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