pv/session.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifdef _WIN32
  22 // Windows: Avoid boost/thread namespace pollution (which includes windows.h).
  23 #define NOGDI
  24 #define NORESOURCE
  25 #endif
  26 #include <boost/thread/locks.hpp>
  27 #include <boost/thread/shared_mutex.hpp>
  28
  29 #include <QFileInfo>
  30
  31 #include <cassert>
  32 #include <mutex>
  33 #include <stdexcept>
  34
  35 #include <sys/stat.h>
  36
  37 #include "session.hpp"
  38 #include "devicemanager.hpp"
  39
  40 #include "data/analog.hpp"
  41 #include "data/analogsegment.hpp"
  42 #include "data/decoderstack.hpp"
  43 #include "data/logic.hpp"
  44 #include "data/logicsegment.hpp"
  45 #include "data/signalbase.hpp"
  46 #include "data/decode/decoder.hpp"
  47
  48 #include "devices/hardwaredevice.hpp"
  49 #include "devices/sessionfile.hpp"
  50
  51 #include "toolbars/mainbar.hpp"
  52
  53 #include "view/analogsignal.hpp"
  54 #include "view/decodetrace.hpp"
  55 #include "view/logicsignal.hpp"
  56 #include "view/signal.hpp"
  57 #include "view/view.hpp"
  58
  59 #include <libsigrokcxx/libsigrokcxx.hpp>
  60
  61 #ifdef ENABLE_DECODE
  62 #include <libsigrokdecode/libsigrokdecode.h>
  63 #endif
  64
  65 using boost::shared_lock;
  66 using boost::shared_mutex;
  67 using boost::unique_lock;
  68
  69 using std::dynamic_pointer_cast;
  70 using std::function;
  71 using std::lock_guard;
  72 using std::list;
  73 using std::map;
  74 using std::mutex;
  75 using std::recursive_mutex;
  76 using std::set;
  77 using std::shared_ptr;
  78 using std::string;
  79 using std::unordered_set;
  80 using std::vector;
  81
  82 using sigrok::Analog;
  83 using sigrok::Channel;
  84 using sigrok::ChannelType;
  85 using sigrok::ConfigKey;
  86 using sigrok::DatafeedCallbackFunction;
  87 using sigrok::Error;
  88 using sigrok::Header;
  89 using sigrok::Logic;
  90 using sigrok::Meta;
  91 using sigrok::Packet;
  92 using sigrok::PacketPayload;
  93 using sigrok::Session;
  94 using sigrok::SessionDevice;
  95
  96 using Glib::VariantBase;
  97 using Glib::Variant;
  98
  99 namespace pv {
 100 Session::Session(DeviceManager &device_manager, QString name) :
 101         device_manager_(device_manager),
 102         name_(name),
 103         capture_state_(Stopped),
 104         cur_samplerate_(0)
 105 {
 106 }
 107
 108 Session::~Session()
 109 {
 110         // Stop and join to the thread
 111         stop_capture();
 112 }
 113
 114 DeviceManager& Session::device_manager()
 115 {
 116         return device_manager_;
 117 }
 118
 119 const DeviceManager& Session::device_manager() const
 120 {
 121         return device_manager_;
 122 }
 123
 124 shared_ptr<sigrok::Session> Session::session() const
 125 {
 126         if (!device_)
 127                 return shared_ptr<sigrok::Session>();
 128         return device_->session();
 129 }
 130
 131 shared_ptr<devices::Device> Session::device() const
 132 {
 133         return device_;
 134 }
 135
 136 QString Session::name() const
 137 {
 138         return name_;
 139 }
 140
 141 void Session::set_name(QString name)
 142 {
 143         if (default_name_.isEmpty())
 144                 default_name_ = name;
 145
 146         name_ = name;
 147
 148         name_changed();
 149 }
 150
 151 std::shared_ptr<pv::view::View> Session::main_view() const
 152 {
 153         return main_view_;
 154 }
 155
 156 void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
 157 {
 158         main_bar_ = main_bar;
 159 }
 160
 161 shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 162 {
 163         return main_bar_;
 164 }
 165
 166 void Session::save_settings(QSettings &settings) const
 167 {
 168         map<string, string> dev_info;
 169         list<string> key_list;
 170         int stacks = 0, views = 0;
 171
 172         if (device_) {
 173                 shared_ptr<devices::HardwareDevice> hw_device =
 174                         dynamic_pointer_cast< devices::HardwareDevice >(device_);
 175
 176                 if (hw_device) {
 177                         settings.setValue("device_type", "hardware");
 178                         settings.beginGroup("device");
 179
 180                         key_list.push_back("vendor");
 181                         key_list.push_back("model");
 182                         key_list.push_back("version");
 183                         key_list.push_back("serial_num");
 184                         key_list.push_back("connection_id");
 185
 186                         dev_info = device_manager_.get_device_info(device_);
 187
 188                         for (string key : key_list) {
 189                                 if (dev_info.count(key))
 190                                         settings.setValue(QString::fromUtf8(key.c_str()),
