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 #ifdef _WIN32
  21 // Windows: Avoid boost/thread namespace pollution (which includes windows.h).
  22 #define NOGDI
  23 #define NORESOURCE
  24 #endif
  25 #include <boost/thread/locks.hpp>
  26 #include <boost/thread/shared_mutex.hpp>
  27
  28 #include <QFileInfo>
  29
  30 #include <cassert>
  31 #include <mutex>
  32 #include <stdexcept>
  33
  34 #include <sys/stat.h>
  35
  36 #include "session.hpp"
  37 #include "devicemanager.hpp"
  38
  39 #include "data/analog.hpp"
  40 #include "data/analogsegment.hpp"
  41 #include "data/decoderstack.hpp"
  42 #include "data/logic.hpp"
  43 #include "data/logicsegment.hpp"
  44 #include "data/signalbase.hpp"
  45 #include "data/decode/decoder.hpp"
  46
  47 #include "devices/hardwaredevice.hpp"
  48 #include "devices/inputfile.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::pair;
  76 using std::recursive_mutex;
  77 using std::set;
  78 using std::shared_ptr;
  79 using std::string;
  80 using std::unordered_set;
  81 using std::vector;
  82
  83 using sigrok::Analog;
  84 using sigrok::Channel;
  85 using sigrok::ChannelType;
  86 using sigrok::ConfigKey;
  87 using sigrok::DatafeedCallbackFunction;
  88 using sigrok::Error;
  89 using sigrok::Header;
  90 using sigrok::InputFormat;
  91 using sigrok::Logic;
  92 using sigrok::Meta;
  93 using sigrok::OutputFormat;
  94 using sigrok::Packet;
  95 using sigrok::PacketPayload;
  96 using sigrok::Session;
  97 using sigrok::SessionDevice;
  98
  99 using Glib::VariantBase;
 100 using Glib::Variant;
 101
 102 namespace pv {
 103 Session::Session(DeviceManager &device_manager, QString name) :
 104         device_manager_(device_manager),
 105         default_name_(name),
 106         name_(name),
 107         capture_state_(Stopped),
 108         cur_samplerate_(0)
 109 {
 110 }
 111
 112 Session::~Session()
 113 {
 114         // Stop and join to the thread
 115         stop_capture();
 116 }
 117
 118 DeviceManager& Session::device_manager()
 119 {
 120         return device_manager_;
 121 }
 122
 123 const DeviceManager& Session::device_manager() const
 124 {
 125         return device_manager_;
 126 }
 127
 128 shared_ptr<sigrok::Session> Session::session() const
 129 {
 130         if (!device_)
 131                 return shared_ptr<sigrok::Session>();
 132         return device_->session();
 133 }
 134
 135 shared_ptr<devices::Device> Session::device() const
 136 {
 137         return device_;
 138 }
 139
 140 QString Session::name() const
 141 {
 142         return name_;
 143 }
 144
 145 void Session::set_name(QString name)
 146 {
 147         if (default_name_.isEmpty())
 148                 default_name_ = name;
 149
 150         name_ = name;
 151
 152         name_changed();
 153 }
 154
 155 const std::list< std::shared_ptr<views::ViewBase> > Session::views() const
 156 {
 157         return views_;
 158 }
 159
 160 std::shared_ptr<views::ViewBase> Session::main_view() const
 161 {
 162         return main_view_;
 163 }
 164
 165 void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
 166 {
 167         main_bar_ = main_bar;
 168 }
 169
 170 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 171 {
 172         return main_bar_;
 173 }
 174
 175 void Session::save_settings(QSettings &settings) const
 176 {
 177         map<string, string> dev_info;
 178         list<string> key_list;
 179         int stacks = 0, views = 0;
 180
 181         if (device_) {
 182                 shared_ptr<devices::HardwareDevice> hw_device =
 183                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 184
 185                 if (hw_device) {
 186                         settings.setValue("device_type", "hardware");
 187                         settings.beginGroup("device");
 188
 189                         key_list.push_back("vendor");
 190                         key_list.push_back("model");
 191                         key_list.push_back("version");
 192                         key_list.push_back("serial_num");
 193                         key_list.push_back("connection_id");
 194
 195                         dev_info = device_manager_.get_device_info(device_);
 196
 197                         for (string key : key_list) {
 198                                 if (dev_info.count(key))
 199                                         settings.setValue(QString::fromUtf8(key.c_str()),
 200                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 201                                 else
 202                                         settings.remove(QString::fromUtf8(key.c_str()));
 203                         }
 204
 205                         settings.endGroup();
 206                 }
 207
 208                 shared_ptr<devices::SessionFile> sessionfile_device =
 209                         dynamic_pointer_cast< devices::SessionFile >(device_);
 210
 211                 if (sessionfile_device) {
 212                         settings.setValue("device_type", "sessionfile");
 213                         settings.beginGroup("device");
 214                         settings.setValue("filename", QString::fromStdString(
