pv/storesession.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2014 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <cassert>
  21
  22 #include "storesession.hpp"
  23
  24 #include <pv/data/analog.hpp>
  25 #include <pv/data/analogsegment.hpp>
  26 #include <pv/data/logic.hpp>
  27 #include <pv/data/logicsegment.hpp>
  28 #include <pv/data/signalbase.hpp>
  29 #include <pv/devicemanager.hpp>
  30 #include <pv/devices/device.hpp>
  31 #include <pv/session.hpp>
  32
  33 #include <libsigrokcxx/libsigrokcxx.hpp>
  34
  35 using std::deque;
  36 using std::ios_base;
  37 using std::lock_guard;
  38 using std::make_pair;
  39 using std::map;
  40 using std::min;
  41 using std::mutex;
  42 using std::pair;
  43 using std::shared_ptr;
  44 using std::string;
  45 using std::unordered_set;
  46 using std::vector;
  47
  48 using Glib::VariantBase;
  49
  50 using sigrok::ConfigKey;
  51 using sigrok::Error;
  52 using sigrok::OutputFormat;
  53 using sigrok::OutputFlag;
  54
  55 namespace pv {
  56
  57 const size_t StoreSession::BlockSize = 10 * 1024 * 1024;
  58
  59 StoreSession::StoreSession(const string &file_name,
  60         const shared_ptr<OutputFormat> &output_format,
  61         const map<string, VariantBase> &options,
  62         const pair<uint64_t, uint64_t> sample_range,
  63         const Session &session) :
  64         file_name_(file_name),
  65         output_format_(output_format),
  66         options_(options),
  67         sample_range_(sample_range),
  68         session_(session),
  69         interrupt_(false),
  70         units_stored_(0),
  71         unit_count_(0)
  72 {
  73 }
  74
  75 StoreSession::~StoreSession()
  76 {
  77         wait();
  78 }
  79
  80 pair<int, int> StoreSession::progress() const
  81 {
  82         return make_pair(units_stored_.load(), unit_count_.load());
  83 }
  84
  85 const QString& StoreSession::error() const
  86 {
  87         lock_guard<mutex> lock(mutex_);
  88         return error_;
  89 }
  90
  91 bool StoreSession::start()
  92 {
  93         const unordered_set< shared_ptr<data::SignalBase> > sigs(session_.signalbases());
  94
  95         shared_ptr<data::Segment> any_segment;
  96         shared_ptr<data::LogicSegment> lsegment;
  97         vector< shared_ptr<data::SignalBase> > achannel_list;
  98         vector< shared_ptr<data::AnalogSegment> > asegment_list;
  99
 100         for (shared_ptr<data::SignalBase> signal : sigs) {
 101                 if (!signal->enabled())
 102                         continue;
 103
 104                 if (signal->type() == data::SignalBase::LogicChannel) {
 105                         // All logic channels share the same data segments
 106                         shared_ptr<data::Logic> ldata = signal->logic_data();
 107
 108                         const deque< shared_ptr<data::LogicSegment> > &lsegments =
 109                                 ldata->logic_segments();
 110
 111                         if (lsegments.empty()) {
 112                                 error_ = tr("Can't save logic channel without data.");
 113                                 return false;
 114                         }
 115
 116                         lsegment = lsegments.front();
 117                         any_segment = lsegment;
 118                 }
 119
 120                 if (signal->type() == data::SignalBase::AnalogChannel) {
 121                         // Each analog channel has its own segments
 122                         shared_ptr<data::Analog> adata = signal->analog_data();
 123
 124                         const deque< shared_ptr<data::AnalogSegment> > &asegments =
 125                                 adata->analog_segments();
 126
 127                         if (asegments.empty()) {
 128                                 error_ = tr("Can't save analog channel without data.");
 129                                 return false;
 130                         }
 131
 132                         asegment_list.push_back(asegments.front());
 133                         any_segment = asegments.front();
 134
 135                         achannel_list.push_back(signal);
 136                 }
 137         }
 138
 139         if (!any_segment) {
 140                 error_ = tr("No channels enabled.");
 141                 return false;
 142         }
 143
 144         // Check whether the user wants to export a certain sample range
 145         uint64_t end_sample;
 146
 147         if (sample_range_.first == sample_range_.second) {
 148                 start_sample_ = 0;
 149                 sample_count_ = any_segment->get_sample_count();
 150         } else {
 151                 if (sample_range_.first > sample_range_.second) {
 152                         start_sample_ = sample_range_.second;
 153                         end_sample = min(sample_range_.first, any_segment->get_sample_count());
 154                         sample_count_ = end_sample - start_sample_;
 155                 } else {
 156                         start_sample_ = sample_range_.first;
 157                         end_sample = min(sample_range_.second, any_segment->get_sample_count());
 158                         sample_count_ = end_sample - start_sample_;
 159                 }
 160         }
 161
 162         // Begin storing
 163         try {
 164                 const auto context = session_.device_manager().context();
 165                 auto device = session_.device()->device();
 166
 167                 map<string, Glib::VariantBase> options = options_;
