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                 index_ = channel_->index();
  58         }
  59
  60         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
  61                 this, SLOT(on_delayed_conversion_start()));
  62         delayed_conversion_starter_.setSingleShot(true);
  63         delayed_conversion_starter_.setInterval(ConversionDelay);
  64 }
  65
  66 SignalBase::~SignalBase()
  67 {
  68         stop_conversion();
  69 }
  70
  71 shared_ptr<sigrok::Channel> SignalBase::channel() const
  72 {
  73         return channel_;
  74 }
  75
  76 QString SignalBase::name() const
  77 {
  78         return (channel_) ? QString::fromStdString(channel_->name()) : name_;
  79 }
  80
  81 QString SignalBase::internal_name() const
  82 {
  83         return internal_name_;
  84 }
  85
  86 void SignalBase::set_internal_name(QString internal_name)
  87 {
  88         internal_name_ = internal_name;
  89 }
  90
  91 QString SignalBase::display_name() const
  92 {
  93         if ((name() != internal_name_) && (!internal_name_.isEmpty()))
  94                 return name() + " (" + internal_name_ + ")";
  95         else
  96                 return name();
  97 }
  98
  99 void SignalBase::set_name(QString name)
 100 {
 101         if (channel_)
 102                 channel_->set_name(name.toUtf8().constData());
 103
 104         name_ = name;
 105
 106         name_changed(name);
 107 }
 108
 109 bool SignalBase::enabled() const
 110 {
 111         return (channel_) ? channel_->enabled() : true;
 112 }
 113
 114 void SignalBase::set_enabled(bool value)
 115 {
 116         if (channel_) {
 117                 channel_->set_enabled(value);
 118                 enabled_changed(value);
 119         }
 120 }
 121
 122 SignalBase::ChannelType SignalBase::type() const
 123 {
 124         return channel_type_;
 125 }
 126
 127 unsigned int SignalBase::index() const
 128 {
 129         return index_;
 130 }
 131
 132 void SignalBase::set_index(unsigned int index)
 133 {
 134         index_ = index;
 135 }
 136
 137 unsigned int SignalBase::logic_bit_index() const
 138 {
 139         if (channel_type_ == LogicChannel)
 140                 return index_;
 141         else
 142                 return 0;
 143 }
 144
 145 QColor SignalBase::color() const
 146 {
 147         return color_;
 148 }
 149
 150 void SignalBase::set_color(QColor color)
 151 {
 152         color_ = color;
 153
 154         bgcolor_ = color;
 155         bgcolor_.setAlpha(ColorBGAlpha);
 156
 157         color_changed(color);
 158 }
 159
 160 QColor SignalBase::bgcolor() const
 161 {
 162         return bgcolor_;
 163 }
 164
 165 void SignalBase::set_data(shared_ptr<pv::data::SignalData> data)
 166 {
 167         if (data_) {
 168                 disconnect(data.get(), SIGNAL(samples_cleared()),
 169                         this, SLOT(on_samples_cleared()));
 170                 disconnect(data.get(), SIGNAL(samples_added(shared_ptr<Segment>, uint64_t, uint64_t)),
 171                         this, SLOT(on_samples_added(shared_ptr<Segment>, uint64_t, uint64_t)));
 172
 173                 if (channel_type_ == AnalogChannel) {
 174                         shared_ptr<Analog> analog = analog_data();
 175                         assert(analog);
 176
 177                         disconnect(analog.get(), SIGNAL(min_max_changed(float, float)),
 178                                 this, SLOT(on_min_max_changed(float, float)));
 179                 }
 180         }
 181
 182         data_ = data;
 183
 184         if (data_) {
 185                 connect(data.get(), SIGNAL(samples_cleared()),
 186                         this, SLOT(on_samples_cleared()));
 187                 connect(data.get(), SIGNAL(samples_added(SharedPtrToSegment, uint64_t, uint64_t)),
 188                         this, SLOT(on_samples_added(SharedPtrToSegment, uint64_t, uint64_t)));
 189
 190                 if (channel_type_ == AnalogChannel) {
 191                         shared_ptr<Analog> analog = analog_data();
 192                         assert(analog);
 193
 194                         connect(analog.get(), SIGNAL(min_max_changed(float, float)),
 195                                 this, SLOT(on_min_max_changed(float, float)));
 196                 }
 197         }
 198 }
 199
 200 void SignalBase::clear_sample_data()
 201 {
 202         if (analog_data())
 203                 analog_data()->clear();
 204
 205         if (logic_data())
 206                 logic_data()->clear();
 207 }
 208
 209 shared_ptr<data::Analog> SignalBase::analog_data() const
 210 {
 211         shared_ptr<Analog> result = nullptr;
 212
