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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifdef _WIN32
  22 // Windows: Avoid boost/thread namespace pollution (which includes windows.h).
  23 #define NOGDI
  24 #define NORESOURCE
  25 #endif
  26 #include <boost/thread/locks.hpp>
  27 #include <boost/thread/shared_mutex.hpp>
  28
  29 #include <QFileInfo>
  30
  31 #include <cassert>
  32 #include <mutex>
  33 #include <stdexcept>
  34
  35 #include <sys/stat.h>
  36
  37 #include "session.hpp"
  38 #include "devicemanager.hpp"
  39
  40 #include "data/analog.hpp"
  41 #include "data/analogsegment.hpp"
  42 #include "data/decoderstack.hpp"
  43 #include "data/logic.hpp"
  44 #include "data/logicsegment.hpp"
  45 #include "data/signalbase.hpp"
  46 #include "data/decode/decoder.hpp"
  47
  48 #include "devices/hardwaredevice.hpp"
  49 #include "devices/sessionfile.hpp"
  50
  51 #include "toolbars/mainbar.hpp"
  52
  53 #include "view/analogsignal.hpp"
  54 #include "view/decodetrace.hpp"
  55 #include "view/logicsignal.hpp"
  56 #include "view/signal.hpp"
  57 #include "view/view.hpp"
  58
  59 #include <libsigrokcxx/libsigrokcxx.hpp>
  60
  61 #ifdef ENABLE_DECODE
  62 #include <libsigrokdecode/libsigrokdecode.h>
  63 #endif
  64
  65 using boost::shared_lock;
  66 using boost::shared_mutex;
  67 using boost::unique_lock;
  68
  69 using std::dynamic_pointer_cast;
  70 using std::function;
  71 using std::lock_guard;
  72 using std::list;
  73 using std::map;
  74 using std::mutex;
  75 using std::recursive_mutex;
  76 using std::set;
  77 using std::shared_ptr;
  78 using std::string;
  79 using std::unordered_set;
  80 using std::vector;
  81
  82 using sigrok::Analog;
  83 using sigrok::Channel;
  84 using sigrok::ChannelType;
  85 using sigrok::ConfigKey;
  86 using sigrok::DatafeedCallbackFunction;
  87 using sigrok::Error;
  88 using sigrok::Header;
  89 using sigrok::Logic;
  90 using sigrok::Meta;
  91 using sigrok::Packet;
  92 using sigrok::PacketPayload;
  93 using sigrok::Session;
  94 using sigrok::SessionDevice;
  95
  96 using Glib::VariantBase;
  97 using Glib::Variant;
  98
  99 namespace pv {
 100 Session::Session(DeviceManager &device_manager, QString name) :
 101         device_manager_(device_manager),
 102         default_name_(name),
 103         name_(name),
 104         capture_state_(Stopped),
 105         cur_samplerate_(0)
 106 {
 107 }
 108
 109 Session::~Session()
 110 {
 111         // Stop and join to the thread
 112         stop_capture();
 113 }
 114
 115 DeviceManager& Session::device_manager()
 116 {
 117         return device_manager_;
 118 }
 119
 120 const DeviceManager& Session::device_manager() const
 121 {
 122         return device_manager_;
 123 }
 124
 125 shared_ptr<sigrok::Session> Session::session() const
 126 {
 127         if (!device_)
 128                 return shared_ptr<sigrok::Session>();
 129         return device_->session();
 130 }
 131
 132 shared_ptr<devices::Device> Session::device() const
 133 {
 134         return device_;
 135 }
 136
 137 QString Session::name() const
 138 {
 139         return name_;
 140 }
 141
 142 void Session::set_name(QString name)
 143 {
 144         if (default_name_.isEmpty())
 145                 default_name_ = name;
 146
 147         name_ = name;
 148
 149         name_changed();
 150 }
 151
 152 const std::list< std::shared_ptr<views::ViewBase> > Session::views() const
 153 {
 154         return views_;
 155 }
 156
 157 std::shared_ptr<views::ViewBase> Session::main_view() const
 158 {
 159         return main_view_;
 160 }
 161
 162 void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
 163 {
 164         main_bar_ = main_bar;
 165 }
 166
 167 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 168 {
 169         return main_bar_;
 170 }
 171
 172 void Session::save_settings(QSettings &settings) const
 173 {
 174         map<string, string> dev_info;
 175         list<string> key_list;
 176         int stacks = 0, views = 0;
 177
 178         if (device_) {
 179                 shared_ptr<devices::HardwareDevice> hw_device =
 180                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 181
 182                 if (hw_device) {
 183                         settings.setValue("device_type", "hardware");
 184                         settings.beginGroup("device");
 185
 186                         key_list.push_back("vendor");
 187                         key_list.push_back("model");
 188                         key_list.push_back("version");
 189                         key_list.push_back("serial_num");
 190                         key_list.push_back("connection_id");
 191
 192                         dev_info = device_manager_.get_device_info(device_);
 193
