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x264/common/mvpred.c

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/*****************************************************************************
* mvpred.c: motion vector prediction
*****************************************************************************
* Copyright (C) 2003-2024 x264 project
*
* Authors: Loren Merritt <lorenm@u.washington.edu>
* Fiona Glaser <fiona@x264.com>
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at licensing@x264.com.
*****************************************************************************/
#include "common.h"
void x264_mb_predict_mv( x264_t *h, int i_list, int idx, int i_width, int16_t mvp[2] )
{
const int i8 = x264_scan8[idx];
const int i_ref= h->mb.cache.ref[i_list][i8];
int i_refa = h->mb.cache.ref[i_list][i8 - 1];
int16_t *mv_a = h->mb.cache.mv[i_list][i8 - 1];
int i_refb = h->mb.cache.ref[i_list][i8 - 8];
int16_t *mv_b = h->mb.cache.mv[i_list][i8 - 8];
int i_refc = h->mb.cache.ref[i_list][i8 - 8 + i_width];
int16_t *mv_c = h->mb.cache.mv[i_list][i8 - 8 + i_width];
// Partitions not yet reached in scan order are unavailable.
if( (idx&3) >= 2 + (i_width&1) || i_refc == -2 )
{
i_refc = h->mb.cache.ref[i_list][i8 - 8 - 1];
mv_c = h->mb.cache.mv[i_list][i8 - 8 - 1];
if( SLICE_MBAFF
&& h->mb.cache.ref[i_list][x264_scan8[0]-1] != -2
&& MB_INTERLACED != h->mb.field[h->mb.i_mb_left_xy[0]] )
{
if( idx == 2 )
{
mv_c = h->mb.cache.topright_mv[i_list][0];
i_refc = h->mb.cache.topright_ref[i_list][0];
}
else if( idx == 8 )
{
mv_c = h->mb.cache.topright_mv[i_list][1];
i_refc = h->mb.cache.topright_ref[i_list][1];
}
else if( idx == 10 )
{
mv_c = h->mb.cache.topright_mv[i_list][2];
i_refc = h->mb.cache.topright_ref[i_list][2];
}
}
}
if( h->mb.i_partition == D_16x8 )
{
if( idx == 0 )
{
if( i_refb == i_ref )
{
CP32( mvp, mv_b );
return;
}
}
else
{
if( i_refa == i_ref )
{
CP32( mvp, mv_a );
return;
}
}
}
else if( h->mb.i_partition == D_8x16 )
{
if( idx == 0 )
{
if( i_refa == i_ref )
{
CP32( mvp, mv_a );
return;
}
}
else
{
if( i_refc == i_ref )
{
CP32( mvp, mv_c );
return;
}
}
}
int i_count = (i_refa == i_ref) + (i_refb == i_ref) + (i_refc == i_ref);
if( i_count > 1 )
{
median:
x264_median_mv( mvp, mv_a, mv_b, mv_c );
}
else if( i_count == 1 )
{
if( i_refa == i_ref )
CP32( mvp, mv_a );
else if( i_refb == i_ref )
CP32( mvp, mv_b );
else
CP32( mvp, mv_c );
}
else if( i_refb == -2 && i_refc == -2 && i_refa != -2 )
CP32( mvp, mv_a );
else
goto median;
}
void x264_mb_predict_mv_16x16( x264_t *h, int i_list, int i_ref, int16_t mvp[2] )
{
int i_refa = h->mb.cache.ref[i_list][X264_SCAN8_0 - 1];
int16_t *mv_a = h->mb.cache.mv[i_list][X264_SCAN8_0 - 1];
int i_refb = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8];
int16_t *mv_b = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8];
int i_refc = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8 + 4];
int16_t *mv_c = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8 + 4];
if( i_refc == -2 )
{
i_refc = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8 - 1];
mv_c = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8 - 1];
}