 213         if (channel_type_ == AnalogChannel)
 214                 result = dynamic_pointer_cast<Analog>(data_);
 215
 216         return result;
 217 }
 218
 219 shared_ptr<data::Logic> SignalBase::logic_data() const
 220 {
 221         shared_ptr<Logic> result = nullptr;
 222
 223         if (channel_type_ == LogicChannel)
 224                 result = dynamic_pointer_cast<Logic>(data_);
 225
 226         if (((conversion_type_ == A2LConversionByThreshold) ||
 227                 (conversion_type_ == A2LConversionBySchmittTrigger)))
 228                 result = dynamic_pointer_cast<Logic>(converted_data_);
 229
 230         return result;
 231 }
 232
 233 bool SignalBase::segment_is_complete(uint32_t segment_id) const
 234 {
 235         bool result = true;
 236
 237         if (channel_type_ == AnalogChannel)
 238         {
 239                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 240                 auto segments = data->analog_segments();
 241                 try {
 242                         result = segments.at(segment_id)->is_complete();
 243                 } catch (out_of_range&) {
 244                         // Do nothing
 245                 }
 246         }
 247
 248         if (channel_type_ == LogicChannel)
 249         {
 250                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 251                 auto segments = data->logic_segments();
 252                 try {
 253                         result = segments.at(segment_id)->is_complete();
 254                 } catch (out_of_range&) {
 255                         // Do nothing
 256                 }
 257         }
 258
 259         return result;
 260 }
 261
 262 bool SignalBase::has_samples() const
 263 {
 264         bool result = false;
 265
 266         if (channel_type_ == AnalogChannel)
 267         {
 268                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 269                 if (data) {
 270                         auto segments = data->analog_segments();
 271                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 272                                 result = true;
 273                 }
 274         }
 275
 276         if (channel_type_ == LogicChannel)
 277         {
 278                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 279                 if (data) {
 280                         auto segments = data->logic_segments();
 281                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 282                                 result = true;
 283                 }
 284         }
 285
 286         return result;
 287 }
 288
 289 double SignalBase::get_samplerate() const
 290 {
 291         if (channel_type_ == AnalogChannel)
 292         {
 293                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 294                 if (data)
 295                         return data->get_samplerate();
 296         }
 297
 298         if (channel_type_ == LogicChannel)
 299         {
 300                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 301                 if (data)
 302                         return data->get_samplerate();
 303         }
 304
 305         // Default samplerate is 1 Hz
 306         return 1.0;
 307 }
 308
 309 SignalBase::ConversionType SignalBase::get_conversion_type() const
 310 {
 311         return conversion_type_;
 312 }
 313
 314 void SignalBase::set_conversion_type(ConversionType t)
 315 {
 316         if (conversion_type_ != NoConversion) {
 317                 stop_conversion();
 318
 319                 // Discard converted data
 320                 converted_data_.reset();
 321                 samples_cleared();
 322         }
 323
 324         conversion_type_ = t;
 325
 326         // Re-create an empty container
 327         // so that the signal is recognized as providing logic data
 328         // and thus can be assigned to a decoder
 329         if (conversion_is_a2l())
 330                 if (!converted_data_)
 331                         converted_data_ = make_shared<Logic>(1);  // Contains only one channel
 332
 333         start_conversion();
 334
 335         conversion_type_changed(t);
 336 }
 337
 338 map<QString, QVariant> SignalBase::get_conversion_options() const
 339 {
 340         return conversion_options_;
 341 }
 342
 343 bool SignalBase::set_conversion_option(QString key, QVariant value)
 344 {
 345         QVariant old_value;
 346
 347         auto key_iter = conversion_options_.find(key);
 348         if (key_iter != conversion_options_.end())
 349                 old_value = key_iter->second;
 350
 351         conversion_options_[key] = value;
 352