 194                         for (string key : key_list) {
 195                                 if (dev_info.count(key))
 196                                         settings.setValue(QString::fromUtf8(key.c_str()),
 197                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 198                                 else
 199                                         settings.remove(QString::fromUtf8(key.c_str()));
 200                         }
 201
 202                         settings.endGroup();
 203                 }
 204
 205                 shared_ptr<devices::SessionFile> sessionfile_device =
 206                         dynamic_pointer_cast< devices::SessionFile >(device_);
 207
 208                 if (sessionfile_device) {
 209                         settings.setValue("device_type", "sessionfile");
 210                         settings.beginGroup("device");
 211                         settings.setValue("filename", QString::fromStdString(
 212                                 sessionfile_device->full_name()));
 213                         settings.endGroup();
 214                 }
 215
 216                 // Save channels and decoders
 217                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 218 #ifdef ENABLE_DECODE
 219                         if (base->is_decode_signal()) {
 220                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 221                                                 base->decoder_stack();
 222                                 std::shared_ptr<data::decode::Decoder> top_decoder =
 223                                                 decoder_stack->stack().front();
 224
 225                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 226                                 settings.setValue("id", top_decoder->decoder()->id);
 227                                 settings.setValue("name", top_decoder->decoder()->name);
 228                                 settings.endGroup();
 229                         } else
 230 #endif
 231                         {
 232                                 settings.beginGroup(base->internal_name());
 233                                 base->save_settings(settings);
 234                                 settings.endGroup();
 235                         }
 236                 }
 237
 238                 settings.setValue("decoder_stacks", stacks);
 239
 240                 // Save view states and their signal settings
 241                 // Note: main_view must be saved as view0
 242                 settings.beginGroup("view" + QString::number(views++));
 243                 main_view_->save_settings(settings);
 244                 settings.endGroup();
 245
 246                 for (shared_ptr<views::ViewBase> view : views_) {
 247                         if (view != main_view_) {
 248                                 settings.beginGroup("view" + QString::number(views++));
 249                                 view->save_settings(settings);
 250                                 settings.endGroup();
 251                         }
 252                 }
 253
 254                 settings.setValue("views", views);
 255         }
 256 }
 257
 258 void Session::restore_settings(QSettings &settings)
 259 {
 260         shared_ptr<devices::Device> device;
 261
 262         QString device_type = settings.value("device_type").toString();
 263
 264         if (device_type == "hardware") {
 265                 map<string, string> dev_info;
 266                 list<string> key_list;
 267
 268                 // Re-select last used device if possible but only if it's not demo
 269                 settings.beginGroup("device");
 270                 key_list.push_back("vendor");
 271                 key_list.push_back("model");
 272                 key_list.push_back("version");
 273                 key_list.push_back("serial_num");
 274                 key_list.push_back("connection_id");
 275
 276                 for (string key : key_list) {
 277                         const QString k = QString::fromStdString(key);
 278                         if (!settings.contains(k))
 279                                 continue;
 280
 281                         const string value = settings.value(k).toString().toStdString();
 282                         if (!value.empty())
 283                                 dev_info.insert(std::make_pair(key, value));
 284                 }
 285
 286                 if (dev_info.count("model") > 0)
 287                         device = device_manager_.find_device_from_info(dev_info);
 288
 289                 if (device)
 290                         set_device(device);
 291
 292                 settings.endGroup();
 293         }
 294
 295         if (device_type == "sessionfile") {
