_opts.front();
 628                 user_opts.erase(user_opts.begin());
 629                 const auto iter = find_if(formats.begin(), formats.end(),
 630                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 631                                 return f.first == user_name; });
 632                 if (iter == formats.end()) {
 633                         MainWindow::show_session_error(tr("Error"),
 634                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 635                         return;
 636                 }
 637                 input_format = (*iter).second;
 638                 input_opts = input_format_options(user_opts,
 639                         input_format->options());
 640         }
 641
 642         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 643                 input_format, input_opts);
 644 }
 645
 646 void Session::load_file(QString file_name, QString setup_file_name,
 647         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 648 {
 649         const QString errorMessage(
 650                 QString("Failed to load file %1").arg(file_name));
 651
 652         // In the absence of a caller's format spec, try to auto detect.
 653         // Assume "sigrok session file" upon lookup miss.
 654         if (!format)
 655                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 656         try {
 657                 if (format)
 658                         set_device(shared_ptr<devices::Device>(
 659                                 new devices::InputFile(
 660                                         device_manager_.context(),
 661                                         file_name.toStdString(),
 662                                         format, options)));
 663                 else
 664                         set_device(shared_ptr<devices::Device>(
 665                                 new devices::SessionFile(
 666                                         device_manager_.context(),
 667                                         file_name.toStdString())));
 668         } catch (Error& e) {
 669                 MainWindow::show_session_error(tr("Failed to load %1").arg(file_name), e.what());
 670                 set_default_device();
 671                 main_bar_->update_device_list();
 672                 return;
 673         }
 674
 675         // Use the input file with .pvs extension if no setup file was given
 676         if (setup_file_name.isEmpty()) {
 677                 setup_file_name = file_name;
 678                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 679                 setup_file_name.append(".pvs");
 680         }
 681
 682         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 683                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 684                 restore_setup(settings_storage);
 685         }
 686
 687         main_bar_->update_device_list();
 688
 689         start_capture([&, errorMessage](QString infoMessage) {
 690                 MainWindow::show_session_error(errorMessage, infoMessage); });
 691
 692         set_name(QFileInfo(file_name).fileName());
 693 }
 694
 695 Session::capture_state Session::get_capture_state() const
 696 {
 697         lock_guard<mutex> lock(sampling_mutex_);
 698         return capture_state_;
 699 }
 700
 701 void Session::start_capture(function<void (const QString)> error_handler)
 702 {
 703         if (!device_) {
 704                 error_handler(tr("No active device set, can't start acquisition."));
 705                 return;
 706         }
 707
 708         stop_capture();
 709
 710         // Check that at least one channel is enabled
 711         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 712         if (sr_dev) {
 713                 const auto channels = sr_dev->channels();
 714                 if (!any_of(channels.begin(), channels.end(),
 715                         [](shared_ptr<Channel> channel) {
 716                                 return channel->enabled(); })) {
 717                         error_handler(tr("No channels enabled."));
 718                         return;
 719                 }
 720         }
 721
 722         // Clear signal data
 723         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 724                 d->clear();
 725
 726         trigger_list_.clear();
 727
 728         // Revert name back to default name (e.g. "Session 1") for real devices
 729         // as the (possibly saved) data is gone. File devices keep their name.
