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 "session.hpp"
  32
  33 #include "data/analog.hpp"
  34 #include "data/analogsegment.hpp"
  35 #include "data/decode/decoder.hpp"
  36 #include "data/logic.hpp"
  37 #include "data/logicsegment.hpp"
  38 #include "data/signalbase.hpp"
  39
  40 #include "devices/hardwaredevice.hpp"
  41 #include "devices/inputfile.hpp"
  42 #include "devices/sessionfile.hpp"
  43
  44 #include "toolbars/mainbar.hpp"
  45
  46 #include "views/trace/analogsignal.hpp"
  47 #include "views/trace/decodetrace.hpp"
  48 #include "views/trace/logicsignal.hpp"
  49 #include "views/trace/signal.hpp"
  50 #include "views/trace/view.hpp"
  51
  52 #include <libsigrokcxx/libsigrokcxx.hpp>
  53
  54 #ifdef ENABLE_DECODE
  55 #include <libsigrokdecode/libsigrokdecode.h>
  56 #include "data/decodesignal.hpp"
  57 #endif
  58
  59 using std::bad_alloc;
  60 using std::dynamic_pointer_cast;
  61 using std::find_if;
  62 using std::function;
  63 using std::lock_guard;
  64 using std::list;
  65 using std::make_pair;
  66 using std::make_shared;
  67 using std::map;
  68 using std::max;
  69 using std::move;
  70 using std::mutex;
  71 using std::pair;
  72 using std::recursive_mutex;
  73 using std::runtime_error;
  74 using std::shared_ptr;
  75 using std::string;
  76 using std::unique_ptr;
  77 using std::unordered_set;
  78 using std::vector;
  79
  80 using sigrok::Analog;
  81 using sigrok::Channel;
  82 using sigrok::ConfigKey;
  83 using sigrok::DatafeedCallbackFunction;
  84 using sigrok::Error;
  85 using sigrok::InputFormat;
  86 using sigrok::Logic;
  87 using sigrok::Meta;
  88 using sigrok::Packet;
  89 using sigrok::Session;
  90
  91 using Glib::VariantBase;
  92
  93 namespace pv {
  94
  95 shared_ptr<sigrok::Context> Session::sr_context;
  96
  97 Session::Session(DeviceManager &device_manager, QString name) :
  98         device_manager_(device_manager),
  99         default_name_(name),
 100         name_(name),
 101         capture_state_(Stopped),
 102         cur_samplerate_(0),
 103         data_saved_(true)
 104 {
 105 }
 106
 107 Session::~Session()
 108 {
 109         // Stop and join to the thread
 110         stop_capture();
 111 }
 112
 113 DeviceManager& Session::device_manager()
 114 {
 115         return device_manager_;
 116 }
 117
 118 const DeviceManager& Session::device_manager() const
 119 {
 120         return device_manager_;
 121 }
 122
 123 shared_ptr<sigrok::Session> Session::session() const
 124 {
 125         if (!device_)
 126                 return shared_ptr<sigrok::Session>();
 127         return device_->session();
 128 }
 129
 130 shared_ptr<devices::Device> Session::device() const
 131 {
 132         return device_;
 133 }
 134
 135 QString Session::name() const
 136 {
 137         return name_;
 138 }
 139
 140 void Session::set_name(QString name)
 141 {
 142         if (default_name_.isEmpty())
 143                 default_name_ = name;
 144
 145         name_ = name;
 146
 147         name_changed();
 148 }
 149
 150 const list< shared_ptr<views::ViewBase> > Session::views() const
 151 {
 152         return views_;
 153 }
 154
 155 shared_ptr<views::ViewBase> Session::main_view() const
 156 {
 157         return main_view_;
 158 }
 159
 160 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 161 {
 162         main_bar_ = main_bar;
 163 }
 164
 165 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 166 {
 167         return main_bar_;
 168 }
 169
 170 bool Session::data_saved() const
 171 {
 172         return data_saved_;
 173 }
 174
 175 void Session::save_settings(QSettings &settings) const
 176 {
 177         map<string, string> dev_info;
 178         list<string> key_list;
 179         int decode_signals = 0, views = 0;
 180
 181         if (device_) {
 182                 shared_ptr<devices::HardwareDevice> hw_device =
 183                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 184
 185                 if (hw_device) {
 186                         settings.setValue("device_type", "hardware");
 187                         settings.beginGroup("device");
 188
 189                         key_list.emplace_back("vendor");
 190                         key_list.emplace_back("model");
 191                         key_list.emplace_back("version");
 192                         key_list.emplace_back("serial_num");
 193                         key_list.emplace_back("connection_id");
 194
 195                         dev_info = device_manager_.get_device_info(device_);
 196
 197                         for (string key : key_list) {
 198                                 if (dev_info.count(key))
 199                                         settings.setValue(QString::fromUtf8(key.c_str()),
 200                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 201                                 else
 202                                         settings.remove(QString::fromUtf8(key.c_str()));
 203                         }
 204
 205                         settings.endGroup();
 206                 }
 207
 208                 shared_ptr<devices::SessionFile> sessionfile_device =
 209                         dynamic_pointer_cast< devices::SessionFile >(device_);
