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::lock_guard;
  37 using std::make_shared;
  38 using std::min;
  39 using std::out_of_range;
  40 using std::shared_ptr;
  41 using std::unique_lock;
  42 using pv::data::decode::AnnotationClass;
  43 using pv::data::decode::DecodeChannel;
  44
  45 namespace pv {
  46 namespace data {
  47
  48 const double DecodeSignal::DecodeMargin = 1.0;
  49 const double DecodeSignal::DecodeThreshold = 0.2;
  50 const int64_t DecodeSignal::DecodeChunkLength = 256 * 1024;
  51
  52
  53 DecodeSignal::DecodeSignal(pv::Session &session) :
  54         SignalBase(nullptr, SignalBase::DecodeChannel),
  55         session_(session),
  56         srd_session_(nullptr),
  57         logic_mux_data_invalid_(false),
  58         stack_config_changed_(true),
  59         current_segment_id_(0)
  60 {
  61         connect(&session_, SIGNAL(capture_state_changed(int)),
  62                 this, SLOT(on_capture_state_changed(int)));
  63 }
  64
  65 DecodeSignal::~DecodeSignal()
  66 {
  67         reset_decode(true);
  68 }
  69
  70 const vector< shared_ptr<Decoder> >& DecodeSignal::decoder_stack() const
  71 {
  72         return stack_;
  73 }
  74
  75 void DecodeSignal::stack_decoder(const srd_decoder *decoder, bool restart_decode)
  76 {
  77         assert(decoder);
  78
  79         // Set name if this decoder is the first in the list or the name is unchanged
  80         const srd_decoder* prev_dec = stack_.empty() ? nullptr : stack_.back()->get_srd_decoder();
  81         const QString prev_dec_name = prev_dec ? QString::fromUtf8(prev_dec->name) : QString();
  82
  83         if ((stack_.empty()) || ((stack_.size() > 0) && (name() == prev_dec_name)))
  84                 set_name(QString::fromUtf8(decoder->name));
  85
  86         const shared_ptr<Decoder> dec = make_shared<Decoder>(decoder, stack_.size());
  87         stack_.push_back(dec);
  88
  89         connect(dec.get(), SIGNAL(annotation_visibility_changed()),
  90                 this, SLOT(on_annotation_visibility_changed()));
  91
  92         // Include the newly created decode channels in the channel lists
  93         update_channel_list();
  94
  95         stack_config_changed_ = true;
  96         auto_assign_signals(dec);
  97         commit_decoder_channels();
  98
  99         decoder_stacked((void*)dec.get());
 100
 101         if (restart_decode)
 102                 begin_decode();
 103 }
 104
 105 void DecodeSignal::remove_decoder(int index)
 106 {
 107         assert(index >= 0);
 108         assert(index < (int)stack_.size());
 109
 110         // Find the decoder in the stack
 111         auto iter = stack_.begin() + index;
 112         assert(iter != stack_.end());
 113
 114         shared_ptr<Decoder> dec = *iter;
 115
 116         decoder_removed(dec.get());
 117
 118         // Delete the element
 119         stack_.erase(iter);
 120
 121         // Update channels and decoded data
 122         stack_config_changed_ = true;
 123         update_channel_list();
 124         begin_decode();
 125 }
 126
 127 bool DecodeSignal::toggle_decoder_visibility(int index)
 128 {
 129         auto iter = stack_.cbegin();
 130         for (int i = 0; i < index; i++, iter++)
 131                 assert(iter != stack_.end());
 132
 133         shared_ptr<Decoder> dec = *iter;
 134
 135         // Toggle decoder visibility
 136         bool state = false;
 137         if (dec) {
 138                 state = !dec->visible();
 139                 dec->set_visible(state);
 140         }
 141
 142         return state;
 143 }
 144
 145 void DecodeSignal::reset_decode(bool shutting_down)
 146 {
 147         resume_decode();  // Make sure the decode thread isn't blocked by pausing
 148
 149         if (stack_config_changed_ || shutting_down)
 150                 stop_srd_session();
 151         else
 152                 terminate_srd_session();
 153
 154         if (decode_thread_.joinable()) {
 155                 decode_interrupt_ = true;
 156                 decode_input_cond_.notify_one();
 157                 decode_thread_.join();
 158         }
 159
 160         if (logic_mux_thread_.joinable()) {
 161                 logic_mux_interrupt_ = true;
 162                 logic_mux_cond_.notify_one();
 163                 logic_mux_thread_.join();
 164         }
 165
 166         current_segment_id_ = 0;
 167         segments_.clear();
 168
 169         logic_mux_data_.reset();
 170         logic_mux_data_invalid_ = true;
 171
 172         if (!error_message_.isEmpty()) {
 173                 error_message_.clear();
 174                 // TODO Emulate noquote()
 175                 qDebug().nospace() << name() << ": Error cleared";
 176         }
 177
 178         decode_reset();
 179 }
 180
 181 void DecodeSignal::begin_decode()
 182 {
 183         if (decode_thread_.joinable()) {
 184                 decode_interrupt_ = true;
 185                 decode_input_cond_.notify_one();
 186                 decode_thread_.join();
 187         }
 188
 189         if (logic_mux_thread_.joinable()) {
 190                 logic_mux_interrupt_ = true;
 191                 logic_mux_cond_.notify_one();
 192                 logic_mux_thread_.join();
 193         }
 194
 195         reset_decode();
 196
 197         if (stack_.size() == 0) {
 198                 set_error_message(tr("No decoders"));
 199                 return;
 200         }
 201
 202         assert(channels_.size() > 0);
 203
 204         if (get_assigned_signal_count() == 0) {
 205                 set_error_message(tr("There are no channels assigned to this decoder"));
 206                 return;
 207         }
 208
 209         // Make sure that all assigned channels still provide logic data
 210         // (can happen when a converted signal was assigned but the
 211         // conversion removed in the meanwhile)
 212         for (decode::DecodeChannel& ch : channels_)
 213                 if (ch.assigned_signal && !(ch.assigned_signal->logic_data() != nullptr))
 214                         ch.assigned_signal = nullptr;
 215
 216         // Check that all decoders have the required channels
 217         for (const shared_ptr<Decoder>& dec : stack_)
 218                 if (!dec->have_required_channels()) {
 219                         set_error_message(tr("One or more required channels "
 220                                 "have not been specified"));
 221                         return;
 222                 }
 223
 224         // Free the logic data and its segment(s) if it needs to be updated
 225         if (logic_mux_data_invalid_)
 226                 logic_mux_data_.reset();
 227
 228         if (!logic_mux_data_) {
 229                 const uint32_t ch_count = get_assigned_signal_count();
 230                 logic_mux_unit_size_ = (ch_count + 7) / 8;
 231                 logic_mux_data_ = make_shared<Logic>(ch_count);
 232         }
 233
 234         // Receive notifications when new sample data is available
 235         connect_input_notifiers();
 236
 237         if (get_input_segment_count() == 0)
 238                 set_error_message(tr("No input data"));
 239
 240         // Make sure the logic output data is complete and up-to-date
 241         logic_mux_interrupt_ = false;
 242         logic_mux_thread_ = std::thread(&DecodeSignal::logic_mux_proc, this);
 243
 244         // Decode the muxed logic data
 245         decode_interrupt_ = false;
 246         decode_thread_ = std::thread(&DecodeSignal::decode_proc, this);
 247 }
 248
 249 void DecodeSignal::pause_decode()
 250 {
 251         decode_paused_ = true;
 252 }
 253
 254 void DecodeSignal::resume_decode()
 255 {
 256         // Manual unlocking is done before notifying, to avoid waking up the
 257         // waiting thread only to block again (see notify_one for details)
 258         decode_pause_mutex_.unlock();
 259         decode_pause_cond_.notify_one();
 260         decode_paused_ = false;
 261 }
 262
 263 bool DecodeSignal::is_paused() const
 264 {
 265         return decode_paused_;
 266 }
 267
 268 const vector<decode::DecodeChannel> DecodeSignal::get_channels() const
 269 {
 270         return channels_;
 271 }
 272
 273 void DecodeSignal::auto_assign_signals(const shared_ptr<Decoder> dec)
 274 {
 275         bool new_assignment = false;
 276
 277         // Try to auto-select channels that don't have signals assigned yet
 278         for (decode::DecodeChannel& ch : channels_) {
 279                 // If a decoder is given, auto-assign only its channels
 280                 if (dec && (ch.decoder_ != dec))
 281                         continue;
 282
 283                 if (ch.assigned_signal)
 284                         continue;
 285
 286                 QString ch_name = ch.name.toLower();
 287                 ch_name = ch_name.replace(QRegExp("[-_.]"), " ");
 288
 289                 shared_ptr<data::SignalBase> match;
 290                 for (const shared_ptr<data::SignalBase>& s : session_.signalbases()) {
