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libavcodec/h264_direct.c

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00001 /*
00002  * H.26L/H.264/AVC/JVT/14496-10/... direct mb/block decoding
00003  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00028 #include "internal.h"
00029 #include "dsputil.h"
00030 #include "avcodec.h"
00031 #include "mpegvideo.h"
00032 #include "h264.h"
00033 #include "rectangle.h"
00034 #include "thread.h"
00035 
00036 //#undef NDEBUG
00037 #include <assert.h>
00038 
00039 
00040 static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
00041     int poc0 = h->ref_list[0][i].poc;
00042     int td = av_clip(poc1 - poc0, -128, 127);
00043     if(td == 0 || h->ref_list[0][i].long_ref){
00044         return 256;
00045     }else{
00046         int tb = av_clip(poc - poc0, -128, 127);
00047         int tx = (16384 + (FFABS(td) >> 1)) / td;
00048         return av_clip((tb*tx + 32) >> 6, -1024, 1023);
00049     }
00050 }
00051 
00052 void ff_h264_direct_dist_scale_factor(H264Context * const h){
00053     MpegEncContext * const s = &h->s;
00054     const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
00055     const int poc1 = h->ref_list[1][0].poc;
00056     int i, field;
00057     for(field=0; field<2; field++){
00058         const int poc  = h->s.current_picture_ptr->field_poc[field];
00059         const int poc1 = h->ref_list[1][0].field_poc[field];
00060         for(i=0; i < 2*h->ref_count[0]; i++)
00061             h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
00062     }
00063 
00064     for(i=0; i<h->ref_count[0]; i++){
00065         h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
00066     }
00067 }
00068 
00069 static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
00070     MpegEncContext * const s = &h->s;
00071     Picture * const ref1 = &h->ref_list[1][0];
00072     int j, old_ref, rfield;
00073     int start= mbafi ? 16                      : 0;
00074     int end  = mbafi ? 16+2*h->ref_count[0]    : h->ref_count[0];
00075     int interl= mbafi || s->picture_structure != PICT_FRAME;
00076 
00077     /* bogus; fills in for missing frames */
00078     memset(map[list], 0, sizeof(map[list]));
00079 
00080     for(rfield=0; rfield<2; rfield++){
00081         for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
00082             int poc = ref1->ref_poc[colfield][list][old_ref];
00083 
00084             if     (!interl)
00085                 poc |= 3;
00086             else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
00087                 poc= (poc&~3) + rfield + 1;
00088 
00089             for(j=start; j<end; j++){
00090                 if (4 * h->ref_list[0][j].frame_num + (h->ref_list[0][j].f.reference & 3) == poc) {
00091                     int cur_ref= mbafi ? (j-16)^field : j;
00092                     map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
00093                     if(rfield == field || !interl)
00094                         map[list][old_ref] = cur_ref;
00095                     break;
00096                 }
00097             }
00098         }
00099     }
00100 }
00101 
00102 void ff_h264_direct_ref_list_init(H264Context * const h){
00103     MpegEncContext * const s = &h->s;
00104     Picture * const ref1 = &h->ref_list[1][0];
00105     Picture * const cur = s->current_picture_ptr;
00106     int list, j, field;
00107     int sidx= (s->picture_structure&1)^1;
00108     int ref1sidx = (ref1->f.reference&1)^1;
00109 
00110     for(list=0; list<2; list++){
00111         cur->ref_count[sidx][list] = h->ref_count[list];
00112         for(j=0; j<h->ref_count[list]; j++)
00113             cur->ref_poc[sidx][list][j] = 4 * h->ref_list[list][j].frame_num + (h->ref_list[list][j].f.reference & 3);
00114     }
00115 
00116     if(s->picture_structure == PICT_FRAME){
00117         memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
00118         memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
00119     }
00120 
00121     cur->mbaff= FRAME_MBAFF;
00122 
00123     h->col_fieldoff= 0;
00124     if(s->picture_structure == PICT_FRAME){
00125         int cur_poc = s->current_picture_ptr->poc;
00126         int *col_poc = h->ref_list[1]->field_poc;
00127         h->col_parity= (FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc));
00128         ref1sidx=sidx= h->col_parity;
00129     } else if (!(s->picture_structure & h->ref_list[1][0].f.reference) && !h->ref_list[1][0].mbaff) { // FL -> FL & differ parity
00130         h->col_fieldoff = 2 * h->ref_list[1][0].f.reference - 3;
00131     }
00132 
00133     if (cur->f.pict_type != AV_PICTURE_TYPE_B || h->direct_spatial_mv_pred)
00134         return;
00135 
00136     for(list=0; list<2; list++){