 191                                                         QString::fromUtf8(dev_info.at(key).c_str()));
 192                                 else
 193                                         settings.remove(QString::fromUtf8(key.c_str()));
 194                         }
 195
 196                         settings.endGroup();
 197                 }
 198
 199                 shared_ptr<devices::SessionFile> sessionfile_device =
 200                         dynamic_pointer_cast< devices::SessionFile >(device_);
 201
 202                 if (sessionfile_device) {
 203                         settings.setValue("device_type", "sessionfile");
 204                         settings.beginGroup("device");
 205                         settings.setValue("filename", QString::fromStdString(
 206                                 sessionfile_device->full_name()));
 207                         settings.endGroup();
 208                 }
 209
 210                 // Save channels and decoders
 211                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 212 #ifdef ENABLE_DECODE
 213                         if (base->is_decode_signal()) {
 214                                 shared_ptr<pv::data::DecoderStack> decoder_stack =
 215                                                 base->decoder_stack();
 216                                 std::shared_ptr<data::decode::Decoder> top_decoder =
 217                                                 decoder_stack->stack().front();
 218
 219                                 settings.beginGroup("decoder_stack" + QString::number(stacks++));
 220                                 settings.setValue("id", top_decoder->decoder()->id);
 221                                 settings.setValue("name", top_decoder->decoder()->name);
 222                                 settings.endGroup();
 223                         } else
 224 #endif
 225                         {
 226                                 settings.beginGroup(base->internal_name());
 227                                 base->save_settings(settings);
 228                                 settings.endGroup();
 229                         }
 230                 }
 231
 232                 settings.setValue("decoder_stacks", stacks);
 233
 234                 // Save view states and their signal settings
 235                 // Note: main_view must be saved as view0
 236                 settings.beginGroup("view" + QString::number(views++));
 237                 main_view_->save_settings(settings);
 238                 settings.endGroup();
 239
 240                 for (shared_ptr<view::View> view : views_) {
 241                         if (view != main_view_) {
 242                                 settings.beginGroup("view" + QString::number(views++));
 243                                 view->save_settings(settings);
 244                                 settings.endGroup();
 245                         }
 246                 }
 247
 248                 settings.setValue("views", views);
 249         }
 250 }
 251
 252 void Session::restore_settings(QSettings &settings)
 253 {
 254         shared_ptr<devices::Device> device;
 255
 256         QString device_type = settings.value("device_type").toString();
 257
 258         if (device_type == "hardware") {
 259                 map<string, string> dev_info;
 260                 list<string> key_list;
 261
 262                 // Re-select last used device if possible but only if it's not demo
 263                 settings.beginGroup("device");
 264                 key_list.push_back("vendor");
 265                 key_list.push_back("model");
 266                 key_list.push_back("version");
 267                 key_list.push_back("serial_num");
 268                 key_list.push_back("connection_id");
 269
 270                 for (string key : key_list) {
 271                         const QString k = QString::fromStdString(key);
 272                         if (!settings.contains(k))
 273                                 continue;
 274
 275                         const string value = settings.value(k).toString().toStdString();
 276                         if (!value.empty())
 277                                 dev_info.insert(std::make_pair(key, value));
 278                 }
 279
 280                 if (dev_info.count("model") > 0)
 281                         device = device_manager_.find_device_from_info(dev_info);
 282
 283                 if (device)
 284                         set_device(device);
 285
 286                 settings.endGroup();
 287         }
 288
 289         if (device_type == "sessionfile") {
 290                 settings.beginGroup("device");
