ojph_params_local.h

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//***************************************************************************/
// This software is released under the 2-Clause BSD license, included
// below.
//
// Copyright (c) 2019, Aous Naman
// Copyright (c) 2019, Kakadu Software Pty Ltd, Australia
// Copyright (c) 2019, The University of New South Wales, Australia
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//***************************************************************************/
// This file is part of the OpenJPH software implementation.
// File: ojph_params_local.h
// Author: Aous Naman
// Date: 28 August 2019
//***************************************************************************/
 
 
#ifndef OJPH_PARAMS_LOCAL_H
#define OJPH_PARAMS_LOCAL_H
 
#include <cstring>
#include <cassert>
 
#include "ojph_defs.h"
#include "ojph_base.h"
#include "ojph_arch.h"
#include "ojph_message.h"
 
namespace ojph {

  class outfile_base;
  class infile_base;

  enum PROGRESSION_ORDER : si32
  {
    OJPH_PO_LRCP = 0,
    OJPH_PO_RLCP = 1,
    OJPH_PO_RPCL = 2,
    OJPH_PO_PCRL = 3,
    OJPH_PO_CPRL = 4
  };

  const char OJPH_PO_STRING_LRCP[] = "LRCP";
  const char OJPH_PO_STRING_RLCP[] = "RLCP";
  const char OJPH_PO_STRING_RPCL[] = "RPCL";
  const char OJPH_PO_STRING_PCRL[] = "PCRL";
  const char OJPH_PO_STRING_CPRL[] = "CPRL";

  enum OJPH_PROFILE_NUM : si32
  {
    OJPH_PN_UNDEFINED = 0,
    OJPH_PN_PROFILE0 = 1,
    OJPH_PN_PROFILE1 = 2,
    OJPH_PN_CINEMA2K = 3,
    OJPH_PN_CINEMA4K = 4,
    OJPH_PN_CINEMAS2K = 5,
    OJPH_PN_CINEMAS4K = 6,
    OJPH_PN_BROADCAST = 7,
    OJPH_PN_IMF = 8
  };

  const char OJPH_PN_STRING_PROFILE0[] = "PROFILE0";
  const char OJPH_PN_STRING_PROFILE1[] = "PROFILE1";
  const char OJPH_PN_STRING_CINEMA2K[] = "CINEMA2K";
  const char OJPH_PN_STRING_CINEMA4K[] = "CINEMA4K";
  const char OJPH_PN_STRING_CINEMAS2K[] = "CINEMAS2K";
  const char OJPH_PN_STRING_CINEMAS4K[] = "CINEMAS4K";
  const char OJPH_PN_STRING_BROADCAST[] = "BROADCAST";
  const char OJPH_PN_STRING_IMF[] = "IMF";

  enum OJPH_TILEPART_DIVISIONS: ui32 {
    OJPH_TILEPART_NO_DIVISIONS = 0x0, // no divisions to tile parts
    OJPH_TILEPART_RESOLUTIONS  = 0x1,
    OJPH_TILEPART_COMPONENTS   = 0x2,
    OJPH_TILEPART_LAYERS       = 0x4, // these are meaningless with HTJ2K
    OJPH_TILEPART_MASK         = 0x3, // mask used for testing
  };
 
  namespace local {
 
    //defined here
    struct param_siz;
    struct param_cod;
    struct param_qcd;
    struct param_cap;
    struct param_sot;
    struct param_tlm;
    struct param_dfs;
    struct param_atk;

    enum JP2K_MARKER : ui16
    {
      SOC = 0xFF4F, //start of codestream (required)
      CAP = 0xFF50, //extended capability
      SIZ = 0xFF51, //image and tile size (required)
      COD = 0xFF52, //coding style default (required)
      COC = 0xFF53, //coding style component
      TLM = 0xFF55, //tile-part lengths
      PRF = 0xFF56, //profile
      PLM = 0xFF57, //packet length, main header
      PLT = 0xFF58, //packet length, tile-part header
      CPF = 0xFF59, //corresponding profile values
      QCD = 0xFF5C, //qunatization default (required)
      QCC = 0xFF5D, //quantization component
      RGN = 0xFF5E, //region of interest
      POC = 0xFF5F, //progression order change
      PPM = 0xFF60, //packed packet headers, main header
      PPT = 0xFF61, //packed packet headers, tile-part header
      CRG = 0xFF63, //component registration
      COM = 0xFF64, //comment
      DFS = 0xFF72, //downsampling factor styles
      ADS = 0xFF73, //arbitrary decomposition styles
      NLT = 0xFF76, //non-linearity point transformation
      ATK = 0xFF79, //arbitrary transformation kernels
      SOT = 0xFF90, //start of tile-part
      SOP = 0xFF91, //start of packet
      EPH = 0xFF92, //end of packet
      SOD = 0xFF93, //start of data
      EOC = 0xFFD9, //end of codestream (required)
    };