 353         return (value != old_value);
 354 }
 355
 356 vector<double> SignalBase::get_conversion_thresholds(const ConversionType t,
 357         const bool always_custom) const
 358 {
 359         vector<double> result;
 360         ConversionType conv_type = t;
 361         ConversionPreset preset;
 362
 363         // Use currently active conversion if no conversion type was supplied
 364         if (conv_type == NoConversion)
 365                 conv_type = conversion_type_;
 366
 367         if (always_custom)
 368                 preset = NoPreset;
 369         else
 370                 preset = get_current_conversion_preset();
 371
 372         if (conv_type == A2LConversionByThreshold) {
 373                 double thr = 0;
 374
 375                 if (preset == NoPreset) {
 376                         auto thr_iter = conversion_options_.find("threshold_value");
 377                         if (thr_iter != conversion_options_.end())
 378                                 thr = (thr_iter->second).toDouble();
 379                 }
 380
 381                 if (preset == DynamicPreset)
 382                         thr = (min_value_ + max_value_) * 0.5;  // middle between min and max
 383
 384                 if ((int)preset == 1) thr = 0.9;
 385                 if ((int)preset == 2) thr = 1.8;
 386                 if ((int)preset == 3) thr = 2.5;
 387                 if ((int)preset == 4) thr = 1.5;
 388
 389                 result.push_back(thr);
 390         }
 391
 392         if (conv_type == A2LConversionBySchmittTrigger) {
 393                 double thr_lo = 0, thr_hi = 0;
 394
 395                 if (preset == NoPreset) {
 396                         auto thr_lo_iter = conversion_options_.find("threshold_value_low");
 397                         if (thr_lo_iter != conversion_options_.end())
 398                                 thr_lo = (thr_lo_iter->second).toDouble();
 399
 400                         auto thr_hi_iter = conversion_options_.find("threshold_value_high");
 401                         if (thr_hi_iter != conversion_options_.end())
 402                                 thr_hi = (thr_hi_iter->second).toDouble();
 403                 }
 404
 405                 if (preset == DynamicPreset) {
 406                         const double amplitude = max_value_ - min_value_;
 407                         const double center = min_value_ + (amplitude / 2);
 408                         thr_lo = center - (amplitude * 0.15);  // 15% margin
 409                         thr_hi = center + (amplitude * 0.15);  // 15% margin
 410                 }
 411
 412                 if ((int)preset == 1) { thr_lo = 0.3; thr_hi = 1.2; }
 413                 if ((int)preset == 2) { thr_lo = 0.7; thr_hi = 2.5; }
 414                 if ((int)preset == 3) { thr_lo = 1.3; thr_hi = 3.7; }
 415                 if ((int)preset == 4) { thr_lo = 0.8; thr_hi = 2.0; }
 416
 417                 result.push_back(thr_lo);
 418                 result.push_back(thr_hi);
 419         }
 420
 421         return result;
 422 }
 423
 424 vector< pair<QString, int> > SignalBase::get_conversion_presets() const
 425 {
 426         vector< pair<QString, int> > presets;
 427
 428         if (conversion_type_ == A2LConversionByThreshold) {
 429                 // Source: http://www.interfacebus.com/voltage_threshold.html
 430                 presets.emplace_back(tr("Signal average"), 0);
 431                 presets.emplace_back(tr("0.9V (for 1.8V CMOS)"), 1);
 432                 presets.emplace_back(tr("1.8V (for 3.3V CMOS)"), 2);
 433                 presets.emplace_back(tr("2.5V (for 5.0V CMOS)"), 3);
 434                 presets.emplace_back(tr("1.5V (for TTL)"), 4);
 435         }
 436
 437         if (conversion_type_ == A2LConversionBySchmittTrigger) {
 438                 // Source: http://www.interfacebus.com/voltage_threshold.html
 439                 presets.emplace_back(tr("Signal average +/- 15%"), 0);
 440                 presets.emplace_back(tr("0.3V/1.2V (for 1.8V CMOS)"), 1);
 441                 presets.emplace_back(tr("0.7V/2.5V (for 3.3V CMOS)"), 2);
 442                 presets.emplace_back(tr("1.3V/3.7V (for 5.0V CMOS)"), 3);
 443                 presets.emplace_back(tr("0.8V/2.0V (for TTL)"), 4);
 444         }
 445
 446         return presets;
 447 }
 448
 449 SignalBase::ConversionPreset SignalBase::get_current_conversion_preset() const
 450 {
 451         auto preset = conversion_options_.find("preset");
 452         if (preset != conversion_options_.end())
 453                 return (ConversionPreset)((preset->second).toInt());
 454
 455         return DynamicPreset;
 456 }
 457
