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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <QFileInfo>
  21
  22 #include <cassert>
  23 #include <mutex>
  24 #include <stdexcept>
  25
  26 #include <sys/stat.h>
  27
  28 #include "devicemanager.hpp"
  29 #include "session.hpp"
  30
  31 #include "data/analog.hpp"
  32 #include "data/analogsegment.hpp"
  33 #include "data/decode/decoder.hpp"
  34 #include "data/decoderstack.hpp"
  35 #include "data/logic.hpp"
  36 #include "data/logicsegment.hpp"
  37 #include "data/signalbase.hpp"
  38
  39 #include "devices/hardwaredevice.hpp"
  40 #include "devices/inputfile.hpp"
  41 #include "devices/sessionfile.hpp"
  42
  43 #include "toolbars/mainbar.hpp"
  44
  45 #include "view/analogsignal.hpp"
  46 #include "view/decodetrace.hpp"
  47 #include "view/logicsignal.hpp"
  48 #include "view/signal.hpp"
  49 #include "view/view.hpp"
  50
  51 #include <libsigrokcxx/libsigrokcxx.hpp>
  52
  53 #ifdef ENABLE_DECODE
  54 #include <libsigrokdecode/libsigrokdecode.h>
  55 #endif
  56
  57 using std::bad_alloc;
  58 using std::dynamic_pointer_cast;
  59 using std::find_if;
  60 using std::function;
  61 using std::lock_guard;
  62 using std::list;
  63 using std::make_pair;
  64 using std::make_shared;
  65 using std::map;
  66 using std::max;
  67 using std::move;
  68 using std::mutex;
  69 using std::pair;
  70 using std::recursive_mutex;
  71 using std::runtime_error;
  72 using std::shared_ptr;
  73 using std::string;
  74 using std::unordered_set;
  75 using std::vector;
  76
  77 using sigrok::Analog;
  78 using sigrok::Channel;
  79 using sigrok::ConfigKey;
  80 using sigrok::DatafeedCallbackFunction;
  81 using sigrok::Error;
  82 using sigrok::InputFormat;
  83 using sigrok::Logic;
  84 using sigrok::Meta;
  85 using sigrok::Packet;
  86 using sigrok::Session;
  87
  88 using Glib::VariantBase;
  89
  90 namespace pv {
  91 Session::Session(DeviceManager &device_manager, QString name) :
  92         device_manager_(device_manager),
  93         default_name_(name),
  94         name_(name),
  95         capture_state_(Stopped),
  96         cur_samplerate_(0),
  97         data_saved_(true)
  98 {
  99 }
 100
 101 Session::~Session()
 102 {
 103         // Stop and join to the thread
 104         stop_capture();
 105 }
 106
 107 DeviceManager& Session::device_manager()
 108 {
 109         return device_manager_;
 110 }
 111
 112 const DeviceManager& Session::device_manager() const
 113 {
 114         return device_manager_;
 115 }
 116
 117 shared_ptr<sigrok::Session> Session::session() const
 118 {
 119         if (!device_)
 120                 return shared_ptr<sigrok::Session>();
 121         return device_->session();
 122 }
 123
 124 shared_ptr<devices::Device> Session::device() const
 125 {
 126         return device_;
 127 }
 128
 129 QString Session::name() const
 130 {
 131         return name_;
 132 }
 133
 134 void Session::set_name(QString name)
 135 {
 136         if (default_name_.isEmpty())
 137                 default_name_ = name;
 138
 139         name_ = name;
 140
 141         name_changed();
 142 }
 143
 144 const list< shared_ptr<views::ViewBase> > Session::views() const
 145 {
 146         return views_;
 147 }
 148
 149 shared_ptr<views::ViewBase> Session::main_view() const
 150 {
 151         return main_view_;
 152 }
 153
 154 void Session::set_main_bar(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 bool Session::data_saved() const
 165 {
 166         return data_saved_;
 167 }
 168
 169 void Session::save_settings(QSettings &settings) const
 170 {
 171         map<string, string> dev_info;
 172         list<string> key_list;
 173         int stacks = 0, views = 0;
 174
 175         if (device_) {
 176                 shared_ptr<devices::HardwareDevice> hw_device =
 177                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 178
 179                 if (hw_device) {
 180                         settings.setValue("device_type", "hardware");
 181                         settings.beginGroup("device");
 182
 183                         key_list.emplace_back("vendor");
 184                         key_list.emplace_back("model");
 185                         key_list.emplace_back("version");
 186                         key_list.emplace_back("serial_num");
 187                         key_list.emplace_back("connection_id");
 188
 189                         dev_info = device_manager_.get_device_info(device_);
 190
 191                         for (string key : key_list) {
 192                                 if (dev_info.count(key))
 193                                         settings.setValue(QString::fromUtf8(key.c_str()),
 194                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 195                                 else
 196                                         settings.remove(QString::fromUtf8(key.c_str()));
 197                         }
 198
 199                         settings.endGroup();
 200                 }
 201
 202                 shared_ptr<devices::SessionFile> sessionfile_device =
 203                         dynamic_pointer_cast< devices::SessionFile >(device_);
 204
 205                 if (sessionfile_device) {
 206                         settings.setValue("device_type", "sessionfile");