    //
    //
    //
    //
    //
    struct siz_comp_info
    {
      ui8 SSiz;
      ui8 XRsiz;
      ui8 YRsiz;
    };

    struct param_siz
    {
      friend ::ojph::param_siz;
 
    public:
      enum : ui16 {
        RSIZ_NLT_FLAG  =  0x200,
        RSIZ_HT_FLAG   = 0x4000,
        RSIZ_EXT_FLAG  = 0x8000,
      };
 
    public:
      param_siz() { init(); }
      ~param_siz() { destroy(); }
 
      void init()
      {
        Lsiz = Csiz = 0;
        Xsiz = Ysiz = XOsiz = YOsiz = XTsiz = YTsiz = XTOsiz = YTOsiz = 0;
        skipped_resolutions = 0;
        memset(store, 0, sizeof(store));
        ws_kern_support_needed = dfs_support_needed = false;
        cod = NULL;
        dfs = NULL;
        Rsiz = RSIZ_HT_FLAG;
        cptr = store;
        old_Csiz = sizeof(store) / sizeof(siz_comp_info);
      }
 
      void destroy()
      { if (cptr != store) { delete[] cptr; cptr = NULL; } }
 
      void set_num_components(ui32 num_comps)
      {
        Csiz = (ui16)num_comps;
        if (Csiz > old_Csiz)
        {
          if (cptr != store)
            delete[] cptr;
          cptr = new siz_comp_info[num_comps];
          old_Csiz = Csiz;
        }
        memset(cptr, 0, sizeof(local::siz_comp_info) * num_comps);
      }
 
      void set_comp_info(ui32 comp_num, const point& downsampling,
                         ui32 bit_depth, bool is_signed)
      {
        assert(comp_num < Csiz);
        assert(downsampling.x != 0 && downsampling.y != 0);
        cptr[comp_num].SSiz = (ui8)(bit_depth - 1 + (is_signed ? 0x80 : 0));
        cptr[comp_num].XRsiz = (ui8)downsampling.x;
        cptr[comp_num].YRsiz = (ui8)downsampling.y;
      }
 
      void set_image_extent(point dims) { Xsiz = dims.x; Ysiz = dims.y; }
      point get_image_extent() const { return point(Xsiz, Ysiz); }
      void set_tile_size(size s) { XTsiz = s.w; YTsiz = s.h; }
      size get_tile_size() const { return size(XTsiz, YTsiz); }
      void set_image_offset(point offset)
      { XOsiz = offset.x; YOsiz = offset.y; }
      point get_image_offset() const
      { return point(XOsiz, YOsiz); }
      void set_tile_offset(point offset)
      { XTOsiz = offset.x; YTOsiz = offset.y; }
      point get_tile_offset() const
      { return point(XTOsiz, YTOsiz); }
 
      void set_cod(const param_cod& cod) { this->cod = &cod; }
 
      void check_validity()
      {
        if (Xsiz == 0 || Ysiz == 0 || XTsiz == 0 || YTsiz == 0)
          OJPH_ERROR(0x00040001,
            "Image extent and/or tile size cannot be zero");
        if (XTOsiz > XOsiz || YTOsiz > YOsiz)
          OJPH_ERROR(0x00040002,
            "Tile offset has to be smaller than the image offset");
        if (XTsiz + XTOsiz <= XOsiz || YTsiz + YTOsiz <= YOsiz)
          OJPH_ERROR(0x00040003,
            "The top left tile must intersect with the image");
        if (Xsiz <= XOsiz || Ysiz <= YOsiz)
          OJPH_ERROR(0x00040004,
            "The image extent must be larger than the image offset");
      }
 
      ui16 get_num_components() const { return Csiz; }
      ui32 get_bit_depth(ui32 comp_num) const
      {
        assert(comp_num < Csiz);
        return (cptr[comp_num].SSiz & 0x7F) + 1u;
      }
      bool is_signed(ui32 comp_num) const
      {
        assert(comp_num < Csiz);
        return (cptr[comp_num].SSiz & 0x80) != 0;
      }
      point get_downsampling(ui32 comp_num) const
      {
        assert(comp_num < Csiz);
        return point(cptr[comp_num].XRsiz, cptr[comp_num].YRsiz);
      }
 
