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::data::SignalGroup;
 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         shutting_down_(false),
 120         device_manager_(device_manager),
 121         default_name_(name),
 122         name_(name),
 123         capture_state_(Stopped),
 124         cur_samplerate_(0),
 125         data_saved_(true)
 126 {
 127 }
 128
 129 Session::~Session()
 130 {
 131         shutting_down_ = true;
 132
 133         // Stop and join to the thread
 134         stop_capture();
 135
 136         for (SignalGroup* group : signal_groups_) {
 137                 group->clear();
 138                 delete group;
 139         }
 140 }
 141
 142 DeviceManager& Session::device_manager()
 143 {
 144         return device_manager_;
 145 }
 146
 147 const DeviceManager& Session::device_manager() const
 148 {
 149         return device_manager_;
 150 }
 151
 152 shared_ptr<sigrok::Session> Session::session() const
 153 {
 154         if (!device_)
 155                 return shared_ptr<sigrok::Session>();
 156         return device_->session();
 157 }
 158
 159 shared_ptr<devices::Device> Session::device() const
 160 {
 161         return device_;
 162 }
 163
 164 QString Session::name() const
 165 {
 166         return name_;
 167 }
 168
 169 void Session::set_name(QString name)
 170 {
 171         if (default_name_.isEmpty())
 172                 default_name_ = name;
 173
 174         name_ = name;
 175
 176         name_changed();
 177 }
 178
 179 QString Session::save_path() const
 180 {
 181         return save_path_;
 182 }
 183
 184 void Session::set_save_path(QString path)
 185 {
 186         save_path_ = path;
 187 }
 188
 189 const vector< shared_ptr<views::ViewBase> > Session::views() const
 190 {
 191         return views_;
 192 }
 193
 194 shared_ptr<views::ViewBase> Session::main_view() const
 195 {
 196         return main_view_;
 197 }
 198
 199 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 200 {
 201         main_bar_ = main_bar;
 202 }
 203
 204 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 205 {
 206         return main_bar_;
 207 }
 208
 209 bool Session::data_saved() const
 210 {
 211         return data_saved_;
 212 }
 213
 214 void Session::save_setup(QSettings &settings) const
 215 {
 216         int i = 0;
 217
 218         // Save channels and decoders
 219         for (const shared_ptr<data::SignalBase>& base : signalbases_) {
 220 #ifdef ENABLE_DECODE
 221                 if (base->is_decode_signal()) {
 222                         settings.beginGroup("decode_signal" + QString::number(i++));
 223                         base->save_settings(settings);
 224                         settings.endGroup();
 225                 } else
 226 #endif
 227                 {
 228                         settings.beginGroup(base->internal_name());
 229                         base->save_settings(settings);
 230                         settings.endGroup();
 231                 }
 232         }
 233
 234         settings.setValue("decode_signals", i);
 235
 236         // Save view states and their signal settings
 237         // Note: main_view must be saved as view0
 238         i = 0;
 239         settings.beginGroup("view" + QString::number(i++));
 240         main_view_->save_settings(settings);
 241         settings.endGroup();
 242
 243         for (const shared_ptr<views::ViewBase>& view : views_) {
 244                 if (view != main_view_) {
 245                         settings.beginGroup("view" + QString::number(i++));
 246                         settings.setValue("type", view->get_type());
 247                         view->save_settings(settings);
 248                         settings.endGroup();
 249                 }
 250         }
 251
 252         settings.setValue("views", i);
 253
 254         int view_id = 0;
 255         i = 0;
 256         for (const shared_ptr<views::ViewBase>& vb : views_) {
 257                 shared_ptr<views::trace::View> tv = dynamic_pointer_cast<views::trace::View>(vb);
 258                 if (tv) {
 259                         for (const shared_ptr<views::trace::TimeItem>& time_item : tv->time_items()) {
 260
 261                                 const shared_ptr<views::trace::Flag> flag =
 262                                         dynamic_pointer_cast<views::trace::Flag>(time_item);
 263                                 if (flag) {
 264                                         if (!flag->enabled())
 265                                                 continue;
 266
 267                                         settings.beginGroup("meta_obj" + QString::number(i++));
 268                                         settings.setValue("type", "time_marker");
 269                                         settings.setValue("assoc_view", view_id);
 270                                         GlobalSettings::store_timestamp(settings, "time", flag->time());
 271                                         settings.setValue("text", flag->get_text());
 272                                         settings.endGroup();
 273                                 }
 274                         }
 275
 276                         if (tv->cursors_shown()) {
 277                                 settings.beginGroup("meta_obj" + QString::number(i++));
 278                                 settings.setValue("type", "selection");
 279                                 settings.setValue("assoc_view", view_id);
 280                                 const shared_ptr<views::trace::CursorPair> cp = tv->cursors();
 281                                 GlobalSettings::store_timestamp(settings, "start_time", cp->first()->time());
 282                                 GlobalSettings::store_timestamp(settings, "end_time", cp->second()->time());
 283                                 settings.endGroup();
 284                         }
 285                 }
 286
 287                 view_id++;
 288         }
 289
 290         settings.setValue("meta_objs", i);
 291 }
 292
 293 void Session::save_settings(QSettings &settings) const
 294 {
 295         map<string, string> dev_info;
 296         list<string> key_list;
 297
 298         if (device_) {
 299                 shared_ptr<devices::HardwareDevice> hw_device =
 300                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 301
 302                 if (hw_device) {
 303                         settings.setValue("device_type", "hardware");
 304                         settings.beginGroup("device");
 305
 306                         key_list.emplace_back("vendor");
 307                         key_list.emplace_back("model");
 308                         key_list.emplace_back("version");
 309                         key_list.emplace_back("serial_num");
 310                         key_list.emplace_back("connection_id");
 311
 312                         dev_info = device_manager_.get_device_info(device_);
 313
 314                         for (string& key : key_list) {
 315                                 if (dev_info.count(key))
 316                                         settings.setValue(QString::fromUtf8(key.c_str()),
 317                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 318                                 else
 319                                         settings.remove(QString::fromUtf8(key.c_str()));
 320                         }
 321
 322                         settings.endGroup();
 323                 }
 324
 325                 shared_ptr<devices::SessionFile> sessionfile_device =
