sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: 
sl@0: #include <liboil/liboilfunction.h>
sl@0: #include <liboil/liboilfuncs.h>
sl@0: #include "liboil/dct/dct.h"
sl@0: #include <math.h>
sl@0: 
sl@0: 
sl@0: /**
sl@0:  * oil_fdct8x8_f64:
sl@0:  * @d_8x8:
sl@0:  * @dstr:
sl@0:  * @s_8x8:
sl@0:  * @sstr:
sl@0:  *
sl@0:  * Performs a 2-D Forward Discrete Cosine Transform on @s_8x8 and places
sl@0:  * the result in @d_8x8.
sl@0:  */
sl@0: OIL_DEFINE_CLASS(fdct8x8_f64,
sl@0:     "double *d_8x8, int dstr, double *s_8x8, int sstr");
sl@0: 
sl@0: 
sl@0: static void
sl@0: fdct8x8_f64_ref(double *dest, int dstr, const double *src, int sstr)
sl@0: {
sl@0: 	static double fdct_coeff[8][8];
sl@0: 	static int fdct_coeff_init = 0;
sl@0: 	int i,j,k,l;
sl@0: 	double tmp1,tmp2;
sl@0: 
sl@0: 	if(!fdct_coeff_init){
sl@0: 		double scale;
sl@0: 
sl@0: 		for(i=0;i<8;i++){
sl@0: 			scale = (i==0) ? sqrt(0.125) : 0.5;
sl@0: 			for(j=0;j<8;j++){
sl@0: 				fdct_coeff[j][i] = scale *
sl@0: 					cos((M_PI/8)*i*(j+0.5));
sl@0: 			}
sl@0: 		}
sl@0: 		fdct_coeff_init = 1;
sl@0: 	}
sl@0: 
sl@0: 	for(i=0;i<8;i++){
sl@0: 		for(j=0;j<8;j++){
sl@0: 			tmp1 = 0;
sl@0: 			for(k=0;k<8;k++){
sl@0: 				tmp2 = 0;
sl@0: 				for(l=0;l<8;l++){
sl@0: 					tmp2 += fdct_coeff[l][j] *
sl@0: 					  OIL_GET (src, sstr*k + l * sizeof(double),
sl@0:                                               double);
sl@0: 				}
sl@0: 				tmp1 += fdct_coeff[k][i] * tmp2;
sl@0: 			}
sl@0: 			OIL_GET (dest, dstr*i + j*sizeof(double), double) =
sl@0:                           tmp1;
sl@0: 		}
sl@0: 	}
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL_REF (fdct8x8_f64_ref, fdct8x8_f64);
sl@0: 
sl@0: static void
sl@0: fdct8x8_f64_ref2(double *dest, int dstr, const double *src, int sstr)
sl@0: {
sl@0: 	static double fdct_coeff[8][8];
sl@0: 	static int fdct_coeff_init = 0;
sl@0: 	int i,j,k;
sl@0: 	double x;
sl@0: 	double tmp[64];
sl@0: 
sl@0: 	if(!fdct_coeff_init){
sl@0: 		double scale;
sl@0: 
sl@0: 		for(i=0;i<8;i++){
sl@0: 			scale = (i==0) ? sqrt(0.125) : 0.5;
sl@0: 			for(j=0;j<8;j++){
sl@0: 				fdct_coeff[j][i] = scale *
sl@0: 					cos((M_PI/8)*i*(j+0.5));
sl@0: 			}
sl@0: 		}
sl@0: 		fdct_coeff_init = 1;
sl@0: 	}
sl@0: 
sl@0: 	for(i=0;i<8;i++){
sl@0: 		for(j=0;j<8;j++){
sl@0: 			x = 0;
sl@0: 			for(k=0;k<8;k++){
sl@0: 				x += fdct_coeff[k][j] *
sl@0: 				  OIL_GET (src, sstr*i + k * sizeof(double), double);
sl@0: 			}
sl@0: 			tmp[8*i+j] = x;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 	for(j=0;j<8;j++){
sl@0: 		for(i=0;i<8;i++){
sl@0: 			x = 0;
sl@0: 			for(k=0;k<8;k++){
sl@0: 				x += fdct_coeff[k][i] * tmp[8*k + j];
sl@0: 			}
sl@0: 			OIL_GET (dest,dstr*i+j*sizeof(double), double) = x;
sl@0: 		}
sl@0: 	}
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL (fdct8x8_f64_ref2, fdct8x8_f64);
sl@0: 
sl@0: #ifdef oil_fdct8_f64
sl@0: static void
sl@0: fdct8x8_f64_1d (double *dest, int dstr, const double *src, int sstr)
sl@0: {
sl@0: 	int i;
sl@0: 	double tmp[64];
sl@0: 
sl@0: 	for(i=0;i<8;i++){
sl@0: 		oil_fdct8_f64(tmp + i*8, OIL_OFFSET(src,sstr*i),
sl@0:                     sizeof (double), sizeof(double));
sl@0: 	}
sl@0: 
sl@0: 	for(i=0;i<8;i++){
sl@0: 		oil_fdct8_f64(dest + i, tmp + i,
sl@0:                     dstr, 8*sizeof(double));
sl@0: 	}
sl@0: }
sl@0: OIL_DEFINE_IMPL (fdct8x8_f64_1d, fdct8x8_f64);
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionClass* __oil_function_class_fdct8x8_f64() {
sl@0: 		return &_oil_function_class_fdct8x8_f64;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_fdct8x8_f64_ref() {
sl@0: 		return &_oil_function_impl_fdct8x8_f64_ref;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_fdct8x8_f64_ref2() {
sl@0: 		return &_oil_function_impl_fdct8x8_f64_ref2;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_fdct8x8_f64_1d() {
sl@0: 		return &_oil_function_impl_fdct8x8_f64_1d;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: EXPORT_C void** _oil_function_class_ptr_fdct8x8_f64 ()	{
sl@0: 	oil_function_class_ptr_fdct8x8_f64 = __oil_function_class_fdct8x8_f64();
sl@0: 	return &oil_function_class_ptr_fdct8x8_f64->func;
sl@0: 	}
sl@0: #endif
sl@0: