pv/sigsession.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 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 #include "sigsession.h"
  22
  23 #include "data/analog.h"
  24 #include "data/analogsnapshot.h"
  25 #include "data/logic.h"
  26 #include "data/logicsnapshot.h"
  27 #include "view/analogsignal.h"
  28 #include "view/logicsignal.h"
  29
  30 #include <QDebug>
  31
  32 #include <assert.h>
  33
  34 using namespace boost;
  35 using namespace std;
  36
  37 namespace pv {
  38
  39 // TODO: This should not be necessary
  40 SigSession* SigSession::_session = NULL;
  41
  42 SigSession::SigSession() :
  43         _capture_state(Stopped)
  44 {
  45         // TODO: This should not be necessary
  46         _session = this;
  47 }
  48
  49 SigSession::~SigSession()
  50 {
  51         stop_capture();
  52
  53         if (_sampling_thread.get())
  54                 _sampling_thread->join();
  55         _sampling_thread.reset();
  56
  57         // TODO: This should not be necessary
  58         _session = NULL;
  59 }
  60
  61 void SigSession::load_file(const string &name)
  62 {
  63         stop_capture();
  64         _sampling_thread.reset(new boost::thread(
  65                 &SigSession::load_thread_proc, this, name));
  66 }
  67
  68 SigSession::capture_state SigSession::get_capture_state() const
  69 {
  70         lock_guard<mutex> lock(_sampling_mutex);
  71         return _capture_state;
  72 }
  73
  74 void SigSession::start_capture(struct sr_dev_inst *sdi,
  75         uint64_t record_length, uint64_t sample_rate)
  76 {
  77         stop_capture();
  78
  79         lock_guard<mutex> lock(_sampling_mutex);
  80         _sample_rate = sample_rate;
  81
  82         _sampling_thread.reset(new boost::thread(
  83                 &SigSession::sample_thread_proc, this, sdi,
  84                 record_length));
  85 }
  86
  87 void SigSession::stop_capture()
  88 {
  89         if (get_capture_state() == Stopped)
  90                 return;
  91
  92         sr_session_stop();
  93
  94         // Check that sampling stopped
  95         if (_sampling_thread.get())
  96                 _sampling_thread->join();
  97         _sampling_thread.reset();
  98 }
  99
 100 vector< shared_ptr<view::Signal> > SigSession::get_signals()
 101 {
 102         lock_guard<mutex> lock(_signals_mutex);
 103         return _signals;
 104 }
 105
 106 boost::shared_ptr<data::Logic> SigSession::get_data()
 107 {
 108         return _logic_data;
 109 }
 110
 111 void SigSession::set_capture_state(capture_state state)
 112 {
 113         lock_guard<mutex> lock(_sampling_mutex);
 114         _capture_state = state;
 115         capture_state_changed(state);
 116 }
 117
 118 void SigSession::load_thread_proc(const string name)
 119 {
 120         if (sr_session_load(name.c_str()) != SR_OK) {
 121                 qDebug() << "Failed to load file.";
 122                 return;
 123         }
 124
 125         sr_session_datafeed_callback_add(data_feed_in_proc);
 126
 127         if (sr_session_start() != SR_OK) {
 128                 qDebug() << "Failed to start session.";
 129                 return;
 130         }
 131
 132         set_capture_state(Running);
 133
 134         sr_session_run();
 135         sr_session_stop();
 136
 137         set_capture_state(Stopped);
 138 }
 139
 140 void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
 141         uint64_t record_length)
 142 {
 143         assert(sdi);
 144
 145         sr_session_new();
 146         sr_session_datafeed_callback_add(data_feed_in_proc);
 147
 148         if (sr_session_dev_add(sdi) != SR_OK) {
 149                 qDebug() << "Failed to use device.";
 150                 sr_session_destroy();
 151                 return;
 152         }
 153
 154         // Set the sample limit
 155         if (sr_config_set(sdi, SR_CONF_LIMIT_SAMPLES,
 156                 &record_length) != SR_OK) {
 157                 qDebug() << "Failed to configure time-based sample limit.";
 158                 sr_session_destroy();
 159                 return;
 160         }
 161
 162         // Set the samplerate
 163         {
 164                 lock_guard<mutex> lock(_sampling_mutex);
 165                 if (sr_config_set(sdi, SR_CONF_SAMPLERATE,
 166                         &_sample_rate) != SR_OK) {
 167                         qDebug() << "Failed to configure samplerate.";
 168                         sr_session_destroy();
 169                         return;
 170                 }
 171         }
 172
 173         if (sr_session_start() != SR_OK) {
 174                 qDebug() << "Failed to start session.";
 175                 return;
 176         }
 177
 178         set_capture_state(Running);
 179
 180         sr_session_run();
 181         sr_session_destroy();
 182
 183         set_capture_state(Stopped);
 184 }
 185
 186 void SigSession::feed_in_header(const sr_dev_inst *sdi)
 187 {
 188         shared_ptr<view::Signal> signal;
 189         unsigned int logic_probe_count = 0;
 190         unsigned int analog_probe_count = 0;
 191
 192         // Detect what data types we will receive
 193         for (const GSList *l = sdi->probes; l; l = l->next) {
 194                 const sr_probe *const probe = (const sr_probe *)l->data;
 195                 if (!probe->enabled)
 196                         continue;
 197
 198                 switch(probe->type) {
 199                 case SR_PROBE_LOGIC:
 200                         logic_probe_count++;
 201                         break;
 202
 203                 case SR_PROBE_ANALOG:
 204                         analog_probe_count++;
 205                         break;
 206                 }
 207         }
 208
