X264_20060729.rar mc.c

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/*****************************************************************************
* mc.c: h264 encoder library (Motion Compensation)
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
* $Id: mc.c,v 1.1 2004/06/03 19:27:07 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* 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 <stdio.h>
#include <string.h>

#include "common.h"
#include "clip1.h"

#ifdef HAVE_MMXEXT
#include "i386/mc.h"
#endif
#ifdef ARCH_PPC
#include "ppc/mc.h"
#endif

static inline int x264_tapfilter( uint8_t *pix, int i_pix_next )
{
return pix[-2*i_pix_next] - 5*pix[-1*i_pix_next] + 20*(pix[0] + pix[1*i_pix_next]) - 5*pix[ 2*i_pix_next] + pix[ 3*i_pix_next];
}
static inline int x264_tapfilter1( uint8_t *pix )
{
return pix[-2] - 5*pix[-1] + 20*(pix[0] + pix[1]) - 5*pix[ 2] + pix[ 3];
}

static inline void pixel_avg( uint8_t *dst, int i_dst_stride,
uint8_t *src1, int i_src1_stride,
uint8_t *src2, int i_src2_stride,
int i_width, int i_height )
{
int x, y;
for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
}
dst += i_dst_stride;
src1 += i_src1_stride;
src2 += i_src2_stride;
}
}

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 )
PIXEL_AVG_C( pixel_avg_4x2, 4, 2 )
PIXEL_AVG_C( pixel_avg_2x4, 2, 4 )
PIXEL_AVG_C( pixel_avg_2x2, 2, 2 )

/* Implicit weighted bipred only:
* assumes log2_denom = 5, offset = 0, weight1 + weight2 = 64 */
#define op_scale2(x) dst[x] = x264_clip_uint8( (dst[x]*i_weight1 + src[x]*i_weight2 + (1<<5)) >> 6 )
static inline void pixel_avg_weight_wxh( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int width, int height, int i_weight1 ){
int y;
const int i_weight2 = 64 - i_weight1;
for(y=0; y<height; y++, dst += i_dst, src += i_src){
op_scale2(0);
op_scale2(1);
if(width==2) continue;
op_scale2(2);
op_scale2(3);
if(width==4) continue;
op_scale2(4);
op_scale2(5);
op_scale2(6);
op_scale2(7);
if(width==8) continue;
op_scale2(8);
op_scale2(9);
op_scale2(10);
op_scale2(11);
op_scale2(12);
op_scale2(13);
op_scale2(14);
op_scale2(15);
}
}

#define PIXEL_AVG_WEIGHT_C( width, height ) \
static void pixel_avg_weight_##width##x##height( \
uint8_t *pix1, int i_stride_pix1, \
uint8_t *pix2, int i_stride_pix2, int i_weight1 ) \
{ \
pixel_avg_weight_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, width, height, i_weight1 ); \
}

PIXEL_AVG_WEIGHT_C(16,16)
PIXEL_AVG_WEIGHT_C(16,8)
PIXEL_AVG_WEIGHT_C(8,16)
PIXEL_AVG_WEIGHT_C(8,8)
PIXEL_AVG_WEIGHT_C(8,4)
PIXEL_AVG_WEIGHT_C(4,8)
PIXEL_AVG_WEIGHT_C(4,4)
PIXEL_AVG_WEIGHT_C(4,2)
PIXEL_AVG_WEIGHT_C(2,4)
PIXEL_AVG_WEIGHT_C(2,2)
#undef op_scale2
#undef PIXEL_AVG_WEIGHT_C

typedef void (*pf_mc_t)(uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height );

static void mc_copy( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
{
int y;

for( y = 0; y < i_height; y++ )
{
memcpy( dst, src, i_width );

src += i_src_stride;
dst += i_dst_stride;
}
}
static inline void mc_hh( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
{
int x, y;

for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
dst[x] = x264_mc_clip1( ( x264_tapfilter1( &amt;src[x] ) + 16 ) >> 5 );
}
src += i_src_stride;
dst += i_dst_stride;
}
}
static inline void mc_hv( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
{
int x, y;