 291                         if (!s->enabled())
 292                                 continue;
 293
 294                         QString s_name = s->name().toLower();
 295                         s_name = s_name.replace(QRegExp("[-_.]"), " ");
 296
 297                         if (s->logic_data() &&
 298                                 ((ch_name.contains(s_name)) || (s_name.contains(ch_name)))) {
 299                                 if (!match)
 300                                         match = s;
 301                                 else {
 302                                         // Only replace an existing match if it matches more characters
 303                                         int old_unmatched = ch_name.length() - match->name().length();
 304                                         int new_unmatched = ch_name.length() - s->name().length();
 305                                         if (abs(new_unmatched) < abs(old_unmatched))
 306                                                 match = s;
 307                                 }
 308                         }
 309                 }
 310
 311                 if (match) {
 312                         ch.assigned_signal = match;
 313                         new_assignment = true;
 314                 }
 315         }
 316
 317         if (new_assignment) {
 318                 logic_mux_data_invalid_ = true;
 319                 stack_config_changed_ = true;
 320                 commit_decoder_channels();
 321                 channels_updated();
 322         }
 323 }
 324
 325 void DecodeSignal::assign_signal(const uint16_t channel_id, shared_ptr<const SignalBase> signal)
 326 {
 327         for (decode::DecodeChannel& ch : channels_)
 328                 if (ch.id == channel_id) {
 329                         ch.assigned_signal = signal;
 330                         logic_mux_data_invalid_ = true;
 331                 }
 332
 333         stack_config_changed_ = true;
 334         commit_decoder_channels();
 335         channels_updated();
 336         begin_decode();
 337 }
 338
 339 int DecodeSignal::get_assigned_signal_count() const
 340 {
 341         // Count all channels that have a signal assigned to them
 342         return count_if(channels_.begin(), channels_.end(),
 343                 [](decode::DecodeChannel ch) { return ch.assigned_signal.get(); });
 344 }
 345
 346 void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state)
 347 {
 348         for (decode::DecodeChannel& ch : channels_)
 349                 if (ch.id == channel_id)
 350                         ch.initial_pin_state = init_state;
 351
 352         stack_config_changed_ = true;
 353         channels_updated();
 354         begin_decode();
 355 }
 356
 357 double DecodeSignal::get_samplerate() const
 358 {
 359         double result = 0;
 360
 361         // TODO For now, we simply return the first samplerate that we have
 362         if (segments_.size() > 0)
 363                 result = segments_.front().samplerate;
 364
 365         return result;
 366 }
 367
 368 const pv::util::Timestamp DecodeSignal::start_time() const
 369 {
 370         pv::util::Timestamp result;
 371
 372         // TODO For now, we simply return the first start time that we have
 373         if (segments_.size() > 0)
 374                 result = segments_.front().start_time;
 375
 376         return result;
 377 }
 378
 379 int64_t DecodeSignal::get_working_sample_count(uint32_t segment_id) const
 380 {
 381         // The working sample count is the highest sample number for
 382         // which all used signals have data available, so go through all
 383         // channels and use the lowest overall sample count of the segment
 384
 385         int64_t count = std::numeric_limits<int64_t>::max();
 386         bool no_signals_assigned = true;
 387
 388         for (const decode::DecodeChannel& ch : channels_)
 389                 if (ch.assigned_signal) {
 390                         if (!ch.assigned_signal->logic_data())
 391                                 return 0;
 392
 393                         no_signals_assigned = false;
 394
 395                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 396                         if (logic_data->logic_segments().empty())
 397                                 return 0;
 398
 399                         if (segment_id >= logic_data->logic_segments().size())
 400                                 return 0;
 401
 402                         const shared_ptr<const LogicSegment> segment = logic_data->logic_segments()[segment_id]->get_shared_ptr();
 403                         if (segment)
 404                                 count = min(count, (int64_t)segment->get_sample_count());
 405                 }
 406
 407         return (no_signals_assigned ? 0 : count);
 408 }
 409
 410 int64_t DecodeSignal::get_decoded_sample_count(uint32_t segment_id,
 411         bool include_processing) const
 412 {
 413         lock_guard<mutex> decode_lock(output_mutex_);
 414
 415         int64_t result = 0;
 416
 417         if (segment_id >= segments_.size())
 418                 return result;
 419
 420         if (include_processing)
 421                 result = segments_[segment_id].samples_decoded_incl;
 422         else
 423                 result = segments_[segment_id].samples_decoded_excl;
 424
 425         return result;
 426 }
 427
 428 vector<Row*> DecodeSignal::get_rows(bool visible_only)
 429 {
 430         vector<Row*> rows;
 431
 432         for (const shared_ptr<Decoder>& dec : stack_) {
 433                 assert(dec);
 434                 if (visible_only && !dec->visible())
 435                         continue;
 436
 437                 for (Row* row : dec->get_rows())
 438                         rows.push_back(row);
 439         }
 440
 441         return rows;
 442 }
 443
 444 vector<const Row*> DecodeSignal::get_rows(bool visible_only) const
 445 {
 446         vector<const Row*> rows;
 447
 448         for (const shared_ptr<Decoder>& dec : stack_) {
 449                 assert(dec);
 450                 if (visible_only && !dec->visible())
 451                         continue;
 452
 453                 for (const Row* row : dec->get_rows())
 454                         rows.push_back(row);
 455         }
 456
 457         return rows;
 458 }
 459
 460
 461 uint64_t DecodeSignal::get_annotation_count(const Row* row, uint32_t segment_id) const
 462 {
 463         if (segment_id >= segments_.size())
 464                 return 0;
 465
 466         const DecodeSegment* segment = &(segments_.at(segment_id));
 467
 468         auto row_it = segment->annotation_rows.find(row);
 469
 470         const RowData* rd;
 471         if (row_it == segment->annotation_rows.end())
 472                 return 0;
 473         else
 474                 rd = &(row_it->second);
 475
 476         return rd->get_annotation_count();
 477 }
 478
 479 void DecodeSignal::get_annotation_subset(deque<const Annotation*> &dest,
 480         const Row* row, uint32_t segment_id, uint64_t start_sample,
 481         uint64_t end_sample) const
 482 {
 483         lock_guard<mutex> lock(output_mutex_);
 484
 485         if (segment_id >= segments_.size())
 486                 return;
 487
 488         const DecodeSegment* segment = &(segments_.at(segment_id));
 489
 490         auto row_it = segment->annotation_rows.find(row);
 491
 492         const RowData* rd;
 493         if (row_it == segment->annotation_rows.end())
 494                 return;
 495         else
 496                 rd = &(row_it->second);
 497
 498         rd->get_annotation_subset(dest, start_sample, end_sample);
 499 }
 500
 501 void DecodeSignal::get_annotation_subset(deque<const Annotation*> &dest,
 502         uint32_t segment_id, uint64_t start_sample, uint64_t end_sample) const
 503 {
 504         for (const Row* row : get_rows())
 505                 get_annotation_subset(dest, row, segment_id, start_sample, end_sample);
 506 }
 507
 508 uint32_t DecodeSignal::get_binary_data_chunk_count(uint32_t segment_id,
 509         const Decoder* dec, uint32_t bin_class_id) const
 510 {
 511         if ((segments_.size() == 0) || (segment_id >= segments_.size()))
 512                 return 0;
 513
 514         const DecodeSegment *segment = &(segments_[segment_id]);
 515
 516         for (const DecodeBinaryClass& bc : segment->binary_classes)
 517                 if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 518                         return bc.chunks.size();
 519
 520         return 0;
 521 }
 522
 523 void DecodeSignal::get_binary_data_chunk(uint32_t segment_id,
 524         const  Decoder* dec, uint32_t bin_class_id, uint32_t chunk_id,
 525         const vector<uint8_t> **dest, uint64_t *size)
 526 {
 527         if (segment_id >= segments_.size())
 528                 return;
 529
 530         const DecodeSegment *segment = &(segments_[segment_id]);
 531
 532         for (const DecodeBinaryClass& bc : segment->binary_classes)