 207                         settings.beginGroup("device");
 208                         settings.setValue("filename", QString::fromStdString(
 209                                 sessionfile_device->full_name()));
 210                         settings.endGroup();
 211                 }
 212
 213                 // Save channels and decoders
 214                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 215 #ifdef ENABLE_DECODE
 216                         if (base->is_decode_signal()) {
 217                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 218                                                 base->decoder_stack();
 219                                 shared_ptr<data::decode::Decoder> top_decoder =
 220                                                 decoder_stack->stack().front();
 221
 222                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 223                                 settings.setValue("id", top_decoder->decoder()->id);
 224                                 settings.setValue("name", top_decoder->decoder()->name);
 225                                 settings.endGroup();
 226                         } else
 227 #endif
 228                         {
 229                                 settings.beginGroup(base->internal_name());
 230                                 base->save_settings(settings);
 231                                 settings.endGroup();
 232                         }
 233                 }
 234
 235                 settings.setValue("decoder_stacks", stacks);
 236
 237                 // Save view states and their signal settings
 238                 // Note: main_view must be saved as view0
 239                 settings.beginGroup("view" + QString::number(views++));
 240                 main_view_->save_settings(settings);
 241                 settings.endGroup();
 242
 243                 for (shared_ptr<views::ViewBase> view : views_) {
 244                         if (view != main_view_) {
 245                                 settings.beginGroup("view" + QString::number(views++));
 246                                 view->save_settings(settings);
 247                                 settings.endGroup();
 248                         }
 249                 }
 250
 251                 settings.setValue("views", views);
 252         }
 253 }
 254
 255 void Session::restore_settings(QSettings &settings)
 256 {
 257         shared_ptr<devices::Device> device;
 258
 259         QString device_type = settings.value("device_type").toString();
 260
 261         if (device_type == "hardware") {
 262                 map<string, string> dev_info;
 263                 list<string> key_list;
 264
 265                 // Re-select last used device if possible but only if it's not demo
 266                 settings.beginGroup("device");
 267                 key_list.emplace_back("vendor");
 268                 key_list.emplace_back("model");
 269                 key_list.emplace_back("version");
 270                 key_list.emplace_back("serial_num");
 271                 key_list.emplace_back("connection_id");
 272
 273                 for (string key : key_list) {
 274                         const QString k = QString::fromStdString(key);
 275                         if (!settings.contains(k))
 276                                 continue;
 277
 278                         const string value = settings.value(k).toString().toStdString();
 279                         if (!value.empty())
 280                                 dev_info.insert(make_pair(key, value));
 281                 }
 282
 283                 if (dev_info.count("model") > 0)
 284                         device = device_manager_.find_device_from_info(dev_info);
 285
 286                 if (device)
 287                         set_device(device);
 288
 289                 settings.endGroup();
 290         }
 291
 292         if (device_type == "sessionfile") {
 293                 settings.beginGroup("device");
 294                 QString filename = settings.value("filename").toString();
 295                 settings.endGroup();
 296
 297                 if (QFileInfo(filename).isReadable()) {
 298                         device = make_shared<devices::SessionFile>(device_manager_.context(),
 299                                 filename.toStdString());
 300                         set_device(device);
 301
 302                         // TODO Perform error handling
 303                         start_capture([](QString infoMessage) { (void)infoMessage; });
 304
 305                         set_name(QFileInfo(filename).fileName());
 306                 }
 307         }
 308
 309         if (device) {
 310                 // Restore channels
 311                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 312                         settings.beginGroup(base->internal_name());
 313                         base->restore_settings(settings);
 314                         settings.endGroup();
 315                 }
 316
 317                 // Restore decoders
 318 #ifdef ENABLE_DECODE
 319                 int stacks = settings.value("decoder_stacks").toInt();
 320
 321                 for (int i = 0; i < stacks; i++) {
 322                         settings.beginGroup("decoder_stack" + QString::number(i++));
 323
 324                         QString id = settings.value("id").toString();