 326                         dynamic_pointer_cast<devices::SessionFile>(device_);
 327
 328                 if (sessionfile_device) {
 329                         settings.setValue("device_type", "sessionfile");
 330                         settings.beginGroup("device");
 331                         settings.setValue("filename", QString::fromStdString(
 332                                 sessionfile_device->full_name()));
 333                         settings.endGroup();
 334                 }
 335
 336                 shared_ptr<devices::InputFile> inputfile_device =
 337                         dynamic_pointer_cast<devices::InputFile>(device_);
 338
 339                 if (inputfile_device) {
 340                         settings.setValue("device_type", "inputfile");
 341                         settings.beginGroup("device");
 342                         inputfile_device->save_meta_to_settings(settings);
 343                         settings.endGroup();
 344                 }
 345
 346                 save_setup(settings);
 347         }
 348 }
 349
 350 void Session::restore_setup(QSettings &settings)
 351 {
 352         // Restore channels
 353         for (shared_ptr<data::SignalBase> base : signalbases_) {
 354                 settings.beginGroup(base->internal_name());
 355                 base->restore_settings(settings);
 356                 settings.endGroup();
 357         }
 358
 359         // Restore decoders
 360 #ifdef ENABLE_DECODE
 361         int decode_signals = settings.value("decode_signals").toInt();
 362
 363         for (int i = 0; i < decode_signals; i++) {
 364                 settings.beginGroup("decode_signal" + QString::number(i));
 365                 shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 366                 signal->restore_settings(settings);
 367                 settings.endGroup();
 368         }
 369 #endif
 370
 371         // Restore views
 372         int views = settings.value("views").toInt();
 373
 374         for (int i = 0; i < views; i++) {
 375                 settings.beginGroup("view" + QString::number(i));
 376
 377                 if (i > 0) {
 378                         views::ViewType type = (views::ViewType)settings.value("type").toInt();
 379                         add_view(type, this);
 380                         views_.back()->restore_settings(settings);
 381                 } else
 382                         main_view_->restore_settings(settings);
 383
 384                 settings.endGroup();
 385         }
 386
 387         // Restore meta objects like markers and cursors
 388         int meta_objs = settings.value("meta_objs").toInt();
 389
 390         for (int i = 0; i < meta_objs; i++) {
 391                 settings.beginGroup("meta_obj" + QString::number(i));
 392
 393                 shared_ptr<views::ViewBase> vb;
 394                 shared_ptr<views::trace::View> tv;
 395                 if (settings.contains("assoc_view"))
 396                         vb = views_.at(settings.value("assoc_view").toInt());
 397
 398                 if (vb)
 399                         tv = dynamic_pointer_cast<views::trace::View>(vb);
 400
 401                 const QString type = settings.value("type").toString();
 402
 403                 if ((type == "time_marker") && tv) {
 404                         Timestamp ts = GlobalSettings::restore_timestamp(settings, "time");
 405                         shared_ptr<views::trace::Flag> flag = tv->add_flag(ts);
 406                         flag->set_text(settings.value("text").toString());
 407                 }
 408
 409                 if ((type == "selection") && tv) {
 410                         Timestamp start = GlobalSettings::restore_timestamp(settings, "start_time");
 411                         Timestamp end = GlobalSettings::restore_timestamp(settings, "end_time");
 412                         tv->set_cursors(start, end);
 413                         tv->show_cursors();
 414                 }
 415
 416                 settings.endGroup();
 417         }
 418 }
 419
 420 void Session::restore_settings(QSettings &settings)
 421 {
 422         shared_ptr<devices::Device> device;
 423
 424         const QString device_type = settings.value("device_type").toString();
 425
 426         if (device_type == "hardware") {
 427                 map<string, string> dev_info;
 428                 list<string> key_list;
 429
 430                 // Re-select last used device if possible but only if it's not demo
 431                 settings.beginGroup("device");
 432                 key_list.emplace_back("vendor");
 433                 key_list.emplace_back("model");
 434                 key_list.emplace_back("version");
 435                 key_list.emplace_back("serial_num");
 436                 key_list.emplace_back("connection_id");
 437
 438                 for (string key : key_list) {
 439                         const QString k = QString::fromStdString(key);
 440                         if (!settings.contains(k))
 441                                 continue;
 442
 443                         const string value = settings.value(k).toString().toStdString();
 444                         if (!value.empty())
 445                                 dev_info.insert(make_pair(key, value));
 446                 }
 447
 448                 if (dev_info.count("model") > 0)
 449                         device = device_manager_.find_device_from_info(dev_info);
 450
 451                 if (device)
 452                         set_device(device);
 453
 454                 settings.endGroup();
 455         }
 456
 457
 458         QString filename;
 459         if ((device_type == "sessionfile") || (device_type == "inputfile")) {
 460                 if (device_type == "sessionfile") {
 461                         settings.beginGroup("device");
 462                         filename = settings.value("filename").toString();
 463                         settings.endGroup();
 464
 465                         if (QFileInfo(filename).isReadable())
 466                                 device = make_shared<devices::SessionFile>(device_manager_.context(),
 467                                         filename.toStdString());
 468                 }
 469
 470                 if (device_type == "inputfile") {
 471                         settings.beginGroup("device");
 472                         device = make_shared<devices::InputFile>(device_manager_.context(),
 473                                 settings);
 474                         settings.endGroup();
 475                 }
 476
 477                 if (device) {
 478                         set_device(device);
 479
 480                         start_capture([](QString infoMessage) {
 481                                 // TODO Emulate noquote()
 482                                 qDebug() << "Session error:" << infoMessage; });
 483
 484                         set_name(QString::fromStdString(
 485                                 dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 486
 487                         if (!filename.isEmpty()) {
 488                                 // Only set the save path if we load an srzip file
 489                                 if (device_type == "sessionfile")
 490                                         set_save_path(QFileInfo(filename).absolutePath());
 491
 492                                 set_name(QFileInfo(filename).fileName());
 493                         }
 494                 }
 495         }