 296                 settings.beginGroup("device");
 297                 QString filename = settings.value("filename").toString();
 298                 settings.endGroup();
 299
 300                 if (QFileInfo(filename).isReadable()) {
 301                         device = std::make_shared<devices::SessionFile>(device_manager_.context(),
 302                                 filename.toStdString());
 303                         set_device(device);
 304
 305                         // TODO Perform error handling
 306                         start_capture([](QString infoMessage) { (void)infoMessage; });
 307
 308                         set_name(QFileInfo(filename).fileName());
 309                 }
 310         }
 311
 312         if (device) {
 313                 // Restore channels
 314                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 315                         settings.beginGroup(base->internal_name());
 316                         base->restore_settings(settings);
 317                         settings.endGroup();
 318                 }
 319
 320                 // Restore decoders
 321 #ifdef ENABLE_DECODE
 322                 int stacks = settings.value("decoder_stacks").toInt();
 323
 324                 for (int i = 0; i < stacks; i++) {
 325                         settings.beginGroup("decoder_stack" + QString::number(i++));
 326
 327                         QString id = settings.value("id").toString();
 328                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 329
 330                         settings.endGroup();
 331                 }
 332 #endif
 333
 334                 // Restore views
 335                 int views = settings.value("views").toInt();
 336
 337                 for (int i = 0; i < views; i++) {
 338                         settings.beginGroup("view" + QString::number(i));
 339
 340                         if (i > 0) {
 341                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 342                                 add_view(name_, type, this);
 343                                 views_.back()->restore_settings(settings);
 344                         } else
 345                                 main_view_->restore_settings(settings);
 346
 347                         settings.endGroup();
 348                 }
 349         }
 350 }
 351
 352 void Session::set_device(shared_ptr<devices::Device> device)
 353 {
 354         assert(device);
 355
 356         // Ensure we are not capturing before setting the device
 357         stop_capture();
 358
 359         if (device_)
 360                 device_->close();
 361
 362         device_.reset();
 363
 364         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 365         name_ = default_name_;
 366         name_changed();
 367
 368         // Remove all stored data
 369         for (std::shared_ptr<views::ViewBase> view : views_) {
 370                 view->clear_signals();
 371 #ifdef ENABLE_DECODE
 372                 view->clear_decode_signals();
 373 #endif
 374         }
 375         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 376                 d->clear();
 377         all_signal_data_.clear();
 378         signalbases_.clear();
 379         cur_logic_segment_.reset();
 380
 381         for (auto entry : cur_analog_segments_) {
 382                 shared_ptr<sigrok::Channel>(entry.first).reset();
 383                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 384         }
 385
 386         logic_data_.reset();
 387
 388         signals_changed();
 389
 390         device_ = std::move(device);
 391
 392         try {
 393                 device_->open();
 394         } catch (const QString &e) {
 395                 device_.reset();
 396                 device_changed();
 397                 throw;
 398         }
 399
 400         device_->session()->add_datafeed_callback([=]
 401                 (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 402                         data_feed_in(device, packet);
 403                 });
 404
 405         update_signals();
 406         device_changed();
 407 }
 408
 409 void Session::set_default_device()
 410 {
 411         const list< shared_ptr<devices::HardwareDevice> > &devices =
 412                 device_manager_.devices();
 413
 414         if (devices.empty())
 415                 return;
 416
 417         // Try and find the demo device and select that by default
 418         const auto iter = std::find_if(devices.begin(), devices.end(),
 419                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 420                         return d->hardware_device()->driver()->name() ==
 421                         "demo"; });
 422         set_device((iter == devices.end()) ? devices.front() : *iter);
