pv/session.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <QDebug>
  21 #include <QFileInfo>
  22
  23 #include <cassert>
  24 #include <memory>
  25 #include <mutex>
  26 #include <stdexcept>
  27
  28 #include <sys/stat.h>
  29
  30 #include "devicemanager.hpp"
  31 #include "mainwindow.hpp"
  32 #include "session.hpp"
  33
  34 #include "data/analog.hpp"
  35 #include "data/analogsegment.hpp"
  36 #include "data/decode/decoder.hpp"
  37 #include "data/logic.hpp"
  38 #include "data/logicsegment.hpp"
  39 #include "data/signalbase.hpp"
  40
  41 #include "devices/hardwaredevice.hpp"
  42 #include "devices/inputfile.hpp"
  43 #include "devices/sessionfile.hpp"
  44
  45 #include "toolbars/mainbar.hpp"
  46
  47 #include "views/trace/analogsignal.hpp"
  48 #include "views/trace/decodetrace.hpp"
  49 #include "views/trace/logicsignal.hpp"
  50 #include "views/trace/signal.hpp"
  51 #include "views/trace/view.hpp"
  52
  53 #include <libsigrokcxx/libsigrokcxx.hpp>
  54
  55 #ifdef ENABLE_FLOW
  56 #include <gstreamermm.h>
  57 #include <libsigrokflow/libsigrokflow.hpp>
  58 #endif
  59
  60 #ifdef ENABLE_DECODE
  61 #include <libsigrokdecode/libsigrokdecode.h>
  62 #include "data/decodesignal.hpp"
  63 #endif
  64
  65 using std::bad_alloc;
  66 using std::dynamic_pointer_cast;
  67 using std::find_if;
  68 using std::function;
  69 using std::lock_guard;
  70 using std::list;
  71 using std::make_pair;
  72 using std::make_shared;
  73 using std::map;
  74 using std::max;
  75 using std::move;
  76 using std::mutex;
  77 using std::pair;
  78 using std::recursive_mutex;
  79 using std::runtime_error;
  80 using std::shared_ptr;
  81 using std::string;
  82 #ifdef ENABLE_FLOW
  83 using std::unique_lock;
  84 #endif
  85 using std::unique_ptr;
  86 using std::unordered_set;
  87 using std::vector;
  88
  89 using sigrok::Analog;
  90 using sigrok::Channel;
  91 using sigrok::ConfigKey;
  92 using sigrok::DatafeedCallbackFunction;
  93 using sigrok::Error;
  94 using sigrok::InputFormat;
  95 using sigrok::Logic;
  96 using sigrok::Meta;
  97 using sigrok::Packet;
  98 using sigrok::Session;
  99
 100 using Glib::VariantBase;
 101
 102 #ifdef ENABLE_FLOW
 103 using Gst::Bus;
 104 using Gst::ElementFactory;
 105 using Gst::Pipeline;
 106 #endif
 107
 108 namespace pv {
 109
 110 shared_ptr<sigrok::Context> Session::sr_context;
 111
 112 Session::Session(DeviceManager &device_manager, QString name) :
 113         device_manager_(device_manager),
 114         default_name_(name),
 115         name_(name),
 116         capture_state_(Stopped),
 117         cur_samplerate_(0),
 118         data_saved_(true)
 119 {
 120 }
 121
 122 Session::~Session()
 123 {
 124         // Stop and join to the thread
 125         stop_capture();
 126 }
 127
 128 DeviceManager& Session::device_manager()
 129 {
 130         return device_manager_;
 131 }
 132
 133 const DeviceManager& Session::device_manager() const
 134 {
 135         return device_manager_;
 136 }
 137
 138 shared_ptr<sigrok::Session> Session::session() const
 139 {
 140         if (!device_)
 141                 return shared_ptr<sigrok::Session>();
 142         return device_->session();
 143 }
 144
 145 shared_ptr<devices::Device> Session::device() const
 146 {
 147         return device_;
 148 }
 149
 150 QString Session::name() const
 151 {
 152         return name_;
 153 }
 154
 155 void Session::set_name(QString name)
 156 {
 157         if (default_name_.isEmpty())
 158                 default_name_ = name;
 159
 160         name_ = name;
 161
 162         name_changed();
 163 }
 164
 165 const list< shared_ptr<views::ViewBase> > Session::views() const
 166 {
 167         return views_;
 168 }
 169
 170 shared_ptr<views::ViewBase> Session::main_view() const
 171 {
 172         return main_view_;
 173 }
 174
 175 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 176 {
 177         main_bar_ = main_bar;
 178 }
 179
 180 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 181 {
 182         return main_bar_;
 183 }
 184
 185 bool Session::data_saved() const
 186 {
 187         return data_saved_;
 188 }
 189
 190 void Session::save_setup(QSettings &settings) const
 191 {
 192         int decode_signals = 0, views = 0;
 193
 194         // Save channels and decoders
 195         for (const shared_ptr<data::SignalBase>& base : signalbases_) {
 196 #ifdef ENABLE_DECODE
 197                 if (base->is_decode_signal()) {
 198                         settings.beginGroup("decode_signal" + QString::number(decode_signals++));
 199                         base->save_settings(settings);
 200                         settings.endGroup();
 201                 } else
 202 #endif
 203                 {
 204                         settings.beginGroup(base->internal_name());
 205                         base->save_settings(settings);
 206                         settings.endGroup();
 207                 }
 208         }
 209
 210         settings.setValue("decode_signals", decode_signals);
 211
 212         // Save view states and their signal settings
 213         // Note: main_view must be saved as view0
 214         settings.beginGroup("view" + QString::number(views++));
 215         main_view_->save_settings(settings);
 216         settings.endGroup();
 217
 218         for (const shared_ptr<views::ViewBase>& view : views_) {
 219                 if (view != main_view_) {
 220                         settings.beginGroup("view" + QString::number(views++));
 221                         view->save_settings(settings);
 222                         settings.endGroup();
 223                 }
 224         }
 225
 226         settings.setValue("views", views);
 227 }
 228
 229 void Session::save_settings(QSettings &settings) const
 230 {
 231         map<string, string> dev_info;
 232         list<string> key_list;
 233
 234         if (device_) {
 235                 shared_ptr<devices::HardwareDevice> hw_device =
 236                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 237
 238                 if (hw_device) {
 239                         settings.setValue("device_type", "hardware");
 240                         settings.beginGroup("device");
 241
 242                         key_list.emplace_back("vendor");
 243                         key_list.emplace_back("model");
 244                         key_list.emplace_back("version");
 245                         key_list.emplace_back("serial_num");
 246                         key_list.emplace_back("connection_id");