 215                                 sessionfile_device->full_name()));
 216                         settings.endGroup();
 217                 }
 218
 219                 // Save channels and decoders
 220                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 221 #ifdef ENABLE_DECODE
 222                         if (base->is_decode_signal()) {
 223                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 224                                                 base->decoder_stack();
 225                                 std::shared_ptr<data::decode::Decoder> top_decoder =
 226                                                 decoder_stack->stack().front();
 227
 228                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 229                                 settings.setValue("id", top_decoder->decoder()->id);
 230                                 settings.setValue("name", top_decoder->decoder()->name);
 231                                 settings.endGroup();
 232                         } else
 233 #endif
 234                         {
 235                                 settings.beginGroup(base->internal_name());
 236                                 base->save_settings(settings);
 237                                 settings.endGroup();
 238                         }
 239                 }
 240
 241                 settings.setValue("decoder_stacks", stacks);
 242
 243                 // Save view states and their signal settings
 244                 // Note: main_view must be saved as view0
 245                 settings.beginGroup("view" + QString::number(views++));
 246                 main_view_->save_settings(settings);
 247                 settings.endGroup();
 248
 249                 for (shared_ptr<views::ViewBase> view : views_) {
 250                         if (view != main_view_) {
 251                                 settings.beginGroup("view" + QString::number(views++));
 252                                 view->save_settings(settings);
 253                                 settings.endGroup();
 254                         }
 255                 }
 256
 257                 settings.setValue("views", views);
 258         }
 259 }
 260
 261 void Session::restore_settings(QSettings &settings)
 262 {
 263         shared_ptr<devices::Device> device;
 264
 265         QString device_type = settings.value("device_type").toString();
 266
 267         if (device_type == "hardware") {
 268                 map<string, string> dev_info;
 269                 list<string> key_list;
 270
 271                 // Re-select last used device if possible but only if it's not demo
 272                 settings.beginGroup("device");
 273                 key_list.push_back("vendor");
 274                 key_list.push_back("model");
 275                 key_list.push_back("version");
 276                 key_list.push_back("serial_num");
 277                 key_list.push_back("connection_id");
 278
 279                 for (string key : key_list) {
 280                         const QString k = QString::fromStdString(key);
 281                         if (!settings.contains(k))
 282                                 continue;
 283
 284                         const string value = settings.value(k).toString().toStdString();
 285                         if (!value.empty())
 286                                 dev_info.insert(std::make_pair(key, value));
 287                 }
 288
 289                 if (dev_info.count("model") > 0)
 290                         device = device_manager_.find_device_from_info(dev_info);
 291
 292                 if (device)
 293                         set_device(device);
 294
 295                 settings.endGroup();
 296         }
 297
 298         if (device_type == "sessionfile") {
 299                 settings.beginGroup("device");
 300                 QString filename = settings.value("filename").toString();
 301                 settings.endGroup();
 302
 303                 if (QFileInfo(filename).isReadable()) {
 304                         device = std::make_shared<devices::SessionFile>(device_manager_.context(),
 305                                 filename.toStdString());
 306                         set_device(device);
 307
 308                         // TODO Perform error handling
 309                         start_capture([](QString infoMessage) { (void)infoMessage; });
 310
 311                         set_name(QFileInfo(filename).fileName());
 312                 }
 313         }
 314
 315         if (device) {
 316                 // Restore channels
 317                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 318                         settings.beginGroup(base->internal_name());
 319                         base->restore_settings(settings);
 320                         settings.endGroup();
 321                 }
 322
 323                 // Restore decoders
 324 #ifdef ENABLE_DECODE
 325                 int stacks = settings.value("decoder_stacks").toInt();
 326
 327                 for (int i = 0; i < stacks; i++) {
 328                         settings.beginGroup("decoder_stack" + QString::number(i++));