 210
 211                 if (sessionfile_device) {
 212                         settings.setValue("device_type", "sessionfile");
 213                         settings.beginGroup("device");
 214                         settings.setValue("filename", QString::fromStdString(
 215                                 sessionfile_device->full_name()));
 216                         settings.endGroup();
 217                 }
 218
 219                 // Save channels and decoders
 220                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 221 #ifdef ENABLE_DECODE
 222                         if (base->is_decode_signal()) {
 223                                 settings.beginGroup("decode_signal" + QString::number(decode_signals++));
 224                                 base->save_settings(settings);
 225                                 settings.endGroup();
 226                         } else
 227 #endif
 228                         {
 229                                 settings.beginGroup(base->internal_name());
 230                                 base->save_settings(settings);
 231                                 settings.endGroup();
 232                         }
 233                 }
 234
 235                 settings.setValue("decode_signals", decode_signals);
 236
 237                 // Save view states and their signal settings
 238                 // Note: main_view must be saved as view0
 239                 settings.beginGroup("view" + QString::number(views++));
 240                 main_view_->save_settings(settings);
 241                 settings.endGroup();
 242
 243                 for (shared_ptr<views::ViewBase> view : views_) {
 244                         if (view != main_view_) {
 245                                 settings.beginGroup("view" + QString::number(views++));
 246                                 view->save_settings(settings);
 247                                 settings.endGroup();
 248                         }
 249                 }
 250
 251                 settings.setValue("views", views);
 252         }
 253 }
 254
 255 void Session::restore_settings(QSettings &settings)
 256 {
 257         shared_ptr<devices::Device> device;
 258
 259         QString device_type = settings.value("device_type").toString();
 260
 261         if (device_type == "hardware") {
 262                 map<string, string> dev_info;
 263                 list<string> key_list;
 264
 265                 // Re-select last used device if possible but only if it's not demo
 266                 settings.beginGroup("device");
 267                 key_list.emplace_back("vendor");
 268                 key_list.emplace_back("model");
 269                 key_list.emplace_back("version");
 270                 key_list.emplace_back("serial_num");
 271                 key_list.emplace_back("connection_id");
 272
 273                 for (string key : key_list) {
 274                         const QString k = QString::fromStdString(key);
 275                         if (!settings.contains(k))
 276                                 continue;
 277
 278                         const string value = settings.value(k).toString().toStdString();
 279                         if (!value.empty())
 280                                 dev_info.insert(make_pair(key, value));
 281                 }
 282
 283                 if (dev_info.count("model") > 0)
 284                         device = device_manager_.find_device_from_info(dev_info);
 285
 286                 if (device)
 287                         set_device(device);
 288
 289                 settings.endGroup();
 290         }
 291
 292         if (device_type == "sessionfile") {
 293                 settings.beginGroup("device");
 294                 QString filename = settings.value("filename").toString();
 295                 settings.endGroup();
 296
 297                 if (QFileInfo(filename).isReadable()) {
 298                         device = make_shared<devices::SessionFile>(device_manager_.context(),
 299                                 filename.toStdString());
 300                         set_device(device);
 301
 302                         // TODO Perform error handling
 303                         start_capture([](QString infoMessage) { (void)infoMessage; });
 304
 305                         set_name(QFileInfo(filename).fileName());
 306                 }
 307         }
 308
 309         if (device) {
 310                 // Restore channels
 311                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 312                         settings.beginGroup(base->internal_name());
 313                         base->restore_settings(settings);
 314                         settings.endGroup();
 315                 }
 316
 317                 // Restore decoders
 318 #ifdef ENABLE_DECODE
 319                 int decode_signals = settings.value("decode_signals").toInt();
 320
 321                 for (int i = 0; i < decode_signals; i++) {
 322                         settings.beginGroup("decode_signal" + QString::number(i));
 323                         shared_ptr<data::DecodeSignal> signal = add_decode_signal();
 324                         signal->restore_settings(settings);