 247
 248                         dev_info = device_manager_.get_device_info(device_);
 249
 250                         for (string& key : key_list) {
 251                                 if (dev_info.count(key))
 252                                         settings.setValue(QString::fromUtf8(key.c_str()),
 253                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 254                                 else
 255                                         settings.remove(QString::fromUtf8(key.c_str()));
 256                         }
 257
 258                         settings.endGroup();
 259                 }
 260
 261                 shared_ptr<devices::SessionFile> sessionfile_device =
 262                         dynamic_pointer_cast<devices::SessionFile>(device_);
 263
 264                 if (sessionfile_device) {
 265                         settings.setValue("device_type", "sessionfile");
 266                         settings.beginGroup("device");
 267                         settings.setValue("filename", QString::fromStdString(
 268                                 sessionfile_device->full_name()));
 269                         settings.endGroup();
 270                 }
 271
 272                 shared_ptr<devices::InputFile> inputfile_device =
 273                         dynamic_pointer_cast<devices::InputFile>(device_);
 274
 275                 if (inputfile_device) {
 276                         settings.setValue("device_type", "inputfile");
 277                         settings.beginGroup("device");
 278                         inputfile_device->save_meta_to_settings(settings);
 279                         settings.endGroup();
 280                 }
 281
 282                 save_setup(settings);
 283         }
 284 }
 285
 286 void Session::restore_setup(QSettings &settings)
 287 {
 288         // Restore channels
 289         for (shared_ptr<data::SignalBase> base : signalbases_) {
 290                 settings.beginGroup(base->internal_name());
 291                 base->restore_settings(settings);
 292                 settings.endGroup();
 293         }
 294
 295         // Restore decoders
 296 #ifdef ENABLE_DECODE
 297         int decode_signals = settings.value("decode_signals").toInt();
 298
 299         for (int i = 0; i < decode_signals; i++) {
 300                 settings.beginGroup("decode_signal" + QString::number(i));
 301                 shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 302                 signal->restore_settings(settings);
 303                 settings.endGroup();
 304         }
 305 #endif
 306
 307         // Restore views
 308         int views = settings.value("views").toInt();
 309
 310         for (int i = 0; i < views; i++) {
 311                 settings.beginGroup("view" + QString::number(i));
 312
 313                 if (i > 0) {
 314                         views::ViewType type = (views::ViewType)settings.value("type").toInt();
 315                         add_view(name_, type, this);
 316                         views_.back()->restore_settings(settings);
 317                 } else
 318                         main_view_->restore_settings(settings);
 319
 320                 settings.endGroup();
 321         }
 322 }
 323
 324 void Session::restore_settings(QSettings &settings)
 325 {
 326         shared_ptr<devices::Device> device;
 327
 328         QString device_type = settings.value("device_type").toString();
 329
 330         if (device_type == "hardware") {
 331                 map<string, string> dev_info;
 332                 list<string> key_list;
 333
 334                 // Re-select last used device if possible but only if it's not demo
 335                 settings.beginGroup("device");
 336                 key_list.emplace_back("vendor");
 337                 key_list.emplace_back("model");
 338                 key_list.emplace_back("version");
 339                 key_list.emplace_back("serial_num");
 340                 key_list.emplace_back("connection_id");
 341
 342                 for (string key : key_list) {
 343                         const QString k = QString::fromStdString(key);
 344                         if (!settings.contains(k))
 345                                 continue;
 346
 347                         const string value = settings.value(k).toString().toStdString();
 348                         if (!value.empty())
 349                                 dev_info.insert(make_pair(key, value));
 350                 }
 351
 352                 if (dev_info.count("model") > 0)
 353                         device = device_manager_.find_device_from_info(dev_info);
 354
 355                 if (device)
 356                         set_device(device);
 357
 358                 settings.endGroup();
 359         }
 360
 361         if ((device_type == "sessionfile") || (device_type == "inputfile")) {
 362                 if (device_type == "sessionfile") {
 363                         settings.beginGroup("device");
 364                         QString filename = settings.value("filename").toString();
 365                         settings.endGroup();
 366
 367                         if (QFileInfo(filename).isReadable()) {
 368                                 device = make_shared<devices::SessionFile>(device_manager_.context(),
 369                                         filename.toStdString());
 370                         }
 371                 }
 372
 373                 if (device_type == "inputfile") {
 374                         settings.beginGroup("device");
 375                         device = make_shared<devices::InputFile>(device_manager_.context(),
 376                                 settings);
 377                         settings.endGroup();
 378                 }
 379
 380                 if (device) {
 381                         set_device(device);
 382
 383                         start_capture([](QString infoMessage) {
 384                                 // TODO Emulate noquote()
 385                                 qDebug() << "Session error:" << infoMessage; });
 386
 387                         set_name(QString::fromStdString(
 388                                 dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 389                 }
 390         }
 391
 392         if (device)
 393                 restore_setup(settings);
 394 }
 395
 396 void Session::select_device(shared_ptr<devices::Device> device)
 397 {
 398         try {
 399                 if (device)