 329
 330                         QString id = settings.value("id").toString();
 331                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 332
 333                         settings.endGroup();
 334                 }
 335 #endif
 336
 337                 // Restore views
 338                 int views = settings.value("views").toInt();
 339
 340                 for (int i = 0; i < views; i++) {
 341                         settings.beginGroup("view" + QString::number(i));
 342
 343                         if (i > 0) {
 344                                 views::ViewType type = (views::ViewType)settings.value("type").toInt();
 345                                 add_view(name_, type, this);
 346                                 views_.back()->restore_settings(settings);
 347                         } else
 348                                 main_view_->restore_settings(settings);
 349
 350                         settings.endGroup();
 351                 }
 352         }
 353 }
 354
 355 void Session::select_device(shared_ptr<devices::Device> device)
 356 {
 357         try {
 358                 if (device)
 359                         set_device(device);
 360                 else
 361                         set_default_device();
 362         } catch (const QString &e) {
 363                 main_bar_->session_error(tr("Failed to Select Device"),
 364                         tr("Failed to Select Device"));
 365         }
 366 }
 367
 368 void Session::set_device(shared_ptr<devices::Device> device)
 369 {
 370         assert(device);
 371
 372         // Ensure we are not capturing before setting the device
 373         stop_capture();
 374
 375         if (device_)
 376                 device_->close();
 377
 378         device_.reset();
 379
 380         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 381         name_ = default_name_;
 382         name_changed();
 383
 384         // Remove all stored data
 385         for (std::shared_ptr<views::ViewBase> view : views_) {
 386                 view->clear_signals();
 387 #ifdef ENABLE_DECODE
 388                 view->clear_decode_signals();
 389 #endif
 390         }
 391         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 392                 d->clear();
 393         all_signal_data_.clear();
 394         signalbases_.clear();
 395         cur_logic_segment_.reset();
 396
 397         for (auto entry : cur_analog_segments_) {
 398                 shared_ptr<sigrok::Channel>(entry.first).reset();
 399                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 400         }
 401
 402         logic_data_.reset();
 403
 404         signals_changed();
 405
 406         device_ = std::move(device);
 407
 408         try {
 409                 device_->open();
 410         } catch (const QString &e) {
 411                 device_.reset();
 412                 device_changed();
 413                 throw;
 414         }
 415
 416         device_->session()->add_datafeed_callback([=]
 417                 (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 418                         data_feed_in(device, packet);
 419                 });
 420
 421         update_signals();
 422         device_changed();
 423 }
 424
 425 void Session::set_default_device()
 426 {
 427         const list< shared_ptr<devices::HardwareDevice> > &devices =
 428                 device_manager_.devices();
 429
 430         if (devices.empty())
 431                 return;
 432
 433         // Try and find the demo device and select that by default
 434         const auto iter = std::find_if(devices.begin(), devices.end(),
 435                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 436                         return d->hardware_device()->driver()->name() ==
 437                         "demo"; });
 438         set_device((iter == devices.end()) ? devices.front() : *iter);
 439 }
 440
 441 void Session::load_init_file(const std::string &file_name,
 442         const std::string &format)
 443 {
 444         shared_ptr<InputFormat> input_format;
 445
 446         if (!format.empty()) {
 447                 const map<string, shared_ptr<InputFormat> > formats =
 448                         device_manager_.context()->input_formats();
 449                 const auto iter = find_if(formats.begin(), formats.end(),
 450                         [&](const pair<string, shared_ptr<InputFormat> > f) {
 451                                 return f.first == format; });
 452                 if (iter == formats.end()) {
 453                         main_bar_->session_error(tr("Error"),
 454                                 tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
 455                         return;
 456                 }
 457
 458                 input_format = (*iter).second;
 459         }
 460
 461         load_file(QString::fromStdString(file_name), input_format);
 462 }
 463
 464 void Session::load_file(QString file_name,
 465         std::shared_ptr<sigrok::InputFormat> format,
 466         const std::map<std::string, Glib::VariantBase> &options)
 467 {
 468         const QString errorMessage(
