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
  49 SignalGroup::SignalGroup(const QString& name)
  50 {
  51         name_ = name;
  52 }
  53
  54 void SignalGroup::append_signal(shared_ptr<SignalBase> signal)
  55 {
  56         if (!signal)
  57                 return;
  58
  59         signals_.push_back(signal);
  60         signal->set_group(this);
  61 }
  62
  63 void SignalGroup::remove_signal(shared_ptr<SignalBase> signal)
  64 {
  65         if (!signal)
  66                 return;
  67
  68         signals_.erase(std::remove_if(signals_.begin(), signals_.end(),
  69                 [&](shared_ptr<SignalBase> s) { return s == signal; }),
  70                 signals_.end());
  71 }
  72
  73 deque<shared_ptr<SignalBase>> SignalGroup::signals() const
  74 {
  75         return signals_;
  76 }
  77
  78 void SignalGroup::clear()
  79 {
  80         for (shared_ptr<SignalBase> sb : signals_)
  81                 sb->set_group(nullptr);
  82
  83         signals_.clear();
  84 }
  85
  86 const QString SignalGroup::name() const
  87 {
  88         return name_;
  89 }
  90
  91
  92 SignalBase::SignalBase(shared_ptr<sigrok::Channel> channel, ChannelType channel_type) :
  93         channel_(channel),
  94         channel_type_(channel_type),
  95         group_(nullptr),
  96         conversion_type_(NoConversion),
  97         min_value_(0),
  98         max_value_(0)
  99 {
 100         if (channel_) {
 101                 internal_name_ = QString::fromStdString(channel_->name());
 102                 index_ = channel_->index();
 103         }
 104
 105         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
 106                 this, SLOT(on_delayed_conversion_start()));
 107         delayed_conversion_starter_.setSingleShot(true);
 108         delayed_conversion_starter_.setInterval(ConversionDelay);
 109 }
 110
 111 SignalBase::~SignalBase()
 112 {
 113         stop_conversion();
 114 }
 115
 116 shared_ptr<sigrok::Channel> SignalBase::channel() const
 117 {
 118         return channel_;
 119 }
 120
 121 bool SignalBase::enabled() const
 122 {
 123         return (channel_) ? channel_->enabled() : true;
 124 }
 125
 126 void SignalBase::set_enabled(bool value)
 127 {
 128         if (channel_) {
 129                 channel_->set_enabled(value);
 130                 enabled_changed(value);
 131         }
 132 }
 133
 134 SignalBase::ChannelType SignalBase::type() const
 135 {
 136         return channel_type_;
 137 }
 138
 139 unsigned int SignalBase::index() const
 140 {
 141         return index_;
 142 }
 143
 144 void SignalBase::set_index(unsigned int index)
 145 {
 146         index_ = index;
 147 }
 148
 149 unsigned int SignalBase::logic_bit_index() const
 150 {
 151         if (channel_type_ == LogicChannel)
 152                 return index_;
 153         else
 154                 return 0;
 155 }
 156
 157 void SignalBase::set_group(SignalGroup* group)
 158 {
 159         group_ = group;
 160 }
 161
 162 SignalGroup* SignalBase::group() const
 163 {
 164         return group_;
 165 }
 166
 167 QString SignalBase::name() const
 168 {
 169         return (channel_) ? QString::fromStdString(channel_->name()) : name_;
 170 }
 171
 172 QString SignalBase::internal_name() const
 173 {
 174         return internal_name_;
 175 }
 176
 177 void SignalBase::set_internal_name(QString internal_name)
 178 {
 179         internal_name_ = internal_name;
 180 }
 181
 182 QString SignalBase::display_name() const
 183 {
 184         if ((name() != internal_name_) && (!internal_name_.isEmpty()))
 185                 return name() + " (" + internal_name_ + ")";
 186         else
 187                 return name();
 188 }
 189
 190 void SignalBase::set_name(QString name)
 191 {
 192         if (channel_)
 193                 channel_->set_name(name.toUtf8().constData());
 194
 195         name_ = name;
 196
 197         name_changed(name);
 198 }
 199
 200 QColor SignalBase::color() const
 201 {
 202         return color_;
 203 }
 204
 205 void SignalBase::set_color(QColor color)
 206 {
 207         color_ = color;
 208
 209         bgcolor_ = color;
 210         bgcolor_.setAlpha(ColorBGAlpha);
 211
 212         color_changed(color);
 213 }
 214
 215 QColor SignalBase::bgcolor() const
 216 {
 217         return bgcolor_;
 218 }
 219
 220 void SignalBase::set_data(shared_ptr<pv::data::SignalData> data)
 221 {
 222         if (data_) {
 223                 disconnect(data.get(), SIGNAL(samples_cleared()),
