/*
* 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.
*/
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id: fdct8x8theora.c,v 1.3 2005-12-16 17:30:40 ds Exp $
********************************************************************/
//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"
#include <math.h>
static int32_t xC1S7 = 64277;
static int32_t xC2S6 = 60547;
static int32_t xC3S5 = 54491;
static int32_t xC4S4 = 46341;
static int32_t xC5S3 = 36410;
static int32_t xC6S2 = 25080;
static int32_t xC7S1 = 12785;
#define SIGNBITDUPPED(X) ((signed )(((X) & 0x80000000)) >> 31)
#define DOROUND(X) ( (SIGNBITDUPPED(X) & (0xffff)) + (X) )
/**
* oil_fdct8x8theora:
* @s_8x8:
* @d_8x8:
*
* Calculates the FDCT transformation of @s_8x8 according to the Theora
* specification and places the result in @d_8x8.
*
* Note that the source and destination arrays are reversed compared
* to normal Liboil order.
*/
OIL_DEFINE_CLASS(fdct8x8theora, "int16_t *s_8x8, int16_t *d_8x8");
static void
fdct8x8theora_ref(const int16_t *src, int16_t *dest)
{
int loop;
int32_t is07, is12, is34, is56;
int32_t is0734, is1256;
int32_t id07, id12, id34, id56;
int32_t irot_input_x, irot_input_y;
int32_t icommon_product1; /* Re-used product (c4s4 * (s12 - s56)). */
int32_t icommon_product2; /* Re-used product (c4s4 * (d12 + d56)). */
int32_t temp1, temp2; /* intermediate variable for computation */
int32_t InterData[64];
int32_t *ip = InterData;
int16_t * op = dest;
for (loop = 0; loop < 8; loop++){
/* Pre calculate some common sums and differences. */
is07 = src[0] + src[7];
is12 = src[1] + src[2];
is34 = src[3] + src[4];
is56 = src[5] + src[6];
id07 = src[0] - src[7];
id12 = src[1] - src[2];
id34 = src[3] - src[4];
id56 = src[5] - src[6];
is0734 = is07 + is34;
is1256 = is12 + is56;
/* Pre-Calculate some common product terms. */
icommon_product1 = xC4S4*(is12 - is56);
icommon_product1 = DOROUND(icommon_product1);
icommon_product1>>=16;
icommon_product2 = xC4S4*(id12 + id56);
icommon_product2 = DOROUND(icommon_product2);
icommon_product2>>=16;
ip[0] = (xC4S4*(is0734 + is1256));
ip[0] = DOROUND(ip[0]);
ip[0] >>= 16;
ip[4] = (xC4S4*(is0734 - is1256));
ip[4] = DOROUND(ip[4]);
ip[4] >>= 16;
/* Define inputs to rotation for outputs 2 and 6 */
irot_input_x = id12 - id56;
irot_input_y = is07 - is34;
/* Apply rotation for outputs 2 and 6. */
temp1=xC6S2*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC2S6*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
ip[2] = temp1 + temp2;
temp1=xC6S2*irot_input_y;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC2S6*irot_input_x ;
temp2=DOROUND(temp2);
temp2>>=16;
ip[6] = temp1 -temp2 ;
/* Define inputs to rotation for outputs 1 and 7 */
irot_input_x = icommon_product1 + id07;
irot_input_y = -( id34 + icommon_product2 );
/* Apply rotation for outputs 1 and 7. */
temp1=xC1S7*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC7S1*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
ip[1] = temp1 - temp2;
temp1=xC7S1*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC1S7*irot_input_y ;
temp2=DOROUND(temp2);
temp2>>=16;
ip[7] = temp1 + temp2 ;
/* Define inputs to rotation for outputs 3 and 5 */
irot_input_x = id07 - icommon_product1;
irot_input_y = id34 - icommon_product2;
/* Apply rotation for outputs 3 and 5. */
