pv/sigsession.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk>
   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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifdef ENABLE_DECODE
  22 #include <libsigrokdecode/libsigrokdecode.h>
  23 #endif
  24
  25 #include "sigsession.h"
  26
  27 #include "devicemanager.h"
  28 #include "device/device.h"
  29
  30 #include "data/analog.h"
  31 #include "data/analogsnapshot.h"
  32 #include "data/decoderstack.h"
  33 #include "data/logic.h"
  34 #include "data/logicsnapshot.h"
  35 #include "data/decode/decoder.h"
  36
  37 #include "view/analogsignal.h"
  38 #include "view/decodetrace.h"
  39 #include "view/logicsignal.h"
  40
  41 #include <assert.h>
  42
  43 #include <stdexcept>
  44
  45 #include <boost/foreach.hpp>
  46
  47 #include <sys/stat.h>
  48
  49 #include <QDebug>
  50
  51 using boost::dynamic_pointer_cast;
  52 using boost::function;
  53 using boost::lock_guard;
  54 using boost::mutex;
  55 using boost::shared_ptr;
  56 using std::map;
  57 using std::set;
  58 using std::string;
  59 using std::vector;
  60
  61 namespace pv {
  62
  63 // TODO: This should not be necessary
  64 SigSession* SigSession::_session = NULL;
  65
  66 SigSession::SigSession(DeviceManager &device_manager) :
  67         _device_manager(device_manager),
  68         _capture_state(Stopped)
  69 {
  70         // TODO: This should not be necessary
  71         _session = this;
  72 }
  73
  74 SigSession::~SigSession()
  75 {
  76         using pv::device::Device;
  77
  78         stop_capture();
  79
  80         if (_sampling_thread.joinable())
  81                 _sampling_thread.join();
  82
  83         shared_ptr<Device> device(dynamic_pointer_cast<Device>(_dev_inst));
  84         if (device)
  85                 _device_manager.release_device(device);
  86
  87         // TODO: This should not be necessary
  88         _session = NULL;
  89 }
  90
  91 shared_ptr<device::DevInst> SigSession::get_device() const
  92 {
  93         return _dev_inst;
  94 }
  95
  96 void SigSession::set_device(shared_ptr<device::DevInst> dev_inst)
  97 {
  98         using pv::device::Device;
  99
 100         // Ensure we are not capturing before setting the device
 101         stop_capture();
 102
 103         shared_ptr<Device> old_device(dynamic_pointer_cast<Device>(_dev_inst));
 104         if (old_device)
 105                 _device_manager.release_device(old_device);
 106
 107         shared_ptr<Device> new_device(dynamic_pointer_cast<Device>(dev_inst));
 108         if (new_device)
 109                 _device_manager.use_device(new_device, this);
 110
 111         _dev_inst = dev_inst;
 112         update_signals(dev_inst);
 113 }
 114
 115 void SigSession::release_device(shared_ptr<device::DevInst> dev_inst)
 116 {
 117         (void)dev_inst;
 118
 119         assert(_capture_state == Stopped);
 120         _dev_inst = shared_ptr<device::DevInst>();
 121 }
 122
 123 void SigSession::load_file(const string &name,
 124         function<void (const QString)> error_handler)
 125 {
 126         stop_capture();
 127
 128         if (sr_session_load(name.c_str()) == SR_OK) {
 129                 GSList *devlist = NULL;
 130                 sr_session_dev_list(&devlist);
 131
 132                 if (!devlist || !devlist->data ||
 133                         sr_session_start() != SR_OK) {
 134                         error_handler(tr("Failed to start session."));
 135                         return;
 136                 }
 137
 138                 shared_ptr<device::DevInst> dev_inst(
 139                         new device::Device((sr_dev_inst*)devlist->data));
 140                 g_slist_free(devlist);
 141
 142                 _decode_traces.clear();
 143                 update_signals(dev_inst);
 144                 read_sample_rate(dev_inst->dev_inst());
 145
 146                 _sampling_thread = boost::thread(
 147                         &SigSession::load_session_thread_proc, this,
 148                         error_handler);
 149
 150         } else {
 151                 sr_input *in = NULL;
 152
 153                 if (!(in = load_input_file_format(name.c_str(),
 154                         error_handler)))
 155                         return;
 156
 157                 _decode_traces.clear();
 158                 update_signals(shared_ptr<device::DevInst>(
 159                         new device::Device(in->sdi)));
 160                 read_sample_rate(in->sdi);
 161
 162                 _sampling_thread = boost::thread(
 163                         &SigSession::load_input_thread_proc, this,
 164                         name, in, error_handler);
 165         }
 166 }
 167
 168 SigSession::capture_state SigSession::get_capture_state() const
 169 {
 170         lock_guard<mutex> lock(_sampling_mutex);
 171         return _capture_state;
 172 }
 173
 174 void SigSession::start_capture(function<void (const QString)> error_handler)
 175 {
 176         stop_capture();
 177
 178         // Check that a device instance has been selected.
