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         _sampling_thread.reset(new boost::thread(
  80                 &SigSession::sample_thread_proc, this, sdi,
  81                 record_length, sample_rate));
  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, uint64_t sample_rate)
 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         // Set the samplerate
 160         if (sr_config_set(sdi, SR_CONF_SAMPLERATE,
 161                 &sample_rate) != SR_OK) {
 162                 qDebug() << "Failed to configure samplerate.";
 163                 sr_session_destroy();
 164                 return;
 165         }
 166
 167         if (sr_session_start() != SR_OK) {
 168                 qDebug() << "Failed to start session.";
 169                 return;
 170         }
 171
 172         set_capture_state(Running);
 173
 174         sr_session_run();
 175         sr_session_destroy();
 176
 177         set_capture_state(Stopped);
 178 }
 179
 180 void SigSession::feed_in_header(const sr_dev_inst *sdi)
 181 {
 182         shared_ptr<view::Signal> signal;
 183         uint64_t *sample_rate;
 184         unsigned int logic_probe_count = 0;
 185         unsigned int analog_probe_count = 0;
 186
 187         // Detect what data types we will receive
 188         for (const GSList *l = sdi->probes; l; l = l->next) {
 189                 const sr_probe *const probe = (const sr_probe *)l->data;
 190                 if (!probe->enabled)
 191                         continue;
 192
 193                 switch(probe->type) {
 194                 case SR_PROBE_LOGIC:
 195                         logic_probe_count++;
 196                         break;
 197
 198                 case SR_PROBE_ANALOG:
 199                         analog_probe_count++;
 200                         break;
 201                 }
 202         }
 203
 204         // Read out the sample rate
 205         assert(sdi->driver);
 206         assert(sr_config_get(sdi->driver, SR_CONF_SAMPLERATE,
 207                 (const void**)&sample_rate, sdi) == SR_OK);
 208
 209         // Create data containers for the coming data snapshots
 210         {
 211                 lock_guard<mutex> data_lock(_data_mutex);
 212
 213                 if (logic_probe_count != 0) {
 214                         _logic_data.reset(new data::Logic(
 215                                 logic_probe_count, *sample_rate));
 216                         assert(_logic_data);
 217                 }
 218
 219                 if (analog_probe_count != 0) {
 220                         _analog_data.reset(new data::Analog(*sample_rate));
 221                         assert(_analog_data);
 222                 }
 223         }
 224
 225         // Make the logic probe list
 226         {
 227                 lock_guard<mutex> lock(_signals_mutex);
 228
 229                 _signals.clear();
 230
 231                 for (const GSList *l = sdi->probes; l; l = l->next) {
 232                         const sr_probe *const probe =
 233                                 (const sr_probe *)l->data;
 234                         assert(probe);
 235                         if (!probe->enabled)
 236                                 continue;
 237
 238                         switch(probe->type) {
 239                         case SR_PROBE_LOGIC:
 240                                 signal = shared_ptr<view::Signal>(
 241                                         new view::LogicSignal(probe->name,
 242                                                 _logic_data, probe->index));
 243                                 break;
 244
 245                         case SR_PROBE_ANALOG:
 246                                 signal = shared_ptr<view::Signal>(
 247                                         new view::AnalogSignal(probe->name,
 248                                                 _analog_data));
 249                                 break;
 250                         }
 251
 252                         _signals.push_back(signal);
 253                 }
 254
 255                 signals_changed();
 256         }
 257 }
 258
 259 void SigSession::feed_in_meta(const sr_dev_inst *sdi,
 260         const sr_datafeed_meta &meta)
 261 {
 262         for (const GSList *l = meta.config; l; l = l->next) {
 263                 const sr_config *const src = (const sr_config*)l->data;
 264                 switch (src->key) {
 265                 case SR_CONF_SAMPLERATE:
 266                         /// @todo handle samplerate changes
 267                         /// samplerate = (uint64_t *)src->value;
 268                         break;
 269                 default:
 270                         // Unknown metadata is not an error.
 271                         break;
 272                 }
 273         }
 274 }
 275
 276 void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
 277 {
 278         lock_guard<mutex> lock(_data_mutex);
 279         if (!_cur_logic_snapshot)
 280         {
 281                 assert(_logic_data);
 282
 283                 // Create a new data snapshot
 284                 _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
 285                         new data::LogicSnapshot(logic));
 286                 _logic_data->push_snapshot(_cur_logic_snapshot);
 287         }
 288         else
 289         {
 290                 // Append to the existing data snapshot
 291                 _cur_logic_snapshot->append_payload(logic);
 292         }
 293
 294         data_updated();
 295 }
 296
 297 void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
 298 {
 299         lock_guard<mutex> lock(_data_mutex);
 300         if (!_cur_analog_snapshot)
 301         {
 302                 assert(_analog_data);
 303
 304                 // Create a new data snapshot
 305                 _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>(
 306                         new data::AnalogSnapshot(analog));
 307                 _analog_data->push_snapshot(_cur_analog_snapshot);
 308         }
 309         else
 310         {
 311                 // Append to the existing data snapshot
 312                 _cur_analog_snapshot->append_payload(analog);
 313         }
 314
 315         data_updated();
 316 }
 317
 318 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 319         const struct sr_datafeed_packet *packet)
 320 {
 321         assert(sdi);
 322         assert(packet);
 323
 324         switch (packet->type) {
 325         case SR_DF_HEADER:
 326                 feed_in_header(sdi);
 327                 break;
 328
 329         case SR_DF_META:
 330                 assert(packet->payload);
 331                 feed_in_meta(sdi,
 332                         *(const sr_datafeed_meta*)packet->payload);
 333                 break;
 334
 335         case SR_DF_LOGIC:
 336                 assert(packet->payload);
 337                 feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
 338                 break;
 339
 340         case SR_DF_ANALOG:
 341                 assert(packet->payload);
 342                 feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
 343                 break;
 344
 345         case SR_DF_END:
 346         {
 347                 {
 348                         lock_guard<mutex> lock(_data_mutex);
 349                         _cur_logic_snapshot.reset();
 350                         _cur_analog_snapshot.reset();
 351                 }
 352                 data_updated();
 353                 break;
 354         }
 355         }
 356 }
 357
 358 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 359         const struct sr_datafeed_packet *packet)
 360 {
 361         assert(_session);
 362         _session->data_feed_in(sdi, packet);
 363 }
 364
 365 } // namespace pv