 458 void SignalBase::set_conversion_preset(ConversionPreset id)
 459 {
 460         conversion_options_["preset"] = (int)id;
 461 }
 462
 463 #ifdef ENABLE_DECODE
 464 bool SignalBase::is_decode_signal() const
 465 {
 466         return (channel_type_ == DecodeChannel);
 467 }
 468 #endif
 469
 470 void SignalBase::save_settings(QSettings &settings) const
 471 {
 472         settings.setValue("name", name());
 473         settings.setValue("enabled", enabled());
 474         settings.setValue("color", color().rgba());
 475         settings.setValue("conversion_type", (int)conversion_type_);
 476
 477         settings.setValue("conv_options", (int)(conversion_options_.size()));
 478         int i = 0;
 479         for (auto& kvp : conversion_options_) {
 480                 settings.setValue(QString("conv_option%1_key").arg(i), kvp.first);
 481                 settings.setValue(QString("conv_option%1_value").arg(i), kvp.second);
 482                 i++;
 483         }
 484 }
 485
 486 void SignalBase::restore_settings(QSettings &settings)
 487 {
 488         if (settings.contains("name"))
 489                 set_name(settings.value("name").toString());
 490
 491         if (settings.contains("enabled"))
 492                 set_enabled(settings.value("enabled").toBool());
 493
 494         if (settings.contains("color")) {
 495                 QVariant value = settings.value("color");
 496
 497                 // Workaround for Qt QColor serialization bug on OSX
 498                 if ((QMetaType::Type)(value.type()) == QMetaType::QColor)
 499                         set_color(value.value<QColor>());
 500                 else
 501                         set_color(QColor::fromRgba(value.value<uint32_t>()));
 502
 503                 // A color with an alpha value of 0 makes the signal marker invisible
 504                 if (color() == QColor(0, 0, 0, 0))
 505                         set_color(Qt::gray);
 506         }
 507
 508         if (settings.contains("conversion_type"))
 509                 set_conversion_type((ConversionType)settings.value("conversion_type").toInt());
 510
 511         int conv_options = 0;
 512         if (settings.contains("conv_options"))
 513                 conv_options = settings.value("conv_options").toInt();
 514
 515         if (conv_options)
 516                 for (int i = 0; i < conv_options; i++) {
 517                         const QString key_id = QString("conv_option%1_key").arg(i);
 518                         const QString value_id = QString("conv_option%1_value").arg(i);
 519
 520                         if (settings.contains(key_id) && settings.contains(value_id))
 521                                 conversion_options_[settings.value(key_id).toString()] =
 522                                         settings.value(value_id);
 523                 }
 524 }
 525
 526 bool SignalBase::conversion_is_a2l() const
 527 {
 528         return ((channel_type_ == AnalogChannel) &&
 529                 ((conversion_type_ == A2LConversionByThreshold) ||
 530                 (conversion_type_ == A2LConversionBySchmittTrigger)));
 531 }
 532
 533 void SignalBase::convert_single_segment_range(AnalogSegment *asegment,
 534         LogicSegment *lsegment, uint64_t start_sample, uint64_t end_sample)
 535 {
 536         if (end_sample > start_sample) {
 537                 tie(min_value_, max_value_) = asegment->get_min_max();
 538
 539                 // Create sigrok::Analog instance
 540                 float *asamples = new float[ConversionBlockSize];
 541                 uint8_t *lsamples = new uint8_t[ConversionBlockSize];
 542
 543                 vector<shared_ptr<sigrok::Channel> > channels;
 544                 channels.push_back(channel_);
 545
 546                 vector<const sigrok::QuantityFlag*> mq_flags;
 547                 const sigrok::Quantity * const mq = sigrok::Quantity::VOLTAGE;
 548                 const sigrok::Unit * const unit = sigrok::Unit::VOLT;
 549
 550                 shared_ptr<sigrok::Packet> packet =
 551                         Session::sr_context->create_analog_packet(channels,
 552                         asamples, ConversionBlockSize, mq, unit, mq_flags);
 553
 554                 shared_ptr<sigrok::Analog> analog =
 555                         dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 556
 557                 // Convert
 558                 uint64_t i = start_sample;
 559
 560                 if (conversion_type_ == A2LConversionByThreshold) {
 561                         const double threshold = get_conversion_thresholds()[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_threshold(threshold, lsamples);
