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 <QFileInfo>
  21
  22 #include <cassert>
  23 #include <memory>
  24 #include <mutex>
  25 #include <stdexcept>
  26
  27 #include <sys/stat.h>
  28
  29 #include "devicemanager.hpp"
  30 #include "session.hpp"
  31
  32 #include "data/analog.hpp"
  33 #include "data/analogsegment.hpp"
  34 #include "data/decode/decoder.hpp"
  35 #include "data/decoderstack.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 #endif
  57
  58 using std::bad_alloc;
  59 using std::dynamic_pointer_cast;
  60 using std::find_if;
  61 using std::function;
  62 using std::lock_guard;
  63 using std::list;
  64 using std::make_pair;
  65 using std::make_shared;
  66 using std::map;
  67 using std::max;
  68 using std::move;
  69 using std::mutex;
  70 using std::pair;
  71 using std::recursive_mutex;
  72 using std::runtime_error;
  73 using std::shared_ptr;
  74 using std::string;
  75 using std::unique_ptr;
  76 using std::unordered_set;
  77 using std::vector;
  78
  79 using sigrok::Analog;
  80 using sigrok::Channel;
  81 using sigrok::ConfigKey;
  82 using sigrok::DatafeedCallbackFunction;
  83 using sigrok::Error;
  84 using sigrok::InputFormat;
  85 using sigrok::Logic;
  86 using sigrok::Meta;
  87 using sigrok::Packet;
  88 using sigrok::Session;
  89
  90 using Glib::VariantBase;
  91
  92 namespace pv {
  93 Session::Session(DeviceManager &device_manager, QString name) :
  94         device_manager_(device_manager),
  95         default_name_(name),
  96         name_(name),
  97         capture_state_(Stopped),
  98         cur_samplerate_(0),
  99         data_saved_(true)
 100 {
 101 }
 102
 103 Session::~Session()
 104 {
 105         // Stop and join to the thread
 106         stop_capture();
 107 }
 108
 109 DeviceManager& Session::device_manager()
 110 {
 111         return device_manager_;
 112 }
 113
 114 const DeviceManager& Session::device_manager() const
 115 {
 116         return device_manager_;
 117 }
 118
 119 shared_ptr<sigrok::Session> Session::session() const
 120 {
 121         if (!device_)
 122                 return shared_ptr<sigrok::Session>();
 123         return device_->session();
 124 }
 125
 126 shared_ptr<devices::Device> Session::device() const
 127 {
 128         return device_;
 129 }
 130
 131 QString Session::name() const
 132 {
 133         return name_;
 134 }
 135
 136 void Session::set_name(QString name)
 137 {
 138         if (default_name_.isEmpty())
 139                 default_name_ = name;
 140
 141         name_ = name;
 142
 143         name_changed();
 144 }
 145
 146 const list< shared_ptr<views::ViewBase> > Session::views() const
 147 {
 148         return views_;
 149 }
 150
 151 shared_ptr<views::ViewBase> Session::main_view() const
 152 {
 153         return main_view_;
 154 }
 155
 156 void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 157 {
 158         main_bar_ = main_bar;
 159 }
 160
 161 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 162 {
 163         return main_bar_;
 164 }
 165
 166 bool Session::data_saved() const
 167 {
 168         return data_saved_;
 169 }
 170
 171 void Session::save_settings(QSettings &settings) const
 172 {
 173         map<string, string> dev_info;
 174         list<string> key_list;
 175         int stacks = 0, views = 0;
 176
 177         if (device_) {
 178                 shared_ptr<devices::HardwareDevice> hw_device =
 179                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 180
 181                 if (hw_device) {
 182                         settings.setValue("device_type", "hardware");
 183                         settings.beginGroup("device");
 184
 185                         key_list.emplace_back("vendor");
 186                         key_list.emplace_back("model");
 187                         key_list.emplace_back("version");
 188                         key_list.emplace_back("serial_num");
 189                         key_list.emplace_back("connection_id");
 190
 191                         dev_info = device_manager_.get_device_info(device_);
 192
 193                         for (string key : key_list) {
 194                                 if (dev_info.count(key))
 195                                         settings.setValue(QString::fromUtf8(key.c_str()),
 196                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 197                                 else
 198                                         settings.remove(QString::fromUtf8(key.c_str()));
 199                         }
 200
 201                         settings.endGroup();
 202                 }
 203
 204                 shared_ptr<devices::SessionFile> sessionfile_device =
 205                         dynamic_pointer_cast< devices::SessionFile >(device_);
 206
 207                 if (sessionfile_device) {
 208                         settings.setValue("device_type", "sessionfile");
 209                         settings.beginGroup("device");
 210                         settings.setValue("filename", QString::fromStdString(
 211                                 sessionfile_device->full_name()));
 212                         settings.endGroup();
 213                 }
 214
 215                 // Save channels and decoders
 216                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 217 #ifdef ENABLE_DECODE