 423 }
 424
 425 Session::capture_state Session::get_capture_state() const
 426 {
 427         lock_guard<mutex> lock(sampling_mutex_);
 428         return capture_state_;
 429 }
 430
 431 void Session::start_capture(function<void (const QString)> error_handler)
 432 {
 433         if (!device_) {
 434                 error_handler(tr("No active device set, can't start acquisition."));
 435                 return;
 436         }
 437
 438         stop_capture();
 439
 440         // Check that at least one channel is enabled
 441         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 442         if (sr_dev) {
 443                 const auto channels = sr_dev->channels();
 444                 if (!std::any_of(channels.begin(), channels.end(),
 445                         [](shared_ptr<Channel> channel) {
 446                                 return channel->enabled(); })) {
 447                         error_handler(tr("No channels enabled."));
 448                         return;
 449                 }
 450         }
 451
 452         // Clear signal data
 453         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 454                 d->clear();
 455
 456         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 457         name_ = default_name_;
 458         name_changed();
 459
 460         // Begin the session
 461         sampling_thread_ = std::thread(
 462                 &Session::sample_thread_proc, this, error_handler);
 463 }
 464
 465 void Session::stop_capture()
 466 {
 467         if (get_capture_state() != Stopped)
 468                 device_->stop();
 469
 470         // Check that sampling stopped
 471         if (sampling_thread_.joinable())
 472                 sampling_thread_.join();
 473 }
 474
 475 void Session::register_view(std::shared_ptr<views::ViewBase> view)
 476 {
 477         if (views_.empty()) {
 478                 main_view_ = view;
 479         }
 480
 481         views_.push_back(view);
 482
 483         update_signals();
 484 }
 485
 486 void Session::deregister_view(std::shared_ptr<views::ViewBase> view)
 487 {
 488         views_.remove_if([&](std::shared_ptr<views::ViewBase> v) {
 489                 return v == view; });
 490
 491         if (views_.empty()) {
 492                 main_view_.reset();
 493
 494                 // Without a view there can be no main bar
 495                 main_bar_.reset();
 496         }
 497 }
 498
 499 bool Session::has_view(std::shared_ptr<views::ViewBase> view)
 500 {
 501         for (std::shared_ptr<views::ViewBase> v : views_)
 502                 if (v == view)
 503                         return true;
 504
 505         return false;
 506 }
 507
 508 double Session::get_samplerate() const
 509 {
 510         double samplerate = 0.0;
 511
 512         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 513                 assert(d);
 514                 const vector< shared_ptr<pv::data::Segment> > segments =
 515                         d->segments();
 516                 for (const shared_ptr<pv::data::Segment> &s : segments)
 517                         samplerate = std::max(samplerate, s->samplerate());
 518         }
 519         // If there is no sample rate given we use samples as unit
 520         if (samplerate == 0.0)
 521                 samplerate = 1.0;
 522
 523         return samplerate;
 524 }
 525
 526 const std::unordered_set< std::shared_ptr<data::SignalBase> >
 527         Session::signalbases() const
 528 {
 529         return signalbases_;
 530 }
 531
 532 #ifdef ENABLE_DECODE
 533 bool Session::add_decoder(srd_decoder *const dec)
 534 {
 535         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 536         shared_ptr<data::DecoderStack> decoder_stack;
 537
 538         try {
 539                 // Create the decoder
 540                 decoder_stack = shared_ptr<data::DecoderStack>(
 541                         new data::DecoderStack(*this, dec));
 542
 543                 // Make a list of all the channels
 544                 std::vector<const srd_channel*> all_channels;
 545                 for (const GSList *i = dec->channels; i; i = i->next)
 546                         all_channels.push_back((const srd_channel*)i->data);
 547                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 548                         all_channels.push_back((const srd_channel*)i->data);
 549
 550                 // Auto select the initial channels
 551                 for (const srd_channel *pdch : all_channels)
 552                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 553                                 if (b->type() == ChannelType::LOGIC) {
 554                                         if (QString::fromUtf8(pdch->name).toLower().
