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 <limits>
  21
  22 #include <QDebug>
  23
  24 #include "logic.hpp"
  25 #include "logicsegment.hpp"
  26 #include "decodesignal.hpp"
  27 #include "signaldata.hpp"
  28
  29 #include <pv/binding/decoder.hpp>
  30 #include <pv/data/decode/decoder.hpp>
  31 #include <pv/data/decode/row.hpp>
  32 #include <pv/session.hpp>
  33
  34 using std::lock_guard;
  35 using std::make_pair;
  36 using std::make_shared;
  37 using std::min;
  38 using std::shared_ptr;
  39 using std::unique_lock;
  40 using pv::data::decode::Annotation;
  41 using pv::data::decode::Decoder;
  42 using pv::data::decode::Row;
  43
  44 namespace pv {
  45 namespace data {
  46
  47 const double DecodeSignal::DecodeMargin = 1.0;
  48 const double DecodeSignal::DecodeThreshold = 0.2;
  49 const int64_t DecodeSignal::DecodeChunkLength = 10 * 1024 * 1024;
  50 const unsigned int DecodeSignal::DecodeNotifyPeriod = 1024;
  51
  52 mutex DecodeSignal::global_srd_mutex_;
  53
  54
  55 DecodeSignal::DecodeSignal(pv::Session &session) :
  56         SignalBase(nullptr, SignalBase::DecodeChannel),
  57         session_(session),
  58         logic_mux_data_invalid_(false),
  59         start_time_(0),
  60         samplerate_(0),
  61         annotation_count_(0),
  62         samples_decoded_(0),
  63         frame_complete_(false)
  64 {
  65         connect(&session_, SIGNAL(capture_state_changed(int)),
  66                 this, SLOT(on_capture_state_changed(int)));
  67         connect(&session_, SIGNAL(data_received()),
  68                 this, SLOT(on_data_received()));
  69         connect(&session_, SIGNAL(frame_ended()),
  70                 this, SLOT(on_frame_ended()));
  71
  72         set_name(tr("Empty decoder signal"));
  73 }
  74
  75 DecodeSignal::~DecodeSignal()
  76 {
  77         if (decode_thread_.joinable()) {
  78                 decode_interrupt_ = true;
  79                 decode_input_cond_.notify_one();
  80                 decode_thread_.join();
  81         }
  82
  83         if (logic_mux_thread_.joinable()) {
  84                 logic_mux_interrupt_ = true;
  85                 logic_mux_cond_.notify_one();
  86                 logic_mux_thread_.join();
  87         }
  88 }
  89
  90 const vector< shared_ptr<Decoder> >& DecodeSignal::decoder_stack() const
  91 {
  92         return stack_;
  93 }
  94
  95 void DecodeSignal::stack_decoder(srd_decoder *decoder)
  96 {
  97         assert(decoder);
  98         stack_.push_back(make_shared<decode::Decoder>(decoder));
  99
 100         // Set name if this decoder is the first in the list
 101         if (stack_.size() == 1)
 102                 set_name(QString::fromUtf8(decoder->name));
 103
 104         // Include the newly created decode channels in the channel lists
 105         update_channel_list();
 106
 107         auto_assign_signals();
 108         commit_decoder_channels();
 109         begin_decode();
 110 }
 111
 112 void DecodeSignal::remove_decoder(int index)
 113 {
 114         assert(index >= 0);
 115         assert(index < (int)stack_.size());
 116
 117         // Find the decoder in the stack
 118         auto iter = stack_.begin();
 119         for (int i = 0; i < index; i++, iter++)
 120                 assert(iter != stack_.end());
 121
 122         // Delete the element
 123         stack_.erase(iter);
 124
 125         // Update channels and decoded data
 126         update_channel_list();
 127         begin_decode();
 128 }
 129
 130 bool DecodeSignal::toggle_decoder_visibility(int index)
 131 {
 132         auto iter = stack_.cbegin();
 133         for (int i = 0; i < index; i++, iter++)
 134                 assert(iter != stack_.end());
 135
 136         shared_ptr<Decoder> dec = *iter;
 137
 138         // Toggle decoder visibility
 139         bool state = false;
 140         if (dec) {
 141                 state = !dec->shown();
 142                 dec->show(state);
 143         }
 144
 145         return state;
 146 }
 147
 148 void DecodeSignal::reset_decode()
 149 {
 150         annotation_count_ = 0;
 151         frame_complete_ = false;
 152         samples_decoded_ = 0;
 153         error_message_ = QString();
 154         rows_.clear();
 155         class_rows_.clear();
 156 }
 157
 158 void DecodeSignal::begin_decode()
 159 {
 160         if (decode_thread_.joinable()) {
 161                 decode_interrupt_ = true;
 162                 decode_input_cond_.notify_one();