 218                         if (base->is_decode_signal()) {
 219                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 220                                                 base->decoder_stack();
 221                                 shared_ptr<data::decode::Decoder> top_decoder =
 222                                                 decoder_stack->stack().front();
 223
 224                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 225                                 settings.setValue("id", top_decoder->decoder()->id);
 226                                 settings.setValue("name", top_decoder->decoder()->name);
 227                                 settings.endGroup();
 228                         } else
 229 #endif
 230                         {
 231                                 settings.beginGroup(base->internal_name());
 232                                 base->save_settings(settings);
 233                                 settings.endGroup();
 234                         }
 235                 }
 236
 237                 settings.setValue("decoder_stacks", stacks);
 238
 239                 // Save view states and their signal settings
 240                 // Note: main_view must be saved as view0
 241                 settings.beginGroup("view" + QString::number(views++));
 242                 main_view_->save_settings(settings);
 243                 settings.endGroup();
 244
 245                 for (shared_ptr<views::ViewBase> view : views_) {
 246                         if (view != main_view_) {
 247                                 settings.beginGroup("view" + QString::number(views++));
 248                                 view->save_settings(settings);
 249                                 settings.endGroup();
 250                         }
 251                 }
 252
 253                 settings.setValue("views", views);
 254         }
 255 }
 256
 257 void Session::restore_settings(QSettings &settings)
 258 {
 259         shared_ptr<devices::Device> device;
 260
 261         QString device_type = settings.value("device_type").toString();
 262
 263         if (device_type == "hardware") {
 264                 map<string, string> dev_info;
 265                 list<string> key_list;
 266
 267                 // Re-select last used device if possible but only if it's not demo
 268                 settings.beginGroup("device");
 269                 key_list.emplace_back("vendor");
 270                 key_list.emplace_back("model");
 271                 key_list.emplace_back("version");
 272                 key_list.emplace_back("serial_num");
 273                 key_list.emplace_back("connection_id");
 274
 275                 for (string key : key_list) {
 276                         const QString k = QString::fromStdString(key);
 277                         if (!settings.contains(k))
 278                                 continue;
 279
 280                         const string value = settings.value(k).toString().toStdString();
 281                         if (!value.empty())
 282                                 dev_info.insert(make_pair(key, value));
 283                 }
 284
 285                 if (dev_info.count("model") > 0)
 286                         device = device_manager_.find_device_from_info(dev_info);
 287
 288                 if (device)
 289                         set_device(device);
 290
 291                 settings.endGroup();
 292         }
 293
 294         if (device_type == "sessionfile") {
 295                 settings.beginGroup("device");
 296                 QString filename = settings.value("filename").toString();
 297                 settings.endGroup();
 298
 299                 if (QFileInfo(filename).isReadable()) {
 300                         device = make_shared<devices::SessionFile>(device_manager_.context(),
 301                                 filename.toStdString());
 302                         set_device(device);
 303
 304                         // TODO Perform error handling
 305                         start_capture([](QString infoMessage) { (void)infoMessage; });
 306
 307                         set_name(QFileInfo(filename).fileName());
 308                 }
 309         }
 310
 311         if (device) {
 312                 // Restore channels
 313                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 314                         settings.beginGroup(base->internal_name());
 315                         base->restore_settings(settings);
 316                         settings.endGroup();
 317                 }
 318
 319                 // Restore decoders
 320 #ifdef ENABLE_DECODE
 321                 int stacks = settings.value("decoder_stacks").toInt();
 322
 323                 for (int i = 0; i < stacks; i++) {
 324                         settings.beginGroup("decoder_stack" + QString::number(i++));
 325
 326                         QString id = settings.value("id").toString();
 327                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 328
 329                         settings.endGroup();
 330                 }
 331 #endif
 332
 333                 // Restore views
 334                 int views = settings.value("views").toInt();
 335
 336                 for (int i = 0; i < views; i++) {
 337                         settings.beginGroup("view" + QString::number(i));
 338