 555                                                 contains(b->name().toLower()))
 556                                                 channels[pdch] = b;
 557                                 }
 558                         }
 559
 560                 assert(decoder_stack);
 561                 assert(!decoder_stack->stack().empty());
 562                 assert(decoder_stack->stack().front());
 563                 decoder_stack->stack().front()->set_channels(channels);
 564
 565                 // Create the decode signal
 566                 shared_ptr<data::SignalBase> signalbase =
 567                         shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
 568
 569                 signalbase->set_decoder_stack(decoder_stack);
 570                 signalbases_.insert(signalbase);
 571
 572                 for (std::shared_ptr<views::ViewBase> view : views_)
 573                         view->add_decode_signal(signalbase);
 574         } catch (std::runtime_error e) {
 575                 return false;
 576         }
 577
 578         signals_changed();
 579
 580         // Do an initial decode
 581         decoder_stack->begin_decode();
 582
 583         return true;
 584 }
 585
 586 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 587 {
 588         for (std::shared_ptr<views::ViewBase> view : views_)
 589                 view->remove_decode_signal(signalbase);
 590 }
 591 #endif
 592
 593 void Session::set_capture_state(capture_state state)
 594 {
 595         bool changed;
 596
 597         {
 598                 lock_guard<mutex> lock(sampling_mutex_);
 599                 changed = capture_state_ != state;
 600                 capture_state_ = state;
 601         }
 602
 603         if (changed)
 604                 capture_state_changed(state);
 605 }
 606
 607 void Session::update_signals()
 608 {
 609         if (!device_) {
 610                 signalbases_.clear();
 611                 logic_data_.reset();
 612                 for (std::shared_ptr<views::ViewBase> view : views_) {
 613                         view->clear_signals();
 614 #ifdef ENABLE_DECODE
 615                         view->clear_decode_signals();
 616 #endif
 617                 }
 618                 return;
 619         }
 620
 621         lock_guard<recursive_mutex> lock(data_mutex_);
 622
 623         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 624         if (!sr_dev) {
 625                 signalbases_.clear();
 626                 logic_data_.reset();
 627                 for (std::shared_ptr<views::ViewBase> view : views_) {
 628                         view->clear_signals();
 629 #ifdef ENABLE_DECODE
 630                         view->clear_decode_signals();
 631 #endif
 632                 }
 633                 return;
 634         }
 635
 636         // Detect what data types we will receive
 637         auto channels = sr_dev->channels();
 638         unsigned int logic_channel_count = std::count_if(
 639                 channels.begin(), channels.end(),
 640                 [] (shared_ptr<Channel> channel) {
 641                         return channel->type() == ChannelType::LOGIC; });
 642
 643         // Create data containers for the logic data segments
 644         {
 645                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 646
 647                 if (logic_channel_count == 0) {
 648                         logic_data_.reset();
 649                 } else if (!logic_data_ ||
 650                         logic_data_->num_channels() != logic_channel_count) {
 651                         logic_data_.reset(new data::Logic(
 652                                 logic_channel_count));
 653                         assert(logic_data_);
 654                 }
 655         }
 656
 657         // Make the signals list
 658         for (std::shared_ptr<views::ViewBase> viewbase : views_) {
 659                 views::TraceView::View *trace_view =
 660                         qobject_cast<views::TraceView::View*>(viewbase.get());
 661
 662                 if (trace_view) {
 663                         unordered_set< shared_ptr<views::TraceView::Signal> >
 664                                 prev_sigs(trace_view->signals());
 665                         trace_view->clear_signals();
 666
 667                         for (auto channel : sr_dev->channels()) {
 668                                 shared_ptr<data::SignalBase> signalbase;
 669                                 shared_ptr<views::TraceView::Signal> signal;
 670
 671                                 // Find the channel in the old signals
 672                                 const auto iter = std::find_if(
 673                                         prev_sigs.cbegin(), prev_sigs.cend(),
 674                                         [&](const shared_ptr<views::TraceView::Signal> &s) {
 675                                                 return s->base()->channel() == channel;
 676                                         });
 677                                 if (iter != prev_sigs.end()) {
 678                                         // Copy the signal from the old set to the new
 679                                         signal = *iter;
 680                                         trace_view->add_signal(signal);
 681                                 } else {
 682                                         // Find the signalbase for this channel if possible
 683                                         signalbase.reset();
 684                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 685                                                 if (b->channel() == channel)
 686                                                         signalbase = b;
 687
 688                                         switch(channel->type()->id()) {
 689                                         case SR_CHANNEL_LOGIC:
 690                                                 if (!signalbase) {
 691                                                         signalbase = shared_ptr<data::SignalBase>(
 692                                                                 new data::SignalBase(channel));
 693                                                         signalbases_.insert(signalbase);
 694
