/*

 * 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) 2007, Jonathan Ballard <dzonatas@dzonux.net>

 * Copyright (c) 2007, Callum Lerwick <seg@haxxed.com>

 * 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.

 */

#ifdef __SSE__

#include <xmmintrin.h>

#endif

#include "opj_includes.h"

/** @defgroup DWT DWT - Implementation of a discrete wavelet transform */

/*@{*/

#define OPJ_WS(i) v->mem[(i)*2]

#define OPJ_WD(i) v->mem[(1+(i)*2)]

/** @name Local data structures */

/*@{*/

typedef struct dwt_local {

  OPJ_INT32* mem;

  OPJ_INT32 dn;

  OPJ_INT32 sn;

  OPJ_INT32 cas;

} opj_dwt_t;

typedef union {

  OPJ_FLOAT32 f[4];

} opj_v4_t;

typedef struct v4dwt_local {

  opj_v4_t* wavelet ;

  OPJ_INT32   dn ;

  OPJ_INT32   sn ;

  OPJ_INT32   cas ;

} opj_v4dwt_t ;

static const OPJ_FLOAT32 opj_dwt_alpha =  1.586134342f; /*  12994 */

static const OPJ_FLOAT32 opj_dwt_beta  =  0.052980118f; /*    434 */

static const OPJ_FLOAT32 opj_dwt_gamma = -0.882911075f; /*  -7233 */

static const OPJ_FLOAT32 opj_dwt_delta = -0.443506852f; /*  -3633 */

static const OPJ_FLOAT32 opj_K      = 1.230174105f; /*  10078 */

static const OPJ_FLOAT32 opj_c13318 = 1.625732422f;

/*@}*/

/**

Virtual function type for wavelet transform in 1-D 

*/

typedef void (*DWT1DFN)(opj_dwt_t* v);

/** @name Local static functions */

/*@{*/

/**

Forward lazy transform (horizontal)

*/

static void opj_dwt_deinterleave_h(OPJ_INT32 *a, OPJ_INT32 *b, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas);

/**

Forward lazy transform (vertical)

*/

static void opj_dwt_deinterleave_v(OPJ_INT32 *a, OPJ_INT32 *b, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 x, OPJ_INT32 cas);

/**

Inverse lazy transform (horizontal)

*/

static void opj_dwt_interleave_h(opj_dwt_t* h, OPJ_INT32 *a);

/**

Inverse lazy transform (vertical)

*/

static void opj_dwt_interleave_v(opj_dwt_t* v, OPJ_INT32 *a, OPJ_INT32 x);

/**

Forward 5-3 wavelet transform in 1-D

*/

static void opj_dwt_encode_1(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas);

/**

Inverse 5-3 wavelet transform in 1-D

*/

static void opj_dwt_decode_1(opj_dwt_t *v);

static void opj_dwt_decode_1_(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas);

/**

Forward 9-7 wavelet transform in 1-D

*/

static void opj_dwt_encode_1_real(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas);

/**

Explicit calculation of the Quantization Stepsizes 

*/

static void opj_dwt_encode_stepsize(OPJ_INT32 stepsize, OPJ_INT32 numbps, opj_stepsize_t *bandno_stepsize);

/**

Inverse wavelet transform in 2-D.

*/

static OPJ_BOOL opj_dwt_decode_tile(opj_tcd_tilecomp_t* tilec, OPJ_UINT32 i, DWT1DFN fn);

static OPJ_BOOL opj_dwt_encode_procedure( opj_tcd_tilecomp_t * tilec,

                        void (*p_function)(OPJ_INT32 *, OPJ_INT32,OPJ_INT32,OPJ_INT32) );

static OPJ_UINT32 opj_dwt_max_resolution(opj_tcd_resolution_t* restrict r, OPJ_UINT32 i);

/* <summary>                             */

/* Inverse 9-7 wavelet transform in 1-D. */

/* </summary>                            */

static void opj_v4dwt_decode(opj_v4dwt_t* restrict dwt);

static void opj_v4dwt_interleave_h(opj_v4dwt_t* restrict w, OPJ_FLOAT32* restrict a, OPJ_INT32 x, OPJ_INT32 size);

static void opj_v4dwt_interleave_v(opj_v4dwt_t* restrict v , OPJ_FLOAT32* restrict a , OPJ_INT32 x, OPJ_INT32 nb_elts_read);

#ifdef __SSE__

static void opj_v4dwt_decode_step1_sse(opj_v4_t* w, OPJ_INT32 count, const __m128 c);

static void opj_v4dwt_decode_step2_sse(opj_v4_t* l, opj_v4_t* w, OPJ_INT32 k, OPJ_INT32 m, __m128 c);

