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