 695                                                         all_signal_data_.insert(logic_data_);
 696                                                         signalbase->set_data(logic_data_);
 697                                                 }
 698
 699                                                 signal = shared_ptr<views::TraceView::Signal>(
 700                                                         new views::TraceView::LogicSignal(*this,
 701                                                                 device_, signalbase));
 702                                                 trace_view->add_signal(signal);
 703                                                 break;
 704
 705                                         case SR_CHANNEL_ANALOG:
 706                                         {
 707                                                 if (!signalbase) {
 708                                                         signalbase = shared_ptr<data::SignalBase>(
 709                                                                 new data::SignalBase(channel));
 710                                                         signalbases_.insert(signalbase);
 711
 712                                                         shared_ptr<data::Analog> data(new data::Analog());
 713                                                         all_signal_data_.insert(data);
 714                                                         signalbase->set_data(data);
 715                                                 }
 716
 717                                                 signal = shared_ptr<views::TraceView::Signal>(
 718                                                         new views::TraceView::AnalogSignal(
 719                                                                 *this, signalbase));
 720                                                 trace_view->add_signal(signal);
 721                                                 break;
 722                                         }
 723
 724                                         default:
 725                                                 assert(0);
 726                                                 break;
 727                                         }
 728                                 }
 729                         }
 730                 }
 731         }
 732
 733         signals_changed();
 734 }
 735
 736 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 737         shared_ptr<sigrok::Channel> channel) const
 738 {
 739         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 740                 assert(sig);
 741                 if (sig->channel() == channel)
 742                         return sig;
 743         }
 744         return shared_ptr<data::SignalBase>();
 745 }
 746
 747 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 748 {
 749         assert(error_handler);
 750
 751         if (!device_)
 752                 return;
 753
 754         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 755
 756         out_of_memory_ = false;
 757
 758         try {
 759                 device_->start();
 760         } catch (Error e) {
 761                 error_handler(e.what());
 762                 return;
 763         }
 764
 765         set_capture_state(device_->session()->trigger() ?
 766                 AwaitingTrigger : Running);
 767
 768         device_->run();
 769         set_capture_state(Stopped);
 770
 771         // Confirm that SR_DF_END was received
 772         if (cur_logic_segment_) {
 773                 qDebug("SR_DF_END was not received.");
 774                 assert(0);
 775         }
 776
 777         if (out_of_memory_)
 778                 error_handler(tr("Out of memory, acquisition stopped."));
 779 }
 780
 781 void Session::feed_in_header()
 782 {
 783         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 784 }
 785
 786 void Session::feed_in_meta(shared_ptr<Meta> meta)
 787 {
 788         for (auto entry : meta->config()) {
 789                 switch (entry.first->id()) {
 790                 case SR_CONF_SAMPLERATE:
 791                         // We can't rely on the header to always contain the sample rate,
 792                         // so in case it's supplied via a meta packet, we use it.
 793                         if (!cur_samplerate_)
 794                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 795
 796                         /// @todo handle samplerate changes
 797                         break;
 798                 default:
 799                         // Unknown metadata is not an error.
 800                         break;
 801                 }
 802         }
 803
 804         signals_changed();
 805 }
 806
 807 void Session::feed_in_trigger()
 808 {
 809         // The channel containing most samples should be most accurate
 810         uint64_t sample_count = 0;
 811
 812         {
 813                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 814                         assert(d);
 815                         uint64_t temp_count = 0;
 816
 817                         const vector< shared_ptr<pv::data::Segment> > segments =
 818                                 d->segments();
 819                         for (const shared_ptr<pv::data::Segment> &s : segments)
 820                                 temp_count += s->get_sample_count();
 821
 822                         if (temp_count > sample_count)
 823                                 sample_count = temp_count;
 824                 }
 825         }
 826
 827         trigger_event(sample_count / get_samplerate());
 828 }
 829
 830 void Session::feed_in_frame_begin()
 831 {
 832         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 833                 frame_began();
 834 }
 835
 836 void Session::feed_in_logic(shared_ptr<Logic> logic)
 837 {
 838         lock_guard<recursive_mutex> lock(data_mutex_);
 839
 840         const size_t sample_count = logic->data_length() / logic->unit_size();
 841
 842         if (!logic_data_) {
 843                 // The only reason logic_data_ would not have been created is
 844                 // if it was not possible to determine the signals when the
 845                 // device was created.