 325                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 326
 327                         settings.endGroup();
 328                 }
 329 #endif
 330
 331                 // Restore views
 332                 int views = settings.value("views").toInt();
 333
 334                 for (int i = 0; i < views; i++) {
 335                         settings.beginGroup("view" + QString::number(i));
 336
 337                         if (i > 0) {
 338                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 339                                 add_view(name_, type, this);
 340                                 views_.back()->restore_settings(settings);
 341                         } else
 342                                 main_view_->restore_settings(settings);
 343
 344                         settings.endGroup();
 345                 }
 346         }
 347 }
 348
 349 void Session::select_device(shared_ptr<devices::Device> device)
 350 {
 351         try {
 352                 if (device)
 353                         set_device(device);
 354                 else
 355                         set_default_device();
 356         } catch (const QString &e) {
 357                 main_bar_->session_error(tr("Failed to Select Device"),
 358                         tr("Failed to Select Device"));
 359         }
 360 }
 361
 362 void Session::set_device(shared_ptr<devices::Device> device)
 363 {
 364         assert(device);
 365
 366         // Ensure we are not capturing before setting the device
 367         stop_capture();
 368
 369         if (device_)
 370                 device_->close();
 371
 372         device_.reset();
 373
 374         // Revert name back to default name (e.g. "Session 1") as the data is gone
 375         name_ = default_name_;
 376         name_changed();
 377
 378         // Remove all stored data
 379         for (shared_ptr<views::ViewBase> view : views_) {
 380                 view->clear_signals();
 381 #ifdef ENABLE_DECODE
 382                 view->clear_decode_signals();
 383 #endif
 384         }
 385         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 386                 d->clear();
 387         all_signal_data_.clear();
 388         signalbases_.clear();
 389         cur_logic_segment_.reset();
 390
 391         for (auto entry : cur_analog_segments_) {
 392                 shared_ptr<sigrok::Channel>(entry.first).reset();
 393                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 394         }
 395
 396         logic_data_.reset();
 397
 398         signals_changed();
 399
 400         device_ = move(device);
 401
 402         try {
 403                 device_->open();
 404         } catch (const QString &e) {
 405                 device_.reset();
 406         }
 407
 408         if (device_) {
 409                 device_->session()->add_datafeed_callback([=]
 410                         (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 411                                 data_feed_in(device, packet);
 412                         });
 413
 414                 update_signals();
 415         }
 416
 417         device_changed();
 418 }
 419
 420 void Session::set_default_device()
 421 {
 422         const list< shared_ptr<devices::HardwareDevice> > &devices =
 423                 device_manager_.devices();
 424
 425         if (devices.empty())
 426                 return;
 427
 428         // Try and find the demo device and select that by default
 429         const auto iter = find_if(devices.begin(), devices.end(),
 430                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 431                         return d->hardware_device()->driver()->name() == "demo";        });
 432         set_device((iter == devices.end()) ? devices.front() : *iter);
 433 }
 434
 435 void Session::load_init_file(const string &file_name, const string &format)
 436 {
 437         shared_ptr<InputFormat> input_format;
 438
 439         if (!format.empty()) {
 440                 const map<string, shared_ptr<InputFormat> > formats =
 441                         device_manager_.context()->input_formats();
 442                 const auto iter = find_if(formats.begin(), formats.end(),
 443                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 444                                 return f.first == format; });
 445                 if (iter == formats.end()) {
 446                         main_bar_->session_error(tr("Error"),
 447                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 448                         return;
 449                 }
 450
 451                 input_format = (*iter).second;
 452         }
 453
 454         load_file(QString::fromStdString(file_name), input_format);
 455 }
 456
 457 void Session::load_file(QString file_name,
 458         shared_ptr<sigrok::InputFormat> format,
 459         const map<string, Glib::VariantBase> &options)
 460 {
 461         const QString errorMessage(
 462                 QString("Failed to load file %1").arg(file_name));
 463
 464         try {
 465                 if (format)
 466                         set_device(shared_ptr<devices::Device>(
 467                                 new devices::InputFile(
 468                                         device_manager_.context(),
