/*

  * 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"

 #define C0_9808 0.980785280

 #define C0_9239 0.923879532

 #define C0_8315 0.831469612

 #define C0_7071 0.707106781

 #define C0_5556 0.555570233

 #define C0_3827 0.382683432

 #define C0_1951 0.195090322

 /**

  * oil_fdct8x8s_s16:

  * @d_8x8:

  * @ds:

  * @s_8x8:

  * @ss:

  *

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

  * the result in @d_8x8.

  *

  * This function uses an alternate scaling used by RTjpeg.

  */

 OIL_DEFINE_CLASS(fdct8x8s_s16,

     "int16_t *d_8x8, int ds, int16_t *s_8x8, int ss");

 #if defined(oil_fdct8x8_f64) && defined(oil_conv8x8_s16_f64)

 static void

 fdct8x8s_s16_ref (int16_t *dest, int dstr, const int16_t *src, int sstr)

 {

 	double s[64], d[64];

 	double scale[8] = {

 		4*C0_7071,

 		4*C0_9808,

 		4*C0_9239,

 		4*C0_8315,

 		4*C0_7071,

 		4*C0_5556,

 		4*C0_3827,

 		4*C0_1951,

 	};

 	int i,j;

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

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

 			s[8*i+j] = OIL_GET (src,sstr*i+j*sizeof(int16_t), int16_t);

 		}

 	}

 	oil_fdct8x8_f64(d,8*sizeof(double),s,8*sizeof(double));

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

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

 			d[8*i+j] *= scale[i] * scale[j];

 		}

 	}

 	oil_conv8x8_s16_f64(dest,dstr,d,8*sizeof(double));

 }

 OIL_DEFINE_IMPL_REF (fdct8x8s_s16_ref, fdct8x8s_s16);

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_fdct8x8s_s16() {

 		return &_oil_function_class_fdct8x8s_s16;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_fdct8x8s_s16_ref() {

 		return &_oil_function_impl_fdct8x8s_s16_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_fdct8x8s_s16 ()	{

 	oil_function_class_ptr_fdct8x8s_s16 = __oil_function_class_fdct8x8s_s16();

 	return &oil_function_class_ptr_fdct8x8s_s16->func;

 	}

 #endif