/src/freeimage-svn/FreeImage/trunk/Source/LibOpenJPEG/pi.c

Source
/*
 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2007, Professor Benoit Macq
 * Copyright (c) 2001-2003, David Janssens
 * Copyright (c) 2002-2003, Yannick Verschueren
 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
 * Copyright (c) 2005, Herve Drolon, FreeImage Team
 * Copyright (c) 2006-2007, Parvatha Elangovan
 * All rights reserved.
 *
 * 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 OWNER 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 LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "opj_includes.h"

/** @defgroup PI PI - Implementation of a packet iterator */
/*@{*/

/** @name Local static functions */
/*@{*/

/**
Get next packet in layer-resolution-component-precinct order.
@param pi packet iterator to modify
@return returns false if pi pointed to the last packet or else returns true
*/
static OPJ_BOOL opj_pi_next_lrcp(opj_pi_iterator_t * pi);
/**
Get next packet in resolution-layer-component-precinct order.
@param pi packet iterator to modify
@return returns false if pi pointed to the last packet or else returns true
*/
static OPJ_BOOL opj_pi_next_rlcp(opj_pi_iterator_t * pi);
/**
Get next packet in resolution-precinct-component-layer order.
@param pi packet iterator to modify
@return returns false if pi pointed to the last packet or else returns true
*/
static OPJ_BOOL opj_pi_next_rpcl(opj_pi_iterator_t * pi);
/**
Get next packet in precinct-component-resolution-layer order.
@param pi packet iterator to modify
@return returns false if pi pointed to the last packet or else returns true
*/
static OPJ_BOOL opj_pi_next_pcrl(opj_pi_iterator_t * pi);
/**
Get next packet in component-precinct-resolution-layer order.
@param pi packet iterator to modify
@return returns false if pi pointed to the last packet or else returns true
*/
static OPJ_BOOL opj_pi_next_cprl(opj_pi_iterator_t * pi);

/**
 * Updates the coding parameters if the encoding is used with Progression order changes and final (or cinema parameters are used).
 *
 * @param p_cp    the coding parameters to modify
 * @param p_tileno  the tile index being concerned.
 * @param p_tx0   X0 parameter for the tile
 * @param p_tx1   X1 parameter for the tile
 * @param p_ty0   Y0 parameter for the tile
 * @param p_ty1   Y1 parameter for the tile
 * @param p_max_prec  the maximum precision for all the bands of the tile
 * @param p_max_res the maximum number of resolutions for all the poc inside the tile.
 * @param p_dx_min    the minimum dx of all the components of all the resolutions for the tile.
 * @param p_dy_min    the minimum dy of all the components of all the resolutions for the tile.
 */
static void opj_pi_update_encode_poc_and_final ( opj_cp_t *p_cp,
                                                 OPJ_UINT32 p_tileno,
                                                 OPJ_INT32 p_tx0,
                                                 OPJ_INT32 p_tx1,
                                                 OPJ_INT32 p_ty0,
                                                 OPJ_INT32 p_ty1,
                                                 OPJ_UINT32 p_max_prec,
                                                 OPJ_UINT32 p_max_res,
                                                 OPJ_UINT32 p_dx_min,
                                                 OPJ_UINT32 p_dy_min);

/**
 * Updates the coding parameters if the encoding is not used with Progression order changes and final (and cinema parameters are used).
 *
 * @param p_cp    the coding parameters to modify
 * @param p_num_comps   the number of components
 * @param p_tileno  the tile index being concerned.
 * @param p_tx0   X0 parameter for the tile
 * @param p_tx1   X1 parameter for the tile
 * @param p_ty0   Y0 parameter for the tile
 * @param p_ty1   Y1 parameter for the tile
 * @param p_max_prec  the maximum precision for all the bands of the tile
 * @param p_max_res the maximum number of resolutions for all the poc inside the tile.
 * @param p_dx_min    the minimum dx of all the components of all the resolutions for the tile.
 * @param p_dy_min    the minimum dy of all the components of all the resolutions for the tile.
 */
static void opj_pi_update_encode_not_poc (  opj_cp_t *p_cp,
                                            OPJ_UINT32 p_num_comps,
                                            OPJ_UINT32 p_tileno,
                                            OPJ_INT32 p_tx0,
                                            OPJ_INT32 p_tx1,
                                            OPJ_INT32 p_ty0,
                                            OPJ_INT32 p_ty1,
                                            OPJ_UINT32 p_max_prec,
                                            OPJ_UINT32 p_max_res,
                                            OPJ_UINT32 p_dx_min,
                                            OPJ_UINT32 p_dy_min);
/**
 * Gets the encoding parameters needed to update the coding parameters and all the pocs.
 * 
 * @param p_image     the image being encoded.
 * @param p_cp      the coding parameters.
 * @param tileno      the tile index of the tile being encoded.
 * @param p_tx0     pointer that will hold the X0 parameter for the tile
 * @param p_tx1     pointer that will hold the X1 parameter for the tile
 * @param p_ty0     pointer that will hold the Y0 parameter for the tile
 * @param p_ty1     pointer that will hold the Y1 parameter for the tile
 * @param p_max_prec    pointer that will hold the the maximum precision for all the bands of the tile
 * @param p_max_res   pointer that will hold the the maximum number of resolutions for all the poc inside the tile.
 * @param p_dx_min      pointer that will hold the the minimum dx of all the components of all the resolutions for the tile.
 * @param p_dy_min      pointer that will hold the the minimum dy of all the components of all the resolutions for the tile.
 */
static void opj_get_encoding_parameters(const opj_image_t *p_image,
                                        const opj_cp_t *p_cp,
                                        OPJ_UINT32  tileno,
                                        OPJ_INT32  * p_tx0,
                                        OPJ_INT32 * p_tx1,
                                        OPJ_INT32 * p_ty0,
                                        OPJ_INT32 * p_ty1,
                                        OPJ_UINT32 * p_dx_min,
                                        OPJ_UINT32 * p_dy_min,
                                        OPJ_UINT32 * p_max_prec,
                                        OPJ_UINT32 * p_max_res );

/**
 * Gets the encoding parameters needed to update the coding parameters and all the pocs.
 * The precinct widths, heights, dx and dy for each component at each resolution will be stored as well.
 * the last parameter of the function should be an array of pointers of size nb components, each pointer leading
 * to an area of size 4 * max_res. The data is stored inside this area with the following pattern :
 * dx_compi_res0 , dy_compi_res0 , w_compi_res0, h_compi_res0 , dx_compi_res1 , dy_compi_res1 , w_compi_res1, h_compi_res1 , ...
 *
 * @param p_image     the image being encoded.
 * @param p_cp      the coding parameters.
 * @param tileno      the tile index of the tile being encoded.
 * @param p_tx0     pointer that will hold the X0 parameter for the tile
 * @param p_tx1     pointer that will hold the X1 parameter for the tile
 * @param p_ty0     pointer that will hold the Y0 parameter for the tile
 * @param p_ty1     pointer that will hold the Y1 parameter for the tile
 * @param p_max_prec    pointer that will hold the the maximum precision for all the bands of the tile
 * @param p_max_res   pointer that will hold the the maximum number of resolutions for all the poc inside the tile.
 * @param p_dx_min    pointer that will hold the the minimum dx of all the components of all the resolutions for the tile.
 * @param p_dy_min    pointer that will hold the the minimum dy of all the components of all the resolutions for the tile.
 * @param p_resolutions pointer to an area corresponding to the one described above.
 */
static void opj_get_all_encoding_parameters(const opj_image_t *p_image,
                                            const opj_cp_t *p_cp,
                                            OPJ_UINT32 tileno,
                                            OPJ_INT32 * p_tx0,
                                            OPJ_INT32 * p_tx1,
                                            OPJ_INT32 * p_ty0,
                                            OPJ_INT32 * p_ty1,
                                            OPJ_UINT32 * p_dx_min,
                                            OPJ_UINT32 * p_dy_min,
                                            OPJ_UINT32 * p_max_prec,
                                            OPJ_UINT32 * p_max_res,
                                            OPJ_UINT32 ** p_resolutions );
/**
 * Allocates memory for a packet iterator. Data and data sizes are set by this operation.
 * No other data is set. The include section of the packet  iterator is not allocated.
 * 
 * @param p_image   the image used to initialize the packet iterator (in fact only the number of components is relevant.
 * @param p_cp    the coding parameters.
 * @param tileno  the index of the tile from which creating the packet iterator.
 */
static opj_pi_iterator_t * opj_pi_create( const opj_image_t *p_image,
                                            const opj_cp_t *p_cp,
                                            OPJ_UINT32 tileno );
/**
 * FIXME DOC
 */
static void opj_pi_update_decode_not_poc (opj_pi_iterator_t * p_pi,
                                          opj_tcp_t * p_tcp,
                                          OPJ_UINT32 p_max_precision,
                                          OPJ_UINT32 p_max_res);
/**
 * FIXME DOC
 */
static void opj_pi_update_decode_poc (  opj_pi_iterator_t * p_pi,
                                        opj_tcp_t * p_tcp,
                                        OPJ_UINT32 p_max_precision,
                                        OPJ_UINT32 p_max_res);

/**
 * FIXME DOC
 */
OPJ_BOOL opj_pi_check_next_level( OPJ_INT32 pos,
                opj_cp_t *cp,
                OPJ_UINT32 tileno,
                OPJ_UINT32 pino,
                const OPJ_CHAR *prog);

/*@}*/

/*@}*/

/*
==========================================================
   local functions
==========================================================
*/