 224                         this, SLOT(on_samples_cleared()));
 225                 disconnect(data.get(), SIGNAL(samples_added(shared_ptr<Segment>, uint64_t, uint64_t)),
 226                         this, SLOT(on_samples_added(shared_ptr<Segment>, uint64_t, uint64_t)));
 227
 228                 if (channel_type_ == AnalogChannel) {
 229                         shared_ptr<Analog> analog = analog_data();
 230                         assert(analog);
 231
 232                         disconnect(analog.get(), SIGNAL(min_max_changed(float, float)),
 233                                 this, SLOT(on_min_max_changed(float, float)));
 234                 }
 235         }
 236
 237         data_ = data;
 238
 239         if (data_) {
 240                 connect(data.get(), SIGNAL(samples_cleared()),
 241                         this, SLOT(on_samples_cleared()));
 242                 connect(data.get(), SIGNAL(samples_added(SharedPtrToSegment, uint64_t, uint64_t)),
 243                         this, SLOT(on_samples_added(SharedPtrToSegment, uint64_t, uint64_t)));
 244
 245                 if (channel_type_ == AnalogChannel) {
 246                         shared_ptr<Analog> analog = analog_data();
 247                         assert(analog);
 248
 249                         connect(analog.get(), SIGNAL(min_max_changed(float, float)),
 250                                 this, SLOT(on_min_max_changed(float, float)));
 251                 }
 252         }
 253 }
 254
 255 void SignalBase::clear_sample_data()
 256 {
 257         if (analog_data())
 258                 analog_data()->clear();
 259
 260         if (logic_data())
 261                 logic_data()->clear();
 262 }
 263
 264 shared_ptr<data::Analog> SignalBase::analog_data() const
 265 {
 266         shared_ptr<Analog> result = nullptr;
 267
 268         if (channel_type_ == AnalogChannel)
 269                 result = dynamic_pointer_cast<Analog>(data_);
 270
 271         return result;
 272 }
 273
 274 shared_ptr<data::Logic> SignalBase::logic_data() const
 275 {
 276         shared_ptr<Logic> result = nullptr;
 277
 278         if (channel_type_ == LogicChannel)
 279                 result = dynamic_pointer_cast<Logic>(data_);
 280
 281         if (((conversion_type_ == A2LConversionByThreshold) ||
 282                 (conversion_type_ == A2LConversionBySchmittTrigger)))
 283                 result = dynamic_pointer_cast<Logic>(converted_data_);
 284
 285         return result;
 286 }
 287
 288 bool SignalBase::segment_is_complete(uint32_t segment_id) const
 289 {
 290         bool result = true;
 291
 292         if (channel_type_ == AnalogChannel)
 293         {
 294                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 295                 auto segments = data->analog_segments();
 296                 try {
 297                         result = segments.at(segment_id)->is_complete();
 298                 } catch (out_of_range&) {
 299                         // Do nothing
 300                 }
 301         }
 302
 303         if (channel_type_ == LogicChannel)
 304         {
 305                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 306                 auto segments = data->logic_segments();
 307                 try {
 308                         result = segments.at(segment_id)->is_complete();
 309                 } catch (out_of_range&) {
 310                         // Do nothing
 311                 }
 312         }
 313
 314         return result;
 315 }
 316
 317 bool SignalBase::has_samples() const
 318 {
 319         bool result = false;
 320
 321         if (channel_type_ == AnalogChannel)
 322         {
 323                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 324                 if (data) {
 325                         auto segments = data->analog_segments();
 326                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 327                                 result = true;
 328                 }
 329         }
 330
 331         if (channel_type_ == LogicChannel)
 332         {
 333                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 334                 if (data) {
 335                         auto segments = data->logic_segments();
 336                         if ((segments.size() > 0) && (segments.front()->get_sample_count() > 0))
 337                                 result = true;
 338                 }
 339         }
 340
 341         return result;
 342 }
 343