 730         shared_ptr<devices::HardwareDevice> hw_device =
 731                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 732
 733         if (hw_device) {
 734                 name_ = default_name_;
 735                 name_changed();
 736         }
 737
 738         // Begin the session
 739         sampling_thread_ = std::thread(
 740                 &Session::sample_thread_proc, this, error_handler);
 741 }
 742
 743 void Session::stop_capture()
 744 {
 745         if (get_capture_state() != Stopped)
 746                 device_->stop();
 747
 748         // Check that sampling stopped
 749         if (sampling_thread_.joinable())
 750                 sampling_thread_.join();
 751 }
 752
 753 void Session::register_view(shared_ptr<views::ViewBase> view)
 754 {
 755         if (views_.empty())
 756                 main_view_ = view;
 757
 758         views_.push_back(view);
 759
 760         // Add all device signals
 761         update_signals();
 762
 763         // Add all other signals
 764         unordered_set< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
 765
 766         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 767                 const int sb_exists = count_if(
 768                         view_signalbases.cbegin(), view_signalbases.cend(),
 769                         [&](const shared_ptr<data::SignalBase> &sb) {
 770                                 return sb == signalbase;
 771                         });
 772
 773                 // Add the signal to the view if it doesn't have it yet
 774                 if (!sb_exists)
 775                         switch (signalbase->type()) {
 776                         case data::SignalBase::AnalogChannel:
 777                         case data::SignalBase::LogicChannel:
 778                         case data::SignalBase::MathChannel:
 779                                 view->add_signalbase(signalbase);
 780                                 break;
 781                         case data::SignalBase::DecodeChannel:
 782 #ifdef ENABLE_DECODE
 783                                 view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 784 #endif
 785                                 break;
 786                         }
 787         }
 788
 789         signals_changed();
 790 }
 791
 792 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 793 {
 794
 795         std::remove_if(views_.begin(), views_.end(), [&](shared_ptr<views::ViewBase> v) { return v == view; });
 796
 797         if (views_.empty()) {
 798                 main_view_.reset();
 799
 800                 // Without a view there can be no main bar
 801                 main_bar_.reset();
 802         }
 803 }
 804
 805 bool Session::has_view(shared_ptr<views::ViewBase> view)
 806 {
 807         for (shared_ptr<views::ViewBase>& v : views_)
 808                 if (v == view)
 809                         return true;
 810
 811         return false;
 812 }
 813
 814 double Session::get_samplerate() const
 815 {
 816         double samplerate = 0.0;
 817
 818         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 819                 assert(d);
 820                 const vector< shared_ptr<pv::data::Segment> > segments =
 821                         d->segments();
 822                 for (const shared_ptr<pv::data::Segment>& s : segments)
 823                         samplerate = max(samplerate, s->samplerate());
 824         }
 825         // If there is no sample rate given we use samples as unit
 826         if (samplerate == 0.0)
 827                 samplerate = 1.0;
 828
 829         return samplerate;
 830 }
 831
 832 uint32_t Session::get_segment_count() const
 833 {
 834         uint32_t value = 0;
 835
 836         // Find the highest number of segments
 837         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 838                 if (data->get_segment_count() > value)
 839                         value = data->get_segment_count();
 840
 841         return value;
 842 }
 843
 844 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 845 {
 846         vector<util::Timestamp> result;
 847
 848         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 849                 if (entry.first == segment_id)
 850                         result.push_back(entry.second);
 851
 852         return result;
 853 }
 854
 855 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 856 {
 857         return signalbases_;
 858 }
 859
 860 bool Session::all_segments_complete(uint32_t segment_id) const
 861 {
 862         bool all_complete = true;
 863
 864         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 865                 if (!base->segment_is_complete(segment_id))
 866                         all_complete = false;
 867
 868         return all_complete;
 869 }
 870
 871 #ifdef ENABLE_DECODE
 872 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 873 {
 874         shared_ptr<data::DecodeSignal> signal;
 875
 876         try {
 877                 // Create the decode signal
 878                 signal = make_shared<data::DecodeSignal>(*this);
 879
 880                 signalbases_.insert(signal);
 881
 882                 // Add the decode signal to all views
 883                 for (shared_ptr<views::ViewBase>& view : views_)
 884                         view->add_decode_signal(signal);
 885         } catch (runtime_error& e) {
 886                 remove_decode_signal(signal);
 887                 return nullptr;
 888         }
 889