 533                 if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id)) {
 534                         if (dest) *dest = &(bc.chunks.at(chunk_id).data);
 535                         if (size) *size = bc.chunks.at(chunk_id).data.size();
 536                         return;
 537                 }
 538 }
 539
 540 void DecodeSignal::get_merged_binary_data_chunks_by_sample(uint32_t segment_id,
 541         const Decoder* dec, uint32_t bin_class_id, uint64_t start_sample,
 542         uint64_t end_sample, vector<uint8_t> *dest) const
 543 {
 544         assert(dest != nullptr);
 545
 546         if (segment_id >= segments_.size())
 547                 return;
 548
 549         const DecodeSegment *segment = &(segments_[segment_id]);
 550
 551         const DecodeBinaryClass* bin_class = nullptr;
 552         for (const DecodeBinaryClass& bc : segment->binary_classes)
 553                 if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 554                         bin_class = &bc;
 555
 556         // Determine overall size before copying to resize dest vector only once
 557         uint64_t size = 0;
 558         uint64_t matches = 0;
 559         for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
 560                 if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
 561                         size += chunk.data.size();
 562                         matches++;
 563                 }
 564         dest->resize(size);
 565
 566         uint64_t offset = 0;
 567         uint64_t matches2 = 0;
 568         for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
 569                 if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
 570                         memcpy(dest->data() + offset, chunk.data.data(), chunk.data.size());
 571                         offset += chunk.data.size();
 572                         matches2++;
 573
 574                         // Make sure we don't overwrite memory if the array grew in the meanwhile
 575                         if (matches2 == matches)
 576                                 break;
 577                 }
 578 }
 579
 580 void DecodeSignal::get_merged_binary_data_chunks_by_offset(uint32_t segment_id,
 581         const Decoder* dec, uint32_t bin_class_id, uint64_t start, uint64_t end,
 582         vector<uint8_t> *dest) const
 583 {
 584         assert(dest != nullptr);
 585
 586         if (segment_id >= segments_.size())
 587                 return;
 588
 589         const DecodeSegment *segment = &(segments_[segment_id]);
 590
 591         const DecodeBinaryClass* bin_class = nullptr;
 592         for (const DecodeBinaryClass& bc : segment->binary_classes)
 593                 if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 594                         bin_class = &bc;
 595
 596         // Determine overall size before copying to resize dest vector only once
 597         uint64_t size = 0;
 598         uint64_t offset = 0;
 599         for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
 600                 if (offset >= start)
 601                         size += chunk.data.size();
 602                 offset += chunk.data.size();
 603                 if (offset >= end)
 604                         break;
 605         }
 606         dest->resize(size);
 607
 608         offset = 0;
 609         uint64_t dest_offset = 0;
 610         for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
 611                 if (offset >= start) {
 612                         memcpy(dest->data() + dest_offset, chunk.data.data(), chunk.data.size());
 613                         dest_offset += chunk.data.size();
 614                 }
 615                 offset += chunk.data.size();
 616                 if (offset >= end)
 617                         break;
 618         }
 619 }
 620
 621 const DecodeBinaryClass* DecodeSignal::get_binary_data_class(uint32_t segment_id,
 622         const Decoder* dec, uint32_t bin_class_id) const
 623 {
 624         if (segment_id >= segments_.size())
 625                 return nullptr;
 626
 627         const DecodeSegment *segment = &(segments_[segment_id]);
 628
 629         for (const DecodeBinaryClass& bc : segment->binary_classes)
 630                 if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
 631                         return &bc;
 632
 633         return nullptr;
 634 }
 635
 636 const deque<const Annotation*>* DecodeSignal::get_all_annotations_by_segment(
 637         uint32_t segment_id) const
 638 {
 639         if (segment_id >= segments_.size())
 640                 return nullptr;
 641
 642         const DecodeSegment *segment = &(segments_[segment_id]);
 643
 644         return &(segment->all_annotations);
 645 }
 646
 647 void DecodeSignal::save_settings(QSettings &settings) const
 648 {
 649         SignalBase::save_settings(settings);
 650
 651         settings.setValue("decoders", (int)(stack_.size()));
 652
 653         // Save decoder stack
 654         int decoder_idx = 0;
 655         for (const shared_ptr<Decoder>& decoder : stack_) {
 656                 settings.beginGroup("decoder" + QString::number(decoder_idx++));
 657
 658                 settings.setValue("id", decoder->get_srd_decoder()->id);
 659                 settings.setValue("visible", decoder->visible());
 660
 661                 // Save decoder options
 662                 const map<string, GVariant*>& options = decoder->options();
 663
 664                 settings.setValue("options", (int)options.size());
 665
 666                 // Note: Decoder::options() returns only the options
 667                 // that differ from the default. See binding::Decoder::getter()
 668                 int i = 0;
 669                 for (auto& option : options) {
 670                         settings.beginGroup("option" + QString::number(i));
 671                         settings.setValue("name", QString::fromStdString(option.first));
 672                         GlobalSettings::store_gvariant(settings, option.second);
 673                         settings.endGroup();
 674                         i++;
 675                 }
 676
 677                 // Save row properties
 678                 i = 0;
 679                 for (const Row* row : decoder->get_rows()) {
 680                         settings.beginGroup("row" + QString::number(i));
 681                         settings.setValue("visible", row->visible());
 682                         settings.endGroup();
 683                         i++;
 684                 }
 685
 686                 // Save class properties
 687                 i = 0;
 688                 for (const AnnotationClass* ann_class : decoder->ann_classes()) {
 689                         settings.beginGroup("ann_class" + QString::number(i));
 690                         settings.setValue("visible", ann_class->visible());
 691                         settings.endGroup();
 692                         i++;
 693                 }
 694
 695                 settings.endGroup();
 696         }
 697
 698         // Save channel mapping
 699         settings.setValue("channels", (int)channels_.size());
 700
 701         for (unsigned int channel_id = 0; channel_id < channels_.size(); channel_id++) {
 702                 auto channel = find_if(channels_.begin(), channels_.end(),
 703                         [&](decode::DecodeChannel ch) { return ch.id == channel_id; });
 704
 705                 if (channel == channels_.end()) {
 706                         qDebug() << "ERROR: Gap in channel index:" << channel_id;
 707                         continue;
 708                 }
 709
 710                 settings.beginGroup("channel" + QString::number(channel_id));
 711
 712                 settings.setValue("name", channel->name);  // Useful for debugging
 713                 settings.setValue("initial_pin_state", channel->initial_pin_state);
 714
 715                 if (channel->assigned_signal)
 716                         settings.setValue("assigned_signal_name", channel->assigned_signal->name());
 717
 718                 settings.endGroup();
 719         }
 720 }
 721
 722 void DecodeSignal::restore_settings(QSettings &settings)
 723 {
 724         SignalBase::restore_settings(settings);
 725
 726         // Restore decoder stack
 727         GSList *dec_list = g_slist_copy((GSList*)srd_decoder_list());
 728
 729         int decoders = settings.value("decoders").toInt();
 730
 731         for (int decoder_idx = 0; decoder_idx < decoders; decoder_idx++) {
 732                 settings.beginGroup("decoder" + QString::number(decoder_idx));
 733
 734                 QString id = settings.value("id").toString();
 735
 736                 for (GSList *entry = dec_list; entry; entry = entry->next) {
 737                         const srd_decoder *dec = (srd_decoder*)entry->data;
 738                         if (!dec)
 739                                 continue;
 740
 741                         if (QString::fromUtf8(dec->id) == id) {
 742                                 shared_ptr<Decoder> decoder = make_shared<Decoder>(dec, stack_.size());
