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