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         name_(name),
 103         capture_state_(Stopped),
 104         cur_samplerate_(0)
 105 {
 106 }
 107
 108 Session::~Session()
 109 {
 110         // Stop and join to the thread
 111         stop_capture();
 112 }
 113
 114 DeviceManager& Session::device_manager()
 115 {
 116         return device_manager_;
 117 }
 118
 119 const DeviceManager& Session::device_manager() const
 120 {
 121         return device_manager_;
 122 }
 123
 124 shared_ptr<sigrok::Session> Session::session() const
 125 {
 126         if (!device_)
 127                 return shared_ptr<sigrok::Session>();
 128         return device_->session();
 129 }
 130
 131 shared_ptr<devices::Device> Session::device() const
 132 {
 133         return device_;
 134 }
 135
 136 QString Session::name() const
 137 {
 138         return name_;
 139 }
 140
 141 void Session::set_name(QString name)
 142 {
 143         if (default_name_.isEmpty())
 144                 default_name_ = name;
 145
 146         name_ = name;
 147
 148         name_changed();
 149 }
 150
 151 const std::list< std::shared_ptr<pv::view::View> > Session::views() const
 152 {
 153         return views_;
 154 }
 155
 156 std::shared_ptr<pv::view::View> Session::main_view() const
 157 {
 158         return main_view_;
 159 }
 160
 161 void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
 162 {
 163         main_bar_ = main_bar;
 164 }
 165
 166 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 167 {
 168         return main_bar_;
 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.push_back("vendor");
 186                         key_list.push_back("model");
 187                         key_list.push_back("version");
 188                         key_list.push_back("serial_num");
 189                         key_list.push_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                                 std::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<view::View> 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.push_back("vendor");
 270                 key_list.push_back("model");
 271                 key_list.push_back("version");
 272                 key_list.push_back("serial_num");
 273                 key_list.push_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(std::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 = std::make_shared<devices::SessionFile>(device_manager_.context(),
 301                                 filename.toStdString());
 302                         set_device(device);
 303                         set_name(filename);
 304
 305                         // TODO Perform error handling
 306                         start_capture([](QString infoMessage) { (void)infoMessage; });
 307                 }
 308         }
 309
 310         if (device) {
 311                 // Restore channels
 312                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 313                         settings.beginGroup(base->internal_name());
 314                         base->restore_settings(settings);
 315                         settings.endGroup();
 316                 }
 317
 318                 // Restore decoders
 319 #ifdef ENABLE_DECODE
 320                 int stacks = settings.value("decoder_stacks").toInt();
 321
 322                 for (int i = 0; i < stacks; i++) {
 323                         settings.beginGroup("decoder_stack" + QString::number(i++));
 324
 325                         QString id = settings.value("id").toString();
 326                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 327
 328                         settings.endGroup();
 329                 }
 330 #endif
 331
 332                 // Restore views
 333                 int views = settings.value("views").toInt();
 334
 335                 for (int i = 0; i < views; i++) {
 336                         settings.beginGroup("view" + QString::number(i));
 337
 338                         if (i > 0) {
 339                                 view::ViewType type = (view::ViewType)settings.value("type").toInt();
 340                                 add_view(name_, type, this);
 341                                 views_.back()->restore_settings(settings);
 342                         } else
 343                                 main_view_->restore_settings(settings);
 344
 345                         settings.endGroup();
 346                 }
 347         }
 348 }
 349
 350 void Session::set_device(shared_ptr<devices::Device> device)
 351 {
 352         assert(device);
 353
 354         // Ensure we are not capturing before setting the device
 355         stop_capture();
 356
 357         if (device_)
 358                 device_->close();
 359
 360         device_.reset();
 361
 362         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 363         name_ = default_name_;
 364         name_changed();
 365
 366         // Remove all stored data
 367         for (std::shared_ptr<pv::view::View> view : views_) {
 368                 view->clear_signals();
 369 #ifdef ENABLE_DECODE
 370                 view->clear_decode_traces();
 371 #endif
 372         }
 373         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 374                 d->clear();
 375         all_signal_data_.clear();
 376         signalbases_.clear();
 377         cur_logic_segment_.reset();
 378
 379         for (auto entry : cur_analog_segments_) {
 380                 shared_ptr<sigrok::Channel>(entry.first).reset();
 381                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 382         }
 383
 384         logic_data_.reset();
 385
 386         signals_changed();
 387
 388         device_ = std::move(device);
 389
 390         try {
 391                 device_->open();
 392         } catch (const QString &e) {
