/*

 * 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) 2008;2011-2012, Centre National d'Etudes Spatiales (CNES), France 

 * Copyright (c) 2012, CS Systemes d'Information, France

 * 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"

/* <summary> */

/* This table contains the norms of the basis function of the reversible MCT. */

/* </summary> */

static const OPJ_FLOAT64 opj_mct_norms[3] = { 1.732, .8292, .8292 };

/* <summary> */

/* This table contains the norms of the basis function of the irreversible MCT. */

/* </summary> */

static const OPJ_FLOAT64 opj_mct_norms_real[3] = { 1.732, 1.805, 1.573 };

const OPJ_FLOAT64 * opj_mct_get_mct_norms ()

{

  return opj_mct_norms;

}

const OPJ_FLOAT64 * opj_mct_get_mct_norms_real ()

{

  return opj_mct_norms_real;

}

/* <summary> */

/* Foward reversible MCT. */

/* </summary> */

void opj_mct_encode(

    OPJ_INT32* restrict c0,

    OPJ_INT32* restrict c1,

    OPJ_INT32* restrict c2,

    OPJ_UINT32 n)

{

  OPJ_UINT32 i;

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

    OPJ_INT32 r = c0[i];

    OPJ_INT32 g = c1[i];

    OPJ_INT32 b = c2[i];

    OPJ_INT32 y = (r + (g * 2) + b) >> 2;

    OPJ_INT32 u = b - g;

    OPJ_INT32 v = r - g;

    c0[i] = y;

    c1[i] = u;

    c2[i] = v;

  }

}

/* <summary> */

/* Inverse reversible MCT. */

/* </summary> */

void opj_mct_decode(

    OPJ_INT32* restrict c0,

    OPJ_INT32* restrict c1, 

    OPJ_INT32* restrict c2, 

    OPJ_UINT32 n)

{

  OPJ_UINT32 i;

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

    OPJ_INT32 y = c0[i];

    OPJ_INT32 u = c1[i];

    OPJ_INT32 v = c2[i];

    OPJ_INT32 g = y - ((u + v) >> 2);

    OPJ_INT32 r = v + g;

    OPJ_INT32 b = u + g;

    c0[i] = r;

    c1[i] = g;

    c2[i] = b;

  }

}

/* <summary> */

/* Get norm of basis function of reversible MCT. */

/* </summary> */

OPJ_FLOAT64 opj_mct_getnorm(OPJ_UINT32 compno) {

  return opj_mct_norms[compno];

}

/* <summary> */

/* Foward irreversible MCT. */

/* </summary> */

void opj_mct_encode_real(

    OPJ_INT32* restrict c0,

    OPJ_INT32* restrict c1,

    OPJ_INT32* restrict c2,

    OPJ_UINT32 n)

{

  OPJ_UINT32 i;

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

    OPJ_INT32 r = c0[i];

    OPJ_INT32 g = c1[i];

    OPJ_INT32 b = c2[i];

    OPJ_INT32 y =  opj_int_fix_mul(r, 2449) + opj_int_fix_mul(g, 4809) + opj_int_fix_mul(b, 934);

    OPJ_INT32 u = -opj_int_fix_mul(r, 1382) - opj_int_fix_mul(g, 2714) + opj_int_fix_mul(b, 4096);

    OPJ_INT32 v =  opj_int_fix_mul(r, 4096) - opj_int_fix_mul(g, 3430) - opj_int_fix_mul(b, 666);

    c0[i] = y;

    c1[i] = u;

    c2[i] = v;

  }

}

/* <summary> */

/* Inverse irreversible MCT. */

/* </summary> */

void opj_mct_decode_real(

    OPJ_FLOAT32* restrict c0,

    OPJ_FLOAT32* restrict c1,

    OPJ_FLOAT32* restrict c2,

    OPJ_UINT32 n)

{

  OPJ_UINT32 i;

#ifdef __SSE__

  __m128 vrv, vgu, vgv, vbu;

  vrv = _mm_set1_ps(1.402f);

  vgu = _mm_set1_ps(0.34413f);

  vgv = _mm_set1_ps(0.71414f);

  vbu = _mm_set1_ps(1.772f);

  for (i = 0; i < (n >> 3); ++i) {

    __m128 vy, vu, vv;

    __m128 vr, vg, vb;

    vy = _mm_load_ps(c0);

    vu = _mm_load_ps(c1);

    vv = _mm_load_ps(c2);

    vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));

    vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));

    vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));

    _mm_store_ps(c0, vr);

    _mm_store_ps(c1, vg);

    _mm_store_ps(c2, vb);

    c0 += 4;

    c1 += 4;

    c2 += 4;

    vy = _mm_load_ps(c0);

    vu = _mm_load_ps(c1);

    vv = _mm_load_ps(c2);

    vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));

    vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));

    vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));

    _mm_store_ps(c0, vr);

    _mm_store_ps(c1, vg);