 400                         set_device(device);
 401                 else
 402                         set_default_device();
 403         } catch (const QString &e) {
 404                 MainWindow::show_session_error(tr("Failed to select device"), e);
 405         }
 406 }
 407
 408 void Session::set_device(shared_ptr<devices::Device> device)
 409 {
 410         assert(device);
 411
 412         // Ensure we are not capturing before setting the device
 413         stop_capture();
 414
 415         if (device_)
 416                 device_->close();
 417
 418         device_.reset();
 419
 420         // Revert name back to default name (e.g. "Session 1") as the data is gone
 421         name_ = default_name_;
 422         name_changed();
 423
 424         // Remove all stored data and reset all views
 425         for (shared_ptr<views::ViewBase> view : views_) {
 426                 view->clear_signals();
 427 #ifdef ENABLE_DECODE
 428                 view->clear_decode_signals();
 429 #endif
 430                 view->reset_view_state();
 431         }
 432         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 433                 d->clear();
 434         all_signal_data_.clear();
 435         signalbases_.clear();
 436         cur_logic_segment_.reset();
 437
 438         for (auto& entry : cur_analog_segments_) {
 439                 shared_ptr<sigrok::Channel>(entry.first).reset();
 440                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 441         }
 442
 443         logic_data_.reset();
 444
 445         signals_changed();
 446
 447         device_ = move(device);
 448
 449         try {
 450                 device_->open();
 451         } catch (const QString &e) {
 452                 device_.reset();
 453                 MainWindow::show_session_error(tr("Failed to open device"), e);
 454         }
 455
 456         if (device_) {
 457                 device_->session()->add_datafeed_callback([=]
 458                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 459                                 data_feed_in(device, packet);
 460                         });
 461
 462                 update_signals();
 463         }
 464
 465         device_changed();
 466 }
 467
 468 void Session::set_default_device()
 469 {
 470         const list< shared_ptr<devices::HardwareDevice> > &devices =
 471                 device_manager_.devices();
 472
 473         if (devices.empty())
 474                 return;
 475
 476         // Try and find the demo device and select that by default
 477         const auto iter = find_if(devices.begin(), devices.end(),
 478                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 479                         return d->hardware_device()->driver()->name() == "demo"; });
 480         set_device((iter == devices.end()) ? devices.front() : *iter);
 481 }
 482
 483 /**
 484  * Convert generic options to data types that are specific to InputFormat.
 485  *
 486  * @param[in] user_spec Vector of tokenized words, string format.
 487  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 488  *
 489  * @return Map of options suitable for InputFormat::create_input().
 490  */
 491 map<string, Glib::VariantBase>
 492 Session::input_format_options(vector<string> user_spec,
 493                 map<string, shared_ptr<Option>> fmt_opts)
 494 {
 495         map<string, Glib::VariantBase> result;
 496
 497         for (auto& entry : user_spec) {
 498                 /*
 499                  * Split key=value specs. Accept entries without separator
 500                  * (for simplified boolean specifications).
 501                  */
 502                 string key, val;
 503                 size_t pos = entry.find("=");
 504                 if (pos == std::string::npos) {
 505                         key = entry;
 506                         val = "";
 507                 } else {
 508                         key = entry.substr(0, pos);
 509                         val = entry.substr(pos + 1);
 510                 }
 511
 512                 /*
 513                  * Skip user specifications that are not a member of the
 514                  * format's set of supported options. Have the text input
 515                  * spec converted to the required input format specific
 516                  * data type.
 517                  */
 518                 auto found = fmt_opts.find(key);
 519                 if (found == fmt_opts.end())
 520                         continue;
 521                 shared_ptr<Option> opt = found->second;
 522                 result[key] = opt->parse_string(val);
 523         }
 524
 525         return result;
 526 }
 527
 528 void Session::load_init_file(const string &file_name,
 529         const string &format, const string &setup_file_name)
 530 {
 531         shared_ptr<InputFormat> input_format;
 532         map<string, Glib::VariantBase> input_opts;
 533
 534         if (!format.empty()) {
 535                 const map<string, shared_ptr<InputFormat> > formats =
 536                         device_manager_.context()->input_formats();
 537                 auto user_opts = pv::util::split_string(format, ":");
 538                 string user_name = user_opts.front();
 539                 user_opts.erase(user_opts.begin());
 540                 const auto iter = find_if(formats.begin(), formats.end(),
 541                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 542                                 return f.first == user_name; });
 543                 if (iter == formats.end()) {
 544                         MainWindow::show_session_error(tr("Error"),
 545                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 546                         return;
 547                 }
 548                 input_format = (*iter).second;
 549                 input_opts = input_format_options(user_opts,
 550                         input_format->options());
 551         }
 552
 553         load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
 554                 input_format, input_opts);
 555 }
 556
 557 void Session::load_file(QString file_name, QString setup_file_name,
 558         shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 559 {
 560         const QString errorMessage(
 561                 QString("Failed to load file %1").arg(file_name));
 562
 563         // In the absence of a caller's format spec, try to auto detect.
 564         // Assume "sigrok session file" upon lookup miss.