 393                 device_.reset();
 394                 device_changed();
 395                 throw;
 396         }
 397
 398         device_->session()->add_datafeed_callback([=]
 399                 (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 400                         data_feed_in(device, packet);
 401                 });
 402
 403         update_signals();
 404         device_changed();
 405 }
 406
 407 void Session::set_default_device()
 408 {
 409         const list< shared_ptr<devices::HardwareDevice> > &devices =
 410                 device_manager_.devices();
 411
 412         if (devices.empty())
 413                 return;
 414
 415         // Try and find the demo device and select that by default
 416         const auto iter = std::find_if(devices.begin(), devices.end(),
 417                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 418                         return d->hardware_device()->driver()->name() ==
 419                         "demo"; });
 420         set_device((iter == devices.end()) ? devices.front() : *iter);
 421 }
 422
 423 Session::capture_state Session::get_capture_state() const
 424 {
 425         lock_guard<mutex> lock(sampling_mutex_);
 426         return capture_state_;
 427 }
 428
 429 void Session::start_capture(function<void (const QString)> error_handler)
 430 {
 431         if (!device_) {
 432                 error_handler(tr("No active device set, can't start acquisition."));
 433                 return;
 434         }
 435
 436         stop_capture();
 437
 438         // Check that at least one channel is enabled
 439         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 440         if (sr_dev) {
 441                 const auto channels = sr_dev->channels();
 442                 if (!std::any_of(channels.begin(), channels.end(),
 443                         [](shared_ptr<Channel> channel) {
 444                                 return channel->enabled(); })) {
 445                         error_handler(tr("No channels enabled."));
 446                         return;
 447                 }
 448         }
 449
 450         // Clear signal data
 451         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 452                 d->clear();
 453
 454         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 455         name_ = default_name_;
 456         name_changed();
 457
 458         // Begin the session
 459         sampling_thread_ = std::thread(
 460                 &Session::sample_thread_proc, this, error_handler);
 461 }
 462
 463 void Session::stop_capture()
 464 {
 465         if (get_capture_state() != Stopped)
 466                 device_->stop();
 467
 468         // Check that sampling stopped
 469         if (sampling_thread_.joinable())
 470                 sampling_thread_.join();
 471 }
 472
 473 void Session::register_view(std::shared_ptr<pv::view::View> view)
 474 {
 475         if (views_.empty()) {
 476                 main_view_ = view;
 477         }
 478
 479         views_.push_back(view);
 480
 481         update_signals();
 482 }
 483
 484 void Session::deregister_view(std::shared_ptr<pv::view::View> view)
 485 {
 486         views_.remove_if([&](std::shared_ptr<pv::view::View> v) {
 487                 return v == view; });
 488
 489         if (views_.empty()) {
 490                 main_view_.reset();
 491
 492                 // Without a view there can be no main bar
 493                 main_bar_.reset();
 494         }
 495 }
 496
 497 bool Session::has_view(std::shared_ptr<pv::view::View> view)
 498 {
 499         for (std::shared_ptr<pv::view::View> v : views_)
 500                 if (v == view)
 501                         return true;
 502
 503         return false;
 504 }
 505
 506 double Session::get_samplerate() const
 507 {
 508         double samplerate = 0.0;
 509
 510         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 511                 assert(d);
 512                 const vector< shared_ptr<pv::data::Segment> > segments =
 513                         d->segments();
 514                 for (const shared_ptr<pv::data::Segment> &s : segments)
 515                         samplerate = std::max(samplerate, s->samplerate());
 516         }
 517         // If there is no sample rate given we use samples as unit
 518         if (samplerate == 0.0)
 519                 samplerate = 1.0;
 520
 521         return samplerate;
 522 }
 523
 524 const std::unordered_set< std::shared_ptr<data::SignalBase> >
 525         Session::signalbases() const
 526 {
 527         return signalbases_;
 528 }
 529
 530 #ifdef ENABLE_DECODE
 531 bool Session::add_decoder(srd_decoder *const dec)
 532 {
 533         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 534         shared_ptr<data::DecoderStack> decoder_stack;
 535
 536         try {
 537                 // Create the decoder
 538                 decoder_stack = shared_ptr<data::DecoderStack>(
 539                         new data::DecoderStack(*this, dec));
 540
 541                 // Make a list of all the channels
 542                 std::vector<const srd_channel*> all_channels;
 543                 for (const GSList *i = dec->channels; i; i = i->next)
 544                         all_channels.push_back((const srd_channel*)i->data);
 545                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 546                         all_channels.push_back((const srd_channel*)i->data);
 547
 548                 // Auto select the initial channels
 549                 for (const srd_channel *pdch : all_channels)
 550                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 551                                 if (b->type() == ChannelType::LOGIC) {
 552                                         if (QString::fromUtf8(pdch->name).toLower().
