📄 interpolate8x8.c
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/*****************************************************************************
*
* XVID MPEG-4 VIDEO CODEC
* - 8x8 block-based halfpel interpolation -
*
* Copyright(C) 2001-2003 Peter Ross <pross@xvid.org>
*
* This program is free software ; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program ; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: interpolate8x8.c,v 1.15 2005/09/13 12:12:15 suxen_drol Exp $
*
****************************************************************************/
#include "../portab.h"
#include "../global.h"
#include "interpolate8x8.h"
/* function pointers */
INTERPOLATE8X8_PTR interpolate8x8_halfpel_h;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_v;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv;
INTERPOLATE8X8_PTR interpolate8x4_halfpel_h;
INTERPOLATE8X8_PTR interpolate8x4_halfpel_v;
INTERPOLATE8X8_PTR interpolate8x4_halfpel_hv;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_add;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_h_add;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_v_add;
INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv_add;
INTERPOLATE8X8_AVG2_PTR interpolate8x8_avg2;
INTERPOLATE8X8_AVG4_PTR interpolate8x8_avg4;
INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_h;
INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_v;
INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_h;
INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_v;
INTERPOLATE_LOWPASS_HV_PTR interpolate8x8_lowpass_hv;
INTERPOLATE_LOWPASS_HV_PTR interpolate16x16_lowpass_hv;
INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_h;
INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_v;
void
interpolate8x8_avg2_c(uint8_t * dst, const uint8_t * src1, const uint8_t *src2, const uint32_t stride, const uint32_t rounding, const uint32_t height)
{
uint32_t i;
const int32_t round = 1 - rounding;
for(i = 0; i < height; i++) {
dst[0] = (src1[0] + src2[0] + round) >> 1;
dst[1] = (src1[1] + src2[1] + round) >> 1;
dst[2] = (src1[2] + src2[2] + round) >> 1;
dst[3] = (src1[3] + src2[3] + round) >> 1;
dst[4] = (src1[4] + src2[4] + round) >> 1;
dst[5] = (src1[5] + src2[5] + round) >> 1;
dst[6] = (src1[6] + src2[6] + round) >> 1;
dst[7] = (src1[7] + src2[7] + round) >> 1;
dst += stride;
src1 += stride;
src2 += stride;
}
}
void
interpolate8x8_halfpel_add_c(uint8_t * const dst, const uint8_t * const src, const uint32_t stride, const uint32_t rounding)
{
interpolate8x8_avg2_c(dst, dst, src, stride, 0, 8);
}
void interpolate8x8_avg4_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, const uint8_t *src3, const uint8_t *src4, const uint32_t stride, const uint32_t rounding)
{
int32_t i;
const int32_t round = 2 - rounding;
for(i = 0; i < 8; i++) {
dst[0] = (src1[0] + src2[0] + src3[0] + src4[0] + round) >> 2;
dst[1] = (src1[1] + src2[1] + src3[1] + src4[1] + round) >> 2;
dst[2] = (src1[2] + src2[2] + src3[2] + src4[2] + round) >> 2;
dst[3] = (src1[3] + src2[3] + src3[3] + src4[3] + round) >> 2;
dst[4] = (src1[4] + src2[4] + src3[4] + src4[4] + round) >> 2;
dst[5] = (src1[5] + src2[5] + src3[5] + src4[5] + round) >> 2;
dst[6] = (src1[6] + src2[6] + src3[6] + src4[6] + round) >> 2;
dst[7] = (src1[7] + src2[7] + src3[7] + src4[7] + round) >> 2;
dst += stride;
src1 += stride;
src2 += stride;
src3 += stride;
src4 += stride;
}
}
/* dst = interpolate(src) */
void
interpolate8x8_halfpel_h_c(uint8_t * const dst,
const uint8_t * const src,
const uint32_t stride,
const uint32_t rounding)
{
uintptr_t j;
if (rounding) {
for (j = 0; j < 8*stride; j+=stride) {
dst[j + 0] = (uint8_t)((src[j + 0] + src[j + 1] )>>1);
dst[j + 1] = (uint8_t)((src[j + 1] + src[j + 2] )>>1);
dst[j + 2] = (uint8_t)((src[j + 2] + src[j + 3] )>>1);
dst[j + 3] = (uint8_t)((src[j + 3] + src[j + 4] )>>1);
