/*

  * LIBOIL - Library of Optimized Inner Loops

  * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>

  * 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 AUTHOR ``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 AUTHOR 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.

  */

 //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 #ifdef HAVE_CONFIG_H

 #include "config.h"

 #endif

 #include <liboil/liboilfunction.h>

 #include <liboil/liboilfuncs.h>

 #include "liboil/dct/dct.h"

 #include <math.h>

 /**

  * oil_fdct8x8_f64:

  * @d_8x8:

  * @dstr:

  * @s_8x8:

  * @sstr:

  *

  * Performs a 2-D Forward Discrete Cosine Transform on @s_8x8 and places

  * the result in @d_8x8.

  */

 OIL_DEFINE_CLASS(fdct8x8_f64,

     "double *d_8x8, int dstr, double *s_8x8, int sstr");

 static void

 fdct8x8_f64_ref(double *dest, int dstr, const double *src, int sstr)

 {

 	static double fdct_coeff[8][8];

 	static int fdct_coeff_init = 0;

 	int i,j,k,l;

 	double tmp1,tmp2;

 	if(!fdct_coeff_init){

 		double scale;

 		for(i=0;i<8;i++){

 			scale = (i==0) ? sqrt(0.125) : 0.5;

 			for(j=0;j<8;j++){

 				fdct_coeff[j][i] = scale *

 					cos((M_PI/8)*i*(j+0.5));

 			}

 		}

 		fdct_coeff_init = 1;

 	}

 	for(i=0;i<8;i++){

 		for(j=0;j<8;j++){

 			tmp1 = 0;

 			for(k=0;k<8;k++){

 				tmp2 = 0;

 				for(l=0;l<8;l++){

 					tmp2 += fdct_coeff[l][j] *

 					  OIL_GET (src, sstr*k + l * sizeof(double),

                                               double);

 				}

 				tmp1 += fdct_coeff[k][i] * tmp2;

 			}

 			OIL_GET (dest, dstr*i + j*sizeof(double), double) =

                           tmp1;

 		}

 	}

 }

 OIL_DEFINE_IMPL_REF (fdct8x8_f64_ref, fdct8x8_f64);

 static void

 fdct8x8_f64_ref2(double *dest, int dstr, const double *src, int sstr)

 {

 	static double fdct_coeff[8][8];

 	static int fdct_coeff_init = 0;

 	int i,j,k;

 	double x;

 	double tmp[64];

 	if(!fdct_coeff_init){

 		double scale;

 		for(i=0;i<8;i++){

 			scale = (i==0) ? sqrt(0.125) : 0.5;

 			for(j=0;j<8;j++){

 				fdct_coeff[j][i] = scale *

 					cos((M_PI/8)*i*(j+0.5));

 			}

 		}

 		fdct_coeff_init = 1;

 	}

 	for(i=0;i<8;i++){

 		for(j=0;j<8;j++){

 			x = 0;

 			for(k=0;k<8;k++){

 				x += fdct_coeff[k][j] *

 				  OIL_GET (src, sstr*i + k * sizeof(double), double);

 			}

 			tmp[8*i+j] = x;

 		}

 	}

 	for(j=0;j<8;j++){

 		for(i=0;i<8;i++){

 			x = 0;

 			for(k=0;k<8;k++){

 				x += fdct_coeff[k][i] * tmp[8*k + j];

 			}

 			OIL_GET (dest,dstr*i+j*sizeof(double), double) = x;

 		}

 	}

 }

 OIL_DEFINE_IMPL (fdct8x8_f64_ref2, fdct8x8_f64);

 #ifdef oil_fdct8_f64

 static void

 fdct8x8_f64_1d (double *dest, int dstr, const double *src, int sstr)

 {

 	int i;

 	double tmp[64];

 	for(i=0;i<8;i++){

 		oil_fdct8_f64(tmp + i*8, OIL_OFFSET(src,sstr*i),

                     sizeof (double), sizeof(double));

 	}

 	for(i=0;i<8;i++){

 		oil_fdct8_f64(dest + i, tmp + i,

                     dstr, 8*sizeof(double));

 	}

 }

 OIL_DEFINE_IMPL (fdct8x8_f64_1d, fdct8x8_f64);

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_fdct8x8_f64() {

 		return &_oil_function_class_fdct8x8_f64;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_fdct8x8_f64_ref() {

 		return &_oil_function_impl_fdct8x8_f64_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_fdct8x8_f64_ref2() {

 		return &_oil_function_impl_fdct8x8_f64_ref2;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_fdct8x8_f64_1d() {

 		return &_oil_function_impl_fdct8x8_f64_1d;

 }

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_fdct8x8_f64 ()	{

 	oil_function_class_ptr_fdct8x8_f64 = __oil_function_class_fdct8x8_f64();

 	return &oil_function_class_ptr_fdct8x8_f64->func;

 	}

 #endif