sigsession.cpp

   1 /*
   2  * This file is part of the sigrok 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 "logicsignal.h"
  26
  27 #include <QDebug>
  28
  29 #include <assert.h>
  30
  31 using namespace boost;
  32 using namespace std;
  33
  34 // TODO: This should not be necessary
  35 SigSession* SigSession::_session = NULL;
  36
  37 SigSession::SigSession()
  38 {
  39         // TODO: This should not be necessary
  40         _session = this;
  41 }
  42
  43 SigSession::~SigSession()
  44 {
  45         // TODO: This should not be necessary
  46         _session = NULL;
  47 }
  48
  49 void SigSession::load_file(const std::string &name)
  50 {
  51         if (sr_session_load(name.c_str()) == SR_OK) {
  52                 /* sigrok session file */
  53                 sr_session_datafeed_callback_add(data_feed_in_proc);
  54                 sr_session_start();
  55                 sr_session_run();
  56                 sr_session_stop();
  57         }
  58 }
  59
  60 void SigSession::start_capture(struct sr_dev_inst *sdi,
  61         uint64_t record_length, uint64_t sample_rate)
  62 {
  63         sr_session_new();
  64         sr_session_datafeed_callback_add(data_feed_in_proc);
  65
  66         if (sr_session_dev_add(sdi) != SR_OK) {
  67                 qDebug() << "Failed to use device.";
  68                 sr_session_destroy();
  69                 return;
  70         }
  71
  72         if (sr_dev_config_set(sdi, SR_HWCAP_LIMIT_SAMPLES,
  73                 &record_length) != SR_OK) {
  74                 qDebug() << "Failed to configure time-based sample limit.";
  75                 sr_session_destroy();
  76                 return;
  77         }
  78
  79         if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
  80                 &sample_rate) != SR_OK) {
  81                 qDebug() << "Failed to configure samplerate.";
  82                 sr_session_destroy();
  83                 return;
  84         }
  85
  86         if (sr_session_start() != SR_OK) {
  87                 qDebug() << "Failed to start session.";
  88                 return;
  89         }
  90
  91         sr_session_run();
  92         sr_session_destroy();
  93 }
  94
  95 vector< shared_ptr<Signal> >& SigSession::get_signals()
  96 {
  97         return _signals;
  98 }
  99
 100 boost::shared_ptr<LogicData> SigSession::get_data()
 101 {
 102         return _logic_data;
 103 }
 104
 105 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 106         struct sr_datafeed_packet *packet)
 107 {
 108         assert(sdi);
 109         assert(packet);
 110
 111         switch (packet->type) {
 112         case SR_DF_HEADER:
 113                 _signals.clear();
 114                 break;
 115
 116         case SR_DF_META_LOGIC:
 117                 {
 118                         assert(packet->payload);
 119
 120                         const sr_datafeed_meta_logic &meta_logic =
 121                                 *(sr_datafeed_meta_logic*)packet->payload;
 122
 123                         // Create an empty LogiData for coming data snapshots
 124                         _logic_data.reset(new LogicData(meta_logic));
 125                         assert(_logic_data);
 126                         if(!_logic_data)
 127                                 break;
 128
 129                         // Add the signals
 130                         for (int i = 0; i < meta_logic.num_probes; i++)
 131                         {
 132                                 const sr_probe *const probe =
 133                                         (const sr_probe*)g_slist_nth_data(
 134                                                 sdi->probes, i);
 135                                 if(probe->enabled)
 136                                 {
 137                                         boost::shared_ptr<LogicSignal> signal(
 138                                                 new LogicSignal(probe->name,
 139                                                         _logic_data,
 140                                                         probe->index));
 141                                         _signals.push_back(signal);
 142                                 }
 143                         }
 144
 145                         break;
 146                 }
 147
 148         case SR_DF_LOGIC:
 149
 150                 assert(packet->payload);
 151                 if(!_cur_logic_snapshot)
 152                 {
 153                         // Create a new data snapshot
 154                         _cur_logic_snapshot = shared_ptr<LogicDataSnapshot>(
 155                                 new LogicDataSnapshot(
 156                                 *(sr_datafeed_logic*)packet->payload));
 157                         _logic_data->push_snapshot(_cur_logic_snapshot);
 158                 }
 159                 else
 160                 {
 161                         // Append to the existing data snapshot
 162                         _cur_logic_snapshot->append_payload(
 163                                 *(sr_datafeed_logic*)packet->payload);
 164                 }
 165
 166                 break;
 167
 168         case SR_DF_END:
 169                 _cur_logic_snapshot.reset();
 170                 data_updated();
 171                 break;
 172         }
 173 }
 174
 175 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 176         struct sr_datafeed_packet *packet)
 177 {
 178         assert(_session);
 179         _session->data_feed_in(sdi, packet);
 180 }