 743
 744                                 connect(decoder.get(), SIGNAL(annotation_visibility_changed()),
 745                                         this, SLOT(on_annotation_visibility_changed()));
 746
 747                                 stack_.push_back(decoder);
 748                                 decoder->set_visible(settings.value("visible", true).toBool());
 749
 750                                 // Restore decoder options that differ from their default
 751                                 int options = settings.value("options").toInt();
 752
 753                                 for (int i = 0; i < options; i++) {
 754                                         settings.beginGroup("option" + QString::number(i));
 755                                         QString name = settings.value("name").toString();
 756                                         GVariant *value = GlobalSettings::restore_gvariant(settings);
 757                                         decoder->set_option(name.toUtf8(), value);
 758                                         settings.endGroup();
 759                                 }
 760
 761                                 // Include the newly created decode channels in the channel lists
 762                                 update_channel_list();
 763
 764                                 // Restore row properties
 765                                 int i = 0;
 766                                 for (Row* row : decoder->get_rows()) {
 767                                         settings.beginGroup("row" + QString::number(i));
 768                                         row->set_visible(settings.value("visible", true).toBool());
 769                                         settings.endGroup();
 770                                         i++;
 771                                 }
 772
 773                                 // Restore class properties
 774                                 i = 0;
 775                                 for (AnnotationClass* ann_class : decoder->ann_classes()) {
 776                                         settings.beginGroup("ann_class" + QString::number(i));
 777                                         ann_class->set_visible(settings.value("visible", true).toBool());
 778                                         settings.endGroup();
 779                                         i++;
 780                                 }
 781
 782                                 break;
 783                         }
 784                 }
 785
 786                 settings.endGroup();
 787                 channels_updated();
 788         }
 789
 790         // Restore channel mapping
 791         unsigned int channels = settings.value("channels").toInt();
 792
 793         const vector< shared_ptr<data::SignalBase> > signalbases =
 794                 session_.signalbases();
 795
 796         for (unsigned int channel_id = 0; channel_id < channels; channel_id++) {
 797                 auto channel = find_if(channels_.begin(), channels_.end(),
 798                         [&](decode::DecodeChannel ch) { return ch.id == channel_id; });
 799
 800                 if (channel == channels_.end()) {
 801                         qDebug() << "ERROR: Non-existant channel index:" << channel_id;
 802                         continue;
 803                 }
 804
 805                 settings.beginGroup("channel" + QString::number(channel_id));
 806
 807                 QString assigned_signal_name = settings.value("assigned_signal_name").toString();
 808
 809                 for (const shared_ptr<data::SignalBase>& signal : signalbases)
 810                         if ((signal->name() == assigned_signal_name) && (signal->type() != SignalBase::DecodeChannel))
 811                                 channel->assigned_signal = signal;
 812
 813                 channel->initial_pin_state = settings.value("initial_pin_state").toInt();
 814
 815                 settings.endGroup();
 816         }
 817
 818         // Update the internal structures
 819         stack_config_changed_ = true;
 820         update_channel_list();
 821         commit_decoder_channels();
 822
 823         begin_decode();
 824 }
 825
 826 bool DecodeSignal::all_input_segments_complete(uint32_t segment_id) const
 827 {
 828         bool all_complete = true;
 829
 830         for (const decode::DecodeChannel& ch : channels_)
 831                 if (ch.assigned_signal) {
 832                         if (!ch.assigned_signal->logic_data())
 833                                 continue;
 834
 835                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 836                         if (logic_data->logic_segments().empty())
 837                                 return false;
 838
 839                         if (segment_id >= logic_data->logic_segments().size())
 840                                 return false;
 841
 842                         const shared_ptr<const LogicSegment> segment = logic_data->logic_segments()[segment_id]->get_shared_ptr();
 843                         if (segment && !segment->is_complete())
 844                                 all_complete = false;
 845                 }
 846
 847         return all_complete;
 848 }
 849
 850 uint32_t DecodeSignal::get_input_segment_count() const
 851 {
 852         uint64_t count = std::numeric_limits<uint64_t>::max();
 853         bool no_signals_assigned = true;
 854
 855         for (const decode::DecodeChannel& ch : channels_)
 856                 if (ch.assigned_signal) {
 857                         no_signals_assigned = false;
 858
 859                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 860                         if (!logic_data || logic_data->logic_segments().empty())
 861                                 return 0;
 862
 863                         // Find the min value of all segment counts
 864                         if ((uint64_t)(logic_data->logic_segments().size()) < count)
 865                                 count = logic_data->logic_segments().size();
 866                 }
 867
 868         return (no_signals_assigned ? 0 : count);
 869 }
 870
 871 double DecodeSignal::get_input_samplerate(uint32_t segment_id) const
 872 {
 873         double samplerate = 0;
 874
 875         for (const decode::DecodeChannel& ch : channels_)
 876                 if (ch.assigned_signal) {
 877                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 878                         if (!logic_data || logic_data->logic_segments().empty())
 879                                 continue;
 880
 881                         try {
 882                                 const shared_ptr<const LogicSegment> segment =
 883                                         logic_data->logic_segments().at(segment_id)->get_shared_ptr();
 884                                 if (segment)
 885                                         samplerate = segment->samplerate();
 886                         } catch (out_of_range&) {
 887                                 // Do nothing
 888                         }
 889                         break;
 890                 }
 891
 892         return samplerate;
 893 }
 894
 895 Decoder* DecodeSignal::get_decoder_by_instance(const srd_decoder *const srd_dec)
 896 {
 897         for (shared_ptr<Decoder>& d : stack_)
 898                 if (d->get_srd_decoder() == srd_dec)
 899                         return d.get();
 900
 901         return nullptr;
 902 }
 903
 904 void DecodeSignal::update_channel_list()
 905 {
 906         vector<decode::DecodeChannel> prev_channels = channels_;
 907         channels_.clear();
 908
 909         uint16_t id = 0;
 910
 911         // Copy existing entries, create new as needed
 912         for (shared_ptr<Decoder>& decoder : stack_) {
 913                 const srd_decoder* srd_dec = decoder->get_srd_decoder();
 914                 const GSList *l;
 915
 916                 // Mandatory channels
 917                 for (l = srd_dec->channels; l; l = l->next) {
 918                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 919                         bool ch_added = false;
 920
 921                         // Copy but update ID if this channel was in the list before
 922                         for (decode::DecodeChannel& ch : prev_channels)
 923                                 if (ch.pdch_ == pdch) {
 924                                         ch.id = id++;
 925                                         channels_.push_back(ch);
 926                                         ch_added = true;
 927                                         break;
 928                                 }
 929
 930                         if (!ch_added) {
 931                                 // Create new entry without a mapped signal
 932                                 decode::DecodeChannel ch = {id++, 0, false, nullptr,
 933                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 934                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 935                                 channels_.push_back(ch);