 496
 497         if (device)
 498                 restore_setup(settings);
 499 }
 500
 501 void Session::select_device(shared_ptr<devices::Device> device)
 502 {
 503         try {
 504                 if (device)
 505                         set_device(device);
 506                 else
 507                         set_default_device();
 508         } catch (const QString &e) {
 509                 MainWindow::show_session_error(tr("Failed to select device"), e);
 510         }
 511 }
 512
 513 void Session::set_device(shared_ptr<devices::Device> device)
 514 {
 515         assert(device);
 516
 517         // Ensure we are not capturing before setting the device
 518         stop_capture();
 519
 520         if (device_)
 521                 device_->close();
 522
 523         device_.reset();
 524
 525         // Revert name back to default name (e.g. "Session 1") as the data is gone
 526         name_ = default_name_;
 527         name_changed();
 528
 529         // Remove all stored data and reset all views
 530         for (shared_ptr<views::ViewBase> view : views_) {
 531                 view->clear_signalbases();
 532 #ifdef ENABLE_DECODE
 533                 view->clear_decode_signals();
 534 #endif
 535                 view->reset_view_state();
 536         }
 537
 538         for (SignalGroup* group : signal_groups_) {
 539                 group->clear();
 540                 delete group;
 541         }
 542         signal_groups_.clear();
 543
 544         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 545                 d->clear();
 546
 547         all_signal_data_.clear();
 548         signalbases_.clear();
 549         cur_logic_segment_.reset();
 550
 551         for (auto& entry : cur_analog_segments_) {
 552                 shared_ptr<sigrok::Channel>(entry.first).reset();
 553                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 554         }
 555
 556         logic_data_.reset();
 557
 558         signals_changed();
 559
 560         device_ = move(device);
 561
 562         try {
 563                 device_->open();
 564         } catch (const QString &e) {
 565                 device_.reset();
 566                 MainWindow::show_session_error(tr("Failed to open device"), e);
 567         }
 568
 569         if (device_) {
 570                 device_->session()->add_datafeed_callback([=]
 571                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 572                                 data_feed_in(device, packet);
 573                         });
 574
 575                 update_signals();
 576         }
 577
 578         device_changed();
 579 }
 580
 581 void Session::set_default_device()
 582 {
 583         const list< shared_ptr<devices::HardwareDevice> > &devices =
 584                 device_manager_.devices();
 585
 586         if (devices.empty())
 587                 return;
 588
 589         // Try and find the demo device and select that by default
 590         const auto iter = find_if(devices.begin(), devices.end(),
 591                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 592                         return d->hardware_device()->driver()->name() == "demo"; });
 593         set_device((iter == devices.end()) ? devices.front() : *iter);
 594 }
 595
 596 bool Session::using_file_device() const
 597 {
 598         shared_ptr<devices::SessionFile> sessionfile_device =
 599                 dynamic_pointer_cast<devices::SessionFile>(device_);
 600
 601         shared_ptr<devices::InputFile> inputfile_device =
 602                 dynamic_pointer_cast<devices::InputFile>(device_);
 603
 604         return (sessionfile_device || inputfile_device);
 605 }
 606
 607 /**
 608  * Convert generic options to data types that are specific to InputFormat.
 609  *
 610  * @param[in] user_spec Vector of tokenized words, string format.
 611  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 612  *
 613  * @return Map of options suitable for InputFormat::create_input().
 614  */
 615 map<string, Glib::VariantBase>
 616 Session::input_format_options(vector<string> user_spec,
 617                 map<string, shared_ptr<Option>> fmt_opts)
 618 {
 619         map<string, Glib::VariantBase> result;
 620
 621         for (auto& entry : user_spec) {
 622                 /*
 623                  * Split key=value specs. Accept entries without separator
 624                  * (for simplified boolean specifications).
 625                  */
 626                 string key, val;
 627                 size_t pos = entry.find("=");
 628                 if (pos == std::string::npos) {
 629                         key = entry;
 630                         val = "";
 631                 } else {
 632                         key = entry.substr(0, pos);
 633                         val = entry.substr(pos + 1);
 634                 }
 635
 636                 /*
 637                  * Skip user specifications that are not a member of the
 638                  * format's set of supported options. Have the text input
 639                  * spec converted to the required input format specific
 640                  * data type.
 641                  */
 642                 auto found = fmt_opts.find(key);
 643                 if (found == fmt_opts.end()) {
 644                         qCritical() << "Supplied input option" << QString::fromStdString(key) <<
 645                                 "is not a valid option for this input module, it will be ignored!";
 646                         continue;
 647                 }
 648
 649                 shared_ptr<Option> opt = found->second;
 650                 result[key] = opt->parse_string(val);
 651         }
 652
 653         return result;
 654 }
 655
 656 void Session::load_init_file(const string &file_name,
 657         const string &format, const string &setup_file_name)
 658 {
 659         shared_ptr<InputFormat> input_format;
 660         map<string, Glib::VariantBase> input_opts;
 661
 662         if (!format.empty()) {
 663                 const map<string, shared_ptr<InputFormat> > formats =
 664                         device_manager_.context()->input_formats();
 665                 auto user_opts = pv::util::split_string(format, ":");
 666                 string user_name = user_opts.front();
 667                 user_opts.erase(user_opts.begin());
 668                 const auto iter = find_if(formats.begin(), formats.end(),
 669                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 670                                 return f.first == user_name; });
 671                 if (iter == formats.end()) {
 672                         MainWindow::show_session_error(tr("Error"),
 673                                 tr("Unexpected input format: %1").arg(QString::fromStdString(format)));
 674                         return;
 675                 }
 676                 input_format = (*iter).second;
 677                 input_opts = input_format_options(user_opts,
 678                         input_format->options());
 679         }
 680
 681         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 682                 input_format, input_opts);
 683 }
 684
 685 void Session::load_file(QString file_name, QString setup_file_name,
 686         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 687 {
 688         const QString errorMessage(
 689                 QString("Failed to load file %1").arg(file_name));
 690
 691         // In the absence of a caller's format spec, try to auto detect.