 469                                         file_name.toStdString(),
 470                                         format, options)));
 471                 else
 472                         set_device(shared_ptr<devices::Device>(
 473                                 new devices::SessionFile(
 474                                         device_manager_.context(),
 475                                         file_name.toStdString())));
 476         } catch (Error e) {
 477                 main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
 478                 set_default_device();
 479                 main_bar_->update_device_list();
 480                 return;
 481         }
 482
 483         main_bar_->update_device_list();
 484
 485         start_capture([&, errorMessage](QString infoMessage) {
 486                 main_bar_->session_error(errorMessage, infoMessage); });
 487
 488         set_name(QFileInfo(file_name).fileName());
 489 }
 490
 491 Session::capture_state Session::get_capture_state() const
 492 {
 493         lock_guard<mutex> lock(sampling_mutex_);
 494         return capture_state_;
 495 }
 496
 497 void Session::start_capture(function<void (const QString)> error_handler)
 498 {
 499         if (!device_) {
 500                 error_handler(tr("No active device set, can't start acquisition."));
 501                 return;
 502         }
 503
 504         stop_capture();
 505
 506         // Check that at least one channel is enabled
 507         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 508         if (sr_dev) {
 509                 const auto channels = sr_dev->channels();
 510                 if (!any_of(channels.begin(), channels.end(),
 511                         [](shared_ptr<Channel> channel) {
 512                                 return channel->enabled(); })) {
 513                         error_handler(tr("No channels enabled."));
 514                         return;
 515                 }
 516         }
 517
 518         // Clear signal data
 519         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 520                 d->clear();
 521
 522         // Revert name back to default name (e.g. "Session 1") for real devices
 523         // as the (possibly saved) data is gone. File devices keep their name.
 524         shared_ptr<devices::HardwareDevice> hw_device =
 525                 dynamic_pointer_cast< devices::HardwareDevice >(device_);
 526
 527         if (hw_device) {
 528                 name_ = default_name_;
 529                 name_changed();
 530         }
 531
 532         // Begin the session
 533         sampling_thread_ = std::thread(
 534                 &Session::sample_thread_proc, this, error_handler);
 535 }
 536
 537 void Session::stop_capture()
 538 {
 539         if (get_capture_state() != Stopped)
 540                 device_->stop();
 541
 542         // Check that sampling stopped
 543         if (sampling_thread_.joinable())
 544                 sampling_thread_.join();
 545 }
 546
 547 void Session::register_view(shared_ptr<views::ViewBase> view)
 548 {
 549         if (views_.empty()) {
 550                 main_view_ = view;
 551         }
 552
 553         views_.push_back(view);
 554
 555         update_signals();
 556 }
 557
 558 void Session::deregister_view(shared_ptr<views::ViewBase> view)
 559 {
 560         views_.remove_if([&](shared_ptr<views::ViewBase> v) { return v == view; });
 561
 562         if (views_.empty()) {
 563                 main_view_.reset();
 564
 565                 // Without a view there can be no main bar
 566                 main_bar_.reset();
 567         }
 568 }
 569
 570 bool Session::has_view(shared_ptr<views::ViewBase> view)
 571 {
 572         for (shared_ptr<views::ViewBase> v : views_)
 573                 if (v == view)
 574                         return true;
 575
 576         return false;
 577 }
 578
 579 double Session::get_samplerate() const
 580 {
 581         double samplerate = 0.0;
 582
 583         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 584                 assert(d);
 585                 const vector< shared_ptr<pv::data::Segment> > segments =
 586                         d->segments();
 587                 for (const shared_ptr<pv::data::Segment> &s : segments)
 588                         samplerate = max(samplerate, s->samplerate());
 589         }
 590         // If there is no sample rate given we use samples as unit
 591         if (samplerate == 0.0)
 592                 samplerate = 1.0;
 593
 594         return samplerate;
 595 }
 596
 597 const unordered_set< shared_ptr<data::SignalBase> > Session::signalbases() const
 598 {
 599         return signalbases_;
 600 }
 601
 602 #ifdef ENABLE_DECODE
 603 bool Session::add_decoder(srd_decoder *const dec)
 604 {
 605         if (!dec)
 606                 return false;
 607
 608         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 609         shared_ptr<data::DecoderStack> decoder_stack;
 610
 611         try {
 612                 // Create the decoder
 613                 decoder_stack = make_shared<data::DecoderStack>(*this, dec);
 614
 615                 // Make a list of all the channels
 616                 vector<const srd_channel*> all_channels;
 617                 for (const GSList *i = dec->channels; i; i = i->next)