 163                 decode_thread_.join();
 164         }
 165
 166         if (logic_mux_thread_.joinable()) {
 167                 logic_mux_interrupt_ = true;
 168                 logic_mux_cond_.notify_one();
 169                 logic_mux_thread_.join();
 170         }
 171
 172         reset_decode();
 173
 174         if (stack_.size() == 0) {
 175                 error_message_ = tr("No decoders");
 176                 return;
 177         }
 178
 179         assert(channels_.size() > 0);
 180
 181         if (get_assigned_signal_count() == 0) {
 182                 error_message_ = tr("There are no channels assigned to this decoder");
 183                 return;
 184         }
 185
 186         // Check that all decoders have the required channels
 187         for (const shared_ptr<decode::Decoder> &dec : stack_)
 188                 if (!dec->have_required_channels()) {
 189                         error_message_ = tr("One or more required channels "
 190                                 "have not been specified");
 191                         return;
 192                 }
 193
 194         // Add annotation classes
 195         for (const shared_ptr<decode::Decoder> &dec : stack_) {
 196                 assert(dec);
 197                 const srd_decoder *const decc = dec->decoder();
 198                 assert(dec->decoder());
 199
 200                 // Add a row for the decoder if it doesn't have a row list
 201                 if (!decc->annotation_rows)
 202                         rows_[Row(decc)] = decode::RowData();
 203
 204                 // Add the decoder rows
 205                 for (const GSList *l = decc->annotation_rows; l; l = l->next) {
 206                         const srd_decoder_annotation_row *const ann_row =
 207                                 (srd_decoder_annotation_row *)l->data;
 208                         assert(ann_row);
 209
 210                         const Row row(decc, ann_row);
 211
 212                         // Add a new empty row data object
 213                         rows_[row] = decode::RowData();
 214
 215                         // Map out all the classes
 216                         for (const GSList *ll = ann_row->ann_classes;
 217                                 ll; ll = ll->next)
 218                                 class_rows_[make_pair(decc,
 219                                         GPOINTER_TO_INT(ll->data))] = row;
 220                 }
 221         }
 222
 223         // TODO Currently we assume all channels have the same sample rate
 224         auto any_channel = find_if(channels_.begin(), channels_.end(),
 225                 [](data::DecodeChannel ch) { return ch.assigned_signal; });
 226         shared_ptr<LogicSegment> first_segment =
 227                         any_channel->assigned_signal->logic_data()->logic_segments().front();
 228         samplerate_ = first_segment->samplerate();
 229
 230         // Free the logic data and its segment(s) if it needs to be updated
 231         if (logic_mux_data_invalid_)
 232                 logic_mux_data_.reset();
 233
 234         if (!logic_mux_data_) {
 235                 const int64_t ch_count = get_assigned_signal_count();
 236                 const int64_t unit_size = (ch_count + 7) / 8;
 237                 logic_mux_data_ = make_shared<Logic>(ch_count);
 238                 segment_ = make_shared<LogicSegment>(*logic_mux_data_, unit_size, samplerate_);
 239                 logic_mux_data_->push_segment(segment_);
 240         }
 241
 242         // Update the samplerate and start time
 243         start_time_ = segment_->start_time();
 244         samplerate_ = segment_->samplerate();
 245         if (samplerate_ == 0.0)
 246                 samplerate_ = 1.0;
 247
 248         // Make sure the logic output data is complete and up-to-date
 249         logic_mux_interrupt_ = false;
 250         logic_mux_thread_ = std::thread(&DecodeSignal::logic_mux_proc, this);
 251
 252         // Decode the muxed logic data
 253         decode_interrupt_ = false;
 254         decode_thread_ = std::thread(&DecodeSignal::decode_proc, this);
 255 }
 256
 257 QString DecodeSignal::error_message() const
 258 {
 259         lock_guard<mutex> lock(output_mutex_);
 260         return error_message_;
 261 }
 262
 263 const vector<data::DecodeChannel> DecodeSignal::get_channels() const
 264 {
 265         return channels_;
 266 }
 267
 268 void DecodeSignal::auto_assign_signals()
 269 {