00137         fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
00138         if(FRAME_MBAFF)
00139         for(field=0; field<2; field++)
00140             fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
00141     }
00142 }
00143 
00144 static void await_reference_mb_row(H264Context * const h, Picture *ref, int mb_y)
00145 {
00146     int ref_field = ref->f.reference - 1;
00147     int ref_field_picture = ref->field_picture;
00148     int ref_height = 16*h->s.mb_height >> ref_field_picture;
00149 
00150     if(!HAVE_THREADS || !(h->s.avctx->active_thread_type&FF_THREAD_FRAME))
00151         return;
00152 
00153     //FIXME it can be safe to access mb stuff
00154     //even if pixels aren't deblocked yet
00155 
00156     ff_thread_await_progress((AVFrame*)ref, FFMIN(16*mb_y >> ref_field_picture, ref_height-1),
00157                              ref_field_picture && ref_field);
00158 }
00159 
00160 static void pred_spatial_direct_motion(H264Context * const h, int *mb_type){
00161     MpegEncContext * const s = &h->s;
00162     int b8_stride = 2;
00163     int b4_stride = h->b_stride;
00164     int mb_xy = h->mb_xy, mb_y = s->mb_y;
00165     int mb_type_col[2];
00166     const int16_t (*l1mv0)[2], (*l1mv1)[2];
00167     const int8_t *l1ref0, *l1ref1;
00168     const int is_b8x8 = IS_8X8(*mb_type);
00169     unsigned int sub_mb_type= MB_TYPE_L0L1;
00170     int i8, i4;
00171     int ref[2];
00172     int mv[2];
00173     int list;
00174 
00175     assert(h->ref_list[1][0].f.reference & 3);
00176 
00177     await_reference_mb_row(h, &h->ref_list[1][0], s->mb_y + !!IS_INTERLACED(*mb_type));
00178 
00179 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
00180 
00181 
00182     /* ref = min(neighbors) */
00183     for(list=0; list<2; list++){
00184         int left_ref = h->ref_cache[list][scan8[0] - 1];
00185         int top_ref  = h->ref_cache[list][scan8[0] - 8];
00186         int refc = h->ref_cache[list][scan8[0] - 8 + 4];
00187         const int16_t *C= h->mv_cache[list][ scan8[0] - 8 + 4];
00188         if(refc == PART_NOT_AVAILABLE){
00189             refc = h->ref_cache[list][scan8[0] - 8 - 1];
00190             C    = h-> mv_cache[list][scan8[0] - 8 - 1];
00191         }
00192         ref[list] = FFMIN3((unsigned)left_ref, (unsigned)top_ref, (unsigned)refc);
00193         if(ref[list] >= 0){
00194             //this is just pred_motion() but with the cases removed that cannot happen for direct blocks
00195             const int16_t * const A= h->mv_cache[list][ scan8[0] - 1 ];
00196             const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
00197 
00198             int match_count= (left_ref==ref[list]) + (top_ref==ref[list]) + (refc==ref[list]);
00199             if(match_count > 1){ //most common
00200                 mv[list]= pack16to32(mid_pred(A[0], B[0], C[0]),
00201                                      mid_pred(A[1], B[1], C[1]) );
00202             }else {
00203                 assert(match_count==1);
00204                 if(left_ref==ref[list]){
00205                     mv[list]= AV_RN32A(A);
00206                 }else if(top_ref==ref[list]){
00207                     mv[list]= AV_RN32A(B);
00208                 }else{
00209                     mv[list]= AV_RN32A(C);
00210                 }
00211             }
00212         }else{
00213             int mask= ~(MB_TYPE_L0 << (2*list));
00214             mv[list] = 0;
00215             ref[list] = -1;
00216             if(!is_b8x8)
00217                 *mb_type &= mask;
00218             sub_mb_type &= mask;
00219         }
00220     }
00221     if(ref[0] < 0 && ref[1] < 0){
00222         ref[0] = ref[1] = 0;
00223         if(!is_b8x8)
00224             *mb_type |= MB_TYPE_L0L1;
00225         sub_mb_type |= MB_TYPE_L0L1;
00226     }
00227 
00228     if(!(is_b8x8|mv[0]|mv[1])){
00229         fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
00230         fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
00231         fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, 0, 4);
00232         fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, 0, 4);
00233         *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
00234         return;
00235     }
00236 
00237     if (IS_INTERLACED(h->ref_list[1][0].f.mb_type[mb_xy])) { // AFL/AFR/FR/FL -> AFL/FL
00238         if (!IS_INTERLACED(*mb_type)) {                          //     AFR/FR    -> AFL/FL
00239             mb_y = (s->mb_y&~1) + h->col_parity;
00240             mb_xy= s->mb_x + ((s->mb_y&~1) + h->col_parity)*s->mb_stride;
00241             b8_stride = 0;
00242         }else{
00243             mb_y  += h->col_fieldoff;
00244             mb_xy += s->mb_stride*h->col_fieldoff; // non zero for FL -> FL & differ parity
00245         }