 936                         }
 937                 }
 938
 939                 // Optional channels
 940                 for (l = srd_dec->opt_channels; l; l = l->next) {
 941                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 942                         bool ch_added = false;
 943
 944                         // Copy but update ID if this channel was in the list before
 945                         for (decode::DecodeChannel& ch : prev_channels)
 946                                 if (ch.pdch_ == pdch) {
 947                                         ch.id = id++;
 948                                         channels_.push_back(ch);
 949                                         ch_added = true;
 950                                         break;
 951                                 }
 952
 953                         if (!ch_added) {
 954                                 // Create new entry without a mapped signal
 955                                 decode::DecodeChannel ch = {id++, 0, true, nullptr,
 956                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 957                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 958                                 channels_.push_back(ch);
 959                         }
 960                 }
 961         }
 962
 963         // Invalidate the logic output data if the channel assignment changed
 964         if (prev_channels.size() != channels_.size()) {
 965                 // The number of channels changed, there's definitely a difference
 966                 logic_mux_data_invalid_ = true;
 967         } else {
 968                 // Same number but assignment may still differ, so compare all channels
 969                 for (size_t i = 0; i < channels_.size(); i++) {
 970                         const decode::DecodeChannel& p_ch = prev_channels[i];
 971                         const decode::DecodeChannel& ch = channels_[i];
 972
 973                         if ((p_ch.pdch_ != ch.pdch_) ||
 974                                 (p_ch.assigned_signal != ch.assigned_signal)) {
 975                                 logic_mux_data_invalid_ = true;
 976                                 break;
 977                         }
 978                 }
 979
 980         }
 981
 982         channels_updated();
 983 }
 984
 985 void DecodeSignal::commit_decoder_channels()
 986 {
 987         // Submit channel list to every decoder, containing only the relevant channels
 988         for (shared_ptr<Decoder> dec : stack_) {
 989                 vector<decode::DecodeChannel*> channel_list;
 990
 991                 for (decode::DecodeChannel& ch : channels_)
 992                         if (ch.decoder_ == dec)
 993                                 channel_list.push_back(&ch);
 994
 995                 dec->set_channels(channel_list);
 996         }
 997
 998         // Channel bit IDs must be in sync with the channel's apperance in channels_
 999         int id = 0;
1000         for (decode::DecodeChannel& ch : channels_)
1001                 if (ch.assigned_signal)
1002                         ch.bit_id = id++;
1003 }
1004
1005 void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, const int64_t end)
1006 {
1007         // Enforce end to be greater than start
1008         if (end <= start)
1009                 return;
1010
1011         // Fetch the channel segments and their data
1012         vector<shared_ptr<const LogicSegment> > segments;
1013         vector<const uint8_t*> signal_data;
1014         vector<uint8_t> signal_in_bytepos;
1015         vector<uint8_t> signal_in_bitpos;
1016
1017         for (decode::DecodeChannel& ch : channels_)
1018                 if (ch.assigned_signal) {
1019                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
1020
1021                         shared_ptr<const LogicSegment> segment;
1022                         if (segment_id < logic_data->logic_segments().size()) {
1023                                 segment = logic_data->logic_segments().at(segment_id)->get_shared_ptr();
1024                         } else {
1025                                 qDebug() << "Muxer error for" << name() << ":" << ch.assigned_signal->name() \
1026                                         << "has no logic segment" << segment_id;
1027                                 logic_mux_interrupt_ = true;
1028                                 return;
1029                         }
1030
1031                         if (!segment)
1032                                 return;
1033
1034                         segments.push_back(segment);
1035
1036                         uint8_t* data = new uint8_t[(end - start) * segment->unit_size()];
1037                         segment->get_samples(start, end, data);
1038                         signal_data.push_back(data);
1039
1040                         const int bitpos = ch.assigned_signal->logic_bit_index();
1041                         signal_in_bytepos.push_back(bitpos / 8);
1042                         signal_in_bitpos.push_back(bitpos % 8);
1043                 }
1044
1045         shared_ptr<LogicSegment> output_segment;
1046         try {
1047                 output_segment = logic_mux_data_->logic_segments().at(segment_id);
1048         } catch (out_of_range&) {
1049                 qDebug() << "Muxer error for" << name() << ": no logic mux segment" \
1050                         << segment_id << "in mux_logic_samples(), mux segments size is" \
1051                         << logic_mux_data_->logic_segments().size();
1052                 logic_mux_interrupt_ = true;
1053                 return;
1054         }
1055
1056         // Perform the muxing of signal data into the output data
1057         uint8_t* output = new uint8_t[(end - start) * output_segment->unit_size()];
1058         unsigned int signal_count = signal_data.size();
1059
1060         for (int64_t sample_cnt = 0; !logic_mux_interrupt_ && (sample_cnt < (end - start));
1061                 sample_cnt++) {
1062
1063                 int bitpos = 0;
1064                 uint8_t bytepos = 0;
1065
1066                 const int out_sample_pos = sample_cnt * output_segment->unit_size();
1067                 for (unsigned int i = 0; i < output_segment->unit_size(); i++)
1068                         output[out_sample_pos + i] = 0;
1069
1070                 for (unsigned int i = 0; i < signal_count; i++) {
1071                         const int in_sample_pos = sample_cnt * segments[i]->unit_size();
1072                         const uint8_t in_sample = 1 &
1073                                 ((signal_data[i][in_sample_pos + signal_in_bytepos[i]]) >> (signal_in_bitpos[i]));
1074
1075                         const uint8_t out_sample = output[out_sample_pos + bytepos];
1076
1077                         output[out_sample_pos + bytepos] = out_sample | (in_sample << bitpos);
1078
1079                         bitpos++;
1080                         if (bitpos > 7) {
1081                                 bitpos = 0;
1082                                 bytepos++;
1083                         }
1084                 }
1085         }
1086
1087         output_segment->append_payload(output, (end - start) * output_segment->unit_size());
1088         delete[] output;
1089
1090         for (const uint8_t* data : signal_data)
1091                 delete[] data;
1092 }
1093
1094 void DecodeSignal::logic_mux_proc()
1095 {
1096         uint32_t input_segment_count;
1097         do {
1098                 input_segment_count = get_input_segment_count();
1099                 if (input_segment_count == 0) {
1100                         // Wait for input data
1101                         unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
1102                         logic_mux_cond_.wait(logic_mux_lock);
1103                 }
1104         } while ((!logic_mux_interrupt_) && (input_segment_count == 0));
1105
1106         if (logic_mux_interrupt_)
1107                 return;
1108
1109         assert(logic_mux_data_);
1110
1111         uint32_t segment_id = 0;
1112
1113         // Create initial logic mux segment
1114         shared_ptr<LogicSegment> output_segment =
1115                 make_shared<LogicSegment>(*logic_mux_data_, segment_id, logic_mux_unit_size_, 0);
1116         logic_mux_data_->push_segment(output_segment);
1117
1118         output_segment->set_samplerate(get_input_samplerate(0));
1119
1120         // Logic mux data is being updated
1121         logic_mux_data_invalid_ = false;
1122
1123         uint64_t samples_to_process;
1124         do {
1125                 do {
1126                         const uint64_t input_sample_count = get_working_sample_count(segment_id);
1127                         const uint64_t output_sample_count = output_segment->get_sample_count();
1128
1129                         samples_to_process =
1130                                 (input_sample_count > output_sample_count) ?