 618                         all_channels.push_back((const srd_channel*)i->data);
 619                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 620                         all_channels.push_back((const srd_channel*)i->data);
 621
 622                 // Auto select the initial channels
 623                 for (const srd_channel *pdch : all_channels)
 624                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 625                                 if (b->logic_data()) {
 626                                         if (QString::fromUtf8(pdch->name).toLower().
 627                                                 contains(b->name().toLower()))
 628                                                 channels[pdch] = b;
 629                                 }
 630                         }
 631
 632                 assert(decoder_stack);
 633                 assert(!decoder_stack->stack().empty());
 634                 assert(decoder_stack->stack().front());
 635                 decoder_stack->stack().front()->set_channels(channels);
 636
 637                 // Create the decode signal
 638                 shared_ptr<data::SignalBase> signalbase =
 639                         make_shared<data::SignalBase>(nullptr, data::SignalBase::DecodeChannel);
 640
 641                 signalbase->set_decoder_stack(decoder_stack);
 642                 signalbases_.insert(signalbase);
 643
 644                 for (shared_ptr<views::ViewBase> view : views_)
 645                         view->add_decode_signal(signalbase);
 646         } catch (runtime_error e) {
 647                 return false;
 648         }
 649
 650         signals_changed();
 651
 652         // Do an initial decode
 653         decoder_stack->begin_decode();
 654
 655         return true;
 656 }
 657
 658 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 659 {
 660         signalbases_.erase(signalbase);
 661
 662         for (shared_ptr<views::ViewBase> view : views_)
 663                 view->remove_decode_signal(signalbase);
 664
 665         signals_changed();
 666 }
 667 #endif
 668
 669 void Session::set_capture_state(capture_state state)
 670 {
 671         bool changed;
 672
 673         {
 674                 lock_guard<mutex> lock(sampling_mutex_);
 675                 changed = capture_state_ != state;
 676                 capture_state_ = state;
 677         }
 678
 679         if (changed)
 680                 capture_state_changed(state);
 681 }
 682
 683 void Session::update_signals()
 684 {
 685         if (!device_) {
 686                 signalbases_.clear();
 687                 logic_data_.reset();
 688                 for (shared_ptr<views::ViewBase> view : views_) {
 689                         view->clear_signals();
 690 #ifdef ENABLE_DECODE
 691                         view->clear_decode_signals();
 692 #endif
 693                 }
 694                 return;
 695         }
 696
 697         lock_guard<recursive_mutex> lock(data_mutex_);
 698
 699         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 700         if (!sr_dev) {
 701                 signalbases_.clear();
 702                 logic_data_.reset();
 703                 for (shared_ptr<views::ViewBase> view : views_) {
 704                         view->clear_signals();
 705 #ifdef ENABLE_DECODE
 706                         view->clear_decode_signals();
 707 #endif
 708                 }
 709                 return;
 710         }
 711
 712         // Detect what data types we will receive
 713         auto channels = sr_dev->channels();
 714         unsigned int logic_channel_count = count_if(
 715                 channels.begin(), channels.end(),
 716                 [] (shared_ptr<Channel> channel) {
 717                         return channel->type() == sigrok::ChannelType::LOGIC; });
 718
 719         // Create data containers for the logic data segments
 720         {
 721                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 722
 723                 if (logic_channel_count == 0) {
 724                         logic_data_.reset();
 725                 } else if (!logic_data_ ||
 726                         logic_data_->num_channels() != logic_channel_count) {
 727                         logic_data_.reset(new data::Logic(
 728                                 logic_channel_count));
 729                         assert(logic_data_);
 730                 }
 731         }
 732
 733         // Make the signals list
 734         for (shared_ptr<views::ViewBase> viewbase : views_) {
 735                 views::TraceView::View *trace_view =
 736                         qobject_cast<views::TraceView::View*>(viewbase.get());
 737
 738                 if (trace_view) {
 739                         unordered_set< shared_ptr<views::TraceView::Signal> >
 740                                 prev_sigs(trace_view->signals());
 741                         trace_view->clear_signals();
 742
 743                         for (auto channel : sr_dev->channels()) {
 744                                 shared_ptr<data::SignalBase> signalbase;
 745                                 shared_ptr<views::TraceView::Signal> signal;
 746
 747                                 // Find the channel in the old signals
 748                                 const auto iter = find_if(