 344 double SignalBase::get_samplerate() const
 345 {
 346         if (channel_type_ == AnalogChannel)
 347         {
 348                 shared_ptr<Analog> data = dynamic_pointer_cast<Analog>(data_);
 349                 if (data)
 350                         return data->get_samplerate();
 351         }
 352
 353         if (channel_type_ == LogicChannel)
 354         {
 355                 shared_ptr<Logic> data = dynamic_pointer_cast<Logic>(data_);
 356                 if (data)
 357                         return data->get_samplerate();
 358         }
 359
 360         // Default samplerate is 1 Hz
 361         return 1.0;
 362 }
 363
 364 SignalBase::ConversionType SignalBase::get_conversion_type() const
 365 {
 366         return conversion_type_;
 367 }
 368
 369 void SignalBase::set_conversion_type(ConversionType t)
 370 {
 371         if (conversion_type_ != NoConversion) {
 372                 stop_conversion();
 373
 374                 // Discard converted data
 375                 converted_data_.reset();
 376                 samples_cleared();
 377         }
 378
 379         conversion_type_ = t;
 380
 381         // Re-create an empty container
 382         // so that the signal is recognized as providing logic data
 383         // and thus can be assigned to a decoder
 384         if (conversion_is_a2l())
 385                 if (!converted_data_)
 386                         converted_data_ = make_shared<Logic>(1);  // Contains only one channel
 387
 388         start_conversion();
 389
 390         conversion_type_changed(t);
 391 }
 392
 393 map<QString, QVariant> SignalBase::get_conversion_options() const
 394 {
 395         return conversion_options_;
 396 }
 397
 398 bool SignalBase::set_conversion_option(QString key, QVariant value)
 399 {
 400         QVariant old_value;
 401
 402         auto key_iter = conversion_options_.find(key);
 403         if (key_iter != conversion_options_.end())
 404                 old_value = key_iter->second;
 405
 406         conversion_options_[key] = value;
 407
 408         return (value != old_value);
 409 }
 410
 411 vector<double> SignalBase::get_conversion_thresholds(const ConversionType t,
 412         const bool always_custom) const
 413 {
 414         vector<double> result;
 415         ConversionType conv_type = t;
 416         ConversionPreset preset;
 417
 418         // Use currently active conversion if no conversion type was supplied
 419         if (conv_type == NoConversion)
 420                 conv_type = conversion_type_;
 421
 422         if (always_custom)
 423                 preset = NoPreset;
 424         else
 425                 preset = get_current_conversion_preset();
 426
 427         if (conv_type == A2LConversionByThreshold) {
 428                 double thr = 0;
 429
 430                 if (preset == NoPreset) {
 431                         auto thr_iter = conversion_options_.find("threshold_value");
 432                         if (thr_iter != conversion_options_.end())
 433                                 thr = (thr_iter->second).toDouble();
 434                 }
 435
 436                 if (preset == DynamicPreset)
 437                         thr = (min_value_ + max_value_) * 0.5;  // middle between min and max
 438
 439                 if ((int)preset == 1) thr = 0.9;
 440                 if ((int)preset == 2) thr = 1.8;
 441                 if ((int)preset == 3) thr = 2.5;
 442                 if ((int)preset == 4) thr = 1.5;
 443
 444                 result.push_back(thr);
 445         }
 446
 447         if (conv_type == A2LConversionBySchmittTrigger) {
 448                 double thr_lo = 0, thr_hi = 0;
 449
 450                 if (preset == NoPreset) {
 451                         auto thr_lo_iter = conversion_options_.find("threshold_value_low");
 452                         if (thr_lo_iter != conversion_options_.end())
 453                                 thr_lo = (thr_lo_iter->second).toDouble();
 454
 455                         auto thr_hi_iter = conversion_options_.find("threshold_value_high");
 456                         if (thr_hi_iter != conversion_options_.end())
 457                                 thr_hi = (thr_hi_iter->second).toDouble();
 458                 }
 459
 460                 if (preset == DynamicPreset) {
 461                         const double amplitude = max_value_ - min_value_;
 462                         const double center = min_value_ + (amplitude / 2);
 463                         thr_lo = center - (amplitude * 0.15);  // 15% margin