 291                 QString filename = settings.value("filename").toString();
 292                 settings.endGroup();
 293
 294                 if (QFileInfo(filename).isReadable()) {
 295                         device = std::make_shared<devices::SessionFile>(device_manager_.context(),
 296                                 filename.toStdString());
 297                         set_device(device);
 298                         set_name(filename);
 299
 300                         // TODO Perform error handling
 301                         start_capture([](QString infoMessage) { (void)infoMessage; });
 302                 }
 303         }
 304
 305         if (device) {
 306                 // Restore channels
 307                 for (shared_ptr<data::SignalBase> base : signalbases_) {
 308                         settings.beginGroup(base->internal_name());
 309                         base->restore_settings(settings);
 310                         settings.endGroup();
 311                 }
 312
 313                 // Restore decoders
 314 #ifdef ENABLE_DECODE
 315                 int stacks = settings.value("decoder_stacks").toInt();
 316
 317                 for (int i = 0; i < stacks; i++) {
 318                         settings.beginGroup("decoder_stack" + QString::number(i++));
 319
 320                         QString id = settings.value("id").toString();
 321                         add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
 322
 323                         settings.endGroup();
 324                 }
 325 #endif
 326
 327                 // Restore views
 328                 int views = settings.value("views").toInt();
 329
 330                 for (int i = 0; i < views; i++) {
 331                         settings.beginGroup("view" + QString::number(i));
 332
 333                         if (i > 0) {
 334                                 view::ViewType type = (view::ViewType)settings.value("type").toInt();
 335                                 add_view(name_, type, this);
 336                                 views_.back()->restore_settings(settings);
 337                         } else
 338                                 main_view_->restore_settings(settings);
 339
 340                         settings.endGroup();
 341                 }
 342         }
 343 }
 344
 345 void Session::set_device(shared_ptr<devices::Device> device)
 346 {
 347         assert(device);
 348
 349         // Ensure we are not capturing before setting the device
 350         stop_capture();
 351
 352         if (device_)
 353                 device_->close();
 354
 355         device_.reset();
 356
 357         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 358         name_ = default_name_;
 359         name_changed();
 360
 361         // Remove all stored data
 362         for (std::shared_ptr<pv::view::View> view : views_) {
 363                 view->clear_signals();
 364 #ifdef ENABLE_DECODE
 365                 view->clear_decode_traces();
 366 #endif
 367         }
 368         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 369                 d->clear();
 370         all_signal_data_.clear();
 371         signalbases_.clear();
 372         cur_logic_segment_.reset();
 373
 374         for (auto entry : cur_analog_segments_) {
 375                 shared_ptr<sigrok::Channel>(entry.first).reset();
 376                 shared_ptr<data::AnalogSegment>(entry.second).reset();
 377         }
 378
 379         logic_data_.reset();
 380
 381         signals_changed();
 382
 383         device_ = std::move(device);
 384
 385         try {
 386                 device_->open();
 387         } catch (const QString &e) {
 388                 device_.reset();
 389                 device_changed();
 390                 throw;
 391         }
 392
 393         device_->session()->add_datafeed_callback([=]
 394                 (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 395                         data_feed_in(device, packet);
 396                 });
 397
 398         update_signals();
 399         device_changed();
 400 }
 401
 402 void Session::set_default_device()
 403 {
 404         const list< shared_ptr<devices::HardwareDevice> > &devices =
 405                 device_manager_.devices();
 406
 407         if (devices.empty())
 408                 return;
 409
 410         // Try and find the demo device and select that by default
 411         const auto iter = std::find_if(devices.begin(), devices.end(),
 412                 [] (const shared_ptr<devices::HardwareDevice> &d) {
 413                         return d->hardware_device()->driver()->name() ==
 414                         "demo"; });
 415         set_device((iter == devices.end()) ? devices.front() : *iter);
 416 }
 417