 692         // Assume "sigrok session file" upon lookup miss.
 693         if (!format)
 694                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 695         try {
 696                 if (format)
 697                         set_device(shared_ptr<devices::Device>(
 698                                 new devices::InputFile(
 699                                         device_manager_.context(),
 700                                         file_name.toStdString(),
 701                                         format, options)));
 702                 else
 703                         set_device(shared_ptr<devices::Device>(
 704                                 new devices::SessionFile(
 705                                         device_manager_.context(),
 706                                         file_name.toStdString())));
 707         } catch (Error& e) {
 708                 MainWindow::show_session_error(tr("Failed to load %1").arg(file_name), e.what());
 709                 set_default_device();
 710                 main_bar_->update_device_list();
 711                 return;
 712         }
 713
 714         // Use the input file with .pvs extension if no setup file was given
 715         if (setup_file_name.isEmpty()) {
 716                 setup_file_name = file_name;
 717                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 718                 setup_file_name.append(".pvs");
 719         }
 720
 721         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 722                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 723                 restore_setup(settings_storage);
 724         }
 725
 726         main_bar_->update_device_list();
 727
 728         start_capture([&, errorMessage](QString infoMessage) {
 729                 MainWindow::show_session_error(errorMessage, infoMessage); });
 730
 731         // Only set save path if we loaded an srzip file
 732         if (dynamic_pointer_cast<devices::SessionFile>(device_))
 733                 set_save_path(QFileInfo(file_name).absolutePath());
 734
 735         set_name(QFileInfo(file_name).fileName());
 736 }
 737
 738 Session::capture_state Session::get_capture_state() const
 739 {
 740         lock_guard<mutex> lock(sampling_mutex_);
 741         return capture_state_;
 742 }
 743
 744 void Session::start_capture(function<void (const QString)> error_handler)
 745 {
 746         if (!device_) {
 747                 error_handler(tr("No active device set, can't start acquisition."));
 748                 return;
 749         }
 750
 751         stop_capture();
 752
 753         // Check that at least one channel is enabled
 754         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 755         if (sr_dev) {
 756                 const auto channels = sr_dev->channels();
 757                 if (!any_of(channels.begin(), channels.end(),
 758                         [](shared_ptr<Channel> channel) {
 759                                 return channel->enabled(); })) {
 760                         error_handler(tr("No channels enabled."));
 761                         return;
 762                 }
 763         }
 764
 765         // Clear signal data
 766         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 767                 d->clear();
 768
 769         trigger_list_.clear();
 770
 771         // Revert name back to default name (e.g. "Session 1") for real devices
 772         // as the (possibly saved) data is gone. File devices keep their name.
 773         shared_ptr<devices::HardwareDevice> hw_device =
 774                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 775
 776         if (hw_device) {
 777                 name_ = default_name_;
 778                 name_changed();
 779         }
 780
 781         // Begin the session
 782         sampling_thread_ = std::thread(
 783                 &Session::sample_thread_proc, this, error_handler);
 784 }
 785
 786 void Session::stop_capture()
 787 {
 788         if (get_capture_state() != Stopped)
 789                 device_->stop();
 790
 791         // Check that sampling stopped
 792         if (sampling_thread_.joinable())
 793                 sampling_thread_.join();
 794 }
 795
 796 void Session::register_view(shared_ptr<views::ViewBase> view)
 797 {
 798         if (views_.empty())
 799                 main_view_ = view;
 800
 801         views_.push_back(view);
 802
 803         // Add all device signals
 804         update_signals();
 805
 806         // Add all other signals
 807         vector< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
 808
 809         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 810                 const int sb_exists = count_if(
 811                         view_signalbases.cbegin(), view_signalbases.cend(),
 812                         [&](const shared_ptr<data::SignalBase> &sb) {
 813                                 return sb == signalbase;
 814                         });
 815
 816                 // Add the signal to the view if it doesn't have it yet
 817                 if (!sb_exists)
 818                         switch (signalbase->type()) {
 819                         case data::SignalBase::AnalogChannel:
 820                         case data::SignalBase::LogicChannel:
 821                         case data::SignalBase::MathChannel:
 822                                 view->add_signalbase(signalbase);
 823                                 break;
 824                         case data::SignalBase::DecodeChannel:
 825 #ifdef ENABLE_DECODE
 826                                 view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 827 #endif
 828                                 break;
 829                         }
 830         }
 831
 832         signals_changed();
 833 }
 834
 835 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 836 {
 837         views_.erase(std::remove_if(views_.begin(), views_.end(),
 838                 [&](shared_ptr<views::ViewBase> v) { return v == view; }),
 839                 views_.end());
 840
 841         if (views_.empty()) {
 842                 main_view_.reset();
 843
 844                 // Without a view there can be no main bar
 845                 main_bar_.reset();
 846         }
 847 }
 848
 849 bool Session::has_view(shared_ptr<views::ViewBase> view)
 850 {
 851         for (shared_ptr<views::ViewBase>& v : views_)
 852                 if (v == view)
 853                         return true;
 854
 855         return false;
 856 }
 857
 858 double Session::get_samplerate() const
 859 {
 860         double samplerate = 0.0;
 861
 862         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 863                 assert(d);
 864                 const vector< shared_ptr<pv::data::Segment> > segments =