 565         if (!format)
 566                 format = device_manager_.context()->input_format_match(file_name.toStdString());
 567         try {
 568                 if (format)
 569                         set_device(shared_ptr<devices::Device>(
 570                                 new devices::InputFile(
 571                                         device_manager_.context(),
 572                                         file_name.toStdString(),
 573                                         format, options)));
 574                 else
 575                         set_device(shared_ptr<devices::Device>(
 576                                 new devices::SessionFile(
 577                                         device_manager_.context(),
 578                                         file_name.toStdString())));
 579         } catch (Error& e) {
 580                 MainWindow::show_session_error(tr("Failed to load ") + file_name, e.what());
 581                 set_default_device();
 582                 main_bar_->update_device_list();
 583                 return;
 584         }
 585
 586         // Use the input file with .pvs extension if no setup file was given
 587         if (setup_file_name.isEmpty()) {
 588                 setup_file_name = file_name;
 589                 setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
 590                 setup_file_name.append(".pvs");
 591         }
 592
 593         if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
 594                 QSettings settings_storage(setup_file_name, QSettings::IniFormat);
 595                 restore_setup(settings_storage);
 596         }
 597
 598         main_bar_->update_device_list();
 599
 600         start_capture([&, errorMessage](QString infoMessage) {
 601                 MainWindow::show_session_error(errorMessage, infoMessage); });
 602
 603         set_name(QFileInfo(file_name).fileName());
 604 }
 605
 606 Session::capture_state Session::get_capture_state() const
 607 {
 608         lock_guard<mutex> lock(sampling_mutex_);
 609         return capture_state_;
 610 }
 611
 612 void Session::start_capture(function<void (const QString)> error_handler)
 613 {
 614         if (!device_) {
 615                 error_handler(tr("No active device set, can't start acquisition."));
 616                 return;
 617         }
 618
 619         stop_capture();
 620
 621         // Check that at least one channel is enabled
 622         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 623         if (sr_dev) {
 624                 const auto channels = sr_dev->channels();
 625                 if (!any_of(channels.begin(), channels.end(),
 626                         [](shared_ptr<Channel> channel) {
 627                                 return channel->enabled(); })) {
 628                         error_handler(tr("No channels enabled."));
 629                         return;
 630                 }
 631         }
 632
 633         // Clear signal data
 634         for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 635                 d->clear();
 636
 637         trigger_list_.clear();
 638
 639         // Revert name back to default name (e.g. "Session 1") for real devices
 640         // as the (possibly saved) data is gone. File devices keep their name.
 641         shared_ptr<devices::HardwareDevice> hw_device =
 642                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 643
 644         if (hw_device) {
 645                 name_ = default_name_;
 646                 name_changed();
 647         }
 648
 649         // Begin the session
 650         sampling_thread_ = std::thread(
 651                 &Session::sample_thread_proc, this, error_handler);
 652 }
 653
 654 void Session::stop_capture()
 655 {
 656         if (get_capture_state() != Stopped)
 657                 device_->stop();
 658
 659         // Check that sampling stopped
 660         if (sampling_thread_.joinable())
 661                 sampling_thread_.join();
 662 }
 663
 664 void Session::register_view(shared_ptr<views::ViewBase> view)
 665 {
 666         if (views_.empty()) {
 667                 main_view_ = view;
 668         }
 669
 670         views_.push_back(view);
 671
 672         // Add all device signals
 673         update_signals();
 674
 675         // Add all other signals
 676         unordered_set< shared_ptr<data::SignalBase> > view_signalbases =
 677                 view->signalbases();
 678
 679         views::trace::View *trace_view =
 680                 qobject_cast<views::trace::View*>(view.get());
 681
 682         if (trace_view) {
 683                 for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
 684                         const int sb_exists = count_if(
 685                                 view_signalbases.cbegin(), view_signalbases.cend(),
 686                                 [&](const shared_ptr<data::SignalBase> &sb) {
 687                                         return sb == signalbase;
 688                                 });
 689                         // Add the signal to the view as it doesn't have it yet
 690                         if (!sb_exists)
 691                                 switch (signalbase->type()) {
 692                                 case data::SignalBase::AnalogChannel:
 693                                 case data::SignalBase::LogicChannel:
 694                                 case data::SignalBase::DecodeChannel:
 695 #ifdef ENABLE_DECODE
 696                                         trace_view->add_decode_signal(
 697                                                 dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 698 #endif
 699                                         break;
 700                                 case data::SignalBase::MathChannel:
 701                                         // TBD
 702                                         break;
 703                                 }
 704                 }
 705         }
 706
 707         signals_changed();
 708 }
 709
 710 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 711 {
 712         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 713
 714         if (views_.empty()) {
 715                 main_view_.reset();
 716
 717                 // Without a view there can be no main bar
 718                 main_bar_.reset();
 719         }
 720 }
 721
 722 bool Session::has_view(shared_ptr<views::ViewBase> view)
 723 {
 724         for (shared_ptr<views::ViewBase>& v : views_)
 725                 if (v == view)
 726                         return true;
 727
 728         return false;
 729 }
 730
 731 double Session::get_samplerate() const
 732 {
 733         double samplerate = 0.0;
 734
 735         for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 736                 assert(d);
 737                 const vector< shared_ptr<pv::data::Segment> > segments =
 738                         d->segments();
 739                 for (const shared_ptr<pv::data::Segment>& s : segments)
 740                         samplerate = max(samplerate, s->samplerate());
 741         }
 742         // If there is no sample rate given we use samples as unit
 743         if (samplerate == 0.0)
 744                 samplerate = 1.0;
 745
 746         return samplerate;
 747 }
 748
