text: /*
  ===============================================================================
  
    FILE:  lasreaditemcompressed_v2.hpp
    
    CONTENTS:
    
      Implementation of LASitemReadCompressed for *all* items (version 2).
  
    PROGRAMMERS:
  
      martin.isenburg@rapidlasso.com  -  http://rapidlasso.com
  
    COPYRIGHT:
  
      (c) 2007-2014, martin isenburg, rapidlasso - fast tools to catch reality
  
      This is free software; you can redistribute and/or modify it under the
      terms of the GNU Lesser General Licence as published by the Free Software
      Foundation. See the COPYING file for more information.
  
      This software is distributed WITHOUT ANY WARRANTY and without even the
      implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    
    CHANGE HISTORY:
    
      28 August 2017 -- moving 'context' from global development hack to interface  
      6 September 2014 -- removed inheritance of EntropyEncoder and EntropyDecoder
      5 March 2011 -- created first night in ibiza to improve the RGB compressor
    
  ===============================================================================
  */
  #ifndef LAS_READ_ITEM_COMPRESSED_V2_HPP
  #define LAS_READ_ITEM_COMPRESSED_V2_HPP
  
  #include "lasreaditem.hpp"
  #include "arithmeticdecoder.hpp"
  #include "integercompressor.hpp"
  
  #include "laszip_common_v2.hpp"
  
  class LASreadItemCompressed_POINT10_v2 : public LASreadItemCompressed
  {
  public:
  
    LASreadItemCompressed_POINT10_v2(ArithmeticDecoder* dec);
  
    BOOL init(const U8* item, U32& context); // context is unused
    void read(U8* item, U32& context);       // context is unused
  
    ~LASreadItemCompressed_POINT10_v2();
  
  private:
    ArithmeticDecoder* dec;
    U8 last_item[20];
    U16 last_intensity[16];
    StreamingMedian5 last_x_diff_median5[16];
    StreamingMedian5 last_y_diff_median5[16];
    I32 last_height[8];
  
    ArithmeticModel* m_changed_values;
    IntegerCompressor* ic_intensity;
    ArithmeticModel* m_scan_angle_rank[2];
    IntegerCompressor* ic_point_source_ID;
    ArithmeticModel* m_bit_byte[256];
    ArithmeticModel* m_classification[256];
    ArithmeticModel* m_user_data[256];
    IntegerCompressor* ic_dx;
    IntegerCompressor* ic_dy;
    IntegerCompressor* ic_z;
  };
  
  class LASreadItemCompressed_GPSTIME11_v2 : public LASreadItemCompressed
  {
  public:
  
    LASreadItemCompressed_GPSTIME11_v2(ArithmeticDecoder* dec);
  
    BOOL init(const U8* item, U32& context); // context is unused
    void read(U8* item, U32& context);       // context is unused
  
    ~LASreadItemCompressed_GPSTIME11_v2();
  
  private:
    ArithmeticDecoder* dec;
    U32 last, next;
    U64I64F64 last_gpstime[4];
    I32 last_gpstime_diff[4];
    I32 multi_extreme_counter[4];
  
    ArithmeticModel* m_gpstime_multi;
    ArithmeticModel* m_gpstime_0diff;
    IntegerCompressor* ic_gpstime;
  };
  
  class LASreadItemCompressed_RGB12_v2 : public LASreadItemCompressed
  {
  public:
  
    LASreadItemCompressed_RGB12_v2(ArithmeticDecoder* dec);
  
    BOOL init(const U8* item, U32& context); // context is unused
    void read(U8* item, U32& context);       // context is unused
  
    ~LASreadItemCompressed_RGB12_v2();
  
  private:
    ArithmeticDecoder* dec;
    U16 last_item[3];
  
    ArithmeticModel* m_byte_used;
    ArithmeticModel* m_rgb_diff_0;
    ArithmeticModel* m_rgb_diff_1;
    ArithmeticModel* m_rgb_diff_2;
    ArithmeticModel* m_rgb_diff_3;
    ArithmeticModel* m_rgb_diff_4;
    ArithmeticModel* m_rgb_diff_5;
  };
  
  class LASreadItemCompressed_BYTE_v2 : public LASreadItemCompressed
  {
  public:
  
    LASreadItemCompressed_BYTE_v2(ArithmeticDecoder* dec, U32 number);
  
    BOOL init(const U8* item, U32& context); // context is unused
    void read(U8* item, U32& context);       // context is unused
  
    ~LASreadItemCompressed_BYTE_v2();
  
  private:
    ArithmeticDecoder* dec;
    U32 number;
    U8* last_item;
  
    ArithmeticModel** m_byte;
  };
  
  #endif
  