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         assert(sr_config_get(sdi->driver, SR_CONF_SAMPLERATE,
 199                 (const void**)&sample_rate, sdi) == SR_OK);
 200
 201         // Create data containers for the coming data snapshots
 202         {
 203                 lock_guard<mutex> data_lock(_data_mutex);
 204
 205                 if (logic_probe_count != 0) {
 206                         _logic_data.reset(new data::Logic(
 207                                 logic_probe_count, *sample_rate));
 208                         assert(_logic_data);
 209                 }
 210
 211                 if (analog_probe_count != 0) {
 212                         _analog_data.reset(new data::Analog(*sample_rate));
 213                         assert(_analog_data);
 214                 }
 215         }
 216
 217         // Make the logic probe list
 218         {
 219                 lock_guard<mutex> lock(_signals_mutex);
 220
 221                 _signals.clear();
 222
 223                 for (const GSList *l = sdi->probes; l; l = l->next) {
 224                         const sr_probe *const probe =
 225                                 (const sr_probe *)l->data;
 226                         assert(probe);
 227                         if (!probe->enabled)
 228                                 continue;
 229
 230                         switch(probe->type) {
 231                         case SR_PROBE_LOGIC:
 232                                 signal = shared_ptr<view::Signal>(
 233                                         new view::LogicSignal(probe->name,
 234                                                 _logic_data, probe->index));
 235                                 break;
 236
 237                         case SR_PROBE_ANALOG:
 238                                 signal = shared_ptr<view::Signal>(
 239                                         new view::AnalogSignal(probe->name,
 240                                                 _analog_data));
 241                                 break;
 242                         }
 243
 244                         _signals.push_back(signal);
 245                 }
 246
 247                 signals_changed();
 248         }
 249 }
 250
 251 void SigSession::feed_in_meta(const sr_dev_inst *sdi,
 252         const sr_datafeed_meta &meta)
 253 {
 254         (void)sdi;
 255
 256         for (const GSList *l = meta.config; l; l = l->next) {
 257                 const sr_config *const src = (const sr_config*)l->data;
 258                 switch (src->key) {
 259                 case SR_CONF_SAMPLERATE:
 260                         /// @todo handle samplerate changes
 261                         /// samplerate = (uint64_t *)src->value;
 262                         break;
 263                 default:
 264                         // Unknown metadata is not an error.
 265                         break;
 266                 }
 267         }
 268 }
 269
 270 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 271 {
 272         lock_guard<mutex> lock(_data_mutex);
 273         if (!_cur_logic_snapshot)
 274         {
 275                 assert(_logic_data);
 276
 277                 // Create a new data snapshot
 278                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 279                         new data::LogicSnapshot(logic));
 280                 _logic_data->push_snapshot(_cur_logic_snapshot);
 281         }
 282         else
 283         {
 284                 // Append to the existing data snapshot
 285                 _cur_logic_snapshot->append_payload(logic);
 286         }
 287
 288         data_updated();
 289 }
 290
 291 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 292 {
 293         lock_guard<mutex> lock(_data_mutex);
 294         if (!_cur_analog_snapshot)
 295         {
 296                 assert(_analog_data);
 297
 298                 // Create a new data snapshot
 299                 _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>(
 300                         new data::AnalogSnapshot(analog));
 301                 _analog_data->push_snapshot(_cur_analog_snapshot);
 302         }
 303         else
 304         {
 305                 // Append to the existing data snapshot
 306                 _cur_analog_snapshot->append_payload(analog);
 307         }
 308
 309         data_updated();
 310 }
 311
 312 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 313         const struct sr_datafeed_packet *packet)
 314 {
 315         assert(sdi);
 316         assert(packet);
 317
 318         switch (packet->type) {
 319         case SR_DF_HEADER:
 320                 feed_in_header(sdi);
 321                 break;
 322
 323         case SR_DF_META:
 324                 assert(packet->payload);
 325                 feed_in_meta(sdi,
 326                         *(const sr_datafeed_meta*)packet->payload);
 327                 break;
 328
 329         case SR_DF_LOGIC:
 330                 assert(packet->payload);
 331                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 332                 break;
 333
 334         case SR_DF_ANALOG:
 335                 assert(packet->payload);
 336                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 337                 break;
 338
 339         case SR_DF_END:
 340         {
 341                 {
 342                         lock_guard<mutex> lock(_data_mutex);
 343                         _cur_logic_snapshot.reset();
 344                         _cur_analog_snapshot.reset();
 345                 }
 346                 data_updated();
 347                 break;
 348         }
 349         }
 350 }
 351
 352 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 353         const struct sr_datafeed_packet *packet)
 354 {
 355         assert(_session);
 356         _session->data_feed_in(sdi, packet);
 357 }
 358
 359 } // namespace pv