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::ColourBGAlpha = 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::colour() const
 134 {
 135         return colour_;
 136 }
 137
 138 void SignalBase::set_colour(QColor colour)
 139 {
 140         colour_ = colour;
 141
 142         bgcolour_ = colour;
 143         bgcolour_.setAlpha(ColourBGAlpha);
 144
 145         colour_changed(colour);
 146 }
 147
 148 QColor SignalBase::bgcolour() const
 149 {
 150         return bgcolour_;
 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 SignalBase::ConversionType SignalBase::get_conversion_type() const
 269 {
 270         return conversion_type_;
 271 }
 272
 273 void SignalBase::set_conversion_type(ConversionType t)
 274 {
 275         if (conversion_type_ != NoConversion) {
 276                 stop_conversion();
 277
 278                 // Discard converted data
 279                 converted_data_.reset();
 280                 samples_cleared();
 281         }
 282
 283         conversion_type_ = t;
 284
 285         // Re-create an empty container
 286         // so that the signal is recognized as providing logic data
 287         // and thus can be assigned to a decoder
 288         if (conversion_is_a2l())
 289                 if (!converted_data_)
 290                         converted_data_ = make_shared<Logic>(1);  // Contains only one channel
 291
 292         start_conversion();
 293
 294         conversion_type_changed(t);
 295 }
 296
 297 map<QString, QVariant> SignalBase::get_conversion_options() const
 298 {
 299         return conversion_options_;
 300 }
 301
 302 bool SignalBase::set_conversion_option(QString key, QVariant value)
 303 {
 304         QVariant old_value;
 305
 306         auto key_iter = conversion_options_.find(key);
 307         if (key_iter != conversion_options_.end())
 308                 old_value = key_iter->second;
 309
 310         conversion_options_[key] = value;
 311
 312         return (value != old_value);
 313 }
 314
 315 vector<double> SignalBase::get_conversion_thresholds(const ConversionType t,
 316         const bool always_custom) const
 317 {
 318         vector<double> result;
 319         ConversionType conv_type = t;
 320         ConversionPreset preset;
 321
 322         // Use currently active conversion if no conversion type was supplied
 323         if (conv_type == NoConversion)
 324                 conv_type = conversion_type_;
 325
 326         if (always_custom)
 327                 preset = NoPreset;
 328         else
 329                 preset = get_current_conversion_preset();
 330
 331         if (conv_type == A2LConversionByThreshold) {
 332                 double thr = 0;
 333
 334                 if (preset == NoPreset) {
 335                         auto thr_iter = conversion_options_.find("threshold_value");
 336                         if (thr_iter != conversion_options_.end())
 337                                 thr = (thr_iter->second).toDouble();
 338                 }
 339
 340                 if (preset == DynamicPreset)
 341                         thr = (min_value_ + max_value_) * 0.5;  // middle between min and max
 342
 343                 if ((int)preset == 1) thr = 0.9;
 344                 if ((int)preset == 2) thr = 1.8;
 345                 if ((int)preset == 3) thr = 2.5;
 346                 if ((int)preset == 4) thr = 1.5;
 347
 348                 result.push_back(thr);
 349         }
 350
 351         if (conv_type == A2LConversionBySchmittTrigger) {
 352                 double thr_lo = 0, thr_hi = 0;
 353
 354                 if (preset == NoPreset) {
 355                         auto thr_lo_iter = conversion_options_.find("threshold_value_low");
 356                         if (thr_lo_iter != conversion_options_.end())
 357                                 thr_lo = (thr_lo_iter->second).toDouble();
 358
 359                         auto thr_hi_iter = conversion_options_.find("threshold_value_high");
 360                         if (thr_hi_iter != conversion_options_.end())
 361                                 thr_hi = (thr_hi_iter->second).toDouble();
 362                 }
 363
 364                 if (preset == DynamicPreset) {
 365                         const double amplitude = max_value_ - min_value_;
 366                         const double center = min_value_ + (amplitude / 2);
 367                         thr_lo = center - (amplitude * 0.15);  // 15% margin
 368                         thr_hi = center + (amplitude * 0.15);  // 15% margin
 369                 }
 370
 371                 if ((int)preset == 1) { thr_lo = 0.3; thr_hi = 1.2; }
 372                 if ((int)preset == 2) { thr_lo = 0.7; thr_hi = 2.5; }
 373                 if ((int)preset == 3) { thr_lo = 1.3; thr_hi = 3.7; }
 374                 if ((int)preset == 4) { thr_lo = 0.8; thr_hi = 2.0; }
 375
 376                 result.push_back(thr_lo);
 377                 result.push_back(thr_hi);
 378         }
