text: /*
   * 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 WS(i) v->mem[(i)*2]
  #define WD(i) v->mem[(1+(i)*2)]
  
  /** @name Local data structures */
  /*@{*/
  
  typedef struct dwt_local {
  	int* mem;
  	int dn;
  	int sn;
  	int cas;
  } dwt_t;
  
  typedef union {
  	float	f[4];
  } v4;
  
  typedef struct v4dwt_local {
  	v4*	wavelet ;
  	int		dn ;
  	int		sn ;
  	int		cas ;
  } v4dwt_t ;
  
  static const float dwt_alpha =  1.586134342f; //  12994
  static const float dwt_beta  =  0.052980118f; //    434
  static const float dwt_gamma = -0.882911075f; //  -7233
  static const float dwt_delta = -0.443506852f; //  -3633
  
  static const float K      = 1.230174105f; //  10078
  /* FIXME: What is this constant? */
  static const float c13318 = 1.625732422f;
  
  /*@}*/
  
  /**
  Virtual function type for wavelet transform in 1-D 
  */
  typedef void (*DWT1DFN)(dwt_t* v);
  
  /** @name Local static functions */
  /*@{*/
  
  /**
  Forward lazy transform (horizontal)
  */
  static void dwt_deinterleave_h(int *a, int *b, int dn, int sn, int cas);
  /**
  Forward lazy transform (vertical)
  */
  static void dwt_deinterleave_v(int *a, int *b, int dn, int sn, int x, int cas);
  /**
  Inverse lazy transform (horizontal)
  */
  static void dwt_interleave_h(dwt_t* h, int *a);
  /**
  Inverse lazy transform (vertical)
  */
  static void dwt_interleave_v(dwt_t* v, int *a, int x);
  /**
  Forward 5-3 wavelet transform in 1-D
  */
  static void dwt_encode_1(int *a, int dn, int sn, int cas);
  /**
  Inverse 5-3 wavelet transform in 1-D
  */
  static void dwt_decode_1(dwt_t *v);
  /**
  Forward 9-7 wavelet transform in 1-D
  */
  static void dwt_encode_1_real(int *a, int dn, int sn, int cas);
  /**
  Explicit calculation of the Quantization Stepsizes 
  */
  static void dwt_encode_stepsize(int stepsize, int numbps, opj_stepsize_t *bandno_stepsize);
  /**
  Inverse wavelet transform in 2-D.
  */
  static void dwt_decode_tile(opj_tcd_tilecomp_t* tilec, int i, DWT1DFN fn);
  
  /*@}*/
  
  /*@}*/
  
  #define S(i) a[(i)*2]
  #define D(i) a[(1+(i)*2)]
  #define S_(i) ((i)<0?S(0):((i)>=sn?S(sn-1):S(i)))
  #define D_(i) ((i)<0?D(0):((i)>=dn?D(dn-1):D(i)))
  /* new */
  #define SS_(i) ((i)<0?S(0):((i)>=dn?S(dn-1):S(i)))
  #define DD_(i) ((i)<0?D(0):((i)>=sn?D(sn-1):D(i)))
  
  /* <summary>                                                              */
  /* This table contains the norms of the 5-3 wavelets for different bands. */
  /* </summary>                                                             */
  static const double 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 double 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>                            */ 
  static void dwt_deinterleave_h(int *a, int *b, int dn, int sn, int cas) {
  	int i;
      for (i=0; i<sn; i++) b[i]=a[2*i+cas];
      for (i=0; i<dn; i++) b[sn+i]=a[(2*i+1-cas)];
  }
  
  /* <summary>                             */  
  /* Forward lazy transform (vertical).    */
  /* </summary>                            */ 
  static void dwt_deinterleave_v(int *a, int *b, int dn, int sn, int x, int cas) {
      int i;
      for (i=0; i<sn; i++) b[i*x]=a[2*i+cas];
      for (i=0; i<dn; i++) b[(sn+i)*x]=a[(2*i+1-cas)];
  }
  
