pv/data/decodesignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <cstring>
  21 #include <forward_list>
  22 #include <limits>
  23
  24 #include <QDebug>
  25
  26 #include "logic.hpp"
  27 #include "logicsegment.hpp"
  28 #include "decodesignal.hpp"
  29 #include "signaldata.hpp"
  30
  31 #include <pv/data/decode/decoder.hpp>
  32 #include <pv/data/decode/row.hpp>
  33 #include <pv/globalsettings.hpp>
  34 #include <pv/session.hpp>
  35
  36 using std::forward_list;
  37 using std::lock_guard;
  38 using std::make_pair;
  39 using std::make_shared;
  40 using std::min;
  41 using std::out_of_range;
  42 using std::shared_ptr;
  43 using std::unique_lock;
  44 using pv::data::decode::Annotation;
  45 using pv::data::decode::AnnotationClass;
  46 using pv::data::decode::DecodeChannel;
  47 using pv::data::decode::Decoder;
  48 using pv::data::decode::Row;
  49
  50 namespace pv {
  51 namespace data {
  52
  53 const double DecodeSignal::DecodeMargin = 1.0;
  54 const double DecodeSignal::DecodeThreshold = 0.2;
  55 const int64_t DecodeSignal::DecodeChunkLength = 256 * 1024;
  56
  57
  58 DecodeSignal::DecodeSignal(pv::Session &session) :
  59         SignalBase(nullptr, SignalBase::DecodeChannel),
  60         session_(session),
  61         srd_session_(nullptr),
  62         logic_mux_data_invalid_(false),
  63         stack_config_changed_(true),
  64         current_segment_id_(0)
  65 {
  66         connect(&session_, SIGNAL(capture_state_changed(int)),
  67                 this, SLOT(on_capture_state_changed(int)));
  68 }
  69
  70 DecodeSignal::~DecodeSignal()
  71 {
  72         reset_decode(true);
  73 }
  74
  75 const vector< shared_ptr<Decoder> >& DecodeSignal::decoder_stack() const
  76 {
  77         return stack_;
  78 }
  79
  80 void DecodeSignal::stack_decoder(const srd_decoder *decoder, bool restart_decode)
  81 {
  82         assert(decoder);
  83
  84         // Set name if this decoder is the first in the list or the name is unchanged
  85         const srd_decoder* prev_dec = stack_.empty() ? nullptr : stack_.back()->get_srd_decoder();
  86         const QString prev_dec_name = prev_dec ? QString::fromUtf8(prev_dec->name) : QString();
  87
  88         if ((stack_.empty()) || ((stack_.size() > 0) && (name() == prev_dec_name)))
  89                 set_name(QString::fromUtf8(decoder->name));
  90
  91         const shared_ptr<Decoder> dec = make_shared<Decoder>(decoder);
  92         stack_.push_back(dec);
  93
  94         // Include the newly created decode channels in the channel lists
  95         update_channel_list();
  96
  97         stack_config_changed_ = true;
  98         auto_assign_signals(dec);
  99         commit_decoder_channels();
 100
 101         decoder_stacked((void*)dec.get());
 102
 103         if (restart_decode)
 104                 begin_decode();
 105 }
 106
 107 void DecodeSignal::remove_decoder(int index)
 108 {
 109         assert(index >= 0);
 110         assert(index < (int)stack_.size());
 111
 112         // Find the decoder in the stack
 113         auto iter = stack_.begin();
 114         for (int i = 0; i < index; i++, iter++)
 115                 assert(iter != stack_.end());
 116
 117         decoder_removed(iter->get());
 118
 119         // Delete the element
 120         stack_.erase(iter);
 121
 122         // Update channels and decoded data
 123         stack_config_changed_ = true;
 124         update_channel_list();
 125         begin_decode();
 126 }
 127
 128 bool DecodeSignal::toggle_decoder_visibility(int index)
 129 {
 130         auto iter = stack_.cbegin();
 131         for (int i = 0; i < index; i++, iter++)
 132                 assert(iter != stack_.end());
 133
 134         shared_ptr<Decoder> dec = *iter;
 135
 136         // Toggle decoder visibility
 137         bool state = false;
 138         if (dec) {
 139                 state = !dec->shown();
 140                 dec->show(state);
 141         }
 142
 143         return state;
 144 }
 145
 146 void DecodeSignal::reset_decode(bool shutting_down)
 147 {
 148         if (stack_config_changed_ || shutting_down)
 149                 stop_srd_session();
 150         else
 151                 terminate_srd_session();
 152
 153         if (decode_thread_.joinable()) {
 154                 decode_interrupt_ = true;
 155                 decode_input_cond_.notify_one();
 156                 decode_thread_.join();
 157         }
 158
 159         if (logic_mux_thread_.joinable()) {
 160                 logic_mux_interrupt_ = true;
 161                 logic_mux_cond_.notify_one();
 162                 logic_mux_thread_.join();
 163         }
 164
 165         resume_decode();  // Make sure the decode thread isn't blocked by pausing
 166
 167         current_segment_id_ = 0;
 168         segments_.clear();
 169
 170         logic_mux_data_.reset();
 171         logic_mux_data_invalid_ = true;
 172
 173         if (!error_message_.isEmpty()) {
 174                 error_message_ = QString();
 175                 // TODO Emulate noquote()
 176                 qDebug().nospace() << name() << ": Error cleared";
 177         }
 178
 179         decode_reset();
 180 }
 181
 182 void DecodeSignal::begin_decode()
 183 {
 184         if (decode_thread_.joinable()) {
 185                 decode_interrupt_ = true;
 186                 decode_input_cond_.notify_one();
 187                 decode_thread_.join();
 188         }
 189
 190         if (logic_mux_thread_.joinable()) {
 191                 logic_mux_interrupt_ = true;
 192                 logic_mux_cond_.notify_one();
 193                 logic_mux_thread_.join();
 194         }
 195
 196         reset_decode();
 197
 198         if (stack_.size() == 0) {
 199                 set_error_message(tr("No decoders"));
 200                 return;
 201         }
 202
 203         assert(channels_.size() > 0);
 204
 205         if (get_assigned_signal_count() == 0) {
 206                 set_error_message(tr("There are no channels assigned to this decoder"));
 207                 return;
 208         }
 209
 210         // Make sure that all assigned channels still provide logic data
 211         // (can happen when a converted signal was assigned but the
 212         // conversion removed in the meanwhile)
 213         for (decode::DecodeChannel& ch : channels_)
 214                 if (ch.assigned_signal && !(ch.assigned_signal->logic_data() != nullptr))
 215                         ch.assigned_signal = nullptr;
 216
 217         // Check that all decoders have the required channels
 218         for (const shared_ptr<Decoder>& dec : stack_)
 219                 if (!dec->have_required_channels()) {
 220                         set_error_message(tr("One or more required channels "
 221                                 "have not been specified"));
 222                         return;
 223                 }
 224
 225         // Free the logic data and its segment(s) if it needs to be updated
 226         if (logic_mux_data_invalid_)
 227                 logic_mux_data_.reset();
 228
 229         if (!logic_mux_data_) {
 230                 const uint32_t ch_count = get_assigned_signal_count();
 231                 logic_mux_unit_size_ = (ch_count + 7) / 8;
 232                 logic_mux_data_ = make_shared<Logic>(ch_count);
 233         }
 234
 235         // Receive notifications when new sample data is available
 236         connect_input_notifiers();
 237
 238         if (get_input_segment_count() == 0) {
 239                 set_error_message(tr("No input data"));
 240                 return;
 241         }
 242
 243         // Make sure the logic output data is complete and up-to-date
 244         logic_mux_interrupt_ = false;
 245         logic_mux_thread_ = std::thread(&DecodeSignal::logic_mux_proc, this);
 246
 247         // Decode the muxed logic data
 248         decode_interrupt_ = false;
 249         decode_thread_ = std::thread(&DecodeSignal::decode_proc, this);
 250 }
 251
 252 void DecodeSignal::pause_decode()
 253 {
 254         decode_paused_ = true;
 255 }
 256
 257 void DecodeSignal::resume_decode()
 258 {