 270         bool new_assignment = false;
 271
 272         // Try to auto-select channels that don't have signals assigned yet
 273         for (data::DecodeChannel &ch : channels_) {
 274                 if (ch.assigned_signal)
 275                         continue;
 276
 277                 for (shared_ptr<data::SignalBase> s : session_.signalbases())
 278                         if (s->logic_data() && (ch.name.toLower().contains(s->name().toLower()))) {
 279                                 ch.assigned_signal = s.get();
 280                                 new_assignment = true;
 281                         }
 282         }
 283
 284         if (new_assignment) {
 285                 logic_mux_data_invalid_ = true;
 286                 commit_decoder_channels();
 287                 channels_updated();
 288         }
 289 }
 290
 291 void DecodeSignal::assign_signal(const uint16_t channel_id, const SignalBase *signal)
 292 {
 293         for (data::DecodeChannel &ch : channels_)
 294                 if (ch.id == channel_id) {
 295                         ch.assigned_signal = signal;
 296                         logic_mux_data_invalid_ = true;
 297                 }
 298
 299         commit_decoder_channels();
 300         channels_updated();
 301         begin_decode();
 302 }
 303
 304 int DecodeSignal::get_assigned_signal_count() const
 305 {
 306         // Count all channels that have a signal assigned to them
 307         return count_if(channels_.begin(), channels_.end(),
 308                 [](data::DecodeChannel ch) { return ch.assigned_signal; });
 309 }
 310
 311 void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state)
 312 {
 313         for (data::DecodeChannel &ch : channels_)
 314                 if (ch.id == channel_id)
 315                         ch.initial_pin_state = init_state;
 316
 317         channels_updated();
 318
 319         begin_decode();
 320 }
 321
 322 double DecodeSignal::samplerate() const
 323 {
 324         return samplerate_;
 325 }
 326
 327 const pv::util::Timestamp& DecodeSignal::start_time() const
 328 {
 329         return start_time_;
 330 }
 331
 332 int64_t DecodeSignal::get_working_sample_count() const
 333 {
 334         // The working sample count is the highest sample number for
 335         // which all used signals have data available, so go through
 336         // all channels and use the lowest overall sample count of the
 337         // current segment
 338
 339         // TODO Currently, we assume only a single segment exists
 340
 341         int64_t count = std::numeric_limits<int64_t>::max();
 342         bool no_signals_assigned = true;
 343
 344         for (const data::DecodeChannel &ch : channels_)
 345                 if (ch.assigned_signal) {
 346                         no_signals_assigned = false;
 347
 348                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 349                         if (!logic_data || logic_data->logic_segments().empty())
 350                                 return 0;
 351
 352                         const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front();
 353                         count = min(count, (int64_t)segment->get_sample_count());
 354                 }
 355
 356         return (no_signals_assigned ? 0 : count);
 357 }
 358
 359 int64_t DecodeSignal::get_decoded_sample_count() const
 360 {
 361         lock_guard<mutex> decode_lock(output_mutex_);
 362         return samples_decoded_;
 363 }
 364
 365 vector<Row> DecodeSignal::visible_rows() const
 366 {
 367         lock_guard<mutex> lock(output_mutex_);
 368
 369         vector<Row> rows;
 370
 371         for (const shared_ptr<decode::Decoder> &dec : stack_) {
 372                 assert(dec);
 373                 if (!dec->shown())
 374                         continue;
 375
 376                 const srd_decoder *const decc = dec->decoder();
 377                 assert(dec->decoder());
 378
 379                 // Add a row for the decoder if it doesn't have a row list
 380                 if (!decc->annotation_rows)
 381                         rows.emplace_back(decc);
 382
 383                 // Add the decoder rows
 384                 for (const GSList *l = decc->annotation_rows; l; l = l->next) {
 385                         const srd_decoder_annotation_row *const ann_row =
 386                                 (srd_decoder_annotation_row *)l->data;
 387                         assert(ann_row);