 553                                                 contains(b->name().toLower()))
 554                                                 channels[pdch] = b;
 555                                 }
 556                         }
 557
 558                 assert(decoder_stack);
 559                 assert(!decoder_stack->stack().empty());
 560                 assert(decoder_stack->stack().front());
 561                 decoder_stack->stack().front()->set_channels(channels);
 562
 563                 // Create the decode signal
 564                 shared_ptr<data::SignalBase> signalbase =
 565                         shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
 566
 567                 signalbase->set_decoder_stack(decoder_stack);
 568                 signalbases_.insert(signalbase);
 569
 570                 for (std::shared_ptr<pv::view::View> view : views_)
 571                         view->add_decode_trace(signalbase);
 572         } catch (std::runtime_error e) {
 573                 return false;
 574         }
 575
 576         signals_changed();
 577
 578         // Do an initial decode
 579         decoder_stack->begin_decode();
 580
 581         return true;
 582 }
 583
 584 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 585 {
 586         for (std::shared_ptr<pv::view::View> view : views_)
 587                 view->remove_decode_trace(signalbase);
 588 }
 589 #endif
 590
 591 void Session::set_capture_state(capture_state state)
 592 {
 593         bool changed;
 594
 595         {
 596                 lock_guard<mutex> lock(sampling_mutex_);
 597                 changed = capture_state_ != state;
 598                 capture_state_ = state;
 599         }
 600
 601         if (changed)
 602                 capture_state_changed(state);
 603 }
 604
 605 void Session::update_signals()
 606 {
 607         if (!device_) {
 608                 signalbases_.clear();
 609                 logic_data_.reset();
 610                 for (std::shared_ptr<pv::view::View> view : views_) {
 611                         view->clear_signals();
 612 #ifdef ENABLE_DECODE
 613                         view->clear_decode_traces();
 614 #endif
 615                 }
 616                 return;
 617         }
 618
 619         lock_guard<recursive_mutex> lock(data_mutex_);
 620
 621         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 622         if (!sr_dev) {
 623                 signalbases_.clear();
 624                 logic_data_.reset();
 625                 for (std::shared_ptr<pv::view::View> view : views_) {
 626                         view->clear_signals();
 627 #ifdef ENABLE_DECODE
 628                         view->clear_decode_traces();
 629 #endif
 630                 }
 631                 return;
 632         }
 633
 634         // Detect what data types we will receive
 635         auto channels = sr_dev->channels();
 636         unsigned int logic_channel_count = std::count_if(
 637                 channels.begin(), channels.end(),
 638                 [] (shared_ptr<Channel> channel) {
 639                         return channel->type() == ChannelType::LOGIC; });
 640
 641         // Create data containers for the logic data segments
 642         {
 643                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 644
 645                 if (logic_channel_count == 0) {
 646                         logic_data_.reset();
 647                 } else if (!logic_data_ ||
 648                         logic_data_->num_channels() != logic_channel_count) {
 649                         logic_data_.reset(new data::Logic(
 650                                 logic_channel_count));
 651                         assert(logic_data_);
 652                 }
 653         }
 654
 655         // Make the signals list
 656         for (std::shared_ptr<pv::view::View> view : views_) {
 657                 unordered_set< shared_ptr<view::Signal> > prev_sigs(view->signals());
 658                 view->clear_signals();
 659
 660                 for (auto channel : sr_dev->channels()) {
 661                         shared_ptr<data::SignalBase> signalbase;
 662                         shared_ptr<view::Signal> signal;
 663
 664                         // Find the channel in the old signals
 665                         const auto iter = std::find_if(
 666                                 prev_sigs.cbegin(), prev_sigs.cend(),
 667                                 [&](const shared_ptr<view::Signal> &s) {
 668                                         return s->base()->channel() == channel;
 669                                 });
 670                         if (iter != prev_sigs.end()) {
 671                                 // Copy the signal from the old set to the new
 672                                 signal = *iter;
 673                                 view->add_signal(signal);
 674                         } else {
 675                                 // Find the signalbase for this channel if possible
 676                                 signalbase.reset();
 677                                 for (const shared_ptr<data::SignalBase> b : signalbases_)
 678                                         if (b->channel() == channel)
 679                                                 signalbase = b;
 680
 681                                 switch(channel->type()->id()) {
 682                                 case SR_CHANNEL_LOGIC:
 683                                         if (!signalbase) {
 684                                                 signalbase = shared_ptr<data::SignalBase>(
 685                                                         new data::SignalBase(channel));
 686                                                 signalbases_.insert(signalbase);
 687
 688                                                 all_signal_data_.insert(logic_data_);