00246         goto single_col;
00247     }else{                                               // AFL/AFR/FR/FL -> AFR/FR
00248         if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
00249             mb_y = s->mb_y&~1;
00250             mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
00251             mb_type_col[0] = h->ref_list[1][0].f.mb_type[mb_xy];
00252             mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy + s->mb_stride];
00253             b8_stride = 2+4*s->mb_stride;
00254             b4_stride *= 6;
00255             if (IS_INTERLACED(mb_type_col[0]) != IS_INTERLACED(mb_type_col[1])) {
00256                 mb_type_col[0] &= ~MB_TYPE_INTERLACED;
00257                 mb_type_col[1] &= ~MB_TYPE_INTERLACED;
00258             }
00259 
00260             sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
00261             if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
00262                 && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
00263                 && !is_b8x8){
00264                 *mb_type   |= MB_TYPE_16x8 |MB_TYPE_DIRECT2; /* B_16x8 */
00265             }else{
00266                 *mb_type   |= MB_TYPE_8x8;
00267             }
00268         }else{                                           //     AFR/FR    -> AFR/FR
00269 single_col:
00270             mb_type_col[0] =
00271             mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy];
00272 
00273             sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
00274             if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
00275                 *mb_type   |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_16x16 */
00276             }else if(!is_b8x8 && (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16))){
00277                 *mb_type   |= MB_TYPE_DIRECT2 | (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16));
00278             }else{
00279                 if(!h->sps.direct_8x8_inference_flag){
00280                     /* FIXME save sub mb types from previous frames (or derive from MVs)
00281                     * so we know exactly what block size to use */
00282                     sub_mb_type += (MB_TYPE_8x8-MB_TYPE_16x16); /* B_SUB_4x4 */
00283                 }
00284                 *mb_type   |= MB_TYPE_8x8;
00285             }
00286         }
00287     }
00288 
00289     await_reference_mb_row(h, &h->ref_list[1][0], mb_y);
00290 
00291     l1mv0  = &h->ref_list[1][0].f.motion_val[0][h->mb2b_xy [mb_xy]];
00292     l1mv1  = &h->ref_list[1][0].f.motion_val[1][h->mb2b_xy [mb_xy]];
00293     l1ref0 = &h->ref_list[1][0].f.ref_index [0][4 * mb_xy];
00294     l1ref1 = &h->ref_list[1][0].f.ref_index [1][4 * mb_xy];
00295     if(!b8_stride){
00296         if(s->mb_y&1){
00297             l1ref0 += 2;
00298             l1ref1 += 2;
00299             l1mv0  +=  2*b4_stride;
00300             l1mv1  +=  2*b4_stride;
00301         }
00302     }
00303 
00304 
00305         if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
00306             int n=0;
00307             for(i8=0; i8<4; i8++){
00308                 int x8 = i8&1;
00309                 int y8 = i8>>1;
00310                 int xy8 = x8+y8*b8_stride;
00311                 int xy4 = 3*x8+y8*b4_stride;
00312                 int a,b;
00313 
00314                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
00315                     continue;
00316                 h->sub_mb_type[i8] = sub_mb_type;
00317 
00318                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
00319                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
00320                 if(!IS_INTRA(mb_type_col[y8]) && !h->ref_list[1][0].long_ref
00321                    && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
00322                        || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
00323                     a=b=0;
00324                     if(ref[0] > 0)
00325                         a= mv[0];
00326                     if(ref[1] > 0)
00327                         b= mv[1];
00328                     n++;
00329                 }else{
00330                     a= mv[0];
00331                     b= mv[1];
00332                 }
00333                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
00334                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
00335             }
00336             if(!is_b8x8 && !(n&3))
00337                 *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
00338         }else if(IS_16X16(*mb_type)){
00339             int a,b;
00340 
00341             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
00342             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