 469                 QString("Failed to load file %1").arg(file_name));
 470
 471         try {
 472                 if (format)
 473                         set_device(shared_ptr<devices::Device>(
 474                                 new devices::InputFile(
 475                                         device_manager_.context(),
 476                                         file_name.toStdString(),
 477                                         format, options)));
 478                 else
 479                         set_device(shared_ptr<devices::Device>(
 480                                 new devices::SessionFile(
 481                                         device_manager_.context(),
 482                                         file_name.toStdString())));
 483         } catch (Error e) {
 484                 main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
 485                 set_default_device();
 486                 main_bar_->update_device_list();
 487                 return;
 488         }
 489
 490         main_bar_->update_device_list();
 491
 492         start_capture([&, errorMessage](QString infoMessage) {
 493                 main_bar_->session_error(errorMessage, infoMessage); });
 494
 495         set_name(QFileInfo(file_name).fileName());
 496 }
 497
 498 Session::capture_state Session::get_capture_state() const
 499 {
 500         lock_guard<mutex> lock(sampling_mutex_);
 501         return capture_state_;
 502 }
 503
 504 void Session::start_capture(function<void (const QString)> error_handler)
 505 {
 506         if (!device_) {
 507                 error_handler(tr("No active device set, can't start acquisition."));
 508                 return;
 509         }
 510
 511         stop_capture();
 512
 513         // Check that at least one channel is enabled
 514         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 515         if (sr_dev) {
 516                 const auto channels = sr_dev->channels();
 517                 if (!std::any_of(channels.begin(), channels.end(),
 518                         [](shared_ptr<Channel> channel) {
 519                                 return channel->enabled(); })) {
 520                         error_handler(tr("No channels enabled."));
 521                         return;
 522                 }
 523         }
 524
 525         // Clear signal data
 526         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 527                 d->clear();
 528
 529         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 530         name_ = default_name_;
 531         name_changed();
 532
 533         // Begin the session
 534         sampling_thread_ = std::thread(
 535                 &Session::sample_thread_proc, this, error_handler);
 536 }
 537
 538 void Session::stop_capture()
 539 {
 540         if (get_capture_state() != Stopped)
 541                 device_->stop();
 542
 543         // Check that sampling stopped
 544         if (sampling_thread_.joinable())
 545                 sampling_thread_.join();
 546 }
 547
 548 void Session::register_view(std::shared_ptr<views::ViewBase> view)
 549 {
 550         if (views_.empty()) {
 551                 main_view_ = view;
 552         }
 553
 554         views_.push_back(view);
 555
 556         update_signals();
 557 }
 558
 559 void Session::deregister_view(std::shared_ptr<views::ViewBase> view)
 560 {
 561         views_.remove_if([&](std::shared_ptr<views::ViewBase> v) {
 562                 return v == view; });
 563
 564         if (views_.empty()) {
 565                 main_view_.reset();
 566
 567                 // Without a view there can be no main bar
 568                 main_bar_.reset();
 569         }
 570 }
 571
 572 bool Session::has_view(std::shared_ptr<views::ViewBase> view)
 573 {
 574         for (std::shared_ptr<views::ViewBase> v : views_)
 575                 if (v == view)
 576                         return true;
 577
 578         return false;
 579 }
 580
 581 double Session::get_samplerate() const
 582 {
 583         double samplerate = 0.0;
 584
 585         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 586                 assert(d);
 587                 const vector< shared_ptr<pv::data::Segment> > segments =
 588                         d->segments();
 589                 for (const shared_ptr<pv::data::Segment> &s : segments)
 590                         samplerate = std::max(samplerate, s->samplerate());
 591         }
 592         // If there is no sample rate given we use samples as unit
 593         if (samplerate == 0.0)
 594                 samplerate = 1.0;
 595
 596         return samplerate;
 597 }
 598
 599 const std::unordered_set< std::shared_ptr<data::SignalBase> >
 600         Session::signalbases() const
 601 {
 602         return signalbases_;
 603 }
 604
 605 #ifdef ENABLE_DECODE
 606 bool Session::add_decoder(srd_decoder *const dec)
 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 = shared_ptr<data::DecoderStack>(
 614                         new data::DecoderStack(*this, dec));
 615
 616                 // Make a list of all the channels
 617                 std::vector<const srd_channel*> all_channels;