 890         signals_changed();
 891
 892         return signal;
 893 }
 894
 895 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 896 {
 897         signalbases_.erase(signal);
 898
 899         for (shared_ptr<views::ViewBase>& view : views_)
 900                 view->remove_decode_signal(signal);
 901
 902         signals_changed();
 903 }
 904 #endif
 905
 906 void Session::set_capture_state(capture_state state)
 907 {
 908         bool changed;
 909
 910         if (state == Running)
 911                 acq_time_.restart();
 912         if (state == Stopped)
 913                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 914
 915         {
 916                 lock_guard<mutex> lock(sampling_mutex_);
 917                 changed = capture_state_ != state;
 918                 capture_state_ = state;
 919         }
 920
 921         if (changed)
 922                 capture_state_changed(state);
 923 }
 924
 925 void Session::update_signals()
 926 {
 927         if (!device_) {
 928                 signalbases_.clear();
 929                 logic_data_.reset();
 930                 for (shared_ptr<views::ViewBase>& view : views_) {
 931                         view->clear_signals();
 932 #ifdef ENABLE_DECODE
 933                         view->clear_decode_signals();
 934 #endif
 935                 }
 936                 return;
 937         }
 938
 939         lock_guard<recursive_mutex> lock(data_mutex_);
 940
 941         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 942         if (!sr_dev) {
 943                 signalbases_.clear();
 944                 logic_data_.reset();
 945                 for (shared_ptr<views::ViewBase>& view : views_) {
 946                         view->clear_signals();
 947 #ifdef ENABLE_DECODE
 948                         view->clear_decode_signals();
 949 #endif
 950                 }
 951                 return;
 952         }
 953
 954         // Detect what data types we will receive
 955         auto channels = sr_dev->channels();
 956         unsigned int logic_channel_count = count_if(
 957                 channels.begin(), channels.end(),
 958                 [] (shared_ptr<Channel> channel) {
 959                         return channel->type() == sigrok::ChannelType::LOGIC; });
 960
 961         // Create data containers for the logic data segments
 962         {
 963                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 964
 965                 if (logic_channel_count == 0) {
 966                         logic_data_.reset();
 967                 } else if (!logic_data_ ||
 968                         logic_data_->num_channels() != logic_channel_count) {
 969                         logic_data_.reset(new data::Logic(
 970                                 logic_channel_count));
 971                         assert(logic_data_);
 972                 }
 973         }
 974
 975         // Make the signals list
 976         for (shared_ptr<views::ViewBase>& viewbase : views_) {
 977                 views::trace::View *trace_view =
 978                         qobject_cast<views::trace::View*>(viewbase.get());
 979
 980                 if (trace_view) {
 981                         unordered_set< shared_ptr<Signal> > prev_sigs(trace_view->signals());
 982                         trace_view->clear_signals();
 983
 984                         for (auto channel : sr_dev->channels()) {
 985                                 shared_ptr<data::SignalBase> signalbase;
 986                                 shared_ptr<Signal> signal;
 987
 988                                 // Find the channel in the old signals
 989                                 const auto iter = find_if(
 990                                         prev_sigs.cbegin(), prev_sigs.cend(),
 991                                         [&](const shared_ptr<Signal> &s) {
 992                                                 return s->base()->channel() == channel;
 993                                         });
 994                                 if (iter != prev_sigs.end()) {
 995                                         // Copy the signal from the old set to the new
 996                                         signal = *iter;
 997                                         trace_view->add_signal(signal);
 998                                 } else {
 999                                         // Find the signalbase for this channel if possible
1000                                         signalbase.reset();
1001                                         for (const shared_ptr<data::SignalBase>& b : signalbases_)
1002                                                 if (b->channel() == channel)
1003                                                         signalbase = b;
1004
1005                                         shared_ptr<Signal> signal;
1006
1007                                         switch(channel->type()->id()) {
1008                                         case SR_CHANNEL_LOGIC:
1009                                                 if (!signalbase) {
1010                                                         signalbase = make_shared<data::SignalBase>(channel,
1011                                                                 data::SignalBase::LogicChannel);
1012                                                         signalbases_.insert(signalbase);
1013
1014                                                         all_signal_data_.insert(logic_data_);