00343             if(!IS_INTRA(mb_type_col[0]) && !h->ref_list[1][0].long_ref
00344                && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
00345                    || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
00346                        && h->x264_build>33U))){
00347                 a=b=0;
00348                 if(ref[0] > 0)
00349                     a= mv[0];
00350                 if(ref[1] > 0)
00351                     b= mv[1];
00352             }else{
00353                 a= mv[0];
00354                 b= mv[1];
00355             }
00356             fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
00357             fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
00358         }else{
00359             int n=0;
00360             for(i8=0; i8<4; i8++){
00361                 const int x8 = i8&1;
00362                 const int y8 = i8>>1;
00363 
00364                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
00365                     continue;
00366                 h->sub_mb_type[i8] = sub_mb_type;
00367 
00368                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, mv[0], 4);
00369                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, mv[1], 4);
00370                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
00371                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
00372 
00373                 assert(b8_stride==2);
00374                 /* col_zero_flag */
00375                 if(!IS_INTRA(mb_type_col[0]) && !h->ref_list[1][0].long_ref && (   l1ref0[i8] == 0
00376                                               || (l1ref0[i8] < 0 && l1ref1[i8] == 0
00377                                                   && h->x264_build>33U))){
00378                     const int16_t (*l1mv)[2]= l1ref0[i8] == 0 ? l1mv0 : l1mv1;
00379                     if(IS_SUB_8X8(sub_mb_type)){
00380                         const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
00381                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
00382                             if(ref[0] == 0)
00383                                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
00384                             if(ref[1] == 0)
00385                                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
00386                             n+=4;
00387                         }
00388                     }else{
00389                         int m=0;
00390                     for(i4=0; i4<4; i4++){
00391                         const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
00392                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
00393                             if(ref[0] == 0)
00394                                 AV_ZERO32(h->mv_cache[0][scan8[i8*4+i4]]);
00395                             if(ref[1] == 0)
00396                                 AV_ZERO32(h->mv_cache[1][scan8[i8*4+i4]]);
00397                             m++;
00398                         }
00399                     }
00400                     if(!(m&3))
00401                         h->sub_mb_type[i8]+= MB_TYPE_16x16 - MB_TYPE_8x8;
00402                     n+=m;
00403                     }
00404                 }
00405             }
00406             if(!is_b8x8 && !(n&15))
00407                 *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
00408         }
00409 }
00410 
00411 static void pred_temp_direct_motion(H264Context * const h, int *mb_type){
00412     MpegEncContext * const s = &h->s;
00413     int b8_stride = 2;
00414     int b4_stride = h->b_stride;
00415     int mb_xy = h->mb_xy, mb_y = s->mb_y;
00416     int mb_type_col[2];
00417     const int16_t (*l1mv0)[2], (*l1mv1)[2];
00418     const int8_t *l1ref0, *l1ref1;
00419     const int is_b8x8 = IS_8X8(*mb_type);
00420     unsigned int sub_mb_type;
00421     int i8, i4;
00422 
00423     assert(h->ref_list[1][0].f.reference & 3);
00424 
00425     await_reference_mb_row(h, &h->ref_list[1][0], s->mb_y + !!IS_INTERLACED(*mb_type));
00426 
00427     if (IS_INTERLACED(h->ref_list[1][0].f.mb_type[mb_xy])) { // AFL/AFR/FR/FL -> AFL/FL
00428         if (!IS_INTERLACED(*mb_type)) {                          //     AFR/FR    -> AFL/FL
00429             mb_y = (s->mb_y&~1) + h->col_parity;
00430             mb_xy= s->mb_x + ((s->mb_y&~1) + h->col_parity)*s->mb_stride;
00431             b8_stride = 0;
00432         }else{
00433             mb_y  += h->col_fieldoff;
00434             mb_xy += s->mb_stride*h->col_fieldoff; // non zero for FL -> FL & differ parity
00435         }
00436         goto single_col;
00437     }else{                                               // AFL/AFR/FR/FL -> AFR/FR
00438         if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