int i_count = (i_refa == i_ref) + (i_refb == i_ref) + (i_refc == i_ref);
if( i_count > 1 )
{
median:
x264_median_mv( mvp, mv_a, mv_b, mv_c );
}
else if( i_count == 1 )
{
if( i_refa == i_ref )
CP32( mvp, mv_a );
else if( i_refb == i_ref )
CP32( mvp, mv_b );
else
CP32( mvp, mv_c );
}
else if( i_refb == -2 && i_refc == -2 && i_refa != -2 )
CP32( mvp, mv_a );
else
goto median;
}
void x264_mb_predict_mv_pskip( x264_t *h, int16_t mv[2] )
{
int i_refa = h->mb.cache.ref[0][X264_SCAN8_0 - 1];
int i_refb = h->mb.cache.ref[0][X264_SCAN8_0 - 8];
int16_t *mv_a = h->mb.cache.mv[0][X264_SCAN8_0 - 1];
int16_t *mv_b = h->mb.cache.mv[0][X264_SCAN8_0 - 8];
if( i_refa == -2 || i_refb == -2 ||
!( (uint32_t)i_refa | M32( mv_a ) ) ||
!( (uint32_t)i_refb | M32( mv_b ) ) )
{
M32( mv ) = 0;
}
else
x264_mb_predict_mv_16x16( h, 0, 0, mv );
}
static int mb_predict_mv_direct16x16_temporal( x264_t *h )
{
int mb_x = h->mb.i_mb_x;
int mb_y = h->mb.i_mb_y;
int mb_xy = h->mb.i_mb_xy;
int type_col[2] = { h->fref[1][0]->mb_type[mb_xy], h->fref[1][0]->mb_type[mb_xy] };
int partition_col[2] = { h->fref[1][0]->mb_partition[mb_xy], h->fref[1][0]->mb_partition[mb_xy] };
int preshift = MB_INTERLACED;
int postshift = MB_INTERLACED;
int offset = 1;
int yshift = 1;
h->mb.i_partition = partition_col[0];
if( PARAM_INTERLACED && h->fref[1][0]->field[mb_xy] != MB_INTERLACED )
{
if( MB_INTERLACED )
{
mb_y = h->mb.i_mb_y&~1;
mb_xy = mb_x + h->mb.i_mb_stride * mb_y;
type_col[0] = h->fref[1][0]->mb_type[mb_xy];
type_col[1] = h->fref[1][0]->mb_type[mb_xy + h->mb.i_mb_stride];
partition_col[0] = h->fref[1][0]->mb_partition[mb_xy];
partition_col[1] = h->fref[1][0]->mb_partition[mb_xy + h->mb.i_mb_stride];
preshift = 0;
yshift = 0;
if( (IS_INTRA(type_col[0]) || partition_col[0] == D_16x16) &&
(IS_INTRA(type_col[1]) || partition_col[1] == D_16x16) &&
partition_col[0] != D_8x8 )
h->mb.i_partition = D_16x8;
else
h->mb.i_partition = D_8x8;
}
else
{
int cur_poc = h->fdec->i_poc + h->fdec->i_delta_poc[MB_INTERLACED&h->mb.i_mb_y&1];
int col_parity = abs(h->fref[1][0]->i_poc + h->fref[1][0]->i_delta_poc[0] - cur_poc)
>= abs(h->fref[1][0]->i_poc + h->fref[1][0]->i_delta_poc[1] - cur_poc);
mb_y = (h->mb.i_mb_y&~1) + col_parity;
mb_xy = mb_x + h->mb.i_mb_stride * mb_y;
type_col[0] = type_col[1] = h->fref[1][0]->mb_type[mb_xy];
partition_col[0] = partition_col[1] = h->fref[1][0]->mb_partition[mb_xy];
preshift = 1;
yshift = 2;
h->mb.i_partition = partition_col[0];
}
offset = 0;
}
int i_mb_4x4 = 16 * h->mb.i_mb_stride * mb_y + 4 * mb_x;
int i_mb_8x8 = 4 * h->mb.i_mb_stride * mb_y + 2 * mb_x;
x264_macroblock_cache_ref( h, 0, 0, 4, 4, 1, 0 );
/* Don't do any checks other than the ones we have to, based
* on the size of the colocated partitions.
* Depends on the enum order: D_8x8, D_16x8, D_8x16, D_16x16 */
int max_i8 = (D_16x16 - h->mb.i_partition) + 1;
int step = (h->mb.i_partition == D_16x8) + 1;
int width = 4 >> ((D_16x16 - h->mb.i_partition)&1);
int height = 4 >> ((D_16x16 - h->mb.i_partition)>>1);
for( int i8 = 0; i8 < max_i8; i8 += step )
{
int x8 = i8&1;
int y8 = i8>>1;
int ypart = (SLICE_MBAFF && h->fref[1][0]->field[mb_xy] != MB_INTERLACED) ?