 618                 for (const GSList *i = dec->channels; i; i = i->next)
 619                         all_channels.push_back((const srd_channel*)i->data);
 620                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 621                         all_channels.push_back((const srd_channel*)i->data);
 622
 623                 // Auto select the initial channels
 624                 for (const srd_channel *pdch : all_channels)
 625                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 626                                 if (b->type() == ChannelType::LOGIC) {
 627                                         if (QString::fromUtf8(pdch->name).toLower().
 628                                                 contains(b->name().toLower()))
 629                                                 channels[pdch] = b;
 630                                 }
 631                         }
 632
 633                 assert(decoder_stack);
 634                 assert(!decoder_stack->stack().empty());
 635                 assert(decoder_stack->stack().front());
 636                 decoder_stack->stack().front()->set_channels(channels);
 637
 638                 // Create the decode signal
 639                 shared_ptr<data::SignalBase> signalbase =
 640                         shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
 641
 642                 signalbase->set_decoder_stack(decoder_stack);
 643                 signalbases_.insert(signalbase);
 644
 645                 for (std::shared_ptr<views::ViewBase> view : views_)
 646                         view->add_decode_signal(signalbase);
 647         } catch (std::runtime_error e) {
 648                 return false;
 649         }
 650
 651         signals_changed();
 652
 653         // Do an initial decode
 654         decoder_stack->begin_decode();
 655
 656         return true;
 657 }
 658
 659 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 660 {
 661         signalbases_.erase(signalbase);
 662
 663         for (std::shared_ptr<views::ViewBase> view : views_)
 664                 view->remove_decode_signal(signalbase);
 665
 666         signals_changed();
 667 }
 668 #endif
 669
 670 void Session::set_capture_state(capture_state state)
 671 {
 672         bool changed;
 673
 674         {
 675                 lock_guard<mutex> lock(sampling_mutex_);
 676                 changed = capture_state_ != state;
 677                 capture_state_ = state;
 678         }
 679
 680         if (changed)
 681                 capture_state_changed(state);
 682 }
 683
 684 void Session::update_signals()
 685 {
 686         if (!device_) {
 687                 signalbases_.clear();
 688                 logic_data_.reset();
 689                 for (std::shared_ptr<views::ViewBase> view : views_) {
 690                         view->clear_signals();
 691 #ifdef ENABLE_DECODE
 692                         view->clear_decode_signals();
 693 #endif
 694                 }
 695                 return;
 696         }
 697
 698         lock_guard<recursive_mutex> lock(data_mutex_);
 699
 700         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 701         if (!sr_dev) {
 702                 signalbases_.clear();
 703                 logic_data_.reset();
 704                 for (std::shared_ptr<views::ViewBase> view : views_) {
 705                         view->clear_signals();
 706 #ifdef ENABLE_DECODE
 707                         view->clear_decode_signals();
 708 #endif
 709                 }
 710                 return;
 711         }
 712
 713         // Detect what data types we will receive
 714         auto channels = sr_dev->channels();
 715         unsigned int logic_channel_count = std::count_if(
 716                 channels.begin(), channels.end(),
 717                 [] (shared_ptr<Channel> channel) {
 718                         return channel->type() == ChannelType::LOGIC; });
 719
 720         // Create data containers for the logic data segments
 721         {
 722                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 723
 724                 if (logic_channel_count == 0) {
 725                         logic_data_.reset();
 726                 } else if (!logic_data_ ||
 727                         logic_data_->num_channels() != logic_channel_count) {
 728                         logic_data_.reset(new data::Logic(
 729                                 logic_channel_count));
 730                         assert(logic_data_);
 731                 }
 732         }
 733
 734         // Make the signals list
 735         for (std::shared_ptr<views::ViewBase> viewbase : views_) {
 736                 views::TraceView::View *trace_view =
 737                         qobject_cast<views::TraceView::View*>(viewbase.get());
 738
 739                 if (trace_view) {
 740                         unordered_set< shared_ptr<views::TraceView::Signal> >
 741                                 prev_sigs(trace_view->signals());
 742                         trace_view->clear_signals();
 743
 744                         for (auto channel : sr_dev->channels()) {
 745                                 shared_ptr<data::SignalBase> signalbase;