OPJ_BOOL opj_pi_next_lrcp(opj_pi_iterator_t * pi) {
  opj_pi_comp_t *comp = NULL;
  opj_pi_resolution_t *res = NULL;
  OPJ_UINT32 index = 0;
  
  if (!pi->first) {
    comp = &pi->comps[pi->compno];
    res = &comp->resolutions[pi->resno];
    goto LABEL_SKIP;
  } else {
    pi->first = 0;
  }

  for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
    for (pi->resno = pi->poc.resno0; pi->resno < pi->poc.resno1;
    pi->resno++) {
      for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
        comp = &pi->comps[pi->compno];
        if (pi->resno >= comp->numresolutions) {
          continue;
        }
        res = &comp->resolutions[pi->resno];
        if (!pi->tp_on){
          pi->poc.precno1 = res->pw * res->ph;
        }
        for (pi->precno = pi->poc.precno0; pi->precno < pi->poc.precno1; pi->precno++) {
          index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
          if (!pi->include[index]) {
            pi->include[index] = 1;
            return OPJ_TRUE;
          }
LABEL_SKIP:;
        }
      }
    }
  }
  
  return OPJ_FALSE;
}

OPJ_BOOL opj_pi_next_rlcp(opj_pi_iterator_t * pi) {
  opj_pi_comp_t *comp = NULL;
  opj_pi_resolution_t *res = NULL;
  OPJ_UINT32 index = 0;

  if (!pi->first) {
    comp = &pi->comps[pi->compno];
    res = &comp->resolutions[pi->resno];
    goto LABEL_SKIP;
  } else {
    pi->first = 0;
  }

  for (pi->resno = pi->poc.resno0; pi->resno < pi->poc.resno1; pi->resno++) {
    for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
      for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
        comp = &pi->comps[pi->compno];
        if (pi->resno >= comp->numresolutions) {
          continue;
        }
        res = &comp->resolutions[pi->resno];
        if(!pi->tp_on){
          pi->poc.precno1 = res->pw * res->ph;
        }
        for (pi->precno = pi->poc.precno0; pi->precno < pi->poc.precno1; pi->precno++) {
          index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
          if (!pi->include[index]) {
            pi->include[index] = 1;
            return OPJ_TRUE;
          }
LABEL_SKIP:;
        }
      }
    }
  }
  
  return OPJ_FALSE;
}

OPJ_BOOL opj_pi_next_rpcl(opj_pi_iterator_t * pi) {
  opj_pi_comp_t *comp = NULL;
  opj_pi_resolution_t *res = NULL;
  OPJ_UINT32 index = 0;

  if (!pi->first) {
    goto LABEL_SKIP;
  } else {
    OPJ_UINT32 compno, resno;
    pi->first = 0;
    pi->dx = 0;
    pi->dy = 0;
    for (compno = 0; compno < pi->numcomps; compno++) {
      comp = &pi->comps[compno];
      for (resno = 0; resno < comp->numresolutions; resno++) {
        OPJ_UINT32 dx, dy;
        res = &comp->resolutions[resno];
        dx = comp->dx * (1u << (res->pdx + comp->numresolutions - 1 - resno));
        dy = comp->dy * (1u << (res->pdy + comp->numresolutions - 1 - resno));
        pi->dx = !pi->dx ? dx : opj_uint_min(pi->dx, dx);
        pi->dy = !pi->dy ? dy : opj_uint_min(pi->dy, dy);
      }
    }
  }
if (!pi->tp_on){
      pi->poc.ty0 = pi->ty0;
      pi->poc.tx0 = pi->tx0;
      pi->poc.ty1 = pi->ty1;
      pi->poc.tx1 = pi->tx1;
    }
  for (pi->resno = pi->poc.resno0; pi->resno < pi->poc.resno1; pi->resno++) {
    for (pi->y = pi->poc.ty0; pi->y < pi->poc.ty1; pi->y += (OPJ_INT32)(pi->dy - (OPJ_UINT32)(pi->y % (OPJ_INT32)pi->dy))) {
      for (pi->x = pi->poc.tx0; pi->x < pi->poc.tx1; pi->x += (OPJ_INT32)(pi->dx - (OPJ_UINT32)(pi->x % (OPJ_INT32)pi->dx))) {
        for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
          OPJ_UINT32 levelno;
          OPJ_INT32 trx0, try0;
          OPJ_INT32  trx1, try1;
          OPJ_UINT32  rpx, rpy;
          OPJ_INT32  prci, prcj;
          comp = &pi->comps[pi->compno];
          if (pi->resno >= comp->numresolutions) {
            continue;
          }
          res = &comp->resolutions[pi->resno];
          levelno = comp->numresolutions - 1 - pi->resno;
          trx0 = opj_int_ceildiv(pi->tx0, (OPJ_INT32)(comp->dx << levelno));
          try0 = opj_int_ceildiv(pi->ty0, (OPJ_INT32)(comp->dy << levelno));
          trx1 = opj_int_ceildiv(pi->tx1, (OPJ_INT32)(comp->dx << levelno));
          try1 = opj_int_ceildiv(pi->ty1, (OPJ_INT32)(comp->dy << levelno));
          rpx = res->pdx + levelno;
          rpy = res->pdy + levelno;
          if (!((pi->y % (OPJ_INT32)(comp->dy << rpy) == 0) || ((pi->y == pi->ty0) && ((try0 << levelno) % (1 << rpy))))){
            continue; 
          }
          if (!((pi->x % (OPJ_INT32)(comp->dx << rpx) == 0) || ((pi->x == pi->tx0) && ((trx0 << levelno) % (1 << rpx))))){
            continue;
          }
          
          if ((res->pw==0)||(res->ph==0)) continue;
          
          if ((trx0==trx1)||(try0==try1)) continue;
          
          prci = opj_int_floordivpow2(opj_int_ceildiv(pi->x, (OPJ_INT32)(comp->dx << levelno)), (OPJ_INT32)res->pdx)
             - opj_int_floordivpow2(trx0, (OPJ_INT32)res->pdx);
          prcj = opj_int_floordivpow2(opj_int_ceildiv(pi->y, (OPJ_INT32)(comp->dy << levelno)), (OPJ_INT32)res->pdy)
             - opj_int_floordivpow2(try0, (OPJ_INT32)res->pdy);
          pi->precno = (OPJ_UINT32)(prci + prcj * (OPJ_INT32)res->pw);
          for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
            index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
            if (!pi->include[index]) {
              pi->include[index] = 1;
              return OPJ_TRUE;
            }
LABEL_SKIP:;
          }
        }
      }
    }
  }
  
  return OPJ_FALSE;
}

OPJ_BOOL opj_pi_next_pcrl(opj_pi_iterator_t * pi) {
  opj_pi_comp_t *comp = NULL;
  opj_pi_resolution_t *res = NULL;
  OPJ_UINT32 index = 0;

  if (!pi->first) {
    comp = &pi->comps[pi->compno];
    goto LABEL_SKIP;
  } else {
    OPJ_UINT32 compno, resno;
    pi->first = 0;
    pi->dx = 0;
    pi->dy = 0;
    for (compno = 0; compno < pi->numcomps; compno++) {
      comp = &pi->comps[compno];
      for (resno = 0; resno < comp->numresolutions; resno++) {
        OPJ_UINT32 dx, dy;
        res = &comp->resolutions[resno];
        dx = comp->dx * (1u << (res->pdx + comp->numresolutions - 1 - resno));
        dy = comp->dy * (1u << (res->pdy + comp->numresolutions - 1 - resno));
        pi->dx = !pi->dx ? dx : opj_uint_min(pi->dx, dx);
        pi->dy = !pi->dy ? dy : opj_uint_min(pi->dy, dy);
      }
    }
  }
  if (!pi->tp_on){
      pi->poc.ty0 = pi->ty0;
      pi->poc.tx0 = pi->tx0;
      pi->poc.ty1 = pi->ty1;
      pi->poc.tx1 = pi->tx1;
    }
  for (pi->y = pi->poc.ty0; pi->y < pi->poc.ty1; pi->y += (OPJ_INT32)(pi->dy - (OPJ_UINT32)(pi->y % (OPJ_INT32)pi->dy))) {
    for (pi->x = pi->poc.tx0; pi->x < pi->poc.tx1; pi->x += (OPJ_INT32)(pi->dx - (OPJ_UINT32)(pi->x % (OPJ_INT32)pi->dx))) {
      for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
        comp = &pi->comps[pi->compno];
        for (pi->resno = pi->poc.resno0; pi->resno < opj_uint_min(pi->poc.resno1, comp->numresolutions); pi->resno++) {
          OPJ_UINT32 levelno;
          OPJ_INT32 trx0, try0;
          OPJ_INT32 trx1, try1;
          OPJ_UINT32 rpx, rpy;
          OPJ_INT32 prci, prcj;
          res = &comp->resolutions[pi->resno];
          levelno = comp->numresolutions - 1 - pi->resno;
          trx0 = opj_int_ceildiv(pi->tx0, (OPJ_INT32)(comp->dx << levelno));
          try0 = opj_int_ceildiv(pi->ty0, (OPJ_INT32)(comp->dy << levelno));
          trx1 = opj_int_ceildiv(pi->tx1, (OPJ_INT32)(comp->dx << levelno));
          try1 = opj_int_ceildiv(pi->ty1, (OPJ_INT32)(comp->dy << levelno));
          rpx = res->pdx + levelno;
          rpy = res->pdy + levelno;
          if (!((pi->y % (OPJ_INT32)(comp->dy << rpy) == 0) || ((pi->y == pi->ty0) && ((try0 << levelno) % (1 << rpy))))){
            continue; 
          }
          if (!((pi->x % (OPJ_INT32)(comp->dx << rpx) == 0) || ((pi->x == pi->tx0) && ((trx0 << levelno) % (1 << rpx))))){
            continue;
          }
          
          if ((res->pw==0)||(res->ph==0)) continue;
          
          if ((trx0==trx1)||(try0==try1)) continue;
          