 339                         if (i > 0) {
 340                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 341                                 add_view(name_, type, this);
 342                                 views_.back()->restore_settings(settings);
 343                         } else
 344                                 main_view_->restore_settings(settings);
 345
 346                         settings.endGroup();
 347                 }
 348         }
 349 }
 350
 351 void Session::select_device(shared_ptr<devices::Device> device)
 352 {
 353         try {
 354                 if (device)
 355                         set_device(device);
 356                 else
 357                         set_default_device();
 358         } catch (const QString &e) {
 359                 main_bar_->session_error(tr("Failed to Select Device"),
 360                         tr("Failed to Select Device"));
 361         }
 362 }
 363
 364 void Session::set_device(shared_ptr<devices::Device> device)
 365 {
 366         assert(device);
 367
 368         // Ensure we are not capturing before setting the device
 369         stop_capture();
 370
 371         if (device_)
 372                 device_->close();
 373
 374         device_.reset();
 375
 376         // Revert name back to default name (e.g. "Session 1") as the data is gone
 377         name_ = default_name_;
 378         name_changed();
 379
 380         // Remove all stored data
 381         for (shared_ptr<views::ViewBase> view : views_) {
 382                 view->clear_signals();
 383 #ifdef ENABLE_DECODE
 384                 view->clear_decode_signals();
 385 #endif
 386         }
 387         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 388                 d->clear();
 389         all_signal_data_.clear();
 390         signalbases_.clear();
 391         cur_logic_segment_.reset();
 392
 393         for (auto entry : cur_analog_segments_) {
 394                 shared_ptr<sigrok::Channel>(entry.first).reset();
 395                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 396         }
 397
 398         logic_data_.reset();
 399
 400         signals_changed();
 401
 402         device_ = move(device);
 403
 404         try {
 405                 device_->open();
 406         } catch (const QString &e) {
 407                 device_.reset();
 408         }
 409
 410         if (device_) {
 411                 device_->session()->add_datafeed_callback([=]
 412                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 413                                 data_feed_in(device, packet);
 414                         });
 415
 416                 update_signals();
 417         }
 418
 419         device_changed();
 420 }
 421
 422 void Session::set_default_device()
 423 {
 424         const list< shared_ptr<devices::HardwareDevice> > &devices =
 425                 device_manager_.devices();
 426
 427         if (devices.empty())
 428                 return;
 429
 430         // Try and find the demo device and select that by default
 431         const auto iter = find_if(devices.begin(), devices.end(),
 432                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 433                         return d->hardware_device()->driver()->name() == "demo";        });
 434         set_device((iter == devices.end()) ? devices.front() : *iter);
 435 }
 436
 437 void Session::load_init_file(const string &file_name, const string &format)
 438 {
 439         shared_ptr<InputFormat> input_format;
 440
 441         if (!format.empty()) {
 442                 const map<string, shared_ptr<InputFormat> > formats =
 443                         device_manager_.context()->input_formats();
 444                 const auto iter = find_if(formats.begin(), formats.end(),
 445                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 446                                 return f.first == format; });
 447                 if (iter == formats.end()) {
 448                         main_bar_->session_error(tr("Error"),
 449                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 450                         return;
 451                 }
 452
 453                 input_format = (*iter).second;
 454         }
 455
 456         load_file(QString::fromStdString(file_name), input_format);
 457 }
 458
 459 void Session::load_file(QString file_name,
 460         shared_ptr<sigrok::InputFormat> format,
 461         const map<string, Glib::VariantBase> &options)
 462 {
 463         const QString errorMessage(
 464                 QString("Failed to load file %1").arg(file_name));
 465
 466         try {
 467                 if (format)
 468                         set_device(shared_ptr<devices::Device>(
 469                                 new devices::InputFile(
 470                                         device_manager_.context(),
 471                                         file_name.toStdString(),
 472                                         format, options)));
 473                 else
 474                         set_device(shared_ptr<devices::Device>(
 475                                 new devices::SessionFile(
 476                                         device_manager_.context(),
 477                                         file_name.toStdString())));
 478         } catch (Error e) {