 388                         rows.emplace_back(decc, ann_row);
 389                 }
 390         }
 391
 392         return rows;
 393 }
 394
 395 void DecodeSignal::get_annotation_subset(
 396         vector<pv::data::decode::Annotation> &dest,
 397         const decode::Row &row, uint64_t start_sample,
 398         uint64_t end_sample) const
 399 {
 400         lock_guard<mutex> lock(output_mutex_);
 401
 402         const auto iter = rows_.find(row);
 403         if (iter != rows_.end())
 404                 (*iter).second.get_annotation_subset(dest,
 405                         start_sample, end_sample);
 406 }
 407
 408 void DecodeSignal::save_settings(QSettings &settings) const
 409 {
 410         SignalBase::save_settings(settings);
 411
 412         // TODO Save decoder stack, channel mapping and decoder options
 413 }
 414
 415 void DecodeSignal::restore_settings(QSettings &settings)
 416 {
 417         SignalBase::restore_settings(settings);
 418
 419         // TODO Restore decoder stack, channel mapping and decoder options
 420 }
 421
 422 uint64_t DecodeSignal::inc_annotation_count()
 423 {
 424         return (annotation_count_++);
 425 }
 426
 427 void DecodeSignal::update_channel_list()
 428 {
 429         vector<data::DecodeChannel> prev_channels = channels_;
 430         channels_.clear();
 431
 432         uint16_t id = 0;
 433
 434         // Copy existing entries, create new as needed
 435         for (shared_ptr<Decoder> decoder : stack_) {
 436                 const srd_decoder* srd_d = decoder->decoder();
 437                 const GSList *l;
 438
 439                 // Mandatory channels
 440                 for (l = srd_d->channels; l; l = l->next) {
 441                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 442                         bool ch_added = false;
 443
 444                         // Copy but update ID if this channel was in the list before
 445                         for (data::DecodeChannel &ch : prev_channels)
 446                                 if (ch.pdch_ == pdch) {
 447                                         ch.id = id++;
 448                                         channels_.push_back(ch);
 449                                         ch_added = true;
 450                                         break;
 451                                 }
 452
 453                         if (!ch_added) {
 454                                 // Create new entry without a mapped signal
 455                                 data::DecodeChannel ch = {id++, false, nullptr,
 456                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 457                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 458                                 channels_.push_back(ch);
 459                         }
 460                 }
 461
 462                 // Optional channels
 463                 for (l = srd_d->opt_channels; l; l = l->next) {
 464                         const struct srd_channel *const pdch = (struct srd_channel *)l->data;
 465                         bool ch_added = false;
 466
 467                         // Copy but update ID if this channel was in the list before
 468                         for (data::DecodeChannel &ch : prev_channels)
 469                                 if (ch.pdch_ == pdch) {
 470                                         ch.id = id++;
 471                                         channels_.push_back(ch);
 472                                         ch_added = true;
 473                                         break;
 474                                 }
 475
 476                         if (!ch_added) {
 477                                 // Create new entry without a mapped signal
 478                                 data::DecodeChannel ch = {id++, true, nullptr,
 479                                         QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc),
 480                                         SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch};
 481                                 channels_.push_back(ch);
 482                         }
 483                 }
 484         }
 485
 486         // Invalidate the logic output data if the channel assignment changed
 487         if (prev_channels.size() != channels_.size()) {
 488                 // The number of channels changed, there's definitely a difference
 489                 logic_mux_data_invalid_ = true;
 490         } else {
