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_incl, samples_decoded_excl;
  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(bool shutting_down = false);
 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         /**
 124          * Returns the number of processed samples. Newly generated annotations will
 125          * have sample numbers greater than this.
 126          *
 127          * If include_processing is true, this number will include the ones being
 128          * currently processed (in case the decoder stack is running). In this case,
 129          * newly generated annotations will have sample numbers smaller than this.
 130          */
 131         int64_t get_decoded_sample_count(uint32_t segment_id,
 132                 bool include_processing) const;
 133
 134         vector<decode::Row> visible_rows() const;
 135
 136         /**
 137          * Extracts annotations from a single row into a vector.
 138          * Note: The annotations may be unsorted and only annotations that fully
 139          * fit into the sample range are considered.
 140          */
 141         void get_annotation_subset(
 142                 vector<pv::data::decode::Annotation> &dest,
 143                 const decode::Row &row, uint32_t segment_id, uint64_t start_sample,
 144                 uint64_t end_sample) const;
 145
 146         /**
 147          * Extracts annotations from all rows into a vector.
 148          * Note: The annotations may be unsorted and only annotations that fully
 149          * fit into the sample range are considered.
 150          */
 151         void get_annotation_subset(
 152                 vector<pv::data::decode::Annotation> &dest,
 153                 uint32_t segment_id, uint64_t start_sample, uint64_t end_sample) const;
 154
 155         virtual void save_settings(QSettings &settings) const;
 156
 157         virtual void restore_settings(QSettings &settings);
 158
 159 private:
 160         void set_error_message(QString msg);
 161
 162         uint32_t get_input_segment_count() const;
 163
 164         uint32_t get_input_samplerate(uint32_t segment_id) const;
 165
 166         void update_channel_list();
 167
 168         void commit_decoder_channels();
 169
 170         void mux_logic_samples(uint32_t segment_id, const int64_t start, const int64_t end);
 171
 172         void logic_mux_proc();
 173
 174         void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count,
 175                 const shared_ptr<LogicSegment> input_segment);
 176
 177         void decode_proc();
 178
 179         void start_srd_session();
 180         void terminate_srd_session();
 181         void stop_srd_session();
 182
 183         void connect_input_notifiers();
 184
 185         void create_decode_segment();
 186
 187         static void annotation_callback(srd_proto_data *pdata, void *decode_signal);
 188
 189 Q_SIGNALS:
 190         void new_annotations(); // TODO Supply segment for which they belong to
 191         void decode_reset();
 192         void decode_finished();
 193         void channels_updated();
 194
 195 private Q_SLOTS:
 196         void on_capture_state_changed(int state);
 197         void on_data_cleared();
 198         void on_data_received();
 199
 200 private:
 201         pv::Session &session_;
 202
 203         vector<data::DecodeChannel> channels_;
 204
 205         struct srd_session *srd_session_;
 206
 207         shared_ptr<Logic> logic_mux_data_;
 208         uint32_t logic_mux_unit_size_;
 209         bool logic_mux_data_invalid_;
 210
 211         vector< shared_ptr<decode::Decoder> > stack_;
 212         bool stack_config_changed_;
 213         map<pair<const srd_decoder*, int>, decode::Row> class_rows_;
 214
 215         vector<DecodeSegment> segments_;
 216         uint32_t current_segment_id_;
 217
 218         mutable mutex input_mutex_, output_mutex_, logic_mux_mutex_;
 219         mutable condition_variable decode_input_cond_, logic_mux_cond_;
 220
 221         std::thread decode_thread_, logic_mux_thread_;
 222         atomic<bool> decode_interrupt_, logic_mux_interrupt_;
 223
 224         QString error_message_;
 225 };
 226
 227 } // namespace data
 228 } // namespace pv
 229
 230 #endif // PULSEVIEW_PV_DATA_DECODESIGNAL_HPP