          prci = opj_int_floordivpow2(opj_int_ceildiv(pi->x, (OPJ_INT32)(comp->dx << levelno)), (OPJ_INT32)res->pdx)
             - opj_int_floordivpow2(trx0, (OPJ_INT32)res->pdx);
          prcj = opj_int_floordivpow2(opj_int_ceildiv(pi->y, (OPJ_INT32)(comp->dy << levelno)), (OPJ_INT32)res->pdy)
             - opj_int_floordivpow2(try0, (OPJ_INT32)res->pdy);
          pi->precno = (OPJ_UINT32)(prci + prcj * (OPJ_INT32)res->pw);
          for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
            index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
            if (!pi->include[index]) {
              pi->include[index] = 1;
              return OPJ_TRUE;
            } 
LABEL_SKIP:;
          }
        }
      }
    }
  }
  
  return OPJ_FALSE;
}

OPJ_BOOL opj_pi_next_cprl(opj_pi_iterator_t * pi) {
  opj_pi_comp_t *comp = NULL;
  opj_pi_resolution_t *res = NULL;
  OPJ_UINT32 index = 0;

  if (!pi->first) {
    comp = &pi->comps[pi->compno];
    goto LABEL_SKIP;
  } else {
    pi->first = 0;
  }

  for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
    OPJ_UINT32 resno;
    comp = &pi->comps[pi->compno];
    pi->dx = 0;
    pi->dy = 0;
    for (resno = 0; resno < comp->numresolutions; resno++) {
      OPJ_UINT32 dx, dy;
      res = &comp->resolutions[resno];
      dx = comp->dx * (1u << (res->pdx + comp->numresolutions - 1 - resno));
      dy = comp->dy * (1u << (res->pdy + comp->numresolutions - 1 - resno));
      pi->dx = !pi->dx ? dx : opj_uint_min(pi->dx, dx);
      pi->dy = !pi->dy ? dy : opj_uint_min(pi->dy, dy);
    }
    if (!pi->tp_on){
      pi->poc.ty0 = pi->ty0;
      pi->poc.tx0 = pi->tx0;
      pi->poc.ty1 = pi->ty1;
      pi->poc.tx1 = pi->tx1;
    }
    for (pi->y = pi->poc.ty0; pi->y < pi->poc.ty1; pi->y += (OPJ_INT32)(pi->dy - (OPJ_UINT32)(pi->y % (OPJ_INT32)pi->dy))) {
      for (pi->x = pi->poc.tx0; pi->x < pi->poc.tx1; pi->x += (OPJ_INT32)(pi->dx - (OPJ_UINT32)(pi->x % (OPJ_INT32)pi->dx))) {
        for (pi->resno = pi->poc.resno0; pi->resno < opj_uint_min(pi->poc.resno1, comp->numresolutions); pi->resno++) {
          OPJ_UINT32 levelno;
          OPJ_INT32 trx0, try0;
          OPJ_INT32 trx1, try1;
          OPJ_UINT32 rpx, rpy;
          OPJ_INT32 prci, prcj;
          res = &comp->resolutions[pi->resno];
          levelno = comp->numresolutions - 1 - pi->resno;
          trx0 = opj_int_ceildiv(pi->tx0, (OPJ_INT32)(comp->dx << levelno));
          try0 = opj_int_ceildiv(pi->ty0, (OPJ_INT32)(comp->dy << levelno));
          trx1 = opj_int_ceildiv(pi->tx1, (OPJ_INT32)(comp->dx << levelno));
          try1 = opj_int_ceildiv(pi->ty1, (OPJ_INT32)(comp->dy << levelno));
          rpx = res->pdx + levelno;
          rpy = res->pdy + levelno;
          if (!((pi->y % (OPJ_INT32)(comp->dy << rpy) == 0) || ((pi->y == pi->ty0) && ((try0 << levelno) % (1 << rpy))))){
            continue; 
          }
          if (!((pi->x % (OPJ_INT32)(comp->dx << rpx) == 0) || ((pi->x == pi->tx0) && ((trx0 << levelno) % (1 << rpx))))){
            continue;
          }
          
          if ((res->pw==0)||(res->ph==0)) continue;
          
          if ((trx0==trx1)||(try0==try1)) continue;
          
          prci = opj_int_floordivpow2(opj_int_ceildiv(pi->x, (OPJ_INT32)(comp->dx << levelno)), (OPJ_INT32)res->pdx)
             - opj_int_floordivpow2(trx0, (OPJ_INT32)res->pdx);
          prcj = opj_int_floordivpow2(opj_int_ceildiv(pi->y, (OPJ_INT32)(comp->dy << levelno)), (OPJ_INT32)res->pdy)
             - opj_int_floordivpow2(try0, (OPJ_INT32)res->pdy);
          pi->precno = (OPJ_UINT32)(prci + prcj * (OPJ_INT32)res->pw);
          for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
            index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
            if (!pi->include[index]) {
              pi->include[index] = 1;
              return OPJ_TRUE;
            }
LABEL_SKIP:;
          }
        }
      }
    }
  }
  
  return OPJ_FALSE;
}

void opj_get_encoding_parameters( const opj_image_t *p_image,
                                    const opj_cp_t *p_cp,
                                    OPJ_UINT32 p_tileno,
                                    OPJ_INT32 * p_tx0,
                                    OPJ_INT32  * p_tx1,
                                    OPJ_INT32  * p_ty0,
                                    OPJ_INT32  * p_ty1,
                                    OPJ_UINT32 * p_dx_min,
                                    OPJ_UINT32 * p_dy_min,
                                    OPJ_UINT32 * p_max_prec,
                                    OPJ_UINT32 * p_max_res )
{
  /* loop */
  OPJ_UINT32  compno, resno;
  /* pointers */
  const opj_tcp_t *l_tcp = 00;
  const opj_tccp_t * l_tccp = 00;
  const opj_image_comp_t * l_img_comp = 00;

  /* position in x and y of tile */
  OPJ_UINT32 p, q;

  /* preconditions */
  assert(p_cp != 00);
  assert(p_image != 00);
  assert(p_tileno < p_cp->tw * p_cp->th);

  /* initializations */
  l_tcp = &p_cp->tcps [p_tileno];
  l_img_comp = p_image->comps;
  l_tccp = l_tcp->tccps;

  /* here calculation of tx0, tx1, ty0, ty1, maxprec, dx and dy */
  p = p_tileno % p_cp->tw;
  q = p_tileno / p_cp->tw;

  /* find extent of tile */
  *p_tx0 = opj_int_max((OPJ_INT32)(p_cp->tx0 + p * p_cp->tdx), (OPJ_INT32)p_image->x0);
  *p_tx1 = opj_int_min((OPJ_INT32)(p_cp->tx0 + (p + 1) * p_cp->tdx), (OPJ_INT32)p_image->x1);
  *p_ty0 = opj_int_max((OPJ_INT32)(p_cp->ty0 + q * p_cp->tdy), (OPJ_INT32)p_image->y0);
  *p_ty1 = opj_int_min((OPJ_INT32)(p_cp->ty0 + (q + 1) * p_cp->tdy), (OPJ_INT32)p_image->y1);

  /* max precision is 0 (can only grow) */
  *p_max_prec = 0;
  *p_max_res = 0;

  /* take the largest value for dx_min and dy_min */
  *p_dx_min = 0x7fffffff;
  *p_dy_min  = 0x7fffffff;

  for (compno = 0; compno < p_image->numcomps; ++compno) {
    /* arithmetic variables to calculate */
    OPJ_UINT32 l_level_no;
    OPJ_INT32 l_rx0, l_ry0, l_rx1, l_ry1;
    OPJ_INT32 l_px0, l_py0, l_px1, py1;
    OPJ_UINT32 l_pdx, l_pdy;
    OPJ_UINT32 l_pw, l_ph;
    OPJ_UINT32 l_product;
    OPJ_INT32 l_tcx0, l_tcy0, l_tcx1, l_tcy1;

    l_tcx0 = opj_int_ceildiv(*p_tx0, (OPJ_INT32)l_img_comp->dx);
    l_tcy0 = opj_int_ceildiv(*p_ty0, (OPJ_INT32)l_img_comp->dy);
    l_tcx1 = opj_int_ceildiv(*p_tx1, (OPJ_INT32)l_img_comp->dx);
    l_tcy1 = opj_int_ceildiv(*p_ty1, (OPJ_INT32)l_img_comp->dy);

    if (l_tccp->numresolutions > *p_max_res) {
      *p_max_res = l_tccp->numresolutions;
    }

    /* use custom size for precincts */
    for (resno = 0; resno < l_tccp->numresolutions; ++resno) {
      OPJ_UINT32 l_dx, l_dy;

      /* precinct width and height */
      l_pdx = l_tccp->prcw[resno];
      l_pdy = l_tccp->prch[resno];

      l_dx = l_img_comp->dx * (1u << (l_pdx + l_tccp->numresolutions - 1 - resno));
      l_dy = l_img_comp->dy * (1u << (l_pdy + l_tccp->numresolutions - 1 - resno));

      /* take the minimum size for dx for each comp and resolution */
      *p_dx_min = opj_uint_min(*p_dx_min, l_dx);
      *p_dy_min = opj_uint_min(*p_dy_min, l_dy);

      /* various calculations of extents */
      l_level_no = l_tccp->numresolutions - 1 - resno;

      l_rx0 = opj_int_ceildivpow2(l_tcx0, (OPJ_INT32)l_level_no);
      l_ry0 = opj_int_ceildivpow2(l_tcy0, (OPJ_INT32)l_level_no);
      l_rx1 = opj_int_ceildivpow2(l_tcx1, (OPJ_INT32)l_level_no);
      l_ry1 = opj_int_ceildivpow2(l_tcy1, (OPJ_INT32)l_level_no);

      l_px0 = opj_int_floordivpow2(l_rx0, (OPJ_INT32)l_pdx) << l_pdx;
      l_py0 = opj_int_floordivpow2(l_ry0, (OPJ_INT32)l_pdy) << l_pdy;
      l_px1 = opj_int_ceildivpow2(l_rx1, (OPJ_INT32)l_pdx) << l_pdx;

      py1 = opj_int_ceildivpow2(l_ry1, (OPJ_INT32)l_pdy) << l_pdy;

      l_pw = (l_rx0==l_rx1)?0:(OPJ_UINT32)((l_px1 - l_px0) >> l_pdx);
      l_ph = (l_ry0==l_ry1)?0:(OPJ_UINT32)((py1 - l_py0) >> l_pdy);

      l_product = l_pw * l_ph;