 491                 // Same number but assignment may still differ, so compare all channels
 492                 for (size_t i = 0; i < channels_.size(); i++) {
 493                         const data::DecodeChannel &p_ch = prev_channels[i];
 494                         const data::DecodeChannel &ch = channels_[i];
 495
 496                         if ((p_ch.pdch_ != ch.pdch_) ||
 497                                 (p_ch.assigned_signal != ch.assigned_signal)) {
 498                                 logic_mux_data_invalid_ = true;
 499                                 break;
 500                         }
 501                 }
 502
 503         }
 504
 505         channels_updated();
 506 }
 507
 508 void DecodeSignal::commit_decoder_channels()
 509 {
 510         // Submit channel list to every decoder, containing only the relevant channels
 511         for (shared_ptr<decode::Decoder> dec : stack_) {
 512                 vector<data::DecodeChannel*> channel_list;
 513
 514                 for (data::DecodeChannel &ch : channels_)
 515                         if (ch.decoder_ == dec)
 516                                 channel_list.push_back(&ch);
 517
 518                 dec->set_channels(channel_list);
 519         }
 520 }
 521
 522 void DecodeSignal::mux_logic_samples(const int64_t start, const int64_t end)
 523 {
 524         // Enforce end to be greater than start
 525         if (end <= start)
 526                 return;
 527
 528         // Fetch all segments and their data
 529         // TODO Currently, we assume only a single segment exists
 530         vector<shared_ptr<LogicSegment> > segments;
 531         vector<const uint8_t*> signal_data;
 532         vector<uint8_t> signal_in_bytepos;
 533         vector<uint8_t> signal_in_bitpos;
 534
 535         for (data::DecodeChannel &ch : channels_)
 536                 if (ch.assigned_signal) {
 537                         const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 538                         const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front();
 539                         segments.push_back(segment);
 540                         signal_data.push_back(segment->get_samples(start, end));
 541
 542                         const int bitpos = ch.assigned_signal->logic_bit_index();
 543                         signal_in_bytepos.push_back(bitpos / 8);
 544                         signal_in_bitpos.push_back(bitpos % 8);
 545                 }
 546
 547         // Perform the muxing of signal data into the output data
 548         uint8_t* output = new uint8_t[(end - start) * segment_->unit_size()];
 549         unsigned int signal_count = signal_data.size();
 550
 551         for (int64_t sample_cnt = 0; sample_cnt < (end - start); sample_cnt++) {
 552                 int bitpos = 0;
 553                 uint8_t bytepos = 0;
 554
 555                 const int out_sample_pos = sample_cnt * segment_->unit_size();
 556                 for (unsigned int i = 0; i < segment_->unit_size(); i++)
 557                         output[out_sample_pos + i] = 0;
 558
 559                 for (unsigned int i = 0; i < signal_count; i++) {
 560                         const int in_sample_pos = sample_cnt * segments[i]->unit_size();
 561                         const uint8_t in_sample = 1 &
 562                                 ((signal_data[i][in_sample_pos + signal_in_bytepos[i]]) >> (signal_in_bitpos[i]));
 563
 564                         const uint8_t out_sample = output[out_sample_pos + bytepos];
 565
 566                         output[out_sample_pos + bytepos] = out_sample | (in_sample << bitpos);
 567
 568                         bitpos++;
 569                         if (bitpos > 7) {
 570                                 bitpos = 0;
 571                                 bytepos++;
 572                         }
 573                 }
 574         }
 575
 576         segment_->append_payload(output, (end - start) * segment_->unit_size());
 577         delete[] output;
 578
 579         for (const uint8_t* data : signal_data)
 580                 delete[] data;
 581 }
 582
 583 void DecodeSignal::logic_mux_proc()
 584 {
 585         do {
 586
 587                 const uint64_t input_sample_count = get_working_sample_count();
 588                 const uint64_t output_sample_count = segment_->get_sample_count();
 589
 590                 const uint64_t samples_to_process =
 591                         (input_sample_count > output_sample_count) ?