 846                 update_signals();
 847         }
 848
 849         if (!cur_logic_segment_) {
 850                 // This could be the first packet after a trigger
 851                 set_capture_state(Running);
 852
 853                 // Create a new data segment
 854                 cur_logic_segment_ = shared_ptr<data::LogicSegment>(
 855                         new data::LogicSegment(
 856                                 logic, cur_samplerate_, sample_count));
 857                 logic_data_->push_segment(cur_logic_segment_);
 858
 859                 // @todo Putting this here means that only listeners querying
 860                 // for logic will be notified. Currently the only user of
 861                 // frame_began is DecoderStack, but in future we need to signal
 862                 // this after both analog and logic sweeps have begun.
 863                 frame_began();
 864         } else {
 865                 // Append to the existing data segment
 866                 cur_logic_segment_->append_payload(logic);
 867         }
 868
 869         data_received();
 870 }
 871
 872 void Session::feed_in_analog(shared_ptr<Analog> analog)
 873 {
 874         lock_guard<recursive_mutex> lock(data_mutex_);
 875
 876         const vector<shared_ptr<Channel>> channels = analog->channels();
 877         const unsigned int channel_count = channels.size();
 878         const size_t sample_count = analog->num_samples() / channel_count;
 879         const float *data = static_cast<const float *>(analog->data_pointer());
 880         bool sweep_beginning = false;
 881
 882         if (signalbases_.empty())
 883                 update_signals();
 884
 885         for (auto channel : channels) {
 886                 shared_ptr<data::AnalogSegment> segment;
 887
 888                 // Try to get the segment of the channel
 889                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 890                         iterator iter = cur_analog_segments_.find(channel);
 891                 if (iter != cur_analog_segments_.end())
 892                         segment = (*iter).second;
 893                 else {
 894                         // If no segment was found, this means we haven't
 895                         // created one yet. i.e. this is the first packet
 896                         // in the sweep containing this segment.
 897                         sweep_beginning = true;
 898
 899                         // Create a segment, keep it in the maps of channels
 900                         segment = shared_ptr<data::AnalogSegment>(
 901                                 new data::AnalogSegment(
 902                                         cur_samplerate_, sample_count));
 903                         cur_analog_segments_[channel] = segment;
 904
 905                         // Find the analog data associated with the channel
 906                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 907                         assert(base);
 908
 909                         shared_ptr<data::Analog> data(base->analog_data());
 910                         assert(data);
 911
 912                         // Push the segment into the analog data.
 913                         data->push_segment(segment);
 914                 }
 915
 916                 assert(segment);
 917
 918                 // Append the samples in the segment
 919                 segment->append_interleaved_samples(data++, sample_count,
 920                         channel_count);
 921         }
 922
 923         if (sweep_beginning) {
 924                 // This could be the first packet after a trigger
 925                 set_capture_state(Running);
 926         }
 927
 928         data_received();
 929 }
 930
 931 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
 932         shared_ptr<Packet> packet)
 933 {
 934         (void)device;
 935
 936         assert(device);
 937         assert(device == device_->device());
 938         assert(packet);
 939
 940         switch (packet->type()->id()) {
 941         case SR_DF_HEADER:
 942                 feed_in_header();
 943                 break;
 944
 945         case SR_DF_META:
 946                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
 947                 break;
 948
 949         case SR_DF_TRIGGER:
 950                 feed_in_trigger();
 951                 break;
 952
 953         case SR_DF_FRAME_BEGIN:
 954                 feed_in_frame_begin();
 955                 break;
 956
 957         case SR_DF_LOGIC:
 958                 try {
 959                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
 960                 } catch (std::bad_alloc) {
 961                         out_of_memory_ = true;
 962                         device_->stop();
 963                 }
 964                 break;
 965
 966         case SR_DF_ANALOG:
 967                 try {
 968                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
 969                 } catch (std::bad_alloc) {
 970                         out_of_memory_ = true;
 971                         device_->stop();
 972                 }
 973                 break;
 974
 975         case SR_DF_END:
 976         {
 977                 {
 978                         lock_guard<recursive_mutex> lock(data_mutex_);
 979                         cur_logic_segment_.reset();
 980                         cur_analog_segments_.clear();
 981                 }
 982                 frame_ended();
 983                 break;
 984         }
 985         default:
 986                 break;
 987         }
 988 }
 989
 990 } // namespace pv