 259         // Manual unlocking is done before notifying, to avoid waking up the
 260         // waiting thread only to block again (see notify_one for details)
 261         decode_pause_mutex_.unlock();
 262         decode_pause_cond_.notify_one();
 263         decode_paused_ = false;
 264 }
 265
 266 bool DecodeSignal::is_paused() const
 267 {
 268         return decode_paused_;
 269 }
 270
 271 QString DecodeSignal::error_message() const
 272 {
 273         lock_guard<mutex> lock(output_mutex_);
 274         return error_message_;
 275 }
 276
 277 const vector<decode::DecodeChannel> DecodeSignal::get_channels() const
 278 {
 279         return channels_;
 280 }
 281
 282 void DecodeSignal::auto_assign_signals(const shared_ptr<Decoder> dec)
 283 {
 284         bool new_assignment = false;
 285
 286         // Try to auto-select channels that don't have signals assigned yet
 287         for (decode::DecodeChannel& ch : channels_) {
 288                 // If a decoder is given, auto-assign only its channels
 289                 if (dec && (ch.decoder_ != dec))
 290                         continue;
 291
 292                 if (ch.assigned_signal)
 293                         continue;
 294
 295                 QString ch_name = ch.name.toLower();
 296                 ch_name = ch_name.replace(QRegExp("[-_.]"), " ");
 297
 298                 shared_ptr<data::SignalBase> match;
 299                 for (const shared_ptr<data::SignalBase>& s : session_.signalbases()) {
 300                         if (!s->enabled())
 301                                 continue;
 302
 303                         QString s_name = s->name().toLower();
 304                         s_name = s_name.replace(QRegExp("[-_.]"), " ");
 305
 306                         if (s->logic_data() &&
 307                                 ((ch_name.contains(s_name)) || (s_name.contains(ch_name)))) {
 308                                 if (!match)
 309                                         match = s;
 310                                 else {
 311                                         // Only replace an existing match if it matches more characters
 312                                         int old_unmatched = ch_name.length() - match->name().length();
 313                                         int new_unmatched = ch_name.length() - s->name().length();
 314                                         if (abs(new_unmatched) < abs(old_unmatched))
 315                                                 match = s;
 316                                 }
 317                         }
 318                 }
 319
 320                 if (match) {
 321                         ch.assigned_signal = match.get();
 322                         new_assignment = true;
 323                 }
 324         }
 325
 326         if (new_assignment) {
 327                 logic_mux_data_invalid_ = true;
 328                 stack_config_changed_ = true;
 329                 commit_decoder_channels();
 330                 channels_updated();
 331         }
 332 }
 333
 334 void DecodeSignal::assign_signal(const uint16_t channel_id, const SignalBase *signal)
 335 {
 336         for (decode::DecodeChannel& ch : channels_)
 337                 if (ch.id == channel_id) {
 338                         ch.assigned_signal = signal;
 339                         logic_mux_data_invalid_ = true;
 340                 }
 341
 342         stack_config_changed_ = true;
 343         commit_decoder_channels();
 344         channels_updated();
 345         begin_decode();
 346 }
 347
 348 int DecodeSignal::get_assigned_signal_count() const
 349 {
 350         // Count all channels that have a signal assigned to them
 351         return count_if(channels_.begin(), channels_.end(),
 352                 [](decode::DecodeChannel ch) { return ch.assigned_signal; });
 353 }
 354
 355 void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state)
 356 {
 357         for (decode::DecodeChannel& ch : channels_)
 358                 if (ch.id == channel_id)
 359                         ch.initial_pin_state = init_state;
 360
 361         stack_config_changed_ = true;
 362         channels_updated();
 363         begin_decode();
 364 }
 365
 366 double DecodeSignal::samplerate() const
 367 {
 368         double result = 0;
 369
 370         // TODO For now, we simply return the first samplerate that we have
 371         if (segments_.size() > 0)
 372                 result = segments_.front().samplerate;
 373
 374         return result;
 375 }
 376
 377 const pv::util::Timestamp DecodeSignal::start_time() const
 378 {
 379         pv::util::Timestamp result;
 380
 381         // TODO For now, we simply return the first start time that we have
 382         if (segments_.size() > 0)
 383                 result = segments_.front().start_time;
 384
 385         return result;
 386 }
 387
 388 int64_t DecodeSignal::get_working_sample_count(uint32_t segment_id) const
 389 {
 390         // The working sample count is the highest sample number for
 391         // which all used signals have data available, so go through all
 392         // channels and use the lowest overall sample count of the segment
 393
 394         int64_t count = std::numeric_limits<int64_t>::max();
 395         bool no_signals_assigned = true;
 396
 397         for (const decode::DecodeChannel& ch : channels_)
 398                 if (ch.assigned_signal) {
 399                         no_signals_assigned = false;
 400
 401                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 402                         if (!logic_data || logic_data->logic_segments().empty())
 403                                 return 0;
 404
 405                         try {
 406                                 const shared_ptr<LogicSegment> segment = logic_data->logic_segments().at(segment_id);
 407                                 count = min(count, (int64_t)segment->get_sample_count());
 408                         } catch (out_of_range&) {
 409                                 return 0;
 410                         }
 411                 }
 412
 413         return (no_signals_assigned ? 0 : count);
 414 }
 415
 416 int64_t DecodeSignal::get_decoded_sample_count(uint32_t segment_id,
 417         bool include_processing) const
 418 {
 419         lock_guard<mutex> decode_lock(output_mutex_);
 420
 421         int64_t result = 0;
 422
 423         if (segment_id >= segments_.size())
 424                 return result;
 425
 426         if (include_processing)
 427                 result = segments_[segment_id].samples_decoded_incl;
 428         else
 429                 result = segments_[segment_id].samples_decoded_excl;
 430
 431         return result;
 432 }
 433
 434 vector<Row*> DecodeSignal::get_rows(bool visible_only)
 435 {
 436         vector<Row*> rows;
 437
 438         for (const shared_ptr<Decoder>& dec : stack_) {
 439                 assert(dec);
 440                 if (visible_only && !dec->shown())
 441                         continue;
 442
 443                 for (Row* row : dec->get_rows())
 444                         rows.push_back(row);
 445         }
 446
 447         return rows;
 448 }
 449
 450 vector<const Row*> DecodeSignal::get_rows(bool visible_only) const
 451 {
 452         vector<const Row*> rows;
 453
 454         for (const shared_ptr<Decoder>& dec : stack_) {
 455                 assert(dec);
 456                 if (visible_only && !dec->shown())
 457                         continue;
 458
 459                 for (const Row* row : dec->get_rows())
 460                         rows.push_back(row);
 461         }
 462
 463         return rows;
 464 }
 465
 466
 467 uint64_t DecodeSignal::get_annotation_count(const Row* row, uint32_t segment_id) const
 468 {
 469         if (segment_id >= segments_.size())
 470                 return 0;
 471
 472         const DecodeSegment* segment = &(segments_.at(segment_id));
 473
 474         auto row_it = segment->annotation_rows.find(row);
 475
 476         const RowData* rd;
 477         if (row_it == segment->annotation_rows.end()) {
 478                 // FIXME Use the fallback row, but how?