 168
 169                 if (!output_format_->test_flag(OutputFlag::INTERNAL_IO_HANDLING))
 170                         output_stream_.open(file_name_, ios_base::binary |
 171                                         ios_base::trunc | ios_base::out);
 172
 173                 output_ = output_format_->create_output(file_name_, device, options);
 174                 auto meta = context->create_meta_packet(
 175                         {{ConfigKey::SAMPLERATE, Glib::Variant<guint64>::create(
 176                                 any_segment->samplerate())}});
 177                 output_->receive(meta);
 178         } catch (Error error) {
 179                 error_ = tr("Error while saving: ") + error.what();
 180                 return false;
 181         }
 182
 183         thread_ = std::thread(&StoreSession::store_proc, this,
 184                 achannel_list, asegment_list, lsegment);
 185         return true;
 186 }
 187
 188 void StoreSession::wait()
 189 {
 190         if (thread_.joinable())
 191                 thread_.join();
 192 }
 193
 194 void StoreSession::cancel()
 195 {
 196         interrupt_ = true;
 197 }
 198
 199 void StoreSession::store_proc(vector< shared_ptr<data::SignalBase> > achannel_list,
 200         vector< shared_ptr<data::AnalogSegment> > asegment_list,
 201         shared_ptr<data::LogicSegment> lsegment)
 202 {
 203         unsigned progress_scale = 0;
 204
 205         int aunit_size = 0;
 206         int lunit_size = 0;
 207         unsigned int lsamples_per_block = INT_MAX;
 208         unsigned int asamples_per_block = INT_MAX;
 209
 210         if (!asegment_list.empty()) {
 211                 // We assume all analog channels use the sample unit size
 212                 aunit_size = asegment_list.front()->unit_size();
 213                 asamples_per_block = BlockSize / aunit_size;
 214         }
 215         if (lsegment) {
 216                 lunit_size = lsegment->unit_size();
 217                 lsamples_per_block = BlockSize / lunit_size;
 218         }
 219
 220         // Qt needs the progress values to fit inside an int. If they would
 221         // not, scale the current and max values down until they do.
 222         while ((sample_count_ >> progress_scale) > INT_MAX)
 223                 progress_scale++;
 224
 225         unit_count_ = sample_count_ >> progress_scale;
 226
 227         const unsigned int samples_per_block =
 228                 min(asamples_per_block, lsamples_per_block);
 229
 230         while (!interrupt_ && sample_count_) {
 231                 progress_updated();
 232
 233                 const uint64_t packet_len =
 234                         min((uint64_t)samples_per_block, sample_count_);
 235
 236                 try {
 237                         const auto context = session_.device_manager().context();
 238
 239                         for (unsigned int i = 0; i < achannel_list.size(); i++) {
 240                                 shared_ptr<sigrok::Channel> achannel = (achannel_list.at(i))->channel();
 241                                 shared_ptr<data::AnalogSegment> asegment = asegment_list.at(i);
 242
 243                                 const float *adata =
 244                                         asegment->get_samples(start_sample_, start_sample_ + packet_len);
 245
 246                                 auto analog = context->create_analog_packet(
 247                                         vector<shared_ptr<sigrok::Channel> >{achannel},
 248                                         (float *)adata, packet_len,
 249                                         sigrok::Quantity::VOLTAGE, sigrok::Unit::VOLT,
 250                                         vector<const sigrok::QuantityFlag *>());
 251                                 const string adata_str = output_->receive(analog);
 252
 253                                 if (output_stream_.is_open())
 254                                         output_stream_ << adata_str;
 255
 256                                 delete[] adata;
 257                         }
 258
 259                         if (lsegment) {
 260                                 const uint8_t* ldata =
 261                                         lsegment->get_samples(start_sample_, start_sample_ + packet_len);
 262
 263                                 const size_t length = packet_len * lunit_size;
 264                                 auto logic = context->create_logic_packet((void*)ldata, length, lunit_size);
 265                                 const string ldata_str = output_->receive(logic);
 266
 267                                 if (output_stream_.is_open())
 268                                         output_stream_ << ldata_str;
 269
 270                                 delete[] ldata;
 271                         }
 272                 } catch (Error error) {
 273                         error_ = tr("Error while saving: ") + error.what();
 274                         break;
 275                 }
 276
 277                 sample_count_ -= packet_len;
 278                 start_sample_ += packet_len;
 279                 units_stored_ = unit_count_ - (sample_count_ >> progress_scale);
 280         }
 281
 282         // Zeroing the progress variables indicates completion
 283         units_stored_ = unit_count_ = 0;
 284
 285         store_successful();
 286         progress_updated();
 287
 288         output_.reset();
 289         output_stream_.close();
 290 }
 291
 292 }  // namespace pv