for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
dst[x] = x264_mc_clip1( ( x264_tapfilter( &amt;src[x], i_src_stride ) + 16 ) >> 5 );
}
src += i_src_stride;
dst += i_dst_stride;
}
}
static inline void mc_hc( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
{
uint8_t *out;
uint8_t *pix;
int x, y;

for( x = 0; x < i_width; x++ )
{
int tap[6];

pix = &amt;src[x];
out = &amt;dst[x];

tap[0] = x264_tapfilter1( &amt;pix[-2*i_src_stride] );
tap[1] = x264_tapfilter1( &amt;pix[-1*i_src_stride] );
tap[2] = x264_tapfilter1( &amt;pix[ 0*i_src_stride] );
tap[3] = x264_tapfilter1( &amt;pix[ 1*i_src_stride] );
tap[4] = x264_tapfilter1( &amt;pix[ 2*i_src_stride] );

for( y = 0; y < i_height; y++ )
{
tap[5] = x264_tapfilter1( &amt;pix[ 3*i_src_stride] );

*out = x264_mc_clip1( ( tap[0] - 5*tap[1] + 20 * tap[2] + 20 * tap[3] -5*tap[4] + tap[5] + 512 ) >> 10 );

/* Next line */
pix += i_src_stride;
out += i_dst_stride;
tap[0] = tap[1];
tap[1] = tap[2];
tap[2] = tap[3];
tap[3] = tap[4];
tap[4] = tap[5];
}
}
}

static const int hpel_ref0[16] = {0,1,1,1,0,1,1,1,2,3,3,3,0,1,1,1};
static const int hpel_ref1[16] = {0,0,0,0,2,2,3,2,2,2,3,2,2,2,3,2};

static void mc_luma( uint8_t *src[4], int i_src_stride,
uint8_t *dst, int i_dst_stride,
int mvx,int mvy,
int i_width, int i_height )
{
int qpel_idx = ((mvy&amt;3)<<2) + (mvx&amt;3);
int offset = (mvy>>2)*i_src_stride + (mvx>>2);
uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&amt;3) == 3) * i_src_stride;

if( qpel_idx &amt; 5 ) /* qpel interpolation needed */
{
uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&amt;3) == 3);

pixel_avg( dst, i_dst_stride, src1, i_src_stride,
src2, i_src_stride, i_width, i_height );
}
else
{
mc_copy( src1, i_src_stride, dst, i_dst_stride, i_width, i_height );
}
}

static uint8_t *get_ref( uint8_t *src[4], int i_src_stride,
uint8_t *dst, int * i_dst_stride,
int mvx,int mvy,
int i_width, int i_height )
{
int qpel_idx = ((mvy&amt;3)<<2) + (mvx&amt;3);
int offset = (mvy>>2)*i_src_stride + (mvx>>2);
uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&amt;3) == 3) * i_src_stride;

if( qpel_idx &amt; 5 ) /* qpel interpolation needed */
{
uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&amt;3) == 3);

pixel_avg( dst, *i_dst_stride, src1, i_src_stride,
src2, i_src_stride, i_width, i_height );

return dst;
}
else
{
*i_dst_stride = i_src_stride;
return src1;
}
}

/* full chroma mc (ie until 1/8 pixel)*/
static void motion_compensation_chroma( uint8_t *src, int i_src_stride,
uint8_t *dst, int i_dst_stride,
int mvx, int mvy,
int i_width, int i_height )
{
uint8_t *srcp;
int x, y;

const int d8x = mvx&amt;0x07;
const int d8y = mvy&amt;0x07;

const int cA = (8-d8x)*(8-d8y);
const int cB = d8x *(8-d8y);
const int cC = (8-d8x)*d8y;
const int cD = d8x *d8y;

src += (mvy >> 3) * i_src_stride + (mvx >> 3);
srcp = &amt;src[i_src_stride];

for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
dst[x] = ( cA*src[x] + cB*src[x+1] +
cC*srcp[x] + cD*srcp[x+1] + 32 ) >> 6;
}
dst += i_dst_stride;