 479                 assert(false);
 480                 return 0;
 481         } else
 482                 rd = &(row_it->second);
 483
 484         return rd->get_annotation_count();
 485 }
 486
 487 void DecodeSignal::get_annotation_subset(vector<Annotation> &dest,
 488         const Row* row, uint32_t segment_id, uint64_t start_sample,
 489         uint64_t end_sample) const
 490 {
 491         lock_guard<mutex> lock(output_mutex_);
 492
 493         if (segment_id >= segments_.size())
 494                 return;
 495
 496         const DecodeSegment* segment = &(segments_.at(segment_id));
 497
 498         auto row_it = segment->annotation_rows.find(row);
 499
 500         const RowData* rd;
 501         if (row_it == segment->annotation_rows.end()) {
 502                 // FIXME Use the fallback row, but how?
 503                 assert(false);
 504                 return;
 505         } else
 506                 rd = &(row_it->second);
 507
 508         rd->get_annotation_subset(dest, start_sample, end_sample);
 509 }
 510
 511 void DecodeSignal::get_annotation_subset(vector<Annotation> &dest,
 512         uint32_t segment_id, uint64_t start_sample, uint64_t end_sample) const
 513 {
 514         // Use forward_lists for faster merging
 515         forward_list<Annotation> *all_ann_list = new forward_list<Annotation>();
 516
 517         vector<const Row*> rows = get_rows();
 518         for (const Row* row : rows) {
 519                 vector<Annotation> *ann_vector = new vector<Annotation>();
 520                 get_annotation_subset(*ann_vector, row, segment_id, start_sample, end_sample);
 521
 522                 forward_list<Annotation> *ann_list =
 523                         new forward_list<Annotation>(ann_vector->begin(), ann_vector->end());
 524                 delete ann_vector;
 525
 526                 all_ann_list->merge(*ann_list);
 527                 delete ann_list;
 528         }
 529
 530         move(all_ann_list->begin(), all_ann_list->end(), back_inserter(dest));
 531         delete all_ann_list;
 532 }
 533
 534 uint32_t DecodeSignal::get_binary_data_chunk_count(uint32_t segment_id,
 535         const Decoder* dec, uint32_t bin_class_id) const
 536 {
 537         if (segments_.size() == 0)
 538                 return 0;
 539
 540         try {
 541                 const DecodeSegment *segment = &(segments_.at(segment_id));
 542
 543                 for (const DecodeBinaryClass& bc : segment->binary_classes)
 544                         if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 545                                 return bc.chunks.size();
 546         } catch (out_of_range&) {
 547                 // Do nothing
 548         }
 549
 550         return 0;
 551 }
 552
 553 void DecodeSignal::get_binary_data_chunk(uint32_t segment_id,
 554         const  Decoder* dec, uint32_t bin_class_id, uint32_t chunk_id,
 555         const vector<uint8_t> **dest, uint64_t *size)
 556 {
 557         try {
 558                 const DecodeSegment *segment = &(segments_.at(segment_id));
 559
 560                 for (const DecodeBinaryClass& bc : segment->binary_classes)
 561                         if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id)) {
 562                                 if (dest) *dest = &(bc.chunks.at(chunk_id).data);
 563                                 if (size) *size = bc.chunks.at(chunk_id).data.size();
 564                                 return;
 565                         }
 566         } catch (out_of_range&) {
 567                 // Do nothing
 568         }
 569 }
 570
 571 void DecodeSignal::get_merged_binary_data_chunks_by_sample(uint32_t segment_id,
 572         const Decoder* dec, uint32_t bin_class_id, uint64_t start_sample,
 573         uint64_t end_sample, vector<uint8_t> *dest) const
 574 {
 575         assert(dest != nullptr);
 576
 577         try {
 578                 const DecodeSegment *segment = &(segments_.at(segment_id));
 579
 580                 const DecodeBinaryClass* bin_class = nullptr;
 581                 for (const DecodeBinaryClass& bc : segment->binary_classes)
 582                         if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 583                                 bin_class = &bc;
 584
 585                 // Determine overall size before copying to resize dest vector only once
 586                 uint64_t size = 0;
 587                 uint64_t matches = 0;
 588                 for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
 589                         if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
 590                                 size += chunk.data.size();
 591                                 matches++;
 592                         }
 593                 dest->resize(size);
 594
 595                 uint64_t offset = 0;
 596                 uint64_t matches2 = 0;
 597                 for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
 598                         if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
 599                                 memcpy(dest->data() + offset, chunk.data.data(), chunk.data.size());
 600                                 offset += chunk.data.size();
 601                                 matches2++;
 602
 603                                 // Make sure we don't overwrite memory if the array grew in the meanwhile
 604                                 if (matches2 == matches)
 605                                         break;
 606                         }
 607         } catch (out_of_range&) {
 608                 // Do nothing
 609         }
 610 }
 611
 612 void DecodeSignal::get_merged_binary_data_chunks_by_offset(uint32_t segment_id,
 613         const Decoder* dec, uint32_t bin_class_id, uint64_t start, uint64_t end,
 614         vector<uint8_t> *dest) const
 615 {
 616         assert(dest != nullptr);
 617
 618         try {
 619                 const DecodeSegment *segment = &(segments_.at(segment_id));
 620
 621                 const DecodeBinaryClass* bin_class = nullptr;
 622                 for (const DecodeBinaryClass& bc : segment->binary_classes)
 623                         if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 624                                 bin_class = &bc;
 625
 626                 // Determine overall size before copying to resize dest vector only once
 627                 uint64_t size = 0;
 628                 uint64_t offset = 0;
 629                 for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
 630                         if (offset >= start)
 631                                 size += chunk.data.size();
 632                         offset += chunk.data.size();
 633                         if (offset >= end)
 634                                 break;
 635                 }
 636                 dest->resize(size);
 637
 638                 offset = 0;
 639                 uint64_t dest_offset = 0;
 640                 for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
 641                         if (offset >= start) {
 642                                 memcpy(dest->data() + dest_offset, chunk.data.data(), chunk.data.size());
 643                                 dest_offset += chunk.data.size();
 644                         }
 645                         offset += chunk.data.size();
 646                         if (offset >= end)
 647                                 break;
 648                 }
 649         } catch (out_of_range&) {
 650                 // Do nothing
 651         }
 652 }
 653
 654 const DecodeBinaryClass* DecodeSignal::get_binary_data_class(uint32_t segment_id,
 655         const Decoder* dec, uint32_t bin_class_id) const
 656 {
 657         try {