 325                         settings.endGroup();
 326                 }
 327 #endif
 328
 329                 // Restore views
 330                 int views = settings.value("views").toInt();
 331
 332                 for (int i = 0; i < views; i++) {
 333                         settings.beginGroup("view" + QString::number(i));
 334
 335                         if (i > 0) {
 336                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 337                                 add_view(name_, type, this);
 338                                 views_.back()->restore_settings(settings);
 339                         } else
 340                                 main_view_->restore_settings(settings);
 341
 342                         settings.endGroup();
 343                 }
 344         }
 345 }
 346
 347 void Session::select_device(shared_ptr<devices::Device> device)
 348 {
 349         try {
 350                 if (device)
 351                         set_device(device);
 352                 else
 353                         set_default_device();
 354         } catch (const QString &e) {
 355                 main_bar_->session_error(tr("Failed to Select Device"),
 356                         tr("Failed to Select Device"));
 357         }
 358 }
 359
 360 void Session::set_device(shared_ptr<devices::Device> device)
 361 {
 362         assert(device);
 363
 364         // Ensure we are not capturing before setting the device
 365         stop_capture();
 366
 367         if (device_)
 368                 device_->close();
 369
 370         device_.reset();
 371
 372         // Revert name back to default name (e.g. "Session 1") as the data is gone
 373         name_ = default_name_;
 374         name_changed();
 375
 376         // Remove all stored data
 377         for (shared_ptr<views::ViewBase> view : views_) {
 378                 view->clear_signals();
 379 #ifdef ENABLE_DECODE
 380                 view->clear_decode_signals();
 381 #endif
 382         }
 383         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 384                 d->clear();
 385         all_signal_data_.clear();
 386         signalbases_.clear();
 387         cur_logic_segment_.reset();
 388
 389         for (auto entry : cur_analog_segments_) {
 390                 shared_ptr<sigrok::Channel>(entry.first).reset();
 391                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 392         }
 393
 394         logic_data_.reset();
 395
 396         signals_changed();
 397
 398         device_ = move(device);
 399
 400         try {
 401                 device_->open();
 402         } catch (const QString &e) {
 403                 device_.reset();
 404         }
 405
 406         if (device_) {
 407                 device_->session()->add_datafeed_callback([=]
 408                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 409                                 data_feed_in(device, packet);
 410                         });
 411
 412                 update_signals();
 413         }
 414
 415         device_changed();
 416 }
 417
 418 void Session::set_default_device()
 419 {
 420         const list< shared_ptr<devices::HardwareDevice> > &devices =
 421                 device_manager_.devices();
 422
 423         if (devices.empty())
 424                 return;
 425
 426         // Try and find the demo device and select that by default
 427         const auto iter = find_if(devices.begin(), devices.end(),
 428                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 429                         return d->hardware_device()->driver()->name() == "demo";        });
 430         set_device((iter == devices.end()) ? devices.front() : *iter);
 431 }
 432
 433 /**
 434  * Convert generic options to data types that are specific to InputFormat.
 435  *
 436  * @param[in] user_spec Vector of tokenized words, string format.
 437  * @param[in] fmt_opts Input format's options, result of InputFormat::options().
 438  *
 439  * @return Map of options suitable for InputFormat::create_input().
 440  */
 441 map<string, Glib::VariantBase>
 442 Session::input_format_options(vector<string> user_spec,
 443                 map<string, shared_ptr<Option>> fmt_opts)
 444 {
 445         map<string, Glib::VariantBase> result;
 446
 447         for (auto entry : user_spec) {
 448                 /*
 449                  * Split key=value specs. Accept entries without separator
 450                  * (for simplified boolean specifications).
 451                  */
 452                 string key, val;
 453                 size_t pos = entry.find("=");
 454                 if (pos == std::string::npos) {
 455                         key = entry;
 456                         val = "";
 457                 } else {
 458                         key = entry.substr(0, pos);
 459                         val = entry.substr(pos + 1);
 460                 }
 461
 462                 /*
 463                  * Skip user specifications that are not a member of the
 464                  * format's set of supported options. Have the text input
 465                  * spec converted to the required input format specific
 466                  * data type.
