/*

  * 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/dct/dct.h"

 #include <math.h>

 /**

  * oil_mdct12_f64:

  * @d_6:

  * @s_12:

  *

  * Performs a Modified Discrete Cosine Transform (MDCT)

  * on the source array @s_12 and places the result in @d_6.

  */

 OIL_DEFINE_CLASS (mdct12_f64, "double *d_6, double *s_12");

 /**

  * oil_imdct12_f64:

  * @d_12:

  * @s_6:

  *

  * Performs a Inverse Modified Discrete Cosine Transform (IMDCT)

  * on the source array @s_6 and places the result in @d_12.

  */

 OIL_DEFINE_CLASS (imdct12_f64, "double *d_12, double *s_6");

 /**

  * oil_mdct36_f64:

  * @d_18:

  * @s_36:

  *

  * Performs a Modified Discrete Cosine Transform (MDCT)

  * on the source array @s_36 and places the result in @d_18.

  */

 OIL_DEFINE_CLASS (mdct36_f64, "double *d_18, double *s_36");

 /**

  * oil_imdct36_f64:

  * @d_36:

  * @s_18:

  *

  * Performs a Inverse Modified Discrete Cosine Transform (IMDCT)

  * on the source array @s_18 and places the result in @d_36.

  */

 OIL_DEFINE_CLASS (imdct36_f64, "double *d_36, double *s_18");

 static void

 mdct12_f64_ref(double *dest, const double *src)

 {

   int j, k;

   double x;

   int N = 6;

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

     x = 0;

     for(k=0;k<2*N;k++){

       x += src[k] * cos (M_PI/N * (j+0.5) * (k + 0.5 * (N+1)));

     }

     dest[j] = x;

   }

 }

 OIL_DEFINE_IMPL_REF (mdct12_f64_ref, mdct12_f64);

 static void

 imdct12_f64_ref(double *dest, const double *src)

 {

   int j,k;

   double x;

   int N = 6;

   for(k=0;k<2*N;k++){

     x = 0;

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

       x += src[j] * cos (M_PI/N * (j+0.5) * (k+0.5*(N + 1)));

     }

     dest[k] = x;

   }

 }

 OIL_DEFINE_IMPL_REF (imdct12_f64_ref, imdct12_f64);

 static void

 mdct36_f64_ref(double *dest, const double *src)

 {

   int j, k;

   double x;

   int N = 18;

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

     x = 0;

     for(k=0;k<2*N;k++){

       x += src[k] * cos (M_PI/N * (j+0.5) * (k + 0.5 * (N+1)));

     }

     dest[j] = x;

   }

 }

 OIL_DEFINE_IMPL_REF (mdct36_f64_ref, mdct36_f64);

 static void

 imdct36_f64_ref(double *dest, const double *src)

 {

   int j,k;

   double x;

   int N = 18;

   for(k=0;k<2*N;k++){

     x = 0;

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

       x += src[j] * cos (M_PI/N * (j+0.5) * (k+0.5*(N + 1)));

     }

     dest[k] = x;

   }

 }

 OIL_DEFINE_IMPL_REF (imdct36_f64_ref, imdct36_f64);

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_mdct12_f64() {

 		return &_oil_function_class_mdct12_f64;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_imdct12_f64() {

 		return &_oil_function_class_imdct12_f64;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_mdct36_f64() {

 		return &_oil_function_class_mdct36_f64;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionClass* __oil_function_class_imdct36_f64() {

 		return &_oil_function_class_imdct36_f64;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_mdct12_f64_ref() {

 		return &_oil_function_impl_mdct12_f64_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_imdct12_f64_ref() {

 		return &_oil_function_impl_imdct12_f64_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_mdct36_f64_ref() {

 		return &_oil_function_impl_mdct36_f64_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_imdct36_f64_ref() {

 		return &_oil_function_impl_imdct36_f64_ref;

 }

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_mdct12_f64 ()	{

 	oil_function_class_ptr_mdct12_f64 = __oil_function_class_mdct12_f64();

 	return &oil_function_class_ptr_mdct12_f64->func;

 	}

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_imdct12_f64 ()	{

 	oil_function_class_ptr_imdct12_f64 = __oil_function_class_imdct12_f64();

 	return &oil_function_class_ptr_imdct12_f64->func;

 	}

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_mdct36_f64 ()	{

 	oil_function_class_ptr_mdct36_f64 = __oil_function_class_mdct36_f64();

 	return &oil_function_class_ptr_mdct36_f64->func;

 	}

 #endif

 #ifdef	__SYMBIAN32__

 EXPORT_C void** _oil_function_class_ptr_imdct36_f64 ()	{

 	oil_function_class_ptr_imdct36_f64 = __oil_function_class_imdct36_f64();

 	return &oil_function_class_ptr_imdct36_f64->func;

 	}

 #endif