 746                                 shared_ptr<views::TraceView::Signal> signal;
 747
 748                                 // Find the channel in the old signals
 749                                 const auto iter = std::find_if(
 750                                         prev_sigs.cbegin(), prev_sigs.cend(),
 751                                         [&](const shared_ptr<views::TraceView::Signal> &s) {
 752                                                 return s->base()->channel() == channel;
 753                                         });
 754                                 if (iter != prev_sigs.end()) {
 755                                         // Copy the signal from the old set to the new
 756                                         signal = *iter;
 757                                         trace_view->add_signal(signal);
 758                                 } else {
 759                                         // Find the signalbase for this channel if possible
 760                                         signalbase.reset();
 761                                         for (const shared_ptr<data::SignalBase> b : signalbases_)
 762                                                 if (b->channel() == channel)
 763                                                         signalbase = b;
 764
 765                                         switch(channel->type()->id()) {
 766                                         case SR_CHANNEL_LOGIC:
 767                                                 if (!signalbase) {
 768                                                         signalbase = shared_ptr<data::SignalBase>(
 769                                                                 new data::SignalBase(channel));
 770                                                         signalbases_.insert(signalbase);
 771
 772                                                         all_signal_data_.insert(logic_data_);
 773                                                         signalbase->set_data(logic_data_);
 774                                                 }
 775
 776                                                 signal = shared_ptr<views::TraceView::Signal>(
 777                                                         new views::TraceView::LogicSignal(*this,
 778                                                                 device_, signalbase));
 779                                                 trace_view->add_signal(signal);
 780                                                 break;
 781
 782                                         case SR_CHANNEL_ANALOG:
 783                                         {
 784                                                 if (!signalbase) {
 785                                                         signalbase = shared_ptr<data::SignalBase>(
 786                                                                 new data::SignalBase(channel));
 787                                                         signalbases_.insert(signalbase);
 788
 789                                                         shared_ptr<data::Analog> data(new data::Analog());
 790                                                         all_signal_data_.insert(data);
 791                                                         signalbase->set_data(data);
 792                                                 }
 793
 794                                                 signal = shared_ptr<views::TraceView::Signal>(
 795                                                         new views::TraceView::AnalogSignal(
 796                                                                 *this, signalbase));
 797                                                 trace_view->add_signal(signal);
 798                                                 break;
 799                                         }
 800
 801                                         default:
 802                                                 assert(0);
 803                                                 break;
 804                                         }
 805                                 }
 806                         }
 807                 }
 808         }
 809
 810         signals_changed();
 811 }
 812
 813 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 814         shared_ptr<sigrok::Channel> channel) const
 815 {
 816         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 817                 assert(sig);
 818                 if (sig->channel() == channel)
 819                         return sig;
 820         }
 821         return shared_ptr<data::SignalBase>();
 822 }
 823
 824 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 825 {
 826         assert(error_handler);
 827
 828         if (!device_)
 829                 return;
 830
 831         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 832
 833         out_of_memory_ = false;
 834
 835         try {
 836                 device_->start();
 837         } catch (Error e) {
 838                 error_handler(e.what());
 839                 return;
 840         }
 841
 842         set_capture_state(device_->session()->trigger() ?
