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/inputfile.hpp"
  50 #include "devices/sessionfile.hpp"
  51
  52 #include "toolbars/mainbar.hpp"
  53
  54 #include "view/analogsignal.hpp"
  55 #include "view/decodetrace.hpp"
  56 #include "view/logicsignal.hpp"
  57 #include "view/signal.hpp"
  58 #include "view/view.hpp"
  59
  60 #include <libsigrokcxx/libsigrokcxx.hpp>
  61
  62 #ifdef ENABLE_DECODE
  63 #include <libsigrokdecode/libsigrokdecode.h>
  64 #endif
  65
  66 using boost::shared_lock;
  67 using boost::shared_mutex;
  68 using boost::unique_lock;
  69
  70 using std::dynamic_pointer_cast;
  71 using std::function;
  72 using std::lock_guard;
  73 using std::list;
  74 using std::map;
  75 using std::mutex;
  76 using std::pair;
  77 using std::recursive_mutex;
  78 using std::set;
  79 using std::shared_ptr;
  80 using std::string;
  81 using std::unordered_set;
  82 using std::vector;
  83
  84 using sigrok::Analog;
  85 using sigrok::Channel;
  86 using sigrok::ChannelType;
  87 using sigrok::ConfigKey;
  88 using sigrok::DatafeedCallbackFunction;
  89 using sigrok::Error;
  90 using sigrok::Header;
  91 using sigrok::InputFormat;
  92 using sigrok::Logic;
  93 using sigrok::Meta;
  94 using sigrok::OutputFormat;
  95 using sigrok::Packet;
  96 using sigrok::PacketPayload;
  97 using sigrok::Session;
  98 using sigrok::SessionDevice;
  99
 100 using Glib::VariantBase;
 101 using Glib::Variant;
 102
 103 namespace pv {
 104 Session::Session(DeviceManager &device_manager, QString name) :
 105         device_manager_(device_manager),
 106         default_name_(name),
 107         name_(name),
 108         capture_state_(Stopped),
 109         cur_samplerate_(0)
 110 {
 111 }
 112
 113 Session::~Session()
 114 {
 115         // Stop and join to the thread
 116         stop_capture();
 117 }
 118
 119 DeviceManager& Session::device_manager()
 120 {
 121         return device_manager_;
 122 }
 123
 124 const DeviceManager& Session::device_manager() const
 125 {
 126         return device_manager_;
 127 }
 128
 129 shared_ptr<sigrok::Session> Session::session() const
 130 {
 131         if (!device_)
 132                 return shared_ptr<sigrok::Session>();
 133         return device_->session();
 134 }
 135
 136 shared_ptr<devices::Device> Session::device() const
 137 {
 138         return device_;
 139 }
 140
 141 QString Session::name() const
 142 {
 143         return name_;
 144 }
 145
 146 void Session::set_name(QString name)
 147 {
 148         if (default_name_.isEmpty())
 149                 default_name_ = name;
 150
 151         name_ = name;
 152
 153         name_changed();
 154 }
 155
 156 const std::list< std::shared_ptr<views::ViewBase> > Session::views() const
 157 {
 158         return views_;
 159 }
 160
 161 std::shared_ptr<views::ViewBase> Session::main_view() const
 162 {
 163         return main_view_;
 164 }
 165
 166 void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
 167 {
 168         main_bar_ = main_bar;
 169 }
 170
 171 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 172 {
 173         return main_bar_;
 174 }
 175
 176 void Session::save_settings(QSettings &settings) const
 177 {
 178         map<string, string> dev_info;
 179         list<string> key_list;
 180         int stacks = 0, views = 0;
 181
 182         if (device_) {
 183                 shared_ptr<devices::HardwareDevice> hw_device =
 184                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 185
 186                 if (hw_device) {
 187                         settings.setValue("device_type", "hardware");
 188                         settings.beginGroup("device");
 189
 190                         key_list.push_back("vendor");
 191                         key_list.push_back("model");
 192                         key_list.push_back("version");
 193                         key_list.push_back("serial_num");
 194                         key_list.push_back("connection_id");
 195
 196                         dev_info = device_manager_.get_device_info(device_);
 197
 198                         for (string key : key_list) {
 199                                 if (dev_info.count(key))
 200                                         settings.setValue(QString::fromUtf8(key.c_str()),
 201                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 202                                 else
 203                                         settings.remove(QString::fromUtf8(key.c_str()));
 204                         }
 205
 206                         settings.endGroup();
 207                 }
 208
 209                 shared_ptr<devices::SessionFile> sessionfile_device =
 210                         dynamic_pointer_cast< devices::SessionFile >(device_);
 211
 212                 if (sessionfile_device) {
 213                         settings.setValue("device_type", "sessionfile");
 214                         settings.beginGroup("device");
 215                         settings.setValue("filename", QString::fromStdString(
 216                                 sessionfile_device->full_name()));
 217                         settings.endGroup();
 218                 }
 219
 220                 // Save channels and decoders
 221                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 222 #ifdef ENABLE_DECODE
 223                         if (base->is_decode_signal()) {
 224                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 225                                                 base->decoder_stack();