 379
 380         return result;
 381 }
 382
 383 vector< pair<QString, int> > SignalBase::get_conversion_presets() const
 384 {
 385         vector< pair<QString, int> > presets;
 386
 387         if (conversion_type_ == A2LConversionByThreshold) {
 388                 // Source: http://www.interfacebus.com/voltage_threshold.html
 389                 presets.emplace_back(tr("Signal average"), 0);
 390                 presets.emplace_back(tr("0.9V (for 1.8V CMOS)"), 1);
 391                 presets.emplace_back(tr("1.8V (for 3.3V CMOS)"), 2);
 392                 presets.emplace_back(tr("2.5V (for 5.0V CMOS)"), 3);
 393                 presets.emplace_back(tr("1.5V (for TTL)"), 4);
 394         }
 395
 396         if (conversion_type_ == A2LConversionBySchmittTrigger) {
 397                 // Source: http://www.interfacebus.com/voltage_threshold.html
 398                 presets.emplace_back(tr("Signal average +/- 15%"), 0);
 399                 presets.emplace_back(tr("0.3V/1.2V (for 1.8V CMOS)"), 1);
 400                 presets.emplace_back(tr("0.7V/2.5V (for 3.3V CMOS)"), 2);
 401                 presets.emplace_back(tr("1.3V/3.7V (for 5.0V CMOS)"), 3);
 402                 presets.emplace_back(tr("0.8V/2.0V (for TTL)"), 4);
 403         }
 404
 405         return presets;
 406 }
 407
 408 SignalBase::ConversionPreset SignalBase::get_current_conversion_preset() const
 409 {
 410         auto preset = conversion_options_.find("preset");
 411         if (preset != conversion_options_.end())
 412                 return (ConversionPreset)((preset->second).toInt());
 413
 414         return DynamicPreset;
 415 }
 416
 417 void SignalBase::set_conversion_preset(ConversionPreset id)
 418 {
 419         conversion_options_["preset"] = (int)id;
 420 }
 421
 422 #ifdef ENABLE_DECODE
 423 bool SignalBase::is_decode_signal() const
 424 {
 425         return (channel_type_ == DecodeChannel);
 426 }
 427 #endif
 428
 429 void SignalBase::save_settings(QSettings &settings) const
 430 {
 431         settings.setValue("name", name());
 432         settings.setValue("enabled", enabled());
 433         settings.setValue("colour", colour());
 434         settings.setValue("conversion_type", (int)conversion_type_);
 435
 436         settings.setValue("conv_options", (int)(conversion_options_.size()));
 437         int i = 0;
 438         for (auto kvp : conversion_options_) {
 439                 settings.setValue(QString("conv_option%1_key").arg(i), kvp.first);
 440                 settings.setValue(QString("conv_option%1_value").arg(i), kvp.second);
 441                 i++;
 442         }
 443 }
 444
 445 void SignalBase::restore_settings(QSettings &settings)
 446 {
 447         set_name(settings.value("name").toString());
 448         set_enabled(settings.value("enabled").toBool());
 449         set_colour(settings.value("colour").value<QColor>());
 450         set_conversion_type((ConversionType)settings.value("conversion_type").toInt());
 451
 452         int conv_options = settings.value("conv_options").toInt();
 453
 454         if (conv_options)
 455                 for (int i = 0; i < conv_options; i++) {
 456                         QString key = settings.value(QString("conv_option%1_key").arg(i)).toString();
 457                         QVariant value = settings.value(QString("conv_option%1_value").arg(i));
 458                         conversion_options_[key] = value;
 459                 }
 460 }
 461
 462 bool SignalBase::conversion_is_a2l() const
 463 {
 464         return ((channel_type_ == AnalogChannel) &&
 465                 ((conversion_type_ == A2LConversionByThreshold) ||
 466                 (conversion_type_ == A2LConversionBySchmittTrigger)));
 467 }
 468
 469 void SignalBase::convert_single_segment_range(AnalogSegment *asegment,
 470         LogicSegment *lsegment, uint64_t start_sample, uint64_t end_sample)
 471 {
 472         if (end_sample > start_sample) {
 473                 tie(min_value_, max_value_) = asegment->get_min_max();
 474
 475                 // Create sigrok::Analog instance
 476                 float *asamples = new float[ConversionBlockSize];
 477                 uint8_t *lsamples = new uint8_t[ConversionBlockSize];
 478
 479                 vector<shared_ptr<sigrok::Channel> > channels;
 480                 channels.push_back(channel_);
 481
 482                 vector<const sigrok::QuantityFlag*> mq_flags;
 483                 const sigrok::Quantity * const mq = sigrok::Quantity::VOLTAGE;
 484                 const sigrok::Unit * const unit = sigrok::Unit::VOLT;
 485
 486                 shared_ptr<sigrok::Packet> packet =
 487                         Session::sr_context->create_analog_packet(channels,
 488                         asamples, ConversionBlockSize, mq, unit, mq_flags);
 489
 490                 shared_ptr<sigrok::Analog> analog =
 491                         dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 492