 749 uint32_t Session::get_segment_count() const
 750 {
 751         uint32_t value = 0;
 752
 753         // Find the highest number of segments
 754         for (const shared_ptr<data::SignalData>& data : all_signal_data_)
 755                 if (data->get_segment_count() > value)
 756                         value = data->get_segment_count();
 757
 758         return value;
 759 }
 760
 761 vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
 762 {
 763         vector<util::Timestamp> result;
 764
 765         for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
 766                 if (entry.first == segment_id)
 767                         result.push_back(entry.second);
 768
 769         return result;
 770 }
 771
 772 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 773 {
 774         return signalbases_;
 775 }
 776
 777 bool Session::all_segments_complete(uint32_t segment_id) const
 778 {
 779         bool all_complete = true;
 780
 781         for (const shared_ptr<data::SignalBase>& base : signalbases_)
 782                 if (!base->segment_is_complete(segment_id))
 783                         all_complete = false;
 784
 785         return all_complete;
 786 }
 787
 788 #ifdef ENABLE_DECODE
 789 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 790 {
 791         shared_ptr<data::DecodeSignal> signal;
 792
 793         try {
 794                 // Create the decode signal
 795                 signal = make_shared<data::DecodeSignal>(*this);
 796
 797                 signalbases_.insert(signal);
 798
 799                 // Add the decode signal to all views
 800                 for (shared_ptr<views::ViewBase>& view : views_)
 801                         view->add_decode_signal(signal);
 802         } catch (runtime_error& e) {
 803                 remove_decode_signal(signal);
 804                 return nullptr;
 805         }
 806
 807         signals_changed();
 808
 809         return signal;
 810 }
 811
 812 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 813 {
 814         signalbases_.erase(signal);
 815
 816         for (shared_ptr<views::ViewBase>& view : views_)
 817                 view->remove_decode_signal(signal);
 818
 819         signals_changed();
 820 }
 821 #endif
 822
 823 void Session::set_capture_state(capture_state state)
 824 {
 825         bool changed;
 826
 827         if (state == Running)
 828                 acq_time_.start();
 829         if (state == Stopped)
 830                 qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
 831
 832         {
 833                 lock_guard<mutex> lock(sampling_mutex_);
 834                 changed = capture_state_ != state;
 835                 capture_state_ = state;
 836         }
 837
 838         if (changed)
 839                 capture_state_changed(state);
 840 }
 841
 842 void Session::update_signals()
 843 {
 844         if (!device_) {
 845                 signalbases_.clear();
 846                 logic_data_.reset();
 847                 for (shared_ptr<views::ViewBase>& view : views_) {
 848                         view->clear_signals();
 849 #ifdef ENABLE_DECODE
 850                         view->clear_decode_signals();
 851 #endif
 852                 }
 853                 return;
 854         }
 855
 856         lock_guard<recursive_mutex> lock(data_mutex_);
 857
 858         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 859         if (!sr_dev) {
 860                 signalbases_.clear();
 861                 logic_data_.reset();
 862                 for (shared_ptr<views::ViewBase>& view : views_) {
 863                         view->clear_signals();
 864 #ifdef ENABLE_DECODE
 865                         view->clear_decode_signals();
 866 #endif
 867                 }
 868                 return;
 869         }
 870
 871         // Detect what data types we will receive
 872         auto channels = sr_dev->channels();
 873         unsigned int logic_channel_count = count_if(
 874                 channels.begin(), channels.end(),
 875                 [] (shared_ptr<Channel> channel) {
 876                         return channel->type() == sigrok::ChannelType::LOGIC; });
 877
 878         // Create data containers for the logic data segments
 879         {
 880                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 881
 882                 if (logic_channel_count == 0) {
 883                         logic_data_.reset();
 884                 } else if (!logic_data_ ||
 885                         logic_data_->num_channels() != logic_channel_count) {
 886                         logic_data_.reset(new data::Logic(
 887                                 logic_channel_count));
 888                         assert(logic_data_);
 889                 }
 890         }
 891
 892         // Make the signals list
 893         for (shared_ptr<views::ViewBase>& viewbase : views_) {
 894                 views::trace::View *trace_view =
 895                         qobject_cast<views::trace::View*>(viewbase.get());
 896
 897                 if (trace_view) {
 898                         unordered_set< shared_ptr<views::trace::Signal> >
 899                                 prev_sigs(trace_view->signals());
 900                         trace_view->clear_signals();
 901
 902                         for (auto channel : sr_dev->channels()) {
 903                                 shared_ptr<data::SignalBase> signalbase;
 904                                 shared_ptr<views::trace::Signal> signal;
 905
 906                                 // Find the channel in the old signals
 907                                 const auto iter = find_if(
 908                                         prev_sigs.cbegin(), prev_sigs.cend(),
 909                                         [&](const shared_ptr<views::trace::Signal> &s) {
 910                                                 return s->base()->channel() == channel;
 911                                         });
 912                                 if (iter != prev_sigs.end()) {
 913                                         // Copy the signal from the old set to the new
 914                                         signal = *iter;
 915                                         trace_view->add_signal(signal);
 916                                 } else {
 917                                         // Find the signalbase for this channel if possible
 918                                         signalbase.reset();
 919                                         for (const shared_ptr<data::SignalBase>& b : signalbases_)
 920                                                 if (b->channel() == channel)
 921                                                         signalbase = b;
 922
 923                                         switch(channel->type()->id()) {
 924                                         case SR_CHANNEL_LOGIC:
 925                                                 if (!signalbase) {
 926                                                         signalbase = make_shared<data::SignalBase>(channel,
 927                                                                 data::SignalBase::LogicChannel);
 928                                                         signalbases_.insert(signalbase);
 929
 930                                                         all_signal_data_.insert(logic_data_);
