-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];
-
- 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( 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 ||
- !( i_refa | M32( mv_a ) ) ||
- !( i_refb | M32( mv_b ) ) )
- {
- M32( mv ) = 0;
- }
- else
- {
- x264_mb_predict_mv_16x16( h, 0, 0, mv );
- }
-}
-
-static int x264_mb_predict_mv_direct16x16_temporal( x264_t *h )
-{
- int i_mb_4x4 = 16 * h->mb.i_mb_stride * h->mb.i_mb_y + 4 * h->mb.i_mb_x;
- int i_mb_8x8 = 4 * h->mb.i_mb_stride * h->mb.i_mb_y + 2 * h->mb.i_mb_x;
- int i8;
- const int type_col = h->fref1[0]->mb_type[h->mb.i_mb_xy];
- const int partition_col = h->fref1[0]->mb_partition[h->mb.i_mb_xy];
-
- x264_macroblock_cache_ref( h, 0, 0, 4, 4, 1, 0 );
-
- h->mb.i_partition = partition_col;
-
- if( IS_INTRA( type_col ) )
- {
- x264_macroblock_cache_ref( h, 0, 0, 4, 4, 0, 0 );
- x264_macroblock_cache_mv( h, 0, 0, 4, 4, 0, 0 );
- x264_macroblock_cache_mv( h, 0, 0, 4, 4, 1, 0 );
- 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 - partition_col) + 1;
- int step = (partition_col == D_16x8) + 1;
- int width = 4 >> ((D_16x16 - partition_col)&1);
- int height = 4 >> ((D_16x16 - partition_col)>>1);
-
- for( i8 = 0; i8 < max_i8; i8 += step )
- {
- const int x8 = i8%2;
- const int y8 = i8/2;
- const int i_part_8x8 = i_mb_8x8 + x8 + y8 * h->mb.i_b8_stride;
- const int i_ref1_ref = h->fref1[0]->ref[0][i_part_8x8];
- const int i_ref = (map_col_to_list0(i_ref1_ref>>h->sh.b_mbaff) << h->sh.b_mbaff) + (i_ref1_ref&h->sh.b_mbaff);
-
- if( i_ref >= 0 )
- {
- const int dist_scale_factor = h->mb.dist_scale_factor[i_ref][0];
- const int16_t *mv_col = h->fref1[0]->mv[0][i_mb_4x4 + 3*x8 + 3*y8 * h->mb.i_b4_stride];
- const int l0x = ( dist_scale_factor * mv_col[0] + 128 ) >> 8;
- const int l0y = ( dist_scale_factor * mv_col[1] + 128 ) >> 8;
- if( h->param.i_threads > 1 && (l0y > h->mb.mv_max_spel[1] || l0y-mv_col[1] > 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_col[1]) );
- }
- 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 int x264_mb_predict_mv_direct16x16_spatial( x264_t *h )
-{
- int8_t ref[2];
- ALIGNED_ARRAY_8( int16_t, mv,[2],[2] );
- int i_list, i8, i_ref;
- const int8_t *l1ref0 = &h->fref1[0]->ref[0][h->mb.i_b8_xy];
- const int8_t *l1ref1 = &h->fref1[0]->ref[1][h->mb.i_b8_xy];
- const int16_t (*l1mv[2])[2] = { (const int16_t (*)[2]) &h->fref1[0]->mv[0][h->mb.i_b4_xy],
- (const int16_t (*)[2]) &h->fref1[0]->mv[1][h->mb.i_b4_xy] };
- const int type_col = h->fref1[0]->mb_type[h->mb.i_mb_xy];
- const int partition_col = h->fref1[0]->mb_partition[h->mb.i_mb_xy];
-
- h->mb.i_partition = partition_col;
-
- for( 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];
- }
-
- i_ref = 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;
- }
-
- 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 ) || IS_INTRA( type_col ) || (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 - partition_col) + 1;
- int step = (partition_col == D_16x8) + 1;
- int width = 4 >> ((D_16x16 - partition_col)&1);
- int height = 4 >> ((D_16x16 - partition_col)>>1);
-
- /* col_zero_flag */
- for( i8 = 0; i8 < max_i8; i8 += step )
- {
- const int x8 = i8&1;
- const int y8 = i8>>1;
- const int o8 = x8 + y8 * h->mb.i_b8_stride;
- const int o4 = 3*(x8 + y8 * h->mb.i_b4_stride);
- 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;
-}
-
-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 )
- b_available = x264_mb_predict_mv_direct16x16_spatial( h );
