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         sr_session_new();
 144         sr_session_datafeed_callback_add(data_feed_in_proc);
 145
 146         if (sr_session_dev_add(sdi) != SR_OK) {
 147                 qDebug() << "Failed to use device.";
 148                 sr_session_destroy();
 149                 return;
 150         }
 151
 152         if (sr_dev_config_set(sdi, SR_HWCAP_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         {
 160                 lock_guard<mutex> lock(_sampling_mutex);
 161                 if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 162                         &_sample_rate) != SR_OK) {
 163                         qDebug() << "Failed to configure samplerate.";
 164                         sr_session_destroy();
 165                         return;
 166                 }
 167         }
 168
 169         if (sr_session_start() != SR_OK) {
 170                 qDebug() << "Failed to start session.";
 171                 return;
 172         }
 173
 174         set_capture_state(Running);
 175
 176         sr_session_run();
 177         sr_session_destroy();
 178
 179         set_capture_state(Stopped);
 180 }
 181
 182 void SigSession::feed_in_meta_logic(const struct sr_dev_inst *sdi,
 183         const sr_datafeed_meta_logic &meta_logic)
 184 {
 185         using view::LogicSignal;
 186
 187         {
 188                 lock_guard<mutex> data_lock(_data_mutex);
 189                 lock_guard<mutex> sampling_lock(_sampling_mutex);
 190
 191                 // Create an empty data::Logic for coming data snapshots
 192                 _logic_data.reset(new data::Logic(meta_logic, _sample_rate));
 193                 assert(_logic_data);
 194                 if (!_logic_data)
 195                         return;
 196         }
 197
 198         {
 199                 lock_guard<mutex> lock(_signals_mutex);
 200
 201                 // Add the signals
 202                 for (int i = 0; i < meta_logic.num_probes; i++) {
 203                         const sr_probe *const probe =
 204                                 (const sr_probe*)g_slist_nth_data(
 205                                         sdi->probes, i);
 206                         if (probe->enabled) {
 207                                 shared_ptr<LogicSignal> signal(
 208                                         new LogicSignal(probe->name,
 209                                                 _logic_data, probe->index));
 210                                 _signals.push_back(signal);
 211                         }
 212                 }
 213
 214                 signals_changed();
 215         }
 216 }
 217
 218 void SigSession::feed_in_meta_analog(const struct sr_dev_inst*,
 219         const sr_datafeed_meta_analog &meta_analog)
 220 {
 221         using view::AnalogSignal;
 222
 223         {
 224                 lock_guard<mutex> data_lock(_data_mutex);
 225                 lock_guard<mutex> sampling_lock(_sampling_mutex);
 226
 227                 // Create an empty data::Analog for coming data snapshots
 228                 _analog_data.reset(new data::Analog(
 229                         meta_analog, _sample_rate));
 230                 assert(_analog_data);
 231                 if (!_analog_data)
 232                         return;
 233         }
 234
 235         {
 236                 lock_guard<mutex> lock(_signals_mutex);
 237
 238                 // Add the signals
 239                 shared_ptr<AnalogSignal> signal(
 240                         new AnalogSignal(QString("???"), _analog_data));
 241                 _signals.push_back(signal);
 242
 243                 signals_changed();
 244         }
 245 }
 246
 247 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 248 {
 249         lock_guard<mutex> lock(_data_mutex);
 250         if (!_cur_logic_snapshot)
 251         {
 252                 // Create a new data snapshot
 253                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 254                         new data::LogicSnapshot(logic));
 255                 _logic_data->push_snapshot(_cur_logic_snapshot);
 256         }
 257         else
 258         {
 259                 // Append to the existing data snapshot
 260                 _cur_logic_snapshot->append_payload(logic);
 261         }
 262
 263         data_updated();
 264 }
 265
 266 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 267 {
 268         lock_guard<mutex> lock(_data_mutex);
 269         if (!_cur_analog_snapshot)
 270         {
 271                 // Create a new data snapshot
 272                 _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>(
 273                         new data::AnalogSnapshot(analog));
 274                 _analog_data->push_snapshot(_cur_analog_snapshot);
 275         }
 276         else
 277         {
 278                 // Append to the existing data snapshot
 279                 _cur_analog_snapshot->append_payload(analog);
 280         }
 281
 282         data_updated();
 283 }
 284
 285 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 286         const struct sr_datafeed_packet *packet)
 287 {
 288         assert(sdi);
 289         assert(packet);
 290
 291         switch (packet->type) {
 292         case SR_DF_HEADER:
 293         {
 294                 lock_guard<mutex> lock(_signals_mutex);
 295                 _signals.clear();
 296                 break;
 297         }
 298
 299         case SR_DF_META_LOGIC:
 300                 assert(packet->payload);
 301                 feed_in_meta_logic(sdi,
 302                         *(const sr_datafeed_meta_logic*)packet->payload);
 303                 break;
 304
 305         case SR_DF_META_ANALOG:
 306                 assert(packet->payload);
 307                 feed_in_meta_analog(sdi,
 308                         *(const sr_datafeed_meta_analog*)packet->payload);
 309                 break;
 310
 311         case SR_DF_LOGIC:
 312                 assert(packet->payload);
 313                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 314                 break;
 315
 316         case SR_DF_ANALOG:
 317                 assert(packet->payload);
 318                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 319                 break;
 320
 321         case SR_DF_END:
 322         {
 323                 {
 324                         lock_guard<mutex> lock(_data_mutex);
 325                         _cur_logic_snapshot.reset();
 326                         _cur_analog_snapshot.reset();
 327                 }
 328                 data_updated();
 329                 break;
 330         }
 331         }
 332 }
 333
 334 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 335         const struct sr_datafeed_packet *packet)
 336 {
 337         assert(_session);
 338         _session->data_feed_in(sdi, packet);
 339 }
 340
 341 } // namespace pv