 479                 main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
 480                 set_default_device();
 481                 main_bar_->update_device_list();
 482                 return;
 483         }
 484
 485         main_bar_->update_device_list();
 486
 487         start_capture([&, errorMessage](QString infoMessage) {
 488                 main_bar_->session_error(errorMessage, infoMessage); });
 489
 490         set_name(QFileInfo(file_name).fileName());
 491 }
 492
 493 Session::capture_state Session::get_capture_state() const
 494 {
 495         lock_guard<mutex> lock(sampling_mutex_);
 496         return capture_state_;
 497 }
 498
 499 void Session::start_capture(function<void (const QString)> error_handler)
 500 {
 501         if (!device_) {
 502                 error_handler(tr("No active device set, can't start acquisition."));
 503                 return;
 504         }
 505
 506         stop_capture();
 507
 508         // Check that at least one channel is enabled
 509         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 510         if (sr_dev) {
 511                 const auto channels = sr_dev->channels();
 512                 if (!any_of(channels.begin(), channels.end(),
 513                         [](shared_ptr<Channel> channel) {
 514                                 return channel->enabled(); })) {
 515                         error_handler(tr("No channels enabled."));
 516                         return;
 517                 }
 518         }
 519
 520         // Clear signal data
 521         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 522                 d->clear();
 523
 524         // Revert name back to default name (e.g. "Session 1") for real devices
 525         // as the (possibly saved) data is gone. File devices keep their name.
 526         shared_ptr<devices::HardwareDevice> hw_device =
 527                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 528
 529         if (hw_device) {
 530                 name_ = default_name_;
 531                 name_changed();
 532         }
 533
 534         // Begin the session
 535         sampling_thread_ = std::thread(
 536                 &Session::sample_thread_proc, this, error_handler);
 537 }
 538
 539 void Session::stop_capture()
 540 {
 541         if (get_capture_state() != Stopped)
 542                 device_->stop();
 543
 544         // Check that sampling stopped
 545         if (sampling_thread_.joinable())
 546                 sampling_thread_.join();
 547 }
 548
 549 void Session::register_view(shared_ptr<views::ViewBase> view)
 550 {
 551         if (views_.empty()) {
 552                 main_view_ = view;
 553         }
 554
 555         views_.push_back(view);
 556
 557         update_signals();
 558 }
 559
 560 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 561 {
 562         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 563
 564         if (views_.empty()) {
 565                 main_view_.reset();
 566
 567                 // Without a view there can be no main bar
 568                 main_bar_.reset();
 569         }
 570 }
 571
 572 bool Session::has_view(shared_ptr<views::ViewBase> view)
 573 {
 574         for (shared_ptr<views::ViewBase> v : views_)
 575                 if (v == view)
 576                         return true;
 577
 578         return false;
 579 }
 580
 581 double Session::get_samplerate() const
 582 {
 583         double samplerate = 0.0;
 584
 585         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 586                 assert(d);
 587                 const vector< shared_ptr<pv::data::Segment> > segments =
 588                         d->segments();
 589                 for (const shared_ptr<pv::data::Segment> &s : segments)
 590                         samplerate = max(samplerate, s->samplerate());
 591         }
 592         // If there is no sample rate given we use samples as unit
 593         if (samplerate == 0.0)
 594                 samplerate = 1.0;
 595
 596         return samplerate;
 597 }
 598
 599 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 600 {
 601         return signalbases_;
 602 }
 603
 604 #ifdef ENABLE_DECODE
 605 bool Session::add_decoder(srd_decoder *const dec)
 606 {
 607         if (!dec)
 608                 return false;
 609
 610         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 611         shared_ptr<data::DecoderStack> decoder_stack;
 612
 613         try {
 614                 // Create the decoder
 615                 decoder_stack = make_shared<data::DecoderStack>(*this, dec);
 616
 617                 // Make a list of all the channels
 618                 vector<const srd_channel*> all_channels;
 619                 for (const GSList *i = dec->channels; i; i = i->next)
 620                         all_channels.push_back((const srd_channel*)i->data);
 621                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 622                         all_channels.push_back((const srd_channel*)i->data);
 623
 624                 // Auto select the initial channels
 625                 for (const srd_channel *pdch : all_channels)
 626                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 627                                 if (b->logic_data()) {
 628                                         if (QString::fromUtf8(pdch->name).toLower().
