/*

 * 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