 493                 // Convert
 494                 uint64_t i = start_sample;
 495
 496                 if (conversion_type_ == A2LConversionByThreshold) {
 497                         const double threshold = get_conversion_thresholds()[0];
 498
 499                         // Convert as many sample blocks as we can
 500                         while ((end_sample - i) > ConversionBlockSize) {
 501                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 502
 503                                 shared_ptr<sigrok::Logic> logic =
 504                                         analog->get_logic_via_threshold(threshold, lsamples);
 505
 506                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 507                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 508                                 i += ConversionBlockSize;
 509                         }
 510
 511                         // Re-create sigrok::Analog and convert remaining samples
 512                         packet = Session::sr_context->create_analog_packet(channels,
 513                                 asamples, end_sample - i, mq, unit, mq_flags);
 514
 515                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 516
 517                         asegment->get_samples(i, end_sample, asamples);
 518                         shared_ptr<sigrok::Logic> logic =
 519                                 analog->get_logic_via_threshold(threshold, lsamples);
 520                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 521                         samples_added(lsegment->segment_id(), i, end_sample);
 522                 }
 523
 524                 if (conversion_type_ == A2LConversionBySchmittTrigger) {
 525                         const vector<double> thresholds = get_conversion_thresholds();
 526                         const double lo_thr = thresholds[0];
 527                         const double hi_thr = thresholds[1];
 528
 529                         uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 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_schmitt_trigger(lo_thr, hi_thr,
 537                                                 &state, lsamples);
 538
 539                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 540                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 541                                 i += ConversionBlockSize;
 542                         }
 543
 544                         // Re-create sigrok::Analog and convert remaining samples
 545                         packet = Session::sr_context->create_analog_packet(channels,
 546                                 asamples, end_sample - i, mq, unit, mq_flags);
 547
 548                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 549
 550                         asegment->get_samples(i, end_sample, asamples);
 551                         shared_ptr<sigrok::Logic> logic =
 552                                 analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 553                                         &state, lsamples);
 554                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 555                         samples_added(lsegment->segment_id(), i, end_sample);
 556                 }
 557
 558                 // If acquisition is ongoing, start-/endsample may have changed
 559                 end_sample = asegment->get_sample_count();
 560
 561                 delete[] lsamples;
 562                 delete[] asamples;
 563         }
 564 }
 565
 566 void SignalBase::convert_single_segment(AnalogSegment *asegment, LogicSegment *lsegment)
 567 {
 568         uint64_t start_sample, end_sample, old_end_sample;
 569         start_sample = end_sample = 0;
 570         bool complete_state, old_complete_state;
 571
 572         start_sample = lsegment->get_sample_count();
 573         end_sample = asegment->get_sample_count();
 574         complete_state = asegment->is_complete();
 575
 576         // Don't do anything if the segment is still being filled and the sample count is too small
 577         if ((!complete_state) && (end_sample - start_sample < ConversionBlockSize))
 578                 return;
 579
 580         do {
 581                 convert_single_segment_range(asegment, lsegment, start_sample, end_sample);
 582
 583                 old_end_sample = end_sample;
 584                 old_complete_state = complete_state;
 585
 586                 start_sample = lsegment->get_sample_count();
 587                 end_sample = asegment->get_sample_count();
 588                 complete_state = asegment->is_complete();
 589
 590                 // If the segment has been incomplete when we were called and has been
 591                 // completed in the meanwhile, we convert the remaining samples as well.
 592                 // Also, if a sufficient number of samples was added in the meanwhile,
 593                 // we do another round of sample conversion.