 179         if (!_dev_inst) {
 180                 qDebug() << "No device selected";
 181                 return;
 182         }
 183
 184         assert(_dev_inst->dev_inst());
 185
 186         // Check that at least one probe is enabled
 187         const GSList *l;
 188         for (l = _dev_inst->dev_inst()->probes; l; l = l->next) {
 189                 sr_probe *const probe = (sr_probe*)l->data;
 190                 assert(probe);
 191                 if (probe->enabled)
 192                         break;
 193         }
 194
 195         if (!l) {
 196                 error_handler(tr("No probes enabled."));
 197                 return;
 198         }
 199
 200         // Begin the session
 201         _sampling_thread = boost::thread(
 202                 &SigSession::sample_thread_proc, this, _dev_inst,
 203                         error_handler);
 204 }
 205
 206 void SigSession::stop_capture()
 207 {
 208         if (get_capture_state() == Stopped)
 209                 return;
 210
 211         sr_session_stop();
 212
 213         // Check that sampling stopped
 214         if (_sampling_thread.joinable())
 215                 _sampling_thread.join();
 216 }
 217
 218 set< shared_ptr<data::SignalData> > SigSession::get_data() const
 219 {
 220         lock_guard<mutex> lock(_signals_mutex);
 221         set< shared_ptr<data::SignalData> > data;
 222         BOOST_FOREACH(const shared_ptr<view::Signal> sig, _signals) {
 223                 assert(sig);
 224                 data.insert(sig->data());
 225         }
 226
 227         return data;
 228 }
 229
 230 vector< shared_ptr<view::Signal> > SigSession::get_signals() const
 231 {
 232         lock_guard<mutex> lock(_signals_mutex);
 233         return _signals;
 234 }
 235
 236 #ifdef ENABLE_DECODE
 237 bool SigSession::add_decoder(srd_decoder *const dec)
 238 {
 239         map<const srd_probe*, shared_ptr<view::LogicSignal> > probes;
 240         shared_ptr<data::DecoderStack> decoder_stack;
 241
 242         try
 243         {
 244                 lock_guard<mutex> lock(_signals_mutex);
 245
 246                 // Create the decoder
 247                 decoder_stack = shared_ptr<data::DecoderStack>(
 248                         new data::DecoderStack(dec));
 249
 250                 // Make a list of all the probes
 251                 std::vector<const srd_probe*> all_probes;
 252                 for(const GSList *i = dec->probes; i; i = i->next)
 253                         all_probes.push_back((const srd_probe*)i->data);
 254                 for(const GSList *i = dec->opt_probes; i; i = i->next)
 255                         all_probes.push_back((const srd_probe*)i->data);
 256
 257                 // Auto select the initial probes
 258                 BOOST_FOREACH(const srd_probe *probe, all_probes)
 259                         BOOST_FOREACH(shared_ptr<view::Signal> s, _signals)
 260                         {
 261                                 shared_ptr<view::LogicSignal> l =
 262                                         dynamic_pointer_cast<view::LogicSignal>(s);
 263                                 if (l && QString::fromUtf8(probe->name).
