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Commit 2107a4f7 authored by Loren Merritt's avatar Loren Merritt
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skip a few duplicate candidates in fullpel hex&umh search. 



git-svn-id: svn://svn.videolan.org/x264/trunk@357 df754926-b1dd-0310-bc7b-ec298dee348c
parent 01c05a79
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encoder/me.c
View file @ 2107a4f7
......@@ -44,7 +44,7 @@ static const int subpel_iterations[][4] =
static void refine_subpel( x264_t *h, x264_me_t *m, int hpel_iters, int qpel_iters, int *p_halfpel_thresh, int b_refine_qpel );
#define COST_MV( mx, my ) \
#define COST_MV_INT( mx, my, bd, d ) \
{ \
int cost = h->pixf.sad[i_pixel]( m->p_fenc[0], m->i_stride[0], \
&p_fref[(my)*m->i_stride[0]+(mx)], m->i_stride[0] ) \
......@@ -55,8 +55,22 @@ static void refine_subpel( x264_t *h, x264_me_t *m, int hpel_iters, int qpel_ite
bcost = cost; \
bmx = mx; \
bmy = my; \
if( bd ) \
dir = d; \
} \
}
#define COST_MV( mx, my ) COST_MV_INT( mx, my, 0, 0 )
#define COST_MV_DIR( mx, my, d ) COST_MV_INT( mx, my, 1, d )
#define DIA1_ITER( mx, my )\
{\
omx = mx; omy = my;\
COST_MV( omx , omy-1 );/* 1 */\
COST_MV( omx , omy+1 );/* 101 */\
COST_MV( omx-1, omy );/* 1 */\
COST_MV( omx+1, omy );\
}
void x264_me_search_ref( x264_t *h, x264_me_t *m, int (*mvc)[2], int i_mvc, int *p_halfpel_thresh )
{
......@@ -66,6 +80,7 @@ void x264_me_search_ref( x264_t *h, x264_me_t *m, int (*mvc)[2], int i_mvc, int
int omx, omy, pmx, pmy;
uint8_t *p_fref = m->p_fref[0];
int i, j;
int dir;
int mv_x_min = h->mb.mv_min_fpel[0];
int mv_y_min = h->mb.mv_min_fpel[1];
......@@ -109,16 +124,6 @@ void x264_me_search_ref( x264_t *h, x264_me_t *m, int (*mvc)[2], int i_mvc, int
{
case X264_ME_DIA:
/* diamond search, radius 1 */
#define DIA1_ITER(mx, my)\
{\
omx = mx;\
omy = my;\
COST_MV( omx , omy-1 );\
COST_MV( omx , omy+1 );\
COST_MV( omx-1, omy );\
COST_MV( omx+1, omy );\
}
for( i = 0; i < i_me_range; i++ )
{
DIA1_ITER( bmx, bmy );
......@@ -128,25 +133,47 @@ void x264_me_search_ref( x264_t *h, x264_me_t *m, int (*mvc)[2], int i_mvc, int
break;
case X264_ME_HEX:
me_hex2:
/* hexagon search, radius 2 */
#define HEX2_ITER(mx, my)\
{\
omx = mx;\
omy = my;\
COST_MV( omx-2, omy );\
COST_MV( omx-1, omy+2 );\
COST_MV( omx+1, omy+2 );\
COST_MV( omx+2, omy );\
COST_MV( omx+1, omy-2 );\
COST_MV( omx-1, omy-2 );\
}
#if 0
for( i = 0; i < i_me_range/2; i++ )
{
HEX2_ITER( bmx, bmy );
omx = bmx; omy = bmy;
COST_MV( omx-2, omy );
COST_MV( omx-1, omy+2 );
COST_MV( omx+1, omy+2 );
COST_MV( omx+2, omy );
COST_MV( omx+1, omy-2 );
COST_MV( omx-1, omy-2 );
if( bmx == omx && bmy == omy )
break;
}
#else
/* equivalent to the above, but eliminates duplicate candidates */
dir = -1;
omx = bmx; omy = bmy;
COST_MV_DIR( omx-2, omy, 0 );
COST_MV_DIR( omx-1, omy+2, 1 );
COST_MV_DIR( omx+1, omy+2, 2 );
COST_MV_DIR( omx+2, omy, 3 );
COST_MV_DIR( omx+1, omy-2, 4 );
COST_MV_DIR( omx-1, omy-2, 5 );
if( dir != -1 )
{
for( i = 1; i < i_me_range/2; i++ )
{
static const int hex2[8][2] = {{-1,-2}, {-2,0}, {-1,2}, {1,2}, {2,0}, {1,-2}, {-1,-2}, {-2,0}};
static const int mod6[8] = {5,0,1,2,3,4,5,0};
const int odir = mod6[dir+1];
omx = bmx; omy = bmy;
COST_MV_DIR( omx + hex2[odir+0][0], omy + hex2[odir+0][1], odir-1 );
COST_MV_DIR( omx + hex2[odir+1][0], omy + hex2[odir+1][1], odir );
COST_MV_DIR( omx + hex2[odir+2][0], omy + hex2[odir+2][1], odir+1 );
if( bmx == omx && bmy == omy )
break;
}
}
#endif
/* square refine */
DIA1_ITER( bmx, bmy );
COST_MV( omx-1, omy-1 );