MB_INTERLACED ? y8*6 : 2*(h->mb.i_mb_y&1) + y8 :
3*y8;
if( IS_INTRA( type_col[y8] ) )
{
x264_macroblock_cache_ref( h, 2*x8, 2*y8, width, height, 0, 0 );
x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 0, 0 );
x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 1, 0 );
continue;
}
int i_part_8x8 = i_mb_8x8 + x8 + (ypart>>1) * h->mb.i_b8_stride;
int i_ref1_ref = h->fref[1][0]->ref[0][i_part_8x8];
int i_ref = (map_col_to_list0(i_ref1_ref>>preshift) * (1 << postshift)) + (offset&i_ref1_ref&MB_INTERLACED);
if( i_ref >= 0 )
{
int dist_scale_factor = h->mb.dist_scale_factor[i_ref][0];
int16_t *mv_col = h->fref[1][0]->mv[0][i_mb_4x4 + 3*x8 + ypart * h->mb.i_b4_stride];
int16_t mv_y = (mv_col[1] * (1 << yshift)) / 2;
int l0x = ( dist_scale_factor * mv_col[0] + 128 ) >> 8;
int l0y = ( dist_scale_factor * mv_y + 128 ) >> 8;
if( h->param.i_threads > 1 && (l0y > h->mb.mv_max_spel[1] || l0y-mv_y > h->mb.mv_max_spel[1]) )
return 0;
x264_macroblock_cache_ref( h, 2*x8, 2*y8, width, height, 0, i_ref );
x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 0, pack16to32_mask(l0x, l0y) );
x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 1, pack16to32_mask(l0x-mv_col[0], l0y-mv_y) );
}
else
{
/* the collocated ref isn't in the current list0 */
/* FIXME: we might still be able to use direct_8x8 on some partitions */
/* FIXME: with B-pyramid + extensive ref list reordering
* (not currently used), we would also have to check
* l1mv1 like in spatial mode */
return 0;
}
}
return 1;
}
static ALWAYS_INLINE int mb_predict_mv_direct16x16_spatial( x264_t *h, int b_interlaced )
{
int8_t ref[2];
ALIGNED_ARRAY_8( int16_t, mv,[2],[2] );
for( int i_list = 0; i_list < 2; i_list++ )
{
int i_refa = h->mb.cache.ref[i_list][X264_SCAN8_0 - 1];
int16_t *mv_a = h->mb.cache.mv[i_list][X264_SCAN8_0 - 1];
int i_refb = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8];
int16_t *mv_b = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8];
int i_refc = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8 + 4];
int16_t *mv_c = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8 + 4];
if( i_refc == -2 )
{
i_refc = h->mb.cache.ref[i_list][X264_SCAN8_0 - 8 - 1];
mv_c = h->mb.cache.mv[i_list][X264_SCAN8_0 - 8 - 1];
}
int i_ref = (int)X264_MIN3( (unsigned)i_refa, (unsigned)i_refb, (unsigned)i_refc );
if( i_ref < 0 )
{
i_ref = -1;
M32( mv[i_list] ) = 0;
}
else
{
/* Same as x264_mb_predict_mv_16x16, but simplified to eliminate cases
* not relevant to spatial direct. */
int i_count = (i_refa == i_ref) + (i_refb == i_ref) + (i_refc == i_ref);
if( i_count > 1 )
x264_median_mv( mv[i_list], mv_a, mv_b, mv_c );
else
{
if( i_refa == i_ref )
CP32( mv[i_list], mv_a );
else if( i_refb == i_ref )
CP32( mv[i_list], mv_b );
else
CP32( mv[i_list], mv_c );
}
}
x264_macroblock_cache_ref( h, 0, 0, 4, 4, i_list, i_ref );
x264_macroblock_cache_mv_ptr( h, 0, 0, 4, 4, i_list, mv[i_list] );