 931                                                         signalbase->set_data(logic_data_);
 932
 933                                                         connect(this, SIGNAL(capture_state_changed(int)),
 934                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 935                                                 }
 936
 937                                                 signal = shared_ptr<views::trace::Signal>(
 938                                                         new views::trace::LogicSignal(*this,
 939                                                                 device_, signalbase));
 940                                                 trace_view->add_signal(signal);
 941                                                 break;
 942
 943                                         case SR_CHANNEL_ANALOG:
 944                                         {
 945                                                 if (!signalbase) {
 946                                                         signalbase = make_shared<data::SignalBase>(channel,
 947                                                                 data::SignalBase::AnalogChannel);
 948                                                         signalbases_.insert(signalbase);
 949
 950                                                         shared_ptr<data::Analog> data(new data::Analog());
 951                                                         all_signal_data_.insert(data);
 952                                                         signalbase->set_data(data);
 953
 954                                                         connect(this, SIGNAL(capture_state_changed(int)),
 955                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 956                                                 }
 957
 958                                                 signal = shared_ptr<views::trace::Signal>(
 959                                                         new views::trace::AnalogSignal(
 960                                                                 *this, signalbase));
 961                                                 trace_view->add_signal(signal);
 962                                                 break;
 963                                         }
 964
 965                                         default:
 966                                                 assert(false);
 967                                                 break;
 968                                         }
 969                                 }
 970                         }
 971                 }
 972         }
 973
 974         signals_changed();
 975 }
 976
 977 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 978         shared_ptr<sigrok::Channel> channel) const
 979 {
 980         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 981                 assert(sig);
 982                 if (sig->channel() == channel)
 983                         return sig;
 984         }
 985         return shared_ptr<data::SignalBase>();
 986 }
 987
 988 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 989 {
 990         assert(error_handler);
 991
 992 #ifdef ENABLE_FLOW
 993         pipeline_ = Pipeline::create();
 994
 995         source_ = ElementFactory::create_element("filesrc", "source");
 996         sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
 997
 998         pipeline_->add(source_)->add(sink_);
 999         source_->link(sink_);
1000
1001         source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
1002
1003         sink_->set_property("emit-signals", TRUE);
1004         sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
1005
1006         // Get the bus from the pipeline and add a bus watch to the default main context
1007         RefPtr<Bus> bus = pipeline_->get_bus();
1008         bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
1009
1010         // Start pipeline and Wait until it finished processing
1011         pipeline_done_interrupt_ = false;
1012         pipeline_->set_state(Gst::STATE_PLAYING);
1013
1014         unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
1015         pipeline_done_cond_.wait(pipeline_done_lock_);
1016
1017         // Let the pipeline free all resources
1018         pipeline_->set_state(Gst::STATE_NULL);
1019
1020 #else
1021         if (!device_)
1022                 return;
1023
1024         try {
1025                 cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1026         } catch (Error& e) {
1027                 cur_samplerate_ = 0;
1028         }
1029
1030         out_of_memory_ = false;
1031
1032         {
1033                 lock_guard<recursive_mutex> lock(data_mutex_);
1034                 cur_logic_segment_.reset();
1035                 cur_analog_segments_.clear();
1036         }
1037         highest_segment_id_ = -1;
1038         frame_began_ = false;
1039
1040         try {
1041                 device_->start();
1042         } catch (Error& e) {
1043                 error_handler(e.what());
1044                 return;
1045         }
1046
1047         set_capture_state(device_->session()->trigger() ?
1048                 AwaitingTrigger : Running);
1049
1050         try {
1051                 device_->run();
1052         } catch (Error& e) {
1053                 error_handler(e.what());
1054                 set_capture_state(Stopped);
1055                 return;
1056         } catch (QString& e) {
1057                 error_handler(e);
1058                 set_capture_state(Stopped);
1059                 return;
1060         }
1061
1062         set_capture_state(Stopped);
1063
1064         // Confirm that SR_DF_END was received
1065         if (cur_logic_segment_)
1066                 qDebug() << "WARNING: SR_DF_END was not received.";
1067 #endif
1068
1069         // Optimize memory usage
1070         free_unused_memory();
1071
1072         // We now have unsaved data unless we just "captured" from a file
1073         shared_ptr<devices::File> file_device =
1074                 dynamic_pointer_cast<devices::File>(device_);
1075
1076         if (!file_device)
1077                 data_saved_ = false;
1078
1079         if (out_of_memory_)
1080                 error_handler(tr("Out of memory, acquisition stopped."));
1081 }
1082
1083 void Session::free_unused_memory()
1084 {
1085         for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
1086                 const vector< shared_ptr<data::Segment> > segments = data->segments();
1087
1088                 for (const shared_ptr<data::Segment>& segment : segments)
1089                         segment->free_unused_memory();
1090         }
1091 }
1092
1093 void Session::signal_new_segment()
1094 {
1095         int new_segment_id = 0;
1096
1097         if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
1098
1099                 // Determine new frame/segment number, assuming that all
1100                 // signals have the same number of frames/segments
1101                 if (cur_logic_segment_) {
1102                         new_segment_id = logic_data_->get_segment_count() - 1;
1103                 } else {
1104                         shared_ptr<sigrok::Channel> any_channel =
1105                                 (*cur_analog_segments_.begin()).first;