......@@ -156,73 +183,79 @@ void x264_me_search_ref( x264_t *h, x264_me_t *m, int (*mvc)[2], int i_mvc, int
break;
case X264_ME_UMH:
/* Uneven-cross Multi-Hexagon-grid Search
* as in JM, except without early termination */
{
/* Uneven-cross Multi-Hexagon-grid Search
* as in JM, except without early termination */
DIA1_ITER( pmx, pmy );
if( pmx || pmy )
DIA1_ITER( 0, 0 );
DIA1_ITER( bmx, bmy );
int ucost;
int cross_start;
if(i_pixel == PIXEL_4x4)
goto umh_small_hex;
/* refine predictors */
DIA1_ITER( pmx, pmy );
if( pmx || pmy )
DIA1_ITER( 0, 0 );
/* cross */
omx = bmx; omy = bmy;
for( i = 1; i < i_me_range; i+=2 )
{
if( omx + i <= mv_x_max )
COST_MV( omx + i, omy );
if( omx - i >= mv_x_min )
COST_MV( omx - i, omy );
}
for( i = 1; i < i_me_range/2; i+=2 )
{
if( omy + i <= mv_y_max )
COST_MV( omx, omy + i );
if( omy - i >= mv_y_min )
COST_MV( omx, omy - i );
}
if(i_pixel == PIXEL_4x4)
goto me_hex2;
/* 5x5 ESA */
omx = bmx; omy = bmy;
for( i = 0; i < 24; i++ )
{
static const int square2_x[24] = {1,1,0,-1,-1,-1, 0, 1, 2,2,2,2,1,0,-1,-2,-2,-2,-2,-2,-1, 0, 1, 2};
static const int square2_y[24] = {0,1,1, 1, 0,-1,-1,-1,-1,0,1,2,2,2, 2, 2, 1, 0,-1,-2,-2,-2,-2,-2};
COST_MV( omx + square2_x[i], omy + square2_y[i] );
}
/* hexagon grid */
omx = bmx; omy = bmy;
for( i = 1; i <= i_me_range/4; i++ )
{
int bounds_check = 4*i > X264_MIN4( mv_x_max-omx, mv_y_max-omy, omx-mv_x_min, omy-mv_y_min );
for( j = 0; j < 16; j++ )
ucost = bcost;
if( (bmx || bmy) && (bmx!=pmx || bmy!=pmy) )
DIA1_ITER( bmx, bmy );
/* cross */
omx = bmx; omy = bmy;
cross_start = ( bcost == ucost ) ? 3 : 1;
for( i = cross_start; i < i_me_range; i+=2 )
{
static const int hex4_x[16] = {0,-2,-4,-4,-4,-4,-4,-2, 0, 2, 4, 4,4,4,4,2};
static const int hex4_y[16] = {4, 3, 2, 1, 0,-1,-2,-3,-4,-3,-2,-1,0,1,2,3};
int mx = omx + hex4_x[j]*i;
int my = omy + hex4_y[j]*i;
if( !bounds_check || ( mx >= mv_x_min && mx <= mv_x_max
&& my >= mv_y_min && my <= mv_y_max ) )
COST_MV( mx, my );
if( omx + i <= mv_x_max )
COST_MV( omx + i, omy );
if( omx - i >= mv_x_min )
COST_MV( omx - i, omy );
}
for( i = cross_start; i < i_me_range/2; i+=2 )
{
if( omy + i <= mv_y_max )
COST_MV( omx, omy + i );
if( omy - i >= mv_y_min )
COST_MV( omx, omy - i );
}
/* 5x5 ESA */
omx = bmx; omy = bmy;
for( i = (bcost == ucost) ? 4 : 0; i < 24; i++ )
{
static const int square2[24][2] = {
{ 1, 0}, { 0, 1}, {-1, 0}, { 0,-1},
{ 1, 1}, {-1, 1}, {-1,-1}, { 1,-1},
{ 2,-1}, { 2, 0}, { 2, 1}, { 2, 2},
{ 1, 2}, { 0, 2}, {-1, 2}, {-2, 2},
{-2, 1}, {-2, 0}, {-2,-1}, {-2,-2},
{-1,-2}, { 0,-2}, { 1,-2}, { 2,-2}
};
COST_MV( omx + square2[i][0], omy + square2[i][1] );
}
/* hexagon grid */
omx = bmx; omy = bmy;
for( i = 1; i <= i_me_range/4; i++ )
{
int bounds_check = 4*i > X264_MIN4( mv_x_max-omx, mv_y_max-omy, omx-mv_x_min, omy-mv_y_min );
for( j = 0; j < 16; j++ )
{
static const int hex4[16][2] = {
{-4, 2}, {-4, 1}, {-4, 0}, {-4,-1}, {-4,-2},
{ 4,-2}, { 4,-1}, { 4, 0}, { 4, 1}, { 4, 2},
{ 2, 3}, { 0, 4}, {-2, 3},
{-2,-3}, { 0,-4}, { 2,-3},
};
int mx = omx + hex4[j][0]*i;
int my = omy + hex4[j][1]*i;
if( !bounds_check || ( mx >= mv_x_min && mx <= mv_x_max
&& my >= mv_y_min && my <= mv_y_max ) )
COST_MV( mx, my );
}
}
goto me_hex2;
}
umh_small_hex:
/* iterative search */
for( i = 0; i < i_me_range; i++ )
{
HEX2_ITER( bmx, bmy );
if( bmx == omx && bmy == omy )
break;
}
for( i = 0; i < i_me_range; i++ )
{
DIA1_ITER( bmx, bmy );
if( bmx == omx && bmy == omy )
break;
}
break;
case X264_ME_ESA:
{
......
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