  /* <summary>                             */
  /* Inverse lazy transform (horizontal).  */
  /* </summary>                            */
  static void dwt_interleave_h(dwt_t* h, int *a) {
      int *ai = a;
      int *bi = h->mem + h->cas;
      int  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>                            */ 
  static void dwt_interleave_v(dwt_t* v, int *a, int x) {
      int *ai = a;
      int *bi = v->mem + v->cas;
      int  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>                           */
  static void dwt_encode_1(int *a, int dn, int sn, int cas) {
  	int i;
  	
  	if (!cas) {
  		if ((dn > 0) || (sn > 1)) {	/* NEW :  CASE ONE ELEMENT */
  			for (i = 0; i < dn; i++) D(i) -= (S_(i) + S_(i + 1)) >> 1;
  			for (i = 0; i < sn; i++) S(i) += (D_(i - 1) + D_(i) + 2) >> 2;
  		}
  	} else {
  		if (!sn && dn == 1)		    /* NEW :  CASE ONE ELEMENT */
  			S(0) *= 2;
  		else {
  			for (i = 0; i < dn; i++) S(i) -= (DD_(i) + DD_(i - 1)) >> 1;
  			for (i = 0; i < sn; i++) D(i) += (SS_(i) + SS_(i + 1) + 2) >> 2;
  		}
  	}
  }
  
  /* <summary>                            */
  /* Inverse 5-3 wavelet transform in 1-D. */
  /* </summary>                           */ 
  static void dwt_decode_1_(int *a, int dn, int sn, int cas) {
  	int i;
  	
  	if (!cas) {
  		if ((dn > 0) || (sn > 1)) { /* NEW :  CASE ONE ELEMENT */
  			for (i = 0; i < sn; i++) S(i) -= (D_(i - 1) + D_(i) + 2) >> 2;
  			for (i = 0; i < dn; i++) D(i) += (S_(i) + S_(i + 1)) >> 1;
  		}
  	} else {
  		if (!sn  && dn == 1)          /* NEW :  CASE ONE ELEMENT */
  			S(0) /= 2;
  		else {
  			for (i = 0; i < sn; i++) D(i) -= (SS_(i) + SS_(i + 1) + 2) >> 2;
  			for (i = 0; i < dn; i++) S(i) += (DD_(i) + DD_(i - 1)) >> 1;
  		}
  	}
  }
  
  /* <summary>                            */
  /* Inverse 5-3 wavelet transform in 1-D. */
  /* </summary>                           */ 
  static void dwt_decode_1(dwt_t *v) {
  	dwt_decode_1_(v->mem, v->dn, v->sn, v->cas);
  }
  
  /* <summary>                             */
  /* Forward 9-7 wavelet transform in 1-D. */
  /* </summary>                            */
  static void dwt_encode_1_real(int *a, int dn, int sn, int cas) {
  	int i;
  	if (!cas) {
  		if ((dn > 0) || (sn > 1)) {	/* NEW :  CASE ONE ELEMENT */
  			for (i = 0; i < dn; i++)
  				D(i) -= fix_mul(S_(i) + S_(i + 1), 12993);
  			for (i = 0; i < sn; i++)
  				S(i) -= fix_mul(D_(i - 1) + D_(i), 434);
  			for (i = 0; i < dn; i++)
  				D(i) += fix_mul(S_(i) + S_(i + 1), 7233);
  			for (i = 0; i < sn; i++)
  				S(i) += fix_mul(D_(i - 1) + D_(i), 3633);
  			for (i = 0; i < dn; i++)
  				D(i) = fix_mul(D(i), 5038);	/*5038 */
  			for (i = 0; i < sn; i++)
  				S(i) = fix_mul(S(i), 6659);	/*6660 */
  		}
  	} else {
  		if ((sn > 0) || (dn > 1)) {	/* NEW :  CASE ONE ELEMENT */
  			for (i = 0; i < dn; i++)
  				S(i) -= fix_mul(DD_(i) + DD_(i - 1), 12993);
  			for (i = 0; i < sn; i++)
  				D(i) -= fix_mul(SS_(i) + SS_(i + 1), 434);
  			for (i = 0; i < dn; i++)
  				S(i) += fix_mul(DD_(i) + DD_(i - 1), 7233);
  			for (i = 0; i < sn; i++)
  				D(i) += fix_mul(SS_(i) + SS_(i + 1), 3633);
  			for (i = 0; i < dn; i++)
  				S(i) = fix_mul(S(i), 5038);	/*5038 */
  			for (i = 0; i < sn; i++)
  				D(i) = fix_mul(D(i), 6659);	/*6660 */
  		}
  	}
  }
  