 467                  */
 468                 auto found = fmt_opts.find(key);
 469                 if (found == fmt_opts.end())
 470                         continue;
 471                 shared_ptr<Option> opt = found->second;
 472                 result[key] = opt->parse_string(val);
 473         }
 474
 475         return result;
 476 }
 477
 478 void Session::load_init_file(const string &file_name, const string &format)
 479 {
 480         shared_ptr<InputFormat> input_format;
 481         map<string, Glib::VariantBase> input_opts;
 482
 483         if (!format.empty()) {
 484                 const map<string, shared_ptr<InputFormat> > formats =
 485                         device_manager_.context()->input_formats();
 486                 auto user_opts = pv::util::split_string(format, ":");
 487                 string user_name = user_opts.front();
 488                 user_opts.erase(user_opts.begin());
 489                 const auto iter = find_if(formats.begin(), formats.end(),
 490                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 491                                 return f.first == user_name; });
 492                 if (iter == formats.end()) {
 493                         main_bar_->session_error(tr("Error"),
 494                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 495                         return;
 496                 }
 497                 input_format = (*iter).second;
 498                 input_opts = input_format_options(user_opts,
 499                         input_format->options());
 500         }
 501
 502         load_file(QString::fromStdString(file_name), input_format, input_opts);
 503 }
 504
 505 void Session::load_file(QString file_name,
 506         shared_ptr<sigrok::InputFormat> format,
 507         const map<string, Glib::VariantBase> &options)
 508 {
 509         const QString errorMessage(
 510                 QString("Failed to load file %1").arg(file_name));
 511
 512         try {
 513                 if (format)
 514                         set_device(shared_ptr<devices::Device>(
 515                                 new devices::InputFile(
 516                                         device_manager_.context(),
 517                                         file_name.toStdString(),
 518                                         format, options)));
 519                 else
 520                         set_device(shared_ptr<devices::Device>(
 521                                 new devices::SessionFile(
 522                                         device_manager_.context(),
 523                                         file_name.toStdString())));
 524         } catch (Error e) {
 525                 main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
 526                 set_default_device();
 527                 main_bar_->update_device_list();
 528                 return;
 529         }
 530
 531         main_bar_->update_device_list();
 532
 533         start_capture([&, errorMessage](QString infoMessage) {
 534                 main_bar_->session_error(errorMessage, infoMessage); });
 535
 536         set_name(QFileInfo(file_name).fileName());
 537 }
 538
 539 Session::capture_state Session::get_capture_state() const
 540 {
 541         lock_guard<mutex> lock(sampling_mutex_);
 542         return capture_state_;
 543 }
 544
 545 void Session::start_capture(function<void (const QString)> error_handler)
 546 {
 547         if (!device_) {
 548                 error_handler(tr("No active device set, can't start acquisition."));
 549                 return;
 550         }
 551
 552         stop_capture();
 553
 554         // Check that at least one channel is enabled
 555         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 556         if (sr_dev) {
 557                 const auto channels = sr_dev->channels();
 558                 if (!any_of(channels.begin(), channels.end(),
 559                         [](shared_ptr<Channel> channel) {
 560                                 return channel->enabled(); })) {
 561                         error_handler(tr("No channels enabled."));
 562                         return;
 563                 }
 564         }
 565
 566         // Clear signal data
 567         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 568                 d->clear();
 569
 570         // Revert name back to default name (e.g. "Session 1") for real devices
 571         // as the (possibly saved) data is gone. File devices keep their name.