src = srcp;
srcp += i_src_stride;
}
}

#define MC_COPY(W) \
static void mc_copy_w##W( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int i_height ) \
{ \
mc_copy( src, i_src, dst, i_dst, W, i_height ); \
}
MC_COPY( 16 )
MC_COPY( 8 )
MC_COPY( 4 )

void x264_mc_init( int cpu, x264_mc_functions_t *pf )
{
pf->mc_luma = mc_luma;
pf->get_ref = get_ref;
pf->mc_chroma = motion_compensation_chroma;

pf->avg[PIXEL_16x16]= pixel_avg_16x16;
pf->avg[PIXEL_16x8] = pixel_avg_16x8;
pf->avg[PIXEL_8x16] = pixel_avg_8x16;
pf->avg[PIXEL_8x8] = pixel_avg_8x8;
pf->avg[PIXEL_8x4] = pixel_avg_8x4;
pf->avg[PIXEL_4x8] = pixel_avg_4x8;
pf->avg[PIXEL_4x4] = pixel_avg_4x4;
pf->avg[PIXEL_4x2] = pixel_avg_4x2;
pf->avg[PIXEL_2x4] = pixel_avg_2x4;
pf->avg[PIXEL_2x2] = pixel_avg_2x2;

pf->avg_weight[PIXEL_16x16]= pixel_avg_weight_16x16;
pf->avg_weight[PIXEL_16x8] = pixel_avg_weight_16x8;
pf->avg_weight[PIXEL_8x16] = pixel_avg_weight_8x16;
pf->avg_weight[PIXEL_8x8] = pixel_avg_weight_8x8;
pf->avg_weight[PIXEL_8x4] = pixel_avg_weight_8x4;
pf->avg_weight[PIXEL_4x8] = pixel_avg_weight_4x8;
pf->avg_weight[PIXEL_4x4] = pixel_avg_weight_4x4;
pf->avg_weight[PIXEL_4x2] = pixel_avg_weight_4x2;
pf->avg_weight[PIXEL_2x4] = pixel_avg_weight_2x4;
pf->avg_weight[PIXEL_2x2] = pixel_avg_weight_2x2;

pf->copy[PIXEL_16x16] = mc_copy_w16;
pf->copy[PIXEL_8x8] = mc_copy_w8;
pf->copy[PIXEL_4x4] = mc_copy_w4;

#ifdef HAVE_MMXEXT
if( cpu&amt;X264_CPU_MMXEXT ) {
x264_mc_mmxext_init( pf );
pf->mc_chroma = x264_mc_chroma_mmxext;
}
#endif
#ifdef HAVE_SSE2
if( cpu&amt;X264_CPU_SSE2 )
x264_mc_sse2_init( pf );
#endif
#ifdef ARCH_PPC
if( cpu&amt;X264_CPU_ALTIVEC )
x264_mc_altivec_init( pf );
#endif
}

extern void x264_horizontal_filter_mmxext( uint8_t *dst, int i_dst_stride,
uint8_t *src, int i_src_stride,
int i_width, int i_height );
extern void x264_center_filter_mmxext( uint8_t *dst1, int i_dst1_stride,
uint8_t *dst2, int i_dst2_stride,
uint8_t *src, int i_src_stride,
int i_width, int i_height );

void x264_frame_filter( int cpu, x264_frame_t *frame )
{
const int x_inc = 16, y_inc = 16;
const int stride = frame->i_stride[0];
int x, y;

pf_mc_t int_h = mc_hh;
pf_mc_t int_v = mc_hv;
pf_mc_t int_hv = mc_hc;