 226                                 std::shared_ptr<data::decode::Decoder> top_decoder =
 227                                                 decoder_stack->stack().front();
 228
 229                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 230                                 settings.setValue("id", top_decoder->decoder()->id);
 231                                 settings.setValue("name", top_decoder->decoder()->name);
 232                                 settings.endGroup();
 233                         } else
 234 #endif
 235                         {
 236                                 settings.beginGroup(base->internal_name());
 237                                 base->save_settings(settings);
 238                                 settings.endGroup();
 239                         }
 240                 }
 241
 242                 settings.setValue("decoder_stacks", stacks);
 243
 244                 // Save view states and their signal settings
 245                 // Note: main_view must be saved as view0
 246                 settings.beginGroup("view" + QString::number(views++));
 247                 main_view_->save_settings(settings);
 248                 settings.endGroup();
 249
 250                 for (shared_ptr<views::ViewBase> view : views_) {
 251                         if (view != main_view_) {
 252                                 settings.beginGroup("view" + QString::number(views++));
 253                                 view->save_settings(settings);
 254                                 settings.endGroup();
 255                         }
 256                 }
 257
 258                 settings.setValue("views", views);
 259         }
 260 }
 261
 262 void Session::restore_settings(QSettings &settings)
 263 {
 264         shared_ptr<devices::Device> device;
 265
 266         QString device_type = settings.value("device_type").toString();
 267
 268         if (device_type == "hardware") {
 269                 map<string, string> dev_info;
 270                 list<string> key_list;
 271
 272                 // Re-select last used device if possible but only if it's not demo
 273                 settings.beginGroup("device");
 274                 key_list.push_back("vendor");
 275                 key_list.push_back("model");
 276                 key_list.push_back("version");
 277                 key_list.push_back("serial_num");
 278                 key_list.push_back("connection_id");
 279
 280                 for (string key : key_list) {
 281                         const QString k = QString::fromStdString(key);
 282                         if (!settings.contains(k))
 283                                 continue;
 284
 285                         const string value = settings.value(k).toString().toStdString();
 286                         if (!value.empty())
 287                                 dev_info.insert(std::make_pair(key, value));
 288                 }
 289
 290                 if (dev_info.count("model") > 0)
 291                         device = device_manager_.find_device_from_info(dev_info);
 292
 293                 if (device)
 294                         set_device(device);
 295
 296                 settings.endGroup();
 297         }
 298
 299         if (device_type == "sessionfile") {
 300                 settings.beginGroup("device");
 301                 QString filename = settings.value("filename").toString();
 302                 settings.endGroup();
 303
 304                 if (QFileInfo(filename).isReadable()) {
 305                         device = std::make_shared<devices::SessionFile>(device_manager_.context(),
 306                                 filename.toStdString());
 307                         set_device(device);
 308
 309                         // TODO Perform error handling
 310                         start_capture([](QString infoMessage) { (void)infoMessage; });
 311
 312                         set_name(QFileInfo(filename).fileName());
 313                 }
 314         }
 315
 316         if (device) {
 317                 // Restore channels
 318                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 319                         settings.beginGroup(base->internal_name());
 320                         base->restore_settings(settings);
 321                         settings.endGroup();
 322                 }
 323
 324                 // Restore decoders
 325 #ifdef ENABLE_DECODE
 326                 int stacks = settings.value("decoder_stacks").toInt();
 327
 328                 for (int i = 0; i < stacks; i++) {
 329                         settings.beginGroup("decoder_stack" + QString::number(i++));
 330
 331                         QString id = settings.value("id").toString();
 332                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 333
 334                         settings.endGroup();
 335                 }
 336 #endif
 337
 338                 // Restore views
 339                 int views = settings.value("views").toInt();
 340
 341                 for (int i = 0; i < views; i++) {
 342                         settings.beginGroup("view" + QString::number(i));
 343
 344                         if (i > 0) {
 345                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 346                                 add_view(name_, type, this);
 347                                 views_.back()->restore_settings(settings);
 348                         } else
