pv/data/signalbase.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  * Copyright (C) 2016 Soeren Apel <soeren@apelpie.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "analog.hpp"
  22 #include "analogsegment.hpp"
  23 #include "decode/row.hpp"
  24 #include "logic.hpp"
  25 #include "logicsegment.hpp"
  26 #include "signalbase.hpp"
  27 #include "signaldata.hpp"
  28
  29 #include <QDebug>
  30
  31 #include <pv/binding/decoder.hpp>
  32 #include <pv/session.hpp>
  33
  34 using std::dynamic_pointer_cast;
  35 using std::make_shared;
  36 using std::out_of_range;
  37 using std::shared_ptr;
  38 using std::tie;
  39 using std::unique_lock;
  40
  41 namespace pv {
  42 namespace data {
  43
  44 const int SignalBase::ColorBGAlpha = 8 * 256 / 100;
  45 const uint64_t SignalBase::ConversionBlockSize = 4096;
  46 const uint32_t SignalBase::ConversionDelay = 1000;  // 1 second
  47
  48 SignalBase::SignalBase(shared_ptr<sigrok::Channel> channel, ChannelType channel_type) :
  49         channel_(channel),
  50         channel_type_(channel_type),
  51         conversion_type_(NoConversion),
  52         min_value_(0),
  53         max_value_(0)
  54 {
  55         if (channel_)
  56                 internal_name_ = QString::fromStdString(channel_->name());
  57
  58         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
  59                 this, SLOT(on_delayed_conversion_start()));
  60         delayed_conversion_starter_.setSingleShot(true);
  61         delayed_conversion_starter_.setInterval(ConversionDelay);
  62 }
  63
  64 SignalBase::~SignalBase()
  65 {
  66         stop_conversion();
  67 }
  68
  69 shared_ptr<sigrok::Channel> SignalBase::channel() const
  70 {
  71         return channel_;
  72 }
  73
  74 QString SignalBase::name() const
  75 {
  76         return (channel_) ? QString::fromStdString(channel_->name()) : name_;
  77 }
  78
  79 QString SignalBase::internal_name() const
  80 {
  81         return internal_name_;
  82 }
  83
  84 QString SignalBase::display_name() const
  85 {
  86         if (name() != internal_name_)
  87                 return name() + " (" + internal_name_ + ")";
  88         else
  89                 return name();
  90 }
  91
  92 void SignalBase::set_name(QString name)
  93 {
  94         if (channel_)
  95                 channel_->set_name(name.toUtf8().constData());
  96
  97         name_ = name;
  98
  99         name_changed(name);
 100 }
 101
 102 bool SignalBase::enabled() const
 103 {
 104         return (channel_) ? channel_->enabled() : true;
 105 }
 106
 107 void SignalBase::set_enabled(bool value)
 108 {
 109         if (channel_) {
 110                 channel_->set_enabled(value);
 111                 enabled_changed(value);
 112         }
 113 }
 114
 115 SignalBase::ChannelType SignalBase::type() const
 116 {
 117         return channel_type_;
 118 }
 119
 120 unsigned int SignalBase::index() const
 121 {
 122         return (channel_) ? channel_->index() : 0;
 123 }
 124
 125 unsigned int SignalBase::logic_bit_index() const
 126 {
 127         if (channel_type_ == LogicChannel)
 128                 return channel_->index();
 129         else
 130                 return 0;
 131 }
 132
 133 QColor SignalBase::color() const
 134 {
 135         return color_;
 136 }
 137
 138 void SignalBase::set_color(QColor color)
 139 {
 140         color_ = color;
 141
 142         bgcolor_ = color;
 143         bgcolor_.setAlpha(ColorBGAlpha);
 144
 145         color_changed(color);
 146 }
 147
 148 QColor SignalBase::bgcolor() const
 149 {
 150         return bgcolor_;
 151 }
 152
 153 void SignalBase::set_data(shared_ptr<pv::data::SignalData> data)
 154 {
 155         if (data_) {
 156                 disconnect(data.get(), SIGNAL(samples_cleared()),
 157                         this, SLOT(on_samples_cleared()));
 158                 disconnect(data.get(), SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 159                         this, SLOT(on_samples_added(QObject*, uint64_t, uint64_t)));
 160
 161                 if (channel_type_ == AnalogChannel) {
 162                         shared_ptr<Analog> analog = analog_data();
 163                         assert(analog);
 164
 165                         disconnect(analog.get(), SIGNAL(min_max_changed(float, float)),
 166                                 this, SLOT(on_min_max_changed(float, float)));
 167                 }
 168         }
 169
 170         data_ = data;
 171
 172         if (data_) {
 173                 connect(data.get(), SIGNAL(samples_cleared()),
 174                         this, SLOT(on_samples_cleared()));
 175                 connect(data.get(), SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 176                         this, SLOT(on_samples_added(QObject*, uint64_t, uint64_t)));
