www.pudn.com > core.rar > pixel.c
/*****************************************************************************
* pixel.c: h264 encoder
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
* $Id: pixel.c,v 1.4 2004/03/09 12:27:13 titer Exp $
*
* Authors: Laurent Aimar
*
* 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, USA.
*****************************************************************************/
#include
#include
#include
#include "../x264.h"
#include "pixel.h"
#ifdef HAVE_MMXEXT
# include "i386/pixel.h"
#endif
#ifdef HAVE_ALTIVEC
# include "ppc/pixel.h"
#endif
/****************************************************************************
* pixel_sad_WxH
****************************************************************************/
#define PIXEL_SAD_C( name, lx, ly ) \
static int name( uint8_t *pix1, int i_stride_pix1, \
uint8_t *pix2, int i_stride_pix2 ) \
{ \
int i_sum = 0; \
int x, y; \
for( y = 0; y < ly; y++ ) \
{ \
for( x = 0; x < lx; x++ ) \
{ \
i_sum += abs( pix1[x] - pix2[x] ); \
} \
pix1 += i_stride_pix1; \
pix2 += i_stride_pix2; \
} \
return i_sum; \
}
PIXEL_SAD_C( pixel_sad_16x16, 16, 16 )
PIXEL_SAD_C( pixel_sad_16x8, 16, 8 )
PIXEL_SAD_C( pixel_sad_8x16, 8, 16 )
PIXEL_SAD_C( pixel_sad_8x8, 8, 8 )
PIXEL_SAD_C( pixel_sad_8x4, 8, 4 )
PIXEL_SAD_C( pixel_sad_4x8, 4, 8 )
PIXEL_SAD_C( pixel_sad_4x4, 4, 4 )
static void pixel_sub_4x4( int16_t diff[4][4], uint8_t *pix1, int i_pix1, uint8_t *pix2, int i_pix2 )
{
int y, x;
for( y = 0; y < 4; y++ )
{
for( x = 0; x < 4; x++ )
{
diff[y][x] = pix1[x] - pix2[x];
}
pix1 += i_pix1;
pix2 += i_pix2;
}
}
static void pixel_sub_8x8( int16_t diff[4][4][4], uint8_t *pix1, int i_pix1, uint8_t *pix2, int i_pix2 )
{
pixel_sub_4x4( diff[0], &pix1[0], i_pix1, &pix2[0], i_pix2 );
pixel_sub_4x4( diff[1], &pix1[4], i_pix1, &pix2[4], i_pix2 );
pixel_sub_4x4( diff[2], &pix1[4*i_pix1], i_pix1, &pix2[4*i_pix2], i_pix2 );
pixel_sub_4x4( diff[3], &pix1[4*i_pix1+4], i_pix1, &pix2[4*i_pix2+4], i_pix2 );
}
static void pixel_sub_16x16( int16_t diff[16][4][4], uint8_t *pix1, int i_pix1, uint8_t *pix2, int i_pix2 )
{
pixel_sub_8x8( &diff[ 0], &pix1[0], i_pix1, &pix2[0], i_pix2 );
pixel_sub_8x8( &diff[ 4], &pix1[8], i_pix1, &pix2[8], i_pix2 );
pixel_sub_8x8( &diff[ 8], &pix1[8*i_pix1], i_pix1, &pix2[8*i_pix2], i_pix2 );
pixel_sub_8x8( &diff[12], &pix1[8*i_pix1+8], i_pix1, &pix2[8*i_pix2+8], i_pix2 );
}
static void pixel_add_4x4( uint8_t *dst, int i_dst, int16_t diff[4][4] )
{
int x, y;
for( y = 0; y < 4; y++ )
{
for( x = 0; x < 4; x++ )
{
int pix;
pix = dst[x] + diff[y][x];
if( pix < 0 )
{
dst[x] = 0;
}
else if( pix > 255 )
{
dst[x] = 255;
}
else
{
dst[x] = pix;
}
}
dst += i_dst;
}
}
static void pixel_add_8x8( uint8_t *dst, int i_dst, int16_t diff[4][4][4] )
{
pixel_add_4x4( &dst[0], i_dst, diff[0] );
pixel_add_4x4( &dst[4], i_dst, diff[1] );
pixel_add_4x4( &dst[0+4*i_dst], i_dst, diff[2] );
pixel_add_4x4( &dst[4+4*i_dst], i_dst, diff[3] );
}
static void pixel_add_16x16( uint8_t *dst, int i_dst, int16_t diff[16][4][4] )
{
pixel_add_8x8( &dst[0], i_dst, &diff[ 0] );
pixel_add_8x8( &dst[8], i_dst, &diff[ 4] );
pixel_add_8x8( &dst[0+8*i_dst], i_dst, &diff[ 8] );
pixel_add_8x8( &dst[8+8*i_dst], i_dst, &diff[12] );
}
static int pixel_satd_wxh( uint8_t *pix1, int i_pix1, uint8_t *pix2, int i_pix2, int i_width, int i_height )
{
int16_t tmp[4][4];
int16_t diff[4][4];
int x, y;
int i_satd = 0;
for( y = 0; y < i_height; y += 4 )