      bool write(outfile_base *file);
      void read(infile_base *file);
 
      void link(const param_cod* cod)
      { this->cod = cod; }
 
      void link(const param_dfs* dfs)
      { this->dfs = dfs; }
 
      void set_skipped_resolutions(ui32 skipped_resolutions)
      { this->skipped_resolutions = skipped_resolutions; }
 
      ui32 get_width(ui32 comp_num) const
      {
        assert(comp_num < get_num_components());
        ui32 ds = (ui32)cptr[comp_num].XRsiz;
        ui32 t = ojph_div_ceil(Xsiz, ds) - ojph_div_ceil(XOsiz, ds);
        return t;
      }
 
      ui32 get_height(ui32 comp_num) const
      {
        assert(comp_num < get_num_components());
        ui32 ds = (ui32)cptr[comp_num].YRsiz;
        ui32 t = ojph_div_ceil(Ysiz, ds) - ojph_div_ceil(YOsiz, ds);
        return t;
      }
 
      point get_recon_downsampling(ui32 comp_num) const;
      point get_recon_size(ui32 comp_num) const;
      ui32 get_recon_width(ui32 comp_num) const
      { return get_recon_size(comp_num).x; }
      ui32 get_recon_height(ui32 comp_num) const
      { return get_recon_size(comp_num).y; }
 
      bool is_ws_kern_support_needed() { return ws_kern_support_needed; }
      bool is_dfs_support_needed() { return dfs_support_needed; }
 
      void set_Rsiz_flag(ui16 flag)
      { Rsiz |= flag; }
      void reset_Rsiz_flag(ui16 flag)
      { Rsiz = (ui16)(Rsiz & ~flag); }
 
    private:
      ui16 Lsiz;
      ui16 Rsiz;
      ui32 Xsiz;
      ui32 Ysiz;
      ui32 XOsiz;
      ui32 YOsiz;
      ui32 XTsiz;
      ui32 YTsiz;
      ui32 XTOsiz;
      ui32 YTOsiz;
      ui16 Csiz;
      siz_comp_info* cptr;
 
    private:
      ui32 skipped_resolutions;
      int old_Csiz;
      siz_comp_info store[4];
      bool ws_kern_support_needed;
      bool dfs_support_needed;
      const param_cod* cod;
      const param_dfs* dfs;
      param_siz(const param_siz&) = delete; //prevent copy constructor
      param_siz& operator=(const param_siz&) = delete; //prevent copy
    };

    //
    //
    //
    //
    //
    struct cod_SPcod
    {
      cod_SPcod() {
        num_decomp = 5;
        block_width = 4;    // 64
        block_height = 4;   // 64
        block_style = 0x40; // HT mode
        wavelet_trans = 0;  // reversible 5 / 3
        memset(precinct_size, 0, sizeof(precinct_size));
      }
 
      ui8 num_decomp;
      ui8 block_width;
      ui8 block_height;
      ui8 block_style;
      ui8 wavelet_trans;
      ui8 precinct_size[33]; //num_decomp is in [0,32]
 
      size get_log_block_dims() const
      { return size(block_width + 2, block_height + 2); }
      size get_block_dims() const
      { size t = get_log_block_dims(); return size(1 << t.w, 1 << t.h); }
      size get_log_precinct_size(ui32 res_num) const
      {
        assert(res_num <= num_decomp);
        size ps(precinct_size[res_num] & 0xF, precinct_size[res_num] >> 4);
        return ps;
      }
    };

    struct cod_SGcod
    {
      cod_SGcod() : prog_order(OJPH_PO_RPCL), num_layers(1), mc_trans(0) {}
      ui8 prog_order;
      ui16 num_layers;
      ui8 mc_trans;
    };

    struct param_cod
    {
      // serves for both COD and COC markers
      friend ::ojph::param_cod;
      enum default_comp_num : ui16 {
        OJPH_COD_UNKNOWN = 65534,
        OJPH_COD_DEFAULT = 65535
      };

      enum BLOCK_CODING_STYLES {
        VERT_CAUSAL_MODE = 0x8,
        HT_MODE = 0x40
      };

      enum cod_type : ui8 {
        UNDEFINED = 0,
        COD_MAIN  = 1,
        COC_MAIN  = 2,
        COD_TILE  = 3,  // not implemented
        COC_TILE  = 4   // not implemented
      };