      /* update precision */
      if (l_product > *p_max_prec) {
        *p_max_prec = l_product;
      }
    }
    ++l_img_comp;
    ++l_tccp;
  }
}


void opj_get_all_encoding_parameters(   const opj_image_t *p_image,
                                        const opj_cp_t *p_cp,
                                        OPJ_UINT32 tileno,
                                        OPJ_INT32 * p_tx0,
                                        OPJ_INT32 * p_tx1,
                                        OPJ_INT32 * p_ty0,
                                        OPJ_INT32 * p_ty1,
                                        OPJ_UINT32 * p_dx_min,
                                        OPJ_UINT32 * p_dy_min,
                                        OPJ_UINT32 * p_max_prec,
                                        OPJ_UINT32 * p_max_res,
                                        OPJ_UINT32 ** p_resolutions )
{
  /* loop*/
  OPJ_UINT32 compno, resno;

  /* pointers*/
  const opj_tcp_t *tcp = 00;
  const opj_tccp_t * l_tccp = 00;
  const opj_image_comp_t * l_img_comp = 00;

  /* to store l_dx, l_dy, w and h for each resolution and component.*/
  OPJ_UINT32 * lResolutionPtr;

  /* position in x and y of tile*/
  OPJ_UINT32 p, q;

  /* preconditions in debug*/
  assert(p_cp != 00);
  assert(p_image != 00);
  assert(tileno < p_cp->tw * p_cp->th);

  /* initializations*/
  tcp = &p_cp->tcps [tileno];
  l_tccp = tcp->tccps;
  l_img_comp = p_image->comps;

  /* position in x and y of tile*/
  p = tileno % p_cp->tw;
  q = tileno / p_cp->tw;

  /* here calculation of tx0, tx1, ty0, ty1, maxprec, l_dx and l_dy */
  *p_tx0 = opj_int_max((OPJ_INT32)(p_cp->tx0 + p * p_cp->tdx), (OPJ_INT32)p_image->x0);
  *p_tx1 = opj_int_min((OPJ_INT32)(p_cp->tx0 + (p + 1) * p_cp->tdx), (OPJ_INT32)p_image->x1);
  *p_ty0 = opj_int_max((OPJ_INT32)(p_cp->ty0 + q * p_cp->tdy), (OPJ_INT32)p_image->y0);
  *p_ty1 = opj_int_min((OPJ_INT32)(p_cp->ty0 + (q + 1) * p_cp->tdy), (OPJ_INT32)p_image->y1);

  /* max precision and resolution is 0 (can only grow)*/
  *p_max_prec = 0;
  *p_max_res = 0;

  /* take the largest value for dx_min and dy_min*/
  *p_dx_min = 0x7fffffff;
  *p_dy_min = 0x7fffffff;

  for (compno = 0; compno < p_image->numcomps; ++compno) {
    /* aritmetic variables to calculate*/
    OPJ_UINT32 l_level_no;
    OPJ_INT32 l_rx0, l_ry0, l_rx1, l_ry1;
    OPJ_INT32 l_px0, l_py0, l_px1, py1;
    OPJ_UINT32 l_product;
    OPJ_INT32 l_tcx0, l_tcy0, l_tcx1, l_tcy1;
    OPJ_UINT32 l_pdx, l_pdy , l_pw , l_ph;

    lResolutionPtr = p_resolutions[compno];

    l_tcx0 = opj_int_ceildiv(*p_tx0, (OPJ_INT32)l_img_comp->dx);
    l_tcy0 = opj_int_ceildiv(*p_ty0, (OPJ_INT32)l_img_comp->dy);
    l_tcx1 = opj_int_ceildiv(*p_tx1, (OPJ_INT32)l_img_comp->dx);
    l_tcy1 = opj_int_ceildiv(*p_ty1, (OPJ_INT32)l_img_comp->dy);

    if (l_tccp->numresolutions > *p_max_res) {
      *p_max_res = l_tccp->numresolutions;
    }

    /* use custom size for precincts*/
    l_level_no = l_tccp->numresolutions - 1;
    for (resno = 0; resno < l_tccp->numresolutions; ++resno) {
      OPJ_UINT32 l_dx, l_dy;

      /* precinct width and height*/
      l_pdx = l_tccp->prcw[resno];
      l_pdy = l_tccp->prch[resno];
      *lResolutionPtr++ = l_pdx;
      *lResolutionPtr++ = l_pdy;
      l_dx = l_img_comp->dx * (1u << (l_pdx + l_level_no));
      l_dy = l_img_comp->dy * (1u << (l_pdy + l_level_no));
      /* take the minimum size for l_dx for each comp and resolution*/
      *p_dx_min = (OPJ_UINT32)opj_int_min((OPJ_INT32)*p_dx_min, (OPJ_INT32)l_dx);
      *p_dy_min = (OPJ_UINT32)opj_int_min((OPJ_INT32)*p_dy_min, (OPJ_INT32)l_dy);

      /* various calculations of extents*/
      l_rx0 = opj_int_ceildivpow2(l_tcx0, (OPJ_INT32)l_level_no);
      l_ry0 = opj_int_ceildivpow2(l_tcy0, (OPJ_INT32)l_level_no);
      l_rx1 = opj_int_ceildivpow2(l_tcx1, (OPJ_INT32)l_level_no);
      l_ry1 = opj_int_ceildivpow2(l_tcy1, (OPJ_INT32)l_level_no);
      l_px0 = opj_int_floordivpow2(l_rx0, (OPJ_INT32)l_pdx) << l_pdx;
      l_py0 = opj_int_floordivpow2(l_ry0, (OPJ_INT32)l_pdy) << l_pdy;
      l_px1 = opj_int_ceildivpow2(l_rx1, (OPJ_INT32)l_pdx) << l_pdx;
      py1 = opj_int_ceildivpow2(l_ry1, (OPJ_INT32)l_pdy) << l_pdy;
      l_pw = (l_rx0==l_rx1)?0:(OPJ_UINT32)((l_px1 - l_px0) >> l_pdx);
      l_ph = (l_ry0==l_ry1)?0:(OPJ_UINT32)((py1 - l_py0) >> l_pdy);
      *lResolutionPtr++ = l_pw;
      *lResolutionPtr++ = l_ph;
      l_product = l_pw * l_ph;
      
            /* update precision*/
      if (l_product > *p_max_prec) {
        *p_max_prec = l_product;
      }

      --l_level_no;
    }
    ++l_tccp;
    ++l_img_comp;
  }
}

opj_pi_iterator_t * opj_pi_create(  const opj_image_t *image,
                                    const opj_cp_t *cp,
                                    OPJ_UINT32 tileno )
{
  /* loop*/
  OPJ_UINT32 pino, compno;
  /* number of poc in the p_pi*/
  OPJ_UINT32 l_poc_bound;

  /* pointers to tile coding parameters and components.*/
  opj_pi_iterator_t *l_pi = 00;
  opj_tcp_t *tcp = 00;
  const opj_tccp_t *tccp = 00;

  /* current packet iterator being allocated*/
  opj_pi_iterator_t *l_current_pi = 00;

  /* preconditions in debug*/
  assert(cp != 00);
  assert(image != 00);
  assert(tileno < cp->tw * cp->th);

  /* initializations*/
  tcp = &cp->tcps[tileno];
  l_poc_bound = tcp->numpocs+1;

  /* memory allocations*/
  l_pi = (opj_pi_iterator_t*) opj_calloc((l_poc_bound), sizeof(opj_pi_iterator_t));
  if (!l_pi) {
    return NULL;
  }
  memset(l_pi,0,l_poc_bound * sizeof(opj_pi_iterator_t));

  l_current_pi = l_pi;
  for (pino = 0; pino < l_poc_bound ; ++pino) {

    l_current_pi->comps = (opj_pi_comp_t*) opj_calloc(image->numcomps, sizeof(opj_pi_comp_t));
    if (! l_current_pi->comps) {
      opj_pi_destroy(l_pi, l_poc_bound);
      return NULL;
    }

    l_current_pi->numcomps = image->numcomps;
    memset(l_current_pi->comps,0,image->numcomps * sizeof(opj_pi_comp_t));

    for (compno = 0; compno < image->numcomps; ++compno) {
      opj_pi_comp_t *comp = &l_current_pi->comps[compno];

      tccp = &tcp->tccps[compno];

      comp->resolutions = (opj_pi_resolution_t*) opj_malloc(tccp->numresolutions * sizeof(opj_pi_resolution_t));
      if (!comp->resolutions) {
        opj_pi_destroy(l_pi, l_poc_bound);
        return 00;
      }

      comp->numresolutions = tccp->numresolutions;
      memset(comp->resolutions,0,tccp->numresolutions * sizeof(opj_pi_resolution_t));
    }
    ++l_current_pi;
  }
  return l_pi;
}

void opj_pi_update_encode_poc_and_final (   opj_cp_t *p_cp,
                                            OPJ_UINT32 p_tileno,
                                            OPJ_INT32 p_tx0,
                                            OPJ_INT32 p_tx1,
                                            OPJ_INT32 p_ty0,
                                            OPJ_INT32 p_ty1,
                                            OPJ_UINT32 p_max_prec,
                                            OPJ_UINT32 p_max_res,
                                            OPJ_UINT32 p_dx_min,
                                            OPJ_UINT32 p_dy_min)
{
  /* loop*/
  OPJ_UINT32 pino;
  /* tile coding parameter*/
  opj_tcp_t *l_tcp = 00;
  /* current poc being updated*/
  opj_poc_t * l_current_poc = 00;