 689                                                 signalbase->set_data(logic_data_);
 690                                         }
 691
 692                                         signal = shared_ptr<view::Signal>(
 693                                                 new view::LogicSignal(*this,
 694                                                         device_, signalbase));
 695                                         view->add_signal(signal);
 696                                         break;
 697
 698                                 case SR_CHANNEL_ANALOG:
 699                                 {
 700                                         if (!signalbase) {
 701                                                 signalbase = shared_ptr<data::SignalBase>(
 702                                                         new data::SignalBase(channel));
 703                                                 signalbases_.insert(signalbase);
 704
 705                                                 shared_ptr<data::Analog> data(new data::Analog());
 706                                                 all_signal_data_.insert(data);
 707                                                 signalbase->set_data(data);
 708                                         }
 709
 710                                         signal = shared_ptr<view::Signal>(
 711                                                 new view::AnalogSignal(
 712                                                         *this, signalbase));
 713                                         view->add_signal(signal);
 714                                         break;
 715                                 }
 716
 717                                 default:
 718                                         assert(0);
 719                                         break;
 720                                 }
 721                         }
 722                 }
 723         }
 724
 725         signals_changed();
 726 }
 727
 728 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 729         shared_ptr<sigrok::Channel> channel) const
 730 {
 731         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 732                 assert(sig);
 733                 if (sig->channel() == channel)
 734                         return sig;
 735         }
 736         return shared_ptr<data::SignalBase>();
 737 }
 738
 739 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 740 {
 741         assert(error_handler);
 742
 743         if (!device_)
 744                 return;
 745
 746         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 747
 748         out_of_memory_ = false;
 749
 750         try {
 751                 device_->start();
 752         } catch (Error e) {
 753                 error_handler(e.what());
 754                 return;
 755         }
 756
 757         set_capture_state(device_->session()->trigger() ?
 758                 AwaitingTrigger : Running);
 759
 760         device_->run();
 761         set_capture_state(Stopped);
 762
 763         // Confirm that SR_DF_END was received
 764         if (cur_logic_segment_) {
 765                 qDebug("SR_DF_END was not received.");
 766                 assert(0);
 767         }
 768
 769         if (out_of_memory_)
 770                 error_handler(tr("Out of memory, acquisition stopped."));
 771 }
 772
 773 void Session::feed_in_header()
 774 {
 775         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 776 }
 777
 778 void Session::feed_in_meta(shared_ptr<Meta> meta)
 779 {
 780         for (auto entry : meta->config()) {
 781                 switch (entry.first->id()) {
 782                 case SR_CONF_SAMPLERATE:
 783                         // We can't rely on the header to always contain the sample rate,
 784                         // so in case it's supplied via a meta packet, we use it.
 785                         if (!cur_samplerate_)
 786                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 787
 788                         /// @todo handle samplerate changes
 789                         break;
 790                 default:
 791                         // Unknown metadata is not an error.
 792                         break;
 793                 }
 794         }
 795
 796         signals_changed();
 797 }
 798
 799 void Session::feed_in_trigger()
 800 {
 801         // The channel containing most samples should be most accurate
 802         uint64_t sample_count = 0;
 803
 804         {
 805                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 806                         assert(d);
 807                         uint64_t temp_count = 0;
 808
 809                         const vector< shared_ptr<pv::data::Segment> > segments =
 810                                 d->segments();
 811                         for (const shared_ptr<pv::data::Segment> &s : segments)
 812                                 temp_count += s->get_sample_count();
 813
 814                         if (temp_count > sample_count)
 815                                 sample_count = temp_count;
 816                 }
 817         }
 818
 819         trigger_event(sample_count / get_samplerate());
 820 }
 821
 822 void Session::feed_in_frame_begin()
 823 {
 824         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 825                 frame_began();
 826 }
 827
 828 void Session::feed_in_logic(shared_ptr<Logic> logic)
 829 {
 830         lock_guard<recursive_mutex> lock(data_mutex_);
 831
 832         const size_t sample_count = logic->data_length() / logic->unit_size();
 833
 834         if (!logic_data_) {
 835                 // The only reason logic_data_ would not have been created is
 836                 // if it was not possible to determine the signals when the
 837                 // device was created.