 418 Session::capture_state Session::get_capture_state() const
 419 {
 420         lock_guard<mutex> lock(sampling_mutex_);
 421         return capture_state_;
 422 }
 423
 424 void Session::start_capture(function<void (const QString)> error_handler)
 425 {
 426         if (!device_) {
 427                 error_handler(tr("No active device set, can't start acquisition."));
 428                 return;
 429         }
 430
 431         stop_capture();
 432
 433         // Check that at least one channel is enabled
 434         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 435         if (sr_dev) {
 436                 const auto channels = sr_dev->channels();
 437                 if (!std::any_of(channels.begin(), channels.end(),
 438                         [](shared_ptr<Channel> channel) {
 439                                 return channel->enabled(); })) {
 440                         error_handler(tr("No channels enabled."));
 441                         return;
 442                 }
 443         }
 444
 445         // Clear signal data
 446         for (const shared_ptr<data::SignalData> d : all_signal_data_)
 447                 d->clear();
 448
 449         // Revert name back to default name (e.g. "Untitled-1") as the data is gone
 450         name_ = default_name_;
 451         name_changed();
 452
 453         // Begin the session
 454         sampling_thread_ = std::thread(
 455                 &Session::sample_thread_proc, this, error_handler);
 456 }
 457
 458 void Session::stop_capture()
 459 {
 460         if (get_capture_state() != Stopped)
 461                 device_->stop();
 462
 463         // Check that sampling stopped
 464         if (sampling_thread_.joinable())
 465                 sampling_thread_.join();
 466 }
 467
 468 void Session::register_view(std::shared_ptr<pv::view::View> view)
 469 {
 470         if (views_.empty()) {
 471                 main_view_ = view;
 472         }
 473
 474         views_.push_back(view);
 475 }
 476
 477 void Session::deregister_view(std::shared_ptr<pv::view::View> view)
 478 {
 479         views_.remove_if([&](std::shared_ptr<pv::view::View> v) {
 480                 return v == view; });
 481
 482         if (views_.empty()) {
 483                 main_view_.reset();
 484
 485                 // Without a view there can be no main bar
 486                 main_bar_.reset();
 487         }
 488 }
 489
 490 bool Session::has_view(std::shared_ptr<pv::view::View> view)
 491 {
 492         for (std::shared_ptr<pv::view::View> v : views_)
 493                 if (v == view)
 494                         return true;
 495
 496         return false;
 497 }
 498
 499 double Session::get_samplerate() const
 500 {
 501         double samplerate = 0.0;
 502
 503         for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 504                 assert(d);
 505                 const vector< shared_ptr<pv::data::Segment> > segments =
 506                         d->segments();
 507                 for (const shared_ptr<pv::data::Segment> &s : segments)
 508                         samplerate = std::max(samplerate, s->samplerate());
 509         }
 510         // If there is no sample rate given we use samples as unit
 511         if (samplerate == 0.0)
 512                 samplerate = 1.0;
 513
 514         return samplerate;
 515 }
 516
 517 const std::unordered_set< std::shared_ptr<data::SignalBase> >
 518         Session::signalbases() const
 519 {
 520         return signalbases_;
 521 }
 522
 523 #ifdef ENABLE_DECODE
 524 bool Session::add_decoder(srd_decoder *const dec)
 525 {
 526         map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
 527         shared_ptr<data::DecoderStack> decoder_stack;
 528
 529         try {
 530                 // Create the decoder
 531                 decoder_stack = shared_ptr<data::DecoderStack>(
 532                         new data::DecoderStack(*this, dec));
 533
 534                 // Make a list of all the channels
 535                 std::vector<const srd_channel*> all_channels;
 536                 for (const GSList *i = dec->channels; i; i = i->next)
 537                         all_channels.push_back((const srd_channel*)i->data);
 538                 for (const GSList *i = dec->opt_channels; i; i = i->next)
 539                         all_channels.push_back((const srd_channel*)i->data);
 540
 541                 // Auto select the initial channels
 542                 for (const srd_channel *pdch : all_channels)
 543                         for (shared_ptr<data::SignalBase> b : signalbases_) {
 544                                 if (b->type() == ChannelType::LOGIC) {
 545                                         if (QString::fromUtf8(pdch->name).toLower().
