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         shared_ptr<view::Signal> signal;
 144         unsigned int logic_probe_count = 0;
 145         unsigned int analog_probe_count = 0;
 146
 147         assert(sdi);
 148
 149         sr_session_new();
 150         sr_session_datafeed_callback_add(data_feed_in_proc);
 151
 152         if (sr_session_dev_add(sdi) != SR_OK) {
 153                 qDebug() << "Failed to use device.";
 154                 sr_session_destroy();
 155                 return;
 156         }
 157
 158         // Set the sample limit
 159         if (sr_config_set(sdi, SR_CONF_LIMIT_SAMPLES,
 160                 &record_length) != SR_OK) {
 161                 qDebug() << "Failed to configure time-based sample limit.";
 162                 sr_session_destroy();
 163                 return;
 164         }
 165
 166         // Set the samplerate
 167         {
 168                 lock_guard<mutex> lock(_sampling_mutex);
 169                 if (sr_config_set(sdi, SR_CONF_SAMPLERATE,
 170                         &_sample_rate) != SR_OK) {
 171                         qDebug() << "Failed to configure samplerate.";
 172                         sr_session_destroy();
 173                         return;
 174                 }
 175         }
 176
 177         // Detect what data types we will receive
 178         for (const GSList *l = sdi->probes; l; l = l->next) {
 179                 const sr_probe *const probe = (const sr_probe *)l->data;
 180                 if (!probe->enabled)
 181                         continue;
 182
 183                 switch(probe->type) {
 184                 case SR_PROBE_LOGIC:
 185                         logic_probe_count++;
 186                         break;
 187
 188                 case SR_PROBE_ANALOG:
 189                         analog_probe_count++;
 190                         break;
 191                 }
 192         }
 193
 194         // Create data containers for the coming data snapshots
 195         {
 196                 lock_guard<mutex> data_lock(_data_mutex);
 197                 lock_guard<mutex> sampling_lock(_sampling_mutex);
 198
 199                 if (logic_probe_count != 0) {
 200                         _logic_data.reset(new data::Logic(
 201                                 logic_probe_count, _sample_rate));
 202                         assert(_logic_data);
 203                 }
 204
 205                 if (analog_probe_count != 0) {
 206                         _analog_data.reset(new data::Analog(_sample_rate));
 207                         assert(_analog_data);
 208                 }
 209         }
 210
 211         // Make the logic probe list
 212         {
 213                 lock_guard<mutex> lock(_signals_mutex);
 214
 215                 _signals.clear();
 216
 217                 for (const GSList *l = sdi->probes; l; l = l->next) {
 218                         const sr_probe *const probe =
 219                                 (const sr_probe *)l->data;
 220                         assert(probe);
 221                         if (!probe->enabled)
 222                                 continue;
 223
 224                         switch(probe->type) {
 225                         case SR_PROBE_LOGIC:
 226                                 signal = shared_ptr<view::Signal>(
 227                                         new view::LogicSignal(probe->name,
 228                                                 _logic_data, probe->index));
 229                                 break;
 230
 231                         case SR_PROBE_ANALOG:
 232                                 signal = shared_ptr<view::Signal>(
 233                                         new view::AnalogSignal(probe->name,
 234                                                 _analog_data));
 235                                 break;
 236                         }
 237
 238                         _signals.push_back(signal);
 239                 }
 240
 241                 signals_changed();
 242         }
 243
 244         if (sr_session_start() != SR_OK) {
 245                 qDebug() << "Failed to start session.";
 246                 return;
 247         }
 248
 249         set_capture_state(Running);
 250
 251         sr_session_run();
 252         sr_session_destroy();
 253
 254         set_capture_state(Stopped);
 255 }
 256
 257 void SigSession::feed_in_meta(const sr_dev_inst *sdi,
 258         const sr_datafeed_meta &meta)
 259 {
 260         for (const GSList *l = meta.config; l; l = l->next) {
 261                 const sr_config *const src = (const sr_config*)l->data;
 262                 switch (src->key) {
 263                 case SR_CONF_SAMPLERATE:
 264                         /// @todo handle samplerate changes
 265                         /// samplerate = (uint64_t *)src->value;
 266                         break;
 267                 default:
 268                         // Unknown metadata is not an error.
 269                         break;
 270                 }
 271         }
 272 }
 273
 274 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 275 {
 276         lock_guard<mutex> lock(_data_mutex);
 277         if (!_cur_logic_snapshot)
 278         {
 279                 assert(_logic_data);
 280
 281                 // Create a new data snapshot
 282                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 283                         new data::LogicSnapshot(logic));
 284                 _logic_data->push_snapshot(_cur_logic_snapshot);
 285         }
 286         else
 287         {
 288                 // Append to the existing data snapshot
 289                 _cur_logic_snapshot->append_payload(logic);
 290         }
 291
 292         data_updated();
 293 }
 294
 295 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 296 {
 297         lock_guard<mutex> lock(_data_mutex);
 298         if (!_cur_analog_snapshot)
 299         {
 300                 assert(_analog_data);
 301
 302                 // Create a new data snapshot
 303                 _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>(
 304                         new data::AnalogSnapshot(analog));
 305                 _analog_data->push_snapshot(_cur_analog_snapshot);
 306         }
 307         else
 308         {
 309                 // Append to the existing data snapshot
 310                 _cur_analog_snapshot->append_payload(analog);
 311         }
 312
 313         data_updated();
 314 }
 315
 316 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 317         const struct sr_datafeed_packet *packet)
 318 {
 319         assert(sdi);
 320         assert(packet);
 321
 322         switch (packet->type) {
 323         case SR_DF_HEADER:
 324                 break;
 325
 326         case SR_DF_META:
 327                 assert(packet->payload);
 328                 feed_in_meta(sdi,
 329                         *(const sr_datafeed_meta*)packet->payload);
 330                 break;
 331
 332         case SR_DF_LOGIC:
 333                 assert(packet->payload);
 334                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 335                 break;
 336
 337         case SR_DF_ANALOG:
 338                 assert(packet->payload);
 339                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 340                 break;
 341
 342         case SR_DF_END:
 343         {
 344                 {
 345                         lock_guard<mutex> lock(_data_mutex);
 346                         _cur_logic_snapshot.reset();
 347                         _cur_analog_snapshot.reset();
 348                 }
 349                 data_updated();
 350                 break;
 351         }
 352         }
 353 }
 354
 355 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 356         const struct sr_datafeed_packet *packet)
 357 {
 358         assert(_session);
 359         _session->data_feed_in(sdi, packet);
 360 }
 361
 362 } // namespace pv