#else

static void opj_v4dwt_decode_step1(opj_v4_t* w, OPJ_INT32 count, const OPJ_FLOAT32 c);

static void opj_v4dwt_decode_step2(opj_v4_t* l, opj_v4_t* w, OPJ_INT32 k, OPJ_INT32 m, OPJ_FLOAT32 c);

#endif

/*@}*/

/*@}*/

#define OPJ_S(i) a[(i)*2]

#define OPJ_D(i) a[(1+(i)*2)]

#define OPJ_S_(i) ((i)<0?OPJ_S(0):((i)>=sn?OPJ_S(sn-1):OPJ_S(i)))

#define OPJ_D_(i) ((i)<0?OPJ_D(0):((i)>=dn?OPJ_D(dn-1):OPJ_D(i)))

/* new */

#define OPJ_SS_(i) ((i)<0?OPJ_S(0):((i)>=dn?OPJ_S(dn-1):OPJ_S(i)))

#define OPJ_DD_(i) ((i)<0?OPJ_D(0):((i)>=sn?OPJ_D(sn-1):OPJ_D(i)))

/* <summary>                                                              */

/* This table contains the norms of the 5-3 wavelets for different bands. */

/* </summary>                                                             */

static const OPJ_FLOAT64 opj_dwt_norms[4][10] = {

  {1.000, 1.500, 2.750, 5.375, 10.68, 21.34, 42.67, 85.33, 170.7, 341.3},

  {1.038, 1.592, 2.919, 5.703, 11.33, 22.64, 45.25, 90.48, 180.9},

  {1.038, 1.592, 2.919, 5.703, 11.33, 22.64, 45.25, 90.48, 180.9},

  {.7186, .9218, 1.586, 3.043, 6.019, 12.01, 24.00, 47.97, 95.93}

};

/* <summary>                                                              */

/* This table contains the norms of the 9-7 wavelets for different bands. */

/* </summary>                                                             */

static const OPJ_FLOAT64 opj_dwt_norms_real[4][10] = {

  {1.000, 1.965, 4.177, 8.403, 16.90, 33.84, 67.69, 135.3, 270.6, 540.9},

  {2.022, 3.989, 8.355, 17.04, 34.27, 68.63, 137.3, 274.6, 549.0},

  {2.022, 3.989, 8.355, 17.04, 34.27, 68.63, 137.3, 274.6, 549.0},

  {2.080, 3.865, 8.307, 17.18, 34.71, 69.59, 139.3, 278.6, 557.2}

};

/* 

==========================================================

   local functions

==========================================================

*/

/* <summary>                       */

/* Forward lazy transform (horizontal).  */

/* </summary>                            */ 

void opj_dwt_deinterleave_h(OPJ_INT32 *a, OPJ_INT32 *b, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas) {

  OPJ_INT32 i;

  OPJ_INT32 * l_dest = b;

  OPJ_INT32 * l_src = a+cas;

    for (i=0; i<sn; ++i) {

    *l_dest++ = *l_src;

    l_src += 2;

  }

    l_dest = b + sn;

  l_src = a + 1 - cas;

    for (i=0; i<dn; ++i)  {

    *l_dest++=*l_src;

    l_src += 2;

  }

}

/* <summary>                             */  

/* Forward lazy transform (vertical).    */

/* </summary>                            */ 

void opj_dwt_deinterleave_v(OPJ_INT32 *a, OPJ_INT32 *b, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 x, OPJ_INT32 cas) {

    OPJ_INT32 i = sn;

  OPJ_INT32 * l_dest = b;

  OPJ_INT32 * l_src = a+cas;

    while (i--) {

    *l_dest = *l_src;

    l_dest += x;

    l_src += 2;

    } /* b[i*x]=a[2*i+cas]; */

  l_dest = b + sn * x;

  l_src = a + 1 - cas;

  i = dn;

    while (i--) {

    *l_dest = *l_src;

    l_dest += x;

    l_src += 2;

        } /*b[(sn+i)*x]=a[(2*i+1-cas)];*/

}

/* <summary>                             */

/* Inverse lazy transform (horizontal).  */

/* </summary>                            */

void opj_dwt_interleave_h(opj_dwt_t* h, OPJ_INT32 *a) {

    OPJ_INT32 *ai = a;

    OPJ_INT32 *bi = h->mem + h->cas;

    OPJ_INT32  i  = h->sn;

    while( i-- ) {

      *bi = *(ai++);

    bi += 2;

    }

    ai  = a + h->sn;

    bi  = h->mem + 1 - h->cas;

    i = h->dn ;

    while( i-- ) {

      *bi = *(ai++);

    bi += 2;

    }

}

/* <summary>                             */  

/* Inverse lazy transform (vertical).    */

/* </summary>                            */ 

void opj_dwt_interleave_v(opj_dwt_t* v, OPJ_INT32 *a, OPJ_INT32 x) {

    OPJ_INT32 *ai = a;