- else
- b_available = x264_mb_predict_mv_direct16x16_temporal( h );
-
- if( b_changed != NULL && b_available )
- {
- int changed;
-
- changed = M32( h->mb.cache.direct_mv[0][0] ) ^ M32( h->mb.cache.mv[0][x264_scan8[0]] );
- changed |= 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 |= M32( h->mb.cache.direct_mv[0][3] ) ^ M32( h->mb.cache.mv[0][x264_scan8[12]] );
- changed |= 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 |= M32( h->mb.cache.direct_mv[0][1] ) ^ M32( h->mb.cache.mv[0][x264_scan8[4]] );
- changed |= M32( h->mb.cache.direct_mv[1][1] ) ^ M32( h->mb.cache.mv[1][x264_scan8[4]] );
- changed |= M32( h->mb.cache.direct_mv[0][2] ) ^ M32( h->mb.cache.mv[0][x264_scan8[8]] );
- changed |= 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 )
- {
- int l;
- for( 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[9][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++; \
- }
-
- /* 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 )
- {
- int16_t (*lowres_mv)[2] = i_list ? h->fenc->lowres_mvs[1][h->fref1[0]->i_frame-h->fenc->i_frame-1]
- : h->fenc->lowres_mvs[0][h->fenc->i_frame-h->fref0[0]->i_frame-1];
- if( lowres_mv[0][0] != 0x7fff )
- {
- M32( mvc[i] ) = (M32( lowres_mv[h->mb.i_mb_xy] )*2)&0xfffeffff;
- i++;
- }
- }
-
- /* spatial predictors */
- if( h->mb.i_neighbour & MB_LEFT )
- {
- int i_mb_l = h->mb.i_mb_xy - 1;
- /* skip MBs didn't go through the whole search process, so mvr is undefined */
- if( !IS_SKIP( h->mb.type[i_mb_l] ) )
- SET_MVP( mvr[i_mb_l] );
- }
- if( h->mb.i_neighbour & MB_TOP )
- {
- int i_mb_t = h->mb.i_mb_top_xy;
- if( !IS_SKIP( h->mb.type[i_mb_t] ) )
- SET_MVP( mvr[i_mb_t] );
-
- if( h->mb.i_neighbour & MB_TOPLEFT && !IS_SKIP( h->mb.type[i_mb_t - 1] ) )
- SET_MVP( mvr[i_mb_t-1] );
- if( h->mb.i_mb_x < h->mb.i_mb_stride - 1 && !IS_SKIP( h->mb.type[i_mb_t + 1] ) )
- SET_MVP( mvr[i_mb_t+1] );
- }
-#undef SET_MVP
-
- /* temporal predictors */
- if( h->fref0[0]->i_ref[0] > 0 )
- {
- x264_frame_t *l0 = h->fref0[0];
- x264_frame_t **fref = i_list ? h->fref1 : h->fref0;
- int field = h->mb.i_mb_y&1;
- int curpoc = h->fdec->i_poc + field*h->sh.i_delta_poc_bottom;
- int refpoc = fref[i_ref>>h->sh.b_mbaff]->i_poc;
- if( h->sh.b_mbaff && field^(i_ref&1) )
- refpoc += h->sh.i_delta_poc_bottom;
-
-#define SET_TMVP(dx, dy) { \
- int i_b4 = h->mb.i_b4_xy + dx*4 + dy*4*h->mb.i_b4_stride; \
- int i_b8 = h->mb.i_b8_xy + dx*2 + dy*2*h->mb.i_b8_stride; \
- int ref_col = l0->ref[0][i_b8]; \
- if( ref_col >= 0 ) \
- { \
- int scale = (curpoc - refpoc) * l0->inv_ref_poc[h->mb.b_interlaced&field][ref_col];\
- mvc[i][0] = (l0->mv[0][i_b4][0]*scale + 128) >> 8;\
- mvc[i][1] = (l0->mv[0][i_b4][1]*scale + 128) >> 8;\
- i++; \
- } \
- }
-
- SET_TMVP(0,0);
- if( h->mb.i_mb_x < h->sps->i_mb_width-1 )
- SET_TMVP(1,0);
- if( h->mb.i_mb_y < h->sps->i_mb_height-1 )
- SET_TMVP(0,1);
-#undef SET_TMVP
- }
-
- *i_mvc = i;
-}
-
-/* Set up a lookup table for delta pocs to reduce an IDIV to an IMUL */
-static void setup_inverse_delta_pocs( x264_t *h )
-{
- int i, field;
- for( field = 0; field <= h->sh.b_mbaff; field++ )
- {
- int curpoc = h->fdec->i_poc + field*h->sh.i_delta_poc_bottom;
- for( i = 0; i < (h->i_ref0<<h->sh.b_mbaff); i++ )
- {
- int refpoc = h->fref0[i>>h->sh.b_mbaff]->i_poc;
- if( h->sh.b_mbaff && field^(i&1) )
- refpoc += h->sh.i_delta_poc_bottom;
- int delta = curpoc - refpoc;
-
- h->fdec->inv_ref_poc[field][i] = (256 + delta/2) / delta;
- }
- }
-}
-