temp1=xC3S5*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC5S3*irot_input_y ;
temp2=DOROUND(temp2);
temp2>>=16;
ip[3] = temp1 - temp2 ;
temp1=xC5S3*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC3S5*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
ip[5] = temp1 + temp2;
/* Increment data pointer for next row. */
src += 8 ;
ip += 8; /* advance pointer to next row */
}
/* Performed DCT on rows, now transform the columns */
ip = InterData;
for (loop = 0; loop < 8; loop++){
/* Pre calculate some common sums and differences. */
is07 = ip[0 * 8] + ip[7 * 8];
is12 = ip[1 * 8] + ip[2 * 8];
is34 = ip[3 * 8] + ip[4 * 8];
is56 = ip[5 * 8] + ip[6 * 8];
id07 = ip[0 * 8] - ip[7 * 8];
id12 = ip[1 * 8] - ip[2 * 8];
id34 = ip[3 * 8] - ip[4 * 8];
id56 = ip[5 * 8] - ip[6 * 8];
is0734 = is07 + is34;
is1256 = is12 + is56;
/* Pre-Calculate some common product terms. */
icommon_product1 = xC4S4*(is12 - is56) ;
icommon_product2 = xC4S4*(id12 + id56) ;
icommon_product1 = DOROUND(icommon_product1);
icommon_product2 = DOROUND(icommon_product2);
icommon_product1>>=16;
icommon_product2>>=16;
temp1 = xC4S4*(is0734 + is1256) ;
temp2 = xC4S4*(is0734 - is1256) ;
temp1 = DOROUND(temp1);
temp2 = DOROUND(temp2);
temp1>>=16;
temp2>>=16;
op[0*8] = (int16_t) temp1;
op[4*8] = (int16_t) temp2;
/* Define inputs to rotation for outputs 2 and 6 */
irot_input_x = id12 - id56;
irot_input_y = is07 - is34;
/* Apply rotation for outputs 2 and 6. */
temp1=xC6S2*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC2S6*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
op[2*8] = (int16_t) (temp1 + temp2);
temp1=xC6S2*irot_input_y;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC2S6*irot_input_x ;
temp2=DOROUND(temp2);
temp2>>=16;
op[6*8] = (int16_t) (temp1 -temp2) ;
/* Define inputs to rotation for outputs 1 and 7 */
irot_input_x = icommon_product1 + id07;
irot_input_y = -( id34 + icommon_product2 );
/* Apply rotation for outputs 1 and 7. */
temp1=xC1S7*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC7S1*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
op[1*8] = (int16_t) (temp1 - temp2);
temp1=xC7S1*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC1S7*irot_input_y ;
temp2=DOROUND(temp2);
temp2>>=16;
op[7*8] = (int16_t) (temp1 + temp2);
/* Define inputs to rotation for outputs 3 and 5 */
irot_input_x = id07 - icommon_product1;
irot_input_y = id34 - icommon_product2;
/* Apply rotation for outputs 3 and 5. */
temp1=xC3S5*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC5S3*irot_input_y ;
temp2=DOROUND(temp2);
temp2>>=16;
op[3*8] = (int16_t) (temp1 - temp2) ;
temp1=xC5S3*irot_input_x;
temp1=DOROUND(temp1);
temp1>>=16;
temp2=xC3S5*irot_input_y;
temp2=DOROUND(temp2);
temp2>>=16;
op[5*8] = (int16_t) (temp1 + temp2);
/* Increment data pointer for next column. */
ip ++;
op ++;
}
}
OIL_DEFINE_IMPL_REF (fdct8x8theora_ref, fdct8x8theora);
#ifdef __SYMBIAN32__
OilFunctionClass* __oil_function_class_fdct8x8theora() {
return &_oil_function_class_fdct8x8theora;
}
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_fdct8x8theora_ref() {
return &_oil_function_impl_fdct8x8theora_ref;
}
#endif
#ifdef __SYMBIAN32__
EXPORT_C void** _oil_function_class_ptr_fdct8x8theora () {
oil_function_class_ptr_fdct8x8theora = __oil_function_class_fdct8x8theora();
return &oil_function_class_ptr_fdct8x8theora->func;
}
#endif