#ifdef HAVE_MMXEXT
if ( cpu &amt; X264_CPU_MMXEXT )
{
x264_horizontal_filter_mmxext(frame->filtered[1] - 8 * stride - 8, stride,
frame->plane[0] - 8 * stride - 8, stride,
stride - 48, frame->i_lines[0] + 16);
x264_center_filter_mmxext(frame->filtered[2] - 8 * stride - 8, stride,
frame->filtered[3] - 8 * stride - 8, stride,
frame->plane[0] - 8 * stride - 8, stride,
stride - 48, frame->i_lines[0] + 16);
}
else
#endif
{
for( y = -8; y < frame->i_lines[0]+8; y += y_inc )
{
uint8_t *p_in = frame->plane[0] + y * stride - 8;
uint8_t *p_h = frame->filtered[1] + y * stride - 8;
uint8_t *p_v = frame->filtered[2] + y * stride - 8;
uint8_t *p_hv = frame->filtered[3] + y * stride - 8;
for( x = -8; x < stride - 64 + 8; x += x_inc )
{
int_h( p_in, stride, p_h, stride, x_inc, y_inc );
int_v( p_in, stride, p_v, stride, x_inc, y_inc );
int_hv( p_in, stride, p_hv, stride, x_inc, y_inc );

p_h += x_inc;
p_v += x_inc;
p_hv += x_inc;
p_in += x_inc;
}
}
}

/* generate integral image:
* each entry in frame->integral is the sum of all luma samples above and
* to the left of its location (inclusive).
* this allows us to calculate the DC of any rectangle by looking only
* at the corner entries.
* individual entries will overflow 16 bits, but that's ok:
* we only need the differences between entries, and those will be correct
* as long as we don't try to evaluate a rectangle bigger than 16x16.
* likewise, we don't really have to init the edges to 0, leaving garbage
* there wouldn't affect the results.*/

if( frame->integral )
{
memset( frame->integral - 32 * stride - 32, 0, stride * sizeof(uint16_t) );
for( y = -31; y < frame->i_lines[0] + 32; y++ )
{
uint8_t *ref = frame->plane[0] + y * stride - 32;
uint16_t *line = frame->integral + y * stride - 32;
uint16_t v = line[0] = 0;
for( x = 1; x < stride; x++ )
line[x] = v += ref[x] + line[x-stride] - line[x-stride-1];
}
}
}

void x264_frame_init_lowres( int cpu, x264_frame_t *frame )
{
// FIXME: tapfilter?
const int i_stride = frame->i_stride[0];
const int i_stride2 = frame->i_stride_lowres;
const int i_width2 = i_stride2 - 64;
int x, y, i;
for( y = 0; y < frame->i_lines_lowres - 1; y++ )
{
uint8_t *src0 = &amt;frame->plane[0][2*y*i_stride];
uint8_t *src1 = src0+i_stride;
uint8_t *src2 = src1+i_stride;
uint8_t *dst0 = &amt;frame->lowres[0][y*i_stride2];
uint8_t *dsth = &amt;frame->lowres[1][y*i_stride2];
uint8_t *dstv = &amt;frame->lowres[2][y*i_stride2];
uint8_t *dstc = &amt;frame->lowres[3][y*i_stride2];
for( x = 0; x < i_width2 - 1; x++ )
{
dst0[x] = (src0[2*x ] + src0[2*x+1] + src1[2*x ] + src1[2*x+1] + 2) >> 2;
dsth[x] = (src0[2*x+1] + src0[2*x+2] + src1[2*x+1] + src1[2*x+2] + 2) >> 2;
dstv[x] = (src1[2*x ] + src1[2*x+1] + src2[2*x ] + src2[2*x+1] + 2) >> 2;
dstc[x] = (src1[2*x+1] + src1[2*x+2] + src2[2*x+1] + src2[2*x+2] + 2) >> 2;
}
dst0[x] = (src0[2*x ] + src0[2*x+1] + src1[2*x ] + src1[2*x+1] + 2) >> 2;
dstv[x] = (src1[2*x ] + src1[2*x+1] + src2[2*x ] + src2[2*x+1] + 2) >> 2;
dsth[x] = (src0[2*x+1] + src1[2*x+1] + 1) >> 1;
dstc[x] = (src1[2*x+1] + src2[2*x+1] + 1) >> 1;
}
for( i = 0; i < 4; i++ )
memcpy( &amt;frame->lowres[i][y*i_stride2], &amt;frame->lowres[i][(y-1)*i_stride2], i_width2 );

for( y = 0; y < 16; y++ )
for( x = 0; x < 16; x++ )
frame->i_cost_est[x][y] = -1;

x264_frame_expand_border_lowres( frame );
}