 572         shared_ptr<devices::HardwareDevice> hw_device =
 573                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 574
 575         if (hw_device) {
 576                 name_ = default_name_;
 577                 name_changed();
 578         }
 579
 580         // Begin the session
 581         sampling_thread_ = std::thread(
 582                 &Session::sample_thread_proc, this, error_handler);
 583 }
 584
 585 void Session::stop_capture()
 586 {
 587         if (get_capture_state() != Stopped)
 588                 device_->stop();
 589
 590         // Check that sampling stopped
 591         if (sampling_thread_.joinable())
 592                 sampling_thread_.join();
 593 }
 594
 595 void Session::register_view(shared_ptr<views::ViewBase> view)
 596 {
 597         if (views_.empty()) {
 598                 main_view_ = view;
 599         }
 600
 601         views_.push_back(view);
 602
 603         // Add all device signals
 604         update_signals();
 605
 606         // Add all other signals
 607         unordered_set< shared_ptr<data::SignalBase> > view_signalbases =
 608                 view->signalbases();
 609
 610         views::trace::View *trace_view =
 611                 qobject_cast<views::trace::View*>(view.get());
 612
 613         if (trace_view) {
 614                 for (shared_ptr<data::SignalBase> signalbase : signalbases_) {
 615                         const int sb_exists = count_if(
 616                                 view_signalbases.cbegin(), view_signalbases.cend(),
 617                                 [&](const shared_ptr<data::SignalBase> &sb) {
 618                                         return sb == signalbase;
 619                                 });
 620                         // Add the signal to the view as it doesn't have it yet
 621                         if (!sb_exists)
 622                                 switch (signalbase->type()) {
 623                                 case data::SignalBase::AnalogChannel:
 624                                 case data::SignalBase::LogicChannel:
 625                                 case data::SignalBase::A2LChannel:
 626                                         break;
 627                                 case data::SignalBase::DecodeChannel:
 628 #ifdef ENABLE_DECODE
 629                                         trace_view->add_decode_signal(
 630                                                 dynamic_pointer_cast<data::DecodeSignal>(signalbase));
 631 #endif
 632                                         break;
 633                                 case data::SignalBase::MathChannel:
 634                                         // TBD
 635                                         break;
 636                                 }
 637                 }
 638         }
 639
 640         signals_changed();
 641 }
 642
 643 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 644 {
 645         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 646
 647         if (views_.empty()) {
 648                 main_view_.reset();
 649
 650                 // Without a view there can be no main bar
 651                 main_bar_.reset();
 652         }
 653 }
 654
 655 bool Session::has_view(shared_ptr<views::ViewBase> view)
 656 {
 657         for (shared_ptr<views::ViewBase> v : views_)
 658                 if (v == view)
 659                         return true;
 660
 661         return false;
 662 }
 663
 664 double Session::get_samplerate() const
 665 {
 666         double samplerate = 0.0;
 667
 668         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 669                 assert(d);
 670                 const vector< shared_ptr<pv::data::Segment> > segments =
 671                         d->segments();
 672                 for (const shared_ptr<pv::data::Segment> &s : segments)
 673                         samplerate = max(samplerate, s->samplerate());
 674         }
 675         // If there is no sample rate given we use samples as unit
 676         if (samplerate == 0.0)
 677                 samplerate = 1.0;
 678
 679         return samplerate;
 680 }
 681
 682 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 683 {
 684         return signalbases_;
 685 }
 686
 687 #ifdef ENABLE_DECODE
 688 shared_ptr<data::DecodeSignal> Session::add_decode_signal()
 689 {
 690         shared_ptr<data::DecodeSignal> signal;
 691
 692         try {
 693                 // Create the decode signal
 694                 signal = make_shared<data::DecodeSignal>(*this);
 695
 696                 signalbases_.insert(signal);
 697
 698                 // Add the decode signal to all views
 699                 for (shared_ptr<views::ViewBase> view : views_)
 700                         view->add_decode_signal(signal);
 701         } catch (runtime_error e) {
 702                 remove_decode_signal(signal);
 703                 return nullptr;
 704         }
 705
 706         signals_changed();
 707
 708         return signal;
 709 }
 710
 711 void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 712 {
 713         signalbases_.erase(signal);
 714
 715         for (shared_ptr<views::ViewBase> view : views_)
 716                 view->remove_decode_signal(signal);
 717
 718         signals_changed();
 719 }
 720 #endif
 721
 722 void Session::set_capture_state(capture_state state)
 723 {
 724         bool changed;
 725
 726         {
 727                 lock_guard<mutex> lock(sampling_mutex_);
 728                 changed = capture_state_ != state;
 729                 capture_state_ = state;
 730         }
 731
 732         if (changed)
 733                 capture_state_changed(state);
 734 }
 735
 736 void Session::update_signals()
 737 {
 738         if (!device_) {
 739                 signalbases_.clear();
 740                 logic_data_.reset();
 741                 for (shared_ptr<views::ViewBase> view : views_) {
 742                         view->clear_signals();
 743 #ifdef ENABLE_DECODE
 744                         view->clear_decode_signals();
 745 #endif
 746                 }
 747                 return;
 748         }
 749
 750         lock_guard<recursive_mutex> lock(data_mutex_);
 751
 752         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 753         if (!sr_dev) {
 754                 signalbases_.clear();
 755                 logic_data_.reset();
 756                 for (shared_ptr<views::ViewBase> view : views_) {
 757                         view->clear_signals();
 758 #ifdef ENABLE_DECODE
 759                         view->clear_decode_signals();
 760 #endif
 761                 }
 762                 return;
 763         }
 764
 765         // Detect what data types we will receive
 766         auto channels = sr_dev->channels();
 767         unsigned int logic_channel_count = count_if(
 768                 channels.begin(), channels.end(),