 177
 178                 if (channel_type_ == AnalogChannel) {
 179                         shared_ptr<Analog> analog = analog_data();
 180                         assert(analog);
 181
 182                         connect(analog.get(), SIGNAL(min_max_changed(float, float)),
 183                                 this, SLOT(on_min_max_changed(float, float)));
 184                 }
 185         }
 186 }
 187
 188 shared_ptr<data::Analog> SignalBase::analog_data() const
 189 {
 190         shared_ptr<Analog> result = nullptr;
 191
 192         if (channel_type_ == AnalogChannel)
 193                 result = dynamic_pointer_cast<Analog>(data_);
 194
 195         return result;
 196 }
 197
 198 shared_ptr<data::Logic> SignalBase::logic_data() const
 199 {
 200         shared_ptr<Logic> result = nullptr;
 201
 202         if (channel_type_ == LogicChannel)
 203                 result = dynamic_pointer_cast<Logic>(data_);
 204
 205         if (((conversion_type_ == A2LConversionByThreshold) ||
 206                 (conversion_type_ == A2LConversionBySchmittTrigger)))
 207                 result = dynamic_pointer_cast<Logic>(converted_data_);
 208
 209         return result;
 210 }
 211
 212 bool SignalBase::segment_is_complete(uint32_t segment_id) const
 213 {
 214         bool result = true;
 215
 216         if (channel_type_ == AnalogChannel)
 217         {
 218                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 219                 auto segments = data->analog_segments();
 220                 try {
 221                         result = segments.at(segment_id)->is_complete();
 222                 } catch (out_of_range&) {
 223                         // Do nothing
 224                 }
 225         }
 226
 227         if (channel_type_ == LogicChannel)
 228         {
 229                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 230                 auto segments = data->logic_segments();
 231                 try {
 232                         result = segments.at(segment_id)->is_complete();
 233                 } catch (out_of_range&) {
 234                         // Do nothing
 235                 }
 236         }
 237
 238         return result;
 239 }
 240
 241 bool SignalBase::has_samples() const
 242 {
 243         bool result = false;
 244
 245         if (channel_type_ == AnalogChannel)
 246         {
 247                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 248                 if (data) {
 249                         auto segments = data->analog_segments();
 250                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 251                                 result = true;
 252                 }
 253         }
 254
 255         if (channel_type_ == LogicChannel)
 256         {
 257                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 258                 if (data) {
 259                         auto segments = data->logic_segments();
 260                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 261                                 result = true;
 262                 }
 263         }
 264
 265         return result;
 266 }
 267
 268 double SignalBase::get_samplerate() const
 269 {
 270         if (channel_type_ == AnalogChannel)
 271         {
 272                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 273                 if (data)
 274                         return data->get_samplerate();
 275         }
 276
 277         if (channel_type_ == LogicChannel)
 278         {
 279                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 280                 if (data)
 281                         return data->get_samplerate();
 282         }
 283
 284         // Default samplerate is 1 Hz
 285         return 1.0;
 286 }
 287
 288 SignalBase::ConversionType SignalBase::get_conversion_type() const
 289 {
 290         return conversion_type_;
 291 }
 292
 293 void SignalBase::set_conversion_type(ConversionType t)
 294 {
 295         if (conversion_type_ != NoConversion) {
 296                 stop_conversion();
 297
 298                 // Discard converted data
 299                 converted_data_.reset();
 300                 samples_cleared();
 301         }
 302
 303         conversion_type_ = t;
 304
 305         // Re-create an empty container
 306         // so that the signal is recognized as providing logic data
 307         // and thus can be assigned to a decoder
 308         if (conversion_is_a2l())
 309                 if (!converted_data_)
 310                         converted_data_ = make_shared<Logic>(1);  // Contains only one channel
 311
 312         start_conversion();
 313
 314         conversion_type_changed(t);