 264                                         toLower().contains(
 265                                         l->get_name().toLower()))
 266                                         probes[probe] = l;
 267                         }
 268
 269                 assert(decoder_stack);
 270                 assert(!decoder_stack->stack().empty());
 271                 assert(decoder_stack->stack().front());
 272                 decoder_stack->stack().front()->set_probes(probes);
 273
 274                 // Create the decode signal
 275                 shared_ptr<view::DecodeTrace> d(
 276                         new view::DecodeTrace(*this, decoder_stack,
 277                                 _decode_traces.size()));
 278                 _decode_traces.push_back(d);
 279         }
 280         catch(std::runtime_error e)
 281         {
 282                 return false;
 283         }
 284
 285         signals_changed();
 286
 287         // Do an initial decode
 288         decoder_stack->begin_decode();
 289
 290         return true;
 291 }
 292
 293 vector< shared_ptr<view::DecodeTrace> > SigSession::get_decode_signals() const
 294 {
 295         lock_guard<mutex> lock(_signals_mutex);
 296         return _decode_traces;
 297 }
 298
 299 void SigSession::remove_decode_signal(view::DecodeTrace *signal)
 300 {
 301         for (vector< shared_ptr<view::DecodeTrace> >::iterator i =
 302                 _decode_traces.begin();
 303                 i != _decode_traces.end();
 304                 i++)
 305                 if ((*i).get() == signal)
 306                 {
 307                         _decode_traces.erase(i);
 308                         signals_changed();
 309                         return;
 310                 }
 311 }
 312 #endif
 313
 314 void SigSession::set_capture_state(capture_state state)
 315 {
 316         lock_guard<mutex> lock(_sampling_mutex);
 317         const bool changed = _capture_state != state;
 318         _capture_state = state;
 319         if(changed)
 320                 capture_state_changed(state);
 321 }
 322
 323 /**
 324  * Attempts to autodetect the format. Failing that
 325  * @param filename The filename of the input file.
 326  * @return A pointer to the 'struct sr_input_format' that should be used,
 327  *         or NULL if no input format was selected or auto-detected.
 328  */
 329 sr_input_format* SigSession::determine_input_file_format(
 330         const string &filename)
 331 {
 332         int i;
 333
 334         /* If there are no input formats, return NULL right away. */
 335         sr_input_format *const *const inputs = sr_input_list();
 336         if (!inputs) {
 337                 g_critical("No supported input formats available.");
 338                 return NULL;
 339         }
 340
 341         /* Otherwise, try to find an input module that can handle this file. */
 342         for (i = 0; inputs[i]; i++) {
 343                 if (inputs[i]->format_match(filename.c_str()))
 344                         break;
 345         }
 346
 347         /* Return NULL if no input module wanted to touch this. */
 348         if (!inputs[i]) {
 349                 g_critical("Error: no matching input module found.");
 350                 return NULL;
 351         }
 352
 353         return inputs[i];
 354 }
 355
 356 sr_input* SigSession::load_input_file_format(const string &filename,
 357         function<void (const QString)> error_handler,
 358         sr_input_format *format)
 359 {
 360         struct stat st;
 361         sr_input *in;
 362
 363         if (!format && !(format =
 364                 determine_input_file_format(filename.c_str()))) {
 365                 /* The exact cause was already logged. */
 366                 return NULL;
 367         }
 368
 369         if (stat(filename.c_str(), &st) == -1) {
 370                 error_handler(tr("Failed to load file"));
 371                 return NULL;
 372         }
 373
 374         /* Initialize the input module. */
 375         if (!(in = new sr_input)) {
 376                 qDebug("Failed to allocate input module.\n");
 377                 return NULL;
 378         }
 379
 380         in->format = format;
 381         in->param = NULL;
 382         if (in->format->init &&
 383                 in->format->init(in, filename.c_str()) != SR_OK) {
 384                 qDebug("Input format init failed.\n");
