pv/session.hpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012-14 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 #ifndef PULSEVIEW_PV_SESSION_HPP
  21 #define PULSEVIEW_PV_SESSION_HPP
  22
  23 #ifdef ENABLE_FLOW
  24 #include <atomic>
  25 #include <condition_variable>
  26 #endif
  27
  28 #include <functional>
  29 #include <map>
  30 #include <memory>
  31 #include <mutex>
  32 #include <set>
  33 #include <string>
  34 #include <thread>
  35 #include <unordered_set>
  36 #include <vector>
  37
  38 #include <QObject>
  39 #include <QSettings>
  40 #include <QString>
  41 #include <QElapsedTimer>
  42
  43 #ifdef ENABLE_FLOW
  44 #include <gstreamermm.h>
  45 #include <libsigrokflow/libsigrokflow.hpp>
  46 #endif
  47
  48 #include "util.hpp"
  49 #include "views/viewbase.hpp"
  50
  51
  52 using std::function;
  53 using std::list;
  54 using std::map;
  55 using std::mutex;
  56 using std::recursive_mutex;
  57 using std::shared_ptr;
  58 using std::string;
  59 using std::unordered_set;
  60
  61 #ifdef ENABLE_FLOW
  62 using Glib::RefPtr;
  63 using Gst::AppSink;
  64 using Gst::Element;
  65 using Gst::Pipeline;
  66 #endif
  67
  68 struct srd_decoder;
  69 struct srd_channel;
  70
  71 namespace sigrok {
  72 class Analog;
  73 class Channel;
  74 class Device;
  75 class InputFormat;
  76 class Logic;
  77 class Meta;
  78 class Option;
  79 class OutputFormat;
  80 class Packet;
  81 class Session;
  82 }  // namespace sigrok
  83
  84 using sigrok::Option;
  85
  86 namespace pv {
  87
  88 class DeviceManager;
  89
  90 namespace data {
  91 class Analog;
  92 class AnalogSegment;
  93 class DecodeSignal;
  94 class Logic;
  95 class LogicSegment;
  96 class SignalBase;
  97 class SignalData;
  98 }
  99
 100 namespace devices {
 101 class Device;
 102 }
 103
 104 namespace toolbars {
 105 class MainBar;
 106 }
 107
 108 namespace views {
 109 class ViewBase;
 110 }
 111
 112 class Session : public QObject
 113 {
 114         Q_OBJECT
 115
 116 public:
 117         enum capture_state {
 118                 Stopped,
 119                 AwaitingTrigger,
 120                 Running
 121         };
 122
 123         static shared_ptr<sigrok::Context> sr_context;
 124
 125 public:
 126         Session(DeviceManager &device_manager, QString name);
 127
 128         ~Session();
 129
 130         DeviceManager& device_manager();
 131
 132         const DeviceManager& device_manager() const;
 133
 134         shared_ptr<sigrok::Session> session() const;
 135
 136         shared_ptr<devices::Device> device() const;
 137
 138         QString name() const;
 139
 140         void set_name(QString name);
 141
 142         const list< shared_ptr<views::ViewBase> > views() const;
 143
 144         shared_ptr<views::ViewBase> main_view() const;
 145
 146         shared_ptr<pv::toolbars::MainBar> main_bar() const;
 147
 148         void set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar);
 149
 150         /**
 151          * Indicates whether the captured data was saved to disk already or not
 152          */
 153         bool data_saved() const;
 154
 155         void save_setup(QSettings &settings) const;
 156
 157         void save_settings(QSettings &settings) const;
 158
 159         void restore_setup(QSettings &settings);
 160
 161         void restore_settings(QSettings &settings);
 162
 163         /**
 164          * Attempts to set device instance, may fall back to demo if needed
 165          */
 166         void select_device(shared_ptr<devices::Device> device);
 167
 168         /**
 169          * Sets device instance that will be used in the next capture session.
