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         return _signals;
  81 }
  82
  83 boost::shared_ptr<LogicData> SigSession::get_data()
  84 {
  85         return _logic_data;
  86 }
  87
  88 void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
  89         uint64_t record_length, uint64_t sample_rate)
  90 {
  91         sr_session_new();
  92         sr_session_datafeed_callback_add(data_feed_in_proc);
  93
  94         if (sr_session_dev_add(sdi) != SR_OK) {
  95                 qDebug() << "Failed to use device.";
  96                 sr_session_destroy();
  97                 return;
  98         }
  99
 100         if (sr_dev_config_set(sdi, SR_HWCAP_LIMIT_SAMPLES,
 101                 &record_length) != SR_OK) {
 102                 qDebug() << "Failed to configure time-based sample limit.";
 103                 sr_session_destroy();
 104                 return;
 105         }
 106
 107         if (sr_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 108                 &sample_rate) != SR_OK) {
 109                 qDebug() << "Failed to configure samplerate.";
 110                 sr_session_destroy();
 111                 return;
 112         }
 113
 114         if (sr_session_start() != SR_OK) {
 115                 qDebug() << "Failed to start session.";
 116                 return;
 117         }
 118
 119         sr_session_run();
 120         sr_session_destroy();
 121 }
 122
 123 void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
 124         struct sr_datafeed_packet *packet)
 125 {
 126         using view::LogicSignal;
 127
 128         assert(sdi);
 129         assert(packet);
 130
 131         switch (packet->type) {
 132         case SR_DF_HEADER:
 133         {
 134                 lock_guard<mutex> lock(_data_mutex);
 135                 _signals.clear();
 136                 break;
 137         }
 138
 139         case SR_DF_META_LOGIC:
 140         {
 141                 assert(packet->payload);
 142
 143                 lock_guard<mutex> lock(_data_mutex);
 144
 145                 const sr_datafeed_meta_logic &meta_logic =
 146                         *(sr_datafeed_meta_logic*)packet->payload;
 147
 148                 // Create an empty LogiData for coming data snapshots
 149                 _logic_data.reset(new LogicData(meta_logic));
 150                 assert(_logic_data);
 151                 if(!_logic_data)
 152                         break;
 153
 154                 // Add the signals
 155                 for (int i = 0; i < meta_logic.num_probes; i++)
 156                 {
 157                         const sr_probe *const probe =
 158                                 (const sr_probe*)g_slist_nth_data(
 159                                         sdi->probes, i);
 160                         if(probe->enabled)
 161                         {
 162                                 shared_ptr<LogicSignal> signal(
 163                                         new LogicSignal(probe->name,
 164                                                 _logic_data,
 165                                                 probe->index));
 166                                 _signals.push_back(signal);
 167                         }
 168                 }
 169
 170                 break;
 171         }
 172
 173         case SR_DF_LOGIC:
 174         {
 175                 lock_guard<mutex> lock(_data_mutex);
 176                 assert(packet->payload);
 177                 if(!_cur_logic_snapshot)
 178                 {
 179                         // Create a new data snapshot
 180                         _cur_logic_snapshot = shared_ptr<LogicDataSnapshot>(
 181                                 new LogicDataSnapshot(
 182                                 *(sr_datafeed_logic*)packet->payload));
 183                         _logic_data->push_snapshot(_cur_logic_snapshot);
 184                 }
 185                 else
 186                 {
 187                         // Append to the existing data snapshot
 188                         _cur_logic_snapshot->append_payload(
 189                                 *(sr_datafeed_logic*)packet->payload);
 190                 }
 191
 192                 break;
 193         }
 194
 195         case SR_DF_END:
 196         {
 197                 {
 198                         lock_guard<mutex> lock(_data_mutex);
 199                         _cur_logic_snapshot.reset();
 200                 }
 201                 data_updated();
 202                 break;
 203         }
 204         }
 205 }
 206
 207 void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
 208         struct sr_datafeed_packet *packet)
 209 {
 210         assert(_session);
 211         _session->data_feed_in(sdi, packet);
 212 }
 213
 214 } // namespace pv