1131                                 (input_sample_count - output_sample_count) : 0;
1132
1133                         if (samples_to_process > 0) {
1134                                 const uint64_t unit_size = output_segment->unit_size();
1135                                 const uint64_t chunk_sample_count = DecodeChunkLength / unit_size;
1136
1137                                 uint64_t processed_samples = 0;
1138                                 do {
1139                                         const uint64_t start_sample = output_sample_count + processed_samples;
1140                                         const uint64_t sample_count =
1141                                                 min(samples_to_process - processed_samples,     chunk_sample_count);
1142
1143                                         mux_logic_samples(segment_id, start_sample, start_sample + sample_count);
1144                                         processed_samples += sample_count;
1145
1146                                         // ...and process the newly muxed logic data
1147                                         decode_input_cond_.notify_one();
1148                                 } while (!logic_mux_interrupt_ && (processed_samples < samples_to_process));
1149                         }
1150                 } while (!logic_mux_interrupt_ && (samples_to_process > 0));
1151
1152                 if (!logic_mux_interrupt_) {
1153                         // samples_to_process is now 0, we've exhausted the currently available input data
1154
1155                         // If the input segments are complete, we've completed this segment
1156                         if (all_input_segments_complete(segment_id)) {
1157                                 if (!output_segment->is_complete())
1158                                         output_segment->set_complete();
1159
1160                                 if (segment_id < get_input_segment_count() - 1) {
1161                                         // Process next segment
1162                                         segment_id++;
1163
1164                                         output_segment =
1165                                                 make_shared<LogicSegment>(*logic_mux_data_, segment_id,
1166                                                         logic_mux_unit_size_, 0);
1167                                         logic_mux_data_->push_segment(output_segment);
1168
1169                                         output_segment->set_samplerate(get_input_samplerate(segment_id));
1170                                 }
1171                         }
1172
1173                         if (segment_id == (get_input_segment_count() - 1)) {
1174                                 // Wait for more input data if we're processing the currently last segment
1175                                 unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
1176                                 logic_mux_cond_.wait(logic_mux_lock);
1177                         }
1178                 }
1179         } while (!logic_mux_interrupt_);
1180 }
1181
1182 void DecodeSignal::decode_data(
1183         const int64_t abs_start_samplenum, const int64_t sample_count,
1184         const shared_ptr<const LogicSegment> input_segment)
1185 {
1186         const int64_t unit_size = input_segment->unit_size();
1187         const int64_t chunk_sample_count = DecodeChunkLength / unit_size;
1188
1189         for (int64_t i = abs_start_samplenum;
1190                 !decode_interrupt_ && (i < (abs_start_samplenum + sample_count));
1191                 i += chunk_sample_count) {
1192
1193                 const int64_t chunk_end = min(i + chunk_sample_count,
1194                         abs_start_samplenum + sample_count);
1195
1196                 {
1197                         lock_guard<mutex> lock(output_mutex_);
1198                         // Update the sample count showing the samples including currently processed ones
1199                         segments_.at(current_segment_id_).samples_decoded_incl = chunk_end;
1200                 }
1201
1202                 int64_t data_size = (chunk_end - i) * unit_size;
1203                 uint8_t* chunk = new uint8_t[data_size];
1204                 input_segment->get_samples(i, chunk_end, chunk);
1205
1206                 if (srd_session_send(srd_session_, i, chunk_end, chunk,
1207                                 data_size, unit_size) != SRD_OK) {
1208                         set_error_message(tr("Decoder reported an error"));
1209                         decode_interrupt_ = true;
1210                 }
1211
1212                 delete[] chunk;
1213
1214                 {
1215                         lock_guard<mutex> lock(output_mutex_);
1216                         // Now that all samples are processed, the exclusive sample count catches up
1217                         segments_.at(current_segment_id_).samples_decoded_excl = chunk_end;
1218                 }
1219
1220                 // Notify the frontend that we processed some data and
1221                 // possibly have new annotations as well
1222                 new_annotations();
1223
1224                 if (decode_paused_) {
1225                         unique_lock<mutex> pause_wait_lock(decode_pause_mutex_);
1226                         decode_pause_cond_.wait(pause_wait_lock);
1227                 }
1228         }
1229 }
1230
1231 void DecodeSignal::decode_proc()
1232 {
1233         current_segment_id_ = 0;
1234
1235         // If there is no input data available yet, wait until it is or we're interrupted
1236         do {
1237                 if (logic_mux_data_->logic_segments().size() == 0) {
1238                         // Wait for input data
1239                         unique_lock<mutex> input_wait_lock(input_mutex_);
1240                         decode_input_cond_.wait(input_wait_lock);
1241                 }
1242         } while ((!decode_interrupt_) && (logic_mux_data_->logic_segments().size() == 0));
1243
1244         if (decode_interrupt_)
1245                 return;
1246
1247         shared_ptr<const LogicSegment> input_segment = logic_mux_data_->logic_segments().front()->get_shared_ptr();
1248         if (!input_segment)
1249                 return;
1250
1251         // Create the initial segment and set its sample rate so that we can pass it to SRD
1252         create_decode_segment();
1253         segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
1254         segments_.at(current_segment_id_).start_time = input_segment->start_time();
1255
1256         start_srd_session();
1257
1258         uint64_t samples_to_process = 0;
1259         uint64_t abs_start_samplenum = 0;
1260         do {
1261                 // Keep processing new samples until we exhaust the input data
1262                 do {
1263                         samples_to_process = input_segment->get_sample_count() - abs_start_samplenum;
1264
1265                         if (samples_to_process > 0) {
1266                                 decode_data(abs_start_samplenum, samples_to_process, input_segment);
1267                                 abs_start_samplenum += samples_to_process;
1268                         }
1269                 } while (!decode_interrupt_ && (samples_to_process > 0));
1270
1271                 if (!decode_interrupt_) {
1272                         // samples_to_process is now 0, we've exhausted the currently available input data
1273
1274                         // If the input segment is complete, we've exhausted this segment
1275                         if (input_segment->is_complete()) {
1276                                 if (current_segment_id_ < (logic_mux_data_->logic_segments().size() - 1)) {
1277                                         // Process next segment
1278                                         current_segment_id_++;
1279
1280                                         try {
1281                                                 input_segment = logic_mux_data_->logic_segments().at(current_segment_id_);
1282                                         } catch (out_of_range&) {
1283                                                 qDebug() << "Decode error for" << name() << ": no logic mux segment" \
