/*

 * LIBOIL - Library of Optimized Inner Loops

 * Copyright (c) 2001,2002,2003,2004 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/liboil.h>

#include "liboil/dct/dct.h"

#include <math.h>

#include <liboil/liboiltest.h>

#include <liboil/liboilparameter.h>

#include <liboil/liboilrandom.h>

/**

 * SECTION:liboilfuncs-dct:

 * @title: Direct Cosine Transform

 * @short_description: DCT related functions

 */

#define BLOCK8x8_F64(ptr, stride, row, column) \

	(*((double *)((unsigned char *)ptr + stride*row) + column))

#define BLOCK8x8_PTR_F64(ptr, stride, row, column) \

	((double *)((unsigned char *)ptr + stride*row) + column)

#define BLOCK8x8_S16(ptr, stride, row, column) \

	(*((int16_t *)((unsigned char *)ptr + stride*row) + column))

static void

idct8x8_test (OilTest *test)

{

  int16_t *data = oil_test_get_source_data (test, OIL_ARG_SRC1);

  int stride = oil_test_get_value (test, OIL_ARG_SSTR1);

  int i, j;

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

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

      OIL_GET(data, i*2 + j*stride, int16_t) = (oil_rand_s16() & 0xfff) - 2048;

    }

  }

}

/**

 * oil_idct8x8_f64:

 * @d_8x8:

 * @dstr:

 * @s_8x8:

 * @sstr:

 *

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

 * the result in @d_8x8.

 */

OIL_DEFINE_CLASS (idct8x8_f64, "double *d_8x8, int dstr, double *s_8x8, int sstr");

/**

 * oil_idct8x8lim10_f64:

 * @d_8x8:

 * @dstr:

 * @s_8x8:

 * @sstr:

 *

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

 * the result in @d_8x8.

 */

OIL_DEFINE_CLASS (idct8x8lim10_f64, "double *d_8x8, int dstr, double *s_8x8, int sstr");

/**

 * oil_idct8x8_s16:

 * @d_8x8:

 * @dstr:

 * @s_8x8:

 * @sstr:

 *

 * Performs a limited 2-D Inverse Discrete Cosine Transform on @s_8x8

 * and places the result in @d_8x8.

 */

OIL_DEFINE_CLASS_FULL (idct8x8_s16, "int16_t *d_8x8, int dstr, int16_t *s_8x8, int sstr", idct8x8_test);

/**

 * oil_idct8x8lim10_s16:

 * @d_8x8:

 * @dstr:

 * @s_8x8:

 * @sstr:

 *

 * Performs a limited 2-D Inverse Discrete Cosine Transform on @s_8x8

 * and places the result in @d_8x8.  The source 8x8 block must be non-zero

 * only in the 10 lowest-order components.

 */

OIL_DEFINE_CLASS (idct8x8lim10_s16, "int16_t *d_8x8, int dstr, int16_t *s_8x8, int sstr");

static void

idct8x8_f64_ref (double *dest, int dstr, const double *src, int sstr)

{

	static double idct_coeff[8][8];

	static int idct_coeff_init = 0;

	int i,j,k,l;

	double tmp1,tmp2;

	if(!idct_coeff_init){

		double scale;

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

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

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

				idct_coeff[j][i] = scale *

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

			}

		}

		idct_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 += idct_coeff[j][l] *

						BLOCK8x8_F64(src,sstr,k,l);

				}

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

			}

			BLOCK8x8_F64(dest,dstr,i,j) = tmp1;

		}

	}

}

OIL_DEFINE_IMPL_REF (idct8x8_f64_ref, idct8x8_f64);

static void

idct8x8lim10_f64_ref (double *dest, int dstr, const double *src, int sstr)

{

	static double idct_coeff[8][8];

	static int idct_coeff_init = 0;

	int i,j,k,l;

	double tmp1,tmp2;

	if(!idct_coeff_init){

		double scale;

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

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

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

				idct_coeff[j][i] = scale *

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

			}

		}

		idct_coeff_init = 1;

	}

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

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

			tmp1 = 0;

			for(k=0;k<4;k++){

				tmp2 = 0;

				for(l=0;l<4;l++){

					tmp2 += idct_coeff[j][l] *

						BLOCK8x8_F64(src,sstr,k,l);

				}

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

			}

			BLOCK8x8_F64(dest,dstr,i,j) = tmp1;

		}

	}

}

OIL_DEFINE_IMPL_REF (idct8x8lim10_f64_ref, idct8x8lim10_f64);

#if defined(oil_idct8_f64)

static void

idct8x8_f64_c (double *dest, int dstr, const double *src, int sstr)

{

	int i;

	double tmp[64];

	int tmpstr = 8*sizeof(double);