 865                         d->segments();
 866                 for (const shared_ptr<pv::data::Segment>& s : segments)
 867                         samplerate = max(samplerate, s->samplerate());
 868         }
 869         // If there is no sample rate given we use samples as unit
 870         if (samplerate == 0.0)
 871                 samplerate = 1.0;
 872
 873         return samplerate;
 874 }
 875
 876 uint32_t Session::get_segment_count() const
 877 {
 878         uint32_t value = 0;
 879
 880         // Find the highest number of segments
 881         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 882                 if (data->get_segment_count() > value)
 883                         value = data->get_segment_count();
 884
 885         return value;
 886 }
 887
 888 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 889 {
 890         vector<util::Timestamp> result;
 891
 892         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 893                 if (entry.first == segment_id)
 894                         result.push_back(entry.second);
 895
 896         return result;
 897 }
 898
 899 const vector< shared_ptr<data::SignalBase> > Session::signalbases() const
 900 {
 901         return signalbases_;
 902 }
 903
 904 void Session::add_generated_signal(shared_ptr<data::SignalBase> signal)
 905 {
 906         signalbases_.push_back(signal);
 907
 908         for (shared_ptr<views::ViewBase>& view : views_)
 909                 view->add_signalbase(signal);
 910
 911         update_signals();
 912 }
 913
 914 void Session::remove_generated_signal(shared_ptr<data::SignalBase> signal)
 915 {
 916         if (shutting_down_)
 917                 return;
 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_signalbase(signal);
 925
 926         update_signals();
 927 }
 928
 929 #ifdef ENABLE_DECODE
 930 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 931 {
 932         shared_ptr<data::DecodeSignal> signal;
 933
 934         try {
 935                 // Create the decode signal
 936                 signal = make_shared<data::DecodeSignal>(*this);
 937
 938                 signalbases_.push_back(signal);
 939
 940                 // Add the decode signal to all views
 941                 for (shared_ptr<views::ViewBase>& view : views_)
 942                         view->add_decode_signal(signal);
 943         } catch (runtime_error& e) {
 944                 remove_decode_signal(signal);
 945                 return nullptr;
 946         }
 947
 948         signals_changed();
 949
 950         return signal;
 951 }
 952
 953 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 954 {
 955         if (shutting_down_)
 956                 return;
 957
 958         signalbases_.erase(std::remove_if(signalbases_.begin(), signalbases_.end(),
 959                 [&](shared_ptr<data::SignalBase> s) { return s == signal; }),
 960                 signalbases_.end());
 961
 962         for (shared_ptr<views::ViewBase>& view : views_)
 963                 view->remove_decode_signal(signal);
 964
 965         signals_changed();
 966 }
 967 #endif
 968
 969 bool Session::all_segments_complete(uint32_t segment_id) const
 970 {
 971         bool all_complete = true;
 972
 973         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 974                 if (!base->segment_is_complete(segment_id))
 975                         all_complete = false;
 976
 977         return all_complete;
 978 }
 979
 980 MetadataObjManager* Session::metadata_obj_manager()
 981 {
 982         return &metadata_obj_manager_;
 983 }
 984
 985 void Session::set_capture_state(capture_state state)
 986 {
 987         bool changed;
 988
 989         if (state == Running)
 990                 acq_time_.restart();
 991         if (state == Stopped)
 992                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 993
 994         {
 995                 lock_guard<mutex> lock(sampling_mutex_);
 996                 changed = capture_state_ != state;
 997                 capture_state_ = state;
 998         }
 999
1000         if (changed)
1001                 capture_state_changed(state);
1002 }
1003
1004 void Session::update_signals()
1005 {
1006         if (!device_) {
1007                 signalbases_.clear();
1008                 logic_data_.reset();
1009                 for (shared_ptr<views::ViewBase>& view : views_) {
1010                         view->clear_signalbases();
1011 #ifdef ENABLE_DECODE
1012                         view->clear_decode_signals();
1013 #endif
1014                 }
1015                 return;
1016         }
1017
1018         lock_guard<recursive_mutex> lock(data_mutex_);
1019
1020         const shared_ptr<sigrok::Device> sr_dev = device_->device();
1021         if (!sr_dev) {
1022                 signalbases_.clear();
1023                 logic_data_.reset();
1024                 for (shared_ptr<views::ViewBase>& view : views_) {
1025                         view->clear_signalbases();
1026 #ifdef ENABLE_DECODE
1027                         view->clear_decode_signals();
1028 #endif
1029                 }
1030                 return;
1031         }
1032
1033         // Detect what data types we will receive
1034         auto channels = sr_dev->channels();
1035         unsigned int logic_channel_count = count_if(
1036                 channels.begin(), channels.end(),
1037                 [] (shared_ptr<Channel> channel) {
1038                         return channel->type() == sigrok::ChannelType::LOGIC; });
1039
1040         // Create a common data container for the logic signalbases
1041         {
1042                 lock_guard<recursive_mutex> data_lock(data_mutex_);
1043
1044                 if (logic_channel_count == 0) {
1045                         logic_data_.reset();
1046                 } else if (!logic_data_ ||
1047                         logic_data_->num_channels() != logic_channel_count) {
1048                         logic_data_.reset(new data::Logic(logic_channel_count));
1049                         assert(logic_data_);
1050                 }
1051         }
1052
1053         // Create signalbases if necessary
1054         for (auto channel : sr_dev->channels()) {
1055
1056                 // Try to find the channel in the list of existing signalbases
1057                 const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
1058                         [&](const shared_ptr<SignalBase> &sb) { return sb->channel() == channel; });
1059
1060                 // Not found, let's make a signalbase for it
1061                 if (iter == signalbases_.cend()) {
1062                         shared_ptr<SignalBase> signalbase;
1063                         switch(channel->type()->id()) {