 658                 const DecodeSegment *segment = &(segments_.at(segment_id));
 659
 660                 for (const DecodeBinaryClass& bc : segment->binary_classes)
 661                         if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 662                                 return &bc;
 663         } catch (out_of_range&) {
 664                 // Do nothing
 665         }
 666
 667         return nullptr;
 668 }
 669
 670 void DecodeSignal::save_settings(QSettings &settings) const
 671 {
 672         SignalBase::save_settings(settings);
 673
 674         settings.setValue("decoders", (int)(stack_.size()));
 675
 676         // Save decoder stack
 677         int decoder_idx = 0;
 678         for (const shared_ptr<Decoder>& decoder : stack_) {
 679                 settings.beginGroup("decoder" + QString::number(decoder_idx++));
 680
 681                 settings.setValue("id", decoder->get_srd_decoder()->id);
 682                 settings.setValue("shown", decoder->shown());
 683
 684                 // Save decoder options
 685                 const map<string, GVariant*>& options = decoder->options();
 686
 687                 settings.setValue("options", (int)options.size());
 688
 689                 // Note: Decoder::options() returns only the options
 690                 // that differ from the default. See binding::Decoder::getter()
 691                 int i = 0;
 692                 for (auto& option : options) {
 693                         settings.beginGroup("option" + QString::number(i));
 694                         settings.setValue("name", QString::fromStdString(option.first));
 695                         GlobalSettings::store_gvariant(settings, option.second);
 696                         settings.endGroup();
 697                         i++;
 698                 }
 699
 700                 settings.endGroup();
 701         }
 702
 703         // Save channel mapping
 704         settings.setValue("channels", (int)channels_.size());
 705
 706         for (unsigned int channel_id = 0; channel_id < channels_.size(); channel_id++) {
 707                 auto channel = find_if(channels_.begin(), channels_.end(),
 708                         [&](decode::DecodeChannel ch) { return ch.id == channel_id; });
 709
 710                 if (channel == channels_.end()) {
 711                         qDebug() << "ERROR: Gap in channel index:" << channel_id;
 712                         continue;
 713                 }
 714
 715                 settings.beginGroup("channel" + QString::number(channel_id));
 716
 717                 settings.setValue("name", channel->name);  // Useful for debugging
 718                 settings.setValue("initial_pin_state", channel->initial_pin_state);
 719
 720                 if (channel->assigned_signal)
 721                         settings.setValue("assigned_signal_name", channel->assigned_signal->name());
 722
 723                 settings.endGroup();
 724         }
 725 }
 726
 727 void DecodeSignal::restore_settings(QSettings &settings)
 728 {
 729         SignalBase::restore_settings(settings);
 730
 731         // Restore decoder stack
 732         GSList *dec_list = g_slist_copy((GSList*)srd_decoder_list());
 733
 734         int decoders = settings.value("decoders").toInt();
 735
 736         for (int decoder_idx = 0; decoder_idx < decoders; decoder_idx++) {
 737                 settings.beginGroup("decoder" + QString::number(decoder_idx));
 738
 739                 QString id = settings.value("id").toString();
 740
 741                 for (GSList *entry = dec_list; entry; entry = entry->next) {
 742                         const srd_decoder *dec = (srd_decoder*)entry->data;
 743                         if (!dec)
 744                                 continue;
 745
 746                         if (QString::fromUtf8(dec->id) == id) {
 747                                 shared_ptr<Decoder> decoder = make_shared<Decoder>(dec);
 748
 749                                 stack_.push_back(decoder);
 750                                 decoder->show(settings.value("shown", true).toBool());
 751
 752                                 // Restore decoder options that differ from their default
 753                                 int options = settings.value("options").toInt();
 754
 755                                 for (int i = 0; i < options; i++) {
 756                                         settings.beginGroup("option" + QString::number(i));
 757                                         QString name = settings.value("name").toString();
 758                                         GVariant *value = GlobalSettings::restore_gvariant(settings);
 759                                         decoder->set_option(name.toUtf8(), value);
 760                                         settings.endGroup();
 761                                 }
 762
 763                                 // Include the newly created decode channels in the channel lists
 764                                 update_channel_list();
 765                                 break;
 766                         }
 767                 }
 768
 769                 settings.endGroup();
 770                 channels_updated();
 771         }
 772
 773         // Restore channel mapping
 774         unsigned int channels = settings.value("channels").toInt();
 775
 776         const unordered_set< shared_ptr<data::SignalBase> > signalbases =
 777                 session_.signalbases();
 778
 779         for (unsigned int channel_id = 0; channel_id < channels; channel_id++) {
 780                 auto channel = find_if(channels_.begin(), channels_.end(),
 781                         [&](decode::DecodeChannel ch) { return ch.id == channel_id; });
 782
 783                 if (channel == channels_.end()) {
 784                         qDebug() << "ERROR: Non-existant channel index:" << channel_id;
 785                         continue;
 786                 }
 787
 788                 settings.beginGroup("channel" + QString::number(channel_id));
 789
 790                 QString assigned_signal_name = settings.value("assigned_signal_name").toString();
 791
 792                 for (const shared_ptr<data::SignalBase>& signal : signalbases)
 793                         if (signal->name() == assigned_signal_name)
 794                                 channel->assigned_signal = signal.get();
 795
 796                 channel->initial_pin_state = settings.value("initial_pin_state").toInt();
 797
 798                 settings.endGroup();
 799         }
 800
 801         // Update the internal structures
 802         stack_config_changed_ = true;
 803         update_channel_list();
 804         commit_decoder_channels();
 805
 806         begin_decode();
 807 }
 808
 809 void DecodeSignal::set_error_message(QString msg)
 810 {
 811         error_message_ = msg;
 812         // TODO Emulate noquote()
 813         qDebug().nospace() << name() << ": " << msg;
 814 }
 815
 816 uint32_t DecodeSignal::get_input_segment_count() const
 817 {
 818         uint64_t count = std::numeric_limits<uint64_t>::max();
 819         bool no_signals_assigned = true;
 820
 821         for (const decode::DecodeChannel& ch : channels_)
 822                 if (ch.assigned_signal) {
 823                         no_signals_assigned = false;
 824
 825                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 826                         if (!logic_data || logic_data->logic_segments().empty())
 827                                 return 0;
 828
 829                         // Find the min value of all segment counts
 830                         if ((uint64_t)(logic_data->logic_segments().size()) < count)
 831                                 count = logic_data->logic_segments().size();