  static void dwt_encode_stepsize(int stepsize, int numbps, opj_stepsize_t *bandno_stepsize) {
  	int p, n;
  	p = int_floorlog2(stepsize) - 13;
  	n = 11 - 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>                           */
  void dwt_encode(opj_tcd_tilecomp_t * tilec) {
  	int i, j, k;
  	int *a = NULL;
  	int *aj = NULL;
  	int *bj = NULL;
  	int w, l;
  	
  	w = tilec->x1-tilec->x0;
  	l = tilec->numresolutions-1;
  	a = tilec->data;
  	
  	for (i = 0; i < l; i++) {
  		int rw;			/* width of the resolution level computed                                                           */
  		int rh;			/* height of the resolution level computed                                                          */
  		int rw1;		/* width of the resolution level once lower than computed one                                       */
  		int rh1;		/* height of the resolution level once lower than computed one                                      */
  		int cas_col;	/* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
  		int cas_row;	/* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering   */
  		int dn, sn;
  		
  		rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
  		rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
  		rw1= tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
  		rh1= tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
  		
  		cas_row = tilec->resolutions[l - i].x0 % 2;
  		cas_col = tilec->resolutions[l - i].y0 % 2;
          
  		sn = rh1;
  		dn = rh - rh1;
  		bj = (int*)opj_malloc(rh * sizeof(int));
  		for (j = 0; j < rw; j++) {
  			aj = a + j;
  			for (k = 0; k < rh; k++)  bj[k] = aj[k*w];
  			dwt_encode_1(bj, dn, sn, cas_col);
  			dwt_deinterleave_v(bj, aj, dn, sn, w, cas_col);
  		}
  		opj_free(bj);
  		
  		sn = rw1;
  		dn = rw - rw1;
  		bj = (int*)opj_malloc(rw * sizeof(int));
  		for (j = 0; j < rh; j++) {
  			aj = a + j * w;
  			for (k = 0; k < rw; k++)  bj[k] = aj[k];
  			dwt_encode_1(bj, dn, sn, cas_row);
  			dwt_deinterleave_h(bj, aj, dn, sn, cas_row);
  		}
  		opj_free(bj);
  	}
  }
  
  
  /* <summary>                            */
  /* Inverse 5-3 wavelet transform in 2-D. */
  /* </summary>                           */
  void dwt_decode(opj_tcd_tilecomp_t* tilec, int numres) {
  	dwt_decode_tile(tilec, numres, &dwt_decode_1);
  }
  
  
  /* <summary>                          */
  /* Get gain of 5-3 wavelet transform. */
  /* </summary>                         */
  int dwt_getgain(int orient) {
  	if (orient == 0)
  		return 0;
  	if (orient == 1 || orient == 2)
  		return 1;
  	return 2;
  }
  
  /* <summary>                */
  /* Get norm of 5-3 wavelet. */
  /* </summary>               */
  double dwt_getnorm(int level, int orient) {
  	return dwt_norms[orient][level];
  }
  
  /* <summary>                             */
  /* Forward 9-7 wavelet transform in 2-D. */
  /* </summary>                            */
  
  void dwt_encode_real(opj_tcd_tilecomp_t * tilec) {
  	int i, j, k;
  	int *a = NULL;
  	int *aj = NULL;
  	int *bj = NULL;
  	int w, l;
  	
  	w = tilec->x1-tilec->x0;
  	l = tilec->numresolutions-1;
  	a = tilec->data;
  	
  	for (i = 0; i < l; i++) {
  		int rw;			/* width of the resolution level computed                                                     */
  		int rh;			/* height of the resolution level computed                                                    */
  		int rw1;		/* width of the resolution level once lower than computed one                                 */
  		int rh1;		/* height of the resolution level once lower than computed one                                */
  		int cas_col;	/* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
  		int cas_row;	/* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering   */
  		int dn, sn;
  		
  		rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
  		rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
  		rw1= tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
  		rh1= tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
  		