 170          */
 171         void set_device(shared_ptr<devices::Device> device);
 172
 173         void set_default_device();
 174
 175         void load_init_file(const string &file_name, const string &format,
 176                 const string &setup_file_name);
 177
 178         void load_file(QString file_name, QString setup_file_name = QString(),
 179                 shared_ptr<sigrok::InputFormat> format = nullptr,
 180                 const map<string, Glib::VariantBase> &options =
 181                         map<string, Glib::VariantBase>());
 182
 183         capture_state get_capture_state() const;
 184
 185         void start_capture(function<void (const QString)> error_handler);
 186
 187         void stop_capture();
 188
 189         double get_samplerate() const;
 190
 191         uint32_t get_segment_count() const;
 192
 193         vector<util::Timestamp> get_triggers(uint32_t segment_id) const;
 194
 195         void register_view(shared_ptr<views::ViewBase> view);
 196
 197         void deregister_view(shared_ptr<views::ViewBase> view);
 198
 199         bool has_view(shared_ptr<views::ViewBase> view);
 200
 201         const unordered_set< shared_ptr<data::SignalBase> > signalbases() const;
 202
 203         bool all_segments_complete(uint32_t segment_id) const;
 204
 205 #ifdef ENABLE_DECODE
 206         shared_ptr<data::DecodeSignal> add_decode_signal();
 207
 208         void remove_decode_signal(shared_ptr<data::DecodeSignal> signal);
 209 #endif
 210
 211 private:
 212         void set_capture_state(capture_state state);
 213
 214         void update_signals();
 215
 216         shared_ptr<data::SignalBase> signalbase_from_channel(
 217                 shared_ptr<sigrok::Channel> channel) const;
 218
 219         static map<string, Glib::VariantBase> input_format_options(
 220                 vector<string> user_spec,
 221                 map<string, shared_ptr<Option>> fmt_opts);
 222
 223         void sample_thread_proc(function<void (const QString)> error_handler);
 224
 225         void free_unused_memory();
 226
 227         void signal_new_segment();
 228         void signal_segment_completed();
 229
 230 #ifdef ENABLE_FLOW
 231         bool on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message);
 232
 233         Gst::FlowReturn on_gst_new_sample();
 234 #endif
 235
 236         void feed_in_header();
 237
 238         void feed_in_meta(shared_ptr<sigrok::Meta> meta);
 239
 240         void feed_in_trigger();
 241
 242         void feed_in_frame_begin();
 243         void feed_in_frame_end();
 244
 245         void feed_in_logic(shared_ptr<sigrok::Logic> logic);
 246
 247         void feed_in_analog(shared_ptr<sigrok::Analog> analog);
 248
 249         void data_feed_in(shared_ptr<sigrok::Device> device,
 250                 shared_ptr<sigrok::Packet> packet);
 251
 252 Q_SIGNALS:
 253         void capture_state_changed(int state);
 254         void device_changed();
 255
 256         void signals_changed();
 257
 258         void name_changed();
 259
 260         void trigger_event(int segment_id, util::Timestamp location);
 261
 262         void new_segment(int new_segment_id);
 263         void segment_completed(int segment_id);
 264
 265         void data_received();
 266
 267         void add_view(views::ViewType type, Session *session);
 268
 269 public Q_SLOTS:
 270         void on_data_saved();
 271
 272 #ifdef ENABLE_DECODE
 273         void on_new_decoders_selected(vector<const srd_decoder*> decoders);
 274 #endif
 275
 276 private:
 277         DeviceManager &device_manager_;
 278         shared_ptr<devices::Device> device_;
 279         QString default_name_, name_;
 280
 281         list< shared_ptr<views::ViewBase> > views_;
 282         shared_ptr<pv::views::ViewBase> main_view_;
 283
 284         shared_ptr<pv::toolbars::MainBar> main_bar_;
 285
 286         mutable mutex sampling_mutex_; //!< Protects access to capture_state_.
 287         capture_state capture_state_;
 288
 289         unordered_set< shared_ptr<data::SignalBase> > signalbases_;
 290         unordered_set< shared_ptr<data::SignalData> > all_signal_data_;
 291
 292         /// trigger_list_ contains pairs of <segment_id, timestamp> values.
 293         vector< std::pair<uint32_t, util::Timestamp> > trigger_list_;
 294
 295         mutable recursive_mutex data_mutex_;
 296         shared_ptr<data::Logic> logic_data_;
 297         uint64_t cur_samplerate_;
 298         shared_ptr<data::LogicSegment> cur_logic_segment_;
 299         map< shared_ptr<sigrok::Channel>, shared_ptr<data::AnalogSegment> >
 300                 cur_analog_segments_;
 301         int32_t highest_segment_id_;
 302
 303         std::thread sampling_thread_;
 304
 305         bool out_of_memory_;
 306         bool data_saved_;
 307         bool frame_began_;
 308
 309         QElapsedTimer acq_time_;
 310
 311 #ifdef ENABLE_FLOW
 312         RefPtr<Pipeline> pipeline_;
 313         RefPtr<Element> source_;
 314         RefPtr<AppSink> sink_;
 315
 316         mutable mutex pipeline_done_mutex_;
 317         mutable condition_variable pipeline_done_cond_;
 318         atomic<bool> pipeline_done_interrupt_;
 319 #endif
 320 };
 321
 322 } // namespace pv
 323
 324 #endif // PULSEVIEW_PV_SESSION_HPP