 769                 [] (shared_ptr<Channel> channel) {
 770                         return channel->type() == sigrok::ChannelType::LOGIC; });
 771
 772         // Create data containers for the logic data segments
 773         {
 774                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 775
 776                 if (logic_channel_count == 0) {
 777                         logic_data_.reset();
 778                 } else if (!logic_data_ ||
 779                         logic_data_->num_channels() != logic_channel_count) {
 780                         logic_data_.reset(new data::Logic(
 781                                 logic_channel_count));
 782                         assert(logic_data_);
 783                 }
 784         }
 785
 786         // Make the signals list
 787         for (shared_ptr<views::ViewBase> viewbase : views_) {
 788                 views::trace::View *trace_view =
 789                         qobject_cast<views::trace::View*>(viewbase.get());
 790
 791                 if (trace_view) {
 792                         unordered_set< shared_ptr<views::trace::Signal> >
 793                                 prev_sigs(trace_view->signals());
 794                         trace_view->clear_signals();
 795
 796                         for (auto channel : sr_dev->channels()) {
 797                                 shared_ptr<data::SignalBase> signalbase;
 798                                 shared_ptr<views::trace::Signal> signal;
 799
 800                                 // Find the channel in the old signals
 801                                 const auto iter = find_if(
 802                                         prev_sigs.cbegin(), prev_sigs.cend(),
 803                                         [&](const shared_ptr<views::trace::Signal> &s) {
 804                                                 return s->base()->channel() == channel;
 805                                         });
 806                                 if (iter != prev_sigs.end()) {
 807                                         // Copy the signal from the old set to the new
 808                                         signal = *iter;
 809                                         trace_view->add_signal(signal);
 810                                 } else {
 811                                         // Find the signalbase for this channel if possible
 812                                         signalbase.reset();
 813                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 814                                                 if (b->channel() == channel)
 815                                                         signalbase = b;
 816
 817                                         switch(channel->type()->id()) {
 818                                         case SR_CHANNEL_LOGIC:
 819                                                 if (!signalbase) {
 820                                                         signalbase = make_shared<data::SignalBase>(channel,
 821                                                                 data::SignalBase::LogicChannel);
 822                                                         signalbases_.insert(signalbase);
 823
 824                                                         all_signal_data_.insert(logic_data_);
 825                                                         signalbase->set_data(logic_data_);
 826
 827                                                         connect(this, SIGNAL(capture_state_changed(int)),
 828                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 829                                                 }
 830
 831                                                 signal = shared_ptr<views::trace::Signal>(
 832                                                         new views::trace::LogicSignal(*this,
 833                                                                 device_, signalbase));
 834                                                 trace_view->add_signal(signal);
 835                                                 break;
 836
 837                                         case SR_CHANNEL_ANALOG:
 838                                         {
 839                                                 if (!signalbase) {
 840                                                         signalbase = make_shared<data::SignalBase>(channel,
 841                                                                 data::SignalBase::AnalogChannel);
 842                                                         signalbases_.insert(signalbase);
 843
 844                                                         shared_ptr<data::Analog> data(new data::Analog());
 845                                                         all_signal_data_.insert(data);
 846                                                         signalbase->set_data(data);
 847
 848                                                         connect(this, SIGNAL(capture_state_changed(int)),
 849                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 850                                                 }
 851
 852                                                 signal = shared_ptr<views::trace::Signal>(
 853                                                         new views::trace::AnalogSignal(
 854                                                                 *this, signalbase));
 855                                                 trace_view->add_signal(signal);
 856                                                 break;
 857                                         }
 858
 859                                         default:
 860                                                 assert(false);
 861                                                 break;
 862                                         }
 863                                 }
 864                         }
 865                 }
 866         }
 867
 868         signals_changed();
 869 }
 870
 871 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 872         shared_ptr<sigrok::Channel> channel) const
 873 {
 874         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 875                 assert(sig);
 876                 if (sig->channel() == channel)
 877                         return sig;
 878         }
 879         return shared_ptr<data::SignalBase>();
 880 }
 881
 882 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 883 {
 884         assert(error_handler);
 885
 886         if (!device_)
 887                 return;
 888
 889         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 890
 891         out_of_memory_ = false;
 892
 893         try {
 894                 device_->start();
 895         } catch (Error e) {
 896                 error_handler(e.what());
 897                 return;
 898         }
 899
 900         set_capture_state(device_->session()->trigger() ?