    OPJ_INT32 *bi = v->mem + v->cas;

    OPJ_INT32  i = v->sn;

    while( i-- ) {

      *bi = *ai;

    bi += 2;

    ai += x;

    }

    ai = a + (v->sn * x);

    bi = v->mem + 1 - v->cas;

    i = v->dn ;

    while( i-- ) {

      *bi = *ai;

    bi += 2;  

    ai += x;

    }

}

/* <summary>                            */

/* Forward 5-3 wavelet transform in 1-D. */

/* </summary>                           */

void opj_dwt_encode_1(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas) {

  OPJ_INT32 i;

  if (!cas) {

    if ((dn > 0) || (sn > 1)) { /* NEW :  CASE ONE ELEMENT */

      for (i = 0; i < dn; i++) OPJ_D(i) -= (OPJ_S_(i) + OPJ_S_(i + 1)) >> 1;

      for (i = 0; i < sn; i++) OPJ_S(i) += (OPJ_D_(i - 1) + OPJ_D_(i) + 2) >> 2;

    }

  } else {

    if (!sn && dn == 1)       /* NEW :  CASE ONE ELEMENT */

      OPJ_S(0) *= 2;

    else {

      for (i = 0; i < dn; i++) OPJ_S(i) -= (OPJ_DD_(i) + OPJ_DD_(i - 1)) >> 1;

      for (i = 0; i < sn; i++) OPJ_D(i) += (OPJ_SS_(i) + OPJ_SS_(i + 1) + 2) >> 2;

    }

  }

}

/* <summary>                            */

/* Inverse 5-3 wavelet transform in 1-D. */

/* </summary>                           */ 

void opj_dwt_decode_1_(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas) {

  OPJ_INT32 i;

  if (!cas) {

    if ((dn > 0) || (sn > 1)) { /* NEW :  CASE ONE ELEMENT */

      for (i = 0; i < sn; i++) OPJ_S(i) -= (OPJ_D_(i - 1) + OPJ_D_(i) + 2) >> 2;

      for (i = 0; i < dn; i++) OPJ_D(i) += (OPJ_S_(i) + OPJ_S_(i + 1)) >> 1;

    }

  } else {

    if (!sn  && dn == 1)          /* NEW :  CASE ONE ELEMENT */

      OPJ_S(0) /= 2;

    else {

      for (i = 0; i < sn; i++) OPJ_D(i) -= (OPJ_SS_(i) + OPJ_SS_(i + 1) + 2) >> 2;

      for (i = 0; i < dn; i++) OPJ_S(i) += (OPJ_DD_(i) + OPJ_DD_(i - 1)) >> 1;

    }

  }

}

/* <summary>                            */

/* Inverse 5-3 wavelet transform in 1-D. */

/* </summary>                           */ 

void opj_dwt_decode_1(opj_dwt_t *v) {

  opj_dwt_decode_1_(v->mem, v->dn, v->sn, v->cas);

}

/* <summary>                             */

/* Forward 9-7 wavelet transform in 1-D. */

/* </summary>                            */

void opj_dwt_encode_1_real(OPJ_INT32 *a, OPJ_INT32 dn, OPJ_INT32 sn, OPJ_INT32 cas) {

  OPJ_INT32 i;

  if (!cas) {

    if ((dn > 0) || (sn > 1)) { /* NEW :  CASE ONE ELEMENT */

      for (i = 0; i < dn; i++)

        OPJ_D(i) -= opj_int_fix_mul(OPJ_S_(i) + OPJ_S_(i + 1), 12993);

      for (i = 0; i < sn; i++)

        OPJ_S(i) -= opj_int_fix_mul(OPJ_D_(i - 1) + OPJ_D_(i), 434);

      for (i = 0; i < dn; i++)

        OPJ_D(i) += opj_int_fix_mul(OPJ_S_(i) + OPJ_S_(i + 1), 7233);

      for (i = 0; i < sn; i++)

        OPJ_S(i) += opj_int_fix_mul(OPJ_D_(i - 1) + OPJ_D_(i), 3633);

      for (i = 0; i < dn; i++)

        OPJ_D(i) = opj_int_fix_mul(OPJ_D(i), 5038); /*5038 */

      for (i = 0; i < sn; i++)

        OPJ_S(i) = opj_int_fix_mul(OPJ_S(i), 6659); /*6660 */

    }

  } else {

    if ((sn > 0) || (dn > 1)) { /* NEW :  CASE ONE ELEMENT */

      for (i = 0; i < dn; i++)

        OPJ_S(i) -= opj_int_fix_mul(OPJ_DD_(i) + OPJ_DD_(i - 1), 12993);

      for (i = 0; i < sn; i++)

        OPJ_D(i) -= opj_int_fix_mul(OPJ_SS_(i) + OPJ_SS_(i + 1), 434);

      for (i = 0; i < dn; i++)