 546                                                 contains(b->name().toLower()))
 547                                                 channels[pdch] = b;
 548                                 }
 549                         }
 550
 551                 assert(decoder_stack);
 552                 assert(!decoder_stack->stack().empty());
 553                 assert(decoder_stack->stack().front());
 554                 decoder_stack->stack().front()->set_channels(channels);
 555
 556                 // Create the decode signal
 557                 shared_ptr<data::SignalBase> signalbase =
 558                         shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
 559
 560                 signalbase->set_decoder_stack(decoder_stack);
 561                 signalbases_.insert(signalbase);
 562
 563                 for (std::shared_ptr<pv::view::View> view : views_)
 564                         view->add_decode_trace(signalbase);
 565         } catch (std::runtime_error e) {
 566                 return false;
 567         }
 568
 569         signals_changed();
 570
 571         // Do an initial decode
 572         decoder_stack->begin_decode();
 573
 574         return true;
 575 }
 576
 577 void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
 578 {
 579         for (std::shared_ptr<pv::view::View> view : views_)
 580                 view->remove_decode_trace(signalbase);
 581 }
 582 #endif
 583
 584 void Session::set_capture_state(capture_state state)
 585 {
 586         bool changed;
 587
 588         {
 589                 lock_guard<mutex> lock(sampling_mutex_);
 590                 changed = capture_state_ != state;
 591                 capture_state_ = state;
 592         }
 593
 594         if (changed)
 595                 capture_state_changed(state);
 596 }
 597
 598 void Session::update_signals()
 599 {
 600         if (!device_) {
 601                 signalbases_.clear();
 602                 logic_data_.reset();
 603                 for (std::shared_ptr<pv::view::View> view : views_) {
 604                         view->clear_signals();
 605 #ifdef ENABLE_DECODE
 606                         view->clear_decode_traces();
 607 #endif
 608                 }
 609                 return;
 610         }
 611
 612         lock_guard<recursive_mutex> lock(data_mutex_);
 613
 614         const shared_ptr<sigrok::Device> sr_dev = device_->device();
 615         if (!sr_dev) {
 616                 signalbases_.clear();
 617                 logic_data_.reset();
 618                 for (std::shared_ptr<pv::view::View> view : views_) {
 619                         view->clear_signals();
 620 #ifdef ENABLE_DECODE
 621                         view->clear_decode_traces();
 622 #endif
 623                 }
 624                 return;
 625         }
 626
 627         // Detect what data types we will receive
 628         auto channels = sr_dev->channels();
 629         unsigned int logic_channel_count = std::count_if(
 630                 channels.begin(), channels.end(),
 631                 [] (shared_ptr<Channel> channel) {
 632                         return channel->type() == ChannelType::LOGIC; });
 633
 634         // Create data containers for the logic data segments
 635         {
 636                 lock_guard<recursive_mutex> data_lock(data_mutex_);
 637
 638                 if (logic_channel_count == 0) {
 639                         logic_data_.reset();
 640                 } else if (!logic_data_ ||
 641                         logic_data_->num_channels() != logic_channel_count) {
 642                         logic_data_.reset(new data::Logic(
 643                                 logic_channel_count));
 644                         assert(logic_data_);
 645                 }
 646         }
 647
 648         // Make the signals list
 649         for (std::shared_ptr<pv::view::View> view : views_) {
 650                 unordered_set< shared_ptr<view::Signal> > prev_sigs(view->signals());
 651                 view->clear_signals();
 652
 653                 for (auto channel : sr_dev->channels()) {
 654                         shared_ptr<data::SignalBase> signalbase;
 655                         shared_ptr<view::Signal> signal;
 656
 657                         // Find the channel in the old signals
 658                         const auto iter = std::find_if(
 659                                 prev_sigs.cbegin(), prev_sigs.cend(),
 660                                 [&](const shared_ptr<view::Signal> &s) {
 661                                         return s->base()->channel() == channel;
 662                                 });
 663                         if (iter != prev_sigs.end()) {
 664                                 // Copy the signal from the old set to the new
 665                                 signal = *iter;
 666                         } else {
 667                                 // Find the signalbase for this channel if possible
 668                                 signalbase.reset();
 669                                 for (const shared_ptr<data::SignalBase> b : signalbases_)
 670                                         if (b->channel() == channel)
 671                                                 signalbase = b;
 672
 673                                 switch(channel->type()->id()) {
 674                                 case SR_CHANNEL_LOGIC:
 675                                         if (!signalbase) {
 676                                                 signalbase = shared_ptr<data::SignalBase>(
 677                                                         new data::SignalBase(channel));
 678                                                 signalbases_.insert(signalbase);
 679
 680                                                 all_signal_data_.insert(logic_data_);
 681                                                 signalbase->set_data(logic_data_);