 901                 AwaitingTrigger : Running);
 902
 903         try {
 904                 device_->run();
 905         } catch (Error e) {
 906                 error_handler(e.what());
 907                 set_capture_state(Stopped);
 908                 return;
 909         }
 910
 911         set_capture_state(Stopped);
 912
 913         // Confirm that SR_DF_END was received
 914         if (cur_logic_segment_) {
 915                 qDebug("SR_DF_END was not received.");
 916                 assert(false);
 917         }
 918
 919         // Optimize memory usage
 920         free_unused_memory();
 921
 922         // We now have unsaved data unless we just "captured" from a file
 923         shared_ptr<devices::File> file_device =
 924                 dynamic_pointer_cast<devices::File>(device_);
 925
 926         if (!file_device)
 927                 data_saved_ = false;
 928
 929         if (out_of_memory_)
 930                 error_handler(tr("Out of memory, acquisition stopped."));
 931 }
 932
 933 void Session::free_unused_memory()
 934 {
 935         for (shared_ptr<data::SignalData> data : all_signal_data_) {
 936                 const vector< shared_ptr<data::Segment> > segments = data->segments();
 937
 938                 for (shared_ptr<data::Segment> segment : segments) {
 939                         segment->free_unused_memory();
 940                 }
 941         }
 942 }
 943
 944 void Session::feed_in_header()
 945 {
 946         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 947 }
 948
 949 void Session::feed_in_meta(shared_ptr<Meta> meta)
 950 {
 951         for (auto entry : meta->config()) {
 952                 switch (entry.first->id()) {
 953                 case SR_CONF_SAMPLERATE:
 954                         // We can't rely on the header to always contain the sample rate,
 955                         // so in case it's supplied via a meta packet, we use it.
 956                         if (!cur_samplerate_)
 957                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 958
 959                         /// @todo handle samplerate changes
 960                         break;
 961                 default:
 962                         // Unknown metadata is not an error.
 963                         break;
 964                 }
 965         }
 966
 967         signals_changed();
 968 }
 969
 970 void Session::feed_in_trigger()
 971 {
 972         // The channel containing most samples should be most accurate
 973         uint64_t sample_count = 0;
 974
 975         {
 976                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 977                         assert(d);
 978                         uint64_t temp_count = 0;
 979
 980                         const vector< shared_ptr<pv::data::Segment> > segments =
 981                                 d->segments();
 982                         for (const shared_ptr<pv::data::Segment> &s : segments)
 983                                 temp_count += s->get_sample_count();
 984
 985                         if (temp_count > sample_count)
 986                                 sample_count = temp_count;
 987                 }
 988         }
 989
 990         trigger_event(sample_count / get_samplerate());
 991 }
 992
 993 void Session::feed_in_frame_begin()
 994 {
 995         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 996                 frame_began();
 997 }
 998
 999 void Session::feed_in_logic(shared_ptr<Logic> logic)
1000 {
1001         lock_guard<recursive_mutex> lock(data_mutex_);
1002
1003         if (!logic_data_) {
1004                 // The only reason logic_data_ would not have been created is
1005                 // if it was not possible to determine the signals when the
1006                 // device was created.