 315 }
 316
 317 map<QString, QVariant> SignalBase::get_conversion_options() const
 318 {
 319         return conversion_options_;
 320 }
 321
 322 bool SignalBase::set_conversion_option(QString key, QVariant value)
 323 {
 324         QVariant old_value;
 325
 326         auto key_iter = conversion_options_.find(key);
 327         if (key_iter != conversion_options_.end())
 328                 old_value = key_iter->second;
 329
 330         conversion_options_[key] = value;
 331
 332         return (value != old_value);
 333 }
 334
 335 vector<double> SignalBase::get_conversion_thresholds(const ConversionType t,
 336         const bool always_custom) const
 337 {
 338         vector<double> result;
 339         ConversionType conv_type = t;
 340         ConversionPreset preset;
 341
 342         // Use currently active conversion if no conversion type was supplied
 343         if (conv_type == NoConversion)
 344                 conv_type = conversion_type_;
 345
 346         if (always_custom)
 347                 preset = NoPreset;
 348         else
 349                 preset = get_current_conversion_preset();
 350
 351         if (conv_type == A2LConversionByThreshold) {
 352                 double thr = 0;
 353
 354                 if (preset == NoPreset) {
 355                         auto thr_iter = conversion_options_.find("threshold_value");
 356                         if (thr_iter != conversion_options_.end())
 357                                 thr = (thr_iter->second).toDouble();
 358                 }
 359
 360                 if (preset == DynamicPreset)
 361                         thr = (min_value_ + max_value_) * 0.5;  // middle between min and max
 362
 363                 if ((int)preset == 1) thr = 0.9;
 364                 if ((int)preset == 2) thr = 1.8;
 365                 if ((int)preset == 3) thr = 2.5;
 366                 if ((int)preset == 4) thr = 1.5;
 367
 368                 result.push_back(thr);
 369         }
 370
 371         if (conv_type == A2LConversionBySchmittTrigger) {
 372                 double thr_lo = 0, thr_hi = 0;
 373
 374                 if (preset == NoPreset) {
 375                         auto thr_lo_iter = conversion_options_.find("threshold_value_low");
 376                         if (thr_lo_iter != conversion_options_.end())
 377                                 thr_lo = (thr_lo_iter->second).toDouble();
 378
 379                         auto thr_hi_iter = conversion_options_.find("threshold_value_high");
 380                         if (thr_hi_iter != conversion_options_.end())
 381                                 thr_hi = (thr_hi_iter->second).toDouble();
 382                 }
 383
 384                 if (preset == DynamicPreset) {
 385                         const double amplitude = max_value_ - min_value_;
 386                         const double center = min_value_ + (amplitude / 2);
 387                         thr_lo = center - (amplitude * 0.15);  // 15% margin
 388                         thr_hi = center + (amplitude * 0.15);  // 15% margin
 389                 }
 390
 391                 if ((int)preset == 1) { thr_lo = 0.3; thr_hi = 1.2; }
 392                 if ((int)preset == 2) { thr_lo = 0.7; thr_hi = 2.5; }
 393                 if ((int)preset == 3) { thr_lo = 1.3; thr_hi = 3.7; }
 394                 if ((int)preset == 4) { thr_lo = 0.8; thr_hi = 2.0; }
 395
 396                 result.push_back(thr_lo);
 397                 result.push_back(thr_hi);
 398         }
 399
 400         return result;
 401 }
 402
 403 vector< pair<QString, int> > SignalBase::get_conversion_presets() const
 404 {
 405         vector< pair<QString, int> > presets;
 406
 407         if (conversion_type_ == A2LConversionByThreshold) {
 408                 // Source: http://www.interfacebus.com/voltage_threshold.html
 409                 presets.emplace_back(tr("Signal average"), 0);
 410                 presets.emplace_back(tr("0.9V (for 1.8V CMOS)"), 1);
 411                 presets.emplace_back(tr("1.8V (for 3.3V CMOS)"), 2);
 412                 presets.emplace_back(tr("2.5V (for 5.0V CMOS)"), 3);
 413                 presets.emplace_back(tr("1.5V (for TTL)"), 4);
 414         }
 415
 416         if (conversion_type_ == A2LConversionBySchmittTrigger) {
 417                 // Source: http://www.interfacebus.com/voltage_threshold.html
 418                 presets.emplace_back(tr("Signal average +/- 15%"), 0);
 419                 presets.emplace_back(tr("0.3V/1.2V (for 1.8V CMOS)"), 1);
 420                 presets.emplace_back(tr("0.7V/2.5V (for 3.3V CMOS)"), 2);
 421                 presets.emplace_back(tr("1.3V/3.7V (for 5.0V CMOS)"), 3);
 422                 presets.emplace_back(tr("0.8V/2.0V (for TTL)"), 4);