 385                 return NULL;
 386         }
 387
 388         sr_session_new();
 389
 390         if (sr_session_dev_add(in->sdi) != SR_OK) {
 391                 qDebug("Failed to use device.\n");
 392                 sr_session_destroy();
 393                 return NULL;
 394         }
 395
 396         return in;
 397 }
 398
 399 void SigSession::update_signals(shared_ptr<device::DevInst> dev_inst)
 400 {
 401         assert(dev_inst);
 402         assert(_capture_state == Stopped);
 403
 404         unsigned int logic_probe_count = 0;
 405
 406         // Clear the decode traces
 407         _decode_traces.clear();
 408
 409         // Detect what data types we will receive
 410         if(dev_inst) {
 411                 assert(dev_inst->dev_inst());
 412                 for (const GSList *l = dev_inst->dev_inst()->probes;
 413                         l; l = l->next) {
 414                         const sr_probe *const probe = (const sr_probe *)l->data;
 415                         if (!probe->enabled)
 416                                 continue;
 417
 418                         switch(probe->type) {
 419                         case SR_PROBE_LOGIC:
 420                                 logic_probe_count++;
 421                                 break;
 422                         }
 423                 }
 424         }
 425
 426         // Create data containers for the logic data snapshots
 427         {
 428                 lock_guard<mutex> data_lock(_data_mutex);
 429
 430                 _logic_data.reset();
 431                 if (logic_probe_count != 0) {
 432                         _logic_data.reset(new data::Logic(
 433                                 logic_probe_count));
 434                         assert(_logic_data);
 435                 }
 436         }
 437
 438         // Make the Signals list
 439         do {
 440                 lock_guard<mutex> lock(_signals_mutex);
 441
 442                 _signals.clear();
 443
 444                 if(!dev_inst)
 445                         break;
 446
 447                 assert(dev_inst->dev_inst());
 448                 for (const GSList *l = dev_inst->dev_inst()->probes;
 449                         l; l = l->next) {
 450                         shared_ptr<view::Signal> signal;
 451                         sr_probe *const probe = (sr_probe *)l->data;
 452                         assert(probe);
 453
 454                         switch(probe->type) {
 455                         case SR_PROBE_LOGIC:
 456                                 signal = shared_ptr<view::Signal>(
 457                                         new view::LogicSignal(dev_inst,
 458                                                 probe, _logic_data));
 459                                 break;
 460
 461                         case SR_PROBE_ANALOG:
 462                         {
 463                                 shared_ptr<data::Analog> data(
 464                                         new data::Analog());
 465                                 signal = shared_ptr<view::Signal>(
 466                                         new view::AnalogSignal(dev_inst,
 467                                                 probe, data));
 468                                 break;
 469                         }
 470
 471                         default:
 472                                 assert(0);
 473                                 break;
 474                         }
 475
 476                         assert(signal);
 477                         _signals.push_back(signal);
 478                 }
 479
 480         } while(0);
 481
 482         signals_changed();
 483 }
 484
 485 bool SigSession::is_trigger_enabled() const
 486 {
 487         assert(_dev_inst);
 488         assert(_dev_inst->dev_inst());
 489         for (const GSList *l = _dev_inst->dev_inst()->probes; l; l = l->next) {
 490                 const sr_probe *const p = (const sr_probe *)l->data;
 491                 assert(p);
 492                 if (p->trigger && p->trigger[0] != '\0')
 493                         return true;
 494         }
 495
 496         return false;
 497 }
 498
 499 shared_ptr<view::Signal> SigSession::signal_from_probe(
 500         const sr_probe *probe) const
 501 {
 502         lock_guard<mutex> lock(_signals_mutex);
 503         BOOST_FOREACH(shared_ptr<view::Signal> sig, _signals) {