      enum dwt_type : ui8 {
        DWT_IRV97 = 0,
        DWT_REV53 = 1,
      };
 
    public: // COD_MAIN and COC_MAIN common functions
      param_cod(param_cod* top_cod = NULL, ui16 comp_idx = OJPH_COD_DEFAULT)
      { avail = NULL; init(top_cod, comp_idx); }
      ~param_cod() { destroy(); }

      void restart()
      {
        param_cod** p = &avail; // move next to the end of avail
        while (*p != NULL)
          p = &((*p)->next);
        *p = next;
        this->init(top_cod, OJPH_COD_DEFAULT);
      }

      void set_reversible(bool reversible)
      {
        assert(type == UNDEFINED || type == COD_MAIN || type == COC_MAIN);
        SPcod.wavelet_trans = reversible ? DWT_REV53 : DWT_IRV97;
      }

      void employ_color_transform(ui8 val)
      {
        assert(val == 0 || val == 1);
        assert(type == UNDEFINED || type == COD_MAIN);
        SGCod.mc_trans = val;
      }

      void check_validity(const param_siz& siz)
      {
        assert(type == COD_MAIN);
 
        //check that colour transform and match number of components and
        // downsampling
        int num_comps = siz.get_num_components();
        if (SGCod.mc_trans == 1 && num_comps < 3)
          OJPH_ERROR(0x00040011,
            "color transform can only be employed when the image has 3 or "
            "more color components");
 
        if (SGCod.mc_trans == 1)
        {
          bool test_signedness = false;
          bool test_bit_depth = false;
          bool test_downsampling = false;
          point p = siz.get_downsampling(0);
          ui32 bit_depth = siz.get_bit_depth(0);
          bool is_signed = siz.is_signed(0);
          for (ui32 i = 1; i < 3; ++i)
          {
            point p1 = siz.get_downsampling(i);
            test_downsampling = test_downsampling
              || (p.x != p1.x || p.y != p1.y);
            test_bit_depth = test_bit_depth
              || (bit_depth != siz.get_bit_depth(i));
            test_signedness = test_signedness
              || (is_signed != siz.is_signed(i));
          }
          if (test_downsampling)
            OJPH_ERROR(0x00040012,
              "when color transform is used, the first 3 colour components "
              "must have the same downsampling factor.");
          if (test_bit_depth)
            OJPH_ERROR(0x00040014,
              "when color transform is used, the first 3 colour components "
              "must have the same bit depth.");
          if (test_signedness)
            OJPH_ERROR(0x00040015,
              "when color transform is used, the first 3 colour components "
              "must have the same signedness (signed or unsigned).");
 
        }
 
        //check the progression order matches downsampling
        if (SGCod.prog_order == OJPH_PO_RPCL ||
            SGCod.prog_order == OJPH_PO_PCRL)
        {
          ui32 num_comps = siz.get_num_components();
          for (ui32 i = 0; i < num_comps; ++i)
          {
            point r = siz.get_downsampling(i);
            if (r.x & (r.x - 1) || r.y & (r.y - 1))
              OJPH_ERROR(0x00040013, "For RPCL and PCRL progression orders,"
                "component downsampling factors have to be powers of 2");
          }
        }
      }

      ui8 get_num_decompositions() const
      {
        if (type == COD_MAIN)
          return SPcod.num_decomp;
        else if (type == COC_MAIN)
        {
          if (is_dfs_defined())
            return top_cod->get_num_decompositions();
          else
            return SPcod.num_decomp;
        }
        else {
          assert(0);
          return 0; // just in case
        }
      }

      size get_block_dims() const
      { return SPcod.get_block_dims(); }

      size get_log_block_dims() const
      { return SPcod.get_log_block_dims(); }

      ui8 get_wavelet_kern() const
      { return SPcod.wavelet_trans; }

      bool is_reversible() const;

      bool is_employing_color_transform() const
      {
        if (type == COD_MAIN || type == COD_TILE)
          return (SGCod.mc_trans == 1);
        else
          return top_cod->is_employing_color_transform();
      }

      size get_precinct_size(ui32 res_num) const
      {
        size t = get_log_precinct_size(res_num);
        return size(1 << t.w, 1 << t.h);
      }

      size get_log_precinct_size(ui32 res_num) const
      {
        if (Scod & 1)
          return SPcod.get_log_precinct_size(res_num);
        else
          return size(15, 15);
      }