 843                 AwaitingTrigger : Running);
 844
 845         device_->run();
 846         set_capture_state(Stopped);
 847
 848         // Confirm that SR_DF_END was received
 849         if (cur_logic_segment_) {
 850                 qDebug("SR_DF_END was not received.");
 851                 assert(0);
 852         }
 853
 854         if (out_of_memory_)
 855                 error_handler(tr("Out of memory, acquisition stopped."));
 856 }
 857
 858 void Session::feed_in_header()
 859 {
 860         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 861 }
 862
 863 void Session::feed_in_meta(shared_ptr<Meta> meta)
 864 {
 865         for (auto entry : meta->config()) {
 866                 switch (entry.first->id()) {
 867                 case SR_CONF_SAMPLERATE:
 868                         // We can't rely on the header to always contain the sample rate,
 869                         // so in case it's supplied via a meta packet, we use it.
 870                         if (!cur_samplerate_)
 871                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 872
 873                         /// @todo handle samplerate changes
 874                         break;
 875                 default:
 876                         // Unknown metadata is not an error.
 877                         break;
 878                 }
 879         }
 880
 881         signals_changed();
 882 }
 883
 884 void Session::feed_in_trigger()
 885 {
 886         // The channel containing most samples should be most accurate
 887         uint64_t sample_count = 0;
 888
 889         {
 890                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 891                         assert(d);
 892                         uint64_t temp_count = 0;
 893
 894                         const vector< shared_ptr<pv::data::Segment> > segments =
 895                                 d->segments();
 896                         for (const shared_ptr<pv::data::Segment> &s : segments)
 897                                 temp_count += s->get_sample_count();
 898
 899                         if (temp_count > sample_count)
 900                                 sample_count = temp_count;
 901                 }
 902         }
 903
 904         trigger_event(sample_count / get_samplerate());
 905 }
 906
 907 void Session::feed_in_frame_begin()
 908 {
 909         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 910                 frame_began();
 911 }
 912
 913 void Session::feed_in_logic(shared_ptr<Logic> logic)
 914 {
 915         lock_guard<recursive_mutex> lock(data_mutex_);
 916
 917         const size_t sample_count = logic->data_length() / logic->unit_size();
 918
 919         if (!logic_data_) {
 920                 // The only reason logic_data_ would not have been created is
 921                 // if it was not possible to determine the signals when the
 922                 // device was created.
 923                 update_signals();
 924         }
 925
 926         if (!cur_logic_segment_) {
 927                 // This could be the first packet after a trigger
 928                 set_capture_state(Running);
 929
 930                 // Create a new data segment
 931                 cur_logic_segment_ = shared_ptr<data::LogicSegment>(
 932                         new data::LogicSegment(
 933                                 logic, cur_samplerate_, sample_count));
 934                 logic_data_->push_segment(cur_logic_segment_);
 935
 936                 // @todo Putting this here means that only listeners querying
 937                 // for logic will be notified. Currently the only user of
 938                 // frame_began is DecoderStack, but in future we need to signal
 939                 // this after both analog and logic sweeps have begun.