 464                         thr_hi = center + (amplitude * 0.15);  // 15% margin
 465                 }
 466
 467                 if ((int)preset == 1) { thr_lo = 0.3; thr_hi = 1.2; }
 468                 if ((int)preset == 2) { thr_lo = 0.7; thr_hi = 2.5; }
 469                 if ((int)preset == 3) { thr_lo = 1.3; thr_hi = 3.7; }
 470                 if ((int)preset == 4) { thr_lo = 0.8; thr_hi = 2.0; }
 471
 472                 result.push_back(thr_lo);
 473                 result.push_back(thr_hi);
 474         }
 475
 476         return result;
 477 }
 478
 479 vector< pair<QString, int> > SignalBase::get_conversion_presets() const
 480 {
 481         vector< pair<QString, int> > presets;
 482
 483         if (conversion_type_ == A2LConversionByThreshold) {
 484                 // Source: http://www.interfacebus.com/voltage_threshold.html
 485                 presets.emplace_back(tr("Signal average"), 0);
 486                 presets.emplace_back(tr("0.9V (for 1.8V CMOS)"), 1);
 487                 presets.emplace_back(tr("1.8V (for 3.3V CMOS)"), 2);
 488                 presets.emplace_back(tr("2.5V (for 5.0V CMOS)"), 3);
 489                 presets.emplace_back(tr("1.5V (for TTL)"), 4);
 490         }
 491
 492         if (conversion_type_ == A2LConversionBySchmittTrigger) {
 493                 // Source: http://www.interfacebus.com/voltage_threshold.html
 494                 presets.emplace_back(tr("Signal average +/- 15%"), 0);
 495                 presets.emplace_back(tr("0.3V/1.2V (for 1.8V CMOS)"), 1);
 496                 presets.emplace_back(tr("0.7V/2.5V (for 3.3V CMOS)"), 2);
 497                 presets.emplace_back(tr("1.3V/3.7V (for 5.0V CMOS)"), 3);
 498                 presets.emplace_back(tr("0.8V/2.0V (for TTL)"), 4);
 499         }
 500
 501         return presets;
 502 }
 503
 504 SignalBase::ConversionPreset SignalBase::get_current_conversion_preset() const
 505 {
 506         auto preset = conversion_options_.find("preset");
 507         if (preset != conversion_options_.end())
 508                 return (ConversionPreset)((preset->second).toInt());
 509
 510         return DynamicPreset;
 511 }
 512
 513 void SignalBase::set_conversion_preset(ConversionPreset id)
 514 {
 515         conversion_options_["preset"] = (int)id;
 516 }
 517
 518 #ifdef ENABLE_DECODE
 519 bool SignalBase::is_decode_signal() const
 520 {
 521         return (channel_type_ == DecodeChannel);
 522 }
 523 #endif
 524
 525 void SignalBase::save_settings(QSettings &settings) const
 526 {
 527         settings.setValue("name", name());
 528         settings.setValue("enabled", enabled());
 529         settings.setValue("color", color().rgba());
 530         settings.setValue("conversion_type", (int)conversion_type_);
 531
 532         settings.setValue("conv_options", (int)(conversion_options_.size()));
 533         int i = 0;
 534         for (auto& kvp : conversion_options_) {
 535                 settings.setValue(QString("conv_option%1_key").arg(i), kvp.first);
 536                 settings.setValue(QString("conv_option%1_value").arg(i), kvp.second);
 537                 i++;
 538         }
 539 }
 540
 541 void SignalBase::restore_settings(QSettings &settings)
 542 {
 543         if (settings.contains("name"))
 544                 set_name(settings.value("name").toString());
 545
 546         if (settings.contains("enabled"))
 547                 set_enabled(settings.value("enabled").toBool());
 548
 549         if (settings.contains("color")) {
 550                 QVariant value = settings.value("color");
 551
 552                 // Workaround for Qt QColor serialization bug on OSX
 553                 if ((QMetaType::Type)(value.type()) == QMetaType::QColor)
 554                         set_color(value.value<QColor>());
 555                 else
 556                         set_color(QColor::fromRgba(value.value<uint32_t>()));
 557
 558                 // A color with an alpha value of 0 makes the signal marker invisible
 559                 if (color() == QColor(0, 0, 0, 0))
 560                         set_color(Qt::gray);
 561         }
 562
 563         if (settings.contains("conversion_type"))
 564                 set_conversion_type((ConversionType)settings.value("conversion_type").toInt());
 565
 566         int conv_options = 0;
 567         if (settings.contains("conv_options"))
 568                 conv_options = settings.value("conv_options").toInt();
 569