 749                                         prev_sigs.cbegin(), prev_sigs.cend(),
 750                                         [&](const shared_ptr<views::TraceView::Signal> &s) {
 751                                                 return s->base()->channel() == channel;
 752                                         });
 753                                 if (iter != prev_sigs.end()) {
 754                                         // Copy the signal from the old set to the new
 755                                         signal = *iter;
 756                                         trace_view->add_signal(signal);
 757                                 } else {
 758                                         // Find the signalbase for this channel if possible
 759                                         signalbase.reset();
 760                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 761                                                 if (b->channel() == channel)
 762                                                         signalbase = b;
 763
 764                                         switch(channel->type()->id()) {
 765                                         case SR_CHANNEL_LOGIC:
 766                                                 if (!signalbase) {
 767                                                         signalbase = make_shared<data::SignalBase>(channel,
 768                                                                 data::SignalBase::LogicChannel);
 769                                                         signalbases_.insert(signalbase);
 770
 771                                                         all_signal_data_.insert(logic_data_);
 772                                                         signalbase->set_data(logic_data_);
 773
 774                                                         connect(this, SIGNAL(capture_state_changed(int)),
 775                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 776                                                 }
 777
 778                                                 signal = shared_ptr<views::TraceView::Signal>(
 779                                                         new views::TraceView::LogicSignal(*this,
 780                                                                 device_, signalbase));
 781                                                 trace_view->add_signal(signal);
 782                                                 break;
 783
 784                                         case SR_CHANNEL_ANALOG:
 785                                         {
 786                                                 if (!signalbase) {
 787                                                         signalbase = make_shared<data::SignalBase>(channel,
 788                                                                 data::SignalBase::AnalogChannel);
 789                                                         signalbases_.insert(signalbase);
 790
 791                                                         shared_ptr<data::Analog> data(new data::Analog());
 792                                                         all_signal_data_.insert(data);
 793                                                         signalbase->set_data(data);
 794
 795                                                         connect(this, SIGNAL(capture_state_changed(int)),
 796                                                                 signalbase.get(), SLOT(on_capture_state_changed(int)));
 797                                                 }
 798
 799                                                 signal = shared_ptr<views::TraceView::Signal>(
 800                                                         new views::TraceView::AnalogSignal(
 801                                                                 *this, signalbase));
 802                                                 trace_view->add_signal(signal);
 803                                                 break;
 804                                         }
 805
 806                                         default:
 807                                                 assert(false);
 808                                                 break;
 809                                         }
 810                                 }
 811                         }
 812                 }
 813         }
 814
 815         signals_changed();
 816 }
 817
 818 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 819         shared_ptr<sigrok::Channel> channel) const
 820 {
 821         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 822                 assert(sig);
 823                 if (sig->channel() == channel)
 824                         return sig;
 825         }
 826         return shared_ptr<data::SignalBase>();
 827 }
 828
 829 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 830 {
 831         assert(error_handler);
 832
 833         if (!device_)
 834                 return;
 835
 836         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 837
 838         out_of_memory_ = false;
 839
 840         try {
 841                 device_->start();
 842         } catch (Error e) {
 843                 error_handler(e.what());
 844                 return;
 845         }
 846
 847         set_capture_state(device_->session()->trigger() ?
