pv/data/decodesignal.hpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
   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_DATA_DECODESIGNAL_HPP
  21 #define PULSEVIEW_PV_DATA_DECODESIGNAL_HPP
  22
  23 #include <atomic>
  24 #include <condition_variable>
  25 #include <unordered_set>
  26 #include <vector>
  27
  28 #include <QSettings>
  29 #include <QString>
  30
  31 #include <libsigrokdecode/libsigrokdecode.h>
  32
  33 #include <pv/data/decode/row.hpp>
  34 #include <pv/data/decode/rowdata.hpp>
  35 #include <pv/data/signalbase.hpp>
  36 #include <pv/util.hpp>
  37
  38 using std::atomic;
  39 using std::condition_variable;
  40 using std::map;
  41 using std::mutex;
  42 using std::pair;
  43 using std::vector;
  44 using std::shared_ptr;
  45
  46 namespace pv {
  47 class Session;
  48
  49 namespace data {
  50
  51 namespace decode {
  52 class Annotation;
  53 class Decoder;
  54 class Row;
  55 }
  56
  57 class Logic;
  58 class LogicSegment;
  59 class SignalBase;
  60 class SignalData;
  61
  62 struct DecodeChannel
  63 {
  64         uint16_t id;     ///< Global numerical ID for the decode channels in the stack
  65         uint16_t bit_id; ///< Tells which bit within a sample represents this channel
  66         const bool is_optional;
  67         const pv::data::SignalBase *assigned_signal;
  68         const QString name, desc;
  69         int initial_pin_state;
  70         const shared_ptr<pv::data::decode::Decoder> decoder_;
  71         const srd_channel *pdch_;
  72 };
  73
  74 struct DecodeSegment
  75 {
  76         map<const decode::Row, decode::RowData> annotation_rows;
  77         pv::util::Timestamp start_time;
  78         double samplerate;
  79         int64_t samples_decoded;
  80 };
  81
  82 class DecodeSignal : public SignalBase
  83 {
  84         Q_OBJECT
  85
  86 private:
  87         static const double DecodeMargin;
  88         static const double DecodeThreshold;
  89         static const int64_t DecodeChunkLength;
  90
  91 public:
  92         DecodeSignal(pv::Session &session);
  93         virtual ~DecodeSignal();
  94
  95         bool is_decode_signal() const;
  96         const vector< shared_ptr<data::decode::Decoder> >& decoder_stack() const;
  97
  98         void stack_decoder(const srd_decoder *decoder);
  99         void remove_decoder(int index);
 100         bool toggle_decoder_visibility(int index);
 101
 102         void reset_decode();
 103         void begin_decode();
 104         QString error_message() const;
 105
 106         const vector<data::DecodeChannel> get_channels() const;
 107         void auto_assign_signals(const shared_ptr<pv::data::decode::Decoder> dec);
 108         void assign_signal(const uint16_t channel_id, const SignalBase *signal);
 109         int get_assigned_signal_count() const;
 110
 111         void set_initial_pin_state(const uint16_t channel_id, const int init_state);
 112
 113         double samplerate() const;
 114         const pv::util::Timestamp start_time() const;
 115
 116         /**
 117          * Returns the number of samples that can be worked on,
 118          * i.e. the number of samples where samples are available
 119          * for all connected channels.
 120          */
 121         int64_t get_working_sample_count(uint32_t segment_id) const;
 122
 123         int64_t get_decoded_sample_count(uint32_t segment_id) const;
 124
 125         vector<decode::Row> visible_rows() const;
 126
 127         /**
 128          * Extracts sorted annotations between two period into a vector.
 129          */
 130         void get_annotation_subset(
 131                 vector<pv::data::decode::Annotation> &dest,
 132                 const decode::Row &row, uint32_t segment_id, uint64_t start_sample,
 133                 uint64_t end_sample) const;
 134
 135         virtual void save_settings(QSettings &settings) const;
 136
 137         virtual void restore_settings(QSettings &settings);
 138
 139 private:
 140         void update_channel_list();
 141
 142         void commit_decoder_channels();
 143
 144         void mux_logic_samples(const int64_t start, const int64_t end);
 145
 146         void logic_mux_proc();
 147
 148         void query_input_metadata();
 149
 150         void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count);
 151
 152         void decode_proc();
 153
 154         void start_srd_session();
 155         void stop_srd_session();
 156
 157         void connect_input_notifiers();
 158
 159         void create_new_segment();
 160
 161         static void annotation_callback(srd_proto_data *pdata, void *decode_signal);
 162
 163 Q_SIGNALS:
 164         void new_annotations(); // TODO Supply segment for which they belong to
 165         void decode_reset();
 166         void decode_finished();
 167         void channels_updated();
 168
 169 private Q_SLOTS:
 170         void on_capture_state_changed(int state);
 171         void on_data_cleared();
 172         void on_data_received();
 173
 174 private:
 175         pv::Session &session_;
 176
 177         vector<data::DecodeChannel> channels_;
 178
 179         struct srd_session *srd_session_;
 180
 181         shared_ptr<Logic> logic_mux_data_;
 182         shared_ptr<LogicSegment> logic_mux_segment_;
 183         uint32_t logic_unit_size_;
 184         bool logic_mux_data_invalid_;
 185
 186         uint32_t currently_processed_segment_;
 187
 188         vector< shared_ptr<decode::Decoder> > stack_;
 189         map<pair<const srd_decoder*, int>, decode::Row> class_rows_;
 190
 191         vector<DecodeSegment> segments_;
 192         uint32_t current_segment_id_;
 193         DecodeSegment *current_segment_;
 194
 195         mutable mutex input_mutex_, output_mutex_, logic_mux_mutex_;
 196         mutable condition_variable decode_input_cond_, logic_mux_cond_;
 197
 198         std::thread decode_thread_, logic_mux_thread_;
 199         atomic<bool> decode_interrupt_, logic_mux_interrupt_;
 200
 201         QString error_message_;
 202 };
 203
 204 } // namespace data
 205 } // namespace pv
 206
 207 #endif // PULSEVIEW_PV_DATA_DECODESIGNAL_HPP