 592                         (input_sample_count - output_sample_count) : 0;
 593
 594                 // Process the samples if necessary...
 595                 if (samples_to_process > 0) {
 596                         const uint64_t unit_size = segment_->unit_size();
 597                         const uint64_t chunk_sample_count = DecodeChunkLength / unit_size;
 598
 599                         uint64_t processed_samples = 0;
 600                         do {
 601                                 const uint64_t start_sample = output_sample_count + processed_samples;
 602                                 const uint64_t sample_count =
 603                                         min(samples_to_process - processed_samples,     chunk_sample_count);
 604
 605                                 mux_logic_samples(start_sample, start_sample + sample_count);
 606                                 processed_samples += sample_count;
 607
 608                                 // ...and process the newly muxed logic data
 609                                 decode_input_cond_.notify_one();
 610                         } while (processed_samples < samples_to_process);
 611                 }
 612
 613                 if (session_.get_capture_state() != Session::Stopped) {
 614                         // Wait for more input
 615                         unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
 616                         logic_mux_cond_.wait(logic_mux_lock);
 617                 }
 618         } while ((session_.get_capture_state() != Session::Stopped) && !logic_mux_interrupt_);
 619
 620         // No more input data and session is stopped, let the decode thread
 621         // process any pending data, terminate and release the global SRD mutex
 622         // in order to let other decoders run
 623         decode_input_cond_.notify_one();
 624 }
 625
 626 void DecodeSignal::decode_data(
 627         const int64_t abs_start_samplenum, const int64_t sample_count,
 628         srd_session *const session)
 629 {
 630         const int64_t unit_size = segment_->unit_size();
 631         const int64_t chunk_sample_count = DecodeChunkLength / unit_size;
 632
 633         for (int64_t i = abs_start_samplenum;
 634                 !decode_interrupt_ && (i < (abs_start_samplenum + sample_count));
 635                 i += chunk_sample_count) {
 636
 637                 const int64_t chunk_end = min(i + chunk_sample_count,
 638                         abs_start_samplenum + sample_count);
 639
 640                 const uint8_t* chunk = segment_->get_samples(i, chunk_end);
 641
 642                 if (srd_session_send(session, i, chunk_end, chunk,
 643                                 (chunk_end - i) * unit_size, unit_size) != SRD_OK) {
 644                         error_message_ = tr("Decoder reported an error");
 645                         delete[] chunk;
 646                         break;
 647                 }
 648                 delete[] chunk;
 649
 650                 {
 651                         lock_guard<mutex> lock(output_mutex_);
 652                         samples_decoded_ = chunk_end;
 653                 }
 654         }
 655 }
 656
 657 void DecodeSignal::decode_proc()
 658 {
 659         srd_session *session;
 660         srd_decoder_inst *prev_di = nullptr;
 661
 662         // Prevent any other decode threads from accessing libsigrokdecode
 663         lock_guard<mutex> srd_lock(global_srd_mutex_);
 664
 665         // Create the session
 666         srd_session_new(&session);
 667         assert(session);
 668
 669         // Create the decoders
 670         for (const shared_ptr<decode::Decoder> &dec : stack_) {
 671                 srd_decoder_inst *const di = dec->create_decoder_inst(session);
 672
 673                 if (!di) {
 674                         error_message_ = tr("Failed to create decoder instance");
 675                         srd_session_destroy(session);
 676                         return;
 677                 }
 678
 679                 if (prev_di)
 680                         srd_inst_stack(session, prev_di, di);