00439             mb_y = s->mb_y&~1;
00440             mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
00441             mb_type_col[0] = h->ref_list[1][0].f.mb_type[mb_xy];
00442             mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy + s->mb_stride];
00443             b8_stride = 2+4*s->mb_stride;
00444             b4_stride *= 6;
00445             if (IS_INTERLACED(mb_type_col[0]) != IS_INTERLACED(mb_type_col[1])) {
00446                 mb_type_col[0] &= ~MB_TYPE_INTERLACED;
00447                 mb_type_col[1] &= ~MB_TYPE_INTERLACED;
00448             }
00449 
00450             sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
00451 
00452             if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
00453                 && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
00454                 && !is_b8x8){
00455                 *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
00456             }else{
00457                 *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
00458             }
00459         }else{                                           //     AFR/FR    -> AFR/FR
00460 single_col:
00461             mb_type_col[0] =
00462             mb_type_col[1] = h->ref_list[1][0].f.mb_type[mb_xy];
00463 
00464             sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
00465             if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
00466                 *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
00467             }else if(!is_b8x8 && (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16))){
00468                 *mb_type   |= MB_TYPE_L0L1|MB_TYPE_DIRECT2 | (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16));
00469             }else{
00470                 if(!h->sps.direct_8x8_inference_flag){
00471                     /* FIXME save sub mb types from previous frames (or derive from MVs)
00472                     * so we know exactly what block size to use */
00473                     sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
00474                 }
00475                 *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
00476             }
00477         }
00478     }
00479 
00480     await_reference_mb_row(h, &h->ref_list[1][0], mb_y);
00481 
00482     l1mv0  = &h->ref_list[1][0].f.motion_val[0][h->mb2b_xy [mb_xy]];
00483     l1mv1  = &h->ref_list[1][0].f.motion_val[1][h->mb2b_xy [mb_xy]];
00484     l1ref0 = &h->ref_list[1][0].f.ref_index [0][4 * mb_xy];
00485     l1ref1 = &h->ref_list[1][0].f.ref_index [1][4 * mb_xy];
00486     if(!b8_stride){
00487         if(s->mb_y&1){
00488             l1ref0 += 2;
00489             l1ref1 += 2;
00490             l1mv0  +=  2*b4_stride;
00491             l1mv1  +=  2*b4_stride;
00492         }
00493     }
00494 
00495     {
00496         const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
00497         const int *dist_scale_factor = h->dist_scale_factor;
00498         int ref_offset;
00499 
00500         if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
00501             map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
00502             map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
00503             dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
00504         }
00505         ref_offset = (h->ref_list[1][0].mbaff<<4) & (mb_type_col[0]>>3); //if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0])) ref_offset=16 else 0
00506 
00507         if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
00508             int y_shift  = 2*!IS_INTERLACED(*mb_type);
00509             assert(h->sps.direct_8x8_inference_flag);
00510 
00511             for(i8=0; i8<4; i8++){
00512                 const int x8 = i8&1;
00513                 const int y8 = i8>>1;
00514                 int ref0, scale;
00515                 const int16_t (*l1mv)[2]= l1mv0;
00516 
00517                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
00518                     continue;
00519                 h->sub_mb_type[i8] = sub_mb_type;
00520 
00521                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
00522                 if(IS_INTRA(mb_type_col[y8])){
00523                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
00524                     fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
00525                     fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
00526                     continue;
00527                 }
00528 
00529                 ref0 = l1ref0[x8 + y8*b8_stride];
00530                 if(ref0 >= 0)
00531                     ref0 = map_col_to_list0[0][ref0 + ref_offset];
00532                 else{
00533                     ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
