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 "logicdata.h"
  24 #include "logicdatasnapshot.h"
  25 #include "view/logicsignal.h"
  26
  27 #include <QDebug>
  28
  29 #include <assert.h>
  30
  31 using namespace boost;
  32 using namespace std;
  33
  34 namespace pv {
  35
  36 // TODO: This should not be necessary
  37 SigSession* SigSession::_session = NULL;
  38
  39 SigSession::SigSession() :
  40         _capture_state(Stopped)
  41 {
  42         // TODO: This should not be necessary
  43         _session = this;
  44 }
  45
  46 SigSession::~SigSession()
  47 {
  48         stop_capture();
  49
  50         if (_sampling_thread.get())
  51                 _sampling_thread->join();
  52         _sampling_thread.reset();
  53
  54         // TODO: This should not be necessary
  55         _session = NULL;
  56 }
  57
  58 void SigSession::load_file(const string &name)
  59 {
  60         stop_capture();
  61         _sampling_thread.reset(new boost::thread(
  62                 &SigSession::load_thread_proc, this, name));
  63 }
  64
  65 SigSession::capture_state SigSession::get_capture_state() const
  66 {
  67         lock_guard<mutex> lock(_state_mutex);
  68         return _capture_state;
  69 }
  70
  71 void SigSession::start_capture(struct sr_dev_inst *sdi,
  72         uint64_t record_length, uint64_t sample_rate)
  73 {
  74         stop_capture();
  75
  76
  77         _sampling_thread.reset(new boost::thread(
  78                 &SigSession::sample_thread_proc, this, sdi,
  79                 record_length, sample_rate));
  80 }
  81
  82 void SigSession::stop_capture()
  83 {
  84         if (get_capture_state() == Stopped)
  85                 return;
  86
  87         sr_session_stop();
  88
  89         // Check that sampling stopped
  90         if (_sampling_thread.get())
  91                 _sampling_thread->join();
  92         _sampling_thread.reset();
  93 }
  94
  95 vector< shared_ptr<view::Signal> > SigSession::get_signals()
  96 {
  97         lock_guard<mutex> lock(_signals_mutex);
  98         return _signals;
  99 }
 100
 101 boost::shared_ptr<LogicData> SigSession::get_data()
 102 {
 103         return _logic_data;
 104 }
 105
 106 void SigSession::set_capture_state(capture_state state)
 107 {
 108         lock_guard<mutex> lock(_state_mutex);
 109         _capture_state = state;
 110         capture_state_changed(state);
 111 }
 112
 113 void SigSession::load_thread_proc(const string name)
 114 {
 115         if (sr_session_load(name.c_str()) != SR_OK) {
 116                 qDebug() << "Failed to load file.";
 117                 return;
 118         }
 119
 120         sr_session_datafeed_callback_add(data_feed_in_proc);
 121
 122         if (sr_session_start() != SR_OK) {
 123                 qDebug() << "Failed to start session.";
 124                 return;
 125         }
 126
 127         set_capture_state(Running);
 128
 129         sr_session_run();
 130         sr_session_stop();
 131
 132         set_capture_state(Stopped);
 133 }
 134
 135 void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
 136         uint64_t record_length, uint64_t sample_rate)
 137 {
 138         sr_session_new();
 139         sr_session_datafeed_callback_add(data_feed_in_proc);
 140
 141         if (sr_session_dev_add(sdi) != SR_OK) {
 142                 qDebug() << "Failed to use device.";
 143                 sr_session_destroy();
 144                 return;
 145         }
 146
 147         if (sr_dev_config_set(sdi, SR_HWCAP_LIMIT_SAMPLES,
 148                 &record_length) != SR_OK) {
 149                 qDebug() << "Failed to configure time-based sample limit.";
 150                 sr_session_destroy();
 151                 return;
 152         }
 153
 154         if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 155                 &sample_rate) != SR_OK) {
 156                 qDebug() << "Failed to configure samplerate.";
 157                 sr_session_destroy();
 158                 return;
 159         }
 160
 161         if (sr_session_start() != SR_OK) {
 162                 qDebug() << "Failed to start session.";
 163                 return;
 164         }
 165
 166         set_capture_state(Running);
 167
 168         sr_session_run();
 169         sr_session_destroy();
 170
 171         set_capture_state(Stopped);
 172 }
 173
 174 void SigSession::feed_in_meta_logic(const struct sr_dev_inst *sdi,
 175         const sr_datafeed_meta_logic &meta_logic)
 176 {
 177         using view::LogicSignal;
 178
 179         {
 180                 lock_guard<mutex> lock(_data_mutex);
 181
 182                 // Create an empty LogicData for coming data snapshots
 183                 _logic_data.reset(new LogicData(meta_logic));
 184                 assert(_logic_data);
 185                 if (!_logic_data)
 186                         return;
 187         }
 188
 189         {
 190                 lock_guard<mutex> lock(_signals_mutex);
 191
 192                 // Add the signals
 193                 for (int i = 0; i < meta_logic.num_probes; i++) {
 194                         const sr_probe *const probe =
 195                                 (const sr_probe*)g_slist_nth_data(
 196                                         sdi->probes, i);
 197                         if (probe->enabled) {
 198                                 shared_ptr<LogicSignal> signal(
 199                                         new LogicSignal(probe->name,
 200                                                 _logic_data, probe->index));
 201                                 _signals.push_back(signal);
 202                         }
 203                 }
 204
 205                 signals_changed();
 206         }
 207 }
 208
 209 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 210         const struct sr_datafeed_packet *packet)
 211 {
 212         assert(sdi);
 213         assert(packet);
 214
 215         switch (packet->type) {
 216         case SR_DF_HEADER:
 217         {
 218                 lock_guard<mutex> lock(_signals_mutex);
 219                 _signals.clear();
 220                 break;
 221         }
 222
 223         case SR_DF_META_LOGIC:
 224                 assert(packet->payload);
 225                 feed_in_meta_logic(sdi,
 226                         *(const sr_datafeed_meta_logic*)packet->payload);
 227                 break;
 228
 229         case SR_DF_LOGIC:
 230         {
 231                 lock_guard<mutex> lock(_data_mutex);
 232                 assert(packet->payload);
 233                 if (!_cur_logic_snapshot)
 234                 {
 235                         // Create a new data snapshot
 236                         _cur_logic_snapshot = shared_ptr<LogicDataSnapshot>(
 237                                 new LogicDataSnapshot(
 238                                 *(sr_datafeed_logic*)packet->payload));
 239                         _logic_data->push_snapshot(_cur_logic_snapshot);
 240                 }
 241                 else
 242                 {
 243                         // Append to the existing data snapshot
 244                         _cur_logic_snapshot->append_payload(
 245                                 *(sr_datafeed_logic*)packet->payload);
 246                 }
 247
 248                 data_updated();
 249                 break;
 250         }
 251
 252         case SR_DF_END:
 253         {
 254                 {
 255                         lock_guard<mutex> lock(_data_mutex);
 256                         _cur_logic_snapshot.reset();
 257                 }
 258                 data_updated();
 259                 break;
 260         }
 261         }
 262 }
 263
 264 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 265         const struct sr_datafeed_packet *packet)
 266 {
 267         assert(_session);
 268         _session->data_feed_in(sdi, packet);
 269 }
 270
 271 } // namespace pv