 570         if (conv_options)
 571                 for (int i = 0; i < conv_options; i++) {
 572                         const QString key_id = QString("conv_option%1_key").arg(i);
 573                         const QString value_id = QString("conv_option%1_value").arg(i);
 574
 575                         if (settings.contains(key_id) && settings.contains(value_id))
 576                                 conversion_options_[settings.value(key_id).toString()] =
 577                                         settings.value(value_id);
 578                 }
 579 }
 580
 581 bool SignalBase::conversion_is_a2l() const
 582 {
 583         return ((channel_type_ == AnalogChannel) &&
 584                 ((conversion_type_ == A2LConversionByThreshold) ||
 585                 (conversion_type_ == A2LConversionBySchmittTrigger)));
 586 }
 587
 588 void SignalBase::convert_single_segment_range(AnalogSegment *asegment,
 589         LogicSegment *lsegment, uint64_t start_sample, uint64_t end_sample)
 590 {
 591         if (end_sample > start_sample) {
 592                 tie(min_value_, max_value_) = asegment->get_min_max();
 593
 594                 // Create sigrok::Analog instance
 595                 float *asamples = new float[ConversionBlockSize];
 596                 uint8_t *lsamples = new uint8_t[ConversionBlockSize];
 597
 598                 vector<shared_ptr<sigrok::Channel> > channels;
 599                 channels.push_back(channel_);
 600
 601                 vector<const sigrok::QuantityFlag*> mq_flags;
 602                 const sigrok::Quantity * const mq = sigrok::Quantity::VOLTAGE;
 603                 const sigrok::Unit * const unit = sigrok::Unit::VOLT;
 604
 605                 shared_ptr<sigrok::Packet> packet =
 606                         Session::sr_context->create_analog_packet(channels,
 607                         asamples, ConversionBlockSize, mq, unit, mq_flags);
 608
 609                 shared_ptr<sigrok::Analog> analog =
 610                         dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 611
 612                 // Convert
 613                 uint64_t i = start_sample;
 614
 615                 if (conversion_type_ == A2LConversionByThreshold) {
 616                         const double threshold = get_conversion_thresholds()[0];
 617
 618                         // Convert as many sample blocks as we can
 619                         while ((end_sample - i) > ConversionBlockSize) {
 620                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 621
 622                                 shared_ptr<sigrok::Logic> logic =
 623                                         analog->get_logic_via_threshold(threshold, lsamples);
 624
 625                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 626                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 627                                 i += ConversionBlockSize;
 628                         }
 629
 630                         // Re-create sigrok::Analog and convert remaining samples
 631                         packet = Session::sr_context->create_analog_packet(channels,
 632                                 asamples, end_sample - i, mq, unit, mq_flags);
 633
 634                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 635
 636                         asegment->get_samples(i, end_sample, asamples);
 637                         shared_ptr<sigrok::Logic> logic =
 638                                 analog->get_logic_via_threshold(threshold, lsamples);
 639                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 640                         samples_added(lsegment->segment_id(), i, end_sample);
 641                 }
 642
 643                 if (conversion_type_ == A2LConversionBySchmittTrigger) {
 644                         const vector<double> thresholds = get_conversion_thresholds();
 645                         const double lo_thr = thresholds[0];
 646                         const double hi_thr = thresholds[1];
 647
 648                         uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 0
 649
 650                         // Convert as many sample blocks as we can
 651                         while ((end_sample - i) > ConversionBlockSize) {
 652                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 653
 654                                 shared_ptr<sigrok::Logic> logic =
 655                                         analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 656                                                 &state, lsamples);