 940                 frame_began();
 941         } else {
 942                 // Append to the existing data segment
 943                 cur_logic_segment_->append_payload(logic);
 944         }
 945
 946         data_received();
 947 }
 948
 949 void Session::feed_in_analog(shared_ptr<Analog> analog)
 950 {
 951         lock_guard<recursive_mutex> lock(data_mutex_);
 952
 953         const vector<shared_ptr<Channel>> channels = analog->channels();
 954         const unsigned int channel_count = channels.size();
 955         const size_t sample_count = analog->num_samples() / channel_count;
 956         const float *data = static_cast<const float *>(analog->data_pointer());
 957         bool sweep_beginning = false;
 958
 959         if (signalbases_.empty())
 960                 update_signals();
 961
 962         for (auto channel : channels) {
 963                 shared_ptr<data::AnalogSegment> segment;
 964
 965                 // Try to get the segment of the channel
 966                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 967                         iterator iter = cur_analog_segments_.find(channel);
 968                 if (iter != cur_analog_segments_.end())
 969                         segment = (*iter).second;
 970                 else {
 971                         // If no segment was found, this means we haven't
 972                         // created one yet. i.e. this is the first packet
 973                         // in the sweep containing this segment.
 974                         sweep_beginning = true;
 975
 976                         // Create a segment, keep it in the maps of channels
 977                         segment = shared_ptr<data::AnalogSegment>(
 978                                 new data::AnalogSegment(
 979                                         cur_samplerate_, sample_count));
 980                         cur_analog_segments_[channel] = segment;
 981
 982                         // Find the analog data associated with the channel
 983                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 984                         assert(base);
 985
 986                         shared_ptr<data::Analog> data(base->analog_data());
 987                         assert(data);
 988
 989                         // Push the segment into the analog data.
 990                         data->push_segment(segment);
 991                 }
 992
 993                 assert(segment);
 994
 995                 // Append the samples in the segment
 996                 segment->append_interleaved_samples(data++, sample_count,
 997                         channel_count);
 998         }
 999
1000         if (sweep_beginning) {
1001                 // This could be the first packet after a trigger
1002                 set_capture_state(Running);
1003         }
1004
1005         data_received();
1006 }
1007
1008 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
1009         shared_ptr<Packet> packet)
1010 {
1011         (void)device;
1012
1013         assert(device);
1014         assert(device == device_->device());
1015         assert(packet);
1016
1017         switch (packet->type()->id()) {
1018         case SR_DF_HEADER:
1019                 feed_in_header();
1020                 break;
1021
1022         case SR_DF_META:
1023                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
1024                 break;
1025
1026         case SR_DF_TRIGGER:
1027                 feed_in_trigger();
1028                 break;
1029
1030         case SR_DF_FRAME_BEGIN:
1031                 feed_in_frame_begin();
1032                 break;
1033
1034         case SR_DF_LOGIC:
1035                 try {
1036                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
1037                 } catch (std::bad_alloc) {
1038                         out_of_memory_ = true;
1039                         device_->stop();
1040                 }
1041                 break;
1042
1043         case SR_DF_ANALOG:
1044                 try {
1045                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
1046                 } catch (std::bad_alloc) {
1047                         out_of_memory_ = true;
1048                         device_->stop();
1049                 }
1050                 break;
1051
1052         case SR_DF_END:
1053         {
1054                 {
1055                         lock_guard<recursive_mutex> lock(data_mutex_);
1056                         cur_logic_segment_.reset();
1057                         cur_analog_segments_.clear();
1058                 }
1059                 frame_ended();
1060                 break;
1061         }
1062         default:
1063                 break;
1064         }
1065 }
1066
1067 } // namespace pv