 629                                                 contains(b->name().toLower()))
 630                                                 channels[pdch] = b;
 631                                 }
 632                         }
 633
 634                 assert(decoder_stack);
 635                 assert(!decoder_stack->stack().empty());
 636                 assert(decoder_stack->stack().front());
 637                 decoder_stack->stack().front()->set_channels(channels);
 638
 639                 // Create the decode signal
 640                 shared_ptr<data::SignalBase> signalbase =
 641                         make_shared<data::SignalBase>(nullptr, data::SignalBase::DecodeChannel);
 642
 643                 signalbase->set_decoder_stack(decoder_stack);
 644                 signalbases_.insert(signalbase);
 645
 646                 for (shared_ptr<views::ViewBase> view : views_)
 647                         view->add_decode_signal(signalbase);
 648         } catch (runtime_error e) {
 649                 return false;
 650         }
 651
 652         signals_changed();
 653
 654         // Do an initial decode
 655         decoder_stack->begin_decode();
 656
 657         return true;
 658 }
 659
 660 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 661 {
 662         signalbases_.erase(signalbase);
 663
 664         for (shared_ptr<views::ViewBase> view : views_)
 665                 view->remove_decode_signal(signalbase);
 666
 667         signals_changed();
 668 }
 669 #endif
 670
 671 void Session::set_capture_state(capture_state state)
 672 {
 673         bool changed;
 674
 675         {
 676                 lock_guard<mutex> lock(sampling_mutex_);
 677                 changed = capture_state_ != state;
 678                 capture_state_ = state;
 679         }
 680
 681         if (changed)
 682                 capture_state_changed(state);
 683 }
 684
 685 void Session::update_signals()
 686 {
 687         if (!device_) {
 688                 signalbases_.clear();
 689                 logic_data_.reset();
 690                 for (shared_ptr<views::ViewBase> view : views_) {
 691                         view->clear_signals();
 692 #ifdef ENABLE_DECODE
 693                         view->clear_decode_signals();
 694 #endif
 695                 }
 696                 return;
 697         }
 698
 699         lock_guard<recursive_mutex> lock(data_mutex_);
 700
 701         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 702         if (!sr_dev) {
 703                 signalbases_.clear();
 704                 logic_data_.reset();
 705                 for (shared_ptr<views::ViewBase> view : views_) {
 706                         view->clear_signals();
 707 #ifdef ENABLE_DECODE
 708                         view->clear_decode_signals();
 709 #endif
 710                 }
 711                 return;
 712         }
 713
 714         // Detect what data types we will receive
 715         auto channels = sr_dev->channels();
 716         unsigned int logic_channel_count = count_if(
 717                 channels.begin(), channels.end(),
 718                 [] (shared_ptr<Channel> channel) {
 719                         return channel->type() == sigrok::ChannelType::LOGIC; });
 720
 721         // Create data containers for the logic data segments
 722         {
 723                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 724
 725                 if (logic_channel_count == 0) {
 726                         logic_data_.reset();
 727                 } else if (!logic_data_ ||
 728                         logic_data_->num_channels() != logic_channel_count) {
 729                         logic_data_.reset(new data::Logic(
 730                                 logic_channel_count));
 731                         assert(logic_data_);
 732                 }
 733         }
 734
 735         // Make the signals list
 736         for (shared_ptr<views::ViewBase> viewbase : views_) {
 737                 views::TraceView::View *trace_view =
 738                         qobject_cast<views::TraceView::View*>(viewbase.get());
 739
 740                 if (trace_view) {
 741                         unordered_set< shared_ptr<views::TraceView::Signal> >
 742                                 prev_sigs(trace_view->signals());
 743                         trace_view->clear_signals();
 744
 745                         for (auto channel : sr_dev->channels()) {
 746                                 shared_ptr<data::SignalBase> signalbase;
 747                                 shared_ptr<views::TraceView::Signal> signal;
 748
 749                                 // Find the channel in the old signals
 750                                 const auto iter = find_if(
 751                                         prev_sigs.cbegin(), prev_sigs.cend(),
 752                                         [&](const shared_ptr<views::TraceView::Signal> &s) {
 753                                                 return s->base()->channel() == channel;