 657
 658                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 659                                 samples_added(lsegment->segment_id(), i, i + ConversionBlockSize);
 660                                 i += ConversionBlockSize;
 661                         }
 662
 663                         // Re-create sigrok::Analog and convert remaining samples
 664                         packet = Session::sr_context->create_analog_packet(channels,
 665                                 asamples, end_sample - i, mq, unit, mq_flags);
 666
 667                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 668
 669                         asegment->get_samples(i, end_sample, asamples);
 670                         shared_ptr<sigrok::Logic> logic =
 671                                 analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 672                                         &state, lsamples);
 673                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 674                         samples_added(lsegment->segment_id(), i, end_sample);
 675                 }
 676
 677                 // If acquisition is ongoing, start-/endsample may have changed
 678                 end_sample = asegment->get_sample_count();
 679
 680                 delete[] lsamples;
 681                 delete[] asamples;
 682         }
 683 }
 684
 685 void SignalBase::convert_single_segment(AnalogSegment *asegment, LogicSegment *lsegment)
 686 {
 687         uint64_t start_sample, end_sample, old_end_sample;
 688         start_sample = end_sample = 0;
 689         bool complete_state, old_complete_state;
 690
 691         start_sample = lsegment->get_sample_count();
 692         end_sample = asegment->get_sample_count();
 693         complete_state = asegment->is_complete();
 694
 695         // Don't do anything if the segment is still being filled and the sample count is too small
 696         if ((!complete_state) && (end_sample - start_sample < ConversionBlockSize))
 697                 return;
 698
 699         do {
 700                 convert_single_segment_range(asegment, lsegment, start_sample, end_sample);
 701
 702                 old_end_sample = end_sample;
 703                 old_complete_state = complete_state;
 704
 705                 start_sample = lsegment->get_sample_count();
 706                 end_sample = asegment->get_sample_count();
 707                 complete_state = asegment->is_complete();
 708
 709                 // If the segment has been incomplete when we were called and has been
 710                 // completed in the meanwhile, we convert the remaining samples as well.
 711                 // Also, if a sufficient number of samples was added in the meanwhile,
 712                 // we do another round of sample conversion.
 713         } while ((complete_state != old_complete_state) ||
 714                 (end_sample - old_end_sample >= ConversionBlockSize));
 715 }
 716
 717 void SignalBase::conversion_thread_proc()
 718 {
 719         shared_ptr<Analog> analog_data;
 720
 721         if (conversion_is_a2l()) {
 722                 analog_data = dynamic_pointer_cast<Analog>(data_);
 723
 724                 if (analog_data->analog_segments().size() == 0) {
 725                         unique_lock<mutex> input_lock(conversion_input_mutex_);
 726                         conversion_input_cond_.wait(input_lock);
 727                 }
 728
 729         } else
 730                 // Currently, we only handle A2L conversions
 731                 return;
 732
 733         // If we had to wait for input data, we may have been notified to terminate
 734         if (conversion_interrupt_)
 735                 return;
 736
 737         uint32_t segment_id = 0;
 738
 739         AnalogSegment *asegment = analog_data->analog_segments().front().get();
 740         assert(asegment);
 741
 742         const shared_ptr<Logic> logic_data = dynamic_pointer_cast<Logic>(converted_data_);
 743         assert(logic_data);
 744
 745         // Create the initial logic data segment if needed
 746         if (logic_data->logic_segments().size() == 0) {
 747                 shared_ptr<LogicSegment> new_segment =
 748                         make_shared<LogicSegment>(*logic_data.get(), 0, 1, asegment->samplerate());
 749                 logic_data->push_segment(new_segment);
 750         }
 751