  /* number of pocs*/
  OPJ_UINT32 l_poc_bound;

    OPJ_ARG_NOT_USED(p_max_res);

  /* preconditions in debug*/
  assert(p_cp != 00);
  assert(p_tileno < p_cp->tw * p_cp->th);

  /* initializations*/
  l_tcp = &p_cp->tcps [p_tileno];
  /* number of iterations in the loop */
  l_poc_bound = l_tcp->numpocs+1;

  /* start at first element, and to make sure the compiler will not make a calculation each time in the loop
     store a pointer to the current element to modify rather than l_tcp->pocs[i]*/
  l_current_poc = l_tcp->pocs;

  l_current_poc->compS = l_current_poc->compno0;
  l_current_poc->compE = l_current_poc->compno1;
  l_current_poc->resS = l_current_poc->resno0;
  l_current_poc->resE = l_current_poc->resno1;
  l_current_poc->layE = l_current_poc->layno1;

  /* special treatment for the first element*/
  l_current_poc->layS = 0;
  l_current_poc->prg  = l_current_poc->prg1;
  l_current_poc->prcS = 0;

  l_current_poc->prcE = p_max_prec;
  l_current_poc->txS = (OPJ_UINT32)p_tx0;
  l_current_poc->txE = (OPJ_UINT32)p_tx1;
  l_current_poc->tyS = (OPJ_UINT32)p_ty0;
  l_current_poc->tyE = (OPJ_UINT32)p_ty1;
  l_current_poc->dx = p_dx_min;
  l_current_poc->dy = p_dy_min;

  ++ l_current_poc;
  for (pino = 1;pino < l_poc_bound ; ++pino) {
    l_current_poc->compS = l_current_poc->compno0;
    l_current_poc->compE= l_current_poc->compno1;
    l_current_poc->resS = l_current_poc->resno0;
    l_current_poc->resE = l_current_poc->resno1;
    l_current_poc->layE = l_current_poc->layno1;
    l_current_poc->prg  = l_current_poc->prg1;
    l_current_poc->prcS = 0;
    /* special treatment here different from the first element*/
    l_current_poc->layS = (l_current_poc->layE > (l_current_poc-1)->layE) ? l_current_poc->layE : 0;

    l_current_poc->prcE = p_max_prec;
    l_current_poc->txS = (OPJ_UINT32)p_tx0;
    l_current_poc->txE = (OPJ_UINT32)p_tx1;
    l_current_poc->tyS = (OPJ_UINT32)p_ty0;
    l_current_poc->tyE = (OPJ_UINT32)p_ty1;
    l_current_poc->dx = p_dx_min;
    l_current_poc->dy = p_dy_min;
    ++ l_current_poc;
  }
}

void opj_pi_update_encode_not_poc ( opj_cp_t *p_cp,
                                    OPJ_UINT32 p_num_comps,
                                    OPJ_UINT32 p_tileno,
                                    OPJ_INT32 p_tx0,
                                    OPJ_INT32 p_tx1,
                                    OPJ_INT32 p_ty0,
                                    OPJ_INT32 p_ty1,
                                    OPJ_UINT32 p_max_prec,
                                    OPJ_UINT32 p_max_res,
                                    OPJ_UINT32 p_dx_min,
                                    OPJ_UINT32 p_dy_min)
{
  /* loop*/
  OPJ_UINT32 pino;
  /* tile coding parameter*/
  opj_tcp_t *l_tcp = 00;
  /* current poc being updated*/
  opj_poc_t * l_current_poc = 00;
  /* number of pocs*/
  OPJ_UINT32 l_poc_bound;

  /* preconditions in debug*/
  assert(p_cp != 00);
  assert(p_tileno < p_cp->tw * p_cp->th);

  /* initializations*/
  l_tcp = &p_cp->tcps [p_tileno];

  /* number of iterations in the loop */
  l_poc_bound = l_tcp->numpocs+1;

  /* start at first element, and to make sure the compiler will not make a calculation each time in the loop
     store a pointer to the current element to modify rather than l_tcp->pocs[i]*/
  l_current_poc = l_tcp->pocs;

  for (pino = 0; pino < l_poc_bound ; ++pino) {
    l_current_poc->compS = 0;
    l_current_poc->compE = p_num_comps;/*p_image->numcomps;*/
    l_current_poc->resS = 0;
    l_current_poc->resE = p_max_res;
    l_current_poc->layS = 0;
    l_current_poc->layE = l_tcp->numlayers;
    l_current_poc->prg  = l_tcp->prg;
    l_current_poc->prcS = 0;
    l_current_poc->prcE = p_max_prec;
    l_current_poc->txS = (OPJ_UINT32)p_tx0;
    l_current_poc->txE = (OPJ_UINT32)p_tx1;
    l_current_poc->tyS = (OPJ_UINT32)p_ty0;
    l_current_poc->tyE = (OPJ_UINT32)p_ty1;
    l_current_poc->dx = p_dx_min;
    l_current_poc->dy = p_dy_min;
    ++ l_current_poc;
  }
}

void opj_pi_update_decode_poc (opj_pi_iterator_t * p_pi,
                               opj_tcp_t * p_tcp,
                               OPJ_UINT32 p_max_precision,
                               OPJ_UINT32 p_max_res)
{
  /* loop*/
  OPJ_UINT32 pino;

  /* encoding prameters to set*/
  OPJ_UINT32 l_bound;

  opj_pi_iterator_t * l_current_pi = 00;
  opj_poc_t* l_current_poc = 0;

    OPJ_ARG_NOT_USED(p_max_res);

  /* preconditions in debug*/
  assert(p_pi != 00);
  assert(p_tcp != 00);

  /* initializations*/
  l_bound = p_tcp->numpocs+1;
  l_current_pi = p_pi;
  l_current_poc = p_tcp->pocs;

  for (pino = 0;pino<l_bound;++pino) {
    l_current_pi->poc.prg = l_current_poc->prg; /* Progression Order #0 */
    l_current_pi->first = 1;

    l_current_pi->poc.resno0 = l_current_poc->resno0; /* Resolution Level Index #0 (Start) */
    l_current_pi->poc.compno0 = l_current_poc->compno0; /* Component Index #0 (Start) */
    l_current_pi->poc.layno0 = 0;
    l_current_pi->poc.precno0 = 0;
    l_current_pi->poc.resno1 = l_current_poc->resno1; /* Resolution Level Index #0 (End) */
    l_current_pi->poc.compno1 = l_current_poc->compno1; /* Component Index #0 (End) */
    l_current_pi->poc.layno1 = l_current_poc->layno1; /* Layer Index #0 (End) */
    l_current_pi->poc.precno1 = p_max_precision;
    ++l_current_pi;
    ++l_current_poc;
  }
}

void opj_pi_update_decode_not_poc (opj_pi_iterator_t * p_pi,
                                   opj_tcp_t * p_tcp,
                                   OPJ_UINT32 p_max_precision,
                                   OPJ_UINT32 p_max_res)
{
  /* loop*/
  OPJ_UINT32 pino;

  /* encoding prameters to set*/
  OPJ_UINT32 l_bound;

  opj_pi_iterator_t * l_current_pi = 00;
  /* preconditions in debug*/
  assert(p_tcp != 00);
  assert(p_pi != 00);

  /* initializations*/
  l_bound = p_tcp->numpocs+1;
  l_current_pi = p_pi;

  for (pino = 0;pino<l_bound;++pino) {
    l_current_pi->poc.prg = p_tcp->prg;
    l_current_pi->first = 1;
    l_current_pi->poc.resno0 = 0;
    l_current_pi->poc.compno0 = 0;
    l_current_pi->poc.layno0 = 0;
    l_current_pi->poc.precno0 = 0;
    l_current_pi->poc.resno1 = p_max_res;
    l_current_pi->poc.compno1 = l_current_pi->numcomps;
    l_current_pi->poc.layno1 = p_tcp->numlayers;
    l_current_pi->poc.precno1 = p_max_precision;
    ++l_current_pi;
  }
}



OPJ_BOOL opj_pi_check_next_level( OPJ_INT32 pos,
                opj_cp_t *cp,
                OPJ_UINT32 tileno,
                OPJ_UINT32 pino,
                const OPJ_CHAR *prog)
{
  OPJ_INT32 i;
  opj_tcp_t *tcps =&cp->tcps[tileno];
  opj_poc_t *tcp = &tcps->pocs[pino];

  if(pos>=0){
    for(i=pos;pos>=0;i--){
      switch(prog[i]){
        case 'R':
          if(tcp->res_t==tcp->resE){
            if(opj_pi_check_next_level(pos-1,cp,tileno,pino,prog)){
              return OPJ_TRUE;
            }else{
              return OPJ_FALSE;
            }
          }else{
            return OPJ_TRUE;
          }
          break;
        case 'C':
          if(tcp->comp_t==tcp->compE){
            if(opj_pi_check_next_level(pos-1,cp,tileno,pino,prog)){
              return OPJ_TRUE;
            }else{
              return OPJ_FALSE;
            }
          }else{
            return OPJ_TRUE;
          }
          break;
        case 'L':
          if(tcp->lay_t==tcp->layE){
            if(opj_pi_check_next_level(pos-1,cp,tileno,pino,prog)){
              return OPJ_TRUE;
            }else{
              return OPJ_FALSE;
            }
          }else{
            return OPJ_TRUE;
          }
          break;
        case 'P':
          switch(tcp->prg){
            case OPJ_LRCP||OPJ_RLCP:
              if(tcp->prc_t == tcp->prcE){
                if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                  return OPJ_TRUE;
                }else{
                  return OPJ_FALSE;
                }
              }else{
                return OPJ_TRUE;
              }
              break;
          default:
            if(tcp->tx0_t == tcp->txE){
              /*TY*/
              if(tcp->ty0_t == tcp->tyE){
                if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                  return OPJ_TRUE;
                }else{
                  return OPJ_FALSE;
                }
              }else{
                return OPJ_TRUE;
              }/*TY*/
            }else{
              return OPJ_TRUE;
            }
            break;
          }/*end case P*/
        }/*end switch*/
    }/*end for*/
  }/*end if*/
  return OPJ_FALSE;
}