  		cas_row = tilec->resolutions[l - i].x0 % 2;
  		cas_col = tilec->resolutions[l - i].y0 % 2;
  		
  		sn = rh1;
  		dn = rh - rh1;
  		bj = (int*)opj_malloc(rh * sizeof(int));
  		for (j = 0; j < rw; j++) {
  			aj = a + j;
  			for (k = 0; k < rh; k++)  bj[k] = aj[k*w];
  			dwt_encode_1_real(bj, dn, sn, cas_col);
  			dwt_deinterleave_v(bj, aj, dn, sn, w, cas_col);
  		}
  		opj_free(bj);
  		
  		sn = rw1;
  		dn = rw - rw1;
  		bj = (int*)opj_malloc(rw * sizeof(int));
  		for (j = 0; j < rh; j++) {
  			aj = a + j * w;
  			for (k = 0; k < rw; k++)  bj[k] = aj[k];
  			dwt_encode_1_real(bj, dn, sn, cas_row);
  			dwt_deinterleave_h(bj, aj, dn, sn, cas_row);
  		}
  		opj_free(bj);
  	}
  }
  
  
  /* <summary>                          */
  /* Get gain of 9-7 wavelet transform. */
  /* </summary>                         */
  int dwt_getgain_real(int orient) {
  	(void)orient;
  	return 0;
  }
  
  /* <summary>                */
  /* Get norm of 9-7 wavelet. */
  /* </summary>               */
  double dwt_getnorm_real(int level, int orient) {
  	return dwt_norms_real[orient][level];
  }
  
  void dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, int prec) {
  	int numbands, bandno;
  	numbands = 3 * tccp->numresolutions - 2;
  	for (bandno = 0; bandno < numbands; bandno++) {
  		double stepsize;
  		int 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 {
  			double norm = dwt_norms_real[orient][level];
  			stepsize = (1 << (gain)) / norm;
  		}
  		dwt_encode_stepsize((int) floor(stepsize * 8192.0), prec + gain, &tccp->stepsizes[bandno]);
  	}
  }
  
  
  /* <summary>                             */
  /* Determine maximum computed resolution level for inverse wavelet transform */
  /* </summary>                            */
  static int dwt_decode_max_resolution(opj_tcd_resolution_t* restrict r, int i) {
  	int mr	= 1;
  	int w;
  	while( --i ) {
  		r++;
  		if( mr < ( w = r->x1 - r->x0 ) )
  			mr = w ;
  		if( mr < ( w = r->y1 - r->y0 ) )
  			mr = w ;
  	}
  	return mr ;
  }
  
  
  /* <summary>                            */
  /* Inverse wavelet transform in 2-D.     */
  /* </summary>                           */
  static void dwt_decode_tile(opj_tcd_tilecomp_t* tilec, int numres, DWT1DFN dwt_1D) {
  	dwt_t h;
  	dwt_t v;
  
  	opj_tcd_resolution_t* tr = tilec->resolutions;
  
  	int rw = tr->x1 - tr->x0;	/* width of the resolution level computed */
  	int rh = tr->y1 - tr->y0;	/* height of the resolution level computed */
  
  	int w = tilec->x1 - tilec->x0;
  
  	h.mem = opj_aligned_malloc(dwt_decode_max_resolution(tr, numres) * sizeof(int));
  	v.mem = h.mem;
  
  	while( --numres) {
  		int * restrict tiledp = tilec->data;
  		int j;
  
  		++tr;
  		h.sn = rw;
  		v.sn = rh;
  
  		rw = tr->x1 - tr->x0;
  		rh = tr->y1 - tr->y0;
  
  		h.dn = rw - h.sn;
  		h.cas = tr->x0 % 2;
  
  		for(j = 0; j < rh; ++j) {
  			dwt_interleave_h(&h, &tiledp[j*w]);
  			(dwt_1D)(&h);
  			memcpy(&tiledp[j*w], h.mem, rw * sizeof(int));
  		}
  
  		v.dn = rh - v.sn;
  		v.cas = tr->y0 % 2;
  
  		for(j = 0; j < rw; ++j){
  			int k;
  			dwt_interleave_v(&v, &tiledp[j], w);
  			(dwt_1D)(&v);
  			for(k = 0; k < rh; ++k) {
  				tiledp[k * w + j] = v.mem[k];
  			}
  		}
  	}
  	opj_aligned_free(h.mem);
  }
  