ref[i_list] = i_ref;
}
int mb_x = h->mb.i_mb_x;
int mb_y = h->mb.i_mb_y;
int mb_xy = h->mb.i_mb_xy;
int type_col[2] = { h->fref[1][0]->mb_type[mb_xy], h->fref[1][0]->mb_type[mb_xy] };
int partition_col[2] = { h->fref[1][0]->mb_partition[mb_xy], h->fref[1][0]->mb_partition[mb_xy] };
h->mb.i_partition = partition_col[0];
if( b_interlaced && h->fref[1][0]->field[mb_xy] != MB_INTERLACED )
{
if( MB_INTERLACED )
{
mb_y = h->mb.i_mb_y&~1;
mb_xy = mb_x + h->mb.i_mb_stride * mb_y;
type_col[0] = h->fref[1][0]->mb_type[mb_xy];
type_col[1] = h->fref[1][0]->mb_type[mb_xy + h->mb.i_mb_stride];
partition_col[0] = h->fref[1][0]->mb_partition[mb_xy];
partition_col[1] = h->fref[1][0]->mb_partition[mb_xy + h->mb.i_mb_stride];
if( (IS_INTRA(type_col[0]) || partition_col[0] == D_16x16) &&
(IS_INTRA(type_col[1]) || partition_col[1] == D_16x16) &&
partition_col[0] != D_8x8 )
h->mb.i_partition = D_16x8;
else
h->mb.i_partition = D_8x8;
}
else
{
int cur_poc = h->fdec->i_poc + h->fdec->i_delta_poc[MB_INTERLACED&h->mb.i_mb_y&1];
int col_parity = abs(h->fref[1][0]->i_poc + h->fref[1][0]->i_delta_poc[0] - cur_poc)
>= abs(h->fref[1][0]->i_poc + h->fref[1][0]->i_delta_poc[1] - cur_poc);
mb_y = (h->mb.i_mb_y&~1) + col_parity;
mb_xy = mb_x + h->mb.i_mb_stride * mb_y;
type_col[0] = type_col[1] = h->fref[1][0]->mb_type[mb_xy];
partition_col[0] = partition_col[1] = h->fref[1][0]->mb_partition[mb_xy];
h->mb.i_partition = partition_col[0];
}
}
int i_mb_4x4 = b_interlaced ? 4 * (h->mb.i_b4_stride*mb_y + mb_x) : h->mb.i_b4_xy;
int i_mb_8x8 = b_interlaced ? 2 * (h->mb.i_b8_stride*mb_y + mb_x) : h->mb.i_b8_xy;
int8_t *l1ref0 = &h->fref[1][0]->ref[0][i_mb_8x8];
int8_t *l1ref1 = &h->fref[1][0]->ref[1][i_mb_8x8];
int16_t (*l1mv[2])[2] = { (int16_t (*)[2]) &h->fref[1][0]->mv[0][i_mb_4x4],
(int16_t (*)[2]) &h->fref[1][0]->mv[1][i_mb_4x4] };
if( (M16( ref ) & 0x8080) == 0x8080 ) /* if( ref[0] < 0 && ref[1] < 0 ) */
{
x264_macroblock_cache_ref( h, 0, 0, 4, 4, 0, 0 );
x264_macroblock_cache_ref( h, 0, 0, 4, 4, 1, 0 );
return 1;
}
if( h->param.i_threads > 1
&& ( mv[0][1] > h->mb.mv_max_spel[1]
|| mv[1][1] > h->mb.mv_max_spel[1] ) )
{
#if 0
fprintf(stderr, "direct_spatial: (%d,%d) (%d,%d) > %d \n",
mv[0][0], mv[0][1], mv[1][0], mv[1][1],
h->mb.mv_max_spel[1]);
#endif
return 0;
}
if( !M64( mv ) || (!b_interlaced && IS_INTRA( type_col[0] )) || (ref[0]&&ref[1]) )
return 1;
/* Don't do any checks other than the ones we have to, based
* on the size of the colocated partitions.
* Depends on the enum order: D_8x8, D_16x8, D_8x16, D_16x16 */
int max_i8 = (D_16x16 - h->mb.i_partition) + 1;
int step = (h->mb.i_partition == D_16x8) + 1;
int width = 4 >> ((D_16x16 - h->mb.i_partition)&1);
int height = 4 >> ((D_16x16 - h->mb.i_partition)>>1);
/* col_zero_flag */
for( int i8 = 0; i8 < max_i8; i8 += step )
{
const int x8 = i8&1;
const int y8 = i8>>1;
int ypart = (b_interlaced && h->fref[1][0]->field[mb_xy] != MB_INTERLACED) ?
