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 {
  41         // TODO: This should not be necessary
  42         _session = this;
  43 }
  44
  45 SigSession::~SigSession()
  46 {
  47         if(_sampling_thread.get())
  48                 _sampling_thread->join();
  49         _sampling_thread.reset();
  50
  51         // TODO: This should not be necessary
  52         _session = NULL;
  53 }
  54
  55 void SigSession::load_file(const std::string &name)
  56 {
  57         if (sr_session_load(name.c_str()) == SR_OK) {
  58                 /* sigrok session file */
  59                 sr_session_datafeed_callback_add(data_feed_in_proc);
  60                 sr_session_start();
  61                 sr_session_run();
  62                 sr_session_stop();
  63         }
  64 }
  65
  66 void SigSession::start_capture(struct sr_dev_inst *sdi,
  67         uint64_t record_length, uint64_t sample_rate)
  68 {
  69         // Check sampling isn't already active
  70         if(_sampling_thread.get())
  71                 _sampling_thread->join();
  72
  73         _sampling_thread.reset(new boost::thread(
  74                 &SigSession::sample_thread_proc, this, sdi,
  75                 record_length, sample_rate));
  76 }
  77
  78 vector< shared_ptr<view::Signal> > SigSession::get_signals()
  79 {
  80         lock_guard<mutex> lock(_signals_mutex);
  81         return _signals;
  82 }
  83
  84 boost::shared_ptr<LogicData> SigSession::get_data()
  85 {
  86         return _logic_data;
  87 }
  88
  89 void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
  90         uint64_t record_length, uint64_t sample_rate)
  91 {
  92         sr_session_new();
  93         sr_session_datafeed_callback_add(data_feed_in_proc);
  94
  95         if (sr_session_dev_add(sdi) != SR_OK) {
  96                 qDebug() << "Failed to use device.";
  97                 sr_session_destroy();
  98                 return;
  99         }
 100
 101         if (sr_dev_config_set(sdi, SR_HWCAP_LIMIT_SAMPLES,
 102                 &record_length) != SR_OK) {
 103                 qDebug() << "Failed to configure time-based sample limit.";
 104                 sr_session_destroy();
 105                 return;
 106         }
 107
 108         if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 109                 &sample_rate) != SR_OK) {
 110                 qDebug() << "Failed to configure samplerate.";
 111                 sr_session_destroy();
 112                 return;
 113         }
 114
 115         if (sr_session_start() != SR_OK) {
 116                 qDebug() << "Failed to start session.";
 117                 return;
 118         }
 119
 120         sr_session_run();
 121         sr_session_destroy();
 122 }
 123
 124 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 125         struct sr_datafeed_packet *packet)
 126 {
 127         using view::LogicSignal;
 128
 129         assert(sdi);
 130         assert(packet);
 131
 132         switch (packet->type) {
 133         case SR_DF_HEADER:
 134         {
 135                 lock_guard<mutex> lock(_signals_mutex);
 136                 _signals.clear();
 137                 break;
 138         }
 139
 140         case SR_DF_META_LOGIC:
 141         {
 142                 assert(packet->payload);
 143                 const sr_datafeed_meta_logic &meta_logic =
 144                         *(sr_datafeed_meta_logic*)packet->payload;
 145
 146         {
 147                 lock_guard<mutex> lock(_data_mutex);
 148
 149                 // Create an empty LogiData for coming data snapshots
 150                 _logic_data.reset(new LogicData(meta_logic));
 151                 assert(_logic_data);
 152                 if(!_logic_data)
 153                         break;
 154         }
 155
 156         {
 157                 lock_guard<mutex> lock(_signals_mutex);
 158
 159                 // Add the signals
 160                 for (int i = 0; i < meta_logic.num_probes; i++)
 161                 {
 162                         const sr_probe *const probe =
 163                                 (const sr_probe*)g_slist_nth_data(
 164                                         sdi->probes, i);
 165                         if(probe->enabled)
 166                         {
 167                                 shared_ptr<LogicSignal> signal(
 168                                         new LogicSignal(probe->name,
 169                                                 _logic_data,
 170                                                 probe->index));
 171                                 _signals.push_back(signal);
 172                         }
 173                 }
 174
 175                 signals_changed();
 176                 break;
 177         }
 178         }
 179
 180         case SR_DF_LOGIC:
 181         {
 182                 lock_guard<mutex> lock(_data_mutex);
 183                 assert(packet->payload);
 184                 if(!_cur_logic_snapshot)
 185                 {
 186                         // Create a new data snapshot
 187                         _cur_logic_snapshot = shared_ptr<LogicDataSnapshot>(
 188                                 new LogicDataSnapshot(
 189                                 *(sr_datafeed_logic*)packet->payload));
 190                         _logic_data->push_snapshot(_cur_logic_snapshot);
 191                 }
 192                 else
 193                 {
 194                         // Append to the existing data snapshot
 195                         _cur_logic_snapshot->append_payload(
 196                                 *(sr_datafeed_logic*)packet->payload);
 197                 }
 198
 199                 break;
 200         }
 201
 202         case SR_DF_END:
 203         {
 204                 {
 205                         lock_guard<mutex> lock(_data_mutex);
 206                         _cur_logic_snapshot.reset();
 207                 }
 208                 data_updated();
 209                 break;
 210         }
 211         }
 212 }
 213
 214 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 215         struct sr_datafeed_packet *packet)
 216 {
 217         assert(_session);
 218         _session->data_feed_in(sdi, packet);
 219 }
 220
 221 } // namespace pv