1015                                                         signalbase->set_data(logic_data_);
1016
1017                                                         connect(this, SIGNAL(capture_state_changed(int)),
1018                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
1019                                                 }
1020
1021                                                 signal = shared_ptr<Signal>(new LogicSignal(*this, device_, signalbase));
1022                                                 break;
1023
1024                                         case SR_CHANNEL_ANALOG:
1025                                         {
1026                                                 if (!signalbase) {
1027                                                         signalbase = make_shared<data::SignalBase>(channel,
1028                                                                 data::SignalBase::AnalogChannel);
1029                                                         signalbases_.insert(signalbase);
1030
1031                                                         shared_ptr<data::Analog> data(new data::Analog());
1032                                                         all_signal_data_.insert(data);
1033                                                         signalbase->set_data(data);
1034
1035                                                         connect(this, SIGNAL(capture_state_changed(int)),
1036                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
1037                                                 }
1038
1039                                                 signal = shared_ptr<Signal>(new AnalogSignal(*this, signalbase));
1040                                                 break;
1041                                         }
1042
1043                                         default:
1044                                                 assert(false);
1045                                                 break;
1046                                         }
1047
1048                                         // New views take their signal settings from the main view
1049                                         if (!viewbase->is_main_view()) {
1050                                                 shared_ptr<pv::views::trace::View> main_tv =
1051                                                         dynamic_pointer_cast<pv::views::trace::View>(main_view_);
1052                                                 shared_ptr<Signal> main_signal =
1053                                                         main_tv->get_signal_by_signalbase(signalbase);
1054                                                 signal->restore_settings(main_signal->save_settings());
1055                                         }
1056
1057                                         trace_view->add_signal(signal);
1058                                 }
1059                         }
1060                 }
1061         }
1062
1063         signals_changed();
1064 }
1065
1066 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
1067         shared_ptr<sigrok::Channel> channel) const
1068 {
1069         for (shared_ptr<data::SignalBase> sig : signalbases_) {
1070                 assert(sig);
1071                 if (sig->channel() == channel)
1072                         return sig;
1073         }
1074         return shared_ptr<data::SignalBase>();
1075 }
1076
1077 void Session::sample_thread_proc(function<void (const QString)> error_handler)
1078 {
1079         assert(error_handler);
1080
1081 #ifdef ENABLE_FLOW
1082         pipeline_ = Pipeline::create();
1083
1084         source_ = ElementFactory::create_element("filesrc", "source");
1085         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
1086
1087         pipeline_->add(source_)->add(sink_);
1088         source_->link(sink_);
1089
1090         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1091
1092         sink_->set_property("emit-signals", TRUE);
1093         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1094
1095         // Get the bus from the pipeline and add a bus watch to the default main context
1096         RefPtr<Bus> bus = pipeline_->get_bus();
1097         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1098
1099         // Start pipeline and Wait until it finished processing
1100         pipeline_done_interrupt_ = false;
1101         pipeline_->set_state(Gst::STATE_PLAYING);
1102
1103         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1104         pipeline_done_cond_.wait(pipeline_done_lock_);
1105
1106         // Let the pipeline free all resources
1107         pipeline_->set_state(Gst::STATE_NULL);
1108
1109 #else
1110         if (!device_)
1111                 return;
1112
1113         try {
1114                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1115         } catch (Error& e) {
1116                 cur_samplerate_ = 0;
1117         }
1118
1119         out_of_memory_ = false;
1120
1121         {
1122                 lock_guard<recursive_mutex> lock(data_mutex_);
1123                 cur_logic_segment_.reset();
1124                 cur_analog_segments_.clear();
1125         }
1126         highest_segment_id_ = -1;
1127         frame_began_ = false;
1128
1129         try {
1130                 device_->start();
1131         } catch (Error& e) {
1132                 error_handler(e.what());
1133                 return;
1134         }
1135
1136         set_capture_state(device_->session()->trigger() ?