 423         }
 424
 425         return presets;
 426 }
 427
 428 SignalBase::ConversionPreset SignalBase::get_current_conversion_preset() const
 429 {
 430         auto preset = conversion_options_.find("preset");
 431         if (preset != conversion_options_.end())
 432                 return (ConversionPreset)((preset->second).toInt());
 433
 434         return DynamicPreset;
 435 }
 436
 437 void SignalBase::set_conversion_preset(ConversionPreset id)
 438 {
 439         conversion_options_["preset"] = (int)id;
 440 }
 441
 442 #ifdef ENABLE_DECODE
 443 bool SignalBase::is_decode_signal() const
 444 {
 445         return (channel_type_ == DecodeChannel);
 446 }
 447 #endif
 448
 449 void SignalBase::save_settings(QSettings &settings) const
 450 {
 451         settings.setValue("name", name());
 452         settings.setValue("enabled", enabled());
 453         settings.setValue("color", color());
 454         settings.setValue("conversion_type", (int)conversion_type_);
 455
 456         settings.setValue("conv_options", (int)(conversion_options_.size()));
 457         int i = 0;
 458         for (auto kvp : conversion_options_) {
 459                 settings.setValue(QString("conv_option%1_key").arg(i), kvp.first);
 460                 settings.setValue(QString("conv_option%1_value").arg(i), kvp.second);
 461                 i++;
 462         }
 463 }
 464
 465 void SignalBase::restore_settings(QSettings &settings)
 466 {
 467         if (settings.contains("name"))
 468                 set_name(settings.value("name").toString());
 469
 470         if (settings.contains("enabled"))
 471                 set_enabled(settings.value("enabled").toBool());
 472
 473         if (settings.contains("color"))
 474                 set_color(settings.value("color").value<QColor>());
 475
 476         if (settings.contains("conversion_type"))
 477                 set_conversion_type((ConversionType)settings.value("conversion_type").toInt());
 478
 479         int conv_options = 0;
 480         if (settings.contains("conv_options"))
 481                 conv_options = settings.value("conv_options").toInt();
 482
 483         if (conv_options)
 484                 for (int i = 0; i < conv_options; i++) {
 485                         const QString key_id = QString("conv_option%1_key").arg(i);
 486                         const QString value_id = QString("conv_option%1_value").arg(i);
 487
 488                         if (settings.contains(key_id) && settings.contains(value_id))
 489                                 conversion_options_[settings.value(key_id).toString()] =
 490                                         settings.value(value_id);
 491                 }
 492 }
 493
 494 bool SignalBase::conversion_is_a2l() const
 495 {
 496         return ((channel_type_ == AnalogChannel) &&
 497                 ((conversion_type_ == A2LConversionByThreshold) ||
 498                 (conversion_type_ == A2LConversionBySchmittTrigger)));
 499 }
 500
 501 void SignalBase::convert_single_segment_range(AnalogSegment *asegment,
 502         LogicSegment *lsegment, uint64_t start_sample, uint64_t end_sample)
 503 {
 504         if (end_sample > start_sample) {
 505                 tie(min_value_, max_value_) = asegment->get_min_max();
 506
 507                 // Create sigrok::Analog instance
 508                 float *asamples = new float[ConversionBlockSize];
 509                 uint8_t *lsamples = new uint8_t[ConversionBlockSize];
 510
 511                 vector<shared_ptr<sigrok::Channel> > channels;
 512                 channels.push_back(channel_);
 513
 514                 vector<const sigrok::QuantityFlag*> mq_flags;
 515                 const sigrok::Quantity * const mq = sigrok::Quantity::VOLTAGE;
 516                 const sigrok::Unit * const unit = sigrok::Unit::VOLT;
 517
 518                 shared_ptr<sigrok::Packet> packet =
 519                         Session::sr_context->create_analog_packet(channels,
 520                         asamples, ConversionBlockSize, mq, unit, mq_flags);
 521
 522                 shared_ptr<sigrok::Analog> analog =
 523                         dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 524
 525                 // Convert
 526                 uint64_t i = start_sample;
 527
 528                 if (conversion_type_ == A2LConversionByThreshold) {
 529                         const double threshold = get_conversion_thresholds()[0];
 530
 531                         // Convert as many sample blocks as we can
 532                         while ((end_sample - i) > ConversionBlockSize) {
 533                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 534
 535                                 shared_ptr<sigrok::Logic> logic =