{
for( x = 0; x < i_width; x += 4 )
{
int d;
pixel_sub_4x4( diff, &pix1[x], i_pix1, &pix2[x], i_pix2 );
for( d = 0; d < 4; d++ )
{
int s01, s23;
int d01, d23;
s01 = diff[d][0] + diff[d][1]; s23 = diff[d][2] + diff[d][3];
d01 = diff[d][0] - diff[d][1]; d23 = diff[d][2] - diff[d][3];
tmp[d][0] = s01 + s23;
tmp[d][1] = s01 - s23;
tmp[d][2] = d01 - d23;
tmp[d][3] = d01 + d23;
}
for( d = 0; d < 4; d++ )
{
int s01, s23;
int d01, d23;
s01 = tmp[0][d] + tmp[1][d]; s23 = tmp[2][d] + tmp[3][d];
d01 = tmp[0][d] - tmp[1][d]; d23 = tmp[2][d] - tmp[3][d];
i_satd += abs( s01 + s23 ) + abs( s01 - s23 ) + abs( d01 - d23 ) + abs( d01 + d23 );
}
}
pix1 += 4 * i_pix1;
pix2 += 4 * i_pix2;
}
return i_satd / 2;
}
#define PIXEL_SATD_C( name, width, height ) \
static int name( uint8_t *pix1, int i_stride_pix1, \
uint8_t *pix2, int i_stride_pix2 ) \
{ \
return pixel_satd_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, width, height ); \
}
PIXEL_SATD_C( pixel_satd_16x16, 16, 16 )
PIXEL_SATD_C( pixel_satd_16x8, 16, 8 )
PIXEL_SATD_C( pixel_satd_8x16, 8, 16 )
PIXEL_SATD_C( pixel_satd_8x8, 8, 8 )
PIXEL_SATD_C( pixel_satd_8x4, 8, 4 )
PIXEL_SATD_C( pixel_satd_4x8, 4, 8 )
PIXEL_SATD_C( pixel_satd_4x4, 4, 4 )
static inline void pixel_avg_wxh( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int width, int height )
{
int x, y;
for( y = 0; y < height; y++ )
{
for( x = 0; x < width; x++ )
{
dst[x] = ( dst[x] + src[x] + 1 ) >> 1;
}
dst += i_dst;
src += i_src;
}
}
#define PIXEL_AVG_C( name, width, height ) \
static void name( uint8_t *pix1, int i_stride_pix1, \
uint8_t *pix2, int i_stride_pix2 ) \
{ \
pixel_avg_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, width, height ); \
}
PIXEL_AVG_C( pixel_avg_16x16, 16, 16 )
PIXEL_AVG_C( pixel_avg_16x8, 16, 8 )
PIXEL_AVG_C( pixel_avg_8x16, 8, 16 )
PIXEL_AVG_C( pixel_avg_8x8, 8, 8 )
PIXEL_AVG_C( pixel_avg_8x4, 8, 4 )
PIXEL_AVG_C( pixel_avg_4x8, 4, 8 )
PIXEL_AVG_C( pixel_avg_4x4, 4, 4 )
/****************************************************************************
* x264_pixel_init:
****************************************************************************/
void x264_pixel_init( int cpu, x264_pixel_function_t *pixf )
{
pixf->sad[PIXEL_16x16] = pixel_sad_16x16;
pixf->sad[PIXEL_16x8] = pixel_sad_16x8;
pixf->sad[PIXEL_8x16] = pixel_sad_8x16;
pixf->sad[PIXEL_8x8] = pixel_sad_8x8;
pixf->sad[PIXEL_8x4] = pixel_sad_8x4;
pixf->sad[PIXEL_4x8] = pixel_sad_4x8;
pixf->sad[PIXEL_4x4] = pixel_sad_4x4;
pixf->satd[PIXEL_16x16]= pixel_satd_16x16;
pixf->satd[PIXEL_16x8] = pixel_satd_16x8;
pixf->satd[PIXEL_8x16] = pixel_satd_8x16;
pixf->satd[PIXEL_8x8] = pixel_satd_8x8;
pixf->satd[PIXEL_8x4] = pixel_satd_8x4;
pixf->satd[PIXEL_4x8] = pixel_satd_4x8;
pixf->satd[PIXEL_4x4] = pixel_satd_4x4;
pixf->avg[PIXEL_16x16]= pixel_avg_16x16;
pixf->avg[PIXEL_16x8] = pixel_avg_16x8;
pixf->avg[PIXEL_8x16] = pixel_avg_8x16;
pixf->avg[PIXEL_8x8] = pixel_avg_8x8;
pixf->avg[PIXEL_8x4] = pixel_avg_8x4;
pixf->avg[PIXEL_4x8] = pixel_avg_4x8;
pixf->avg[PIXEL_4x4] = pixel_avg_4x4;
pixf->sub4x4 = pixel_sub_4x4;
pixf->sub8x8 = pixel_sub_8x8;
pixf->sub16x16 = pixel_sub_16x16;
pixf->add4x4 = pixel_add_4x4;
pixf->add8x8 = pixel_add_8x8;
pixf->add16x16 = pixel_add_16x16;
#ifdef HAVE_MMXEXT
if( cpu&X264_CPU_MMXEXT )
{
x264_pixel_mmxext_init( pixf );
}
#endif
#ifdef HAVE_ALTIVEC
if( cpu&X264_CPU_ALTIVEC )
{
x264_pixel_altivec_init( pixf );
}
#endif
}