1137                 AwaitingTrigger : Running);
1138
1139         try {
1140                 device_->run();
1141         } catch (Error& e) {
1142                 error_handler(e.what());
1143                 set_capture_state(Stopped);
1144                 return;
1145         } catch (QString& e) {
1146                 error_handler(e);
1147                 set_capture_state(Stopped);
1148                 return;
1149         }
1150
1151         set_capture_state(Stopped);
1152
1153         // Confirm that SR_DF_END was received
1154         if (cur_logic_segment_)
1155                 qDebug() << "WARNING: SR_DF_END was not received.";
1156 #endif
1157
1158         // Optimize memory usage
1159         free_unused_memory();
1160
1161         // We now have unsaved data unless we just "captured" from a file
1162         shared_ptr<devices::File> file_device =
1163                 dynamic_pointer_cast<devices::File>(device_);
1164
1165         if (!file_device)
1166                 data_saved_ = false;
1167
1168         if (out_of_memory_)
1169                 error_handler(tr("Out of memory, acquisition stopped."));
1170 }
1171
1172 void Session::free_unused_memory()
1173 {
1174         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1175                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1176
1177                 for (const shared_ptr<data::Segment>& segment : segments)
1178                         segment->free_unused_memory();
1179         }
1180 }
1181
1182 void Session::signal_new_segment()
1183 {
1184         int new_segment_id = 0;
1185
1186         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1187
1188                 // Determine new frame/segment number, assuming that all
1189                 // signals have the same number of frames/segments
1190                 if (cur_logic_segment_) {
1191                         new_segment_id = logic_data_->get_segment_count() - 1;
1192                 } else {
1193                         shared_ptr<sigrok::Channel> any_channel =
1194                                 (*cur_analog_segments_.begin()).first;
1195
1196                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1197                         assert(base);
1198
1199                         shared_ptr<data::Analog> data(base->analog_data());
1200                         assert(data);
1201
1202                         new_segment_id = data->get_segment_count() - 1;
1203                 }
1204         }
1205
1206         if (new_segment_id > highest_segment_id_) {
1207                 highest_segment_id_ = new_segment_id;
1208                 new_segment(highest_segment_id_);
1209         }
1210 }
1211
1212 void Session::signal_segment_completed()
1213 {
1214         int segment_id = 0;
1215
1216         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1217                 // We only care about analog and logic channels, not derived ones
1218                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1219                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1220                         break;
1221                 }
1222
1223                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1224                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1225                         break;
1226                 }
1227         }
1228
1229         if (segment_id >= 0)
1230                 segment_completed(segment_id);
1231 }
1232
1233 #ifdef ENABLE_FLOW
1234 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1235 {
1236         (void)bus;
1237
1238         if ((message->get_source() == pipeline_) && \
1239                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1240                 pipeline_done_cond_.notify_one();
1241
1242         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1243
1244         return true;
1245 }
1246
1247 Gst::FlowReturn Session::on_gst_new_sample()
1248 {
1249         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1250         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1251
1252         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1253                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1254                 Gst::MapInfo mapinfo;
1255                 buf_mem->map(mapinfo, Gst::MAP_READ);
1256
1257                 shared_ptr<sigrok::Packet> logic_packet =
1258                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1259
1260                 try {
1261                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1262                 } catch (bad_alloc&) {
1263                         out_of_memory_ = true;
1264                         device_->stop();
1265                         buf_mem->unmap(mapinfo);
1266                         return Gst::FLOW_ERROR;
1267                 }
1268
1269                 buf_mem->unmap(mapinfo);
1270         }
1271
1272         return Gst::FLOW_OK;
1273 }
1274 #endif
1275
1276 void Session::feed_in_header()
1277 {
1278         // Nothing to do here for now
1279 }
1280
1281 void Session::feed_in_meta(shared_ptr<Meta> meta)
1282 {
1283         for (auto& entry : meta->config()) {
1284                 switch (entry.first->id()) {
1285                 case SR_CONF_SAMPLERATE:
1286                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1287                         break;
1288                 default:
1289                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1290                         break;
1291                 }
1292         }
1293
1294         signals_changed();
1295 }
1296
1297 void Session::feed_in_trigger()
1298 {
1299         // The channel containing most samples should be most accurate
1300         uint64_t sample_count = 0;
1301
1302         {
1303                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1304                         assert(d);
1305                         uint64_t temp_count = 0;
1306
1307                         const vector< shared_ptr<pv::data::Segment> > segments =
1308                                 d->segments();
1309                         for (const shared_ptr<pv::data::Segment> &s : segments)
1310                                 temp_count += s->get_sample_count();
1311
1312                         if (temp_count > sample_count)
1313                                 sample_count = temp_count;
1314                 }
1315         }
1316
1317         uint32_t segment_id = 0;  // Default segment when no frames are used
1318
1319         // If a frame began, we'd ideally be able to use the highest segment ID for
1320         // the trigger. However, as new segments are only created when logic or
1321         // analog data comes in, this doesn't work if the trigger appears right
1322         // after the beginning of the frame, before any sample data.