 754                                         });
 755                                 if (iter != prev_sigs.end()) {
 756                                         // Copy the signal from the old set to the new
 757                                         signal = *iter;
 758                                         trace_view->add_signal(signal);
 759                                 } else {
 760                                         // Find the signalbase for this channel if possible
 761                                         signalbase.reset();
 762                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 763                                                 if (b->channel() == channel)
 764                                                         signalbase = b;
 765
 766                                         switch(channel->type()->id()) {
 767                                         case SR_CHANNEL_LOGIC:
 768                                                 if (!signalbase) {
 769                                                         signalbase = make_shared<data::SignalBase>(channel,
 770                                                                 data::SignalBase::LogicChannel);
 771                                                         signalbases_.insert(signalbase);
 772
 773                                                         all_signal_data_.insert(logic_data_);
 774                                                         signalbase->set_data(logic_data_);
 775
 776                                                         connect(this, SIGNAL(capture_state_changed(int)),
 777                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 778                                                 }
 779
 780                                                 signal = shared_ptr<views::TraceView::Signal>(
 781                                                         new views::TraceView::LogicSignal(*this,
 782                                                                 device_, signalbase));
 783                                                 trace_view->add_signal(signal);
 784                                                 break;
 785
 786                                         case SR_CHANNEL_ANALOG:
 787                                         {
 788                                                 if (!signalbase) {
 789                                                         signalbase = make_shared<data::SignalBase>(channel,
 790                                                                 data::SignalBase::AnalogChannel);
 791                                                         signalbases_.insert(signalbase);
 792
 793                                                         shared_ptr<data::Analog> data(new data::Analog());
 794                                                         all_signal_data_.insert(data);
 795                                                         signalbase->set_data(data);
 796
 797                                                         connect(this, SIGNAL(capture_state_changed(int)),
 798                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 799                                                 }
 800
 801                                                 signal = shared_ptr<views::TraceView::Signal>(
 802                                                         new views::TraceView::AnalogSignal(
 803                                                                 *this, signalbase));
 804                                                 trace_view->add_signal(signal);
 805                                                 break;
 806                                         }
 807
 808                                         default:
 809                                                 assert(false);
 810                                                 break;
 811                                         }
 812                                 }
 813                         }
 814                 }
 815         }
 816
 817         signals_changed();
 818 }
 819
 820 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 821         shared_ptr<sigrok::Channel> channel) const
 822 {
 823         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 824                 assert(sig);
 825                 if (sig->channel() == channel)
 826                         return sig;
 827         }
 828         return shared_ptr<data::SignalBase>();
 829 }
 830
 831 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 832 {
 833         assert(error_handler);
 834
 835         if (!device_)
 836                 return;
 837
 838         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 839
 840         out_of_memory_ = false;
 841
 842         try {
 843                 device_->start();
 844         } catch (Error e) {
 845                 error_handler(e.what());
 846                 return;
 847         }
 848
 849         set_capture_state(device_->session()->trigger() ?