 349                                 main_view_->restore_settings(settings);
 350
 351                         settings.endGroup();
 352                 }
 353         }
 354 }
 355
 356 void Session::select_device(shared_ptr<devices::Device> device)
 357 {
 358         try {
 359                 if (device)
 360                         set_device(device);
 361                 else
 362                         set_default_device();
 363         } catch (const QString &e) {
 364                 main_bar_->session_error(tr("Failed to Select Device"),
 365                         tr("Failed to Select Device"));
 366         }
 367 }
 368
 369 void Session::set_device(shared_ptr<devices::Device> device)
 370 {
 371         assert(device);
 372
 373         // Ensure we are not capturing before setting the device
 374         stop_capture();
 375
 376         if (device_)
 377                 device_->close();
 378
 379         device_.reset();
 380
 381         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 382         name_ = default_name_;
 383         name_changed();
 384
 385         // Remove all stored data
 386         for (std::shared_ptr<views::ViewBase> view : views_) {
 387                 view->clear_signals();
 388 #ifdef ENABLE_DECODE
 389                 view->clear_decode_signals();
 390 #endif
 391         }
 392         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 393                 d->clear();
 394         all_signal_data_.clear();
 395         signalbases_.clear();
 396         cur_logic_segment_.reset();
 397
 398         for (auto entry : cur_analog_segments_) {
 399                 shared_ptr<sigrok::Channel>(entry.first).reset();
 400                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 401         }
 402
 403         logic_data_.reset();
 404
 405         signals_changed();
 406
 407         device_ = std::move(device);
 408
 409         try {
 410                 device_->open();
 411         } catch (const QString &e) {
 412                 device_.reset();
 413                 device_changed();
 414                 throw;
 415         }
 416
 417         device_->session()->add_datafeed_callback([=]
 418                 (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 419                         data_feed_in(device, packet);
 420                 });
 421
 422         update_signals();
 423         device_changed();
 424 }
 425
 426 void Session::set_default_device()
 427 {
 428         const list< shared_ptr<devices::HardwareDevice> > &devices =
 429                 device_manager_.devices();
 430
 431         if (devices.empty())
 432                 return;
 433
 434         // Try and find the demo device and select that by default
 435         const auto iter = std::find_if(devices.begin(), devices.end(),
 436                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 437                         return d->hardware_device()->driver()->name() ==
 438                         "demo"; });
 439         set_device((iter == devices.end()) ? devices.front() : *iter);
 440 }
 441
 442 void Session::load_init_file(const std::string &file_name,
 443         const std::string &format)
 444 {
 445         shared_ptr<InputFormat> input_format;
 446
 447         if (!format.empty()) {
 448                 const map<string, shared_ptr<InputFormat> > formats =
 449                         device_manager_.context()->input_formats();
 450                 const auto iter = find_if(formats.begin(), formats.end(),
 451                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 452                                 return f.first == format; });
 453                 if (iter == formats.end()) {
 454                         main_bar_->session_error(tr("Error"),
 455                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 456                         return;
 457                 }
 458
 459                 input_format = (*iter).second;
 460         }
 461
 462         load_file(QString::fromStdString(file_name), input_format);
 463 }
 464
 465 void Session::load_file(QString file_name,
 466         std::shared_ptr<sigrok::InputFormat> format,
 467         const std::map<std::string, Glib::VariantBase> &options)
 468 {
 469         const QString errorMessage(
 470                 QString("Failed to load file %1").arg(file_name));
 471
 472         try {
 473                 if (format)
 474                         set_device(shared_ptr<devices::Device>(
 475                                 new devices::InputFile(
 476                                         device_manager_.context(),
 477                                         file_name.toStdString(),
 478                                         format, options)));
 479                 else
 480                         set_device(shared_ptr<devices::Device>(
 481                                 new devices::SessionFile(
 482                                         device_manager_.context(),
 483                                         file_name.toStdString())));
 484         } catch (Error e) {
 485                 main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
 486                 set_default_device();
 487                 main_bar_->update_device_list();
 488                 return;
 489         }
 490
 491         main_bar_->update_device_list();
 492
 493         start_capture([&, errorMessage](QString infoMessage) {
 494                 main_bar_->session_error(errorMessage, infoMessage); });
 495