  static void v4dwt_interleave_h(v4dwt_t* restrict w, float* restrict a, int x, int size){
  	float* restrict bi = (float*) (w->wavelet + w->cas);
  	int count = w->sn;
  	int i, k;
  	for(k = 0; k < 2; ++k){
  		for(i = 0; i < count; ++i){
  			int 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];
  		}
  		bi = (float*) (w->wavelet + 1 - w->cas);
  		a += w->sn;
  		size -= w->sn;
  		count = w->dn;
  	}
  }
  
  static void v4dwt_interleave_v(v4dwt_t* restrict v , float* restrict a , int x){
  	v4* restrict bi = v->wavelet + v->cas;
  	int i;
  	for(i = 0; i < v->sn; ++i){
  		memcpy(&bi[i*2], &a[i*x], 4 * sizeof(float));
  	}
  	a += v->sn * x;
  	bi = v->wavelet + 1 - v->cas;
  	for(i = 0; i < v->dn; ++i){
  		memcpy(&bi[i*2], &a[i*x], 4 * sizeof(float));
  	}
  }
  
  #ifdef __SSE__
  
  static void v4dwt_decode_step1_sse(v4* w, int count, const __m128 c){
  	__m128* restrict vw = (__m128*) w;
  	int i;
  	for(i = 0; i < count; ++i){
  		__m128 tmp = vw[i*2];
  		vw[i*2] = _mm_mul_ps(tmp, c);
  	}
  }
  
  static void v4dwt_decode_step2_sse(v4* l, v4* w, int k, int m, __m128 c){
  	__m128* restrict vl = (__m128*) l;
  	__m128* restrict vw = (__m128*) w;
  	int i;
  	for(i = 0; i < m; ++i){
  		__m128 tmp1 = vl[ 0];
  		__m128 tmp2 = vw[-1];
  		__m128 tmp3 = vw[ 0];
  		vw[-1] = _mm_add_ps(tmp2, _mm_mul_ps(_mm_add_ps(tmp1, tmp3), c));
  		vl = vw;
  		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
  
  static void v4dwt_decode_step1(v4* w, int count, const float c){
  	float* restrict fw = (float*) w;
  	int i;
  	for(i = 0; i < count; ++i){
  		float tmp1 = fw[i*8    ];
  		float tmp2 = fw[i*8 + 1];
  		float tmp3 = fw[i*8 + 2];
  		float 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;
  	}
  }
  
  static void v4dwt_decode_step2(v4* l, v4* w, int k, int m, float c){
  	float* restrict fl = (float*) l;
  	float* restrict fw = (float*) w;
  	int i;
  	for(i = 0; i < m; ++i){
  		float tmp1_1 = fl[0];
  		float tmp1_2 = fl[1];
  		float tmp1_3 = fl[2];
  		float tmp1_4 = fl[3];
  		float tmp2_1 = fw[-4];
  		float tmp2_2 = fw[-3];
  		float tmp2_3 = fw[-2];
  		float tmp2_4 = fw[-1];
  		float tmp3_1 = fw[0];
  		float tmp3_2 = fw[1];
  		float tmp3_3 = fw[2];
  		float 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){
  		float c1;
  		float c2;
  		float c3;
  		float c4;
  		c += c;
  		c1 = fl[0] * c;
  		c2 = fl[1] * c;
  		c3 = fl[2] * c;
  		c4 = fl[3] * c;
  		for(; m < k; ++m){
  			float tmp1 = fw[-4];
  			float tmp2 = fw[-3];
  			float tmp3 = fw[-2];
  			float 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>                            */
  static void v4dwt_decode(v4dwt_t* restrict dwt){
  	int 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__
  	v4dwt_decode_step1_sse(dwt->wavelet+a, dwt->sn, _mm_set1_ps(K));
  	v4dwt_decode_step1_sse(dwt->wavelet+b, dwt->dn, _mm_set1_ps(c13318));
  	v4dwt_decode_step2_sse(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, int_min(dwt->sn, dwt->dn-a), _mm_set1_ps(dwt_delta));
  	v4dwt_decode_step2_sse(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, int_min(dwt->dn, dwt->sn-b), _mm_set1_ps(dwt_gamma));
  	v4dwt_decode_step2_sse(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, int_min(dwt->sn, dwt->dn-a), _mm_set1_ps(dwt_beta));
  	v4dwt_decode_step2_sse(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, int_min(dwt->dn, dwt->sn-b), _mm_set1_ps(dwt_alpha));
  #else
  	v4dwt_decode_step1(dwt->wavelet+a, dwt->sn, K);
  	v4dwt_decode_step1(dwt->wavelet+b, dwt->dn, c13318);
  	v4dwt_decode_step2(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, int_min(dwt->sn, dwt->dn-a), dwt_delta);
  	v4dwt_decode_step2(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, int_min(dwt->dn, dwt->sn-b), dwt_gamma);
  	v4dwt_decode_step2(dwt->wavelet+b, dwt->wavelet+a+1, dwt->sn, int_min(dwt->sn, dwt->dn-a), dwt_beta);
  	v4dwt_decode_step2(dwt->wavelet+a, dwt->wavelet+b+1, dwt->dn, int_min(dwt->dn, dwt->sn-b), dwt_alpha);
  #endif
  }
  
