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 std::string &name)
  59 {
  60         if (sr_session_load(name.c_str()) == SR_OK) {
  61                 /* sigrok session file */
  62                 sr_session_datafeed_callback_add(data_feed_in_proc);
  63                 sr_session_start();
  64                 sr_session_run();
  65                 sr_session_stop();
  66         }
  67 }
  68
  69 SigSession::capture_state SigSession::get_capture_state() const
  70 {
  71         lock_guard<mutex> lock(_state_mutex);
  72         return _capture_state;
  73 }
  74
  75 void SigSession::start_capture(struct sr_dev_inst *sdi,
  76         uint64_t record_length, uint64_t sample_rate)
  77 {
  78         stop_capture();
  79
  80
  81         _sampling_thread.reset(new boost::thread(
  82                 &SigSession::sample_thread_proc, this, sdi,
  83                 record_length, sample_rate));
  84 }
  85
  86 void SigSession::stop_capture()
  87 {
  88         if(get_capture_state() == Stopped)
  89                 return;
  90
  91         sr_session_stop();
  92
  93         // Check that sampling stopped
  94         if(_sampling_thread.get())
  95                 _sampling_thread->join();
  96         _sampling_thread.reset();
  97
  98         _capture_state = Stopped;
  99 }
 100
 101 vector< shared_ptr<view::Signal> > SigSession::get_signals()
 102 {
 103         lock_guard<mutex> lock(_signals_mutex);
 104         return _signals;
 105 }
 106
 107 boost::shared_ptr<LogicData> SigSession::get_data()
 108 {
 109         return _logic_data;
 110 }
 111
 112 void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
 113         uint64_t record_length, uint64_t sample_rate)
 114 {
 115         sr_session_new();
 116         sr_session_datafeed_callback_add(data_feed_in_proc);
 117
 118         if (sr_session_dev_add(sdi) != SR_OK) {
 119                 qDebug() << "Failed to use device.";
 120                 sr_session_destroy();
 121                 return;
 122         }
 123
 124         if (sr_dev_config_set(sdi, SR_HWCAP_LIMIT_SAMPLES,
 125                 &record_length) != SR_OK) {
 126                 qDebug() << "Failed to configure time-based sample limit.";
 127                 sr_session_destroy();
 128                 return;
 129         }
 130
 131         if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 132                 &sample_rate) != SR_OK) {
 133                 qDebug() << "Failed to configure samplerate.";
 134                 sr_session_destroy();
 135                 return;
 136         }
 137
 138         if (sr_session_start() != SR_OK) {
 139                 qDebug() << "Failed to start session.";
 140                 return;
 141         }
 142
 143         {
 144                 lock_guard<mutex> lock(_state_mutex);
 145                 _capture_state = Running;
 146         }
 147
 148         sr_session_run();
 149         sr_session_destroy();
 150 }
 151
 152 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 153         struct sr_datafeed_packet *packet)
 154 {
 155         using view::LogicSignal;
 156
 157         assert(sdi);
 158         assert(packet);
 159
 160         switch (packet->type) {
 161         case SR_DF_HEADER:
 162         {
 163                 lock_guard<mutex> lock(_signals_mutex);
 164                 _signals.clear();
 165                 break;
 166         }
 167
 168         case SR_DF_META_LOGIC:
 169         {
 170                 assert(packet->payload);
 171                 const sr_datafeed_meta_logic &meta_logic =
 172                         *(sr_datafeed_meta_logic*)packet->payload;
 173
 174         {
 175                 lock_guard<mutex> lock(_data_mutex);
 176
 177                 // Create an empty LogiData for coming data snapshots
 178                 _logic_data.reset(new LogicData(meta_logic));
 179                 assert(_logic_data);
 180                 if(!_logic_data)
 181                         break;
 182         }
 183
 184         {
 185                 lock_guard<mutex> lock(_signals_mutex);
 186
 187                 // Add the signals
 188                 for (int i = 0; i < meta_logic.num_probes; i++)
 189                 {
 190                         const sr_probe *const probe =
 191                                 (const sr_probe*)g_slist_nth_data(
 192                                         sdi->probes, i);
 193                         if(probe->enabled)
 194                         {
 195                                 shared_ptr<LogicSignal> signal(
 196                                         new LogicSignal(probe->name,
 197                                                 _logic_data,
 198                                                 probe->index));
 199                                 _signals.push_back(signal);
 200                         }
 201                 }
 202
 203                 signals_changed();
 204                 break;
 205         }
 206         }
 207
 208         case SR_DF_LOGIC:
 209         {
 210                 lock_guard<mutex> lock(_data_mutex);
 211                 assert(packet->payload);
 212                 if(!_cur_logic_snapshot)
 213                 {
 214                         // Create a new data snapshot
 215                         _cur_logic_snapshot = shared_ptr<LogicDataSnapshot>(
 216                                 new LogicDataSnapshot(
 217                                 *(sr_datafeed_logic*)packet->payload));
 218                         _logic_data->push_snapshot(_cur_logic_snapshot);
 219                 }
 220                 else
 221                 {
 222                         // Append to the existing data snapshot
 223                         _cur_logic_snapshot->append_payload(
 224                                 *(sr_datafeed_logic*)packet->payload);
 225                 }
 226
 227                 data_updated();
 228                 break;
 229         }
 230
 231         case SR_DF_END:
 232         {
 233                 {
 234                         lock_guard<mutex> lock(_data_mutex);
 235                         _cur_logic_snapshot.reset();
 236                 }
 237                 data_updated();
 238                 break;
 239         }
 240         }
 241 }
 242
 243 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 244         struct sr_datafeed_packet *packet)
 245 {
 246         assert(_session);
 247         _session->data_feed_in(sdi, packet);
 248 }
 249
 250 } // namespace pv