      bool packets_may_use_sop() const
      {
        if (type == COD_MAIN || type == COD_TILE)
          return (Scod & 2) == 2;
        return false;
      }

      bool packets_use_eph() const
      {
        if (type == COD_MAIN || type == COD_TILE)
          return (Scod & 4) == 4;
        return false;
      }

      bool get_block_vertical_causality() const
      { return (SPcod.block_style & local::param_cod::VERT_CAUSAL_MODE) != 0; }

      bool write(outfile_base *file);

      bool write_coc(outfile_base *file, ui32 num_comps);

      void read(infile_base *file);

      void read_coc(infile_base* file, ui32 num_comps, param_cod* top_cod);

      void update_atk(param_atk* atk);

      const param_cod* get_coc(ui32 comp_idx) const;

      param_cod* get_coc(ui32 comp_idx);

      param_cod* add_coc_object(ui32 comp_idx);

      const param_atk* access_atk() const { return atk; }
 
    public: // COC_MAIN only functions
      bool is_dfs_defined() const
      { return (SPcod.num_decomp & 0x80) != 0; }

      ui16 get_dfs_index() const  // cannot be more than 15
      { return SPcod.num_decomp & 0xF; }

      ui32 get_comp_idx() const
      {
        assert((type == COC_MAIN && comp_idx != OJPH_COD_DEFAULT) ||
               (type == COD_MAIN && comp_idx == OJPH_COD_DEFAULT));
        return comp_idx;
      }
 
    private:
      void init(param_cod* top_cod, ui16 comp_idx)
      {
        type = top_cod ? COC_MAIN : COD_MAIN;
        Lcod = 0;
        Scod = 0;
        next = NULL;
        atk = NULL;
        this->top_cod = top_cod;
        this->comp_idx = comp_idx;
      }

      void destroy() {
        if (avail)
          delete avail;
        if (next) {
          delete next;
          next = NULL;
        }
      }
 
    private:
      bool internal_write_coc(outfile_base *file, ui32 num_comps);

    private: // Common variables
      cod_type type;        // The type of this cod structure
      ui16 Lcod;            // serves as Lcod and Scod
      ui8 Scod;             // serves as Scod and Scoc
      cod_SGcod SGCod;      // Used in COD and copied to COC
      cod_SPcod SPcod;      // serves as SPcod and SPcoc
      param_cod* next;      // to chain coc parameters to cod
      const param_atk* atk; // used to read transform information
 
    private: // COC only variables
      param_cod* top_cod;   // parent COD structure
      ui16 comp_idx;        // component index of this COC structure
 
    private: // on restart, already allocated param_cod objs are stored here
      param_cod* avail;
    };

    //
    //
    //
    //
    //
    struct param_qcd
    {
      // serves for both QCD and QCC markers
      friend ::ojph::param_qcd;
      enum default_comp_num : ui16 {
        OJPH_QCD_UNKNOWN = 65534,
        OJPH_QCD_DEFAULT = 65535
      };

      enum qcd_type : ui8 {
        UNDEFINED = 0,
        QCD_MAIN  = 1,
        QCC_MAIN  = 2,
        QCD_TILE  = 3,  // not implemented
        QCC_TILE  = 4   // not implemented
      };
 
    public:
      param_qcd(param_qcd* top_qcd = NULL, ui16 comp_idx = OJPH_QCD_DEFAULT)
      { avail = NULL; init(top_qcd, comp_idx); }
      ~param_qcd() { destroy(); }

      void restart()
      {
        param_qcd** p = &avail; // move next to the end of avail
        while (*p != NULL)
          p = &((*p)->next);
        *p = next;
        this->init(top_qcd, OJPH_QCD_DEFAULT);
      }
 
      void check_validity(const param_siz& siz, const param_cod& cod);
      void set_delta(float delta) { base_delta = delta; }
      void set_delta(ui32 comp_idx, float delta);
      ui32 get_num_guard_bits() const;
      ui32 get_MAGB() const;
      ui32 get_Kmax(const param_dfs* dfs, ui32 num_decompositions,
                    ui32 resolution, ui32 subband) const;
      ui32 propose_precision(const param_cod* cod) const;
      float get_irrev_delta(const param_dfs* dfs,
                            ui32 num_decompositions,
                            ui32 resolution, ui32 subband) const;
      bool write(outfile_base *file);
      bool write_qcc(outfile_base *file, ui32 num_comps);
      void read(infile_base *file);
      void read_qcc(infile_base *file, ui32 num_comps);
 