 832                 }
 833
 834         return (no_signals_assigned ? 0 : count);
 835 }
 836
 837 uint32_t DecodeSignal::get_input_samplerate(uint32_t segment_id) const
 838 {
 839         double samplerate = 0;
 840
 841         for (const decode::DecodeChannel& ch : channels_)
 842                 if (ch.assigned_signal) {
 843                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 844                         if (!logic_data || logic_data->logic_segments().empty())
 845                                 continue;
 846
 847                         try {
 848                                 const shared_ptr<LogicSegment> segment = logic_data->logic_segments().at(segment_id);
 849                                 samplerate = segment->samplerate();
 850                         } catch (out_of_range&) {
 851                                 // Do nothing
 852                         }
 853                         break;
 854                 }
 855
 856         return samplerate;
 857 }
 858
 859 Decoder* DecodeSignal::get_decoder_by_instance(const srd_decoder *const srd_dec)
 860 {
 861         for (shared_ptr<Decoder>& d : stack_)
 862                 if (d->get_srd_decoder() == srd_dec)
 863                         return d.get();
 864
 865         return nullptr;
 866 }
 867
 868 void DecodeSignal::update_channel_list()
 869 {
 870         vector<decode::DecodeChannel> prev_channels = channels_;
 871         channels_.clear();
 872
 873         uint16_t id = 0;
 874
 875         // Copy existing entries, create new as needed
 876         for (shared_ptr<Decoder>& decoder : stack_) {
 877                 const srd_decoder* srd_dec = decoder->get_srd_decoder();
 878                 const GSList *l;
 879
 880                 // Mandatory channels
 881                 for (l = srd_dec->channels; l; l = l->next) {
 882                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 883                         bool ch_added = false;
 884
 885                         // Copy but update ID if this channel was in the list before
 886                         for (decode::DecodeChannel& ch : prev_channels)
 887                                 if (ch.pdch_ == pdch) {
 888                                         ch.id = id++;
 889                                         channels_.push_back(ch);
 890                                         ch_added = true;
 891                                         break;
 892                                 }
 893
 894                         if (!ch_added) {
 895                                 // Create new entry without a mapped signal
 896                                 decode::DecodeChannel ch = {id++, 0, false, nullptr,
 897                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 898                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 899                                 channels_.push_back(ch);
 900                         }
 901                 }
 902
 903                 // Optional channels
 904                 for (l = srd_dec->opt_channels; l; l = l->next) {
 905                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 906                         bool ch_added = false;
 907
 908                         // Copy but update ID if this channel was in the list before
 909                         for (decode::DecodeChannel& ch : prev_channels)
 910                                 if (ch.pdch_ == pdch) {
 911                                         ch.id = id++;
 912                                         channels_.push_back(ch);
 913                                         ch_added = true;
 914                                         break;
 915                                 }
 916
 917                         if (!ch_added) {
 918                                 // Create new entry without a mapped signal
 919                                 decode::DecodeChannel ch = {id++, 0, true, nullptr,
 920                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 921                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 922                                 channels_.push_back(ch);
 923                         }
 924                 }
 925         }
 926
 927         // Invalidate the logic output data if the channel assignment changed
 928         if (prev_channels.size() != channels_.size()) {
 929                 // The number of channels changed, there's definitely a difference
 930                 logic_mux_data_invalid_ = true;
 931         } else {
 932                 // Same number but assignment may still differ, so compare all channels
 933                 for (size_t i = 0; i < channels_.size(); i++) {
 934                         const decode::DecodeChannel& p_ch = prev_channels[i];
 935                         const decode::DecodeChannel& ch = channels_[i];
 936
 937                         if ((p_ch.pdch_ != ch.pdch_) ||
 938                                 (p_ch.assigned_signal != ch.assigned_signal)) {
 939                                 logic_mux_data_invalid_ = true;
 940                                 break;
 941                         }
 942                 }
 943
 944         }
 945
 946         channels_updated();
 947 }
 948
 949 void DecodeSignal::commit_decoder_channels()
 950 {
 951         // Submit channel list to every decoder, containing only the relevant channels
 952         for (shared_ptr<Decoder> dec : stack_) {
 953                 vector<decode::DecodeChannel*> channel_list;
 954
 955                 for (decode::DecodeChannel& ch : channels_)
 956                         if (ch.decoder_ == dec)
 957                                 channel_list.push_back(&ch);
 958
 959                 dec->set_channels(channel_list);
 960         }
 961
 962         // Channel bit IDs must be in sync with the channel's apperance in channels_
 963         int id = 0;
 964         for (decode::DecodeChannel& ch : channels_)
 965                 if (ch.assigned_signal)
 966                         ch.bit_id = id++;
 967 }
 968
 969 void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, const int64_t end)
 970 {
 971         // Enforce end to be greater than start
 972         if (end <= start)
 973                 return;
 974
 975         // Fetch the channel segments and their data
 976         vector<shared_ptr<LogicSegment> > segments;
 977         vector<const uint8_t*> signal_data;
 978         vector<uint8_t> signal_in_bytepos;
 979         vector<uint8_t> signal_in_bitpos;
 980
 981         for (decode::DecodeChannel& ch : channels_)
 982                 if (ch.assigned_signal) {
 983                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 984
 985                         shared_ptr<LogicSegment> segment;
 986                         try {
 987                                 segment = logic_data->logic_segments().at(segment_id);
 988                         } catch (out_of_range&) {
 989                                 qDebug() << "Muxer error for" << name() << ":" << ch.assigned_signal->name() \
 990                                         << "has no logic segment" << segment_id;
 991                                 return;
 992                         }
 993                         segments.push_back(segment);
 994
 995                         uint8_t* data = new uint8_t[(end - start) * segment->unit_size()];
 996                         segment->get_samples(start, end, data);
 997                         signal_data.push_back(data);
 998
 999                         const int bitpos = ch.assigned_signal->logic_bit_index();
1000                         signal_in_bytepos.push_back(bitpos / 8);
1001                         signal_in_bitpos.push_back(bitpos % 8);