00534                     l1mv= l1mv1;
00535                 }
00536                 scale = dist_scale_factor[ref0];
00537                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
00538 
00539                 {
00540                     const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
00541                     int my_col = (mv_col[1]<<y_shift)/2;
00542                     int mx = (scale * mv_col[0] + 128) >> 8;
00543                     int my = (scale * my_col + 128) >> 8;
00544                     fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
00545                     fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
00546                 }
00547             }
00548             return;
00549         }
00550 
00551         /* one-to-one mv scaling */
00552 
00553         if(IS_16X16(*mb_type)){
00554             int ref, mv0, mv1;
00555 
00556             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
00557             if(IS_INTRA(mb_type_col[0])){
00558                 ref=mv0=mv1=0;
00559             }else{
00560                 const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
00561                                                 : map_col_to_list0[1][l1ref1[0] + ref_offset];
00562                 const int scale = dist_scale_factor[ref0];
00563                 const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
00564                 int mv_l0[2];
00565                 mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
00566                 mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
00567                 ref= ref0;
00568                 mv0= pack16to32(mv_l0[0],mv_l0[1]);
00569                 mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
00570             }
00571             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
00572             fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
00573             fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
00574         }else{
00575             for(i8=0; i8<4; i8++){
00576                 const int x8 = i8&1;
00577                 const int y8 = i8>>1;
00578                 int ref0, scale;
00579                 const int16_t (*l1mv)[2]= l1mv0;
00580 
00581                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
00582                     continue;
00583                 h->sub_mb_type[i8] = sub_mb_type;
00584                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
00585                 if(IS_INTRA(mb_type_col[0])){
00586                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
00587                     fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
00588                     fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
00589                     continue;
00590                 }
00591 
00592                 assert(b8_stride == 2);
00593                 ref0 = l1ref0[i8];
00594                 if(ref0 >= 0)
00595                     ref0 = map_col_to_list0[0][ref0 + ref_offset];
00596                 else{
00597                     ref0 = map_col_to_list0[1][l1ref1[i8] + ref_offset];
00598                     l1mv= l1mv1;
00599                 }
00600                 scale = dist_scale_factor[ref0];
00601 
00602                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
00603                 if(IS_SUB_8X8(sub_mb_type)){
00604                     const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
00605                     int mx = (scale * mv_col[0] + 128) >> 8;
00606                     int my = (scale * mv_col[1] + 128) >> 8;
00607                     fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
00608                     fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
00609                 }else
00610                 for(i4=0; i4<4; i4++){
00611                     const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
00612                     int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
00613                     mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
00614                     mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
00615                     AV_WN32A(h->mv_cache[1][scan8[i8*4+i4]],
00616                         pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]));
00617                 }
00618             }
00619         }
00620     }
00621 }
00622 
00623 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type){
00624     if(h->direct_spatial_mv_pred){
00625         pred_spatial_direct_motion(h, mb_type);
00626     }else{
00627         pred_temp_direct_motion(h, mb_type);
00628     }
00629 }
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