      param_qcd* get_qcc(ui32 comp_idx);
      const param_qcd* get_qcc(ui32 comp_idx) const;
      param_qcd* add_qcc_object(ui32 comp_idx);
      ui16 get_comp_idx() const { return comp_idx; }
 
    private:
      void init(param_qcd* top_qcd, ui16 comp_idx)
      {
        type = top_qcd ? QCC_MAIN : QCD_MAIN;
        Lqcd = 0;
        Sqcd = 0;
        memset(&SPqcd, 0, sizeof(SPqcd));
        num_subbands = 0;
        base_delta = -1.0f;
        enabled = true;
        next = NULL;
        this->top_qcd = top_qcd;
        this->comp_idx = comp_idx;
      }

      void destroy() {
        if (avail)
          delete avail;
        if (next)
        {
          delete next;
          next = NULL;
        }
      }
 
    private:
      void set_rev_quant(ui32 num_decomps, ui32 bit_depth,
                         bool is_employing_color_transform);
      void set_irrev_quant(ui32 num_decomps);
      ui32 get_largest_Kmax() const;
      bool internal_write_qcc(outfile_base *file, ui32 num_comps);
      void trim_non_existing_components(ui32 num_comps);
 
      ui8 decode_SPqcd(ui8 v) const
      { return (ui8)(v >> 3); }
      ui8 encode_SPqcd(ui8 v) const
      { return (ui8)(v << 3); }
 
    private: // QCD variables
      qcd_type type;
      ui16 Lqcd;
      ui8 Sqcd;
      union
      {
        ui8 u8[97];
        ui16 u16[97];
      } SPqcd;
      ui32 num_subbands;  // number of subbands
      float base_delta;   // base quantization step size -- all other
                          // step sizes are derived from it.
      bool enabled;       // enabled if two, and ignored if false
      param_qcd *next;    // pointer to create chains of qcc marker segments
      param_qcd *top_qcd; // pointer to the top QCD (this is the default)
 
    private: // QCC only variables
      ui16 comp_idx;
 
    private:  // on restart, already allocated param_qcd objs are stored here
      param_qcd* avail;
    };

    //
    //
    //
    //
    //
    // data structures used by param_nlt
    struct param_nlt
    {
      using special_comp_num = ojph::param_nlt::special_comp_num;
      using nonlinearity = ojph::param_nlt::nonlinearity;
    public:
      param_nlt() { avail = NULL; init(); }
      ~param_nlt() { destroy(); }

      void restart()
      {
        param_nlt** p = &avail; // move next to the end of avail
        while (*p != NULL)
          p = &((*p)->next);
        *p = next;
        this->init();
      }
 
      void check_validity(param_siz& siz);
      void set_nonlinear_transform(ui32 comp_num, ui8 nl_type);
      bool get_nonlinear_transform(ui32 comp_num, ui8& bit_depth,
                                   bool& is_signed, ui8& nl_type) const;
      bool write(outfile_base* file) const;
      void read(infile_base* file);
 
    private:
      void init()
      {
        Lnlt = 6;
        Cnlt = special_comp_num::ALL_COMPS; // default
        BDnlt = 0;
        Tnlt = nonlinearity::OJPH_NLT_UNDEFINED;
        enabled = false; next = NULL;
      }

      void destroy()
      {
        if (avail)
          delete avail;
        if (next) {
          delete next;
          next = NULL;
        }
      }
 
    private:
      const param_nlt* get_nlt_object(ui32 comp_num) const;
      param_nlt* get_nlt_object(ui32 comp_num);
      param_nlt* add_object(ui32 comp_num);
      bool is_any_enabled() const;
      void trim_non_existing_components(ui32 num_comps);
 
    private:
      ui16 Lnlt;         // length of the marker segment excluding marker
      ui16 Cnlt;         // Component involved in the transformation
      ui8 BDnlt;         // Decoded image component bit depth parameter
      ui8 Tnlt;          // Type of non-linearity
      bool enabled;      // true if this object is used
      param_nlt* next;   // for chaining NLT markers
 
      // The top level param_nlt object is not allocated, but as part of
      // codestream, and is used to manage allocated next objects.
      // next holds a list of param_nlt objects, which are managed by the top
      // param_nlt object.
 
    private: // on restart, already allocated param_nlt objs are stored here
      param_nlt* avail;
    };