        OPJ_S(i) += opj_int_fix_mul(OPJ_DD_(i) + OPJ_DD_(i - 1), 7233);

      for (i = 0; i < sn; i++)

        OPJ_D(i) += opj_int_fix_mul(OPJ_SS_(i) + OPJ_SS_(i + 1), 3633);

      for (i = 0; i < dn; i++)

        OPJ_S(i) = opj_int_fix_mul(OPJ_S(i), 5038); /*5038 */

      for (i = 0; i < sn; i++)

        OPJ_D(i) = opj_int_fix_mul(OPJ_D(i), 6659); /*6660 */

    }

  }

}

void opj_dwt_encode_stepsize(OPJ_INT32 stepsize, OPJ_INT32 numbps, opj_stepsize_t *bandno_stepsize) {

  OPJ_INT32 p, n;

  p = opj_int_floorlog2(stepsize) - 13;

  n = 11 - opj_int_floorlog2(stepsize);

  bandno_stepsize->mant = (n < 0 ? stepsize >> -n : stepsize << n) & 0x7ff;

  bandno_stepsize->expn = numbps - p;

}

/* 

==========================================================

   DWT interface

==========================================================

*/

/* <summary>                            */

/* Forward 5-3 wavelet transform in 2-D. */

/* </summary>                           */

INLINE OPJ_BOOL opj_dwt_encode_procedure(opj_tcd_tilecomp_t * tilec,void (*p_function)(OPJ_INT32 *, OPJ_INT32,OPJ_INT32,OPJ_INT32) )

{

  OPJ_INT32 i, j, k;

  OPJ_INT32 *a = 00;

  OPJ_INT32 *aj = 00;

  OPJ_INT32 *bj = 00;

  OPJ_INT32 w, l;

  OPJ_INT32 rw;     /* width of the resolution level computed   */

  OPJ_INT32 rh;     /* height of the resolution level computed  */

  OPJ_UINT32 l_data_size;

  opj_tcd_resolution_t * l_cur_res = 0;

  opj_tcd_resolution_t * l_last_res = 0;

  w = tilec->x1-tilec->x0;

  l = (OPJ_INT32)tilec->numresolutions-1;

  a = tilec->data;

  l_cur_res = tilec->resolutions + l;

  l_last_res = l_cur_res - 1;

  l_data_size = opj_dwt_max_resolution( tilec->resolutions,tilec->numresolutions) * (OPJ_UINT32)sizeof(OPJ_INT32);

  bj = (OPJ_INT32*)opj_malloc((size_t)l_data_size);

  if (! bj) {

    return OPJ_FALSE;

  }

  i = l;

  while (i--) {

    OPJ_INT32 rw1;    /* width of the resolution level once lower than computed one                                       */

    OPJ_INT32 rh1;    /* height of the resolution level once lower than computed one                                      */

    OPJ_INT32 cas_col;  /* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */

    OPJ_INT32 cas_row;  /* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering   */

    OPJ_INT32 dn, sn;

    rw  = l_cur_res->x1 - l_cur_res->x0;

    rh  = l_cur_res->y1 - l_cur_res->y0;

    rw1 = l_last_res->x1 - l_last_res->x0;

    rh1 = l_last_res->y1 - l_last_res->y0;

    cas_row = l_cur_res->x0 & 1;

    cas_col = l_cur_res->y0 & 1;

    sn = rh1;

    dn = rh - rh1;

    for (j = 0; j < rw; ++j) {

      aj = a + j;

      for (k = 0; k < rh; ++k) {

        bj[k] = aj[k*w];

      }

      (*p_function) (bj, dn, sn, cas_col);

      opj_dwt_deinterleave_v(bj, aj, dn, sn, w, cas_col);

    }

    sn = rw1;

    dn = rw - rw1;

    for (j = 0; j < rh; j++) {

      aj = a + j * w;

      for (k = 0; k < rw; k++)  bj[k] = aj[k];

      (*p_function) (bj, dn, sn, cas_row);

      opj_dwt_deinterleave_h(bj, aj, dn, sn, cas_row);

    }

    l_cur_res = l_last_res;

    --l_last_res;

  }

  opj_free(bj);

  return OPJ_TRUE;

}

/* Forward 5-3 wavelet transform in 2-D. */

/* </summary>                           */

OPJ_BOOL opj_dwt_encode(opj_tcd_tilecomp_t * tilec)

{

  return opj_dwt_encode_procedure(tilec,opj_dwt_encode_1);

}

/* <summary>                            */

/* Inverse 5-3 wavelet transform in 2-D. */

/* </summary>                           */

OPJ_BOOL opj_dwt_decode(opj_tcd_tilecomp_t* tilec, OPJ_UINT32 numres) {

  return opj_dwt_decode_tile(tilec, numres, &opj_dwt_decode_1);