1064                         case SR_CHANNEL_LOGIC:
1065                                 signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::LogicChannel);
1066                                 signalbases_.push_back(signalbase);
1067
1068                                 all_signal_data_.insert(logic_data_);
1069                                 signalbase->set_data(logic_data_);
1070
1071                                 connect(this, SIGNAL(capture_state_changed(int)),
1072                                         signalbase.get(), SLOT(on_capture_state_changed(int)));
1073                                 break;
1074
1075                         case SR_CHANNEL_ANALOG:
1076                                 signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::AnalogChannel);
1077                                 signalbases_.push_back(signalbase);
1078
1079                                 shared_ptr<data::Analog> data(new data::Analog());
1080                                 all_signal_data_.insert(data);
1081                                 signalbase->set_data(data);
1082
1083                                 connect(this, SIGNAL(capture_state_changed(int)),
1084                                         signalbase.get(), SLOT(on_capture_state_changed(int)));
1085                                 break;
1086                         }
1087                 }
1088         }
1089
1090         // Create and assign default signal groups if needed
1091         if (signal_groups_.empty()) {
1092                 for (auto& entry : sr_dev->channel_groups()) {
1093                         const shared_ptr<sigrok::ChannelGroup>& group = entry.second;
1094
1095                         if (group->channels().size() <= 1)
1096                                 continue;
1097
1098                         SignalGroup* sg = new SignalGroup(QString::fromStdString(entry.first));
1099                         for (const shared_ptr<sigrok::Channel>& channel : group->channels()) {
1100                                 for (shared_ptr<data::SignalBase> s : signalbases_) {
1101                                         if (s->channel() == channel) {
1102                                                 sg->append_signal(s);
1103                                                 break;
1104                                         }
1105                                 }
1106                         }
1107                         signal_groups_.emplace_back(sg);
1108                 }
1109         }
1110
1111         // Update all views
1112         for (shared_ptr<views::ViewBase>& viewbase : views_) {
1113                 vector< shared_ptr<SignalBase> > view_signalbases =
1114                                 viewbase->signalbases();
1115
1116                 // Add all non-decode signalbases that don't yet exist in the view
1117                 for (shared_ptr<SignalBase>& session_sb : signalbases_) {
1118                         if (session_sb->type() == SignalBase::DecodeChannel)
1119                                 continue;
1120
1121                         const auto iter = find_if(view_signalbases.cbegin(), view_signalbases.cend(),
1122                                 [&](const shared_ptr<SignalBase> &sb) { return sb == session_sb; });
1123
1124                         if (iter == view_signalbases.cend())
1125                                 viewbase->add_signalbase(session_sb);
1126                 }
1127
1128                 // Remove all non-decode signalbases that no longer exist
1129                 for (shared_ptr<SignalBase>& view_sb : view_signalbases) {
1130                         if (view_sb->type() == SignalBase::DecodeChannel)
1131                                 continue;
1132
1133                         const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
1134                                 [&](const shared_ptr<SignalBase> &sb) { return sb == view_sb; });
1135
1136                         if (iter == signalbases_.cend())
1137                                 viewbase->remove_signalbase(view_sb);
1138                 }
1139         }
1140
1141         signals_changed();
1142 }
1143
1144 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
1145         shared_ptr<sigrok::Channel> channel) const
1146 {
1147         for (shared_ptr<data::SignalBase> sig : signalbases_) {
1148                 assert(sig);
1149                 if (sig->channel() == channel)
1150                         return sig;
1151         }
1152         return shared_ptr<data::SignalBase>();
1153 }
1154
1155 void Session::sample_thread_proc(function<void (const QString)> error_handler)
1156 {
1157         assert(error_handler);
1158
1159 #ifdef ENABLE_FLOW
1160         pipeline_ = Pipeline::create();
1161
1162         source_ = ElementFactory::create_element("filesrc", "source");
1163         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
1164
1165         pipeline_->add(source_)->add(sink_);
1166         source_->link(sink_);
1167
1168         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1169
1170         sink_->set_property("emit-signals", TRUE);
1171         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1172
1173         // Get the bus from the pipeline and add a bus watch to the default main context
1174         RefPtr<Bus> bus = pipeline_->get_bus();
1175         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1176
1177         // Start pipeline and Wait until it finished processing
1178         pipeline_done_interrupt_ = false;
1179         pipeline_->set_state(Gst::STATE_PLAYING);
1180
1181         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1182         pipeline_done_cond_.wait(pipeline_done_lock_);
1183
1184         // Let the pipeline free all resources
1185         pipeline_->set_state(Gst::STATE_NULL);
1186
1187 #else
1188         if (!device_)
1189                 return;
1190
1191         try {
1192                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1193         } catch (Error& e) {
1194                 cur_samplerate_ = 0;
1195         }
1196
1197         out_of_memory_ = false;
1198
1199         {
1200                 lock_guard<recursive_mutex> lock(data_mutex_);
1201                 cur_logic_segment_.reset();
1202                 cur_analog_segments_.clear();
1203                 for (shared_ptr<data::SignalBase> sb : signalbases_)
1204                         sb->clear_sample_data();
1205         }
1206         highest_segment_id_ = -1;
1207         frame_began_ = false;
1208
1209         try {
1210                 device_->start();
1211         } catch (Error& e) {
1212                 error_handler(e.what());
1213                 return;
1214         }
1215
1216         set_capture_state(device_->session()->trigger() ?
