pv/data/segment.hpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
   5  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef PULSEVIEW_PV_DATA_SEGMENT_HPP
  22 #define PULSEVIEW_PV_DATA_SEGMENT_HPP
  23
  24 #include "pv/util.hpp"
  25
  26 #include <mutex>
  27 #include <thread>
  28 #include <vector>
  29
  30 #include <QObject>
  31
  32 using std::recursive_mutex;
  33 using std::vector;
  34
  35 namespace SegmentTest {
  36 struct SmallSize8Single;
  37 struct MediumSize8Single;
  38 struct MaxSize8Single;
  39 struct MediumSize24Single;
  40 struct MediumSize32Single;
  41 struct MaxSize32Single;
  42 struct MediumSize32Multi;
  43 struct MaxSize32Multi;
  44 struct MaxSize32MultiAtOnce;
  45 struct MaxSize32MultiIterated;
  46 }  // namespace SegmentTest
  47
  48 namespace pv {
  49 namespace data {
  50
  51 typedef struct {
  52         uint64_t sample_index, chunk_num, chunk_offs;
  53         uint8_t* chunk;
  54         uint8_t* value;
  55 } SegmentRawDataIterator;
  56
  57 class Segment : public QObject
  58 {
  59         Q_OBJECT
  60
  61 private:
  62         static const uint64_t MaxChunkSize;
  63
  64 public:
  65         Segment(uint32_t segment_id, uint64_t samplerate, unsigned int unit_size);
  66
  67         virtual ~Segment();
  68
  69         uint64_t get_sample_count() const;
  70
  71         const pv::util::Timestamp& start_time() const;
  72
  73         double samplerate() const;
  74         void set_samplerate(double samplerate);
  75
  76         unsigned int unit_size() const;
  77
  78         uint32_t segment_id() const;
  79
  80         void set_complete();
  81         bool is_complete() const;
  82
  83         void free_unused_memory();
  84
  85 protected:
  86         void append_single_sample(void *data);
  87         void append_samples(void *data, uint64_t samples);
  88         void get_raw_samples(uint64_t start, uint64_t count, uint8_t *dest) const;
  89
  90         SegmentRawDataIterator* begin_raw_sample_iteration(uint64_t start);
  91         void continue_raw_sample_iteration(SegmentRawDataIterator* it, uint64_t increase);
  92         void end_raw_sample_iteration(SegmentRawDataIterator* it);
  93
  94         uint32_t segment_id_;
  95         mutable recursive_mutex mutex_;
  96         vector<uint8_t*> data_chunks_;
  97         uint8_t* current_chunk_;
  98         uint64_t used_samples_, unused_samples_;
  99         uint64_t sample_count_;
 100         pv::util::Timestamp start_time_;
 101         double samplerate_;
 102         uint64_t chunk_size_;
 103         unsigned int unit_size_;
 104         int iterator_count_;
 105         bool mem_optimization_requested_;
 106         bool is_complete_;
 107
 108         friend struct SegmentTest::SmallSize8Single;
 109         friend struct SegmentTest::MediumSize8Single;
 110         friend struct SegmentTest::MaxSize8Single;
 111         friend struct SegmentTest::MediumSize24Single;
 112         friend struct SegmentTest::MediumSize32Single;
 113         friend struct SegmentTest::MaxSize32Single;
 114         friend struct SegmentTest::MediumSize32Multi;
 115         friend struct SegmentTest::MaxSize32Multi;
 116         friend struct SegmentTest::MaxSize32MultiAtOnce;
 117         friend struct SegmentTest::MaxSize32MultiIterated;
 118 };
 119
 120 } // namespace data
 121 } // namespace pv
 122
 123 #endif // PULSEVIEW_PV_DATA_SEGMENT_HPP