 850                 AwaitingTrigger : Running);
 851
 852         try {
 853                 device_->run();
 854         } catch (Error e) {
 855                 error_handler(e.what());
 856                 set_capture_state(Stopped);
 857                 return;
 858         }
 859
 860         set_capture_state(Stopped);
 861
 862         // Confirm that SR_DF_END was received
 863         if (cur_logic_segment_) {
 864                 qDebug("SR_DF_END was not received.");
 865                 assert(false);
 866         }
 867
 868         // Optimize memory usage
 869         free_unused_memory();
 870
 871         // We now have unsaved data unless we just "captured" from a file
 872         shared_ptr<devices::File> file_device =
 873                 dynamic_pointer_cast<devices::File>(device_);
 874
 875         if (!file_device)
 876                 data_saved_ = false;
 877
 878         if (out_of_memory_)
 879                 error_handler(tr("Out of memory, acquisition stopped."));
 880 }
 881
 882 void Session::free_unused_memory()
 883 {
 884         for (shared_ptr<data::SignalData> data : all_signal_data_) {
 885                 const vector< shared_ptr<data::Segment> > segments = data->segments();
 886
 887                 for (shared_ptr<data::Segment> segment : segments) {
 888                         segment->free_unused_memory();
 889                 }
 890         }
 891 }
 892
 893 void Session::feed_in_header()
 894 {
 895         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 896 }
 897
 898 void Session::feed_in_meta(shared_ptr<Meta> meta)
 899 {
 900         for (auto entry : meta->config()) {
 901                 switch (entry.first->id()) {
 902                 case SR_CONF_SAMPLERATE:
 903                         // We can't rely on the header to always contain the sample rate,
 904                         // so in case it's supplied via a meta packet, we use it.
 905                         if (!cur_samplerate_)
 906                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 907
 908                         /// @todo handle samplerate changes
 909                         break;
 910                 default:
 911                         // Unknown metadata is not an error.
 912                         break;
 913                 }
 914         }
 915
 916         signals_changed();
 917 }
 918
 919 void Session::feed_in_trigger()
 920 {
 921         // The channel containing most samples should be most accurate
 922         uint64_t sample_count = 0;
 923
 924         {
 925                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 926                         assert(d);
 927                         uint64_t temp_count = 0;
 928
 929                         const vector< shared_ptr<pv::data::Segment> > segments =
 930                                 d->segments();
 931                         for (const shared_ptr<pv::data::Segment> &s : segments)
 932                                 temp_count += s->get_sample_count();
 933
 934                         if (temp_count > sample_count)
 935                                 sample_count = temp_count;
 936                 }
 937         }
 938
 939         trigger_event(sample_count / get_samplerate());
 940 }
 941
 942 void Session::feed_in_frame_begin()
 943 {
 944         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 945                 frame_began();
 946 }
 947
 948 void Session::feed_in_logic(shared_ptr<Logic> logic)
 949 {
 950         lock_guard<recursive_mutex> lock(data_mutex_);
 951
 952         if (!logic_data_) {
 953                 // The only reason logic_data_ would not have been created is
 954                 // if it was not possible to determine the signals when the
 955                 // device was created.
 956                 update_signals();
 957         }
 958
 959         if (!cur_logic_segment_) {
 960                 // This could be the first packet after a trigger
 961                 set_capture_state(Running);
 962
 963                 // Create a new data segment
 964                 cur_logic_segment_ = make_shared<data::LogicSegment>(
 965                         *logic_data_, logic->unit_size(), cur_samplerate_);
 966                 logic_data_->push_segment(cur_logic_segment_);
 967
 968                 // @todo Putting this here means that only listeners querying
 969                 // for logic will be notified. Currently the only user of
 970                 // frame_began is DecoderStack, but in future we need to signal
 971                 // this after both analog and logic sweeps have begun.