 504                 assert(sig);
 505                 if (sig->probe() == probe)
 506                         return sig;
 507         }
 508         return shared_ptr<view::Signal>();
 509 }
 510
 511 void SigSession::read_sample_rate(const sr_dev_inst *const sdi)
 512 {
 513         GVariant *gvar;
 514         uint64_t sample_rate = 0;
 515
 516         // Read out the sample rate
 517         if(sdi->driver)
 518         {
 519                 const int ret = sr_config_get(sdi->driver, sdi, NULL,
 520                         SR_CONF_SAMPLERATE, &gvar);
 521                 if (ret != SR_OK) {
 522                         qDebug("Failed to get samplerate\n");
 523                         return;
 524                 }
 525
 526                 sample_rate = g_variant_get_uint64(gvar);
 527                 g_variant_unref(gvar);
 528         }
 529
 530         // Set the sample rate of all data
 531         const set< shared_ptr<data::SignalData> > data_set = get_data();
 532         BOOST_FOREACH(shared_ptr<data::SignalData> data, data_set) {
 533                 assert(data);
 534                 data->set_samplerate(sample_rate);
 535         }
 536 }
 537
 538 void SigSession::load_session_thread_proc(
 539         function<void (const QString)> error_handler)
 540 {
 541         (void)error_handler;
 542
 543         sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
 544
 545         set_capture_state(Running);
 546
 547         sr_session_run();
 548
 549         sr_session_destroy();
 550         set_capture_state(Stopped);
 551
 552         // Confirm that SR_DF_END was received
 553         assert(!_cur_logic_snapshot);
 554         assert(_cur_analog_snapshots.empty());
 555 }
 556
 557 void SigSession::load_input_thread_proc(const string name,
 558         sr_input *in, function<void (const QString)> error_handler)
 559 {
 560         (void)error_handler;
 561
 562         assert(in);
 563         assert(in->format);
 564
 565         sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
 566
 567         set_capture_state(Running);
 568
 569         in->format->loadfile(in, name.c_str());
 570
 571         sr_session_destroy();
 572         set_capture_state(Stopped);
 573
 574         // Confirm that SR_DF_END was received
 575         assert(!_cur_logic_snapshot);
 576         assert(_cur_analog_snapshots.empty());
 577
 578         delete in;
 579 }
 580
 581 void SigSession::sample_thread_proc(shared_ptr<device::DevInst> dev_inst,
 582         function<void (const QString)> error_handler)
 583 {
 584         assert(dev_inst);
 585         assert(dev_inst->dev_inst());
 586         assert(error_handler);
 587
 588         sr_session_new();
 589         sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
 590
 591         if (sr_session_dev_add(dev_inst->dev_inst()) != SR_OK) {
 592                 error_handler(tr("Failed to use device."));
 593                 sr_session_destroy();
 594                 return;
 595         }
 596
 597         if (sr_session_start() != SR_OK) {
 598                 error_handler(tr("Failed to start session."));
 599                 return;
 600         }
 601
 602         set_capture_state(is_trigger_enabled() ? AwaitingTrigger : Running);
 603
 604         sr_session_run();
 605         sr_session_destroy();
 606
 607         set_capture_state(Stopped);
 608
 609         // Confirm that SR_DF_END was received
 610         if (_cur_logic_snapshot)
 611         {
 612                 qDebug("SR_DF_END was not received.");
 613                 assert(0);
 614         }
 615 }
 616
 617 void SigSession::feed_in_header(const sr_dev_inst *sdi)
 618 {
 619         read_sample_rate(sdi);
 620 }
 621
 622 void SigSession::feed_in_meta(const sr_dev_inst *sdi,
 623         const sr_datafeed_meta &meta)
 624 {
 625         (void)sdi;
 626
 627         for (const GSList *l = meta.config; l; l = l->next) {
 628                 const sr_config *const src = (const sr_config*)l->data;
 629                 switch (src->key) {
 630                 case SR_CONF_SAMPLERATE:
 631                         /// @todo handle samplerate changes
 632                         /// samplerate = (uint64_t *)src->value;
 633                         break;
 634                 default:
 635                         // Unknown metadata is not an error.