}

/* <summary>                          */

/* Get gain of 5-3 wavelet transform. */

/* </summary>                         */

OPJ_UINT32 opj_dwt_getgain(OPJ_UINT32 orient) {

  if (orient == 0)

    return 0;

  if (orient == 1 || orient == 2)

    return 1;

  return 2;

}

/* <summary>                */

/* Get norm of 5-3 wavelet. */

/* </summary>               */

OPJ_FLOAT64 opj_dwt_getnorm(OPJ_UINT32 level, OPJ_UINT32 orient) {

  return opj_dwt_norms[orient][level];

}

/* <summary>                             */

/* Forward 9-7 wavelet transform in 2-D. */

/* </summary>                            */

OPJ_BOOL opj_dwt_encode_real(opj_tcd_tilecomp_t * tilec)

{

  return opj_dwt_encode_procedure(tilec,opj_dwt_encode_1_real);

}

/* <summary>                          */

/* Get gain of 9-7 wavelet transform. */

/* </summary>                         */

OPJ_UINT32 opj_dwt_getgain_real(OPJ_UINT32 orient) {

  (void)orient;

  return 0;

}

/* <summary>                */

/* Get norm of 9-7 wavelet. */

/* </summary>               */

OPJ_FLOAT64 opj_dwt_getnorm_real(OPJ_UINT32 level, OPJ_UINT32 orient) {

  return opj_dwt_norms_real[orient][level];

}

void opj_dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, OPJ_UINT32 prec) {

  OPJ_UINT32 numbands, bandno;

  numbands = 3 * tccp->numresolutions - 2;

  for (bandno = 0; bandno < numbands; bandno++) {

    OPJ_FLOAT64 stepsize;

    OPJ_UINT32 resno, level, orient, gain;

    resno = (bandno == 0) ? 0 : ((bandno - 1) / 3 + 1);

    orient = (bandno == 0) ? 0 : ((bandno - 1) % 3 + 1);

    level = tccp->numresolutions - 1 - resno;

    gain = (tccp->qmfbid == 0) ? 0 : ((orient == 0) ? 0 : (((orient == 1) || (orient == 2)) ? 1 : 2));

    if (tccp->qntsty == J2K_CCP_QNTSTY_NOQNT) {

      stepsize = 1.0;

    } else {

      OPJ_FLOAT64 norm = opj_dwt_norms_real[orient][level];

      stepsize = (1 << (gain)) / norm;

    }

    opj_dwt_encode_stepsize((OPJ_INT32) floor(stepsize * 8192.0), (OPJ_INT32)(prec + gain), &tccp->stepsizes[bandno]);

  }

}

/* <summary>                             */

/* Determine maximum computed resolution level for inverse wavelet transform */

/* </summary>                            */

OPJ_UINT32 opj_dwt_max_resolution(opj_tcd_resolution_t* restrict r, OPJ_UINT32 i) {

  OPJ_UINT32 mr = 0;

  OPJ_UINT32 w;

  while( --i ) {

    ++r;

    if( mr < ( w = (OPJ_UINT32)(r->x1 - r->x0) ) )

      mr = w ;

    if( mr < ( w = (OPJ_UINT32)(r->y1 - r->y0) ) )

      mr = w ;

  }

  return mr ;

}

/* <summary>                            */

/* Inverse wavelet transform in 2-D.     */

/* </summary>                           */

OPJ_BOOL opj_dwt_decode_tile(opj_tcd_tilecomp_t* tilec, OPJ_UINT32 numres, DWT1DFN dwt_1D) {

  opj_dwt_t h;

  opj_dwt_t v;

  opj_tcd_resolution_t* tr = tilec->resolutions;

  OPJ_UINT32 rw = (OPJ_UINT32)(tr->x1 - tr->x0);  /* width of the resolution level computed */

  OPJ_UINT32 rh = (OPJ_UINT32)(tr->y1 - tr->y0);  /* height of the resolution level computed */

  OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0);

  h.mem = (OPJ_INT32*)

  opj_aligned_malloc(opj_dwt_max_resolution(tr, numres) * sizeof(OPJ_INT32));

  if (! h.mem){

    return OPJ_FALSE;

  }

  v.mem = h.mem;

  while( --numres) {

    OPJ_INT32 * restrict tiledp = tilec->data;

    OPJ_UINT32 j;

    ++tr;

    h.sn = (OPJ_INT32)rw;

    v.sn = (OPJ_INT32)rh;

    rw = (OPJ_UINT32)(tr->x1 - tr->x0);

    rh = (OPJ_UINT32)(tr->y1 - tr->y0);

    h.dn = (OPJ_INT32)(rw - (OPJ_UINT32)h.sn);

    h.cas = tr->x0 % 2;

    for(j = 0; j < rh; ++j) {

      opj_dwt_interleave_h(&h, &tiledp[j*w]);