/*
==========================================================
   Packet iterator interface
==========================================================
*/
opj_pi_iterator_t *opj_pi_create_decode(opj_image_t *p_image,
                    opj_cp_t *p_cp,
                    OPJ_UINT32 p_tile_no)
{
  /* loop */
  OPJ_UINT32 pino;
  OPJ_UINT32 compno, resno;

  /* to store w, h, dx and dy fro all components and resolutions */
  OPJ_UINT32 * l_tmp_data;
  OPJ_UINT32 ** l_tmp_ptr;

  /* encoding prameters to set */
  OPJ_UINT32 l_max_res;
  OPJ_UINT32 l_max_prec;
  OPJ_INT32 l_tx0,l_tx1,l_ty0,l_ty1;
  OPJ_UINT32 l_dx_min,l_dy_min;
  OPJ_UINT32 l_bound;
  OPJ_UINT32 l_step_p , l_step_c , l_step_r , l_step_l ;
  OPJ_UINT32 l_data_stride;

  /* pointers */
  opj_pi_iterator_t *l_pi = 00;
  opj_tcp_t *l_tcp = 00;
  const opj_tccp_t *l_tccp = 00;
  opj_pi_comp_t *l_current_comp = 00;
  opj_image_comp_t * l_img_comp = 00;
  opj_pi_iterator_t * l_current_pi = 00;
  OPJ_UINT32 * l_encoding_value_ptr = 00;

  /* preconditions in debug */
  assert(p_cp != 00);
  assert(p_image != 00);
  assert(p_tile_no < p_cp->tw * p_cp->th);

  /* initializations */
  l_tcp = &p_cp->tcps[p_tile_no];
  l_bound = l_tcp->numpocs+1;

  l_data_stride = 4 * OPJ_J2K_MAXRLVLS;
  l_tmp_data = (OPJ_UINT32*)opj_malloc(
    l_data_stride * p_image->numcomps * sizeof(OPJ_UINT32));
  if
    (! l_tmp_data)
  {
    return 00;
  }
  l_tmp_ptr = (OPJ_UINT32**)opj_malloc(
    p_image->numcomps * sizeof(OPJ_UINT32 *));
  if
    (! l_tmp_ptr)
  {
    opj_free(l_tmp_data);
    return 00;
  }

  /* memory allocation for pi */
  l_pi = opj_pi_create(p_image, p_cp, p_tile_no);
  if (!l_pi) {
    opj_free(l_tmp_data);
    opj_free(l_tmp_ptr);
    return 00;
  }

  l_encoding_value_ptr = l_tmp_data;
  /* update pointer array */
  for
    (compno = 0; compno < p_image->numcomps; ++compno)
  {
    l_tmp_ptr[compno] = l_encoding_value_ptr;
    l_encoding_value_ptr += l_data_stride;
  }
  /* get encoding parameters */
  opj_get_all_encoding_parameters(p_image,p_cp,p_tile_no,&l_tx0,&l_tx1,&l_ty0,&l_ty1,&l_dx_min,&l_dy_min,&l_max_prec,&l_max_res,l_tmp_ptr);

  /* step calculations */
  l_step_p = 1;
  l_step_c = l_max_prec * l_step_p;
  l_step_r = p_image->numcomps * l_step_c;
  l_step_l = l_max_res * l_step_r;

  /* set values for first packet iterator */
  l_current_pi = l_pi;

  /* memory allocation for include */
  l_current_pi->include = (OPJ_INT16*) opj_calloc((l_tcp->numlayers +1) * l_step_l, sizeof(OPJ_INT16));
  if
    (!l_current_pi->include)
  {
    opj_free(l_tmp_data);
    opj_free(l_tmp_ptr);
    opj_pi_destroy(l_pi, l_bound);
    return 00;
  }
  memset(l_current_pi->include,0, (l_tcp->numlayers + 1) * l_step_l* sizeof(OPJ_INT16));

  /* special treatment for the first packet iterator */
  l_current_comp = l_current_pi->comps;
  l_img_comp = p_image->comps;
  l_tccp = l_tcp->tccps;

  l_current_pi->tx0 = l_tx0;
  l_current_pi->ty0 = l_ty0;
  l_current_pi->tx1 = l_tx1;
  l_current_pi->ty1 = l_ty1;

  /*l_current_pi->dx = l_img_comp->dx;*/
  /*l_current_pi->dy = l_img_comp->dy;*/

  l_current_pi->step_p = l_step_p;
  l_current_pi->step_c = l_step_c;
  l_current_pi->step_r = l_step_r;
  l_current_pi->step_l = l_step_l;

  /* allocation for components and number of components has already been calculated by opj_pi_create */
  for
    (compno = 0; compno < l_current_pi->numcomps; ++compno)
  {
    opj_pi_resolution_t *l_res = l_current_comp->resolutions;
    l_encoding_value_ptr = l_tmp_ptr[compno];

    l_current_comp->dx = l_img_comp->dx;
    l_current_comp->dy = l_img_comp->dy;
    /* resolutions have already been initialized */
    for
      (resno = 0; resno < l_current_comp->numresolutions; resno++)
    {
      l_res->pdx = *(l_encoding_value_ptr++);
      l_res->pdy = *(l_encoding_value_ptr++);
      l_res->pw =  *(l_encoding_value_ptr++);
      l_res->ph =  *(l_encoding_value_ptr++);
      ++l_res;
    }
    ++l_current_comp;
    ++l_img_comp;
    ++l_tccp;
  }
  ++l_current_pi;

  for (pino = 1 ; pino<l_bound ; ++pino )
  {
    l_current_comp = l_current_pi->comps;
    l_img_comp = p_image->comps;
    l_tccp = l_tcp->tccps;

    l_current_pi->tx0 = l_tx0;
    l_current_pi->ty0 = l_ty0;
    l_current_pi->tx1 = l_tx1;
    l_current_pi->ty1 = l_ty1;
    /*l_current_pi->dx = l_dx_min;*/
    /*l_current_pi->dy = l_dy_min;*/
    l_current_pi->step_p = l_step_p;
    l_current_pi->step_c = l_step_c;
    l_current_pi->step_r = l_step_r;
    l_current_pi->step_l = l_step_l;

    /* allocation for components and number of components has already been calculated by opj_pi_create */
    for
      (compno = 0; compno < l_current_pi->numcomps; ++compno)
    {
      opj_pi_resolution_t *l_res = l_current_comp->resolutions;
      l_encoding_value_ptr = l_tmp_ptr[compno];

      l_current_comp->dx = l_img_comp->dx;
      l_current_comp->dy = l_img_comp->dy;
      /* resolutions have already been initialized */
      for
        (resno = 0; resno < l_current_comp->numresolutions; resno++)
      {
        l_res->pdx = *(l_encoding_value_ptr++);
        l_res->pdy = *(l_encoding_value_ptr++);
        l_res->pw =  *(l_encoding_value_ptr++);
        l_res->ph =  *(l_encoding_value_ptr++);
        ++l_res;
      }
      ++l_current_comp;
      ++l_img_comp;
      ++l_tccp;
    }
    /* special treatment*/
    l_current_pi->include = (l_current_pi-1)->include;
    ++l_current_pi;
  }
  opj_free(l_tmp_data);
  l_tmp_data = 00;
  opj_free(l_tmp_ptr);
  l_tmp_ptr = 00;
  if
    (l_tcp->POC)
  {
    opj_pi_update_decode_poc (l_pi,l_tcp,l_max_prec,l_max_res);
  }
  else
  {
    opj_pi_update_decode_not_poc(l_pi,l_tcp,l_max_prec,l_max_res);
  }
  return l_pi;
}



opj_pi_iterator_t *opj_pi_initialise_encode(const opj_image_t *p_image,
                                            opj_cp_t *p_cp,
                                            OPJ_UINT32 p_tile_no,
                                            J2K_T2_MODE p_t2_mode )
{
  /* loop*/
  OPJ_UINT32 pino;
  OPJ_UINT32 compno, resno;

  /* to store w, h, dx and dy fro all components and resolutions*/
  OPJ_UINT32 * l_tmp_data;
  OPJ_UINT32 ** l_tmp_ptr;

  /* encoding prameters to set*/
  OPJ_UINT32 l_max_res;
  OPJ_UINT32 l_max_prec;
  OPJ_INT32 l_tx0,l_tx1,l_ty0,l_ty1;
  OPJ_UINT32 l_dx_min,l_dy_min;
  OPJ_UINT32 l_bound;
  OPJ_UINT32 l_step_p , l_step_c , l_step_r , l_step_l ;
  OPJ_UINT32 l_data_stride;

  /* pointers*/
  opj_pi_iterator_t *l_pi = 00;
  opj_tcp_t *l_tcp = 00;
  const opj_tccp_t *l_tccp = 00;
  opj_pi_comp_t *l_current_comp = 00;
  opj_image_comp_t * l_img_comp = 00;
  opj_pi_iterator_t * l_current_pi = 00;
  OPJ_UINT32 * l_encoding_value_ptr = 00;

  /* preconditions in debug*/
  assert(p_cp != 00);
  assert(p_image != 00);
  assert(p_tile_no < p_cp->tw * p_cp->th);