1106
1107                         shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
1108                         assert(base);
1109
1110                         shared_ptr<data::Analog> data(base->analog_data());
1111                         assert(data);
1112
1113                         new_segment_id = data->get_segment_count() - 1;
1114                 }
1115         }
1116
1117         if (new_segment_id > highest_segment_id_) {
1118                 highest_segment_id_ = new_segment_id;
1119                 new_segment(highest_segment_id_);
1120         }
1121 }
1122
1123 void Session::signal_segment_completed()
1124 {
1125         int segment_id = 0;
1126
1127         for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
1128                 // We only care about analog and logic channels, not derived ones
1129                 if (signalbase->type() == data::SignalBase::AnalogChannel) {
1130                         segment_id = signalbase->analog_data()->get_segment_count() - 1;
1131                         break;
1132                 }
1133
1134                 if (signalbase->type() == data::SignalBase::LogicChannel) {
1135                         segment_id = signalbase->logic_data()->get_segment_count() - 1;
1136                         break;
1137                 }
1138         }
1139
1140         if (segment_id >= 0)
1141                 segment_completed(segment_id);
1142 }
1143
1144 #ifdef ENABLE_FLOW
1145 bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
1146 {
1147         (void)bus;
1148
1149         if ((message->get_source() == pipeline_) && \
1150                 ((message->get_message_type() == Gst::MESSAGE_EOS)))
1151                 pipeline_done_cond_.notify_one();
1152
1153         // TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
1154
1155         return true;
1156 }
1157
1158 Gst::FlowReturn Session::on_gst_new_sample()
1159 {
1160         RefPtr<Gst::Sample> sample = sink_->pull_sample();
1161         RefPtr<Gst::Buffer> buf = sample->get_buffer();
1162
1163         for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
1164                 RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
1165                 Gst::MapInfo mapinfo;
1166                 buf_mem->map(mapinfo, Gst::MAP_READ);
1167
1168                 shared_ptr<sigrok::Packet> logic_packet =
1169                         sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
1170
1171                 try {
1172                         feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
1173                 } catch (bad_alloc&) {
1174                         out_of_memory_ = true;
1175                         device_->stop();
1176                         buf_mem->unmap(mapinfo);
1177                         return Gst::FLOW_ERROR;
1178                 }
1179
1180                 buf_mem->unmap(mapinfo);
1181         }
1182
1183         return Gst::FLOW_OK;
1184 }
1185 #endif
1186
1187 void Session::feed_in_header()
1188 {
1189         // Nothing to do here for now
1190 }
1191
1192 void Session::feed_in_meta(shared_ptr<Meta> meta)
1193 {
1194         for (auto& entry : meta->config()) {
1195                 switch (entry.first->id()) {
1196                 case SR_CONF_SAMPLERATE:
1197                         cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
1198                         break;
1199                 default:
1200                         qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
1201                         break;
1202                 }
1203         }
1204
1205         signals_changed();
1206 }
1207
1208 void Session::feed_in_trigger()
1209 {
1210         // The channel containing most samples should be most accurate
1211         uint64_t sample_count = 0;
1212
1213         {
1214                 for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
1215                         assert(d);
1216                         uint64_t temp_count = 0;
1217
1218                         const vector< shared_ptr<pv::data::Segment> > segments =
1219                                 d->segments();
1220                         for (const shared_ptr<pv::data::Segment> &s : segments)
1221                                 temp_count += s->get_sample_count();
1222
1223                         if (temp_count > sample_count)
1224                                 sample_count = temp_count;
1225                 }
1226         }
1227
1228         uint32_t segment_id = 0;  // Default segment when no frames are used
1229
1230         // If a frame began, we'd ideally be able to use the highest segment ID for
1231         // the trigger. However, as new segments are only created when logic or
1232         // analog data comes in, this doesn't work if the trigger appears right
1233         // after the beginning of the frame, before any sample data.
1234         // For this reason, we use highest segment ID + 1 if no sample data came in
1235         // yet and the highest segment ID otherwise.
1236         if (frame_began_) {
1237                 segment_id = highest_segment_id_;
1238                 if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
1239                         segment_id++;
1240         }
1241
1242         // TODO Create timestamp from segment start time + segment's current sample count
1243         util::Timestamp timestamp = sample_count / get_samplerate();
1244         trigger_list_.emplace_back(segment_id, timestamp);
1245         trigger_event(segment_id, timestamp);
1246 }
1247
1248 void Session::feed_in_frame_begin()
1249 {
1250         frame_began_ = true;
1251 }
1252
1253 void Session::feed_in_frame_end()
1254 {
1255         if (!frame_began_)
1256                 return;
1257
1258         {
1259                 lock_guard<recursive_mutex> lock(data_mutex_);
1260
1261                 if (cur_logic_segment_)
1262                         cur_logic_segment_->set_complete();
1263
1264                 for (auto& entry : cur_analog_segments_) {
1265                         shared_ptr<data::AnalogSegment> segment = entry.second;
1266                         segment->set_complete();
1267                 }
1268
1269                 cur_logic_segment_.reset();
1270                 cur_analog_segments_.clear();
1271         }
1272
1273         frame_began_ = false;
1274
1275         signal_segment_completed();
1276 }
1277
1278 void Session::feed_in_logic(shared_ptr<Logic> logic)
1279 {
1280         if (logic->data_length() == 0) {
1281                 qDebug() << "WARNING: Received logic packet with 0 samples.";
1282                 return;
1283         }
1284
1285         if (logic->unit_size() > 8)
1286                 throw QString(tr("Can't handle more than 64 logic channels."));
1287
1288         if (!cur_samplerate_)
1289                 try {
1290                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1291                 } catch (Error& e) {
1292                         // Do nothing
1293                 }
1294
1295         lock_guard<recursive_mutex> lock(data_mutex_);
1296
1297         if (!logic_data_) {
1298                 // The only reason logic_data_ would not have been created is
1299                 // if it was not possible to determine the signals when the
1300                 // device was created.