      (dwt_1D)(&h);

      memcpy(&tiledp[j*w], h.mem, rw * sizeof(OPJ_INT32));

    }

    v.dn = (OPJ_INT32)(rh - (OPJ_UINT32)v.sn);

    v.cas = tr->y0 % 2;

    for(j = 0; j < rw; ++j){

      OPJ_UINT32 k;

      opj_dwt_interleave_v(&v, &tiledp[j], (OPJ_INT32)w);

      (dwt_1D)(&v);

      for(k = 0; k < rh; ++k) {

        tiledp[k * w + j] = v.mem[k];

      }

    }

  }

  opj_aligned_free(h.mem);

  return OPJ_TRUE;

}

void opj_v4dwt_interleave_h(opj_v4dwt_t* restrict w, OPJ_FLOAT32* restrict a, OPJ_INT32 x, OPJ_INT32 size){

  OPJ_FLOAT32* restrict bi = (OPJ_FLOAT32*) (w->wavelet + w->cas);

  OPJ_INT32 count = w->sn;

  OPJ_INT32 i, k;

  for(k = 0; k < 2; ++k){

    if ( count + 3 * x < size && ((size_t) a & 0x0f) == 0 && ((size_t) bi & 0x0f) == 0 && (x & 0x0f) == 0 ) {

      /* Fast code path */

      for(i = 0; i < count; ++i){

        OPJ_INT32 j = i;

        bi[i*8    ] = a[j];

        j += x;

        bi[i*8 + 1] = a[j];

        j += x;

        bi[i*8 + 2] = a[j];

        j += x;

        bi[i*8 + 3] = a[j];

      }

    }

    else {

      /* Slow code path */

      for(i = 0; i < count; ++i){

        OPJ_INT32 j = i;

        bi[i*8    ] = a[j];

        j += x;

        if(j >= size) continue;

        bi[i*8 + 1] = a[j];

        j += x;

        if(j >= size) continue;

        bi[i*8 + 2] = a[j];

        j += x;

        if(j >= size) continue;

        bi[i*8 + 3] = a[j]; /* This one*/

      }

    }

    bi = (OPJ_FLOAT32*) (w->wavelet + 1 - w->cas);

    a += w->sn;

    size -= w->sn;

    count = w->dn;

  }

}

void opj_v4dwt_interleave_v(opj_v4dwt_t* restrict v , OPJ_FLOAT32* restrict a , OPJ_INT32 x, OPJ_INT32 nb_elts_read){

  opj_v4_t* restrict bi = v->wavelet + v->cas;

  OPJ_INT32 i;

  for(i = 0; i < v->sn; ++i){

    memcpy(&bi[i*2], &a[i*x], (size_t)nb_elts_read * sizeof(OPJ_FLOAT32));

  }

  a += v->sn * x;

  bi = v->wavelet + 1 - v->cas;

  for(i = 0; i < v->dn; ++i){

    memcpy(&bi[i*2], &a[i*x], (size_t)nb_elts_read * sizeof(OPJ_FLOAT32));

  }

}

#ifdef __SSE__

void opj_v4dwt_decode_step1_sse(opj_v4_t* w, OPJ_INT32 count, const __m128 c){

  __m128* restrict vw = (__m128*) w;

  OPJ_INT32 i;

  /* 4x unrolled loop */

  for(i = 0; i < count >> 2; ++i){

    *vw = _mm_mul_ps(*vw, c);

    vw += 2;

    *vw = _mm_mul_ps(*vw, c);

    vw += 2;

    *vw = _mm_mul_ps(*vw, c);

    vw += 2;

    *vw = _mm_mul_ps(*vw, c);

    vw += 2;

  }

  count &= 3;

  for(i = 0; i < count; ++i){

    *vw = _mm_mul_ps(*vw, c);

    vw += 2;

  }

}

void opj_v4dwt_decode_step2_sse(opj_v4_t* l, opj_v4_t* w, OPJ_INT32 k, OPJ_INT32 m, __m128 c){

  __m128* restrict vl = (__m128*) l;

  __m128* restrict vw = (__m128*) w;

  OPJ_INT32 i;

  __m128 tmp1, tmp2, tmp3;

  tmp1 = vl[0];

  for(i = 0; i < m; ++i){

    tmp2 = vw[-1];

    tmp3 = vw[ 0];

    vw[-1] = _mm_add_ps(tmp2, _mm_mul_ps(_mm_add_ps(tmp1, tmp3), c));

    tmp1 = tmp3;

    vw += 2;

  }

  vl = vw - 2;

  if(m >= k){

    return;