1002                 }
1003
1004
1005         shared_ptr<LogicSegment> output_segment;
1006         try {
1007                 output_segment = logic_mux_data_->logic_segments().at(segment_id);
1008         } catch (out_of_range&) {
1009                 qDebug() << "Muxer error for" << name() << ": no logic mux segment" \
1010                         << segment_id << "in mux_logic_samples(), mux segments size is" \
1011                         << logic_mux_data_->logic_segments().size();
1012                 return;
1013         }
1014
1015         // Perform the muxing of signal data into the output data
1016         uint8_t* output = new uint8_t[(end - start) * output_segment->unit_size()];
1017         unsigned int signal_count = signal_data.size();
1018
1019         for (int64_t sample_cnt = 0; !logic_mux_interrupt_ && (sample_cnt < (end - start));
1020                 sample_cnt++) {
1021
1022                 int bitpos = 0;
1023                 uint8_t bytepos = 0;
1024
1025                 const int out_sample_pos = sample_cnt * output_segment->unit_size();
1026                 for (unsigned int i = 0; i < output_segment->unit_size(); i++)
1027                         output[out_sample_pos + i] = 0;
1028
1029                 for (unsigned int i = 0; i < signal_count; i++) {
1030                         const int in_sample_pos = sample_cnt * segments[i]->unit_size();
1031                         const uint8_t in_sample = 1 &
1032                                 ((signal_data[i][in_sample_pos + signal_in_bytepos[i]]) >> (signal_in_bitpos[i]));
1033
1034                         const uint8_t out_sample = output[out_sample_pos + bytepos];
1035
1036                         output[out_sample_pos + bytepos] = out_sample | (in_sample << bitpos);
1037
1038                         bitpos++;
1039                         if (bitpos > 7) {
1040                                 bitpos = 0;
1041                                 bytepos++;
1042                         }
1043                 }
1044         }
1045
1046         output_segment->append_payload(output, (end - start) * output_segment->unit_size());
1047         delete[] output;
1048
1049         for (const uint8_t* data : signal_data)
1050                 delete[] data;
1051 }
1052
1053 void DecodeSignal::logic_mux_proc()
1054 {
1055         uint32_t segment_id = 0;
1056
1057         assert(logic_mux_data_);
1058
1059         // Create initial logic mux segment
1060         shared_ptr<LogicSegment> output_segment =
1061                 make_shared<LogicSegment>(*logic_mux_data_, segment_id,
1062                         logic_mux_unit_size_, 0);
1063         logic_mux_data_->push_segment(output_segment);
1064
1065         output_segment->set_samplerate(get_input_samplerate(0));
1066
1067         do {
1068                 const uint64_t input_sample_count = get_working_sample_count(segment_id);
1069                 const uint64_t output_sample_count = output_segment->get_sample_count();
1070
1071                 const uint64_t samples_to_process =
1072                         (input_sample_count > output_sample_count) ?
1073                         (input_sample_count - output_sample_count) : 0;
1074
1075                 // Process the samples if necessary...
1076                 if (samples_to_process > 0) {
1077                         const uint64_t unit_size = output_segment->unit_size();
1078                         const uint64_t chunk_sample_count = DecodeChunkLength / unit_size;
1079
1080                         uint64_t processed_samples = 0;
1081                         do {
1082                                 const uint64_t start_sample = output_sample_count + processed_samples;
1083                                 const uint64_t sample_count =
1084                                         min(samples_to_process - processed_samples,     chunk_sample_count);
1085
1086                                 mux_logic_samples(segment_id, start_sample, start_sample + sample_count);
1087                                 processed_samples += sample_count;
1088
1089                                 // ...and process the newly muxed logic data
1090                                 decode_input_cond_.notify_one();
1091                         } while (!logic_mux_interrupt_ && (processed_samples < samples_to_process));
1092                 }
1093
1094                 if (samples_to_process == 0) {
1095                         // TODO Optimize this by caching the input segment count and only
1096                         // querying it when the cached value was reached
1097                         if (segment_id < get_input_segment_count() - 1) {
1098                                 // Process next segment
1099                                 segment_id++;
1100
1101                                 output_segment =
1102                                         make_shared<LogicSegment>(*logic_mux_data_, segment_id,
1103                                                 logic_mux_unit_size_, 0);
1104                                 logic_mux_data_->push_segment(output_segment);
1105
1106                                 output_segment->set_samplerate(get_input_samplerate(segment_id));
1107
1108                         } else {
1109                                 // All segments have been processed
1110                                 logic_mux_data_invalid_ = false;
1111
1112                                 // Wait for more input
1113                                 unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
1114                                 logic_mux_cond_.wait(logic_mux_lock);
1115                         }
1116                 }
1117
1118         } while (!logic_mux_interrupt_);
1119 }
1120
1121 void DecodeSignal::decode_data(
1122         const int64_t abs_start_samplenum, const int64_t sample_count,
1123         const shared_ptr<LogicSegment> input_segment)
1124 {
1125         const int64_t unit_size = input_segment->unit_size();
1126         const int64_t chunk_sample_count = DecodeChunkLength / unit_size;
1127
1128         for (int64_t i = abs_start_samplenum;
1129                 error_message_.isEmpty() && !decode_interrupt_ &&
1130                         (i < (abs_start_samplenum + sample_count));
1131                 i += chunk_sample_count) {
1132
1133                 const int64_t chunk_end = min(i + chunk_sample_count,
1134                         abs_start_samplenum + sample_count);
1135
1136                 {
1137                         lock_guard<mutex> lock(output_mutex_);
1138                         // Update the sample count showing the samples including currently processed ones
1139                         segments_.at(current_segment_id_).samples_decoded_incl = chunk_end;
1140                 }
1141
1142                 int64_t data_size = (chunk_end - i) * unit_size;
1143                 uint8_t* chunk = new uint8_t[data_size];
1144                 input_segment->get_samples(i, chunk_end, chunk);
1145
1146                 if (srd_session_send(srd_session_, i, chunk_end, chunk,
1147                                 data_size, unit_size) != SRD_OK)
1148                         set_error_message(tr("Decoder reported an error"));
1149
1150                 delete[] chunk;
1151
1152                 {
1153                         lock_guard<mutex> lock(output_mutex_);
1154                         // Now that all samples are processed, the exclusive sample count catches up
1155                         segments_.at(current_segment_id_).samples_decoded_excl = chunk_end;
1156                 }
1157
1158                 // Notify the frontend that we processed some data and
1159                 // possibly have new annotations as well
1160                 new_annotations();