    //
    //
    //
    //
    //
    struct param_cap
    {
    public:
      param_cap()
      {
        memset(this, 0, sizeof(param_cap));
        Lcap = 8;
        Pcap = 0x00020000; //for jph, Pcap^15 must be set, the 15th MSB
      }
 
      void check_validity(const param_cod& cod, const param_qcd& qcd)
      {
        if (cod.get_wavelet_kern() == param_cod::DWT_REV53)
          Ccap[0] &= 0xFFDF;
        else
          Ccap[0] |= 0x0020;
        Ccap[0] &= 0xFFE0;
        ui32 Bp = 0;
        ui32 B = qcd.get_MAGB();
        if (B <= 8)
          Bp = 0;
        else if (B < 28)
          Bp = B - 8;
        else
          Bp = 13 + (B >> 2);
        Ccap[0] = (ui16)(Ccap[0] | (ui16)Bp);
      }
 
      bool write(outfile_base *file);
      void read(infile_base *file);
 
    private:
      ui16 Lcap;
      ui32 Pcap;
      ui16 Ccap[32]; //a maximum of 32
    };
 

    //
    //
    //
    //
    //
    struct param_sot
    {
    public:
      void init(ui32 payload_length = 0, ui16 tile_idx = 0,
                ui8 tile_part_index = 0, ui8 num_tile_parts = 0)
      {
        Lsot = 10;
        Psot = payload_length + 12; //total = payload + SOT marker
        Isot = tile_idx;
        TPsot = tile_part_index;
        TNsot = num_tile_parts;
      }
 
      bool write(outfile_base *file, ui32 payload_len);
      bool write(outfile_base *file, ui32 payload_len, ui8 TPsot, ui8 TNsot);
      bool read(infile_base *file, bool resilient);
 
      ui16 get_tile_index() const { return Isot; }
      ui32 get_payload_length() const { return Psot > 0 ? Psot - 12 : 0; }
      ui8  get_tile_part_index() const { return TPsot; }
      ui8  get_num_tile_parts() const { return TNsot; }
 
    private:
      ui16 Lsot;
      ui16 Isot;
      ui32 Psot;
      ui8 TPsot;
      ui8 TNsot;
    };

    //
    //
    //
    //
    //
    struct param_tlm
    {
      struct Ttlm_Ptlm_pair
      {
        ui16 Ttlm;
        ui32 Ptlm;
      };
 
    public:
      param_tlm() { pairs = NULL; num_pairs = 0; next_pair_index = 0; };
      void init(ui32 num_pairs, Ttlm_Ptlm_pair* store);
 
      void set_next_pair(ui16 Ttlm, ui32 Ptlm);
      bool write(outfile_base *file);
 
    private:
      ui16 Ltlm;
      ui8 Ztlm;
      ui8 Stlm;
      Ttlm_Ptlm_pair* pairs;
      ui32 num_pairs;
      ui32 next_pair_index;
    };

    //
    //
    //
    //
    //
    struct param_dfs
    {
    public:
      enum dfs_dwt_type : ui8 {
        NO_DWT    = 0,  // no wavelet transform
        BIDIR_DWT = 1,  // bidirectional DWT (this the conventional DWT)
        HORZ_DWT  = 2,  // horizontal only DWT transform
        VERT_DWT  = 3,  // vertical only DWT transform
      };
 
    public: // member functions
      param_dfs() { avail = NULL; init(); }
      ~param_dfs() { destroy(); }

      void restart()
      {
        param_dfs** p = &avail; // move next to the end of avail
        while (*p != NULL)
          p = &((*p)->next);
        *p = next;
        this->init();
      }
 
      bool read(infile_base *file);
      bool exists() const { return Ldfs != 0; }
 
      // get_dfs return a dfs structure Sdfs == index, or NULL if not found
      const param_dfs* get_dfs(int index) const;
      // decomp_level is the decomposition level, starting from 1 for highest
      // resolution to num_decomps for the coarsest resolution
      dfs_dwt_type get_dwt_type(ui32 decomp_level) const;
      ui32 get_subband_idx(ui32 num_decompositions, ui32 resolution,
                           ui32 subband) const;
      point get_res_downsamp(ui32 skipped_resolutions) const;
 
    private:
      void init()
      { Ldfs = Sdfs = Ids = 0; memset(Ddfs, 0, sizeof(Ddfs)); next = NULL; }

      void destroy()
      {
        if (avail)
          delete avail;
        if (next) {
          delete next;
          next = NULL;
        }
      }
 
    private: // member variables
      ui16 Ldfs;       // length of the segment marker
      ui16 Sdfs;       // index of this DFS marker segment
      ui8 Ids;         // number of elements in Ddfs, 2 bits per sub-level
      ui8 Ddfs[8];     // a string defining number of decomposition sub-levels
                       // 8 bytes should be enough for 32 levels
      param_dfs* next; // used for linking other dfs segments
 
    private: // on restart, already allocated param_dfs objs are stored here
      param_dfs* avail;
    };

