pv/session.cpp

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