  /* initializations*/
  l_tcp = &p_cp->tcps[p_tile_no];
  l_bound = l_tcp->numpocs+1;

  l_data_stride = 4 * OPJ_J2K_MAXRLVLS;
  l_tmp_data = (OPJ_UINT32*)opj_malloc(
    l_data_stride * p_image->numcomps * sizeof(OPJ_UINT32));
  if (! l_tmp_data) {
    return 00;
  }

  l_tmp_ptr = (OPJ_UINT32**)opj_malloc(
    p_image->numcomps * sizeof(OPJ_UINT32 *));
  if (! l_tmp_ptr) {
    opj_free(l_tmp_data);
    return 00;
  }

  /* memory allocation for pi*/
  l_pi = opj_pi_create(p_image,p_cp,p_tile_no);
  if (!l_pi) {
    opj_free(l_tmp_data);
    opj_free(l_tmp_ptr);
    return 00;
  }

  l_encoding_value_ptr = l_tmp_data;
  /* update pointer array*/
  for (compno = 0; compno < p_image->numcomps; ++compno) {
    l_tmp_ptr[compno] = l_encoding_value_ptr;
    l_encoding_value_ptr += l_data_stride;
  }

  /* get encoding parameters*/
  opj_get_all_encoding_parameters(p_image,p_cp,p_tile_no,&l_tx0,&l_tx1,&l_ty0,&l_ty1,&l_dx_min,&l_dy_min,&l_max_prec,&l_max_res,l_tmp_ptr);

  /* step calculations*/
  l_step_p = 1;
  l_step_c = l_max_prec * l_step_p;
  l_step_r = p_image->numcomps * l_step_c;
  l_step_l = l_max_res * l_step_r;

  /* set values for first packet iterator*/
  l_pi->tp_on = p_cp->m_specific_param.m_enc.m_tp_on;
  l_current_pi = l_pi;

  /* memory allocation for include*/
  l_current_pi->include = (OPJ_INT16*) opj_calloc(l_tcp->numlayers * l_step_l, sizeof(OPJ_INT16));
  if (!l_current_pi->include) {
    opj_free(l_tmp_data);
    opj_free(l_tmp_ptr);
    opj_pi_destroy(l_pi, l_bound);
    return 00;
  }
  memset(l_current_pi->include,0,l_tcp->numlayers * l_step_l* sizeof(OPJ_INT16));

  /* special treatment for the first packet iterator*/
  l_current_comp = l_current_pi->comps;
  l_img_comp = p_image->comps;
  l_tccp = l_tcp->tccps;
  l_current_pi->tx0 = l_tx0;
  l_current_pi->ty0 = l_ty0;
  l_current_pi->tx1 = l_tx1;
  l_current_pi->ty1 = l_ty1;
  l_current_pi->dx = l_dx_min;
  l_current_pi->dy = l_dy_min;
  l_current_pi->step_p = l_step_p;
  l_current_pi->step_c = l_step_c;
  l_current_pi->step_r = l_step_r;
  l_current_pi->step_l = l_step_l;

  /* allocation for components and number of components has already been calculated by opj_pi_create */
  for (compno = 0; compno < l_current_pi->numcomps; ++compno) {
    opj_pi_resolution_t *l_res = l_current_comp->resolutions;
    l_encoding_value_ptr = l_tmp_ptr[compno];

    l_current_comp->dx = l_img_comp->dx;
    l_current_comp->dy = l_img_comp->dy;

    /* resolutions have already been initialized */
    for (resno = 0; resno < l_current_comp->numresolutions; resno++) {
      l_res->pdx = *(l_encoding_value_ptr++);
      l_res->pdy = *(l_encoding_value_ptr++);
      l_res->pw =  *(l_encoding_value_ptr++);
      l_res->ph =  *(l_encoding_value_ptr++);
      ++l_res;
    }

    ++l_current_comp;
    ++l_img_comp;
    ++l_tccp;
  }
  ++l_current_pi;

  for (pino = 1 ; pino<l_bound ; ++pino ) {
    l_current_comp = l_current_pi->comps;
    l_img_comp = p_image->comps;
    l_tccp = l_tcp->tccps;

    l_current_pi->tx0 = l_tx0;
    l_current_pi->ty0 = l_ty0;
    l_current_pi->tx1 = l_tx1;
    l_current_pi->ty1 = l_ty1;
    l_current_pi->dx = l_dx_min;
    l_current_pi->dy = l_dy_min;
    l_current_pi->step_p = l_step_p;
    l_current_pi->step_c = l_step_c;
    l_current_pi->step_r = l_step_r;
    l_current_pi->step_l = l_step_l;

    /* allocation for components and number of components has already been calculated by opj_pi_create */
    for (compno = 0; compno < l_current_pi->numcomps; ++compno) {
      opj_pi_resolution_t *l_res = l_current_comp->resolutions;
      l_encoding_value_ptr = l_tmp_ptr[compno];

      l_current_comp->dx = l_img_comp->dx;
      l_current_comp->dy = l_img_comp->dy;
      /* resolutions have already been initialized */
      for (resno = 0; resno < l_current_comp->numresolutions; resno++) {
        l_res->pdx = *(l_encoding_value_ptr++);
        l_res->pdy = *(l_encoding_value_ptr++);
        l_res->pw =  *(l_encoding_value_ptr++);
        l_res->ph =  *(l_encoding_value_ptr++);
        ++l_res;
      }
      ++l_current_comp;
      ++l_img_comp;
      ++l_tccp;
    }

    /* special treatment*/
    l_current_pi->include = (l_current_pi-1)->include;
    ++l_current_pi;
  }

  opj_free(l_tmp_data);
  l_tmp_data = 00;
  opj_free(l_tmp_ptr);
  l_tmp_ptr = 00;

  if (l_tcp->POC && ( p_cp->m_specific_param.m_enc.m_cinema || p_t2_mode == FINAL_PASS)) {
    opj_pi_update_encode_poc_and_final(p_cp,p_tile_no,l_tx0,l_tx1,l_ty0,l_ty1,l_max_prec,l_max_res,l_dx_min,l_dy_min);
  }
  else {
    opj_pi_update_encode_not_poc(p_cp,p_image->numcomps,p_tile_no,l_tx0,l_tx1,l_ty0,l_ty1,l_max_prec,l_max_res,l_dx_min,l_dy_min);
  }

  return l_pi;
}

void opj_pi_create_encode(  opj_pi_iterator_t *pi,
              opj_cp_t *cp,
              OPJ_UINT32 tileno,
              OPJ_UINT32 pino,
              OPJ_UINT32 tpnum,
              OPJ_INT32 tppos,
              J2K_T2_MODE t2_mode)
{
  const OPJ_CHAR *prog;
  OPJ_INT32 i;
  OPJ_UINT32 incr_top=1,resetX=0;
  opj_tcp_t *tcps =&cp->tcps[tileno];
  opj_poc_t *tcp= &tcps->pocs[pino];

  prog = opj_j2k_convert_progression_order(tcp->prg);

  pi[pino].first = 1;
  pi[pino].poc.prg = tcp->prg;

  if(!(cp->m_specific_param.m_enc.m_tp_on && ((!cp->m_specific_param.m_enc.m_cinema && (t2_mode == FINAL_PASS)) || cp->m_specific_param.m_enc.m_cinema))){
    pi[pino].poc.resno0 = tcp->resS;
    pi[pino].poc.resno1 = tcp->resE;
    pi[pino].poc.compno0 = tcp->compS;
    pi[pino].poc.compno1 = tcp->compE;
    pi[pino].poc.layno0 = tcp->layS;
    pi[pino].poc.layno1 = tcp->layE;
    pi[pino].poc.precno0 = tcp->prcS;
    pi[pino].poc.precno1 = tcp->prcE;
    pi[pino].poc.tx0 = (OPJ_INT32)tcp->txS;
    pi[pino].poc.ty0 = (OPJ_INT32)tcp->tyS;
    pi[pino].poc.tx1 = (OPJ_INT32)tcp->txE;
    pi[pino].poc.ty1 = (OPJ_INT32)tcp->tyE;
  }else {
    for(i=tppos+1;i<4;i++){
      switch(prog[i]){
      case 'R':
        pi[pino].poc.resno0 = tcp->resS;
        pi[pino].poc.resno1 = tcp->resE;
        break;
      case 'C':
        pi[pino].poc.compno0 = tcp->compS;
        pi[pino].poc.compno1 = tcp->compE;
        break;
      case 'L':
        pi[pino].poc.layno0 = tcp->layS;
        pi[pino].poc.layno1 = tcp->layE;
        break;
      case 'P':
        switch(tcp->prg){
        case OPJ_LRCP:
        case OPJ_RLCP:
          pi[pino].poc.precno0 = tcp->prcS;
          pi[pino].poc.precno1 = tcp->prcE;
          break;
        default:
          pi[pino].poc.tx0 = (OPJ_INT32)tcp->txS;
          pi[pino].poc.ty0 = (OPJ_INT32)tcp->tyS;
          pi[pino].poc.tx1 = (OPJ_INT32)tcp->txE;
          pi[pino].poc.ty1 = (OPJ_INT32)tcp->tyE;
          break;
        }
        break;
      }
    }