1284                                                         << current_segment_id_ << "in decode_proc(), mux segments size is" \
1285                                                         << logic_mux_data_->logic_segments().size();
1286                                                 decode_interrupt_ = true;
1287                                                 return;
1288                                         }
1289                                         abs_start_samplenum = 0;
1290
1291                                         // Create the next segment and set its metadata
1292                                         create_decode_segment();
1293                                         segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
1294                                         segments_.at(current_segment_id_).start_time = input_segment->start_time();
1295
1296                                         // Reset decoder state but keep the decoder stack intact
1297                                         terminate_srd_session();
1298                                 } else {
1299                                         // All segments have been processed
1300                                         if (!decode_interrupt_)
1301                                                 decode_finished();
1302                                 }
1303                         }
1304
1305                         if (current_segment_id_ == (logic_mux_data_->logic_segments().size() - 1)) {
1306                                 // Wait for more input data if we're processing the currently last segment
1307                                 unique_lock<mutex> input_wait_lock(input_mutex_);
1308                                 decode_input_cond_.wait(input_wait_lock);
1309                         }
1310                 }
1311         } while (!decode_interrupt_);
1312 }
1313
1314 void DecodeSignal::start_srd_session()
1315 {
1316         // If there were stack changes, the session has been destroyed by now, so if
1317         // it hasn't been destroyed, we can just reset and re-use it
1318         if (srd_session_) {
1319                 // When a decoder stack was created before, re-use it
1320                 // for the next stream of input data, after terminating
1321                 // potentially still executing operations, and resetting
1322                 // internal state. Skip the rather expensive (teardown
1323                 // and) construction of another decoder stack.
1324
1325                 // TODO Reduce redundancy, use a common code path for
1326                 // the meta/start sequence?
1327                 terminate_srd_session();
1328
1329                 // Metadata is cleared also, so re-set it
1330                 uint64_t samplerate = 0;
1331                 if (segments_.size() > 0)
1332                         samplerate = segments_.at(current_segment_id_).samplerate;
1333                 if (samplerate)
1334                         srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1335                                 g_variant_new_uint64(samplerate));
1336                 for (const shared_ptr<Decoder>& dec : stack_)
1337                         dec->apply_all_options();
1338                 srd_session_start(srd_session_);
1339
1340                 return;
1341         }
1342
1343         // Create the session
1344         srd_session_new(&srd_session_);
1345         assert(srd_session_);
1346
1347         // Create the decoders
1348         srd_decoder_inst *prev_di = nullptr;
1349         for (const shared_ptr<Decoder>& dec : stack_) {
1350                 srd_decoder_inst *const di = dec->create_decoder_inst(srd_session_);
1351
1352                 if (!di) {
1353                         set_error_message(tr("Failed to create decoder instance"));
1354                         srd_session_destroy(srd_session_);
1355                         srd_session_ = nullptr;
1356                         return;
1357                 }
1358
1359                 if (prev_di)
1360                         srd_inst_stack(srd_session_, prev_di, di);
1361
1362                 prev_di = di;
1363         }
1364
1365         // Start the session
1366         if (segments_.size() > 0)
1367                 srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1368                         g_variant_new_uint64(segments_.at(current_segment_id_).samplerate));
1369
1370         srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_ANN,
1371                 DecodeSignal::annotation_callback, this);
1372
1373         srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_BINARY,
1374                 DecodeSignal::binary_callback, this);
1375
1376         srd_session_start(srd_session_);
1377
1378         // We just recreated the srd session, so all stack changes are applied now
1379         stack_config_changed_ = false;
1380 }
1381
1382 void DecodeSignal::terminate_srd_session()
1383 {
1384         // Call the "terminate and reset" routine for the decoder stack
1385         // (if available). This does not harm those stacks which already
1386         // have completed their operation, and reduces response time for
1387         // those stacks which still are processing data while the
1388         // application no longer wants them to.
1389         if (srd_session_) {
1390                 srd_session_terminate_reset(srd_session_);
1391
1392                 // Metadata is cleared also, so re-set it
1393                 uint64_t samplerate = 0;
1394                 if (segments_.size() > 0)
1395                         samplerate = segments_.at(current_segment_id_).samplerate;
1396                 if (samplerate)
1397                         srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE,
1398                                 g_variant_new_uint64(samplerate));
1399                 for (const shared_ptr<Decoder>& dec : stack_)
1400                         dec->apply_all_options();
1401         }
1402 }
1403
1404 void DecodeSignal::stop_srd_session()
1405 {
1406         if (srd_session_) {
1407                 // Destroy the session
1408                 srd_session_destroy(srd_session_);
1409                 srd_session_ = nullptr;
1410
1411                 // Mark the decoder instances as non-existant since they were deleted
1412                 for (const shared_ptr<Decoder>& dec : stack_)
1413                         dec->invalidate_decoder_inst();
1414         }
1415 }
1416
1417 void DecodeSignal::connect_input_notifiers()
1418 {
1419         // Disconnect the notification slot from the previous set of signals
1420         disconnect(this, SLOT(on_data_cleared()));
1421         disconnect(this, SLOT(on_data_received()));
1422
1423         // Connect the currently used signals to our slot
1424         for (decode::DecodeChannel& ch : channels_) {
1425                 if (!ch.assigned_signal)
1426                         continue;
1427
1428                 const data::SignalBase *signal = ch.assigned_signal.get();
1429                 connect(signal, &data::SignalBase::samples_cleared,
1430                         this, &DecodeSignal::on_data_cleared);
1431                 connect(signal, &data::SignalBase::samples_added,
1432                         this, &DecodeSignal::on_data_received);
1433         }
1434 }
1435
1436 void DecodeSignal::create_decode_segment()
1437 {
1438         // Create annotation segment
1439         segments_.emplace_back();
1440
1441         // Add annotation classes
1442         for (const shared_ptr<Decoder>& dec : stack_)
1443                 for (Row* row : dec->get_rows())
1444                         segments_.back().annotation_rows.emplace(row, RowData(row));
1445
1446         // Prepare our binary output classes
1447         for (const shared_ptr<Decoder>& dec : stack_) {
1448                 uint32_t n = dec->get_binary_class_count();
1449
1450                 for (uint32_t i = 0; i < n; i++)
1451                         segments_.back().binary_classes.push_back(
1452                                 {dec.get(), dec->get_binary_class(i), deque<DecodeBinaryDataChunk>()});
1453         }
1454 }