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

		oil_idct8_f64(

			BLOCK8x8_PTR_F64(tmp,tmpstr,i,0), sizeof(double),

			BLOCK8x8_PTR_F64(src,sstr,i,0), sizeof(double));

	}

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

		oil_idct8_f64(

			BLOCK8x8_PTR_F64(dest,dstr,0,i), dstr,

			BLOCK8x8_PTR_F64(tmp,tmpstr,0,i), tmpstr);

	}

}

OIL_DEFINE_IMPL_DEPENDS (idct8x8_f64_c, idct8x8_f64, idct8_f64);

#endif

#if defined(oil_conv8x8_f64_s16) && defined(oil_idct8x8_f64) && \

    defined(oil_conv8x8_s16_f64)

static void

idct8x8_s16_ref (int16_t *dest, int dstr, const int16_t *src, int sstr)

{

	double s[64], d[64];

	oil_conv8x8_f64_s16 (s,8*sizeof(double),src,sstr);

	oil_idct8x8_f64 (d,8*sizeof(double),s,8*sizeof(double));

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

}

OIL_DEFINE_IMPL_REF (idct8x8_s16_ref, idct8x8_s16);

#if 0

OIL_DEFINE_IMPL_DEPENDS (idct8x8_s16_ref, idct8x8_s16,

    conv8x8_f64_s16, idct8x8_f64, conv8x8_s16_f64);

#endif

#endif

#if defined(oil_conv8x8_f64_s16) && defined(oil_idct8x8lim10_f64) && \

    defined(oil_conv8x8_s16_f64)

static void

idct8x8lim10_s16_ref (int16_t *dest, int dstr, const int16_t *src, int sstr)

{

	double s[64], d[64];

	oil_conv8x8_f64_s16 (s,8*sizeof(double),src,sstr);

	oil_idct8x8lim10_f64 (d,8*sizeof(double),s,8*sizeof(double));

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

}

OIL_DEFINE_IMPL_REF (idct8x8lim10_s16_ref, idct8x8lim10_s16);

#if 0

OIL_DEFINE_IMPL_DEPENDS (idct8x8_s16_ref, idct8x8_s16,

    conv8x8_f64_s16, idct8x8_f64, conv8x8_s16_f64);

#endif

#endif

#ifdef	__SYMBIAN32__

OilFunctionClass* __oil_function_class_idct8x8_f64() {

		return &_oil_function_class_idct8x8_f64;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionClass* __oil_function_class_idct8x8lim10_f64() {

		return &_oil_function_class_idct8x8lim10_f64;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionClass* __oil_function_class_idct8x8_s16() {

		return &_oil_function_class_idct8x8_s16;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionClass* __oil_function_class_idct8x8lim10_s16() {

		return &_oil_function_class_idct8x8lim10_s16;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_idct8x8_f64_ref() {

		return &_oil_function_impl_idct8x8_f64_ref;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_idct8x8lim10_f64_ref() {

		return &_oil_function_impl_idct8x8lim10_f64_ref;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_idct8x8_s16_ref() {

		return &_oil_function_impl_idct8x8_s16_ref;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_idct8x8lim10_s16_ref() {

		return &_oil_function_impl_idct8x8lim10_s16_ref;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_idct8x8_f64_c() {

		return &_oil_function_impl_idct8x8_f64_c;

}

#endif

#ifdef	__SYMBIAN32__

EXPORT_C void** _oil_function_class_ptr_idct8x8_f64 ()	{

	oil_function_class_ptr_idct8x8_f64 = __oil_function_class_idct8x8_f64();

	return &oil_function_class_ptr_idct8x8_f64->func;

	}

#endif

#ifdef	__SYMBIAN32__

EXPORT_C void** _oil_function_class_ptr_idct8x8lim10_f64 ()	{

	oil_function_class_ptr_idct8x8lim10_f64 = __oil_function_class_idct8x8lim10_f64();

	return &oil_function_class_ptr_idct8x8lim10_f64->func;

	}

#endif

#ifdef	__SYMBIAN32__

EXPORT_C void** _oil_function_class_ptr_idct8x8_s16 ()	{

	oil_function_class_ptr_idct8x8_s16 = __oil_function_class_idct8x8_s16();

	return &oil_function_class_ptr_idct8x8_s16->func;

	}

#endif

#ifdef	__SYMBIAN32__

EXPORT_C void** _oil_function_class_ptr_idct8x8lim10_s16 ()	{

	oil_function_class_ptr_idct8x8lim10_s16 = __oil_function_class_idct8x8lim10_s16();

	return &oil_function_class_ptr_idct8x8lim10_s16->func;

	}

#endif