 496         set_name(QFileInfo(file_name).fileName());
 497 }
 498
 499 Session::capture_state Session::get_capture_state() const
 500 {
 501         lock_guard<mutex> lock(sampling_mutex_);
 502         return capture_state_;
 503 }
 504
 505 void Session::start_capture(function<void (const QString)> error_handler)
 506 {
 507         if (!device_) {
 508                 error_handler(tr("No active device set, can't start acquisition."));
 509                 return;
 510         }
 511
 512         stop_capture();
 513
 514         // Check that at least one channel is enabled
 515         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 516         if (sr_dev) {
 517                 const auto channels = sr_dev->channels();
 518                 if (!std::any_of(channels.begin(), channels.end(),
 519                         [](shared_ptr<Channel> channel) {
 520                                 return channel->enabled(); })) {
 521                         error_handler(tr("No channels enabled."));
 522                         return;
 523                 }
 524         }
 525
 526         // Clear signal data
 527         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 528                 d->clear();
 529
 530         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 531         name_ = default_name_;
 532         name_changed();
 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(std::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(std::shared_ptr<views::ViewBase> view)
 561 {
 562         views_.remove_if([&](std::shared_ptr<views::ViewBase> v) {
 563                 return v == view; });
 564
 565         if (views_.empty()) {
 566                 main_view_.reset();
 567
 568                 // Without a view there can be no main bar
 569                 main_bar_.reset();
 570         }
 571 }
 572
 573 bool Session::has_view(std::shared_ptr<views::ViewBase> view)
 574 {
 575         for (std::shared_ptr<views::ViewBase> v : views_)
 576                 if (v == view)
 577                         return true;
 578
 579         return false;
 580 }
 581
 582 double Session::get_samplerate() const
 583 {
 584         double samplerate = 0.0;
 585
 586         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 587                 assert(d);
 588                 const vector< shared_ptr<pv::data::Segment> > segments =
 589                         d->segments();
 590                 for (const shared_ptr<pv::data::Segment> &s : segments)
 591                         samplerate = std::max(samplerate, s->samplerate());
 592         }
 593         // If there is no sample rate given we use samples as unit
 594         if (samplerate == 0.0)
 595                 samplerate = 1.0;
 596
 597         return samplerate;
 598 }
 599
 600 const std::unordered_set< std::shared_ptr<data::SignalBase> >
 601         Session::signalbases() const
 602 {
 603         return signalbases_;
 604 }
 605
 606 #ifdef ENABLE_DECODE
 607 bool Session::add_decoder(srd_decoder *const dec)
 608 {
 609         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 610         shared_ptr<data::DecoderStack> decoder_stack;
 611
 612         try {
 613                 // Create the decoder
 614                 decoder_stack = shared_ptr<data::DecoderStack>(
 615                         new data::DecoderStack(*this, dec));
 616
 617                 // Make a list of all the channels
 618                 std::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->type() == ChannelType::LOGIC) {
 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                         shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
 642
 643                 signalbase->set_decoder_stack(decoder_stack);
 644                 signalbases_.insert(signalbase);
 645
 646                 for (std::shared_ptr<views::ViewBase> view : views_)
 647                         view->add_decode_signal(signalbase);
 648         } catch (std::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 (std::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 (std::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 (std::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 = std::count_if(
 717                 channels.begin(), channels.end(),
 718                 [] (shared_ptr<Channel> channel) {
 719                         return channel->type() == 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 (std::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 = std::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 = shared_ptr<data::SignalBase>(
 770                                                                 new data::SignalBase(channel));
 771                                                         signalbases_.insert(signalbase);
 772
 773                                                         all_signal_data_.insert(logic_data_);
 774                                                         signalbase->set_data(logic_data_);
 775                                                 }
 776
 777                                                 signal = shared_ptr<views::TraceView::Signal>(
 778                                                         new views::TraceView::LogicSignal(*this,
 779                                                                 device_, signalbase));
 780                                                 trace_view->add_signal(signal);
 781                                                 break;
 782
 783                                         case SR_CHANNEL_ANALOG:
 784                                         {
 785                                                 if (!signalbase) {
 786                                                         signalbase = shared_ptr<data::SignalBase>(
 787                                                                 new data::SignalBase(channel));
 788                                                         signalbases_.insert(signalbase);
 789
 790                                                         shared_ptr<data::Analog> data(new data::Analog());
 791                                                         all_signal_data_.insert(data);
 792                                                         signalbase->set_data(data);
 793                                                 }
 794
 795                                                 signal = shared_ptr<views::TraceView::Signal>(
 796                                                         new views::TraceView::AnalogSignal(
 797                                                                 *this, signalbase));
 798                                                 trace_view->add_signal(signal);
 799                                                 break;
 800                                         }
 801
 802                                         default:
 803                                                 assert(0);
 804                                                 break;
 805                                         }
 806                                 }
 807                         }
 808                 }
 809         }
 810
 811         signals_changed();
 812 }
 813
 814 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 815         shared_ptr<sigrok::Channel> channel) const
 816 {
 817         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 818                 assert(sig);
 819                 if (sig->channel() == channel)
 820                         return sig;
 821         }
 822         return shared_ptr<data::SignalBase>();
 823 }
 824
 825 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 826 {
 827         assert(error_handler);
 828
 829         if (!device_)
 830                 return;
 831
 832         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 833
 834         out_of_memory_ = false;
 835
 836         try {
 837                 device_->start();
 838         } catch (Error e) {
 839                 error_handler(e.what());
 840                 return;
 841         }
 842
 843         set_capture_state(device_->session()->trigger() ?
 844                 AwaitingTrigger : Running);
 845
 846         device_->run();
 847         set_capture_state(Stopped);
 848
 849         // Confirm that SR_DF_END was received
 850         if (cur_logic_segment_) {
 851                 qDebug("SR_DF_END was not received.");
 852                 assert(0);
 853         }
 854
 855         if (out_of_memory_)
 856                 error_handler(tr("Out of memory, acquisition stopped."));
 857 }
 858
 859 void Session::feed_in_header()
 860 {
 861         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 862 }
 863
 864 void Session::feed_in_meta(shared_ptr<Meta> meta)
 865 {
 866         for (auto entry : meta->config()) {
 867                 switch (entry.first->id()) {
 868                 case SR_CONF_SAMPLERATE:
 869                         // We can't rely on the header to always contain the sample rate,
 870                         // so in case it's supplied via a meta packet, we use it.
 871                         if (!cur_samplerate_)
 872                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 873
 874                         /// @todo handle samplerate changes
 875                         break;
 876                 default:
 877                         // Unknown metadata is not an error.
 878                         break;
 879                 }
 880         }
 881
 882         signals_changed();
 883 }
 884
 885 void Session::feed_in_trigger()
 886 {
 887         // The channel containing most samples should be most accurate
 888         uint64_t sample_count = 0;
 889
 890         {
 891                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 892                         assert(d);
 893                         uint64_t temp_count = 0;
 894
 895                         const vector< shared_ptr<pv::data::Segment> > segments =
 896                                 d->segments();
 897                         for (const shared_ptr<pv::data::Segment> &s : segments)
 898                                 temp_count += s->get_sample_count();
 899
 900                         if (temp_count > sample_count)
 901                                 sample_count = temp_count;
 902                 }
 903         }
 904
 905         trigger_event(sample_count / get_samplerate());
 906 }
 907
 908 void Session::feed_in_frame_begin()
 909 {
 910         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 911                 frame_began();
 912 }
 913
 914 void Session::feed_in_logic(shared_ptr<Logic> logic)
 915 {
 916         lock_guard<recursive_mutex> lock(data_mutex_);
 917
 918         const size_t sample_count = logic->data_length() / logic->unit_size();
 919
 920         if (!logic_data_) {
 921                 // The only reason logic_data_ would not have been created is
 922                 // if it was not possible to determine the signals when the
 923                 // device was created.