 209         // Create data containers for the coming data snapshots
 210         {
 211                 lock_guard<mutex> data_lock(_data_mutex);
 212                 lock_guard<mutex> sampling_lock(_sampling_mutex);
 213
 214                 if (logic_probe_count != 0) {
 215                         _logic_data.reset(new data::Logic(
 216                                 logic_probe_count, _sample_rate));
 217                         assert(_logic_data);
 218                 }
 219
 220                 if (analog_probe_count != 0) {
 221                         _analog_data.reset(new data::Analog(_sample_rate));
 222                         assert(_analog_data);
 223                 }
 224         }
 225
 226         // Make the logic probe list
 227         {
 228                 lock_guard<mutex> lock(_signals_mutex);
 229
 230                 _signals.clear();
 231
 232                 for (const GSList *l = sdi->probes; l; l = l->next) {
 233                         const sr_probe *const probe =
 234                                 (const sr_probe *)l->data;
 235                         assert(probe);
 236                         if (!probe->enabled)
 237                                 continue;
 238
 239                         switch(probe->type) {
 240                         case SR_PROBE_LOGIC:
 241                                 signal = shared_ptr<view::Signal>(
 242                                         new view::LogicSignal(probe->name,
 243                                                 _logic_data, probe->index));
 244                                 break;
 245
 246                         case SR_PROBE_ANALOG:
 247                                 signal = shared_ptr<view::Signal>(
 248                                         new view::AnalogSignal(probe->name,
 249                                                 _analog_data));
 250                                 break;
 251                         }
 252
 253                         _signals.push_back(signal);
 254                 }
 255
 256                 signals_changed();
 257         }
 258 }
 259
 260 void SigSession::feed_in_meta(const sr_dev_inst *sdi,
 261         const sr_datafeed_meta &meta)
 262 {
 263         for (const GSList *l = meta.config; l; l = l->next) {
 264                 const sr_config *const src = (const sr_config*)l->data;
 265                 switch (src->key) {
 266                 case SR_CONF_SAMPLERATE:
 267                         /// @todo handle samplerate changes
 268                         /// samplerate = (uint64_t *)src->value;
 269                         break;
 270                 default:
 271                         // Unknown metadata is not an error.
 272                         break;
 273                 }
 274         }
 275 }
 276
 277 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 278 {
 279         lock_guard<mutex> lock(_data_mutex);
 280         if (!_cur_logic_snapshot)
 281         {
 282                 assert(_logic_data);
 283
 284                 // Create a new data snapshot
 285                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 286                         new data::LogicSnapshot(logic));
 287                 _logic_data->push_snapshot(_cur_logic_snapshot);
 288         }
 289         else
 290         {
 291                 // Append to the existing data snapshot
 292                 _cur_logic_snapshot->append_payload(logic);
 293         }
 294
 295         data_updated();
 296 }
 297
 298 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 299 {
 300         lock_guard<mutex> lock(_data_mutex);
 301         if (!_cur_analog_snapshot)
 302         {
 303                 assert(_analog_data);
 304
 305                 // Create a new data snapshot
 306                 _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>(
 307                         new data::AnalogSnapshot(analog));
 308                 _analog_data->push_snapshot(_cur_analog_snapshot);
 309         }
 310         else
 311         {
 312                 // Append to the existing data snapshot
 313                 _cur_analog_snapshot->append_payload(analog);
 314         }
 315
 316         data_updated();
 317 }
 318
 319 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 320         const struct sr_datafeed_packet *packet)
 321 {
 322         assert(sdi);
 323         assert(packet);
 324
 325         switch (packet->type) {
 326         case SR_DF_HEADER:
 327                 feed_in_header(sdi);
 328                 break;
 329
 330         case SR_DF_META:
 331                 assert(packet->payload);
 332                 feed_in_meta(sdi,
 333                         *(const sr_datafeed_meta*)packet->payload);
 334                 break;
 335
 336         case SR_DF_LOGIC:
 337                 assert(packet->payload);
 338                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 339                 break;
 340
 341         case SR_DF_ANALOG:
 342                 assert(packet->payload);
 343                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 344                 break;
 345
 346         case SR_DF_END:
 347         {
 348                 {
 349                         lock_guard<mutex> lock(_data_mutex);
 350                         _cur_logic_snapshot.reset();
 351                         _cur_analog_snapshot.reset();
 352                 }
 353                 data_updated();
 354                 break;
 355         }
 356         }
 357 }
 358
 359 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 360         const struct sr_datafeed_packet *packet)
 361 {
 362         assert(_session);
 363         _session->data_feed_in(sdi, packet);
 364 }
 365
 366 } // namespace pv