  }

  c = _mm_add_ps(c, c);

  c = _mm_mul_ps(c, vl[0]);

  for(; m < k; ++m){

    __m128 tmp = vw[-1];

    vw[-1] = _mm_add_ps(tmp, c);

    vw += 2;

  }

}

#else

void opj_v4dwt_decode_step1(opj_v4_t* w, OPJ_INT32 count, const OPJ_FLOAT32 c)

{

  OPJ_FLOAT32* restrict fw = (OPJ_FLOAT32*) w;

  OPJ_INT32 i;

  for(i = 0; i < count; ++i){

    OPJ_FLOAT32 tmp1 = fw[i*8    ];

    OPJ_FLOAT32 tmp2 = fw[i*8 + 1];

    OPJ_FLOAT32 tmp3 = fw[i*8 + 2];

    OPJ_FLOAT32 tmp4 = fw[i*8 + 3];

    fw[i*8    ] = tmp1 * c;

    fw[i*8 + 1] = tmp2 * c;

    fw[i*8 + 2] = tmp3 * c;

    fw[i*8 + 3] = tmp4 * c;

  }

}

void opj_v4dwt_decode_step2(opj_v4_t* l, opj_v4_t* w, OPJ_INT32 k, OPJ_INT32 m, OPJ_FLOAT32 c)

{

  OPJ_FLOAT32* restrict fl = (OPJ_FLOAT32*) l;

  OPJ_FLOAT32* restrict fw = (OPJ_FLOAT32*) w;

  OPJ_INT32 i;

  for(i = 0; i < m; ++i){

    OPJ_FLOAT32 tmp1_1 = fl[0];

    OPJ_FLOAT32 tmp1_2 = fl[1];

    OPJ_FLOAT32 tmp1_3 = fl[2];

    OPJ_FLOAT32 tmp1_4 = fl[3];

    OPJ_FLOAT32 tmp2_1 = fw[-4];

    OPJ_FLOAT32 tmp2_2 = fw[-3];

    OPJ_FLOAT32 tmp2_3 = fw[-2];

    OPJ_FLOAT32 tmp2_4 = fw[-1];

    OPJ_FLOAT32 tmp3_1 = fw[0];

    OPJ_FLOAT32 tmp3_2 = fw[1];

    OPJ_FLOAT32 tmp3_3 = fw[2];

    OPJ_FLOAT32 tmp3_4 = fw[3];

    fw[-4] = tmp2_1 + ((tmp1_1 + tmp3_1) * c);

    fw[-3] = tmp2_2 + ((tmp1_2 + tmp3_2) * c);

    fw[-2] = tmp2_3 + ((tmp1_3 + tmp3_3) * c);

    fw[-1] = tmp2_4 + ((tmp1_4 + tmp3_4) * c);

    fl = fw;

    fw += 8;

  }

  if(m < k){

    OPJ_FLOAT32 c1;

    OPJ_FLOAT32 c2;

    OPJ_FLOAT32 c3;

    OPJ_FLOAT32 c4;

    c += c;

    c1 = fl[0] * c;

    c2 = fl[1] * c;

    c3 = fl[2] * c;

    c4 = fl[3] * c;

    for(; m < k; ++m){

      OPJ_FLOAT32 tmp1 = fw[-4];

      OPJ_FLOAT32 tmp2 = fw[-3];

      OPJ_FLOAT32 tmp3 = fw[-2];

      OPJ_FLOAT32 tmp4 = fw[-1];

      fw[-4] = tmp1 + c1;

      fw[-3] = tmp2 + c2;

      fw[-2] = tmp3 + c3;

      fw[-1] = tmp4 + c4;

      fw += 8;

    }

  }

}

#endif

/* <summary>                             */

/* Inverse 9-7 wavelet transform in 1-D. */

/* </summary>                            */

void opj_v4dwt_decode(opj_v4dwt_t* restrict dwt)

{

  OPJ_INT32 a, b;

  if(dwt->cas == 0) {

    if(!((dwt->dn > 0) || (dwt->sn > 1))){

      return;

    }

    a = 0;

    b = 1;

  }else{

    if(!((dwt->sn > 0) || (dwt->dn > 1))) {

      return;

    }

    a = 1;

    b = 0;

  }

#ifdef __SSE__

  opj_v4dwt_decode_step1_sse(dwt->wavelet+a, dwt->sn, _mm_set1_ps(opj_K));

  opj_v4dwt_decode_step1_sse(dwt->wavelet+b, dwt->dn, _mm_set1_ps(opj_c13318));

  opj_v4dwt_decode_step2_sse(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, opj_int_min(dwt->sn, dwt->dn-a), _mm_set1_ps(opj_dwt_delta));

  opj_v4dwt_decode_step2_sse(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, opj_int_min(dwt->dn, dwt->sn-b), _mm_set1_ps(opj_dwt_gamma));

  opj_v4dwt_decode_step2_sse(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, opj_int_min(dwt->sn, dwt->dn-a), _mm_set1_ps(opj_dwt_beta));

  opj_v4dwt_decode_step2_sse(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, opj_int_min(dwt->dn, dwt->sn-b), _mm_set1_ps(opj_dwt_alpha));