MB_INTERLACED ? y8*6 : 2*(h->mb.i_mb_y&1) + y8 :
3*y8;
int o8 = x8 + (ypart>>1) * h->mb.i_b8_stride;
int o4 = 3*x8 + ypart * h->mb.i_b4_stride;
if( b_interlaced && IS_INTRA( type_col[y8] ) )
continue;
int idx;
if( l1ref0[o8] == 0 )
idx = 0;
else if( l1ref0[o8] < 0 && l1ref1[o8] == 0 )
idx = 1;
else
continue;
if( abs( l1mv[idx][o4][0] ) <= 1 && abs( l1mv[idx][o4][1] ) <= 1 )
{
if( ref[0] == 0 ) x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 0, 0 );
if( ref[1] == 0 ) x264_macroblock_cache_mv( h, 2*x8, 2*y8, width, height, 1, 0 );
}
}
return 1;
}
static int mb_predict_mv_direct16x16_spatial_interlaced( x264_t *h )
{
return mb_predict_mv_direct16x16_spatial( h, 1 );
}
static int mb_predict_mv_direct16x16_spatial_progressive( x264_t *h )
{
return mb_predict_mv_direct16x16_spatial( h, 0 );
}
int x264_mb_predict_mv_direct16x16( x264_t *h, int *b_changed )
{
int b_available;
if( h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_NONE )
return 0;
else if( h->sh.b_direct_spatial_mv_pred )
{
if( SLICE_MBAFF )
b_available = mb_predict_mv_direct16x16_spatial_interlaced( h );
else
b_available = mb_predict_mv_direct16x16_spatial_progressive( h );
}
else
b_available = mb_predict_mv_direct16x16_temporal( h );
if( b_changed != NULL && b_available )
{
int changed;
changed = (int)(M32( h->mb.cache.direct_mv[0][0] ) ^ M32( h->mb.cache.mv[0][x264_scan8[0]] ));
changed |= (int)(M32( h->mb.cache.direct_mv[1][0] ) ^ M32( h->mb.cache.mv[1][x264_scan8[0]] ));
changed |= h->mb.cache.direct_ref[0][0] ^ h->mb.cache.ref[0][x264_scan8[0]];
changed |= h->mb.cache.direct_ref[1][0] ^ h->mb.cache.ref[1][x264_scan8[0]];
if( !changed && h->mb.i_partition != D_16x16 )
{
changed |= (int)(M32( h->mb.cache.direct_mv[0][3] ) ^ M32( h->mb.cache.mv[0][x264_scan8[12]] ));
changed |= (int)(M32( h->mb.cache.direct_mv[1][3] ) ^ M32( h->mb.cache.mv[1][x264_scan8[12]] ));
changed |= h->mb.cache.direct_ref[0][3] ^ h->mb.cache.ref[0][x264_scan8[12]];
changed |= h->mb.cache.direct_ref[1][3] ^ h->mb.cache.ref[1][x264_scan8[12]];
}
if( !changed && h->mb.i_partition == D_8x8 )
{
changed |= (int)(M32( h->mb.cache.direct_mv[0][1] ) ^ M32( h->mb.cache.mv[0][x264_scan8[4]] ));
changed |= (int)(M32( h->mb.cache.direct_mv[1][1] ) ^ M32( h->mb.cache.mv[1][x264_scan8[4]] ));
changed |= (int)(M32( h->mb.cache.direct_mv[0][2] ) ^ M32( h->mb.cache.mv[0][x264_scan8[8]] ));
changed |= (int)(M32( h->mb.cache.direct_mv[1][2] ) ^ M32( h->mb.cache.mv[1][x264_scan8[8]] ));
changed |= h->mb.cache.direct_ref[0][1] ^ h->mb.cache.ref[0][x264_scan8[4]];
changed |= h->mb.cache.direct_ref[1][1] ^ h->mb.cache.ref[1][x264_scan8[4]];
changed |= h->mb.cache.direct_ref[0][2] ^ h->mb.cache.ref[0][x264_scan8[8]];
changed |= h->mb.cache.direct_ref[1][2] ^ h->mb.cache.ref[1][x264_scan8[8]];
}
*b_changed = changed;
if( !changed )
return b_available;
}
/* cache ref & mv */
if( b_available )
for( int l = 0; l < 2; l++ )