1217                 AwaitingTrigger : Running);
1218
1219         try {
1220                 device_->run();
1221         } catch (Error& e) {
1222                 error_handler(e.what());
1223                 set_capture_state(Stopped);
1224                 return;
1225         } catch (QString& e) {
1226                 error_handler(e);
1227                 set_capture_state(Stopped);
1228                 return;
1229         }
1230
1231         set_capture_state(Stopped);
1232
1233         // Confirm that SR_DF_END was received
1234         if (cur_logic_segment_)
1235                 qDebug() << "WARNING: SR_DF_END was not received.";
1236 #endif
1237
1238         // Optimize memory usage
1239         free_unused_memory();
1240
1241         // We now have unsaved data unless we just "captured" from a file
1242         shared_ptr<devices::File> file_device =
1243                 dynamic_pointer_cast<devices::File>(device_);
1244
1245         if (!file_device)
1246                 data_saved_ = false;
1247
1248         if (out_of_memory_)
1249                 error_handler(tr("Out of memory, acquisition stopped."));
1250 }
1251
1252 void Session::free_unused_memory()
1253 {
1254         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1255                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1256
1257                 for (const shared_ptr<data::Segment>& segment : segments)
1258                         segment->free_unused_memory();
1259         }
1260 }
1261
1262 void Session::signal_new_segment()
1263 {
1264         int new_segment_id = 0;
1265
1266         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1267
1268                 // Determine new frame/segment number, assuming that all
1269                 // signals have the same number of frames/segments
1270                 if (cur_logic_segment_) {
1271                         new_segment_id = logic_data_->get_segment_count() - 1;
1272                 } else {
1273                         shared_ptr<sigrok::Channel> any_channel =
1274                                 (*cur_analog_segments_.begin()).first;
1275
1276                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1277                         assert(base);
1278
1279                         shared_ptr<data::Analog> data(base->analog_data());
1280                         assert(data);
1281
1282                         new_segment_id = data->get_segment_count() - 1;
1283                 }
1284         }
1285
1286         if (new_segment_id > highest_segment_id_) {
1287                 highest_segment_id_ = new_segment_id;
1288                 new_segment(highest_segment_id_);
1289         }
1290 }
1291
1292 void Session::signal_segment_completed()
1293 {
1294         int segment_id = 0;
1295
1296         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1297                 // We only care about analog and logic channels, not derived ones
1298                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1299                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1300                         break;
1301                 }
1302
1303                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1304                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1305                         break;
1306                 }
1307         }
1308
1309         if (segment_id >= 0)
1310                 segment_completed(segment_id);
1311 }
1312
1313 #ifdef ENABLE_FLOW
1314 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1315 {
1316         (void)bus;
1317
1318         if ((message->get_source() == pipeline_) && \
1319                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1320                 pipeline_done_cond_.notify_one();
1321
1322         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1323
1324         return true;
1325 }
1326
1327 Gst::FlowReturn Session::on_gst_new_sample()
1328 {
1329         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1330         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1331
1332         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1333                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1334                 Gst::MapInfo mapinfo;
1335                 buf_mem->map(mapinfo, Gst::MAP_READ);
1336
1337                 shared_ptr<sigrok::Packet> logic_packet =
1338                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1339
1340                 try {
1341                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1342                 } catch (bad_alloc&) {
1343                         out_of_memory_ = true;
1344                         device_->stop();
1345                         buf_mem->unmap(mapinfo);
1346                         return Gst::FLOW_ERROR;
1347                 }
1348
1349                 buf_mem->unmap(mapinfo);
1350         }
1351
1352         return Gst::FLOW_OK;
1353 }
1354 #endif
1355
1356 void Session::feed_in_header()
1357 {
1358         // Nothing to do here for now
1359 }
1360
1361 void Session::feed_in_meta(shared_ptr<Meta> meta)
1362 {
1363         for (auto& entry : meta->config()) {
1364                 switch (entry.first->id()) {
1365                 case SR_CONF_SAMPLERATE:
1366                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1367                         break;
1368                 default:
1369                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1370                         break;
1371                 }
1372         }
1373
1374         signals_changed();
1375 }
1376
1377 void Session::feed_in_trigger()
1378 {
1379         // The channel containing most samples should be most accurate
1380         uint64_t sample_count = 0;
1381
1382         {
1383                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1384                         assert(d);
1385                         uint64_t temp_count = 0;
1386
1387                         const vector< shared_ptr<pv::data::Segment> > segments =
1388                                 d->segments();
1389                         for (const shared_ptr<pv::data::Segment> &s : segments)
1390                                 temp_count += s->get_sample_count();
1391
1392                         if (temp_count > sample_count)
1393                                 sample_count = temp_count;
1394                 }
1395         }
1396
1397         uint32_t segment_id = 0;  // Default segment when no frames are used
1398
1399         // If a frame began, we'd ideally be able to use the highest segment ID for
1400         // the trigger. However, as new segments are only created when logic or
1401         // analog data comes in, this doesn't work if the trigger appears right
1402         // after the beginning of the frame, before any sample data.
1403         // For this reason, we use highest segment ID + 1 if no sample data came in
1404         // yet and the highest segment ID otherwise.
1405         if (frame_began_) {
1406                 segment_id = highest_segment_id_;
1407                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1408                         segment_id++;
1409         }
1410
1411         // TODO Create timestamp from segment start time + segment's current sample count
1412         util::Timestamp timestamp = sample_count / get_samplerate();
1413         trigger_list_.emplace_back(segment_id, timestamp);
1414         trigger_event(segment_id, timestamp);
1415 }
1416
1417 void Session::feed_in_frame_begin()
1418 {
1419         frame_began_ = true;
1420 }
1421
1422 void Session::feed_in_frame_end()
1423 {
1424         if (!frame_began_)
1425                 return;
1426
1427         {
1428                 lock_guard<recursive_mutex> lock(data_mutex_);
1429
1430                 if (cur_logic_segment_)
1431                         cur_logic_segment_->set_complete();
1432
1433                 for (auto& entry : cur_analog_segments_) {
1434                         shared_ptr<data::AnalogSegment> segment = entry.second;
1435                         segment->set_complete();
1436                 }
1437
1438                 cur_logic_segment_.reset();
1439                 cur_analog_segments_.clear();
1440         }
1441
1442         frame_began_ = false;
1443
1444         signal_segment_completed();
1445 }
1446
1447 void Session::feed_in_logic(shared_ptr<sigrok::Logic> logic)
1448 {
1449         if (logic->data_length() == 0) {
1450                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1451                 return;
1452         }
1453
1454         if (logic->unit_size() > 8)
1455                 throw QString(tr("Can't handle more than 64 logic channels."));
1456
1457         if (!cur_samplerate_)
1458                 try {
1459                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1460                 } catch (Error& e) {
1461                         // Do nothing
1462                 }
1463
1464         lock_guard<recursive_mutex> lock(data_mutex_);
1465
1466         if (!logic_data_) {
1467                 // The only reason logic_data_ would not have been created is
1468                 // if it was not possible to determine the signals when the
1469                 // device was created.
