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 using std::recursive_mutex;
  31 using std::vector;
  32
  33 namespace SegmentTest {
  34 struct SmallSize8Single;
  35 struct MediumSize8Single;
  36 struct MaxSize8Single;
  37 struct MediumSize24Single;
  38 struct MediumSize32Single;
  39 struct MaxSize32Single;
  40 struct MediumSize32Multi;
  41 struct MaxSize32Multi;
  42 struct MaxSize32MultiAtOnce;
  43 struct MaxSize32MultiIterated;
  44 }  // namespace SegmentTest
  45
  46 namespace pv {
  47 namespace data {
  48
  49 typedef struct {
  50         uint64_t sample_index, chunk_num, chunk_offs;
  51         uint8_t* chunk;
  52         uint8_t* value;
  53 } SegmentRawDataIterator;
  54
  55 class Segment
  56 {
  57 private:
  58         static const uint64_t MaxChunkSize;
  59
  60 public:
  61         Segment(uint64_t samplerate, unsigned int unit_size);
  62
  63         virtual ~Segment();
  64
  65         uint64_t get_sample_count() const;
  66
  67         const pv::util::Timestamp& start_time() const;
  68
  69         double samplerate() const;
  70         void set_samplerate(double samplerate);
  71
  72         unsigned int unit_size() const;
  73
  74         void free_unused_memory();
  75
  76 protected:
  77         void append_single_sample(void *data);
  78         void append_samples(void *data, uint64_t samples);
  79         void get_raw_samples(uint64_t start, uint64_t count, uint8_t *dest) const;
  80
  81         SegmentRawDataIterator* begin_raw_sample_iteration(uint64_t start);
  82         void continue_raw_sample_iteration(SegmentRawDataIterator* it, uint64_t increase);
  83         void end_raw_sample_iteration(SegmentRawDataIterator* it);
  84
  85         mutable recursive_mutex mutex_;
  86         vector<uint8_t*> data_chunks_;
  87         uint8_t* current_chunk_;
  88         uint64_t used_samples_, unused_samples_;
  89         uint64_t sample_count_;
  90         pv::util::Timestamp start_time_;
  91         double samplerate_;
  92         uint64_t chunk_size_;
  93         unsigned int unit_size_;
  94         int iterator_count_;
  95         bool mem_optimization_requested_;
  96
  97         friend struct SegmentTest::SmallSize8Single;
  98         friend struct SegmentTest::MediumSize8Single;
  99         friend struct SegmentTest::MaxSize8Single;
 100         friend struct SegmentTest::MediumSize24Single;
 101         friend struct SegmentTest::MediumSize32Single;
 102         friend struct SegmentTest::MaxSize32Single;
 103         friend struct SegmentTest::MediumSize32Multi;
 104         friend struct SegmentTest::MaxSize32Multi;
 105         friend struct SegmentTest::MaxSize32MultiAtOnce;
 106         friend struct SegmentTest::MaxSize32MultiIterated;
 107 };
 108
 109 } // namespace data
 110 } // namespace pv
 111
 112 #endif // PULSEVIEW_PV_DATA_SEGMENT_HPP