  /* <summary>                             */
  /* Inverse 9-7 wavelet transform in 2-D. */
  /* </summary>                            */
  void dwt_decode_real(opj_tcd_tilecomp_t* restrict tilec, int numres){
  	v4dwt_t h;
  	v4dwt_t v;
  
  	opj_tcd_resolution_t* res = tilec->resolutions;
  
  	int rw = res->x1 - res->x0;	/* width of the resolution level computed */
  	int rh = res->y1 - res->y0;	/* height of the resolution level computed */
  
  	int w = tilec->x1 - tilec->x0;
  
  	h.wavelet = (v4*) opj_aligned_malloc((dwt_decode_max_resolution(res, numres)+5) * sizeof(v4));
  	v.wavelet = h.wavelet;
  
  	while( --numres) {
  		float * restrict aj = (float*) tilec->data;
  		int bufsize = (tilec->x1 - tilec->x0) * (tilec->y1 - tilec->y0);
  		int j;
  
  		h.sn = rw;
  		v.sn = rh;
  
  		++res;
  
  		rw = res->x1 - res->x0;	/* width of the resolution level computed */
  		rh = res->y1 - res->y0;	/* height of the resolution level computed */
  
  		h.dn = rw - h.sn;
  		h.cas = res->x0 % 2;
  
  		for(j = rh; j > 0; j -= 4){
  			v4dwt_interleave_h(&h, aj, w, bufsize);
  			v4dwt_decode(&h);
  			if(j >= 4){
  				int k;
  				for(k = rw; --k >= 0;){
  					aj[k    ] = h.wavelet[k].f[0];
  					aj[k+w  ] = h.wavelet[k].f[1];
  					aj[k+w*2] = h.wavelet[k].f[2];
  					aj[k+w*3] = h.wavelet[k].f[3];
  				}
  			}else{
  				int k;
  				for(k = rw; --k >= 0;){
  					switch(j) {
  						case 3: aj[k+w*2] = h.wavelet[k].f[2];
  						case 2: aj[k+w  ] = h.wavelet[k].f[1];
  						case 1: aj[k    ] = h.wavelet[k].f[0];
  					}
  				}
  			}
  			aj += w*4;
  			bufsize -= w*4;
  		}
  
  		v.dn = rh - v.sn;
  		v.cas = res->y0 % 2;
  
  		aj = (float*) tilec->data;
  		for(j = rw; j > 0; j -= 4){
  			v4dwt_interleave_v(&v, aj, w);
  			v4dwt_decode(&v);
  			if(j >= 4){
  				int k;
  				for(k = 0; k < rh; ++k){
  					memcpy(&aj[k*w], &v.wavelet[k], 4 * sizeof(float));
  				}
  			}else{
  				int k;
  				for(k = 0; k < rh; ++k){
  					memcpy(&aj[k*w], &v.wavelet[k], j * sizeof(float));
  				}
  			}
  			aj += 4;
  		}
  	}
  
  	opj_aligned_free(h.wavelet);
  }
  
  