1470                 update_signals();
1471         }
1472
1473         if (!cur_logic_segment_) {
1474                 // This could be the first packet after a trigger
1475                 set_capture_state(Running);
1476
1477                 // Create a new data segment
1478                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1479                         *logic_data_, logic_data_->get_segment_count(),
1480                         logic->unit_size(), cur_samplerate_);
1481                 logic_data_->push_segment(cur_logic_segment_);
1482
1483                 signal_new_segment();
1484         }
1485
1486         cur_logic_segment_->append_payload(logic);
1487
1488         data_received();
1489 }
1490
1491 void Session::feed_in_analog(shared_ptr<sigrok::Analog> analog)
1492 {
1493         if (analog->num_samples() == 0) {
1494                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1495                 return;
1496         }
1497
1498         if (!cur_samplerate_)
1499                 try {
1500                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1501                 } catch (Error& e) {
1502                         // Do nothing
1503                 }
1504
1505         lock_guard<recursive_mutex> lock(data_mutex_);
1506
1507         const vector<shared_ptr<Channel>> channels = analog->channels();
1508         bool sweep_beginning = false;
1509
1510         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1511         analog->get_data_as_float(data.get());
1512
1513         if (signalbases_.empty())
1514                 update_signals();
1515
1516         float *channel_data = data.get();
1517         for (auto& channel : channels) {
1518                 shared_ptr<data::AnalogSegment> segment;
1519
1520                 // Try to get the segment of the channel
1521                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1522                         iterator iter = cur_analog_segments_.find(channel);
1523                 if (iter != cur_analog_segments_.end())
1524                         segment = (*iter).second;
1525                 else {
1526                         // If no segment was found, this means we haven't
1527                         // created one yet. i.e. this is the first packet
1528                         // in the sweep containing this segment.
1529                         sweep_beginning = true;
1530
1531                         // Find the analog data associated with the channel
1532                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1533                         assert(base);
1534
1535                         shared_ptr<data::Analog> data(base->analog_data());
1536                         assert(data);
1537
1538                         // Create a segment, keep it in the maps of channels
1539                         segment = make_shared<data::AnalogSegment>(
1540                                 *data, data->get_segment_count(), cur_samplerate_);
1541                         cur_analog_segments_[channel] = segment;
1542
1543                         // Push the segment into the analog data.
1544                         data->push_segment(segment);
1545
1546                         signal_new_segment();
1547                 }
1548
1549                 assert(segment);
1550
1551                 // Append the samples in the segment
1552                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1553                         channels.size());
1554         }
1555
1556         if (sweep_beginning) {
1557                 // This could be the first packet after a trigger
1558                 set_capture_state(Running);
1559         }
1560
1561         data_received();
1562 }
1563
1564 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1565         shared_ptr<Packet> packet)
1566 {
1567         (void)device;
1568
1569         assert(device);
1570         assert(device == device_->device());
1571         assert(packet);
1572
1573         switch (packet->type()->id()) {
1574         case SR_DF_HEADER:
1575                 feed_in_header();
1576                 break;
1577
1578         case SR_DF_META:
1579                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1580                 break;
1581
1582         case SR_DF_TRIGGER:
1583                 feed_in_trigger();
1584                 break;
1585
1586         case SR_DF_LOGIC:
1587                 try {
1588                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1589                 } catch (bad_alloc&) {
1590                         out_of_memory_ = true;
1591                         device_->stop();
1592                 }
1593                 break;
1594
1595         case SR_DF_ANALOG:
1596                 try {
1597                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1598                 } catch (bad_alloc&) {
1599                         out_of_memory_ = true;
1600                         device_->stop();
1601                 }
1602                 break;
1603
1604         case SR_DF_FRAME_BEGIN:
1605                 feed_in_frame_begin();
1606                 break;
1607
1608         case SR_DF_FRAME_END:
1609                 feed_in_frame_end();
1610                 break;
1611
1612         case SR_DF_END:
1613                 // Strictly speaking, this is performed when a frame end marker was
1614                 // received, so there's no point doing this again. However, not all
1615                 // devices use frames, and for those devices, we need to do it here.
1616                 {
1617                         lock_guard<recursive_mutex> lock(data_mutex_);
1618
1619                         if (cur_logic_segment_)
1620                                 cur_logic_segment_->set_complete();
1621
1622                         for (auto& entry : cur_analog_segments_) {
1623                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1624                                 segment->set_complete();
1625                         }
1626
1627                         cur_logic_segment_.reset();
1628                         cur_analog_segments_.clear();
1629                 }
1630                 break;
1631
1632         default:
1633                 break;
1634         }
1635 }
1636
1637 void Session::on_data_saved()
1638 {
1639         data_saved_ = true;
1640 }
1641
1642 #ifdef ENABLE_DECODE
1643 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1644 {
1645         assert(decoders.size() > 0);
1646
1647         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1648
1649         if (signal)
1650                 for (unsigned int i = 0; i < decoders.size(); i++) {
1651                         const srd_decoder* d = decoders[i];
1652                         signal->stack_decoder(d, !(i < decoders.size() - 1));
1653                 }
1654 }
1655 #endif
1656
1657 } // namespace pv