1301                 update_signals();
1302         }
1303
1304         if (!cur_logic_segment_) {
1305                 // This could be the first packet after a trigger
1306                 set_capture_state(Running);
1307
1308                 // Create a new data segment
1309                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1310                         *logic_data_, logic_data_->get_segment_count(),
1311                         logic->unit_size(), cur_samplerate_);
1312                 logic_data_->push_segment(cur_logic_segment_);
1313
1314                 signal_new_segment();
1315         }
1316
1317         cur_logic_segment_->append_payload(logic);
1318
1319         data_received();
1320 }
1321
1322 void Session::feed_in_analog(shared_ptr<Analog> analog)
1323 {
1324         if (analog->num_samples() == 0) {
1325                 qDebug() << "WARNING: Received analog packet with 0 samples.";
1326                 return;
1327         }
1328
1329         if (!cur_samplerate_)
1330                 try {
1331                         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
1332                 } catch (Error& e) {
1333                         // Do nothing
1334                 }
1335
1336         lock_guard<recursive_mutex> lock(data_mutex_);
1337
1338         const vector<shared_ptr<Channel>> channels = analog->channels();
1339         bool sweep_beginning = false;
1340
1341         unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
1342         analog->get_data_as_float(data.get());
1343
1344         if (signalbases_.empty())
1345                 update_signals();
1346
1347         float *channel_data = data.get();
1348         for (auto& channel : channels) {
1349                 shared_ptr<data::AnalogSegment> segment;
1350
1351                 // Try to get the segment of the channel
1352                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1353                         iterator iter = cur_analog_segments_.find(channel);
1354                 if (iter != cur_analog_segments_.end())
1355                         segment = (*iter).second;
1356                 else {
1357                         // If no segment was found, this means we haven't
1358                         // created one yet. i.e. this is the first packet
1359                         // in the sweep containing this segment.
1360                         sweep_beginning = true;
1361
1362                         // Find the analog data associated with the channel
1363                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1364                         assert(base);
1365
1366                         shared_ptr<data::Analog> data(base->analog_data());
1367                         assert(data);
1368
1369                         // Create a segment, keep it in the maps of channels
1370                         segment = make_shared<data::AnalogSegment>(
1371                                 *data, data->get_segment_count(), cur_samplerate_);
1372                         cur_analog_segments_[channel] = segment;
1373
1374                         // Push the segment into the analog data.
1375                         data->push_segment(segment);
1376
1377                         signal_new_segment();
1378                 }
1379
1380                 assert(segment);
1381
1382                 // Append the samples in the segment
1383                 segment->append_interleaved_samples(channel_data++, analog->num_samples(),
1384                         channels.size());
1385         }
1386
1387         if (sweep_beginning) {
1388                 // This could be the first packet after a trigger
1389                 set_capture_state(Running);
1390         }
1391
1392         data_received();
1393 }
1394
1395 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1396         shared_ptr<Packet> packet)
1397 {
1398         (void)device;
1399
1400         assert(device);
1401         assert(device == device_->device());
1402         assert(packet);
1403
1404         switch (packet->type()->id()) {
1405         case SR_DF_HEADER:
1406                 feed_in_header();
1407                 break;
1408
1409         case SR_DF_META:
1410                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1411                 break;
1412
1413         case SR_DF_TRIGGER:
1414                 feed_in_trigger();
1415                 break;
1416
1417         case SR_DF_LOGIC:
1418                 try {
1419                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1420                 } catch (bad_alloc&) {
1421                         out_of_memory_ = true;
1422                         device_->stop();
1423                 }
1424                 break;
1425
1426         case SR_DF_ANALOG:
1427                 try {
1428                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1429                 } catch (bad_alloc&) {
1430                         out_of_memory_ = true;
1431                         device_->stop();
1432                 }
1433                 break;
1434
1435         case SR_DF_FRAME_BEGIN:
1436                 feed_in_frame_begin();
1437                 break;
1438
1439         case SR_DF_FRAME_END:
1440                 feed_in_frame_end();
1441                 break;
1442
1443         case SR_DF_END:
1444                 // Strictly speaking, this is performed when a frame end marker was
1445                 // received, so there's no point doing this again. However, not all
1446                 // devices use frames, and for those devices, we need to do it here.
1447                 {
1448                         lock_guard<recursive_mutex> lock(data_mutex_);
1449
1450                         if (cur_logic_segment_)
1451                                 cur_logic_segment_->set_complete();
1452
1453                         for (auto& entry : cur_analog_segments_) {
1454                                 shared_ptr<data::AnalogSegment> segment = entry.second;
1455                                 segment->set_complete();
1456                         }
1457
1458                         cur_logic_segment_.reset();
1459                         cur_analog_segments_.clear();
1460                 }
1461                 break;
1462
1463         default:
1464                 break;
1465         }
1466 }
1467
1468 void Session::on_data_saved()
1469 {
1470         data_saved_ = true;
1471 }
1472
1473 #ifdef ENABLE_DECODE
1474 void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
1475 {
1476         assert(decoders.size() > 0);
1477
1478         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
1479
1480         if (signal)
1481                 for (const srd_decoder* d : decoders)
1482                         signal->stack_decoder(d);
1483 }
1484 #endif
1485
1486 } // namespace pv