#else

  opj_v4dwt_decode_step1(dwt->wavelet+a, dwt->sn, opj_K);

  opj_v4dwt_decode_step1(dwt->wavelet+b, dwt->dn, opj_c13318);

  opj_v4dwt_decode_step2(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, opj_int_min(dwt->sn, dwt->dn-a), opj_dwt_delta);

  opj_v4dwt_decode_step2(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, opj_int_min(dwt->dn, dwt->sn-b), opj_dwt_gamma);

  opj_v4dwt_decode_step2(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, opj_int_min(dwt->sn, dwt->dn-a), opj_dwt_beta);

  opj_v4dwt_decode_step2(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, opj_int_min(dwt->dn, dwt->sn-b), opj_dwt_alpha);

#endif

}

/* <summary>                             */

/* Inverse 9-7 wavelet transform in 2-D. */

/* </summary>                            */

OPJ_BOOL opj_dwt_decode_real(opj_tcd_tilecomp_t* restrict tilec, OPJ_UINT32 numres)

{

  opj_v4dwt_t h;

  opj_v4dwt_t v;

  opj_tcd_resolution_t* res = tilec->resolutions;

  OPJ_UINT32 rw = (OPJ_UINT32)(res->x1 - res->x0);  /* width of the resolution level computed */

  OPJ_UINT32 rh = (OPJ_UINT32)(res->y1 - res->y0);  /* height of the resolution level computed */

  OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0);

  h.wavelet = (opj_v4_t*) opj_aligned_malloc((opj_dwt_max_resolution(res, numres)+5) * sizeof(opj_v4_t));

  v.wavelet = h.wavelet;

  while( --numres) {

    OPJ_FLOAT32 * restrict aj = (OPJ_FLOAT32*) tilec->data;

    OPJ_UINT32 bufsize = (OPJ_UINT32)((tilec->x1 - tilec->x0) * (tilec->y1 - tilec->y0));

    OPJ_INT32 j;

    h.sn = (OPJ_INT32)rw;

    v.sn = (OPJ_INT32)rh;

    ++res;

    rw = (OPJ_UINT32)(res->x1 - res->x0); /* width of the resolution level computed */

    rh = (OPJ_UINT32)(res->y1 - res->y0); /* height of the resolution level computed */

    h.dn = (OPJ_INT32)(rw - (OPJ_UINT32)h.sn);

    h.cas = res->x0 % 2;

    for(j = (OPJ_INT32)rh; j > 3; j -= 4) {

      OPJ_INT32 k;

      opj_v4dwt_interleave_h(&h, aj, (OPJ_INT32)w, (OPJ_INT32)bufsize);

      opj_v4dwt_decode(&h);

      for(k = (OPJ_INT32)rw; --k >= 0;){

        aj[k               ] = h.wavelet[k].f[0];

        aj[k+(OPJ_INT32)w  ] = h.wavelet[k].f[1];

        aj[k+(OPJ_INT32)w*2] = h.wavelet[k].f[2];

        aj[k+(OPJ_INT32)w*3] = h.wavelet[k].f[3];

      }

      aj += w*4;

      bufsize -= w*4;

    }

    if (rh & 0x03) {

      OPJ_INT32 k;

      j = rh & 0x03;

      opj_v4dwt_interleave_h(&h, aj, (OPJ_INT32)w, (OPJ_INT32)bufsize);

      opj_v4dwt_decode(&h);

      for(k = (OPJ_INT32)rw; --k >= 0;){

        switch(j) {

          case 3: aj[k+(OPJ_INT32)w*2] = h.wavelet[k].f[2];

          case 2: aj[k+(OPJ_INT32)w  ] = h.wavelet[k].f[1];

          case 1: aj[k               ] = h.wavelet[k].f[0];

        }

      }

    }

    v.dn = (OPJ_INT32)(rh - (OPJ_UINT32)v.sn);

    v.cas = res->y0 % 2;

    aj = (OPJ_FLOAT32*) tilec->data;

    for(j = (OPJ_INT32)rw; j > 3; j -= 4){

      OPJ_UINT32 k;

      opj_v4dwt_interleave_v(&v, aj, (OPJ_INT32)w, 4);

      opj_v4dwt_decode(&v);

      for(k = 0; k < rh; ++k){

        memcpy(&aj[k*w], &v.wavelet[k], 4 * sizeof(OPJ_FLOAT32));

      }

      aj += 4;

    }

    if (rw & 0x03){

      OPJ_UINT32 k;

      j = rw & 0x03;