 569
 570                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 571                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 572                                 i += ConversionBlockSize;
 573                         }
 574
 575                         // Re-create sigrok::Analog and convert remaining samples
 576                         packet = Session::sr_context->create_analog_packet(channels,
 577                                 asamples, end_sample - i, mq, unit, mq_flags);
 578
 579                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 580
 581                         asegment->get_samples(i, end_sample, asamples);
 582                         shared_ptr<sigrok::Logic> logic =
 583                                 analog->get_logic_via_threshold(threshold, lsamples);
 584                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 585                         samples_added(lsegment->segment_id(), i, end_sample);
 586                 }
 587
 588                 if (conversion_type_ == A2LConversionBySchmittTrigger) {
 589                         const vector<double> thresholds = get_conversion_thresholds();
 590                         const double lo_thr = thresholds[0];
 591                         const double hi_thr = thresholds[1];
 592
 593                         uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 0
 594
 595                         // Convert as many sample blocks as we can
 596                         while ((end_sample - i) > ConversionBlockSize) {
 597                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 598
 599                                 shared_ptr<sigrok::Logic> logic =
 600                                         analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 601                                                 &state, lsamples);
 602
 603                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 604                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 605                                 i += ConversionBlockSize;
 606                         }
 607
 608                         // Re-create sigrok::Analog and convert remaining samples
 609                         packet = Session::sr_context->create_analog_packet(channels,
 610                                 asamples, end_sample - i, mq, unit, mq_flags);
 611
 612                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 613
 614                         asegment->get_samples(i, end_sample, asamples);
 615                         shared_ptr<sigrok::Logic> logic =
 616                                 analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 617                                         &state, lsamples);
 618                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 619                         samples_added(lsegment->segment_id(), i, end_sample);
 620                 }
 621
 622                 // If acquisition is ongoing, start-/endsample may have changed
 623                 end_sample = asegment->get_sample_count();
 624
 625                 delete[] lsamples;
 626                 delete[] asamples;
 627         }
 628 }
 629
 630 void SignalBase::convert_single_segment(AnalogSegment *asegment, LogicSegment *lsegment)
 631 {
 632         uint64_t start_sample, end_sample, old_end_sample;
 633         start_sample = end_sample = 0;
 634         bool complete_state, old_complete_state;
 635
 636         start_sample = lsegment->get_sample_count();
 637         end_sample = asegment->get_sample_count();
 638         complete_state = asegment->is_complete();
 639
 640         // Don't do anything if the segment is still being filled and the sample count is too small
 641         if ((!complete_state) && (end_sample - start_sample < ConversionBlockSize))
 642                 return;
 643
 644         do {
 645                 convert_single_segment_range(asegment, lsegment, start_sample, end_sample);
 646
 647                 old_end_sample = end_sample;
 648                 old_complete_state = complete_state;
 649
 650                 start_sample = lsegment->get_sample_count();
 651                 end_sample = asegment->get_sample_count();
 652                 complete_state = asegment->is_complete();
 653
 654                 // If the segment has been incomplete when we were called and has been
 655                 // completed in the meanwhile, we convert the remaining samples as well.
 656                 // Also, if a sufficient number of samples was added in the meanwhile,
 657                 // we do another round of sample conversion.