1161
1162                 if (decode_paused_) {
1163                         unique_lock<mutex> pause_wait_lock(decode_pause_mutex_);
1164                         decode_pause_cond_.wait(pause_wait_lock);
1165                 }
1166         }
1167 }
1168
1169 void DecodeSignal::decode_proc()
1170 {
1171         current_segment_id_ = 0;
1172
1173         // If there is no input data available yet, wait until it is or we're interrupted
1174         if (logic_mux_data_->logic_segments().size() == 0) {
1175                 unique_lock<mutex> input_wait_lock(input_mutex_);
1176                 decode_input_cond_.wait(input_wait_lock);
1177         }
1178
1179         if (decode_interrupt_)
1180                 return;
1181
1182         shared_ptr<LogicSegment> input_segment = logic_mux_data_->logic_segments().front();
1183         assert(input_segment);
1184
1185         // Create the initial segment and set its sample rate so that we can pass it to SRD
1186         create_decode_segment();
1187         segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
1188         segments_.at(current_segment_id_).start_time = input_segment->start_time();
1189
1190         start_srd_session();
1191
1192         uint64_t sample_count = 0;
1193         uint64_t abs_start_samplenum = 0;
1194         do {
1195                 // Keep processing new samples until we exhaust the input data
1196                 do {
1197                         lock_guard<mutex> input_lock(input_mutex_);
1198                         sample_count = input_segment->get_sample_count() - abs_start_samplenum;
1199
1200                         if (sample_count > 0) {
1201                                 decode_data(abs_start_samplenum, sample_count, input_segment);
1202                                 abs_start_samplenum += sample_count;
1203                         }
1204                 } while (error_message_.isEmpty() && (sample_count > 0) && !decode_interrupt_);
1205
1206                 if (error_message_.isEmpty() && !decode_interrupt_ && sample_count == 0) {
1207                         if (current_segment_id_ < logic_mux_data_->logic_segments().size() - 1) {
1208                                 // Process next segment
1209                                 current_segment_id_++;
1210
1211                                 try {
1212                                         input_segment = logic_mux_data_->logic_segments().at(current_segment_id_);
1213                                 } catch (out_of_range&) {
1214                                         qDebug() << "Decode error for" << name() << ": no logic mux segment" \
1215                                                 << current_segment_id_ << "in decode_proc(), mux segments size is" \
1216                                                 << logic_mux_data_->logic_segments().size();
1217                                         return;
1218                                 }
1219                                 abs_start_samplenum = 0;
1220
1221                                 // Create the next segment and set its metadata
1222                                 create_decode_segment();
1223                                 segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
1224                                 segments_.at(current_segment_id_).start_time = input_segment->start_time();
1225
1226                                 // Reset decoder state but keep the decoder stack intact
1227                                 terminate_srd_session();
1228                         } else {
1229                                 // All segments have been processed
1230                                 decode_finished();
1231
1232                                 // Wait for new input data or an interrupt was requested
1233                                 unique_lock<mutex> input_wait_lock(input_mutex_);
1234                                 decode_input_cond_.wait(input_wait_lock);
1235                         }
1236                 }
1237         } while (error_message_.isEmpty() && !decode_interrupt_);
1238
1239         // Potentially reap decoders when the application no longer is
1240         // interested in their (pending) results.
1241         if (decode_interrupt_)
1242                 terminate_srd_session();
1243 }
1244
1245 void DecodeSignal::start_srd_session()
1246 {
1247         // If there were stack changes, the session has been destroyed by now, so if
1248         // it hasn't been destroyed, we can just reset and re-use it
1249         if (srd_session_) {
1250                 // When a decoder stack was created before, re-use it
1251                 // for the next stream of input data, after terminating
1252                 // potentially still executing operations, and resetting
1253                 // internal state. Skip the rather expensive (teardown
1254                 // and) construction of another decoder stack.
1255
1256                 // TODO Reduce redundancy, use a common code path for
1257                 // the meta/start sequence?
1258                 terminate_srd_session();
1259
1260                 // Metadata is cleared also, so re-set it
1261                 uint64_t samplerate = 0;
1262                 if (segments_.size() > 0)
1263                         samplerate = segments_.at(current_segment_id_).samplerate;
1264                 if (samplerate)
1265                         srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1266                                 g_variant_new_uint64(samplerate));
1267                 for (const shared_ptr<Decoder>& dec : stack_)
1268                         dec->apply_all_options();
1269                 srd_session_start(srd_session_);
1270
1271                 return;
1272         }
1273
1274         // Create the session
1275         srd_session_new(&srd_session_);
1276         assert(srd_session_);
1277
1278         // Create the decoders
1279         srd_decoder_inst *prev_di = nullptr;
1280         for (const shared_ptr<Decoder>& dec : stack_) {
1281                 srd_decoder_inst *const di = dec->create_decoder_inst(srd_session_);
1282
1283                 if (!di) {
1284                         set_error_message(tr("Failed to create decoder instance"));
1285                         srd_session_destroy(srd_session_);
1286                         srd_session_ = nullptr;
1287                         return;
1288                 }
1289
1290                 if (prev_di)
1291                         srd_inst_stack(srd_session_, prev_di, di);
1292
1293                 prev_di = di;
1294         }
1295
1296         // Start the session
1297         if (segments_.size() > 0)
1298                 srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1299                         g_variant_new_uint64(segments_.at(current_segment_id_).samplerate));
1300
1301         srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_ANN,
1302                 DecodeSignal::annotation_callback, this);
1303
1304         srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_BINARY,
1305                 DecodeSignal::binary_callback, this);
1306
1307         srd_session_start(srd_session_);
1308
1309         // We just recreated the srd session, so all stack changes are applied now
1310         stack_config_changed_ = false;
1311 }
1312
1313 void DecodeSignal::terminate_srd_session()
1314 {
1315         // Call the "terminate and reset" routine for the decoder stack
1316         // (if available). This does not harm those stacks which already
1317         // have completed their operation, and reduces response time for
1318         // those stacks which still are processing data while the
1319         // application no longer wants them to.