 681
 682                 prev_di = di;
 683         }
 684
 685         // Start the session
 686         srd_session_metadata_set(session, SRD_CONF_SAMPLERATE,
 687                 g_variant_new_uint64(samplerate_));
 688
 689         srd_pd_output_callback_add(session, SRD_OUTPUT_ANN,
 690                 DecodeSignal::annotation_callback, this);
 691
 692         srd_session_start(session);
 693
 694         uint64_t sample_count;
 695         uint64_t abs_start_samplenum = 0;
 696         do {
 697                 // Keep processing new samples until we exhaust the input data
 698                 do {
 699                         {
 700                                 lock_guard<mutex> input_lock(input_mutex_);
 701                                 sample_count = segment_->get_sample_count() - abs_start_samplenum;
 702                         }
 703
 704                         if (sample_count > 0) {
 705                                 decode_data(abs_start_samplenum, sample_count, session);
 706                                 abs_start_samplenum += sample_count;
 707                         }
 708                 } while (error_message_.isEmpty() && (sample_count > 0));
 709
 710                 // Terminate if we exhausted the input data
 711                 if ((int64_t)segment_->get_sample_count() == get_working_sample_count())
 712                         break;
 713
 714                 if (error_message_.isEmpty()) {
 715                         // Wait for new input data or an interrupt request
 716                         unique_lock<mutex> input_wait_lock(input_mutex_);
 717                         decode_input_cond_.wait(input_wait_lock);
 718                 }
 719         } while (error_message_.isEmpty() && !decode_interrupt_);
 720
 721         // Make sure all annotations are known to the frontend
 722         new_annotations();
 723
 724         // Destroy the session
 725         srd_session_destroy(session);
 726 }
 727
 728 void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signal)
 729 {
 730         assert(pdata);
 731         assert(decoder);
 732
 733         DecodeSignal *const ds = (DecodeSignal*)decode_signal;
 734         assert(ds);
 735
 736         lock_guard<mutex> lock(ds->output_mutex_);
 737
 738         const decode::Annotation a(pdata);
 739
 740         // Find the row
 741         assert(pdata->pdo);
 742         assert(pdata->pdo->di);
 743         const srd_decoder *const decc = pdata->pdo->di->decoder;
 744         assert(decc);
 745
 746         auto row_iter = ds->rows_.end();
 747
 748         // Try looking up the sub-row of this class
 749         const auto r = ds->class_rows_.find(make_pair(decc, a.format()));
 750         if (r != ds->class_rows_.end())
 751                 row_iter = ds->rows_.find((*r).second);
 752         else {
 753                 // Failing that, use the decoder as a key
 754                 row_iter = ds->rows_.find(Row(decc));
 755         }
 756
 757         assert(row_iter != ds->rows_.end());
 758         if (row_iter == ds->rows_.end()) {
 759                 qDebug() << "Unexpected annotation: decoder = " << decc <<
 760                         ", format = " << a.format();
 761                 assert(false);
 762                 return;
 763         }
 764
 765         // Add the annotation
 766         (*row_iter).second.push_annotation(a);
 767
 768         // Notify the frontend every DecodeNotifyPeriod annotations
 769         if (ds->inc_annotation_count() % DecodeNotifyPeriod == 0)
 770                 ds->new_annotations();
 771 }
 772
 773 void DecodeSignal::on_capture_state_changed(int state)
 774 {
 775         // If a new acquisition was started, we need to start decoding from scratch
 776         if (state == Session::Running)
 777                 begin_decode();
 778 }
 779
 780 void DecodeSignal::on_data_received()
 781 {
 782         logic_mux_cond_.notify_one();
 783 }
 784
 785 void DecodeSignal::on_frame_ended()
 786 {
 787         logic_mux_cond_.notify_one();
 788 }
 789
 790 } // namespace data
 791 } // namespace pv