1007                 update_signals();
1008         }
1009
1010         if (!cur_logic_segment_) {
1011                 // This could be the first packet after a trigger
1012                 set_capture_state(Running);
1013
1014                 // Create a new data segment
1015                 cur_logic_segment_ = make_shared<data::LogicSegment>(
1016                         *logic_data_, logic->unit_size(), cur_samplerate_);
1017                 logic_data_->push_segment(cur_logic_segment_);
1018
1019                 // @todo Putting this here means that only listeners querying
1020                 // for logic will be notified. Currently the only user of
1021                 // frame_began is DecoderStack, but in future we need to signal
1022                 // this after both analog and logic sweeps have begun.
1023                 frame_began();
1024         }
1025
1026         cur_logic_segment_->append_payload(logic);
1027
1028         data_received();
1029 }
1030
1031 void Session::feed_in_analog(shared_ptr<Analog> analog)
1032 {
1033         lock_guard<recursive_mutex> lock(data_mutex_);
1034
1035         const vector<shared_ptr<Channel>> channels = analog->channels();
1036         const unsigned int channel_count = channels.size();
1037         const size_t sample_count = analog->num_samples() / channel_count;
1038         bool sweep_beginning = false;
1039
1040         unique_ptr<float> data(new float[analog->num_samples()]);
1041         analog->get_data_as_float(data.get());
1042
1043         if (signalbases_.empty())
1044                 update_signals();
1045
1046         float *channel_data = data.get();
1047         for (auto channel : channels) {
1048                 shared_ptr<data::AnalogSegment> segment;
1049
1050                 // Try to get the segment of the channel
1051                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1052                         iterator iter = cur_analog_segments_.find(channel);
1053                 if (iter != cur_analog_segments_.end())
1054                         segment = (*iter).second;
1055                 else {
1056                         // If no segment was found, this means we haven't
1057                         // created one yet. i.e. this is the first packet
1058                         // in the sweep containing this segment.
1059                         sweep_beginning = true;
1060
1061                         // Find the analog data associated with the channel
1062                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1063                         assert(base);
1064
1065                         shared_ptr<data::Analog> data(base->analog_data());
1066                         assert(data);
1067
1068                         // Create a segment, keep it in the maps of channels
1069                         segment = make_shared<data::AnalogSegment>(
1070                                 *data, cur_samplerate_);
1071                         cur_analog_segments_[channel] = segment;
1072
1073                         // Push the segment into the analog data.
1074                         data->push_segment(segment);
1075                 }
1076
1077                 assert(segment);
1078
1079                 // Append the samples in the segment
1080                 segment->append_interleaved_samples(channel_data++, sample_count,
1081                         channel_count);
1082         }
1083
1084         if (sweep_beginning) {
1085                 // This could be the first packet after a trigger
1086                 set_capture_state(Running);
1087         }
1088
1089         data_received();
1090 }
1091
1092 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1093         shared_ptr<Packet> packet)
1094 {
1095         static bool frame_began = false;
1096
1097         (void)device;
1098
1099         assert(device);
1100         assert(device == device_->device());
1101         assert(packet);
1102
1103         switch (packet->type()->id()) {
1104         case SR_DF_HEADER:
1105                 feed_in_header();
1106                 break;
1107
1108         case SR_DF_META:
1109                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1110                 break;
1111
1112         case SR_DF_TRIGGER:
1113                 feed_in_trigger();
1114                 break;
1115
1116         case SR_DF_FRAME_BEGIN:
1117                 feed_in_frame_begin();
1118                 frame_began = true;
1119                 break;
1120
1121         case SR_DF_LOGIC:
1122                 try {
1123                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1124                 } catch (bad_alloc) {
1125                         out_of_memory_ = true;
1126                         device_->stop();
1127                 }
1128                 break;
1129
1130         case SR_DF_ANALOG:
1131                 try {
1132                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1133                 } catch (bad_alloc) {
1134                         out_of_memory_ = true;
1135                         device_->stop();
1136                 }
1137                 break;
1138
1139         case SR_DF_FRAME_END:
1140         case SR_DF_END:
1141         {
1142                 {
1143                         lock_guard<recursive_mutex> lock(data_mutex_);
1144                         cur_logic_segment_.reset();
1145                         cur_analog_segments_.clear();
1146                 }
1147                 if (frame_began) {
1148                         frame_began = false;
1149                         frame_ended();
1150                 }
1151                 break;
1152         }
1153         default:
1154                 break;
1155         }
1156 }
1157
1158 void Session::on_data_saved()
1159 {
1160         data_saved_ = true;
1161 }
1162
1163 } // namespace pv