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