1320         if (srd_session_) {
1321                 srd_session_terminate_reset(srd_session_);
1322
1323                 // Metadata is cleared also, so re-set it
1324                 uint64_t samplerate = 0;
1325                 if (segments_.size() > 0)
1326                         samplerate = segments_.at(current_segment_id_).samplerate;
1327                 if (samplerate)
1328                         srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1329                                 g_variant_new_uint64(samplerate));
1330                 for (const shared_ptr<Decoder>& dec : stack_)
1331                         dec->apply_all_options();
1332         }
1333 }
1334
1335 void DecodeSignal::stop_srd_session()
1336 {
1337         if (srd_session_) {
1338                 // Destroy the session
1339                 srd_session_destroy(srd_session_);
1340                 srd_session_ = nullptr;
1341
1342                 // Mark the decoder instances as non-existant since they were deleted
1343                 for (const shared_ptr<Decoder>& dec : stack_)
1344                         dec->invalidate_decoder_inst();
1345         }
1346 }
1347
1348 void DecodeSignal::connect_input_notifiers()
1349 {
1350         // Disconnect the notification slot from the previous set of signals
1351         disconnect(this, SLOT(on_data_cleared()));
1352         disconnect(this, SLOT(on_data_received()));
1353
1354         // Connect the currently used signals to our slot
1355         for (decode::DecodeChannel& ch : channels_) {
1356                 if (!ch.assigned_signal)
1357                         continue;
1358
1359                 const data::SignalBase *signal = ch.assigned_signal;
1360                 connect(signal, SIGNAL(samples_cleared()),
1361                         this, SLOT(on_data_cleared()));
1362                 connect(signal, SIGNAL(samples_added(uint64_t, uint64_t, uint64_t)),
1363                         this, SLOT(on_data_received()));
1364         }
1365 }
1366
1367 void DecodeSignal::create_decode_segment()
1368 {
1369         // Create annotation segment
1370         segments_.emplace_back(DecodeSegment());
1371
1372         // Add annotation classes
1373         for (const shared_ptr<Decoder> dec : stack_)
1374                 for (Row* row : dec->get_rows())
1375                         segments_.back().annotation_rows.emplace(row, RowData(row));
1376
1377         // Prepare our binary output classes
1378         for (const shared_ptr<Decoder>& dec : stack_) {
1379                 uint32_t n = dec->get_binary_class_count();
1380
1381                 for (uint32_t i = 0; i < n; i++)
1382                         segments_.back().binary_classes.push_back(
1383                                 {dec.get(), dec->get_binary_class(i), deque<DecodeBinaryDataChunk>()});
1384         }
1385 }
1386
1387 void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signal)
1388 {
1389         assert(pdata);
1390         assert(decode_signal);
1391
1392         DecodeSignal *const ds = (DecodeSignal*)decode_signal;
1393         assert(ds);
1394
1395         if (ds->decode_interrupt_)
1396                 return;
1397
1398         lock_guard<mutex> lock(ds->output_mutex_);
1399
1400         // Get the decoder and the annotation data
1401         assert(pdata->pdo);
1402         assert(pdata->pdo->di);
1403         const srd_decoder *const srd_dec = pdata->pdo->di->decoder;
1404         assert(srd_dec);
1405
1406         const srd_proto_data_annotation *const pda = (const srd_proto_data_annotation*)pdata->data;
1407         assert(pda);
1408
1409         // Find the row
1410         Decoder* dec = ds->get_decoder_by_instance(srd_dec);
1411         assert(dec);
1412
1413         AnnotationClass* ann_class = dec->get_ann_class_by_id(pda->ann_class);
1414         assert(ann_class);
1415
1416         const Row* row = ann_class->row;
1417
1418         if (!row)
1419                 row = dec->get_row_by_id(0);
1420
1421         // Add the annotation
1422         ds->segments_[ds->current_segment_id_].annotation_rows.at(row).emplace_annotation(pdata);
1423 }
1424
1425 void DecodeSignal::binary_callback(srd_proto_data *pdata, void *decode_signal)
1426 {
1427         assert(pdata);
1428         assert(decode_signal);
1429
1430         DecodeSignal *const ds = (DecodeSignal*)decode_signal;
1431         assert(ds);
1432
1433         if (ds->decode_interrupt_)
1434                 return;
1435
1436         // Get the decoder and the binary data
1437         assert(pdata->pdo);
1438         assert(pdata->pdo->di);
1439         const srd_decoder *const srd_dec = pdata->pdo->di->decoder;
1440         assert(srd_dec);
1441
1442         const srd_proto_data_binary *const pdb = (const srd_proto_data_binary*)pdata->data;
1443         assert(pdb);
1444
1445         // Find the matching DecodeBinaryClass
1446         DecodeSegment* segment = &(ds->segments_.at(ds->current_segment_id_));
1447
1448         DecodeBinaryClass* bin_class = nullptr;
1449         for (DecodeBinaryClass& bc : segment->binary_classes)
1450                 if ((bc.decoder->get_srd_decoder() == srd_dec) &&
1451                         (bc.info->bin_class_id == (uint32_t)pdb->bin_class))
1452                         bin_class = &bc;
1453
1454         if (!bin_class) {
1455                 qWarning() << "Could not find valid DecodeBinaryClass in segment" <<
1456                                 ds->current_segment_id_ << "for binary class ID" << pdb->bin_class <<
1457                                 ", segment only knows" << segment->binary_classes.size() << "classes";
1458                 return;
1459         }
1460
1461         // Add the data chunk
1462         bin_class->chunks.emplace_back();
1463         DecodeBinaryDataChunk* chunk = &(bin_class->chunks.back());
1464
1465         chunk->sample = pdata->start_sample;
1466         chunk->data.resize(pdb->size);
1467         memcpy(chunk->data.data(), pdb->data, pdb->size);
1468
1469         Decoder* dec = ds->get_decoder_by_instance(srd_dec);
1470
1471         ds->new_binary_data(ds->current_segment_id_, (void*)dec, pdb->bin_class);
1472 }
1473
1474 void DecodeSignal::on_capture_state_changed(int state)
1475 {
1476         // If a new acquisition was started, we need to start decoding from scratch
1477         if (state == Session::Running) {
1478                 logic_mux_data_invalid_ = true;
1479                 begin_decode();
1480         }
1481 }
1482
1483 void DecodeSignal::on_data_cleared()
1484 {
1485         reset_decode();
1486 }
1487
1488 void DecodeSignal::on_data_received()
1489 {
1490         // If we detected a lack of input data when trying to start decoding,
1491         // we have set an error message. Only try again if we now have data
1492         // to work with
1493         if ((!error_message_.isEmpty()) && (get_input_segment_count() == 0))
1494                 return;
1495
1496         if (!logic_mux_thread_.joinable())
1497                 begin_decode();
1498         else
1499                 logic_mux_cond_.notify_one();
1500 }
1501
1502 } // namespace data
1503 } // namespace pv