 924                 update_signals();
 925         }
 926
 927         if (!cur_logic_segment_) {
 928                 // This could be the first packet after a trigger
 929                 set_capture_state(Running);
 930
 931                 // Create a new data segment
 932                 cur_logic_segment_ = shared_ptr<data::LogicSegment>(
 933                         new data::LogicSegment(
 934                                 logic, cur_samplerate_, sample_count));
 935                 logic_data_->push_segment(cur_logic_segment_);
 936
 937                 // @todo Putting this here means that only listeners querying
 938                 // for logic will be notified. Currently the only user of
 939                 // frame_began is DecoderStack, but in future we need to signal
 940                 // this after both analog and logic sweeps have begun.
 941                 frame_began();
 942         } else {
 943                 // Append to the existing data segment
 944                 cur_logic_segment_->append_payload(logic);
 945         }
 946
 947         data_received();
 948 }
 949
 950 void Session::feed_in_analog(shared_ptr<Analog> analog)
 951 {
 952         lock_guard<recursive_mutex> lock(data_mutex_);
 953
 954         const vector<shared_ptr<Channel>> channels = analog->channels();
 955         const unsigned int channel_count = channels.size();
 956         const size_t sample_count = analog->num_samples() / channel_count;
 957         const float *data = static_cast<const float *>(analog->data_pointer());
 958         bool sweep_beginning = false;
 959
 960         if (signalbases_.empty())
 961                 update_signals();
 962
 963         for (auto channel : channels) {
 964                 shared_ptr<data::AnalogSegment> segment;
 965
 966                 // Try to get the segment of the channel
 967                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 968                         iterator iter = cur_analog_segments_.find(channel);
 969                 if (iter != cur_analog_segments_.end())
 970                         segment = (*iter).second;
 971                 else {
 972                         // If no segment was found, this means we haven't
 973                         // created one yet. i.e. this is the first packet
 974                         // in the sweep containing this segment.
 975                         sweep_beginning = true;
 976
 977                         // Create a segment, keep it in the maps of channels
 978                         segment = shared_ptr<data::AnalogSegment>(
 979                                 new data::AnalogSegment(
 980                                         cur_samplerate_, sample_count));
 981                         cur_analog_segments_[channel] = segment;
 982
 983                         // Find the analog data associated with the channel
 984                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 985                         assert(base);
 986
 987                         shared_ptr<data::Analog> data(base->analog_data());
 988                         assert(data);
 989
 990                         // Push the segment into the analog data.
 991                         data->push_segment(segment);
 992                 }
 993
 994                 assert(segment);
 995
 996                 // Append the samples in the segment
 997                 segment->append_interleaved_samples(data++, sample_count,
 998                         channel_count);
 999         }
1000
1001         if (sweep_beginning) {
1002                 // This could be the first packet after a trigger
1003                 set_capture_state(Running);
1004         }
1005
1006         data_received();
1007 }
1008
1009 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1010         shared_ptr<Packet> packet)
1011 {
1012         (void)device;
1013
1014         assert(device);
1015         assert(device == device_->device());
1016         assert(packet);
1017
1018         switch (packet->type()->id()) {
1019         case SR_DF_HEADER:
1020                 feed_in_header();
1021                 break;
1022
1023         case SR_DF_META:
1024                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1025                 break;
1026
1027         case SR_DF_TRIGGER:
1028                 feed_in_trigger();
1029                 break;
1030
1031         case SR_DF_FRAME_BEGIN:
1032                 feed_in_frame_begin();
1033                 break;
1034
1035         case SR_DF_LOGIC:
1036                 try {
1037                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1038                 } catch (std::bad_alloc) {
1039                         out_of_memory_ = true;
1040                         device_->stop();
1041                 }
1042                 break;
1043
1044         case SR_DF_ANALOG:
1045                 try {
1046                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1047                 } catch (std::bad_alloc) {
1048                         out_of_memory_ = true;
1049                         device_->stop();
1050                 }
1051                 break;
1052
1053         case SR_DF_END:
1054         {
1055                 {
1056                         lock_guard<recursive_mutex> lock(data_mutex_);
1057                         cur_logic_segment_.reset();
1058                         cur_analog_segments_.clear();
1059                 }
1060                 frame_ended();
1061                 break;
1062         }
1063         default:
1064                 break;
1065         }
1066 }
1067
1068 } // namespace pv