dst[j + 4] = (uint8_t)((src[j + 4] + src[j + 5] )>>1);
dst[j + 5] = (uint8_t)((src[j + 5] + src[j + 6] )>>1);
dst[j + 6] = (uint8_t)((src[j + 6] + src[j + 7] )>>1);
dst[j + 7] = (uint8_t)((src[j + 7] + src[j + 8] )>>1);
}
} else {
for (j = 0; j < 8*stride; j+=stride) {
dst[j + 0] = (uint8_t)((src[j + 0] + src[j + 1] + 1)>>1);
dst[j + 1] = (uint8_t)((src[j + 1] + src[j + 2] + 1)>>1);
dst[j + 2] = (uint8_t)((src[j + 2] + src[j + 3] + 1)>>1);
dst[j + 3] = (uint8_t)((src[j + 3] + src[j + 4] + 1)>>1);
dst[j + 4] = (uint8_t)((src[j + 4] + src[j + 5] + 1)>>1);
dst[j + 5] = (uint8_t)((src[j + 5] + src[j + 6] + 1)>>1);
dst[j + 6] = (uint8_t)((src[j + 6] + src[j + 7] + 1)>>1);
dst[j + 7] = (uint8_t)((src[j + 7] + src[j + 8] + 1)>>1);
}
}
}
/* dst = interpolate(src) */
void
interpolate8x4_halfpel_h_c(uint8_t * const dst,
const uint8_t * const src,
const uint32_t stride,
const uint32_t rounding)
{
uintptr_t j;
if (rounding) {
for (j = 0; j < 4*stride; j+=stride) {
dst[j + 0] = (uint8_t)((src[j + 0] + src[j + 1] )>>1);
dst[j + 1] = (uint8_t)((src[j + 1] + src[j + 2] )>>1);
dst[j + 2] = (uint8_t)((src[j + 2] + src[j + 3] )>>1);
dst[j + 3] = (uint8_t)((src[j + 3] + src[j + 4] )>>1);
dst[j + 4] = (uint8_t)((src[j + 4] + src[j + 5] )>>1);
dst[j + 5] = (uint8_t)((src[j + 5] + src[j + 6] )>>1);
dst[j + 6] = (uint8_t)((src[j + 6] + src[j + 7] )>>1);
dst[j + 7] = (uint8_t)((src[j + 7] + src[j + 8] )>>1);
}
} else {
for (j = 0; j < 4*stride; j+=stride) {
dst[j + 0] = (uint8_t)((src[j + 0] + src[j + 1] + 1)>>1);
dst[j + 1] = (uint8_t)((src[j + 1] + src[j + 2] + 1)>>1);
dst[j + 2] = (uint8_t)((src[j + 2] + src[j + 3] + 1)>>1);
dst[j + 3] = (uint8_t)((src[j + 3] + src[j + 4] + 1)>>1);
dst[j + 4] = (uint8_t)((src[j + 4] + src[j + 5] + 1)>>1);
dst[j + 5] = (uint8_t)((src[j + 5] + src[j + 6] + 1)>>1);
dst[j + 6] = (uint8_t)((src[j + 6] + src[j + 7] + 1)>>1);
dst[j + 7] = (uint8_t)((src[j + 7] + src[j + 8] + 1)>>1);
}
}
}
/* dst = (dst + interpolate(src)/2 */
void
interpolate8x8_halfpel_h_add_c(uint8_t * const dst,
const uint8_t * const src,
const uint32_t stride,
const uint32_t rounding)
{
uintptr_t j;
if (rounding) {
for (j = 0; j < 8*stride; j+=stride) {
dst[j + 0] = (uint8_t)((((src[j + 0] + src[j + 1] )>>1) + dst[j+0] + 1)>>1);
dst[j + 1] = (uint8_t)((((src[j + 1] + src[j + 2] )>>1) + dst[j+1] + 1)>>1);
dst[j + 2] = (uint8_t)((((src[j + 2] + src[j + 3] )>>1) + dst[j+2] + 1)>>1);
dst[j + 3] = (uint8_t)((((src[j + 3] + src[j + 4] )>>1) + dst[j+3] + 1)>>1);
dst[j + 4] = (uint8_t)((((src[j + 4] + src[j + 5] )>>1) + dst[j+4] + 1)>>1);
dst[j + 5] = (uint8_t)((((src[j + 5] + src[j + 6] )>>1) + dst[j+5] + 1)>>1);
dst[j + 6] = (uint8_t)((((src[j + 6] + src[j + 7] )>>1) + dst[j+6] + 1)>>1);
dst[j + 7] = (uint8_t)((((src[j + 7] + src[j + 8] )>>1) + dst[j+7] + 1)>>1);
}
} else {
for (j = 0; j < 8*stride; j+=stride) {
dst[j + 0] = (uint8_t)((((src[j + 0] + src[j + 1] + 1)>>1) + dst[j+0] + 1)>>1);
dst[j + 1] = (uint8_t)((((src[j + 1] + src[j + 2] + 1)>>1) + dst[j+1] + 1)>>1);
dst[j + 2] = (uint8_t)((((src[j + 2] + src[j + 3] + 1)>>1) + dst[j+2] + 1)>>1);
dst[j + 3] = (uint8_t)((((src[j + 3] + src[j + 4] + 1)>>1) + dst[j+3] + 1)>>1);
dst[j + 4] = (uint8_t)((((src[j + 4] + src[j + 5] + 1)>>1) + dst[j+4] + 1)>>1);
dst[j + 5] = (uint8_t)((((src[j + 5] + src[j + 6] + 1)>>1) + dst[j+5] + 1)>>1);
dst[j + 6] = (uint8_t)((((src[j + 6] + src[j + 7] + 1)>>1) + dst[j+6] + 1)>>1);
dst[j + 7] = (uint8_t)((((src[j + 7] + src[j + 8] + 1)>>1) + dst[j+7] + 1)>>1);
}
}
}
/* dst = interpolate(src) */
void
interpolate8x8_halfpel_v_c(uint8_t * const dst,
const uint8_t * const src,
const uint32_t stride,
const uint32_t rounding)
{
uintptr_t j;
if (rounding) {
for (j = 0; j < 8*stride; j+=stride) {
dst[j + 0] = (uint8_t)((src[j + 0] + src[j + stride + 0] )>>1);
dst[j + 1] = (uint8_t)((src[j + 1] + src[j + stride + 1] )>>1);
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