 536                                         analog->get_logic_via_threshold(threshold, lsamples);
 537
 538                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 539                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 540                                 i += ConversionBlockSize;
 541                         }
 542
 543                         // Re-create sigrok::Analog and convert remaining samples
 544                         packet = Session::sr_context->create_analog_packet(channels,
 545                                 asamples, end_sample - i, mq, unit, mq_flags);
 546
 547                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 548
 549                         asegment->get_samples(i, end_sample, asamples);
 550                         shared_ptr<sigrok::Logic> logic =
 551                                 analog->get_logic_via_threshold(threshold, lsamples);
 552                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 553                         samples_added(lsegment->segment_id(), i, end_sample);
 554                 }
 555
 556                 if (conversion_type_ == A2LConversionBySchmittTrigger) {
 557                         const vector<double> thresholds = get_conversion_thresholds();
 558                         const double lo_thr = thresholds[0];
 559                         const double hi_thr = thresholds[1];
 560
 561                         uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 0
 562
 563                         // Convert as many sample blocks as we can
 564                         while ((end_sample - i) > ConversionBlockSize) {
 565                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 566
 567                                 shared_ptr<sigrok::Logic> logic =
 568                                         analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 569                                                 &state, lsamples);
 570
 571                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 572                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 573                                 i += ConversionBlockSize;
 574                         }
 575
 576                         // Re-create sigrok::Analog and convert remaining samples
 577                         packet = Session::sr_context->create_analog_packet(channels,
 578                                 asamples, end_sample - i, mq, unit, mq_flags);
 579
 580                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 581
 582                         asegment->get_samples(i, end_sample, asamples);
 583                         shared_ptr<sigrok::Logic> logic =
 584                                 analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 585                                         &state, lsamples);
 586                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 587                         samples_added(lsegment->segment_id(), i, end_sample);
 588                 }
 589
 590                 // If acquisition is ongoing, start-/endsample may have changed
 591                 end_sample = asegment->get_sample_count();
 592
 593                 delete[] lsamples;
 594                 delete[] asamples;
 595         }
 596 }
 597
 598 void SignalBase::convert_single_segment(AnalogSegment *asegment, LogicSegment *lsegment)
 599 {
 600         uint64_t start_sample, end_sample, old_end_sample;
 601         start_sample = end_sample = 0;
 602         bool complete_state, old_complete_state;
 603
 604         start_sample = lsegment->get_sample_count();
 605         end_sample = asegment->get_sample_count();
 606         complete_state = asegment->is_complete();
 607
 608         // Don't do anything if the segment is still being filled and the sample count is too small
 609         if ((!complete_state) && (end_sample - start_sample < ConversionBlockSize))
 610                 return;
 611
 612         do {
 613                 convert_single_segment_range(asegment, lsegment, start_sample, end_sample);
 614
 615                 old_end_sample = end_sample;
 616                 old_complete_state = complete_state;
 617
 618                 start_sample = lsegment->get_sample_count();
 619                 end_sample = asegment->get_sample_count();
 620                 complete_state = asegment->is_complete();
 621
 622                 // If the segment has been incomplete when we were called and has been
 623                 // completed in the meanwhile, we convert the remaining samples as well.
 624                 // Also, if a sufficient number of samples was added in the meanwhile,
 625                 // we do another round of sample conversion.