 636                         break;
 637                 }
 638         }
 639
 640         signals_changed();
 641 }
 642
 643 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 644 {
 645         lock_guard<mutex> lock(_data_mutex);
 646
 647         if (!_logic_data)
 648         {
 649                 qDebug() << "Unexpected logic packet";
 650                 return;
 651         }
 652
 653         if (!_cur_logic_snapshot)
 654         {
 655                 // This could be the first packet after a trigger
 656                 set_capture_state(Running);
 657
 658                 // Create a new data snapshot
 659                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 660                         new data::LogicSnapshot(logic, _dev_inst->get_sample_limit()));
 661                 _logic_data->push_snapshot(_cur_logic_snapshot);
 662         }
 663         else
 664         {
 665                 // Append to the existing data snapshot
 666                 _cur_logic_snapshot->append_payload(logic);
 667         }
 668
 669         data_updated();
 670 }
 671
 672 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 673 {
 674         lock_guard<mutex> lock(_data_mutex);
 675
 676         const unsigned int probe_count = g_slist_length(analog.probes);
 677         const size_t sample_count = analog.num_samples / probe_count;
 678         const float *data = analog.data;
 679         bool sweep_beginning = false;
 680
 681         for (GSList *p = analog.probes; p; p = p->next)
 682         {
 683                 shared_ptr<data::AnalogSnapshot> snapshot;
 684
 685                 sr_probe *const probe = (sr_probe*)p->data;
 686                 assert(probe);
 687
 688                 // Try to get the snapshot of the probe
 689                 const map< const sr_probe*, shared_ptr<data::AnalogSnapshot> >::
 690                         iterator iter = _cur_analog_snapshots.find(probe);
 691                 if (iter != _cur_analog_snapshots.end())
 692                         snapshot = (*iter).second;
 693                 else
 694                 {
 695                         // If no snapshot was found, this means we havn't
 696                         // created one yet. i.e. this is the first packet
 697                         // in the sweep containing this snapshot.
 698                         sweep_beginning = true;
 699
 700                         // Create a snapshot, keep it in the maps of probes
 701                         snapshot = shared_ptr<data::AnalogSnapshot>(
 702                                 new data::AnalogSnapshot(_dev_inst->get_sample_limit()));
 703                         _cur_analog_snapshots[probe] = snapshot;
 704
 705                         // Find the annalog data associated with the probe
 706                         shared_ptr<view::AnalogSignal> sig =
 707                                 dynamic_pointer_cast<view::AnalogSignal>(
 708                                         signal_from_probe(probe));
 709                         assert(sig);
 710
 711                         shared_ptr<data::Analog> data(sig->analog_data());
 712                         assert(data);
 713
 714                         // Push the snapshot into the analog data.
 715                         data->push_snapshot(snapshot);
 716                 }
 717
 718                 assert(snapshot);
 719
 720                 // Append the samples in the snapshot
 721                 snapshot->append_interleaved_samples(data++, sample_count,
 722                         probe_count);
 723         }
 724
 725         if (sweep_beginning) {
 726                 // This could be the first packet after a trigger
 727                 set_capture_state(Running);
 728         }
 729
 730         data_updated();
 731 }
 732
 733 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 734         const struct sr_datafeed_packet *packet)
 735 {
 736         assert(sdi);
 737         assert(packet);
 738
 739         switch (packet->type) {
 740         case SR_DF_HEADER:
 741                 feed_in_header(sdi);
 742                 break;
 743
 744         case SR_DF_META:
 745                 assert(packet->payload);
 746                 feed_in_meta(sdi,
 747                         *(const sr_datafeed_meta*)packet->payload);
 748                 break;
 749
 750         case SR_DF_LOGIC:
 751                 assert(packet->payload);
 752                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 753                 break;
 754
 755         case SR_DF_ANALOG:
 756                 assert(packet->payload);
 757                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 758                 break;
 759
 760         case SR_DF_END:
 761         {
 762                 {
 763                         lock_guard<mutex> lock(_data_mutex);
 764                         _cur_logic_snapshot.reset();
 765                         _cur_analog_snapshots.clear();
 766                 }
 767                 data_updated();
 768                 break;
 769         }
 770         }
 771 }
 772
 773 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 774         const struct sr_datafeed_packet *packet, void *cb_data)
 775 {
 776         (void) cb_data;
 777         assert(_session);
 778         _session->data_feed_in(sdi, packet);
 779 }
 780
 781 } // namespace pv