 972                 frame_began();
 973         }
 974
 975         cur_logic_segment_->append_payload(logic);
 976
 977         data_received();
 978 }
 979
 980 void Session::feed_in_analog(shared_ptr<Analog> analog)
 981 {
 982         lock_guard<recursive_mutex> lock(data_mutex_);
 983
 984         const vector<shared_ptr<Channel>> channels = analog->channels();
 985         const unsigned int channel_count = channels.size();
 986         const size_t sample_count = analog->num_samples() / channel_count;
 987         bool sweep_beginning = false;
 988
 989         unique_ptr<float> data(new float[analog->num_samples()]);
 990         analog->get_data_as_float(data.get());
 991
 992         if (signalbases_.empty())
 993                 update_signals();
 994
 995         float *channel_data = data.get();
 996         for (auto channel : channels) {
 997                 shared_ptr<data::AnalogSegment> segment;
 998
 999                 // Try to get the segment of the channel
1000                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
1001                         iterator iter = cur_analog_segments_.find(channel);
1002                 if (iter != cur_analog_segments_.end())
1003                         segment = (*iter).second;
1004                 else {
1005                         // If no segment was found, this means we haven't
1006                         // created one yet. i.e. this is the first packet
1007                         // in the sweep containing this segment.
1008                         sweep_beginning = true;
1009
1010                         // Find the analog data associated with the channel
1011                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1012                         assert(base);
1013
1014                         shared_ptr<data::Analog> data(base->analog_data());
1015                         assert(data);
1016
1017                         // Create a segment, keep it in the maps of channels
1018                         segment = make_shared<data::AnalogSegment>(
1019                                 *data, cur_samplerate_);
1020                         cur_analog_segments_[channel] = segment;
1021
1022                         // Push the segment into the analog data.
1023                         data->push_segment(segment);
1024                 }
1025
1026                 assert(segment);
1027
1028                 // Append the samples in the segment
1029                 segment->append_interleaved_samples(channel_data++, sample_count,
1030                         channel_count);
1031         }
1032
1033         if (sweep_beginning) {
1034                 // This could be the first packet after a trigger
1035                 set_capture_state(Running);
1036         }
1037
1038         data_received();
1039 }
1040
1041 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1042         shared_ptr<Packet> packet)
1043 {
1044         static bool frame_began = false;
1045
1046         (void)device;
1047
1048         assert(device);
1049         assert(device == device_->device());
1050         assert(packet);
1051
1052         switch (packet->type()->id()) {
1053         case SR_DF_HEADER:
1054                 feed_in_header();
1055                 break;
1056
1057         case SR_DF_META:
1058                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1059                 break;
1060
1061         case SR_DF_TRIGGER:
1062                 feed_in_trigger();
1063                 break;
1064
1065         case SR_DF_FRAME_BEGIN:
1066                 feed_in_frame_begin();
1067                 frame_began = true;
1068                 break;
1069
1070         case SR_DF_LOGIC:
1071                 try {
1072                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1073                 } catch (bad_alloc) {
1074                         out_of_memory_ = true;
1075                         device_->stop();
1076                 }
1077                 break;
1078
1079         case SR_DF_ANALOG:
1080                 try {
1081                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1082                 } catch (bad_alloc) {
1083                         out_of_memory_ = true;
1084                         device_->stop();
1085                 }
1086                 break;
1087
1088         case SR_DF_FRAME_END:
1089         case SR_DF_END:
1090         {
1091                 {
1092                         lock_guard<recursive_mutex> lock(data_mutex_);
1093                         cur_logic_segment_.reset();
1094                         cur_analog_segments_.clear();
1095                 }
1096                 if (frame_began) {
1097                         frame_began = false;
1098                         frame_ended();
1099                 }
1100                 break;
1101         }
1102         default:
1103                 break;
1104         }
1105 }
1106
1107 void Session::on_data_saved()
1108 {
1109         data_saved_ = true;
1110 }
1111
1112 } // namespace pv