 848                 AwaitingTrigger : Running);
 849
 850         device_->run();
 851         set_capture_state(Stopped);
 852
 853         // Confirm that SR_DF_END was received
 854         if (cur_logic_segment_) {
 855                 qDebug("SR_DF_END was not received.");
 856                 assert(false);
 857         }
 858
 859         // Optimize memory usage
 860         free_unused_memory();
 861
 862         // We now have unsaved data unless we just "captured" from a file
 863         shared_ptr<devices::File> file_device =
 864                 dynamic_pointer_cast<devices::File>(device_);
 865
 866         if (!file_device)
 867                 data_saved_ = false;
 868
 869         if (out_of_memory_)
 870                 error_handler(tr("Out of memory, acquisition stopped."));
 871 }
 872
 873 void Session::free_unused_memory()
 874 {
 875         for (shared_ptr<data::SignalData> data : all_signal_data_) {
 876                 const vector< shared_ptr<data::Segment> > segments = data->segments();
 877
 878                 for (shared_ptr<data::Segment> segment : segments) {
 879                         segment->free_unused_memory();
 880                 }
 881         }
 882 }
 883
 884 void Session::feed_in_header()
 885 {
 886         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 887 }
 888
 889 void Session::feed_in_meta(shared_ptr<Meta> meta)
 890 {
 891         for (auto entry : meta->config()) {
 892                 switch (entry.first->id()) {
 893                 case SR_CONF_SAMPLERATE:
 894                         // We can't rely on the header to always contain the sample rate,
 895                         // so in case it's supplied via a meta packet, we use it.
 896                         if (!cur_samplerate_)
 897                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 898
 899                         /// @todo handle samplerate changes
 900                         break;
 901                 default:
 902                         // Unknown metadata is not an error.
 903                         break;
 904                 }
 905         }
 906
 907         signals_changed();
 908 }
 909
 910 void Session::feed_in_trigger()
 911 {
 912         // The channel containing most samples should be most accurate
 913         uint64_t sample_count = 0;
 914
 915         {
 916                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 917                         assert(d);
 918                         uint64_t temp_count = 0;
 919
 920                         const vector< shared_ptr<pv::data::Segment> > segments =
 921                                 d->segments();
 922                         for (const shared_ptr<pv::data::Segment> &s : segments)
 923                                 temp_count += s->get_sample_count();
 924
 925                         if (temp_count > sample_count)
 926                                 sample_count = temp_count;
 927                 }
 928         }
 929
 930         trigger_event(sample_count / get_samplerate());
 931 }
 932
 933 void Session::feed_in_frame_begin()
 934 {
 935         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 936                 frame_began();
 937 }
 938
 939 void Session::feed_in_logic(shared_ptr<Logic> logic)
 940 {
 941         lock_guard<recursive_mutex> lock(data_mutex_);
 942
 943         if (!logic_data_) {
 944                 // The only reason logic_data_ would not have been created is
 945                 // if it was not possible to determine the signals when the
 946                 // device was created.
 947                 update_signals();
 948         }
 949
 950         if (!cur_logic_segment_) {
 951                 // This could be the first packet after a trigger
 952                 set_capture_state(Running);
 953
 954                 // Create a new data segment
 955                 cur_logic_segment_ = make_shared<data::LogicSegment>(
 956                         *logic_data_, logic->unit_size(), cur_samplerate_);
 957                 logic_data_->push_segment(cur_logic_segment_);
 958
 959                 // @todo Putting this here means that only listeners querying
 960                 // for logic will be notified. Currently the only user of
 961                 // frame_began is DecoderStack, but in future we need to signal
 962                 // this after both analog and logic sweeps have begun.