 626         } while ((complete_state != old_complete_state) ||
 627                 (end_sample - old_end_sample >= ConversionBlockSize));
 628 }
 629
 630 void SignalBase::conversion_thread_proc()
 631 {
 632         shared_ptr<Analog> analog_data;
 633
 634         if (conversion_is_a2l()) {
 635                 analog_data = dynamic_pointer_cast<Analog>(data_);
 636
 637                 if (analog_data->analog_segments().size() == 0) {
 638                         unique_lock<mutex> input_lock(conversion_input_mutex_);
 639                         conversion_input_cond_.wait(input_lock);
 640                 }
 641
 642         } else
 643                 // Currently, we only handle A2L conversions
 644                 return;
 645
 646         // If we had to wait for input data, we may have been notified to terminate
 647         if (conversion_interrupt_)
 648                 return;
 649
 650         uint32_t segment_id = 0;
 651
 652         AnalogSegment *asegment = analog_data->analog_segments().front().get();
 653         assert(asegment);
 654
 655         const shared_ptr<Logic> logic_data = dynamic_pointer_cast<Logic>(converted_data_);
 656         assert(logic_data);
 657
 658         // Create the initial logic data segment if needed
 659         if (logic_data->logic_segments().size() == 0) {
 660                 shared_ptr<LogicSegment> new_segment =
 661                         make_shared<LogicSegment>(*logic_data.get(), 0, 1, asegment->samplerate());
 662                 logic_data->push_segment(new_segment);
 663         }
 664
 665         LogicSegment *lsegment = logic_data->logic_segments().front().get();
 666         assert(lsegment);
 667
 668         do {
 669                 convert_single_segment(asegment, lsegment);
 670
 671                 // Only advance to next segment if the current input segment is complete
 672                 if (asegment->is_complete() &&
 673                         analog_data->analog_segments().size() > logic_data->logic_segments().size()) {
 674                         // There are more segments to process
 675                         segment_id++;
 676
 677                         try {
 678                                 asegment = analog_data->analog_segments().at(segment_id).get();
 679                         } catch (out_of_range&) {
 680                                 qDebug() << "Conversion error for" << name() << ": no analog segment" \
 681                                         << segment_id << ", segments size is" << analog_data->analog_segments().size();
 682                                 return;
 683                         }
 684
 685                         shared_ptr<LogicSegment> new_segment = make_shared<LogicSegment>(
 686                                 *logic_data.get(), segment_id, 1, asegment->samplerate());
 687                         logic_data->push_segment(new_segment);
 688
 689                         lsegment = logic_data->logic_segments().back().get();
 690                 } else {
 691                         // No more samples/segments to process, wait for data or interrupt
 692                         if (!conversion_interrupt_) {
 693                                 unique_lock<mutex> input_lock(conversion_input_mutex_);
 694                                 conversion_input_cond_.wait(input_lock);
 695                         }
 696                 }
 697         } while (!conversion_interrupt_);
 698 }
 699
 700 void SignalBase::start_conversion(bool delayed_start)
 701 {
 702         if (delayed_start) {
 703                 delayed_conversion_starter_.start();
 704                 return;
 705         }
 706
 707         stop_conversion();
 708
 709         if (converted_data_)
 710                 converted_data_->clear();
 711         samples_cleared();
 712
 713         conversion_interrupt_ = false;
 714         conversion_thread_ = std::thread(
 715                 &SignalBase::conversion_thread_proc, this);
 716 }
 717
 718 void SignalBase::stop_conversion()
 719 {
 720         // Stop conversion so we can restart it from the beginning
 721         conversion_interrupt_ = true;
 722         conversion_input_cond_.notify_one();
 723         if (conversion_thread_.joinable())
 724                 conversion_thread_.join();
 725 }
 726
 727 void SignalBase::on_samples_cleared()
 728 {
 729         if (converted_data_)
 730                 converted_data_->clear();
 731
 732         samples_cleared();
 733 }
 734
 735 void SignalBase::on_samples_added(QObject* segment, uint64_t start_sample,
 736         uint64_t end_sample)
 737 {
 738         if (conversion_type_ != NoConversion) {
 739                 if (conversion_thread_.joinable()) {
 740                         // Notify the conversion thread since it's running
 741                         conversion_input_cond_.notify_one();
 742                 } else {
 743                         // Start the conversion thread unless the delay timer is running
 744                         if (!delayed_conversion_starter_.isActive())
 745                                 start_conversion();
 746                 }
 747         }
 748
 749         data::Segment* s = qobject_cast<data::Segment*>(segment);
 750         samples_added(s->segment_id(), start_sample, end_sample);
 751 }
 752
 753 void SignalBase::on_min_max_changed(float min, float max)
 754 {
 755         // Restart conversion if one is enabled and uses a calculated threshold
 756         if ((conversion_type_ != NoConversion) &&
 757                 (get_current_conversion_preset() == DynamicPreset))
 758                 start_conversion(true);
 759
 760         min_max_changed(min, max);
 761 }
 762
 763 void SignalBase::on_capture_state_changed(int state)
 764 {
 765         if (state == Session::Running) {
 766                 // Restart conversion if one is enabled
 767                 if (conversion_type_ != NoConversion)
 768                         start_conversion();
 769         }
 770 }
 771
 772 void SignalBase::on_delayed_conversion_start()
 773 {
 774         start_conversion();
 775 }
 776
 777 } // namespace data
 778 } // namespace pv