    //
    //
    //
    //
    //
    // data structures used by param_atk
 
    union lifting_step {
      struct irv_data {
        // si8 Oatk;     // only for arbitrary filter
        // ui8 LCatk;    // number of lifting coefficients in a step
        float Aatk;      // lifting coefficient
      };
 
      struct rev_data {
        // si8 Oatk;     // only for arbitrary filter, offset of filter
        ui8 Eatk;        // only for reversible, epsilon, the power of 2
        si16 Batk;       // only for reversible, beta, the additive residue
        // ui8 LCatk;    // number of lifting coefficients in a step
        si16 Aatk;       // lifting coefficient
      };
 
      irv_data irv;
      rev_data rev;
    };
 
    struct param_atk
    {
      // Limitations:
      // Arbitrary filters (ARB) are not supported
      // Only one coefficient per step -- first order filter
      // Only even-indexed subsequence in first reconstruction step,
      //   m_init = 0 is supported
    public: // member functions
      param_atk()
      {
        d = d_store;
        max_steps = sizeof(d_store) / sizeof(lifting_step);
        init(NULL);
      }
      ~param_atk()
      {
        if (avail) {
          delete avail;
          avail = NULL;
        }
        if (next) {
          delete next;
          next = NULL;
        }
        if (d != NULL && d != d_store) {
          delete[] d;
          d = d_store;
          max_steps = sizeof(d_store) / sizeof(lifting_step);
        }
      }

      void restart()
      {
        assert(top_atk == NULL);
 
        Latk = Satk = 0;
        Katk = 0.0f;
        Natk = 0;
        if (d == NULL || d == d_store) {
          d = d_store;
          max_steps = sizeof(d_store) / sizeof(lifting_step);
        }
        memset(d, 0, max_steps * sizeof(lifting_step));
 
        param_atk** p = &avail; // move next to the end of avail
        while (*p != NULL)
          p = &((*p)->next);
        *p = next;
 
        next = NULL;
      }
 
      bool read(infile_base *file);
 
      ui8 get_index() const { return (ui8)(Satk & 0xFF); }
      int get_coeff_type() const { return (Satk >> 8) & 0x7; }
      bool is_whole_sample() const { return (Satk & 0x800) != 0; }
      bool is_reversible() const { return (Satk & 0x1000) != 0; }
      bool is_m_init0() const { return (Satk & 0x2000) == 0; }
      bool is_using_ws_extension() const { return (Satk & 0x4000) != 0; }
      param_atk* get_atk(int index);
      const lifting_step* get_step(ui32 s) const
      { assert(s < Natk); return d + s; }
      ui32 get_num_steps() const { return Natk; }
      float get_K() const { return Katk; }
 
  private:
      void init(param_atk* top_atk)
      {
        Latk = Satk = 0;
        Katk = 0.0f;
        Natk = 0;
        if (d == NULL || d == d_store) {
          d = d_store;
          max_steps = sizeof(d_store) / sizeof(lifting_step);
        }
        memset(d, 0, max_steps * sizeof(lifting_step));
        next = NULL;
        this->top_atk = top_atk;
        avail = NULL;
      }
  private:
      bool read_coefficient(infile_base *file, float &K, si32& bytes);
      bool read_coefficient(infile_base *file, si16 &K, si32& bytes);
 
      void init_irv97();
      void init_rev53();
      param_atk* add_object();
 
    private: // member variables
      ui16 Latk;         // structure length
      ui16 Satk;         // carries a variety of information
      float Katk;        // only for irreversible scaling factor K
      ui8 Natk;          // number of lifting steps
      lifting_step* d;   // pointer to data, initialized to d_store
      ui32 max_steps;    // maximum number of steps without memory allocation
      lifting_step d_store[6];   // lifting step coefficient
      param_atk* next;   // used for chaining if more than one atk segment
                         // exist in the codestream
      param_atk* top_atk;// This is the top level atk, from which all atk
                         // objects are derived
 
    private: // on restart, already allocated param_atk objs are stored here
      param_atk* avail;
    };
  } // !local namespace
} // !ojph namespace
 
#endif // !OJPH_PARAMS_LOCAL_H