 682                                         }
 683
 684                                         signal = shared_ptr<view::Signal>(
 685                                                 new view::LogicSignal(*this,
 686                                                         device_, signalbase));
 687                                         view->add_signal(signal);
 688                                         break;
 689
 690                                 case SR_CHANNEL_ANALOG:
 691                                 {
 692                                         if (!signalbase) {
 693                                                 signalbase = shared_ptr<data::SignalBase>(
 694                                                         new data::SignalBase(channel));
 695                                                 signalbases_.insert(signalbase);
 696
 697                                                 shared_ptr<data::Analog> data(new data::Analog());
 698                                                 all_signal_data_.insert(data);
 699                                                 signalbase->set_data(data);
 700                                         }
 701
 702                                         signal = shared_ptr<view::Signal>(
 703                                                 new view::AnalogSignal(
 704                                                         *this, signalbase));
 705                                         view->add_signal(signal);
 706                                         break;
 707                                 }
 708
 709                                 default:
 710                                         assert(0);
 711                                         break;
 712                                 }
 713                         }
 714                 }
 715         }
 716
 717         signals_changed();
 718 }
 719
 720 shared_ptr<data::SignalBase> Session::signalbase_from_channel(
 721         shared_ptr<sigrok::Channel> channel) const
 722 {
 723         for (shared_ptr<data::SignalBase> sig : signalbases_) {
 724                 assert(sig);
 725                 if (sig->channel() == channel)
 726                         return sig;
 727         }
 728         return shared_ptr<data::SignalBase>();
 729 }
 730
 731 void Session::sample_thread_proc(function<void (const QString)> error_handler)
 732 {
 733         assert(error_handler);
 734
 735         if (!device_)
 736                 return;
 737
 738         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 739
 740         out_of_memory_ = false;
 741
 742         try {
 743                 device_->start();
 744         } catch (Error e) {
 745                 error_handler(e.what());
 746                 return;
 747         }
 748
 749         set_capture_state(device_->session()->trigger() ?
 750                 AwaitingTrigger : Running);
 751
 752         device_->run();
 753         set_capture_state(Stopped);
 754
 755         // Confirm that SR_DF_END was received
 756         if (cur_logic_segment_) {
 757                 qDebug("SR_DF_END was not received.");
 758                 assert(0);
 759         }
 760
 761         if (out_of_memory_)
 762                 error_handler(tr("Out of memory, acquisition stopped."));
 763 }
 764
 765 void Session::feed_in_header()
 766 {
 767         cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
 768 }
 769
 770 void Session::feed_in_meta(shared_ptr<Meta> meta)
 771 {
 772         for (auto entry : meta->config()) {
 773                 switch (entry.first->id()) {
 774                 case SR_CONF_SAMPLERATE:
 775                         // We can't rely on the header to always contain the sample rate,
 776                         // so in case it's supplied via a meta packet, we use it.
 777                         if (!cur_samplerate_)
 778                                 cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 779
 780                         /// @todo handle samplerate changes
 781                         break;
 782                 default:
 783                         // Unknown metadata is not an error.
 784                         break;
 785                 }
 786         }
 787
 788         signals_changed();
 789 }
 790
 791 void Session::feed_in_trigger()
 792 {
 793         // The channel containing most samples should be most accurate
 794         uint64_t sample_count = 0;
 795
 796         {
 797                 for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
 798                         assert(d);
 799                         uint64_t temp_count = 0;
 800
 801                         const vector< shared_ptr<pv::data::Segment> > segments =
 802                                 d->segments();
 803                         for (const shared_ptr<pv::data::Segment> &s : segments)
 804                                 temp_count += s->get_sample_count();
 805
 806                         if (temp_count > sample_count)
 807                                 sample_count = temp_count;
 808                 }
 809         }
 810
 811         trigger_event(sample_count / get_samplerate());
 812 }
 813
 814 void Session::feed_in_frame_begin()
 815 {
 816         if (cur_logic_segment_ || !cur_analog_segments_.empty())
 817                 frame_began();
 818 }
 819
 820 void Session::feed_in_logic(shared_ptr<Logic> logic)
 821 {
 822         lock_guard<recursive_mutex> lock(data_mutex_);
 823
 824         const size_t sample_count = logic->data_length() / logic->unit_size();
 825
 826         if (!logic_data_) {
 827                 // The only reason logic_data_ would not have been created is
 828                 // if it was not possible to determine the signals when the
 829                 // device was created.
