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