{
CP32( h->mb.cache.direct_mv[l][0], h->mb.cache.mv[l][x264_scan8[ 0]] );
CP32( h->mb.cache.direct_mv[l][1], h->mb.cache.mv[l][x264_scan8[ 4]] );
CP32( h->mb.cache.direct_mv[l][2], h->mb.cache.mv[l][x264_scan8[ 8]] );
CP32( h->mb.cache.direct_mv[l][3], h->mb.cache.mv[l][x264_scan8[12]] );
h->mb.cache.direct_ref[l][0] = h->mb.cache.ref[l][x264_scan8[ 0]];
h->mb.cache.direct_ref[l][1] = h->mb.cache.ref[l][x264_scan8[ 4]];
h->mb.cache.direct_ref[l][2] = h->mb.cache.ref[l][x264_scan8[ 8]];
h->mb.cache.direct_ref[l][3] = h->mb.cache.ref[l][x264_scan8[12]];
h->mb.cache.direct_partition = h->mb.i_partition;
}
return b_available;
}
/* This just improves encoder performance, it's not part of the spec */
void x264_mb_predict_mv_ref16x16( x264_t *h, int i_list, int i_ref, int16_t (*mvc)[2], int *i_mvc )
{
int16_t (*mvr)[2] = h->mb.mvr[i_list][i_ref];
int i = 0;
#define SET_MVP(mvp) \
{ \
CP32( mvc[i], mvp ); \
i++; \
}
#define SET_IMVP(xy) \
if( xy >= 0 ) \
{ \
int shift = 1 + MB_INTERLACED - h->mb.field[xy]; \
int16_t *mvp = h->mb.mvr[i_list][i_ref<<1>>shift][xy]; \
mvc[i][0] = mvp[0]; \
mvc[i][1] = mvp[1]*2>>shift; \
i++; \
}
/* b_direct */
if( h->sh.i_type == SLICE_TYPE_B
&& h->mb.cache.ref[i_list][x264_scan8[12]] == i_ref )
{
SET_MVP( h->mb.cache.mv[i_list][x264_scan8[12]] );
}
if( i_ref == 0 && h->frames.b_have_lowres )
{
int idx = i_list ? h->fref[1][0]->i_frame-h->fenc->i_frame-1
: h->fenc->i_frame-h->fref[0][0]->i_frame-1;
if( idx <= h->param.i_bframe )
{
int16_t (*lowres_mv)[2] = h->fenc->lowres_mvs[i_list][idx];
if( lowres_mv[0][0] != 0x7fff )
{
M32( mvc[i] ) = (M32( lowres_mv[h->mb.i_mb_xy] )*2)&0xfffeffff;
i++;
}
}
}
/* spatial predictors */
if( SLICE_MBAFF )
{
SET_IMVP( h->mb.i_mb_left_xy[0] );
SET_IMVP( h->mb.i_mb_top_xy );
SET_IMVP( h->mb.i_mb_topleft_xy );
SET_IMVP( h->mb.i_mb_topright_xy );
}
else
{
SET_MVP( mvr[h->mb.i_mb_left_xy[0]] );
SET_MVP( mvr[h->mb.i_mb_top_xy] );
SET_MVP( mvr[h->mb.i_mb_topleft_xy] );
SET_MVP( mvr[h->mb.i_mb_topright_xy] );
}
#undef SET_IMVP
#undef SET_MVP
/* temporal predictors */
if( h->fref[0][0]->i_ref[0] > 0 )
{
x264_frame_t *l0 = h->fref[0][0];
int field = h->mb.i_mb_y&1;
int curpoc = h->fdec->i_poc + h->fdec->i_delta_poc[field];
int refpoc = h->fref[i_list][i_ref>>SLICE_MBAFF]->i_poc;
refpoc += l0->i_delta_poc[field^(i_ref&1)];
#define SET_TMVP( dx, dy ) \
{ \
int mb_index = h->mb.i_mb_xy + dx + dy*h->mb.i_mb_stride; \
int scale = (curpoc - refpoc) * l0->inv_ref_poc[MB_INTERLACED&field]; \
mvc[i][0] = x264_clip3( (l0->mv16x16[mb_index][0]*scale + 128) >> 8, INT16_MIN, INT16_MAX ); \
mvc[i][1] = x264_clip3( (l0->mv16x16[mb_index][1]*scale + 128) >> 8, INT16_MIN, INT16_MAX ); \
i++; \
}
SET_TMVP(0,0);
if( h->mb.i_mb_x < h->mb.i_mb_width-1 )
SET_TMVP(1,0);
if( h->mb.i_mb_y < h->mb.i_mb_height-1 )
SET_TMVP(0,1);
#undef SET_TMVP
}
*i_mvc = i;
}
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