 594         } while ((complete_state != old_complete_state) ||
 595                 (end_sample - old_end_sample >= ConversionBlockSize));
 596 }
 597
 598 void SignalBase::conversion_thread_proc()
 599 {
 600         shared_ptr<Analog> analog_data;
 601
 602         if (conversion_is_a2l()) {
 603                 analog_data = dynamic_pointer_cast<Analog>(data_);
 604
 605                 if (analog_data->analog_segments().size() == 0) {
 606                         unique_lock<mutex> input_lock(conversion_input_mutex_);
 607                         conversion_input_cond_.wait(input_lock);
 608                 }
 609
 610         } else
 611                 // Currently, we only handle A2L conversions
 612                 return;
 613
 614         // If we had to wait for input data, we may have been notified to terminate
 615         if (conversion_interrupt_)
 616                 return;
 617
 618         uint32_t segment_id = 0;
 619
 620         AnalogSegment *asegment = analog_data->analog_segments().front().get();
 621         assert(asegment);
 622
 623         const shared_ptr<Logic> logic_data = dynamic_pointer_cast<Logic>(converted_data_);
 624         assert(logic_data);
 625
 626         // Create the initial logic data segment if needed
 627         if (logic_data->logic_segments().size() == 0) {
 628                 shared_ptr<LogicSegment> new_segment =
 629                         make_shared<LogicSegment>(*logic_data.get(), 0, 1, asegment->samplerate());
 630                 logic_data->push_segment(new_segment);
 631         }
 632
 633         LogicSegment *lsegment = logic_data->logic_segments().front().get();
 634         assert(lsegment);
 635
 636         do {
 637                 convert_single_segment(asegment, lsegment);
 638
 639                 // Only advance to next segment if the current input segment is complete
 640                 if (asegment->is_complete() &&
 641                         analog_data->analog_segments().size() > logic_data->logic_segments().size()) {
 642                         // There are more segments to process
 643                         segment_id++;
 644
 645                         try {
 646                                 asegment = analog_data->analog_segments().at(segment_id).get();
 647                         } catch (out_of_range&) {
 648                                 qDebug() << "Conversion error for" << name() << ": no analog segment" \
 649                                         << segment_id << ", segments size is" << analog_data->analog_segments().size();
 650                                 return;
 651                         }
 652
 653                         shared_ptr<LogicSegment> new_segment = make_shared<LogicSegment>(
 654                                 *logic_data.get(), segment_id, 1, asegment->samplerate());
 655                         logic_data->push_segment(new_segment);
 656
 657                         lsegment = logic_data->logic_segments().back().get();
 658                 } else {
 659                         // No more samples/segments to process, wait for data or interrupt
 660                         if (!conversion_interrupt_) {
 661                                 unique_lock<mutex> input_lock(conversion_input_mutex_);
 662                                 conversion_input_cond_.wait(input_lock);
 663                         }
 664                 }
 665         } while (!conversion_interrupt_);
 666 }
 667
 668 void SignalBase::start_conversion(bool delayed_start)
 669 {
 670         if (delayed_start) {
 671                 delayed_conversion_starter_.start();
 672                 return;
 673         }
 674
 675         stop_conversion();
 676
 677         if (converted_data_)
 678                 converted_data_->clear();
 679         samples_cleared();
 680
 681         conversion_interrupt_ = false;
 682         conversion_thread_ = std::thread(
 683                 &SignalBase::conversion_thread_proc, this);
 684 }
 685
 686 void SignalBase::stop_conversion()
 687 {
 688         // Stop conversion so we can restart it from the beginning
 689         conversion_interrupt_ = true;
 690         conversion_input_cond_.notify_one();
 691         if (conversion_thread_.joinable())
 692                 conversion_thread_.join();
 693 }
 694
 695 void SignalBase::on_samples_cleared()
 696 {
 697         if (converted_data_)
 698                 converted_data_->clear();
 699
 700         samples_cleared();
 701 }
 702
 703 void SignalBase::on_samples_added(QObject* segment, uint64_t start_sample,
 704         uint64_t end_sample)
 705 {
 706         if (conversion_type_ != NoConversion) {
 707                 if (conversion_thread_.joinable()) {
 708                         // Notify the conversion thread since it's running
 709                         conversion_input_cond_.notify_one();
 710                 } else {
 711                         // Start the conversion thread unless the delay timer is running
 712                         if (!delayed_conversion_starter_.isActive())
 713                                 start_conversion();
 714                 }
 715         }
 716
 717         data::Segment* s = qobject_cast<data::Segment*>(segment);
 718         samples_added(s->segment_id(), start_sample, end_sample);
 719 }
 720
 721 void SignalBase::on_min_max_changed(float min, float max)
 722 {
 723         // Restart conversion if one is enabled and uses a calculated threshold
 724         if ((conversion_type_ != NoConversion) &&
 725                 (get_current_conversion_preset() == DynamicPreset))
 726                 start_conversion(true);
 727
 728         min_max_changed(min, max);
 729 }
 730
 731 void SignalBase::on_capture_state_changed(int state)
 732 {
 733         if (state == Session::Running) {
 734                 // Restart conversion if one is enabled
 735                 if (conversion_type_ != NoConversion)
 736                         start_conversion();
 737         }
 738 }
 739
 740 void SignalBase::on_delayed_conversion_start()
 741 {
 742         start_conversion();
 743 }
 744
 745 } // namespace data
 746 } // namespace pv