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