 658         } while ((complete_state != old_complete_state) ||
 659                 (end_sample - old_end_sample >= ConversionBlockSize));
 660 }
 661
 662 void SignalBase::conversion_thread_proc()
 663 {
 664         shared_ptr<Analog> analog_data;
 665
 666         if (conversion_is_a2l()) {
 667                 analog_data = dynamic_pointer_cast<Analog>(data_);
 668
 669                 if (analog_data->analog_segments().size() == 0) {
 670                         unique_lock<mutex> input_lock(conversion_input_mutex_);
 671                         conversion_input_cond_.wait(input_lock);
 672                 }
 673
 674         } else
 675                 // Currently, we only handle A2L conversions
 676                 return;
 677
 678         // If we had to wait for input data, we may have been notified to terminate
 679         if (conversion_interrupt_)
 680                 return;
 681
 682         uint32_t segment_id = 0;
 683
 684         AnalogSegment *asegment = analog_data->analog_segments().front().get();
 685         assert(asegment);
 686
 687         const shared_ptr<Logic> logic_data = dynamic_pointer_cast<Logic>(converted_data_);
 688         assert(logic_data);
 689
 690         // Create the initial logic data segment if needed
 691         if (logic_data->logic_segments().size() == 0) {
 692                 shared_ptr<LogicSegment> new_segment =
 693                         make_shared<LogicSegment>(*logic_data.get(), 0, 1, asegment->samplerate());
 694                 logic_data->push_segment(new_segment);
 695         }
 696
 697         LogicSegment *lsegment = logic_data->logic_segments().front().get();
 698         assert(lsegment);
 699
 700         do {
 701                 convert_single_segment(asegment, lsegment);
 702
 703                 // Only advance to next segment if the current input segment is complete
 704                 if (asegment->is_complete() &&
 705                         analog_data->analog_segments().size() > logic_data->logic_segments().size()) {
 706                         // There are more segments to process
 707                         segment_id++;
 708
 709                         try {
 710                                 asegment = analog_data->analog_segments().at(segment_id).get();
 711                         } catch (out_of_range&) {
 712                                 qDebug() << "Conversion error for" << name() << ": no analog segment" \
 713                                         << segment_id << ", segments size is" << analog_data->analog_segments().size();
 714                                 return;
 715                         }
 716
 717                         shared_ptr<LogicSegment> new_segment = make_shared<LogicSegment>(
 718                                 *logic_data.get(), segment_id, 1, asegment->samplerate());
 719                         logic_data->push_segment(new_segment);
 720
 721                         lsegment = logic_data->logic_segments().back().get();
 722                 } else {
 723                         // No more samples/segments to process, wait for data or interrupt
 724                         if (!conversion_interrupt_) {
 725                                 unique_lock<mutex> input_lock(conversion_input_mutex_);
 726                                 conversion_input_cond_.wait(input_lock);
 727                         }
 728                 }
 729         } while (!conversion_interrupt_);
 730 }
 731
 732 void SignalBase::start_conversion(bool delayed_start)
 733 {
 734         if (delayed_start) {
 735                 delayed_conversion_starter_.start();
 736                 return;
 737         }
 738
 739         stop_conversion();
 740
 741         if (converted_data_)
 742                 converted_data_->clear();
 743         samples_cleared();
 744
 745         conversion_interrupt_ = false;
 746         conversion_thread_ = std::thread(
 747                 &SignalBase::conversion_thread_proc, this);
 748 }
 749
 750 void SignalBase::stop_conversion()
 751 {
 752         // Stop conversion so we can restart it from the beginning
 753         conversion_interrupt_ = true;
 754         conversion_input_cond_.notify_one();
 755         if (conversion_thread_.joinable())
 756                 conversion_thread_.join();
 757 }
 758
 759 void SignalBase::on_samples_cleared()
 760 {
 761         if (converted_data_)
 762                 converted_data_->clear();
 763
 764         samples_cleared();
 765 }
 766
 767 void SignalBase::on_samples_added(SharedPtrToSegment segment, uint64_t start_sample,
 768         uint64_t end_sample)
 769 {
 770         if (conversion_type_ != NoConversion) {
 771                 if (conversion_thread_.joinable()) {
 772                         // Notify the conversion thread since it's running
 773                         conversion_input_cond_.notify_one();
 774                 } else {
 775                         // Start the conversion thread unless the delay timer is running
 776                         if (!delayed_conversion_starter_.isActive())
 777                                 start_conversion();
 778                 }
 779         }
 780
 781         samples_added(segment->segment_id(), start_sample, end_sample);
 782 }
 783
 784 void SignalBase::on_min_max_changed(float min, float max)
 785 {
 786         // Restart conversion if one is enabled and uses a calculated threshold
 787         if ((conversion_type_ != NoConversion) &&
 788                 (get_current_conversion_preset() == DynamicPreset))
 789                 start_conversion(true);
 790
 791         min_max_changed(min, max);
 792 }
 793
 794 void SignalBase::on_capture_state_changed(int state)
 795 {
 796         if (state == Session::Running) {
 797                 // Restart conversion if one is enabled
 798                 if (conversion_type_ != NoConversion)
 799                         start_conversion();
 800         }
 801 }
 802
 803 void SignalBase::on_delayed_conversion_start()
 804 {
 805         start_conversion();
 806 }
 807
 808 } // namespace data
 809 } // namespace pv