 752         LogicSegment *lsegment = logic_data->logic_segments().front().get();
 753         assert(lsegment);
 754
 755         do {
 756                 convert_single_segment(asegment, lsegment);
 757
 758                 // Only advance to next segment if the current input segment is complete
 759                 if (asegment->is_complete() &&
 760                         analog_data->analog_segments().size() > logic_data->logic_segments().size()) {
 761                         // There are more segments to process
 762                         segment_id++;
 763
 764                         try {
 765                                 asegment = analog_data->analog_segments().at(segment_id).get();
 766                         } catch (out_of_range&) {
 767                                 qDebug() << "Conversion error for" << name() << ": no analog segment" \
 768                                         << segment_id << ", segments size is" << analog_data->analog_segments().size();
 769                                 return;
 770                         }
 771
 772                         shared_ptr<LogicSegment> new_segment = make_shared<LogicSegment>(
 773                                 *logic_data.get(), segment_id, 1, asegment->samplerate());
 774                         logic_data->push_segment(new_segment);
 775
 776                         lsegment = logic_data->logic_segments().back().get();
 777                 } else {
 778                         // No more samples/segments to process, wait for data or interrupt
 779                         if (!conversion_interrupt_) {
 780                                 unique_lock<mutex> input_lock(conversion_input_mutex_);
 781                                 conversion_input_cond_.wait(input_lock);
 782                         }
 783                 }
 784         } while (!conversion_interrupt_);
 785 }
 786
 787 void SignalBase::start_conversion(bool delayed_start)
 788 {
 789         if (delayed_start) {
 790                 delayed_conversion_starter_.start();
 791                 return;
 792         }
 793
 794         stop_conversion();
 795
 796         if (converted_data_)
 797                 converted_data_->clear();
 798         samples_cleared();
 799
 800         conversion_interrupt_ = false;
 801         conversion_thread_ = std::thread(
 802                 &SignalBase::conversion_thread_proc, this);
 803 }
 804
 805 void SignalBase::stop_conversion()
 806 {
 807         // Stop conversion so we can restart it from the beginning
 808         conversion_interrupt_ = true;
 809         conversion_input_cond_.notify_one();
 810         if (conversion_thread_.joinable())
 811                 conversion_thread_.join();
 812 }
 813
 814 void SignalBase::on_samples_cleared()
 815 {
 816         if (converted_data_)
 817                 converted_data_->clear();
 818
 819         samples_cleared();
 820 }
 821
 822 void SignalBase::on_samples_added(SharedPtrToSegment segment, uint64_t start_sample,
 823         uint64_t end_sample)
 824 {
 825         if (conversion_type_ != NoConversion) {
 826                 if (conversion_thread_.joinable()) {
 827                         // Notify the conversion thread since it's running
 828                         conversion_input_cond_.notify_one();
 829                 } else {
 830                         // Start the conversion thread unless the delay timer is running
 831                         if (!delayed_conversion_starter_.isActive())
 832                                 start_conversion();
 833                 }
 834         }
 835
 836         samples_added(segment->segment_id(), start_sample, end_sample);
 837 }
 838
 839 void SignalBase::on_min_max_changed(float min, float max)
 840 {
 841         // Restart conversion if one is enabled and uses a calculated threshold
 842         if ((conversion_type_ != NoConversion) &&
 843                 (get_current_conversion_preset() == DynamicPreset))
 844                 start_conversion(true);
 845
 846         min_max_changed(min, max);
 847 }
 848
 849 void SignalBase::on_capture_state_changed(int state)
 850 {
 851         if (state == Session::Running) {
 852                 // Restart conversion if one is enabled
 853                 if (conversion_type_ != NoConversion)
 854                         start_conversion();
 855         }
 856 }
 857
 858 void SignalBase::on_delayed_conversion_start()
 859 {
 860         start_conversion();
 861 }
 862
 863 } // namespace data
 864 } // namespace pv