    if(tpnum==0){
      for(i=tppos;i>=0;i--){
        switch(prog[i]){
        case 'C':
          tcp->comp_t = tcp->compS;
          pi[pino].poc.compno0 = tcp->comp_t;
          pi[pino].poc.compno1 = tcp->comp_t+1;
          tcp->comp_t+=1;
          break;
        case 'R':
          tcp->res_t = tcp->resS;
          pi[pino].poc.resno0 = tcp->res_t;
          pi[pino].poc.resno1 = tcp->res_t+1;
          tcp->res_t+=1;
          break;
        case 'L':
          tcp->lay_t = tcp->layS;
          pi[pino].poc.layno0 = tcp->lay_t;
          pi[pino].poc.layno1 = tcp->lay_t+1;
          tcp->lay_t+=1;
          break;
        case 'P':
          switch(tcp->prg){
          case OPJ_LRCP:
          case OPJ_RLCP:
            tcp->prc_t = tcp->prcS;
            pi[pino].poc.precno0 = tcp->prc_t;
            pi[pino].poc.precno1 = tcp->prc_t+1;
            tcp->prc_t+=1;
            break;
          default:
            tcp->tx0_t = tcp->txS;
            tcp->ty0_t = tcp->tyS;
            pi[pino].poc.tx0 = (OPJ_INT32)tcp->tx0_t;
            pi[pino].poc.tx1 = (OPJ_INT32)(tcp->tx0_t + tcp->dx - (tcp->tx0_t % tcp->dx));
            pi[pino].poc.ty0 = (OPJ_INT32)tcp->ty0_t;
            pi[pino].poc.ty1 = (OPJ_INT32)(tcp->ty0_t + tcp->dy - (tcp->ty0_t % tcp->dy));
            tcp->tx0_t = (OPJ_UINT32)pi[pino].poc.tx1;
            tcp->ty0_t = (OPJ_UINT32)pi[pino].poc.ty1;
            break;
          }
          break;
        }
      }
      incr_top=1;
    }else{
      for(i=tppos;i>=0;i--){
        switch(prog[i]){
        case 'C':
          pi[pino].poc.compno0 = tcp->comp_t-1;
          pi[pino].poc.compno1 = tcp->comp_t;
          break;
        case 'R':
          pi[pino].poc.resno0 = tcp->res_t-1;
          pi[pino].poc.resno1 = tcp->res_t;
          break;
        case 'L':
          pi[pino].poc.layno0 = tcp->lay_t-1;
          pi[pino].poc.layno1 = tcp->lay_t;
          break;
        case 'P':
          switch(tcp->prg){
          case OPJ_LRCP:
          case OPJ_RLCP:
            pi[pino].poc.precno0 = tcp->prc_t-1;
            pi[pino].poc.precno1 = tcp->prc_t;
            break;
          default:
            pi[pino].poc.tx0 = (OPJ_INT32)(tcp->tx0_t - tcp->dx - (tcp->tx0_t % tcp->dx));
            pi[pino].poc.tx1 = (OPJ_INT32)tcp->tx0_t ;
            pi[pino].poc.ty0 = (OPJ_INT32)(tcp->ty0_t - tcp->dy - (tcp->ty0_t % tcp->dy));
            pi[pino].poc.ty1 = (OPJ_INT32)tcp->ty0_t ;
            break;
          }
          break;
        }
        if(incr_top==1){
          switch(prog[i]){
          case 'R':
            if(tcp->res_t==tcp->resE){
              if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                tcp->res_t = tcp->resS;
                pi[pino].poc.resno0 = tcp->res_t;
                pi[pino].poc.resno1 = tcp->res_t+1;
                tcp->res_t+=1;
                incr_top=1;
              }else{
                incr_top=0;
              }
            }else{
              pi[pino].poc.resno0 = tcp->res_t;
              pi[pino].poc.resno1 = tcp->res_t+1;
              tcp->res_t+=1;
              incr_top=0;
            }
            break;
          case 'C':
            if(tcp->comp_t ==tcp->compE){
              if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                tcp->comp_t = tcp->compS;
                pi[pino].poc.compno0 = tcp->comp_t;
                pi[pino].poc.compno1 = tcp->comp_t+1;
                tcp->comp_t+=1;
                incr_top=1;
              }else{
                incr_top=0;
              }
            }else{
              pi[pino].poc.compno0 = tcp->comp_t;
              pi[pino].poc.compno1 = tcp->comp_t+1;
              tcp->comp_t+=1;
              incr_top=0;
            }
            break;
          case 'L':
            if(tcp->lay_t == tcp->layE){
              if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                tcp->lay_t = tcp->layS;
                pi[pino].poc.layno0 = tcp->lay_t;
                pi[pino].poc.layno1 = tcp->lay_t+1;
                tcp->lay_t+=1;
                incr_top=1;
              }else{
                incr_top=0;
              }
            }else{
              pi[pino].poc.layno0 = tcp->lay_t;
              pi[pino].poc.layno1 = tcp->lay_t+1;
              tcp->lay_t+=1;
              incr_top=0;
            }
            break;
          case 'P':
            switch(tcp->prg){
            case OPJ_LRCP:
            case OPJ_RLCP:
              if(tcp->prc_t == tcp->prcE){
                if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                  tcp->prc_t = tcp->prcS;
                  pi[pino].poc.precno0 = tcp->prc_t;
                  pi[pino].poc.precno1 = tcp->prc_t+1;
                  tcp->prc_t+=1;
                  incr_top=1;
                }else{
                  incr_top=0;
                }
              }else{
                pi[pino].poc.precno0 = tcp->prc_t;
                pi[pino].poc.precno1 = tcp->prc_t+1;
                tcp->prc_t+=1;
                incr_top=0;
              }
              break;
            default:
              if(tcp->tx0_t >= tcp->txE){
                if(tcp->ty0_t >= tcp->tyE){
                  if(opj_pi_check_next_level(i-1,cp,tileno,pino,prog)){
                    tcp->ty0_t = tcp->tyS;
                    pi[pino].poc.ty0 = (OPJ_INT32)tcp->ty0_t;
                    pi[pino].poc.ty1 = (OPJ_INT32)(tcp->ty0_t + tcp->dy - (tcp->ty0_t % tcp->dy));
                    tcp->ty0_t = (OPJ_UINT32)pi[pino].poc.ty1;
                    incr_top=1;resetX=1;
                  }else{
                    incr_top=0;resetX=0;
                  }
                }else{
                  pi[pino].poc.ty0 = (OPJ_INT32)tcp->ty0_t;
                  pi[pino].poc.ty1 = (OPJ_INT32)(tcp->ty0_t + tcp->dy - (tcp->ty0_t % tcp->dy));
                  tcp->ty0_t = (OPJ_UINT32)pi[pino].poc.ty1;
                  incr_top=0;resetX=1;
                }
                if(resetX==1){
                  tcp->tx0_t = tcp->txS;
                  pi[pino].poc.tx0 = (OPJ_INT32)tcp->tx0_t;
                  pi[pino].poc.tx1 = (OPJ_INT32)(tcp->tx0_t + tcp->dx- (tcp->tx0_t % tcp->dx));
                  tcp->tx0_t = (OPJ_UINT32)pi[pino].poc.tx1;
                }
              }else{
                pi[pino].poc.tx0 = (OPJ_INT32)tcp->tx0_t;
                pi[pino].poc.tx1 = (OPJ_INT32)(tcp->tx0_t + tcp->dx- (tcp->tx0_t % tcp->dx));
                tcp->tx0_t = (OPJ_UINT32)pi[pino].poc.tx1;
                incr_top=0;
              }
              break;
            }
            break;
          }
        }
      }
    }
  }
}

void opj_pi_destroy(opj_pi_iterator_t *p_pi,
                    OPJ_UINT32 p_nb_elements)
{
  OPJ_UINT32 compno, pino;
  opj_pi_iterator_t *l_current_pi = p_pi;
    if (p_pi) {
    if (p_pi->include) {
      opj_free(p_pi->include);
      p_pi->include = 00;
    }
    for (pino = 0; pino < p_nb_elements; ++pino){
      if(l_current_pi->comps) {
        opj_pi_comp_t *l_current_component = l_current_pi->comps;
                for (compno = 0; compno < l_current_pi->numcomps; compno++){
                    if(l_current_component->resolutions) {
            opj_free(l_current_component->resolutions);
            l_current_component->resolutions = 00;
          }

          ++l_current_component;
        }
        opj_free(l_current_pi->comps);
        l_current_pi->comps = 0;
      }
      ++l_current_pi;
    }
    opj_free(p_pi);
  }
}



void opj_pi_update_encoding_parameters( const opj_image_t *p_image,
                                        opj_cp_t *p_cp,
                                        OPJ_UINT32 p_tile_no )
{
  /* encoding parameters to set */
  OPJ_UINT32 l_max_res;
  OPJ_UINT32 l_max_prec;
  OPJ_INT32 l_tx0,l_tx1,l_ty0,l_ty1;
  OPJ_UINT32 l_dx_min,l_dy_min;

  /* pointers */
  opj_tcp_t *l_tcp = 00;

  /* preconditions */
  assert(p_cp != 00);
  assert(p_image != 00);
  assert(p_tile_no < p_cp->tw * p_cp->th);

  l_tcp = &(p_cp->tcps[p_tile_no]);

  /* get encoding parameters */
  opj_get_encoding_parameters(p_image,p_cp,p_tile_no,&l_tx0,&l_tx1,&l_ty0,&l_ty1,&l_dx_min,&l_dy_min,&l_max_prec,&l_max_res);

  if (l_tcp->POC) {
    opj_pi_update_encode_poc_and_final(p_cp,p_tile_no,l_tx0,l_tx1,l_ty0,l_ty1,l_max_prec,l_max_res,l_dx_min,l_dy_min);
  }
  else {
    opj_pi_update_encode_not_poc(p_cp,p_image->numcomps,p_tile_no,l_tx0,l_tx1,l_ty0,l_ty1,l_max_prec,l_max_res,l_dx_min,l_dy_min);
  }
}

OPJ_BOOL opj_pi_next(opj_pi_iterator_t * pi) {
  switch (pi->poc.prg) {
    case OPJ_LRCP:
      return opj_pi_next_lrcp(pi);
    case OPJ_RLCP:
      return opj_pi_next_rlcp(pi);
    case OPJ_RPCL:
      return opj_pi_next_rpcl(pi);
    case OPJ_PCRL:
      return opj_pi_next_pcrl(pi);
    case OPJ_CPRL:
      return opj_pi_next_cprl(pi);
    case OPJ_PROG_UNKNOWN:
      return OPJ_FALSE;
  }
  
  return OPJ_FALSE;
}

Coverage Report

Created: 2025-10-28 06:24