1323         // For this reason, we use highest segment ID + 1 if no sample data came in
1324         // yet and the highest segment ID otherwise.
1325         if (frame_began_) {
1326                 segment_id = highest_segment_id_;
1327                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1328                         segment_id++;
1329         }
1330
1331         // TODO Create timestamp from segment start time + segment's current sample count
1332         util::Timestamp timestamp = sample_count / get_samplerate();
1333         trigger_list_.emplace_back(segment_id, timestamp);
1334         trigger_event(segment_id, timestamp);
1335 }
1336
1337 void Session::feed_in_frame_begin()
1338 {
1339         frame_began_ = true;
1340 }
1341
1342 void Session::feed_in_frame_end()
1343 {
1344         if (!frame_began_)
1345                 return;
1346
1347         {
1348                 lock_guard<recursive_mutex> lock(data_mutex_);
1349
1350                 if (cur_logic_segment_)
1351                         cur_logic_segment_->set_complete();
1352
1353                 for (auto& entry : cur_analog_segments_) {
1354                         shared_ptr<data::AnalogSegment> segment = entry.second;
1355                         segment->set_complete();
1356                 }
1357
1358                 cur_logic_segment_.reset();
1359                 cur_analog_segments_.clear();
1360         }
1361
1362         frame_began_ = false;
1363
1364         signal_segment_completed();
1365 }
1366
1367 void Session::feed_in_logic(shared_ptr<Logic> logic)
1368 {
1369         if (logic->data_length() == 0) {
1370                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1371                 return;
1372         }
1373
1374         if (logic->unit_size() > 8)
1375                 throw QString(tr("Can't handle more than 64 logic channels."));
1376
1377         if (!cur_samplerate_)
1378                 try {
1379                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1380                 } catch (Error& e) {
1381                         // Do nothing
1382                 }
1383
1384         lock_guard<recursive_mutex> lock(data_mutex_);
1385
1386         if (!logic_data_) {
1387                 // The only reason logic_data_ would not have been created is
1388                 // if it was not possible to determine the signals when the
1389                 // device was created.
1390                 update_signals();
1391         }
1392
1393         if (!cur_logic_segment_) {
1394                 // This could be the first packet after a trigger
1395                 set_capture_state(Running);
1396
1397                 // Create a new data segment
1398                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1399                         *logic_data_, logic_data_->get_segment_count(),
1400                         logic->unit_size(), cur_samplerate_);
1401                 logic_data_->push_segment(cur_logic_segment_);
1402
1403                 signal_new_segment();
1404         }
1405
1406         cur_logic_segment_->append_payload(logic);
1407
1408         data_received();
1409 }
1410
1411 void Session::feed_in_analog(shared_ptr<Analog> analog)
1412 {
1413         if (analog->num_samples() == 0) {
1414                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1415                 return;
1416         }
1417
1418         if (!cur_samplerate_)
1419                 try {
1420                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1421                 } catch (Error& e) {
1422                         // Do nothing
1423                 }
1424
1425         lock_guard<recursive_mutex> lock(data_mutex_);
1426
1427         const vector<shared_ptr<Channel>> channels = analog->channels();
1428         bool sweep_beginning = false;
1429
1430         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1431         analog->get_data_as_float(data.get());
1432
1433         if (signalbases_.empty())
1434                 update_signals();
1435
1436         float *channel_data = data.get();
1437         for (auto& channel : channels) {
1438                 shared_ptr<data::AnalogSegment> segment;
1439
1440                 // Try to get the segment of the channel
1441                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1442                         iterator iter = cur_analog_segments_.find(channel);
1443                 if (iter != cur_analog_segments_.end())
1444                         segment = (*iter).second;
1445                 else {
1446                         // If no segment was found, this means we haven't
1447                         // created one yet. i.e. this is the first packet
1448                         // in the sweep containing this segment.