 963                 frame_began();
 964         }
 965
 966         cur_logic_segment_->append_payload(logic);
 967
 968         data_received();
 969 }
 970
 971 void Session::feed_in_analog(shared_ptr<Analog> analog)
 972 {
 973         lock_guard<recursive_mutex> lock(data_mutex_);
 974
 975         const vector<shared_ptr<Channel>> channels = analog->channels();
 976         const unsigned int channel_count = channels.size();
 977         const size_t sample_count = analog->num_samples() / channel_count;
 978         const float *data = static_cast<const float *>(analog->data_pointer());
 979         bool sweep_beginning = false;
 980
 981         if (signalbases_.empty())
 982                 update_signals();
 983
 984         for (auto channel : channels) {
 985                 shared_ptr<data::AnalogSegment> segment;
 986
 987                 // Try to get the segment of the channel
 988                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 989                         iterator iter = cur_analog_segments_.find(channel);
 990                 if (iter != cur_analog_segments_.end())
 991                         segment = (*iter).second;
 992                 else {
 993                         // If no segment was found, this means we haven't
 994                         // created one yet. i.e. this is the first packet
 995                         // in the sweep containing this segment.
 996                         sweep_beginning = true;
 997
 998                         // Find the analog data associated with the channel
 999                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
1000                         assert(base);
1001
1002                         shared_ptr<data::Analog> data(base->analog_data());
1003                         assert(data);
1004
1005                         // Create a segment, keep it in the maps of channels
1006                         segment = make_shared<data::AnalogSegment>(
1007                                 *data, cur_samplerate_);
1008                         cur_analog_segments_[channel] = segment;
1009
1010                         // Push the segment into the analog data.
1011                         data->push_segment(segment);
1012                 }
1013
1014                 assert(segment);
1015
1016                 // Append the samples in the segment
1017                 segment->append_interleaved_samples(data++, sample_count,
1018                         channel_count);
1019         }
1020
1021         if (sweep_beginning) {
1022                 // This could be the first packet after a trigger
1023                 set_capture_state(Running);
1024         }
1025
1026         data_received();
1027 }
1028
1029 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1030         shared_ptr<Packet> packet)
1031 {
1032         static bool frame_began = false;
1033
1034         (void)device;
1035
1036         assert(device);
1037         assert(device == device_->device());
1038         assert(packet);
1039
1040         switch (packet->type()->id()) {
1041         case SR_DF_HEADER:
1042                 feed_in_header();
1043                 break;
1044
1045         case SR_DF_META:
1046                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1047                 break;
1048
1049         case SR_DF_TRIGGER:
1050                 feed_in_trigger();
1051                 break;
1052
1053         case SR_DF_FRAME_BEGIN:
1054                 feed_in_frame_begin();
1055                 frame_began = true;
1056                 break;
1057
1058         case SR_DF_LOGIC:
1059                 try {
1060                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1061                 } catch (bad_alloc) {
1062                         out_of_memory_ = true;
1063                         device_->stop();
1064                 }
1065                 break;
1066
1067         case SR_DF_ANALOG:
1068                 try {
1069                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1070                 } catch (bad_alloc) {
1071                         out_of_memory_ = true;
1072                         device_->stop();
1073                 }
1074                 break;
1075
1076         case SR_DF_FRAME_END:
1077         case SR_DF_END:
1078         {
1079                 {
1080                         lock_guard<recursive_mutex> lock(data_mutex_);
1081                         cur_logic_segment_.reset();
1082                         cur_analog_segments_.clear();
1083                 }
1084                 if (frame_began) {
1085                         frame_began = false;
1086                         frame_ended();
1087                 }
1088                 break;
1089         }
1090         default:
1091                 break;
1092         }
1093 }
1094
1095 void Session::on_data_saved()
1096 {
1097         data_saved_ = true;
1098 }
1099
1100 } // namespace pv