    _mm_store_ps(c2, vb);

    c0 += 4;

    c1 += 4;

    c2 += 4;

  }

  n &= 7;

#endif

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

    OPJ_FLOAT32 y = c0[i];

    OPJ_FLOAT32 u = c1[i];

    OPJ_FLOAT32 v = c2[i];

    OPJ_FLOAT32 r = y + (v * 1.402f);

    OPJ_FLOAT32 g = y - (u * 0.34413f) - (v * (0.71414f));

    OPJ_FLOAT32 b = y + (u * 1.772f);

    c0[i] = r;

    c1[i] = g;

    c2[i] = b;

  }

}

/* <summary> */

/* Get norm of basis function of irreversible MCT. */

/* </summary> */

OPJ_FLOAT64 opj_mct_getnorm_real(OPJ_UINT32 compno) {

  return opj_mct_norms_real[compno];

}

OPJ_BOOL opj_mct_encode_custom(

             OPJ_BYTE * pCodingdata,

             OPJ_UINT32 n,

             OPJ_BYTE ** pData,

             OPJ_UINT32 pNbComp,

             OPJ_UINT32 isSigned)

{

  OPJ_FLOAT32 * lMct = (OPJ_FLOAT32 *) pCodingdata;

  OPJ_UINT32 i;

  OPJ_UINT32 j;

  OPJ_UINT32 k;

  OPJ_UINT32 lNbMatCoeff = pNbComp * pNbComp;

  OPJ_INT32 * lCurrentData = 00;

  OPJ_INT32 * lCurrentMatrix = 00;

  OPJ_INT32 ** lData = (OPJ_INT32 **) pData;

  OPJ_UINT32 lMultiplicator = 1 << 13;

  OPJ_INT32 * lMctPtr;

    OPJ_ARG_NOT_USED(isSigned);

  lCurrentData = (OPJ_INT32 *) opj_malloc((pNbComp + lNbMatCoeff) * sizeof(OPJ_INT32));

  if (! lCurrentData) {

    return OPJ_FALSE;

  }

  lCurrentMatrix = lCurrentData + pNbComp;

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

    lCurrentMatrix[i] = (OPJ_INT32) (*(lMct++) * (OPJ_FLOAT32)lMultiplicator);

  }

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

    lMctPtr = lCurrentMatrix;

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

      lCurrentData[j] = (*(lData[j]));

    }

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

      *(lData[j]) = 0;

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

        *(lData[j]) += opj_int_fix_mul(*lMctPtr, lCurrentData[k]);

        ++lMctPtr;

      }

      ++lData[j];

    }

  }

  opj_free(lCurrentData);

  return OPJ_TRUE;

}

OPJ_BOOL opj_mct_decode_custom(

             OPJ_BYTE * pDecodingData,

             OPJ_UINT32 n,

             OPJ_BYTE ** pData,

             OPJ_UINT32 pNbComp,

             OPJ_UINT32 isSigned)

{

  OPJ_FLOAT32 * lMct;

  OPJ_UINT32 i;

  OPJ_UINT32 j;

  OPJ_UINT32 k;

  OPJ_FLOAT32 * lCurrentData = 00;

  OPJ_FLOAT32 * lCurrentResult = 00;

  OPJ_FLOAT32 ** lData = (OPJ_FLOAT32 **) pData;

    OPJ_ARG_NOT_USED(isSigned);

  lCurrentData = (OPJ_FLOAT32 *) opj_malloc (2 * pNbComp * sizeof(OPJ_FLOAT32));

  if (! lCurrentData) {

    return OPJ_FALSE;

  }

  lCurrentResult = lCurrentData + pNbComp;

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

    lMct = (OPJ_FLOAT32 *) pDecodingData;

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

      lCurrentData[j] = (OPJ_FLOAT32) (*(lData[j]));

    }

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

      lCurrentResult[j] = 0;

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

        lCurrentResult[j] += *(lMct++) * lCurrentData[k];

      }

      *(lData[j]++) = (OPJ_FLOAT32) (lCurrentResult[j]);

    }

  }

  opj_free(lCurrentData);

  return OPJ_TRUE;

}

void opj_calculate_norms( OPJ_FLOAT64 * pNorms,

              OPJ_UINT32 pNbComps,

              OPJ_FLOAT32 * pMatrix)

{

  OPJ_UINT32 i,j,lIndex;

  OPJ_FLOAT32 lCurrentValue;

  OPJ_FLOAT64 * lNorms = (OPJ_FLOAT64 *) pNorms;

  OPJ_FLOAT32 * lMatrix = (OPJ_FLOAT32 *) pMatrix;

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

    lNorms[i] = 0;

    lIndex = i;

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

      lCurrentValue = lMatrix[lIndex];

      lIndex += pNbComps;

      lNorms[i] += lCurrentValue * lCurrentValue;

    }

    lNorms[i] = sqrt(lNorms[i]);

  }

}