 838                 update_signals();
 839         }
 840
 841         if (!cur_logic_segment_) {
 842                 // This could be the first packet after a trigger
 843                 set_capture_state(Running);
 844
 845                 // Create a new data segment
 846                 cur_logic_segment_ = shared_ptr<data::LogicSegment>(
 847                         new data::LogicSegment(
 848                                 logic, cur_samplerate_, sample_count));
 849                 logic_data_->push_segment(cur_logic_segment_);
 850
 851                 // @todo Putting this here means that only listeners querying
 852                 // for logic will be notified. Currently the only user of
 853                 // frame_began is DecoderStack, but in future we need to signal
 854                 // this after both analog and logic sweeps have begun.
 855                 frame_began();
 856         } else {
 857                 // Append to the existing data segment
 858                 cur_logic_segment_->append_payload(logic);
 859         }
 860
 861         data_received();
 862 }
 863
 864 void Session::feed_in_analog(shared_ptr<Analog> analog)
 865 {
 866         lock_guard<recursive_mutex> lock(data_mutex_);
 867
 868         const vector<shared_ptr<Channel>> channels = analog->channels();
 869         const unsigned int channel_count = channels.size();
 870         const size_t sample_count = analog->num_samples() / channel_count;
 871         const float *data = static_cast<const float *>(analog->data_pointer());
 872         bool sweep_beginning = false;
 873
 874         if (signalbases_.empty())
 875                 update_signals();
 876
 877         for (auto channel : channels) {
 878                 shared_ptr<data::AnalogSegment> segment;
 879
 880                 // Try to get the segment of the channel
 881                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 882                         iterator iter = cur_analog_segments_.find(channel);
 883                 if (iter != cur_analog_segments_.end())
 884                         segment = (*iter).second;
 885                 else {
 886                         // If no segment was found, this means we haven't
 887                         // created one yet. i.e. this is the first packet
 888                         // in the sweep containing this segment.
 889                         sweep_beginning = true;
 890
 891                         // Create a segment, keep it in the maps of channels
 892                         segment = shared_ptr<data::AnalogSegment>(
 893                                 new data::AnalogSegment(
 894                                         cur_samplerate_, sample_count));
 895                         cur_analog_segments_[channel] = segment;
 896
 897                         // Find the analog data associated with the channel
 898                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 899                         assert(base);
 900
 901                         shared_ptr<data::Analog> data(base->analog_data());
 902                         assert(data);
 903
 904                         // Push the segment into the analog data.
 905                         data->push_segment(segment);
 906                 }
 907
 908                 assert(segment);
 909
 910                 // Append the samples in the segment
 911                 segment->append_interleaved_samples(data++, sample_count,
 912                         channel_count);
 913         }
 914
 915         if (sweep_beginning) {
 916                 // This could be the first packet after a trigger
 917                 set_capture_state(Running);
 918         }
 919
 920         data_received();
 921 }
 922
 923 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
 924         shared_ptr<Packet> packet)
 925 {
 926         (void)device;
 927
 928         assert(device);
 929         assert(device == device_->device());
 930         assert(packet);
 931
 932         switch (packet->type()->id()) {
 933         case SR_DF_HEADER:
 934                 feed_in_header();
 935                 break;
 936
 937         case SR_DF_META:
 938                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
 939                 break;
 940
 941         case SR_DF_TRIGGER:
 942                 feed_in_trigger();
 943                 break;
 944
 945         case SR_DF_FRAME_BEGIN:
 946                 feed_in_frame_begin();
 947                 break;
 948
 949         case SR_DF_LOGIC:
 950                 try {
 951                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
 952                 } catch (std::bad_alloc) {
 953                         out_of_memory_ = true;
 954                         device_->stop();
 955                 }
 956                 break;
 957
 958         case SR_DF_ANALOG:
 959                 try {
 960                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
 961                 } catch (std::bad_alloc) {
 962                         out_of_memory_ = true;
 963                         device_->stop();
 964                 }
 965                 break;
 966
 967         case SR_DF_END:
 968         {
 969                 {
 970                         lock_guard<recursive_mutex> lock(data_mutex_);
 971                         cur_logic_segment_.reset();
 972                         cur_analog_segments_.clear();
 973                 }
 974                 frame_ended();
 975                 break;
 976         }
 977         default:
 978                 break;
 979         }
 980 }
 981
 982 } // namespace pv