1455
1456 void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signal)
1457 {
1458         assert(pdata);
1459         assert(decode_signal);
1460
1461         DecodeSignal *const ds = (DecodeSignal*)decode_signal;
1462         assert(ds);
1463
1464         if (ds->decode_interrupt_)
1465                 return;
1466
1467         if (ds->segments_.empty())
1468                 return;
1469
1470         lock_guard<mutex> lock(ds->output_mutex_);
1471
1472         // Get the decoder and the annotation data
1473         assert(pdata->pdo);
1474         assert(pdata->pdo->di);
1475         const srd_decoder *const srd_dec = pdata->pdo->di->decoder;
1476         assert(srd_dec);
1477
1478         const srd_proto_data_annotation *const pda = (const srd_proto_data_annotation*)pdata->data;
1479         assert(pda);
1480
1481         // Find the row
1482         Decoder* dec = ds->get_decoder_by_instance(srd_dec);
1483         assert(dec);
1484
1485         AnnotationClass* ann_class = dec->get_ann_class_by_id(pda->ann_class);
1486         if (!ann_class) {
1487                 qWarning() << "Decoder" << ds->display_name() << "wanted to add annotation" <<
1488                         "with class ID" << pda->ann_class << "but there are only" <<
1489                         dec->ann_classes().size() << "known classes";
1490                 return;
1491         }
1492
1493         const Row* row = ann_class->row;
1494
1495         if (!row)
1496                 row = dec->get_row_by_id(0);
1497
1498         RowData& row_data = ds->segments_[ds->current_segment_id_].annotation_rows.at(row);
1499
1500         // Add the annotation to the row
1501         const Annotation* ann = row_data.emplace_annotation(pdata);
1502
1503         // We insert the annotation into the global annotation list in a way so that
1504         // the annotation list is sorted by start sample and length. Otherwise, we'd
1505         // have to sort the model, which is expensive
1506         deque<const Annotation*>& all_annotations =
1507                 ds->segments_[ds->current_segment_id_].all_annotations;
1508
1509         if (all_annotations.empty()) {
1510                 all_annotations.emplace_back(ann);
1511         } else {
1512                 const uint64_t new_ann_len = (pdata->end_sample - pdata->start_sample);
1513                 bool ann_has_earlier_start = (pdata->start_sample < all_annotations.back()->start_sample());
1514                 bool ann_is_longer = (new_ann_len >
1515                         (all_annotations.back()->end_sample() - all_annotations.back()->start_sample()));
1516
1517                 if (ann_has_earlier_start && ann_is_longer) {
1518                         bool ann_has_same_start;
1519                         auto it = all_annotations.end();
1520
1521                         do {
1522                                 it--;
1523                                 ann_has_earlier_start = (pdata->start_sample < (*it)->start_sample());
1524                                 ann_has_same_start = (pdata->start_sample == (*it)->start_sample());
1525                                 ann_is_longer = (new_ann_len > (*it)->length());
1526                         } while ((ann_has_earlier_start || (ann_has_same_start && ann_is_longer)) && (it != all_annotations.begin()));
1527
1528                         // Allow inserting at the front
1529                         if (it != all_annotations.begin())
1530                                 it++;
1531
1532                         all_annotations.emplace(it, ann);
1533                 } else
1534                         all_annotations.emplace_back(ann);
1535         }
1536
1537         // When emplace_annotation() inserts instead of appends an annotation,
1538         // the pointers in all_annotations that follow the inserted annotation and
1539         // point to annotations for this row are off by one and must be updated
1540         if (&(row_data.annotations().back()) != ann) {
1541                 // Search backwards until we find the annotation we just added
1542                 auto row_it = row_data.annotations().end();
1543                 auto all_it = all_annotations.end();
1544                 do {
1545                         all_it--;
1546                         if ((*all_it)->row_data() == &row_data)
1547                                 row_it--;
1548                 } while (&(*row_it) != ann);
1549
1550                 // Update the annotation addresses for this row's annotations until the end
1551                 do {
1552                         if ((*all_it)->row_data() == &row_data) {
1553                                 *all_it = &(*row_it);
1554                                 row_it++;
1555                         }
1556                         all_it++;
1557                 } while (all_it != all_annotations.end());
1558         }
1559 }
1560
1561 void DecodeSignal::binary_callback(srd_proto_data *pdata, void *decode_signal)
1562 {
1563         assert(pdata);
1564         assert(decode_signal);
1565
1566         DecodeSignal *const ds = (DecodeSignal*)decode_signal;
1567         assert(ds);
1568
1569         if (ds->decode_interrupt_)
1570                 return;
1571
1572         // Get the decoder and the binary data
1573         assert(pdata->pdo);
1574         assert(pdata->pdo->di);
1575         const srd_decoder *const srd_dec = pdata->pdo->di->decoder;
1576         assert(srd_dec);
1577
1578         const srd_proto_data_binary *const pdb = (const srd_proto_data_binary*)pdata->data;
1579         assert(pdb);
1580
1581         // Find the matching DecodeBinaryClass
1582         DecodeSegment* segment = &(ds->segments_.at(ds->current_segment_id_));
1583
1584         DecodeBinaryClass* bin_class = nullptr;
1585         for (DecodeBinaryClass& bc : segment->binary_classes)
1586                 if ((bc.decoder->get_srd_decoder() == srd_dec) &&
1587                         (bc.info->bin_class_id == (uint32_t)pdb->bin_class))
1588                         bin_class = &bc;
1589
1590         if (!bin_class) {
1591                 qWarning() << "Could not find valid DecodeBinaryClass in segment" <<
1592                                 ds->current_segment_id_ << "for binary class ID" << pdb->bin_class <<
1593                                 ", segment only knows" << segment->binary_classes.size() << "classes";
1594                 return;
1595         }
1596
1597         // Add the data chunk
1598         bin_class->chunks.emplace_back();
1599         DecodeBinaryDataChunk* chunk = &(bin_class->chunks.back());
1600
1601         chunk->sample = pdata->start_sample;
1602         chunk->data.resize(pdb->size);
1603         memcpy(chunk->data.data(), pdb->data, pdb->size);
1604
1605         Decoder* dec = ds->get_decoder_by_instance(srd_dec);
1606
1607         ds->new_binary_data(ds->current_segment_id_, (void*)dec, pdb->bin_class);
1608 }
1609
1610 void DecodeSignal::on_capture_state_changed(int state)
1611 {
1612         // If a new acquisition was started, we need to start decoding from scratch
1613         if (state == Session::Running) {
1614                 logic_mux_data_invalid_ = true;
1615                 begin_decode();
1616         }
1617 }
1618
1619 void DecodeSignal::on_data_cleared()
1620 {
1621         reset_decode();
1622 }
1623
1624 void DecodeSignal::on_data_received()
1625 {
1626         // If we detected a lack of input data when trying to start decoding,
1627         // we have set an error message. Only try again if we now have data
1628         // to work with
1629         if ((!error_message_.isEmpty()) && (get_input_segment_count() == 0))
1630                 return;
1631         else {
1632                 error_message_.clear();
1633                 // TODO Emulate noquote()
1634                 qDebug().nospace() << name() << ": Error cleared";
1635         }
1636
1637         if (!logic_mux_thread_.joinable())
1638                 begin_decode();
1639         else
1640                 logic_mux_cond_.notify_one();
1641 }
1642
1643 void DecodeSignal::on_annotation_visibility_changed()
1644 {
1645         annotation_visibility_changed();
1646 }
1647
1648 } // namespace data
1649 } // namespace pv