 830                 update_signals();
 831         }
 832
 833         if (!cur_logic_segment_) {
 834                 // This could be the first packet after a trigger
 835                 set_capture_state(Running);
 836
 837                 // Create a new data segment
 838                 cur_logic_segment_ = shared_ptr<data::LogicSegment>(
 839                         new data::LogicSegment(
 840                                 logic, cur_samplerate_, sample_count));
 841                 logic_data_->push_segment(cur_logic_segment_);
 842
 843                 // @todo Putting this here means that only listeners querying
 844                 // for logic will be notified. Currently the only user of
 845                 // frame_began is DecoderStack, but in future we need to signal
 846                 // this after both analog and logic sweeps have begun.
 847                 frame_began();
 848         } else {
 849                 // Append to the existing data segment
 850                 cur_logic_segment_->append_payload(logic);
 851         }
 852
 853         data_received();
 854 }
 855
 856 void Session::feed_in_analog(shared_ptr<Analog> analog)
 857 {
 858         lock_guard<recursive_mutex> lock(data_mutex_);
 859
 860         const vector<shared_ptr<Channel>> channels = analog->channels();
 861         const unsigned int channel_count = channels.size();
 862         const size_t sample_count = analog->num_samples() / channel_count;
 863         const float *data = static_cast<const float *>(analog->data_pointer());
 864         bool sweep_beginning = false;
 865
 866         if (signalbases_.empty())
 867                 update_signals();
 868
 869         for (auto channel : channels) {
 870                 shared_ptr<data::AnalogSegment> segment;
 871
 872                 // Try to get the segment of the channel
 873                 const map< shared_ptr<Channel>, shared_ptr<data::AnalogSegment> >::
 874                         iterator iter = cur_analog_segments_.find(channel);
 875                 if (iter != cur_analog_segments_.end())
 876                         segment = (*iter).second;
 877                 else {
 878                         // If no segment was found, this means we haven't
 879                         // created one yet. i.e. this is the first packet
 880                         // in the sweep containing this segment.
 881                         sweep_beginning = true;
 882
 883                         // Create a segment, keep it in the maps of channels
 884                         segment = shared_ptr<data::AnalogSegment>(
 885                                 new data::AnalogSegment(
 886                                         cur_samplerate_, sample_count));
 887                         cur_analog_segments_[channel] = segment;
 888
 889                         // Find the analog data associated with the channel
 890                         shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 891                         assert(base);
 892
 893                         shared_ptr<data::Analog> data(base->analog_data());
 894                         assert(data);
 895
 896                         // Push the segment into the analog data.
 897                         data->push_segment(segment);
 898                 }
 899
 900                 assert(segment);
 901
 902                 // Append the samples in the segment
 903                 segment->append_interleaved_samples(data++, sample_count,
 904                         channel_count);
 905         }
 906
 907         if (sweep_beginning) {
 908                 // This could be the first packet after a trigger
 909                 set_capture_state(Running);
 910         }
 911
 912         data_received();
 913 }
 914
 915 void Session::data_feed_in(shared_ptr<sigrok::Device> device,
 916         shared_ptr<Packet> packet)
 917 {
 918         (void)device;
 919
 920         assert(device);
 921         assert(device == device_->device());
 922         assert(packet);
 923
 924         switch (packet->type()->id()) {
 925         case SR_DF_HEADER:
 926                 feed_in_header();
 927                 break;
 928
 929         case SR_DF_META:
 930                 feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
 931                 break;
 932
 933         case SR_DF_TRIGGER:
 934                 feed_in_trigger();
 935                 break;
 936
 937         case SR_DF_FRAME_BEGIN:
 938                 feed_in_frame_begin();
 939                 break;
 940
 941         case SR_DF_LOGIC:
 942                 try {
 943                         feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
 944                 } catch (std::bad_alloc) {
 945                         out_of_memory_ = true;
 946                         device_->stop();
 947                 }
 948                 break;
 949
 950         case SR_DF_ANALOG:
 951                 try {
 952                         feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
 953                 } catch (std::bad_alloc) {
 954                         out_of_memory_ = true;
 955                         device_->stop();
 956                 }
 957                 break;
 958
 959         case SR_DF_END:
 960         {
 961                 {
 962                         lock_guard<recursive_mutex> lock(data_mutex_);
 963                         cur_logic_segment_.reset();
 964                         cur_analog_segments_.clear();
 965                 }
 966                 frame_ended();
 967                 break;
 968         }
 969         default:
 970                 break;
 971         }
 972 }
 973
 974 } // namespace pv