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