1449                         sweep_beginning = true;
1450
1451                         // Find the analog data associated with the channel
1452                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1453                         assert(base);
1454
1455                         shared_ptr<data::Analog> data(base->analog_data());
1456                         assert(data);
1457
1458                         // Create a segment, keep it in the maps of channels
1459                         segment = make_shared<data::AnalogSegment>(
1460                                 *data, data->get_segment_count(), cur_samplerate_);
1461                         cur_analog_segments_[channel] = segment;
1462
1463                         // Push the segment into the analog data.
1464                         data->push_segment(segment);
1465
1466                         signal_new_segment();
1467                 }
1468
1469                 assert(segment);
1470
1471                 // Append the samples in the segment
1472                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1473                         channels.size());
1474         }
1475
1476         if (sweep_beginning) {
1477                 // This could be the first packet after a trigger
1478                 set_capture_state(Running);
1479         }
1480
1481         data_received();
1482 }
1483
1484 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1485         shared_ptr<Packet> packet)
1486 {
1487         (void)device;
1488
1489         assert(device);
1490         assert(device == device_->device());
1491         assert(packet);
1492
1493         switch (packet->type()->id()) {
1494         case SR_DF_HEADER:
1495                 feed_in_header();
1496                 break;
1497
1498         case SR_DF_META:
1499                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1500                 break;
1501
1502         case SR_DF_TRIGGER:
1503                 feed_in_trigger();
1504                 break;
1505
1506         case SR_DF_LOGIC:
1507                 try {
1508                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1509                 } catch (bad_alloc&) {
1510                         out_of_memory_ = true;
1511                         device_->stop();
1512                 }
1513                 break;
1514
1515         case SR_DF_ANALOG:
1516                 try {
1517                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1518                 } catch (bad_alloc&) {
1519                         out_of_memory_ = true;
1520                         device_->stop();
1521                 }
1522                 break;
1523
1524         case SR_DF_FRAME_BEGIN:
1525                 feed_in_frame_begin();
1526                 break;
1527
1528         case SR_DF_FRAME_END:
1529                 feed_in_frame_end();
1530                 break;
1531
1532         case SR_DF_END:
1533                 // Strictly speaking, this is performed when a frame end marker was
1534                 // received, so there's no point doing this again. However, not all
1535                 // devices use frames, and for those devices, we need to do it here.
1536                 {
1537                         lock_guard<recursive_mutex> lock(data_mutex_);
1538
1539                         if (cur_logic_segment_)
1540                                 cur_logic_segment_->set_complete();
1541
1542                         for (auto& entry : cur_analog_segments_) {
1543                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1544                                 segment->set_complete();
1545                         }
1546
1547                         cur_logic_segment_.reset();
1548                         cur_analog_segments_.clear();
1549                 }
1550                 break;
1551
1552         default:
1553                 break;
1554         }
1555 }
1556
1557 void Session::on_data_saved()
1558 {
1559         data_saved_ = true;
1560 }
1561
1562 #ifdef ENABLE_DECODE
1563 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1564 {
1565         assert(decoders.size() > 0);
1566
1567         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1568
1569         if (signal)
1570                 for (unsigned int i = 0; i < decoders.size(); i++) {
1571                         const srd_decoder* d = decoders[i];
1572                         signal->stack_decoder(d, !(i < decoders.size() - 1));
1573                 }
1574 }
1575 #endif
1576
1577 } // namespace pv